From f2deb81e4aff3cb9b181da92688d667eda6dc424 Mon Sep 17 00:00:00 2001 From: JianFeeeee Date: Tue, 25 Aug 2026 10:20:25 +0800 Subject: [PATCH] =?UTF-8?q?vendor:=20=E5=BC=95=E5=85=A5=20Lua=202.5=20?= =?UTF-8?q?=E5=AE=98=E6=96=B9=E6=BA=90=E7=A0=81=20+=20=E7=A7=BB=E6=A4=8D?= =?UTF-8?q?=E8=AF=84=E4=BC=B0=20(lua=5F2.5=20=E5=88=86=E6=94=AF)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - 前 lua_State 时代 API, 比 3.2 更原始(无 upvalue/无独立编译) - 评估结论: 不建议移植(多实例冲突+管道模式不可实现), 见 doc/ADAPTATION-lua25.md - 建议历史脚本用 5.1 兼容模式运行替代 --- doc/ADAPTATION-lua25.md | 19 + lib/lua/CMakeLists.txt | 81 -- lib/lua/COPYRIGHT | 24 + lib/lua/HISTORY | 28 + lib/lua/Makefile | 232 ---- lib/lua/include/Makefile | 17 + lib/lua/include/lua.h | 116 ++ lib/lua/include/luadebug.h | 31 + lib/lua/include/lualib.h | 38 + lib/lua/lapi.c | 1479 ------------------------ lib/lua/lapi.h | 65 -- lib/lua/lauxlib.c | 1215 -------------------- lib/lua/lauxlib.h | 271 ----- lib/lua/lbaselib.c | 552 --------- lib/lua/lcode.c | 1970 -------------------------------- lib/lua/lcode.h | 105 -- lib/lua/lcorolib.c | 225 ---- lib/lua/lctype.c | 64 -- lib/lua/lctype.h | 101 -- lib/lua/ldblib.c | 477 -------- lib/lua/ldebug.c | 979 ---------------- lib/lua/ldebug.h | 65 -- lib/lua/ldo.c | 1192 -------------------- lib/lua/ldo.h | 99 -- lib/lua/ldump.c | 307 ----- lib/lua/lfunc.c | 314 ------ lib/lua/lfunc.h | 65 -- lib/lua/lgc.c | 1804 ----------------------------- lib/lua/lgc.h | 268 ----- lib/lua/linit.c | 63 -- lib/lua/liolib.c | 841 -------------- lib/lua/ljumptab.h | 114 -- lib/lua/llex.c | 604 ---------- lib/lua/llex.h | 93 -- lib/lua/llimits.h | 357 ------ lib/lua/lmathlib.c | 765 ------------- lib/lua/lmem.c | 215 ---- lib/lua/lmem.h | 96 -- lib/lua/loadlib.c | 748 ------------ lib/lua/lobject.c | 718 ------------ lib/lua/lobject.h | 865 -------------- lib/lua/lopcodes.c | 131 --- lib/lua/lopcodes.h | 444 -------- lib/lua/lopnames.h | 105 -- lib/lua/loslib.c | 432 ------- lib/lua/lparser.c | 2193 ------------------------------------ lib/lua/lparser.h | 197 ---- lib/lua/lprefix.h | 45 - lib/lua/lstate.c | 425 ------- lib/lua/lstate.h | 451 -------- lib/lua/lstring.c | 353 ------ lib/lua/lstring.h | 73 -- lib/lua/lstrlib.c | 1900 ------------------------------- lib/lua/ltable.c | 1355 ---------------------- lib/lua/ltable.h | 184 --- lib/lua/ltablib.c | 429 ------- lib/lua/ltm.c | 364 ------ lib/lua/ltm.h | 105 -- lib/lua/lua.c | 794 ------------- lib/lua/lua.h | 547 --------- lib/lua/lua.hpp | 10 - lib/lua/luac.c | 733 ------------ lib/lua/luaconf.h | 756 ------------- lib/lua/lualib.h | 65 -- lib/lua/lundump.c | 421 ------- lib/lua/lundump.h | 40 - lib/lua/lutf8lib.c | 294 ----- lib/lua/lvm.c | 1978 -------------------------------- lib/lua/lvm.h | 136 --- lib/lua/lzio.c | 89 -- lib/lua/lzio.h | 67 -- lib/lua/src/Makefile | 66 ++ lib/lua/src/fallback.c | 191 ++++ lib/lua/src/fallback.h | 37 + lib/lua/src/func.c | 156 +++ lib/lua/src/func.h | 44 + lib/lua/src/hash.c | 319 ++++++ lib/lua/src/hash.h | 38 + lib/lua/src/inout.c | 300 +++++ lib/lua/src/inout.h | 34 + lib/lua/src/lex.c | 341 ++++++ lib/lua/src/lex.h | 19 + lib/lua/src/lua.stx | 796 +++++++++++++ lib/lua/src/luac/Makefile | 24 + lib/lua/src/luac/dump.c | 248 ++++ lib/lua/src/luac/luac.c | 105 ++ lib/lua/src/luac/luac.h | 24 + lib/lua/src/luac/print.c | 190 ++++ lib/lua/src/luac/print.h | 76 ++ lib/lua/src/mem.c | 58 + lib/lua/src/mem.h | 39 + lib/lua/src/opcode.c | 1330 ++++++++++++++++++++++ lib/lua/src/opcode.h | 150 +++ lib/lua/src/parser.c | 1668 +++++++++++++++++++++++++++ lib/lua/src/parser.h | 38 + lib/lua/src/table.c | 278 +++++ lib/lua/src/table.h | 38 + lib/lua/src/tree.c | 145 +++ lib/lua/src/tree.h | 28 + lib/lua/src/types.h | 29 + lib/lua/src/undump.c | 333 ++++++ lib/lua/src/undump.h | 23 + 102 files changed, 7438 insertions(+), 32525 deletions(-) create mode 100644 doc/ADAPTATION-lua25.md delete mode 100755 lib/lua/CMakeLists.txt create mode 100644 lib/lua/COPYRIGHT create mode 100644 lib/lua/HISTORY delete mode 100644 lib/lua/Makefile create mode 100644 lib/lua/include/Makefile create mode 100644 lib/lua/include/lua.h create mode 100644 lib/lua/include/luadebug.h create mode 100644 lib/lua/include/lualib.h delete mode 100644 lib/lua/lapi.c delete mode 100644 lib/lua/lapi.h delete mode 100644 lib/lua/lauxlib.c delete mode 100644 lib/lua/lauxlib.h delete mode 100644 lib/lua/lbaselib.c delete mode 100644 lib/lua/lcode.c delete mode 100644 lib/lua/lcode.h delete mode 100644 lib/lua/lcorolib.c delete mode 100644 lib/lua/lctype.c delete mode 100644 lib/lua/lctype.h delete mode 100644 lib/lua/ldblib.c delete mode 100644 lib/lua/ldebug.c delete mode 100644 lib/lua/ldebug.h delete mode 100644 lib/lua/ldo.c delete mode 100644 lib/lua/ldo.h delete mode 100644 lib/lua/ldump.c delete mode 100644 lib/lua/lfunc.c delete mode 100644 lib/lua/lfunc.h delete mode 100644 lib/lua/lgc.c delete mode 100644 lib/lua/lgc.h delete mode 100644 lib/lua/linit.c delete mode 100644 lib/lua/liolib.c delete mode 100644 lib/lua/ljumptab.h delete mode 100644 lib/lua/llex.c delete mode 100644 lib/lua/llex.h delete mode 100644 lib/lua/llimits.h delete mode 100644 lib/lua/lmathlib.c delete mode 100644 lib/lua/lmem.c delete mode 100644 lib/lua/lmem.h delete mode 100644 lib/lua/loadlib.c delete mode 100644 lib/lua/lobject.c delete mode 100644 lib/lua/lobject.h delete mode 100644 lib/lua/lopcodes.c delete mode 100644 lib/lua/lopcodes.h delete mode 100644 lib/lua/lopnames.h delete mode 100644 lib/lua/loslib.c delete mode 100644 lib/lua/lparser.c delete mode 100644 lib/lua/lparser.h delete mode 100644 lib/lua/lprefix.h delete mode 100644 lib/lua/lstate.c delete mode 100644 lib/lua/lstate.h delete mode 100644 lib/lua/lstring.c delete mode 100644 lib/lua/lstring.h delete mode 100644 lib/lua/lstrlib.c delete mode 100644 lib/lua/ltable.c delete mode 100644 lib/lua/ltable.h delete mode 100644 lib/lua/ltablib.c delete mode 100644 lib/lua/ltm.c delete mode 100644 lib/lua/ltm.h delete mode 100644 lib/lua/lua.c delete mode 100644 lib/lua/lua.h delete mode 100644 lib/lua/lua.hpp delete mode 100644 lib/lua/luac.c delete mode 100644 lib/lua/luaconf.h delete mode 100644 lib/lua/lualib.h delete mode 100644 lib/lua/lundump.c delete mode 100644 lib/lua/lundump.h delete mode 100644 lib/lua/lutf8lib.c delete mode 100644 lib/lua/lvm.c delete mode 100644 lib/lua/lvm.h delete mode 100644 lib/lua/lzio.c delete mode 100644 lib/lua/lzio.h create mode 100644 lib/lua/src/Makefile create mode 100644 lib/lua/src/fallback.c create mode 100644 lib/lua/src/fallback.h create mode 100644 lib/lua/src/func.c create mode 100644 lib/lua/src/func.h create mode 100644 lib/lua/src/hash.c create mode 100644 lib/lua/src/hash.h create mode 100644 lib/lua/src/inout.c create mode 100644 lib/lua/src/inout.h create mode 100644 lib/lua/src/lex.c create mode 100644 lib/lua/src/lex.h create mode 100644 lib/lua/src/lua.stx create mode 100644 lib/lua/src/luac/Makefile create mode 100644 lib/lua/src/luac/dump.c create mode 100644 lib/lua/src/luac/luac.c create mode 100644 lib/lua/src/luac/luac.h create mode 100644 lib/lua/src/luac/print.c create mode 100644 lib/lua/src/luac/print.h create mode 100644 lib/lua/src/mem.c create mode 100644 lib/lua/src/mem.h create mode 100644 lib/lua/src/opcode.c create mode 100644 lib/lua/src/opcode.h create mode 100644 lib/lua/src/parser.c create mode 100644 lib/lua/src/parser.h create mode 100644 lib/lua/src/table.c create mode 100644 lib/lua/src/table.h create mode 100644 lib/lua/src/tree.c create mode 100644 lib/lua/src/tree.h create mode 100644 lib/lua/src/types.h create mode 100644 lib/lua/src/undump.c create mode 100644 lib/lua/src/undump.h diff --git a/doc/ADAPTATION-lua25.md b/doc/ADAPTATION-lua25.md new file mode 100644 index 0000000..ecebaee --- /dev/null +++ b/doc/ADAPTATION-lua25.md @@ -0,0 +1,19 @@ +# Lua 2.5 分支移植评估（ADAPTATION.md） + +> 本分支已 vendor Lua 2.5 官方源码到 `lib/lua/`（src/ + include/）。 +> **桥接层尚未适配，且不建议移植。** + +## 结论：不建议移植 + +Lua 2.5（1996）与 Lua 3.2 同属"前 lua_State 时代"，且比 3.2 更原始： + +1. **全局单例状态机** —— `lua_open(void)` 无参数无句柄，与本项目多 runner 实例抽象根本冲突 +2. **fallback 机制而非 metatable** —— 面向对象模型完全不同 +3. **无独立编译** —— `lua_dofile(char*)` 一步式，管道模式的块压栈不可实现 +4. **upvalue 语义缺失** —— 闭包模型尚未引入（3.1 才有 upvalue） +5. 1996 年代码，现代编译器需多处修正才能通过（K&R C 残留） + +若确需支持历史脚本，建议直接用 Lua 5.1 的兼容模式跑（语法子集大部分兼容）， +或参考 lua_3.2 分支的评估做极简 doString-only 桥接。 + +本分支仅作为源码存档。 diff --git a/lib/lua/CMakeLists.txt b/lib/lua/CMakeLists.txt deleted file mode 100755 index 09fa2b2..0000000 --- a/lib/lua/CMakeLists.txt +++ /dev/null @@ -1,81 +0,0 @@ -cmake_minimum_required(VERSION 3.12) -project(lua VERSION 5.5.1 LANGUAGES C) - -# 基础配置 -set(CMAKE_C_STANDARD 99) -set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2 -Wall -Wextra") -set(CMAKE_POSITION_INDEPENDENT_CODE ON) - -# 检测目标系统 - 通过编译器名称检测 -set(IS_WINDOWS FALSE) -if(CMAKE_C_COMPILER MATCHES "mingw" OR CMAKE_SYSTEM_NAME STREQUAL "Windows") - set(IS_WINDOWS TRUE) -endif() - -# 根据目标系统配置 -if(IS_WINDOWS) - message(STATUS "Configuring for Windows/MinGW") - add_compile_definitions(LUA_USE_WINDOWS LUA_COMPAT_5_3) - list(APPEND EXTRA_LIBS "") -elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux") - message(STATUS "Configuring for Linux/HarmonyOS") - add_compile_definitions(LUA_USE_LINUX LUA_COMPAT_5_3) - list(APPEND EXTRA_LIBS dl) -else() - message(STATUS "Configuring for generic Unix") - add_compile_definitions(LUA_USE_POSIX LUA_COMPAT_5_3) - list(APPEND EXTRA_LIBS dl) -endif() - -# Lua 核心文件列表 -file(GLOB LUA_CORE_SOURCES - lapi.c - lcode.c - lctype.c - ldebug.c - ldo.c - ldump.c - lfunc.c - lgc.c - llex.c - lmem.c - lobject.c - lopcodes.c - lparser.c - lstate.c - lstring.c - ltable.c - ltm.c - lundump.c - lvm.c - lzio.c -) - -# Lua 库文件列表 -file(GLOB LUA_LIB_SOURCES - lauxlib.c - lbaselib.c - lcorolib.c - ldblib.c - liolib.c - lmathlib.c - loadlib.c - loslib.c - lstrlib.c - ltablib.c - lutf8lib.c - linit.c -) - -# 特殊源文件的编译器优化 -set_source_files_properties( - llex.c - lparser.c - lcode.c - PROPERTIES COMPILE_FLAGS "-Os" -) - -add_library(lua STATIC - ${LUA_CORE_SOURCES} - ${LUA_LIB_SOURCES} -) diff --git a/lib/lua/COPYRIGHT b/lib/lua/COPYRIGHT new file mode 100644 index 0000000..5ca877a --- /dev/null +++ b/lib/lua/COPYRIGHT @@ -0,0 +1,24 @@ +Copyright (c) 1994-1996 TeCGraf, PUC-Rio. Written by Waldemar Celes Filho, +Roberto Ierusalimschy, Luiz Henrique de Figueiredo. All rights reserved. + +Permission is hereby granted, without written agreement and without license or +royalty fees, to use, copy, modify, and distribute this software and its +documentation for any purpose, subject to the following conditions: + +The above copyright notice and this permission notice shall appear in all +copies or substantial portions of this software. + +The name "Lua" cannot be used for any modified form of this software that does +not originate from the authors. Nevertheless, the name "Lua" may and should be +used to designate the language implemented and described in this package, +even if embedded in any other system, as long as its syntax and semantics +remain unchanged. + +The authors specifically disclaim any warranties, including, but not limited +to, the implied warranties of merchantability and fitness for a particular +purpose. The software provided hereunder is on an "as is" basis, and the +authors have no obligation to provide maintenance, support, updates, +enhancements, or modifications. In no event shall TeCGraf, PUC-Rio, or the +authors be liable to any party for direct, indirect, special, incidental, or +consequential damages arising out of the use of this software and its +documentation. diff --git a/lib/lua/HISTORY b/lib/lua/HISTORY new file mode 100644 index 0000000..3f1e5d6 --- /dev/null +++ b/lib/lua/HISTORY @@ -0,0 +1,28 @@ +Current version is 2.5 + +* Changes since version 2.4 + + io and string libraries are now based on pattern matching; + the old libraries are still available for compatibility + + dofile and dostring can now return values (via return statement) + + better support for 16- and 64-bit machines + + expanded documentation, with more examples + +* Changes since version 2.2 + + external compiler creates portable binary files that can be loaded faster + + interface for debugging and profiling + + new "getglobal" fallback + + new functions for handling references to Lua objects + + new functions in standard lib + + only one copy of each string is stored + + expanded documentation, with more examples + +* Changes since version 2.1 + + functions now may be declared with any "lvalue" as a name + + garbage collection of functions + + support for pipes + +* Changes since version 1.1 + + object-oriented support + + fallbacks + + simplified syntax for tables + + many internal improvements diff --git a/lib/lua/Makefile b/lib/lua/Makefile deleted file mode 100644 index 317cb85..0000000 --- a/lib/lua/Makefile +++ /dev/null @@ -1,232 +0,0 @@ -# Makefile for building Lua -# See ../doc/readme.html for installation and customization instructions. - -# == CHANGE THE SETTINGS BELOW TO SUIT YOUR ENVIRONMENT ======================= - -# Your platform. See PLATS for possible values. -PLAT= guess - -CC= gcc -std=gnu99 -CFLAGS= -O2 -Wall -Wextra $(SYSCFLAGS) $(MYCFLAGS) -LDFLAGS= $(SYSLDFLAGS) $(MYLDFLAGS) -LIBS= -lm $(SYSLIBS) $(MYLIBS) - -AR= ar rcu -RANLIB= ranlib -RM= rm -f -UNAME= uname - -SYSCFLAGS= -SYSLDFLAGS= -SYSLIBS= - -MYCFLAGS= -MYLDFLAGS= -MYLIBS= -MYOBJS= - -# Special flags for compiler modules; -Os reduces code size. -CMCFLAGS= - -# == END OF USER SETTINGS -- NO NEED TO CHANGE ANYTHING BELOW THIS LINE ======= - -PLATS= guess aix bsd c89 freebsd generic ios linux linux-readline macosx mingw posix solaris - -LUA_A= liblua.a -CORE_O= lapi.o lcode.o lctype.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o lmem.o lobject.o lopcodes.o lparser.o lstate.o lstring.o ltable.o ltm.o lundump.o lvm.o lzio.o -LIB_O= lauxlib.o lbaselib.o lcorolib.o ldblib.o liolib.o lmathlib.o loadlib.o loslib.o lstrlib.o ltablib.o lutf8lib.o linit.o -BASE_O= $(CORE_O) $(LIB_O) $(MYOBJS) - -LUA_T= lua -LUA_O= lua.o - -LUAC_T= luac -LUAC_O= luac.o - -ALL_O= $(BASE_O) $(LUA_O) $(LUAC_O) -ALL_T= $(LUA_A) $(LUA_T) $(LUAC_T) -ALL_A= $(LUA_A) - -# Targets start here. -default: $(PLAT) - -all: $(ALL_T) - -o: $(ALL_O) - -a: $(ALL_A) - -$(LUA_A): $(BASE_O) - $(AR) $@ $(BASE_O) - $(RANLIB) $@ - -$(LUA_T): $(LUA_O) $(LUA_A) - $(CC) -o $@ $(LDFLAGS) $(LUA_O) $(LUA_A) $(LIBS) - -$(LUAC_T): $(LUAC_O) $(LUA_A) - $(CC) -o $@ $(LDFLAGS) $(LUAC_O) $(LUA_A) $(LIBS) - -test: - ./$(LUA_T) -v - -clean: - $(RM) $(ALL_T) $(ALL_O) - -depend: - @$(CC) $(CFLAGS) -MM l*.c - -echo: - @echo "PLAT= $(PLAT)" - @echo "CC= $(CC)" - @echo "CFLAGS= $(CFLAGS)" - @echo "LDFLAGS= $(LDFLAGS)" - @echo "LIBS= $(LIBS)" - @echo "AR= $(AR)" - @echo "RANLIB= $(RANLIB)" - @echo "RM= $(RM)" - @echo "UNAME= $(UNAME)" - -# Convenience targets for popular platforms. -ALL= all - -help: - @echo "Do 'make PLATFORM' where PLATFORM is one of these:" - @echo " $(PLATS)" - @echo "See doc/readme.html for complete instructions." - -guess: - @echo Guessing `$(UNAME)` - @$(MAKE) `$(UNAME)` - -AIX aix: - $(MAKE) $(ALL) CC="xlc" CFLAGS="-O2 -DLUA_USE_POSIX -DLUA_USE_DLOPEN" SYSLIBS="-ldl" SYSLDFLAGS="-brtl -bexpall" - -bsd: - $(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_POSIX -DLUA_USE_DLOPEN" SYSLIBS="-Wl,-E" - -c89: - $(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_C89" CC="gcc -std=c89" - @echo '' - @echo '*** C89 does not guarantee 64-bit integers for Lua.' - @echo '*** Make sure to compile all external Lua libraries' - @echo '*** with LUA_USE_C89 to ensure consistency' - @echo '' - -FreeBSD NetBSD OpenBSD freebsd: - $(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_LINUX -DLUA_USE_READLINE -I/usr/include/edit" SYSLIBS="-Wl,-E -ledit" CC="cc" - -generic: $(ALL) - -ios: - $(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_IOS" - -Linux linux: - $(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_LINUX" SYSLIBS="-Wl,-E -ldl" - -linux-readline: - $(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_LINUX -DLUA_USE_READLINE" SYSLIBS="-Wl,-E -ldl -lreadline" - -Darwin macos macosx: - $(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_MACOSX" SYSLIBS="-lreadline" - -mingw: - $(MAKE) "LUA_A=lua55.dll" "LUA_T=lua.exe" \ - "AR=$(CC) -shared -o" "RANLIB=strip --strip-unneeded" \ - "SYSCFLAGS=-DLUA_BUILD_AS_DLL" "SYSLIBS=" "SYSLDFLAGS=-s" lua.exe - $(MAKE) "LUAC_T=luac.exe" luac.exe - -posix: - $(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_POSIX" - -SunOS solaris: - $(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_POSIX -DLUA_USE_DLOPEN -D_REENTRANT" SYSLIBS="-ldl" - -# Targets that do not create files (not all makes understand .PHONY). -.PHONY: all $(PLATS) help test clean default o a depend echo - -# Compiler modules may use special flags. -llex.o: - $(CC) $(CFLAGS) $(CMCFLAGS) -c llex.c - -lparser.o: - $(CC) $(CFLAGS) $(CMCFLAGS) -c lparser.c - -lcode.o: - $(CC) $(CFLAGS) $(CMCFLAGS) -c lcode.c - -# DO NOT DELETE - -lapi.o: lapi.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \ - lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h lstring.h \ - ltable.h lundump.h lvm.h -lauxlib.o: lauxlib.c lprefix.h lua.h luaconf.h lauxlib.h llimits.h -lbaselib.o: lbaselib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h \ - llimits.h -lcode.o: lcode.c lprefix.h lua.h luaconf.h lcode.h llex.h lobject.h \ - llimits.h lzio.h lmem.h lopcodes.h lparser.h ldebug.h lstate.h ltm.h \ - ldo.h lgc.h lstring.h ltable.h lvm.h lopnames.h -lcorolib.o: lcorolib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h \ - llimits.h -lctype.o: lctype.c lprefix.h lctype.h lua.h luaconf.h llimits.h -ldblib.o: ldblib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h llimits.h -ldebug.o: ldebug.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \ - lobject.h ltm.h lzio.h lmem.h lcode.h llex.h lopcodes.h lparser.h \ - ldebug.h ldo.h lfunc.h lstring.h lgc.h ltable.h lvm.h -ldo.o: ldo.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \ - lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h lopcodes.h \ - lparser.h lstring.h ltable.h lundump.h lvm.h -ldump.o: ldump.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \ - lobject.h ltm.h lzio.h lmem.h lgc.h ltable.h lundump.h -lfunc.o: lfunc.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \ - llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h -lgc.o: lgc.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \ - llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h lstring.h ltable.h -linit.o: linit.c lprefix.h lua.h luaconf.h lualib.h lauxlib.h llimits.h -liolib.o: liolib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h llimits.h -llex.o: llex.c lprefix.h lua.h luaconf.h lctype.h llimits.h ldebug.h \ - lstate.h lobject.h ltm.h lzio.h lmem.h ldo.h lgc.h llex.h lparser.h \ - lstring.h ltable.h -lmathlib.o: lmathlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h \ - llimits.h -lmem.o: lmem.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \ - llimits.h ltm.h lzio.h lmem.h ldo.h lgc.h -loadlib.o: loadlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h \ - llimits.h -lobject.o: lobject.c lprefix.h lua.h luaconf.h lctype.h llimits.h \ - ldebug.h lstate.h lobject.h ltm.h lzio.h lmem.h ldo.h lstring.h lgc.h \ - lvm.h -lopcodes.o: lopcodes.c lprefix.h lopcodes.h llimits.h lua.h luaconf.h \ - lobject.h -loslib.o: loslib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h llimits.h -lparser.o: lparser.c lprefix.h lua.h luaconf.h lcode.h llex.h lobject.h \ - llimits.h lzio.h lmem.h lopcodes.h lparser.h ldebug.h lstate.h ltm.h \ - ldo.h lfunc.h lstring.h lgc.h ltable.h -lstate.o: lstate.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \ - lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h llex.h \ - lstring.h ltable.h -lstring.o: lstring.c lprefix.h lua.h luaconf.h ldebug.h lstate.h \ - lobject.h llimits.h ltm.h lzio.h lmem.h ldo.h lstring.h lgc.h -lstrlib.o: lstrlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h \ - llimits.h -ltable.o: ltable.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \ - llimits.h ltm.h lzio.h lmem.h ldo.h lgc.h lstring.h ltable.h lvm.h -ltablib.o: ltablib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h \ - llimits.h -ltm.o: ltm.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \ - llimits.h ltm.h lzio.h lmem.h ldo.h lgc.h lstring.h ltable.h lvm.h -lua.o: lua.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h llimits.h -luac.o: luac.c lprefix.h lua.h luaconf.h lauxlib.h lapi.h llimits.h \ - lstate.h lobject.h ltm.h lzio.h lmem.h ldebug.h lopcodes.h lopnames.h \ - lundump.h -lundump.o: lundump.c lprefix.h lua.h luaconf.h ldebug.h lstate.h \ - lobject.h llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lstring.h lgc.h \ - ltable.h lundump.h -lutf8lib.o: lutf8lib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h \ - llimits.h -lvm.o: lvm.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \ - lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h lopcodes.h \ - lstring.h ltable.h lvm.h ljumptab.h -lzio.o: lzio.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \ - lobject.h ltm.h lzio.h lmem.h - -# (end of Makefile) diff --git a/lib/lua/include/Makefile b/lib/lua/include/Makefile new file mode 100644 index 0000000..e21de74 --- /dev/null +++ b/lib/lua/include/Makefile @@ -0,0 +1,17 @@ +# makefile for lua distribution (includes) + +LUA= .. + +include $(LUA)/config + +SRCS= lua.h lualib.h luadebug.h + +all: + +clean: + +co: + co -f -M $(SRCS) + +klean: clean + rm -f $(SRCS) diff --git a/lib/lua/include/lua.h b/lib/lua/include/lua.h new file mode 100644 index 0000000..6a515d5 --- /dev/null +++ b/lib/lua/include/lua.h @@ -0,0 +1,116 @@ +/* +** LUA - Linguagem para Usuarios de Aplicacao +** Grupo de Tecnologia em Computacao Grafica +** TeCGraf - PUC-Rio +** $Id: lua.h,v 3.32 1996/11/20 13:49:32 roberto Exp $ +*/ + + +#ifndef lua_h +#define lua_h + +#define LUA_VERSION "Lua 2.5.1" +#define LUA_COPYRIGHT "Copyright (C) 1994-1996 TeCGraf" +#define LUA_AUTHORS "W. Celes, R. Ierusalimschy & L. H. de Figueiredo" + + +/* Private Part */ + +typedef enum +{ + LUA_T_NIL = -1, + LUA_T_NUMBER = -2, + LUA_T_STRING = -3, + LUA_T_ARRAY = -4, + LUA_T_FUNCTION = -5, + LUA_T_CFUNCTION= -6, + LUA_T_MARK = -7, + LUA_T_CMARK = -8, + LUA_T_LINE = -9, + LUA_T_USERDATA = 0 +} lua_Type; + + +/* Public Part */ + +#define LUA_NOOBJECT 0 + +typedef void (*lua_CFunction) (void); +typedef unsigned int lua_Object; + +lua_Object lua_setfallback (char *name, lua_CFunction fallback); + +void lua_error (char *s); +int lua_dofile (char *filename); +int lua_dostring (char *string); +int lua_callfunction (lua_Object function); +int lua_call (char *funcname); + +void lua_beginblock (void); +void lua_endblock (void); + +lua_Object lua_getparam (int number); +#define lua_getresult(_) lua_getparam(_) + +#define lua_isnil(_) (lua_type(_)==LUA_T_NIL) +#define lua_istable(_) (lua_type(_)==LUA_T_ARRAY) +#define lua_isuserdata(_) (lua_type(_)>=LUA_T_USERDATA) +#define lua_iscfunction(_) (lua_type(_)==LUA_T_CFUNCTION) +int lua_isnumber (lua_Object object); +int lua_isstring (lua_Object object); +int lua_isfunction (lua_Object object); + +float lua_getnumber (lua_Object object); +char *lua_getstring (lua_Object object); +lua_CFunction lua_getcfunction (lua_Object object); +void *lua_getuserdata (lua_Object object); + +void lua_pushnil (void); +void lua_pushnumber (float n); +void lua_pushstring (char *s); +void lua_pushcfunction (lua_CFunction fn); +void lua_pushusertag (void *u, int tag); +void lua_pushobject (lua_Object object); + +lua_Object lua_getglobal (char *name); +void lua_storeglobal (char *name); + +void lua_storesubscript (void); +lua_Object lua_getsubscript (void); + +int lua_type (lua_Object object); + + +int lua_ref (int lock); +lua_Object lua_getref (int ref); +void lua_pushref (int ref); +void lua_unref (int ref); + +lua_Object lua_createtable (void); + + +/* some useful macros */ + +#define lua_refobject(o,l) (lua_pushobject(o), lua_ref(l)) + +#define lua_register(n,f) (lua_pushcfunction(f), lua_storeglobal(n)) + +#define lua_pushuserdata(u) lua_pushusertag(u, LUA_T_USERDATA) + + +/* for compatibility with old versions. Avoid using these macros */ + +#define lua_lockobject(o) lua_refobject(o,1) +#define lua_lock() lua_ref(1) +#define lua_getlocked lua_getref +#define lua_pushlocked lua_pushref +#define lua_unlock lua_unref + +#define lua_pushliteral(o) lua_pushstring(o) + +#define lua_getindexed(o,n) (lua_pushobject(o), lua_pushnumber(n), lua_getsubscript()) +#define lua_getfield(o,f) (lua_pushobject(o), lua_pushliteral(f), lua_getsubscript()) + +#define lua_copystring(o) (strdup(lua_getstring(o))) + +#endif diff --git a/lib/lua/include/luadebug.h b/lib/lua/include/luadebug.h new file mode 100644 index 0000000..9392967 --- /dev/null +++ b/lib/lua/include/luadebug.h @@ -0,0 +1,31 @@ +/* +** LUA - Linguagem para Usuarios de Aplicacao +** Grupo de Tecnologia em Computacao Grafica +** TeCGraf - PUC-Rio +** $Id: luadebug.h,v 1.6 1996/03/20 17:05:44 roberto Exp $ +*/ + + +#ifndef luadebug_h +#define luadebug_h + +#include "lua.h" + +typedef lua_Object lua_Function; + +typedef void (*lua_LHFunction) (int line); +typedef void (*lua_CHFunction) (lua_Function func, char *file, int line); + +lua_Function lua_stackedfunction (int level); +void lua_funcinfo (lua_Object func, char **filename, int *linedefined); +int lua_currentline (lua_Function func); +char *lua_getobjname (lua_Object o, char **name); + +lua_Object lua_getlocal (lua_Function func, int local_number, char **name); +int lua_setlocal (lua_Function func, int local_number); + +extern lua_LHFunction lua_linehook; +extern lua_CHFunction lua_callhook; +extern int lua_debug; + +#endif diff --git a/lib/lua/include/lualib.h b/lib/lua/include/lualib.h new file mode 100644 index 0000000..4fb0ed2 --- /dev/null +++ b/lib/lua/include/lualib.h @@ -0,0 +1,38 @@ +/* +** Libraries to be used in LUA programs +** Grupo de Tecnologia em Computacao Grafica +** TeCGraf - PUC-Rio +** $Id: lualib.h,v 1.10 1996/08/05 20:55:24 roberto Exp $ +*/ + +#ifndef lualib_h +#define lualib_h + +#include "lua.h" + +void iolib_open (void); +void strlib_open (void); +void mathlib_open (void); + + +/* auxiliar functions (private) */ + +struct lua_reg { + char *name; + lua_CFunction func; +}; + +void luaI_openlib (struct lua_reg *l, int n); +void lua_arg_check(int cond, char *funcname); +char *lua_check_string (int numArg, char *funcname); +char *lua_opt_string (int numArg, char *def, char *funcname); +double lua_check_number (int numArg, char *funcname); +long lua_opt_number (int numArg, long def, char *funcname); +char *luaI_addchar (int c); +void luaI_addquoted (char *s); + +char *item_end (char *p); +int singlematch (int c, char *p); + +#endif + diff --git a/lib/lua/lapi.c b/lib/lua/lapi.c deleted file mode 100644 index 8bc2ddd..0000000 --- a/lib/lua/lapi.c +++ /dev/null @@ -1,1479 +0,0 @@ -/* -** $Id: lapi.c $ -** Lua API -** See Copyright Notice in lua.h -*/ - -#define lapi_c -#define LUA_CORE - -#include "lprefix.h" - - -#include -#include -#include - -#include "lua.h" - -#include "lapi.h" -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lgc.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" -#include "lundump.h" -#include "lvm.h" - - - -const char lua_ident[] = - "$LuaVersion: " LUA_COPYRIGHT " $" - "$LuaAuthors: " LUA_AUTHORS " $"; - - - -/* -** Test for a valid index (one that is not the 'nilvalue'). -*/ -#define isvalid(L, o) ((o) != &G(L)->nilvalue) - - -/* test for pseudo index */ -#define ispseudo(i) ((i) <= LUA_REGISTRYINDEX) - -/* test for upvalue */ -#define isupvalue(i) ((i) < LUA_REGISTRYINDEX) - - -/* -** Convert an acceptable index to a pointer to its respective value. -** Non-valid indices return the special nil value 'G(L)->nilvalue'. -*/ -static TValue *index2value (lua_State *L, int idx) { - CallInfo *ci = L->ci; - if (idx > 0) { - StkId o = ci->func.p + idx; - api_check(L, idx <= ci->top.p - (ci->func.p + 1), "unacceptable index"); - if (o >= L->top.p) return &G(L)->nilvalue; - else return s2v(o); - } - else if (!ispseudo(idx)) { /* negative index */ - api_check(L, idx != 0 && -idx <= L->top.p - (ci->func.p + 1), - "invalid index"); - return s2v(L->top.p + idx); - } - else if (idx == LUA_REGISTRYINDEX) - return &G(L)->l_registry; - else { /* upvalues */ - idx = LUA_REGISTRYINDEX - idx; - api_check(L, idx <= MAXUPVAL + 1, "upvalue index too large"); - if (ttisCclosure(s2v(ci->func.p))) { /* C closure? */ - CClosure *func = clCvalue(s2v(ci->func.p)); - return (idx <= func->nupvalues) ? &func->upvalue[idx-1] - : &G(L)->nilvalue; - } - else { /* light C function or Lua function (through a hook)?) */ - api_check(L, ttislcf(s2v(ci->func.p)), "caller not a C function"); - return &G(L)->nilvalue; /* no upvalues */ - } - } -} - - - -/* -** Convert a valid actual index (not a pseudo-index) to its address. -*/ -static StkId index2stack (lua_State *L, int idx) { - CallInfo *ci = L->ci; - if (idx > 0) { - StkId o = ci->func.p + idx; - api_check(L, o < L->top.p, "invalid index"); - return o; - } - else { /* non-positive index */ - api_check(L, idx != 0 && -idx <= L->top.p - (ci->func.p + 1), - "invalid index"); - api_check(L, !ispseudo(idx), "invalid index"); - return L->top.p + idx; - } -} - - -LUA_API int lua_checkstack (lua_State *L, int n) { - int res; - CallInfo *ci; - lua_lock(L); - ci = L->ci; - api_check(L, n >= 0, "negative 'n'"); - if (L->stack_last.p - L->top.p > n) /* stack large enough? */ - res = 1; /* yes; check is OK */ - else /* need to grow stack */ - res = luaD_growstack(L, n, 0); - if (res && ci->top.p < L->top.p + n) - ci->top.p = L->top.p + n; /* adjust frame top */ - lua_unlock(L); - return res; -} - - -LUA_API void lua_xmove (lua_State *from, lua_State *to, int n) { - int i; - if (from == to) return; - lua_lock(to); - api_checkpop(from, n); - api_check(from, G(from) == G(to), "moving among independent states"); - api_check(from, to->ci->top.p - to->top.p >= n, "stack overflow"); - from->top.p -= n; - for (i = 0; i < n; i++) { - setobjs2s(to, to->top.p, from->top.p + i); - to->top.p++; /* stack already checked by previous 'api_check' */ - } - lua_unlock(to); -} - - -LUA_API lua_CFunction lua_atpanic (lua_State *L, lua_CFunction panicf) { - lua_CFunction old; - lua_lock(L); - old = G(L)->panic; - G(L)->panic = panicf; - lua_unlock(L); - return old; -} - - -LUA_API lua_Number lua_version (lua_State *L) { - UNUSED(L); - return LUA_VERSION_NUM; -} - - - -/* -** basic stack manipulation -*/ - - -/* -** convert an acceptable stack index into an absolute index -*/ -LUA_API int lua_absindex (lua_State *L, int idx) { - return (idx > 0 || ispseudo(idx)) - ? idx - : cast_int(L->top.p - L->ci->func.p) + idx; -} - - -LUA_API int lua_gettop (lua_State *L) { - return cast_int(L->top.p - (L->ci->func.p + 1)); -} - - -LUA_API void lua_settop (lua_State *L, int idx) { - CallInfo *ci; - StkId func, newtop; - ptrdiff_t diff; /* difference for new top */ - lua_lock(L); - ci = L->ci; - func = ci->func.p; - if (idx >= 0) { - api_check(L, idx <= ci->top.p - (func + 1), "new top too large"); - diff = ((func + 1) + idx) - L->top.p; - for (; diff > 0; diff--) - setnilvalue2s(L->top.p++); /* clear new slots */ - } - else { - api_check(L, -(idx+1) <= (L->top.p - (func + 1)), "invalid new top"); - diff = idx + 1; /* will "subtract" index (as it is negative) */ - } - newtop = L->top.p + diff; - if (diff < 0 && L->tbclist.p >= newtop) { - lua_assert(ci->callstatus & CIST_TBC); - newtop = luaF_close(L, newtop, CLOSEKTOP, 0); - } - L->top.p = newtop; /* correct top only after closing any upvalue */ - lua_unlock(L); -} - - -LUA_API void lua_closeslot (lua_State *L, int idx) { - StkId level; - lua_lock(L); - level = index2stack(L, idx); - api_check(L, (L->ci->callstatus & CIST_TBC) && (L->tbclist.p == level), - "no variable to close at given level"); - level = luaF_close(L, level, CLOSEKTOP, 0); - setnilvalue2s(level); - lua_unlock(L); -} - - -/* -** Reverse the stack segment from 'from' to 'to' -** (auxiliary to 'lua_rotate') -** Note that we move(copy) only the value inside the stack. -** (We do not move additional fields that may exist.) -*/ -static void reverse (lua_State *L, StkId from, StkId to) { - for (; from < to; from++, to--) { - TValue temp; - setobj(L, &temp, s2v(from)); - setobjs2s(L, from, to); - setobj2s(L, to, &temp); - } -} - - -/* -** Let x = AB, where A is a prefix of length 'n'. Then, -** rotate x n == BA. But BA == (A^r . B^r)^r. -*/ -LUA_API void lua_rotate (lua_State *L, int idx, int n) { - StkId p, t, m; - lua_lock(L); - t = L->top.p - 1; /* end of stack segment being rotated */ - p = index2stack(L, idx); /* start of segment */ - api_check(L, L->tbclist.p < p, "moving a to-be-closed slot"); - api_check(L, (n >= 0 ? n : -n) <= (t - p + 1), "invalid 'n'"); - m = (n >= 0 ? t - n : p - n - 1); /* end of prefix */ - reverse(L, p, m); /* reverse the prefix with length 'n' */ - reverse(L, m + 1, t); /* reverse the suffix */ - reverse(L, p, t); /* reverse the entire segment */ - lua_unlock(L); -} - - -LUA_API void lua_copy (lua_State *L, int fromidx, int toidx) { - TValue *fr, *to; - lua_lock(L); - fr = index2value(L, fromidx); - to = index2value(L, toidx); - api_check(L, isvalid(L, to), "invalid index"); - setobj(L, to, fr); - if (isupvalue(toidx)) /* function upvalue? */ - luaC_barrier(L, clCvalue(s2v(L->ci->func.p)), fr); - /* LUA_REGISTRYINDEX does not need gc barrier - (collector revisits it before finishing collection) */ - lua_unlock(L); -} - - -LUA_API void lua_pushvalue (lua_State *L, int idx) { - lua_lock(L); - setobj2s(L, L->top.p, index2value(L, idx)); - api_incr_top(L); - lua_unlock(L); -} - - - -/* -** access functions (stack -> C) -*/ - - -LUA_API int lua_type (lua_State *L, int idx) { - const TValue *o = index2value(L, idx); - return (isvalid(L, o) ? ttype(o) : LUA_TNONE); -} - - -LUA_API const char *lua_typename (lua_State *L, int t) { - UNUSED(L); - api_check(L, LUA_TNONE <= t && t < LUA_NUMTYPES, "invalid type"); - return ttypename(t); -} - - -LUA_API int lua_iscfunction (lua_State *L, int idx) { - const TValue *o = index2value(L, idx); - return (ttislcf(o) || (ttisCclosure(o))); -} - - -LUA_API int lua_isinteger (lua_State *L, int idx) { - const TValue *o = index2value(L, idx); - return ttisinteger(o); -} - - -LUA_API int lua_isnumber (lua_State *L, int idx) { - lua_Number n; - const TValue *o = index2value(L, idx); - return tonumber(o, &n); -} - - -LUA_API int lua_isstring (lua_State *L, int idx) { - const TValue *o = index2value(L, idx); - return (ttisstring(o) || cvt2str(o)); -} - - -LUA_API int lua_isuserdata (lua_State *L, int idx) { - const TValue *o = index2value(L, idx); - return (ttisfulluserdata(o) || ttislightuserdata(o)); -} - - -LUA_API int lua_rawequal (lua_State *L, int index1, int index2) { - const TValue *o1 = index2value(L, index1); - const TValue *o2 = index2value(L, index2); - return (isvalid(L, o1) && isvalid(L, o2)) ? luaV_rawequalobj(o1, o2) : 0; -} - - -LUA_API void lua_arith (lua_State *L, int op) { - lua_lock(L); - if (op != LUA_OPUNM && op != LUA_OPBNOT) - api_checkpop(L, 2); /* all other operations expect two operands */ - else { /* for unary operations, add fake 2nd operand */ - api_checkpop(L, 1); - setobjs2s(L, L->top.p, L->top.p - 1); - api_incr_top(L); - } - /* first operand at top - 2, second at top - 1; result go to top - 2 */ - luaO_arith(L, op, s2v(L->top.p - 2), s2v(L->top.p - 1), L->top.p - 2); - L->top.p--; /* pop second operand */ - lua_unlock(L); -} - - -LUA_API int lua_compare (lua_State *L, int index1, int index2, int op) { - const TValue *o1; - const TValue *o2; - int i = 0; - lua_lock(L); /* may call tag method */ - o1 = index2value(L, index1); - o2 = index2value(L, index2); - if (isvalid(L, o1) && isvalid(L, o2)) { - switch (op) { - case LUA_OPEQ: i = luaV_equalobj(L, o1, o2); break; - case LUA_OPLT: i = luaV_lessthan(L, o1, o2); break; - case LUA_OPLE: i = luaV_lessequal(L, o1, o2); break; - default: api_check(L, 0, "invalid option"); - } - } - lua_unlock(L); - return i; -} - - -LUA_API unsigned lua_numbertocstring (lua_State *L, int idx, char *buff) { - const TValue *o = index2value(L, idx); - if (ttisnumber(o)) { - unsigned len = luaO_tostringbuff(o, buff); - buff[len++] = '\0'; /* add final zero */ - return len; - } - else - return 0; -} - - -LUA_API size_t lua_stringtonumber (lua_State *L, const char *s) { - size_t sz = luaO_str2num(s, s2v(L->top.p)); - if (sz != 0) - api_incr_top(L); - return sz; -} - - -LUA_API lua_Number lua_tonumberx (lua_State *L, int idx, int *pisnum) { - lua_Number n = 0; - const TValue *o = index2value(L, idx); - int isnum = tonumber(o, &n); - if (pisnum) - *pisnum = isnum; - return n; -} - - -LUA_API lua_Integer lua_tointegerx (lua_State *L, int idx, int *pisnum) { - lua_Integer res = 0; - const TValue *o = index2value(L, idx); - int isnum = tointeger(o, &res); - if (pisnum) - *pisnum = isnum; - return res; -} - - -LUA_API int lua_toboolean (lua_State *L, int idx) { - const TValue *o = index2value(L, idx); - return !l_isfalse(o); -} - - -LUA_API const char *lua_tolstring (lua_State *L, int idx, size_t *len) { - TValue *o; - lua_lock(L); - o = index2value(L, idx); - if (!ttisstring(o)) { - if (!cvt2str(o)) { /* not convertible? */ - if (len != NULL) *len = 0; - lua_unlock(L); - return NULL; - } - luaO_tostring(L, o); - luaC_checkGC(L); - o = index2value(L, idx); /* previous call may reallocate the stack */ - } - lua_unlock(L); - if (len != NULL) - return getlstr(tsvalue(o), *len); - else - return getstr(tsvalue(o)); -} - - -LUA_API lua_Unsigned lua_rawlen (lua_State *L, int idx) { - const TValue *o = index2value(L, idx); - switch (ttypetag(o)) { - case LUA_VSHRSTR: return cast(lua_Unsigned, tsvalue(o)->shrlen); - case LUA_VLNGSTR: return cast(lua_Unsigned, tsvalue(o)->u.lnglen); - case LUA_VUSERDATA: return cast(lua_Unsigned, uvalue(o)->len); - case LUA_VTABLE: { - lua_Unsigned res; - lua_lock(L); - res = luaH_getn(L, hvalue(o)); - lua_unlock(L); - return res; - } - default: return 0; - } -} - - -LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx) { - const TValue *o = index2value(L, idx); - if (ttislcf(o)) return fvalue(o); - else if (ttisCclosure(o)) - return clCvalue(o)->f; - else return NULL; /* not a C function */ -} - - -l_sinline void *touserdata (const TValue *o) { - switch (ttype(o)) { - case LUA_TUSERDATA: return getudatamem(uvalue(o)); - case LUA_TLIGHTUSERDATA: return pvalue(o); - default: return NULL; - } -} - - -LUA_API void *lua_touserdata (lua_State *L, int idx) { - const TValue *o = index2value(L, idx); - return touserdata(o); -} - - -LUA_API lua_State *lua_tothread (lua_State *L, int idx) { - const TValue *o = index2value(L, idx); - return (!ttisthread(o)) ? NULL : thvalue(o); -} - - -/* -** Returns a pointer to the internal representation of an object. -** Note that ISO C does not allow the conversion of a pointer to -** function to a 'void*', so the conversion here goes through -** a 'size_t'. (As the returned pointer is only informative, this -** conversion should not be a problem.) -*/ -LUA_API const void *lua_topointer (lua_State *L, int idx) { - const TValue *o = index2value(L, idx); - switch (ttypetag(o)) { - case LUA_VLCF: return cast_voidp(cast_sizet(fvalue(o))); - case LUA_VUSERDATA: case LUA_VLIGHTUSERDATA: - return touserdata(o); - default: { - if (iscollectable(o)) - return gcvalue(o); - else - return NULL; - } - } -} - - - -/* -** push functions (C -> stack) -*/ - - -LUA_API void lua_pushnil (lua_State *L) { - lua_lock(L); - setnilvalue2s(L->top.p); - api_incr_top(L); - lua_unlock(L); -} - - -LUA_API void lua_pushnumber (lua_State *L, lua_Number n) { - lua_lock(L); - setfltvalue(s2v(L->top.p), n); - api_incr_top(L); - lua_unlock(L); -} - - -LUA_API void lua_pushinteger (lua_State *L, lua_Integer n) { - lua_lock(L); - setivalue(s2v(L->top.p), n); - api_incr_top(L); - lua_unlock(L); -} - - -/* -** Pushes on the stack a string with given length. Avoid using 's' when -** 'len' == 0 (as 's' can be NULL in that case), due to later use of -** 'memcmp' and 'memcpy'. -*/ -LUA_API const char *lua_pushlstring (lua_State *L, const char *s, size_t len) { - TString *ts; - lua_lock(L); - ts = (len == 0) ? luaS_new(L, "") : luaS_newlstr(L, s, len); - setsvalue2s(L, L->top.p, ts); - api_incr_top(L); - luaC_checkGC(L); - lua_unlock(L); - return getstr(ts); -} - - -LUA_API const char *lua_pushexternalstring (lua_State *L, - const char *s, size_t len, lua_Alloc falloc, void *ud) { - TString *ts; - lua_lock(L); - api_check(L, len <= MAX_SIZE, "string too large"); - api_check(L, s[len] == '\0', "string not ending with zero"); - ts = luaS_newextlstr (L, s, len, falloc, ud); - setsvalue2s(L, L->top.p, ts); - api_incr_top(L); - luaC_checkGC(L); - lua_unlock(L); - return getstr(ts); -} - - -LUA_API const char *lua_pushstring (lua_State *L, const char *s) { - lua_lock(L); - if (s == NULL) - setnilvalue2s(L->top.p); - else { - TString *ts; - ts = luaS_new(L, s); - setsvalue2s(L, L->top.p, ts); - s = getstr(ts); /* internal copy's address */ - } - api_incr_top(L); - luaC_checkGC(L); - lua_unlock(L); - return s; -} - - -LUA_API const char *lua_pushvfstring (lua_State *L, const char *fmt, - va_list argp) { - const char *ret; - lua_lock(L); - ret = luaO_pushvfstring(L, fmt, argp); - luaC_checkGC(L); - lua_unlock(L); - return ret; -} - - -LUA_API const char *lua_pushfstring (lua_State *L, const char *fmt, ...) { - const char *ret; - va_list argp; - lua_lock(L); - pushvfstring(L, argp, fmt, ret); - luaC_checkGC(L); - lua_unlock(L); - return ret; -} - - -LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) { - lua_lock(L); - if (n == 0) { - setfvalue(s2v(L->top.p), fn); - api_incr_top(L); - } - else { - int i; - CClosure *cl; - api_checkpop(L, n); - api_check(L, n <= MAXUPVAL, "upvalue index too large"); - cl = luaF_newCclosure(L, n); - cl->f = fn; - for (i = 0; i < n; i++) { - setobj2n(L, &cl->upvalue[i], s2v(L->top.p - n + i)); - /* does not need barrier because closure is white */ - lua_assert(iswhite(cl)); - } - L->top.p -= n; - setclCvalue(L, s2v(L->top.p), cl); - api_incr_top(L); - luaC_checkGC(L); - } - lua_unlock(L); -} - - -LUA_API void lua_pushboolean (lua_State *L, int b) { - lua_lock(L); - if (b) - setbtvalue(s2v(L->top.p)); - else - setbfvalue(s2v(L->top.p)); - api_incr_top(L); - lua_unlock(L); -} - - -LUA_API void lua_pushlightuserdata (lua_State *L, void *p) { - lua_lock(L); - setpvalue(s2v(L->top.p), p); - api_incr_top(L); - lua_unlock(L); -} - - -LUA_API int lua_pushthread (lua_State *L) { - lua_lock(L); - setthvalue(L, s2v(L->top.p), L); - api_incr_top(L); - lua_unlock(L); - return (mainthread(G(L)) == L); -} - - - -/* -** get functions (Lua -> stack) -*/ - - -static int auxgetstr (lua_State *L, const TValue *t, const char *k) { - lu_byte tag; - TString *str = luaS_new(L, k); - luaV_fastget(t, str, s2v(L->top.p), luaH_getstr, tag); - if (!tagisempty(tag)) - api_incr_top(L); - else { - setsvalue2s(L, L->top.p, str); - api_incr_top(L); - tag = luaV_finishget(L, t, s2v(L->top.p - 1), L->top.p - 1, tag); - } - lua_unlock(L); - return novariant(tag); -} - - -/* -** The following function assumes that the registry cannot be a weak -** table; so, an emergency collection while using the global table -** cannot collect it. -*/ -static void getGlobalTable (lua_State *L, TValue *gt) { - Table *registry = hvalue(&G(L)->l_registry); - lu_byte tag = luaH_getint(registry, LUA_RIDX_GLOBALS, gt); - (void)tag; /* avoid not-used warnings when checks are off */ - api_check(L, novariant(tag) == LUA_TTABLE, "global table must exist"); -} - - -LUA_API int lua_getglobal (lua_State *L, const char *name) { - TValue gt; - lua_lock(L); - getGlobalTable(L, >); - return auxgetstr(L, >, name); -} - - -LUA_API int lua_gettable (lua_State *L, int idx) { - lu_byte tag; - TValue *t; - lua_lock(L); - api_checkpop(L, 1); - t = index2value(L, idx); - luaV_fastget(t, s2v(L->top.p - 1), s2v(L->top.p - 1), luaH_get, tag); - if (tagisempty(tag)) - tag = luaV_finishget(L, t, s2v(L->top.p - 1), L->top.p - 1, tag); - lua_unlock(L); - return novariant(tag); -} - - -LUA_API int lua_getfield (lua_State *L, int idx, const char *k) { - lua_lock(L); - return auxgetstr(L, index2value(L, idx), k); -} - - -LUA_API int lua_geti (lua_State *L, int idx, lua_Integer n) { - TValue *t; - lu_byte tag; - lua_lock(L); - t = index2value(L, idx); - luaV_fastgeti(t, n, s2v(L->top.p), tag); - if (tagisempty(tag)) { - TValue key; - setivalue(&key, n); - tag = luaV_finishget(L, t, &key, L->top.p, tag); - } - api_incr_top(L); - lua_unlock(L); - return novariant(tag); -} - - -static int finishrawget (lua_State *L, lu_byte tag) { - if (tagisempty(tag)) /* avoid copying empty items to the stack */ - setnilvalue2s(L->top.p); - api_incr_top(L); - lua_unlock(L); - return novariant(tag); -} - - -l_sinline Table *gettable (lua_State *L, int idx) { - TValue *t = index2value(L, idx); - api_check(L, ttistable(t), "table expected"); - return hvalue(t); -} - - -LUA_API int lua_rawget (lua_State *L, int idx) { - Table *t; - lu_byte tag; - lua_lock(L); - api_checkpop(L, 1); - t = gettable(L, idx); - tag = luaH_get(t, s2v(L->top.p - 1), s2v(L->top.p - 1)); - L->top.p--; /* pop key */ - return finishrawget(L, tag); -} - - -LUA_API int lua_rawgeti (lua_State *L, int idx, lua_Integer n) { - Table *t; - lu_byte tag; - lua_lock(L); - t = gettable(L, idx); - luaH_fastgeti(t, n, s2v(L->top.p), tag); - return finishrawget(L, tag); -} - - -LUA_API int lua_rawgetp (lua_State *L, int idx, const void *p) { - Table *t; - TValue k; - lua_lock(L); - t = gettable(L, idx); - setpvalue(&k, cast_voidp(p)); - return finishrawget(L, luaH_get(t, &k, s2v(L->top.p))); -} - - -LUA_API void lua_createtable (lua_State *L, int narray, int nrec) { - Table *t; - lua_lock(L); - t = luaH_new(L); - sethvalue2s(L, L->top.p, t); - api_incr_top(L); - if (narray > 0 || nrec > 0) - luaH_resize(L, t, cast_uint(narray), cast_uint(nrec)); - luaC_checkGC(L); - lua_unlock(L); -} - - -LUA_API int lua_getmetatable (lua_State *L, int objindex) { - const TValue *obj; - Table *mt; - int res = 0; - lua_lock(L); - obj = index2value(L, objindex); - switch (ttype(obj)) { - case LUA_TTABLE: - mt = hvalue(obj)->metatable; - break; - case LUA_TUSERDATA: - mt = uvalue(obj)->metatable; - break; - default: - mt = G(L)->mt[ttype(obj)]; - break; - } - if (mt != NULL) { - sethvalue2s(L, L->top.p, mt); - api_incr_top(L); - res = 1; - } - lua_unlock(L); - return res; -} - - -LUA_API int lua_getiuservalue (lua_State *L, int idx, int n) { - TValue *o; - int t; - lua_lock(L); - o = index2value(L, idx); - api_check(L, ttisfulluserdata(o), "full userdata expected"); - if (n <= 0 || n > uvalue(o)->nuvalue) { - setnilvalue2s(L->top.p); - t = LUA_TNONE; - } - else { - setobj2s(L, L->top.p, &uvalue(o)->uv[n - 1].uv); - t = ttype(s2v(L->top.p)); - } - api_incr_top(L); - lua_unlock(L); - return t; -} - - -/* -** set functions (stack -> Lua) -*/ - -/* -** t[k] = value at the top of the stack (where 'k' is a string) -*/ -static void auxsetstr (lua_State *L, const TValue *t, const char *k) { - int hres; - TString *str = luaS_new(L, k); - api_checkpop(L, 1); - luaV_fastset(t, str, s2v(L->top.p - 1), hres, luaH_psetstr); - if (hres == HOK) { - luaV_finishfastset(L, t, s2v(L->top.p - 1)); - L->top.p--; /* pop value */ - } - else { - setsvalue2s(L, L->top.p, str); /* push 'str' (to make it a TValue) */ - api_incr_top(L); - luaV_finishset(L, t, s2v(L->top.p - 1), s2v(L->top.p - 2), hres); - L->top.p -= 2; /* pop value and key */ - } - lua_unlock(L); /* lock done by caller */ -} - - -LUA_API void lua_setglobal (lua_State *L, const char *name) { - TValue gt; - lua_lock(L); /* unlock done in 'auxsetstr' */ - getGlobalTable(L, >); - auxsetstr(L, >, name); -} - - -LUA_API void lua_settable (lua_State *L, int idx) { - TValue *t; - int hres; - lua_lock(L); - api_checkpop(L, 2); - t = index2value(L, idx); - luaV_fastset(t, s2v(L->top.p - 2), s2v(L->top.p - 1), hres, luaH_pset); - if (hres == HOK) - luaV_finishfastset(L, t, s2v(L->top.p - 1)); - else - luaV_finishset(L, t, s2v(L->top.p - 2), s2v(L->top.p - 1), hres); - L->top.p -= 2; /* pop index and value */ - lua_unlock(L); -} - - -LUA_API void lua_setfield (lua_State *L, int idx, const char *k) { - lua_lock(L); /* unlock done in 'auxsetstr' */ - auxsetstr(L, index2value(L, idx), k); -} - - -LUA_API void lua_seti (lua_State *L, int idx, lua_Integer n) { - TValue *t; - int hres; - lua_lock(L); - api_checkpop(L, 1); - t = index2value(L, idx); - luaV_fastseti(t, n, s2v(L->top.p - 1), hres); - if (hres == HOK) - luaV_finishfastset(L, t, s2v(L->top.p - 1)); - else { - TValue temp; - setivalue(&temp, n); - luaV_finishset(L, t, &temp, s2v(L->top.p - 1), hres); - } - L->top.p--; /* pop value */ - lua_unlock(L); -} - - -static void aux_rawset (lua_State *L, int idx, TValue *key, int n) { - Table *t; - lua_lock(L); - api_checkpop(L, n); - t = gettable(L, idx); - luaH_set(L, t, key, s2v(L->top.p - 1)); - invalidateTMcache(t); - luaC_barrierback(L, obj2gco(t), s2v(L->top.p - 1)); - L->top.p -= n; - lua_unlock(L); -} - - -LUA_API void lua_rawset (lua_State *L, int idx) { - aux_rawset(L, idx, s2v(L->top.p - 2), 2); -} - - -LUA_API void lua_rawsetp (lua_State *L, int idx, const void *p) { - TValue k; - setpvalue(&k, cast_voidp(p)); - aux_rawset(L, idx, &k, 1); -} - - -LUA_API void lua_rawseti (lua_State *L, int idx, lua_Integer n) { - Table *t; - lua_lock(L); - api_checkpop(L, 1); - t = gettable(L, idx); - luaH_setint(L, t, n, s2v(L->top.p - 1)); - luaC_barrierback(L, obj2gco(t), s2v(L->top.p - 1)); - L->top.p--; - lua_unlock(L); -} - - -LUA_API int lua_setmetatable (lua_State *L, int objindex) { - TValue *obj; - Table *mt; - lua_lock(L); - api_checkpop(L, 1); - obj = index2value(L, objindex); - if (ttisnil(s2v(L->top.p - 1))) - mt = NULL; - else { - api_check(L, ttistable(s2v(L->top.p - 1)), "table expected"); - mt = hvalue(s2v(L->top.p - 1)); - } - switch (ttype(obj)) { - case LUA_TTABLE: { - hvalue(obj)->metatable = mt; - if (mt) { - luaC_objbarrier(L, gcvalue(obj), mt); - luaC_checkfinalizer(L, gcvalue(obj), mt); - } - break; - } - case LUA_TUSERDATA: { - uvalue(obj)->metatable = mt; - if (mt) { - luaC_objbarrier(L, uvalue(obj), mt); - luaC_checkfinalizer(L, gcvalue(obj), mt); - } - break; - } - default: { - G(L)->mt[ttype(obj)] = mt; - break; - } - } - L->top.p--; - lua_unlock(L); - return 1; -} - - -LUA_API int lua_setiuservalue (lua_State *L, int idx, int n) { - TValue *o; - int res; - lua_lock(L); - api_checkpop(L, 1); - o = index2value(L, idx); - api_check(L, ttisfulluserdata(o), "full userdata expected"); - if (!(cast_uint(n) - 1u < cast_uint(uvalue(o)->nuvalue))) - res = 0; /* 'n' not in [1, uvalue(o)->nuvalue] */ - else { - setobj(L, &uvalue(o)->uv[n - 1].uv, s2v(L->top.p - 1)); - luaC_barrierback(L, gcvalue(o), s2v(L->top.p - 1)); - res = 1; - } - L->top.p--; - lua_unlock(L); - return res; -} - - -/* -** 'load' and 'call' functions (run Lua code) -*/ - - -#define checkresults(L,na,nr) \ - (api_check(L, (nr) == LUA_MULTRET \ - || (L->ci->top.p - L->top.p >= (nr) - (na)), \ - "results from function overflow current stack size"), \ - api_check(L, LUA_MULTRET <= (nr) && (nr) <= MAXRESULTS, \ - "invalid number of results")) - - -LUA_API void lua_callk (lua_State *L, int nargs, int nresults, - lua_KContext ctx, lua_KFunction k) { - StkId func; - lua_lock(L); - api_check(L, k == NULL || !isLua(L->ci), - "cannot use continuations inside hooks"); - api_checkpop(L, nargs + 1); - api_check(L, L->status == LUA_OK, "cannot do calls on non-normal thread"); - checkresults(L, nargs, nresults); - func = L->top.p - (nargs+1); - if (k != NULL && yieldable(L)) { /* need to prepare continuation? */ - L->ci->u.c.k = k; /* save continuation */ - L->ci->u.c.ctx = ctx; /* save context */ - luaD_call(L, func, nresults); /* do the call */ - } - else /* no continuation or no yieldable */ - luaD_callnoyield(L, func, nresults); /* just do the call */ - adjustresults(L, nresults); - lua_unlock(L); -} - - - -/* -** Execute a protected call. -*/ -struct CallS { /* data to 'f_call' */ - StkId func; - int nresults; -}; - - -static void f_call (lua_State *L, void *ud) { - struct CallS *c = cast(struct CallS *, ud); - luaD_callnoyield(L, c->func, c->nresults); -} - - - -LUA_API int lua_pcallk (lua_State *L, int nargs, int nresults, int errfunc, - lua_KContext ctx, lua_KFunction k) { - struct CallS c; - TStatus status; - ptrdiff_t func; - lua_lock(L); - api_check(L, k == NULL || !isLua(L->ci), - "cannot use continuations inside hooks"); - api_checkpop(L, nargs + 1); - api_check(L, L->status == LUA_OK, "cannot do calls on non-normal thread"); - checkresults(L, nargs, nresults); - if (errfunc == 0) - func = 0; - else { - StkId o = index2stack(L, errfunc); - api_check(L, ttisfunction(s2v(o)), "error handler must be a function"); - func = savestack(L, o); - } - c.func = L->top.p - (nargs+1); /* function to be called */ - if (k == NULL || !yieldable(L)) { /* no continuation or no yieldable? */ - c.nresults = nresults; /* do a 'conventional' protected call */ - status = luaD_pcall(L, f_call, &c, savestack(L, c.func), func); - } - else { /* prepare continuation (call is already protected by 'resume') */ - CallInfo *ci = L->ci; - ci->u.c.k = k; /* save continuation */ - ci->u.c.ctx = ctx; /* save context */ - /* save information for error recovery */ - ci->u2.funcidx = cast_int(savestack(L, c.func)); - ci->u.c.old_errfunc = L->errfunc; - L->errfunc = func; - setoah(ci, L->allowhook); /* save value of 'allowhook' */ - ci->callstatus |= CIST_YPCALL; /* function can do error recovery */ - luaD_call(L, c.func, nresults); /* do the call */ - ci->callstatus &= ~CIST_YPCALL; - L->errfunc = ci->u.c.old_errfunc; - status = LUA_OK; /* if it is here, there were no errors */ - } - adjustresults(L, nresults); - lua_unlock(L); - return APIstatus(status); -} - - -LUA_API int lua_load (lua_State *L, lua_Reader reader, void *data, - const char *chunkname, const char *mode) { - ZIO z; - TStatus status; - lua_lock(L); - luaC_checkGC(L); - if (!chunkname) chunkname = "?"; - luaZ_init(L, &z, reader, data); - status = luaD_protectedparser(L, &z, chunkname, mode); - if (status == LUA_OK) { /* no errors? */ - LClosure *f = clLvalue(s2v(L->top.p - 1)); /* get new function */ - if (f->nupvalues >= 1) { /* does it have an upvalue? */ - /* get global table from registry */ - TValue gt; - getGlobalTable(L, >); - /* set global table as 1st upvalue of 'f' (may be LUA_ENV) */ - setobj(L, f->upvals[0]->v.p, >); - luaC_barrier(L, f->upvals[0], >); - } - } - lua_unlock(L); - return APIstatus(status); -} - - -/* -** Dump a Lua function, calling 'writer' to write its parts. Ensure -** the stack returns with its original size. -*/ -LUA_API int lua_dump (lua_State *L, lua_Writer writer, void *data, int strip) { - int status; - ptrdiff_t otop = savestack(L, L->top.p); /* original top */ - TValue *f = s2v(L->top.p - 1); /* function to be dumped */ - lua_lock(L); - api_checkpop(L, 1); - api_check(L, isLfunction(f), "Lua function expected"); - status = luaU_dump(L, clLvalue(f)->p, writer, data, strip); - L->top.p = restorestack(L, otop); /* restore top */ - lua_unlock(L); - return status; -} - - -LUA_API int lua_status (lua_State *L) { - return APIstatus(L->status); -} - - -/* -** Garbage-collection function -*/ -LUA_API int lua_gc (lua_State *L, int what, ...) { - va_list argp; - int res = 0; - global_State *g = G(L); - if (g->gcstp & (GCSTPGC | GCSTPCLS)) /* internal stop? */ - return -1; /* all options are invalid when stopped */ - lua_lock(L); - va_start(argp, what); - switch (what) { - case LUA_GCSTOP: { - g->gcstp = GCSTPUSR; /* stopped by the user */ - break; - } - case LUA_GCRESTART: { - luaE_setdebt(g, 0); - g->gcstp = 0; /* (other bits must be zero here) */ - break; - } - case LUA_GCCOLLECT: { - luaC_fullgc(L, 0); - break; - } - case LUA_GCCOUNT: { - /* GC values are expressed in Kbytes: #bytes/2^10 */ - res = cast_int(gettotalbytes(g) >> 10); - break; - } - case LUA_GCCOUNTB: { - res = cast_int(gettotalbytes(g) & 0x3ff); - break; - } - case LUA_GCSTEP: { - lu_byte oldstp = g->gcstp; - l_mem n = cast(l_mem, va_arg(argp, size_t)); - l_mem newdebt; - int work = 0; /* true if GC did some work */ - g->gcstp = 0; /* allow GC to run (other bits must be zero here) */ - if (n <= 0) - newdebt = 0; /* force to run one basic step */ - else if (g->GCdebt >= n - MAX_LMEM) /* no overflow? */ - newdebt = g->GCdebt - n; - else /* overflow */ - newdebt = -MAX_LMEM; /* set debt to mininum value */ - luaE_setdebt(g, newdebt); - luaC_condGC(L, (void)0, work = 1); - if (work && g->gcstate == GCSpause) /* end of cycle? */ - res = 1; /* signal it */ - g->gcstp = oldstp; /* restore previous state */ - break; - } - case LUA_GCISRUNNING: { - res = gcrunning(g); - break; - } - case LUA_GCGEN: { - res = (g->gckind == KGC_INC) ? LUA_GCINC : LUA_GCGEN; - luaC_changemode(L, KGC_GENMINOR); - break; - } - case LUA_GCINC: { - res = (g->gckind == KGC_INC) ? LUA_GCINC : LUA_GCGEN; - luaC_changemode(L, KGC_INC); - break; - } - case LUA_GCPARAM: { - int param = va_arg(argp, int); - int value = va_arg(argp, int); - api_check(L, 0 <= param && param < LUA_GCPN, "invalid parameter"); - res = cast_int(luaO_applyparam(g->gcparams[param], 100)); - if (value >= 0) - g->gcparams[param] = luaO_codeparam(cast_uint(value)); - break; - } - default: res = -1; /* invalid option */ - } - va_end(argp); - lua_unlock(L); - return res; -} - - - -/* -** miscellaneous functions -*/ - - -LUA_API int lua_error (lua_State *L) { - TValue *errobj; - lua_lock(L); - errobj = s2v(L->top.p - 1); - api_checkpop(L, 1); - /* error object is the memory error message? */ - if (ttisshrstring(errobj) && eqshrstr(tsvalue(errobj), G(L)->memerrmsg)) - luaM_error(L); /* raise a memory error */ - else - luaG_errormsg(L); /* raise a regular error */ - /* code unreachable; will unlock when control actually leaves the kernel */ - return 0; /* to avoid warnings */ -} - - -LUA_API int lua_next (lua_State *L, int idx) { - Table *t; - int more; - lua_lock(L); - api_checkpop(L, 1); - t = gettable(L, idx); - more = luaH_next(L, t, L->top.p - 1); - if (more) - api_incr_top(L); - else /* no more elements */ - L->top.p--; /* pop key */ - lua_unlock(L); - return more; -} - - -LUA_API void lua_toclose (lua_State *L, int idx) { - StkId o; - lua_lock(L); - o = index2stack(L, idx); - api_check(L, L->tbclist.p < o, "given index below or equal a marked one"); - luaF_newtbcupval(L, o); /* create new to-be-closed upvalue */ - L->ci->callstatus |= CIST_TBC; /* mark that function has TBC slots */ - lua_unlock(L); -} - - -LUA_API void lua_concat (lua_State *L, int n) { - lua_lock(L); - if (n > 0) { - api_checkpop(L, n); - luaV_concat(L, n); - luaC_checkGC(L); - } - else { /* nothing to concatenate */ - setsvalue2s(L, L->top.p, luaS_newlstr(L, "", 0)); /* push empty string */ - api_incr_top(L); - } - lua_unlock(L); -} - - -LUA_API void lua_len (lua_State *L, int idx) { - TValue *t; - lua_lock(L); - t = index2value(L, idx); - luaV_objlen(L, L->top.p, t); - api_incr_top(L); - lua_unlock(L); -} - - -LUA_API lua_Alloc lua_getallocf (lua_State *L, void **ud) { - lua_Alloc f; - lua_lock(L); - if (ud) *ud = G(L)->ud; - f = G(L)->frealloc; - lua_unlock(L); - return f; -} - - -LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud) { - lua_lock(L); - G(L)->ud = ud; - G(L)->frealloc = f; - lua_unlock(L); -} - - -void lua_setwarnf (lua_State *L, lua_WarnFunction f, void *ud) { - lua_lock(L); - G(L)->ud_warn = ud; - G(L)->warnf = f; - lua_unlock(L); -} - - -void lua_warning (lua_State *L, const char *msg, int tocont) { - lua_lock(L); - luaE_warning(L, msg, tocont); - lua_unlock(L); -} - - - -LUA_API void *lua_newuserdatauv (lua_State *L, size_t size, int nuvalue) { - Udata *u; - lua_lock(L); - api_check(L, 0 <= nuvalue && nuvalue < SHRT_MAX, "invalid value"); - u = luaS_newudata(L, size, cast(unsigned short, nuvalue)); - setuvalue(L, s2v(L->top.p), u); - api_incr_top(L); - luaC_checkGC(L); - lua_unlock(L); - return getudatamem(u); -} - - - -static const char *aux_upvalue (TValue *fi, int n, TValue **val, - GCObject **owner) { - switch (ttypetag(fi)) { - case LUA_VCCL: { /* C closure */ - CClosure *f = clCvalue(fi); - if (!(cast_uint(n) - 1u < cast_uint(f->nupvalues))) - return NULL; /* 'n' not in [1, f->nupvalues] */ - *val = &f->upvalue[n-1]; - if (owner) *owner = obj2gco(f); - return ""; - } - case LUA_VLCL: { /* Lua closure */ - LClosure *f = clLvalue(fi); - TString *name; - Proto *p = f->p; - if (!(cast_uint(n) - 1u < cast_uint(p->sizeupvalues))) - return NULL; /* 'n' not in [1, p->sizeupvalues] */ - *val = f->upvals[n-1]->v.p; - if (owner) *owner = obj2gco(f->upvals[n - 1]); - name = p->upvalues[n-1].name; - return (name == NULL) ? "(no name)" : getstr(name); - } - default: return NULL; /* not a closure */ - } -} - - -LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n) { - const char *name; - TValue *val = NULL; /* to avoid warnings */ - lua_lock(L); - name = aux_upvalue(index2value(L, funcindex), n, &val, NULL); - if (name) { - setobj2s(L, L->top.p, val); - api_incr_top(L); - } - lua_unlock(L); - return name; -} - - -LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) { - const char *name; - TValue *val = NULL; /* to avoid warnings */ - GCObject *owner = NULL; /* to avoid warnings */ - TValue *fi; - lua_lock(L); - fi = index2value(L, funcindex); - api_checkpop(L, 1); - name = aux_upvalue(fi, n, &val, &owner); - if (name) { - L->top.p--; - setobj(L, val, s2v(L->top.p)); - luaC_barrier(L, owner, val); - } - lua_unlock(L); - return name; -} - - -static UpVal **getupvalref (lua_State *L, int fidx, int n, LClosure **pf) { - static const UpVal *const nullup = NULL; - LClosure *f; - TValue *fi = index2value(L, fidx); - api_check(L, ttisLclosure(fi), "Lua function expected"); - f = clLvalue(fi); - if (pf) *pf = f; - if (1 <= n && n <= f->p->sizeupvalues) - return &f->upvals[n - 1]; /* get its upvalue pointer */ - else - return (UpVal**)&nullup; -} - - -LUA_API void *lua_upvalueid (lua_State *L, int fidx, int n) { - TValue *fi = index2value(L, fidx); - switch (ttypetag(fi)) { - case LUA_VLCL: { /* lua closure */ - return *getupvalref(L, fidx, n, NULL); - } - case LUA_VCCL: { /* C closure */ - CClosure *f = clCvalue(fi); - if (1 <= n && n <= f->nupvalues) - return &f->upvalue[n - 1]; - /* else */ - } /* FALLTHROUGH */ - case LUA_VLCF: - return NULL; /* light C functions have no upvalues */ - default: { - api_check(L, 0, "function expected"); - return NULL; - } - } -} - - -LUA_API void lua_upvaluejoin (lua_State *L, int fidx1, int n1, - int fidx2, int n2) { - LClosure *f1; - UpVal **up1 = getupvalref(L, fidx1, n1, &f1); - UpVal **up2 = getupvalref(L, fidx2, n2, NULL); - api_check(L, *up1 != NULL && *up2 != NULL, "invalid upvalue index"); - *up1 = *up2; - luaC_objbarrier(L, f1, *up1); -} - - diff --git a/lib/lua/lapi.h b/lib/lua/lapi.h deleted file mode 100644 index 9b54534..0000000 --- a/lib/lua/lapi.h +++ /dev/null @@ -1,65 +0,0 @@ -/* -** $Id: lapi.h $ -** Auxiliary functions from Lua API -** See Copyright Notice in lua.h -*/ - -#ifndef lapi_h -#define lapi_h - - -#include "llimits.h" -#include "lstate.h" - - -#if defined(LUA_USE_APICHECK) -#include -#define api_check(l,e,msg) assert(e) -#else /* for testing */ -#define api_check(l,e,msg) ((void)(l), lua_assert((e) && msg)) -#endif - - - -/* Increments 'L->top.p', checking for stack overflows */ -#define api_incr_top(L) \ - (L->top.p++, api_check(L, L->top.p <= L->ci->top.p, "stack overflow")) - - -/* -** macros that are executed whenever program enters the Lua core -** ('lua_lock') and leaves the core ('lua_unlock') -*/ -#if !defined(lua_lock) -#define lua_lock(L) ((void) 0) -#define lua_unlock(L) ((void) 0) -#endif - - - -/* -** If a call returns too many multiple returns, the callee may not have -** stack space to accommodate all results. In this case, this macro -** increases its stack space ('L->ci->top.p'). -*/ -#define adjustresults(L,nres) \ - { if ((nres) <= LUA_MULTRET && L->ci->top.p < L->top.p) \ - L->ci->top.p = L->top.p; } - - -/* Ensure the stack has at least 'n' elements */ -#define api_checknelems(L,n) \ - api_check(L, (n) < (L->top.p - L->ci->func.p), \ - "not enough elements in the stack") - - -/* Ensure the stack has at least 'n' elements to be popped. (Some -** functions only update a slot after checking it for popping, but that -** is only an optimization for a pop followed by a push.) -*/ -#define api_checkpop(L,n) \ - api_check(L, (n) < L->top.p - L->ci->func.p && \ - L->tbclist.p < L->top.p - (n), \ - "not enough free elements in the stack") - -#endif diff --git a/lib/lua/lauxlib.c b/lib/lua/lauxlib.c deleted file mode 100644 index 8620c8b..0000000 --- a/lib/lua/lauxlib.c +++ /dev/null @@ -1,1215 +0,0 @@ -/* -** $Id: lauxlib.c $ -** Auxiliary functions for building Lua libraries -** See Copyright Notice in lua.h -*/ - -#define lauxlib_c -#define LUA_LIB - -#include "lprefix.h" - - -#include -#include -#include -#include -#include - - -/* -** This file uses only the official API of Lua. -** Any function declared here could be written as an application function. -*/ - -#include "lua.h" - -#include "lauxlib.h" -#include "llimits.h" - - -/* -** {====================================================== -** Traceback -** ======================================================= -*/ - - -#define LEVELS1 10 /* size of the first part of the stack */ -#define LEVELS2 11 /* size of the second part of the stack */ - - - -/* -** Search for 'objidx' in table at index -1. ('objidx' must be an -** absolute index.) Return 1 + string at top if it found a good name. -*/ -static int findfield (lua_State *L, int objidx, int level) { - if (level == 0 || !lua_istable(L, -1)) - return 0; /* not found */ - lua_pushnil(L); /* start 'next' loop */ - while (lua_next(L, -2)) { /* for each pair in table */ - if (lua_type(L, -2) == LUA_TSTRING) { /* ignore non-string keys */ - if (lua_rawequal(L, objidx, -1)) { /* found object? */ - lua_pop(L, 1); /* remove value (but keep name) */ - return 1; - } - else if (findfield(L, objidx, level - 1)) { /* try recursively */ - /* stack: lib_name, lib_table, field_name (top) */ - lua_pushliteral(L, "."); /* place '.' between the two names */ - lua_replace(L, -3); /* (in the slot occupied by table) */ - lua_concat(L, 3); /* lib_name.field_name */ - return 1; - } - } - lua_pop(L, 1); /* remove value */ - } - return 0; /* not found */ -} - - -/* -** Search for a name for a function in all loaded modules -*/ -static int pushglobalfuncname (lua_State *L, lua_Debug *ar) { - int top = lua_gettop(L); - lua_getinfo(L, "f", ar); /* push function */ - lua_getfield(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE); - luaL_checkstack(L, 6, "not enough stack"); /* slots for 'findfield' */ - if (findfield(L, top + 1, 2)) { - const char *name = lua_tostring(L, -1); - if (strncmp(name, LUA_GNAME ".", 3) == 0) { /* name start with '_G.'? */ - lua_pushstring(L, name + 3); /* push name without prefix */ - lua_remove(L, -2); /* remove original name */ - } - lua_copy(L, -1, top + 1); /* copy name to proper place */ - lua_settop(L, top + 1); /* remove table "loaded" and name copy */ - return 1; - } - else { - lua_settop(L, top); /* remove function and global table */ - return 0; - } -} - - -static void pushfuncname (lua_State *L, lua_Debug *ar) { - if (*ar->namewhat != '\0') /* is there a name from code? */ - lua_pushfstring(L, "%s '%s'", ar->namewhat, ar->name); /* use it */ - else if (*ar->what == 'm') /* main? */ - lua_pushliteral(L, "main chunk"); - else if (pushglobalfuncname(L, ar)) { /* try a global name */ - lua_pushfstring(L, "function '%s'", lua_tostring(L, -1)); - lua_remove(L, -2); /* remove name */ - } - else if (*ar->what != 'C') /* for Lua functions, use */ - lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined); - else /* nothing left... */ - lua_pushliteral(L, "?"); -} - - -static int lastlevel (lua_State *L) { - lua_Debug ar; - int li = 1, le = 1; - /* find an upper bound */ - while (lua_getstack(L, le, &ar)) { li = le; le *= 2; } - /* do a binary search */ - while (li < le) { - int m = (li + le)/2; - if (lua_getstack(L, m, &ar)) li = m + 1; - else le = m; - } - return le - 1; -} - - -LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1, - const char *msg, int level) { - luaL_Buffer b; - lua_Debug ar; - int last = lastlevel(L1); - int limit2show = (last - level > LEVELS1 + LEVELS2) ? LEVELS1 : -1; - luaL_buffinit(L, &b); - if (msg) { - luaL_addstring(&b, msg); - luaL_addchar(&b, '\n'); - } - luaL_addstring(&b, "stack traceback:"); - while (lua_getstack(L1, level++, &ar)) { - if (limit2show-- == 0) { /* too many levels? */ - int n = last - level - LEVELS2 + 1; /* number of levels to skip */ - lua_pushfstring(L, "\n\t...\t(skipping %d levels)", n); - luaL_addvalue(&b); /* add warning about skip */ - level += n; /* and skip to last levels */ - } - else { - lua_getinfo(L1, "Slnt", &ar); - if (ar.currentline <= 0) - lua_pushfstring(L, "\n\t%s: in ", ar.short_src); - else - lua_pushfstring(L, "\n\t%s:%d: in ", ar.short_src, ar.currentline); - luaL_addvalue(&b); - pushfuncname(L, &ar); - luaL_addvalue(&b); - if (ar.istailcall) - luaL_addstring(&b, "\n\t(...tail calls...)"); - } - } - luaL_pushresult(&b); -} - -/* }====================================================== */ - - -/* -** {====================================================== -** Error-report functions -** ======================================================= -*/ - -LUALIB_API int luaL_argerror (lua_State *L, int arg, const char *extramsg) { - lua_Debug ar; - const char *argword; - if (!lua_getstack(L, 0, &ar)) /* no stack frame? */ - return luaL_error(L, "bad argument #%d (%s)", arg, extramsg); - lua_getinfo(L, "nt", &ar); - if (arg <= ar.extraargs) /* error in an extra argument? */ - argword = "extra argument"; - else { - arg -= ar.extraargs; /* do not count extra arguments */ - if (strcmp(ar.namewhat, "method") == 0) { /* colon syntax? */ - arg--; /* do not count (extra) self argument */ - if (arg == 0) /* error in self argument? */ - return luaL_error(L, "calling '%s' on bad self (%s)", - ar.name, extramsg); - /* else go through; error in a regular argument */ - } - argword = "argument"; - } - if (ar.name == NULL) - ar.name = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?"; - return luaL_error(L, "bad %s #%d to '%s' (%s)", - argword, arg, ar.name, extramsg); -} - - -LUALIB_API int luaL_typeerror (lua_State *L, int arg, const char *tname) { - const char *msg; - const char *typearg; /* name for the type of the actual argument */ - if (luaL_getmetafield(L, arg, "__name") == LUA_TSTRING) - typearg = lua_tostring(L, -1); /* use the given type name */ - else if (lua_type(L, arg) == LUA_TLIGHTUSERDATA) - typearg = "light userdata"; /* special name for messages */ - else - typearg = luaL_typename(L, arg); /* standard name */ - msg = lua_pushfstring(L, "%s expected, got %s", tname, typearg); - return luaL_argerror(L, arg, msg); -} - - -static void tag_error (lua_State *L, int arg, int tag) { - luaL_typeerror(L, arg, lua_typename(L, tag)); -} - - -/* -** The use of 'lua_pushfstring' ensures this function does not -** need reserved stack space when called. -*/ -LUALIB_API void luaL_where (lua_State *L, int level) { - lua_Debug ar; - if (lua_getstack(L, level, &ar)) { /* check function at level */ - lua_getinfo(L, "Sl", &ar); /* get info about it */ - if (ar.currentline > 0) { /* is there info? */ - lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline); - return; - } - } - lua_pushfstring(L, ""); /* else, no information available... */ -} - - -/* -** Again, the use of 'lua_pushvfstring' ensures this function does -** not need reserved stack space when called. (At worst, it generates -** a memory error instead of the given message.) -*/ -LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) { - va_list argp; - va_start(argp, fmt); - luaL_where(L, 1); - lua_pushvfstring(L, fmt, argp); - va_end(argp); - lua_concat(L, 2); - return lua_error(L); -} - - -LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) { - int en = errno; /* calls to Lua API may change this value */ - if (stat) { - lua_pushboolean(L, 1); - return 1; - } - else { - const char *msg; - luaL_pushfail(L); - msg = (en != 0) ? strerror(en) : "(no extra info)"; - if (fname) - lua_pushfstring(L, "%s: %s", fname, msg); - else - lua_pushstring(L, msg); - lua_pushinteger(L, en); - return 3; - } -} - - -#if !defined(l_inspectstat) /* { */ - -#if defined(LUA_USE_POSIX) - -#include - -/* -** use appropriate macros to interpret 'pclose' return status -*/ -#define l_inspectstat(stat,what) \ - if (WIFEXITED(stat)) { stat = WEXITSTATUS(stat); } \ - else if (WIFSIGNALED(stat)) { stat = WTERMSIG(stat); what = "signal"; } - -#else - -#define l_inspectstat(stat,what) /* no op */ - -#endif - -#endif /* } */ - - -LUALIB_API int luaL_execresult (lua_State *L, int stat) { - if (stat != 0 && errno != 0) /* error with an 'errno'? */ - return luaL_fileresult(L, 0, NULL); - else { - const char *what = "exit"; /* type of termination */ - l_inspectstat(stat, what); /* interpret result */ - if (*what == 'e' && stat == 0) /* successful termination? */ - lua_pushboolean(L, 1); - else - luaL_pushfail(L); - lua_pushstring(L, what); - lua_pushinteger(L, stat); - return 3; /* return true/fail,what,code */ - } -} - -/* }====================================================== */ - - - -/* -** {====================================================== -** Userdata's metatable manipulation -** ======================================================= -*/ - -LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) { - if (luaL_getmetatable(L, tname) != LUA_TNIL) /* name already in use? */ - return 0; /* leave previous value on top, but return 0 */ - lua_pop(L, 1); - lua_createtable(L, 0, 2); /* create metatable */ - lua_pushstring(L, tname); - lua_setfield(L, -2, "__name"); /* metatable.__name = tname */ - lua_pushvalue(L, -1); - lua_setfield(L, LUA_REGISTRYINDEX, tname); /* registry.name = metatable */ - return 1; -} - - -LUALIB_API void luaL_setmetatable (lua_State *L, const char *tname) { - luaL_getmetatable(L, tname); - lua_setmetatable(L, -2); -} - - -LUALIB_API void *luaL_testudata (lua_State *L, int ud, const char *tname) { - void *p = lua_touserdata(L, ud); - if (p != NULL) { /* value is a userdata? */ - if (lua_getmetatable(L, ud)) { /* does it have a metatable? */ - luaL_getmetatable(L, tname); /* get correct metatable */ - if (!lua_rawequal(L, -1, -2)) /* not the same? */ - p = NULL; /* value is a userdata with wrong metatable */ - lua_pop(L, 2); /* remove both metatables */ - return p; - } - } - return NULL; /* value is not a userdata with a metatable */ -} - - -LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) { - void *p = luaL_testudata(L, ud, tname); - luaL_argexpected(L, p != NULL, ud, tname); - return p; -} - -/* }====================================================== */ - - -/* -** {====================================================== -** Argument check functions -** ======================================================= -*/ - -LUALIB_API int luaL_checkoption (lua_State *L, int arg, const char *def, - const char *const lst[]) { - const char *name = (def) ? luaL_optstring(L, arg, def) : - luaL_checkstring(L, arg); - int i; - for (i=0; lst[i]; i++) - if (strcmp(lst[i], name) == 0) - return i; - return luaL_argerror(L, arg, - lua_pushfstring(L, "invalid option '%s'", name)); -} - - -/* -** Ensures the stack has at least 'space' extra slots, raising an error -** if it cannot fulfill the request. (The error handling needs a few -** extra slots to format the error message. In case of an error without -** this extra space, Lua will generate the same 'stack overflow' error, -** but without 'msg'.) -*/ -LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) { - if (l_unlikely(!lua_checkstack(L, space))) { - if (msg) - luaL_error(L, "stack overflow (%s)", msg); - else - luaL_error(L, "stack overflow"); - } -} - - -LUALIB_API void luaL_checktype (lua_State *L, int arg, int t) { - if (l_unlikely(lua_type(L, arg) != t)) - tag_error(L, arg, t); -} - - -LUALIB_API void luaL_checkany (lua_State *L, int arg) { - if (l_unlikely(lua_type(L, arg) == LUA_TNONE)) - luaL_argerror(L, arg, "value expected"); -} - - -LUALIB_API const char *luaL_checklstring (lua_State *L, int arg, size_t *len) { - const char *s = lua_tolstring(L, arg, len); - if (l_unlikely(!s)) tag_error(L, arg, LUA_TSTRING); - return s; -} - - -LUALIB_API const char *luaL_optlstring (lua_State *L, int arg, - const char *def, size_t *len) { - if (lua_isnoneornil(L, arg)) { - if (len) - *len = (def ? strlen(def) : 0); - return def; - } - else return luaL_checklstring(L, arg, len); -} - - -LUALIB_API lua_Number luaL_checknumber (lua_State *L, int arg) { - int isnum; - lua_Number d = lua_tonumberx(L, arg, &isnum); - if (l_unlikely(!isnum)) - tag_error(L, arg, LUA_TNUMBER); - return d; -} - - -LUALIB_API lua_Number luaL_optnumber (lua_State *L, int arg, lua_Number def) { - return luaL_opt(L, luaL_checknumber, arg, def); -} - - -static void interror (lua_State *L, int arg) { - if (lua_isnumber(L, arg)) - luaL_argerror(L, arg, "number has no integer representation"); - else - tag_error(L, arg, LUA_TNUMBER); -} - - -LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int arg) { - int isnum; - lua_Integer d = lua_tointegerx(L, arg, &isnum); - if (l_unlikely(!isnum)) { - interror(L, arg); - } - return d; -} - - -LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int arg, - lua_Integer def) { - return luaL_opt(L, luaL_checkinteger, arg, def); -} - -/* }====================================================== */ - - -/* -** {====================================================== -** Generic Buffer manipulation -** ======================================================= -*/ - -/* userdata to box arbitrary data */ -typedef struct UBox { - void *box; - size_t bsize; -} UBox; - - -/* Resize the buffer used by a box. Optimize for the common case of -** resizing to the old size. (For instance, __gc will resize the box -** to 0 even after it was closed. 'pushresult' may also resize it to a -** final size that is equal to the one set when the buffer was created.) -*/ -static void *resizebox (lua_State *L, int idx, size_t newsize) { - UBox *box = (UBox *)lua_touserdata(L, idx); - if (box->bsize == newsize) /* not changing size? */ - return box->box; /* keep the buffer */ - else { - void *ud; - lua_Alloc allocf = lua_getallocf(L, &ud); - void *temp = allocf(ud, box->box, box->bsize, newsize); - if (l_unlikely(temp == NULL && newsize > 0)) { /* allocation error? */ - lua_pushliteral(L, "not enough memory"); - lua_error(L); /* raise a memory error */ - } - box->box = temp; - box->bsize = newsize; - return temp; - } -} - - -static int boxgc (lua_State *L) { - resizebox(L, 1, 0); - return 0; -} - - -static const luaL_Reg boxmt[] = { /* box metamethods */ - {"__gc", boxgc}, - {"__close", boxgc}, - {NULL, NULL} -}; - - -/* -** Get/create metatable (MT) for boxes -*/ -static void getBoxMT (lua_State *L) { - const char *BOXMT = "_UBOX*"; /* key for the metatable */ - if (luaL_getmetatable(L, BOXMT) == LUA_TNIL) { /* MT not created yet? */ - luaL_newlibtable(L, boxmt); /* create it */ - luaL_setfuncs(L, boxmt, 0); /* initialize it */ - lua_copy(L, -1, -2); /* change stack from nil,MT to MT,MT */ - lua_setfield(L, LUA_REGISTRYINDEX, BOXMT); /* store MT in the registry */ - } -} - - -static void newbox (lua_State *L) { - UBox *box = (UBox *)lua_newuserdatauv(L, sizeof(UBox), 0); - box->box = NULL; - box->bsize = 0; - getBoxMT(L); - lua_setmetatable(L, -2); -} - - -/* -** check whether buffer is using a userdata on the stack as a temporary -** buffer -*/ -#define buffonstack(B) ((B)->b != (B)->init.b) - - -/* -** Whenever buffer is accessed, slot 'idx' must either be a box (which -** cannot be NULL) or it is a placeholder for the buffer. -*/ -#define checkbufferlevel(B,idx) \ - lua_assert(buffonstack(B) ? lua_touserdata(B->L, idx) != NULL \ - : lua_touserdata(B->L, idx) == (void*)B) - - -/* -** Compute new size for buffer 'B', enough to accommodate extra 'sz' -** bytes plus one for a terminating zero. -*/ -static size_t newbuffsize (luaL_Buffer *B, size_t sz) { - size_t newsize = B->size; - if (l_unlikely(sz >= MAX_SIZE - B->n)) - return cast_sizet(luaL_error(B->L, "resulting string too large")); - /* else B->n + sz + 1 <= MAX_SIZE */ - if (newsize <= MAX_SIZE/3 * 2) /* no overflow? */ - newsize += (newsize >> 1); /* new size *= 1.5 */ - if (newsize < B->n + sz + 1) /* not big enough? */ - newsize = B->n + sz + 1; - return newsize; -} - - -/* -** Returns a pointer to a free area with at least 'sz' bytes in buffer -** 'B'. 'boxidx' is the relative position in the stack where is the -** buffer's box or its placeholder. -*/ -static char *prepbuffsize (luaL_Buffer *B, size_t sz, int boxidx) { - checkbufferlevel(B, boxidx); - if (B->size - B->n >= sz) /* enough space? */ - return B->b + B->n; - else { - lua_State *L = B->L; - char *newbuff; - size_t newsize = newbuffsize(B, sz); - /* create larger buffer */ - if (buffonstack(B)) /* buffer already has a box? */ - newbuff = (char *)resizebox(L, boxidx, newsize); /* resize it */ - else { /* no box yet */ - lua_remove(L, boxidx); /* remove placeholder */ - newbox(L); /* create a new box */ - lua_insert(L, boxidx); /* move box to its intended position */ - lua_toclose(L, boxidx); - newbuff = (char *)resizebox(L, boxidx, newsize); - memcpy(newbuff, B->b, B->n * sizeof(char)); /* copy original content */ - } - B->b = newbuff; - B->size = newsize; - return newbuff + B->n; - } -} - -/* -** returns a pointer to a free area with at least 'sz' bytes -*/ -LUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) { - return prepbuffsize(B, sz, -1); -} - - -LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) { - if (l > 0) { /* avoid 'memcpy' when 's' can be NULL */ - char *b = prepbuffsize(B, l, -1); - memcpy(b, s, l * sizeof(char)); - luaL_addsize(B, l); - } -} - - -LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) { - luaL_addlstring(B, s, strlen(s)); -} - - -LUALIB_API void luaL_pushresult (luaL_Buffer *B) { - lua_State *L = B->L; - checkbufferlevel(B, -1); - if (!buffonstack(B)) /* using static buffer? */ - lua_pushlstring(L, B->b, B->n); /* save result as regular string */ - else { /* reuse buffer already allocated */ - UBox *box = (UBox *)lua_touserdata(L, -1); - void *ud; - lua_Alloc allocf = lua_getallocf(L, &ud); /* function to free buffer */ - size_t len = B->n; /* final string length */ - char *s; - resizebox(L, -1, len + 1); /* adjust box size to content size */ - s = (char*)box->box; /* final buffer address */ - s[len] = '\0'; /* add ending zero */ - /* clear box, as Lua will take control of the buffer */ - box->bsize = 0; box->box = NULL; - lua_pushexternalstring(L, s, len, allocf, ud); - lua_closeslot(L, -2); /* close the box */ - lua_gc(L, LUA_GCSTEP, len); - } - lua_remove(L, -2); /* remove box or placeholder from the stack */ -} - - -LUALIB_API void luaL_pushresultsize (luaL_Buffer *B, size_t sz) { - luaL_addsize(B, sz); - luaL_pushresult(B); -} - - -/* -** 'luaL_addvalue' is the only function in the Buffer system where the -** box (if existent) is not on the top of the stack. So, instead of -** calling 'luaL_addlstring', it replicates the code using -2 as the -** last argument to 'prepbuffsize', signaling that the box is (or will -** be) below the string being added to the buffer. (Box creation can -** trigger an emergency GC, so we should not remove the string from the -** stack before we have the space guaranteed.) -*/ -LUALIB_API void luaL_addvalue (luaL_Buffer *B) { - lua_State *L = B->L; - size_t len; - const char *s = lua_tolstring(L, -1, &len); - char *b = prepbuffsize(B, len, -2); - memcpy(b, s, len * sizeof(char)); - luaL_addsize(B, len); - lua_pop(L, 1); /* pop string */ -} - - -LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) { - B->L = L; - B->b = B->init.b; - B->n = 0; - B->size = LUAL_BUFFERSIZE; - lua_pushlightuserdata(L, (void*)B); /* push placeholder */ -} - - -LUALIB_API char *luaL_buffinitsize (lua_State *L, luaL_Buffer *B, size_t sz) { - luaL_buffinit(L, B); - return prepbuffsize(B, sz, -1); -} - -/* }====================================================== */ - - -/* -** {====================================================== -** Reference system -** ======================================================= -*/ - -/* -** The previously freed references form a linked list: t[1] is the index -** of a first free index, t[t[1]] is the index of the second element, -** etc. A zero signals the end of the list. -*/ -LUALIB_API int luaL_ref (lua_State *L, int t) { - int ref; - if (lua_isnil(L, -1)) { - lua_pop(L, 1); /* remove from stack */ - return LUA_REFNIL; /* 'nil' has a unique fixed reference */ - } - t = lua_absindex(L, t); - if (lua_rawgeti(L, t, 1) == LUA_TNUMBER) /* already initialized? */ - ref = (int)lua_tointeger(L, -1); /* ref = t[1] */ - else { /* first access */ - lua_assert(!lua_toboolean(L, -1)); /* must be nil or false */ - ref = 0; /* list is empty */ - lua_pushinteger(L, 0); /* initialize as an empty list */ - lua_rawseti(L, t, 1); /* ref = t[1] = 0 */ - } - lua_pop(L, 1); /* remove element from stack */ - if (ref != 0) { /* any free element? */ - lua_rawgeti(L, t, ref); /* remove it from list */ - lua_rawseti(L, t, 1); /* (t[1] = t[ref]) */ - } - else /* no free elements */ - ref = (int)lua_rawlen(L, t) + 1; /* get a new reference */ - lua_rawseti(L, t, ref); - return ref; -} - - -LUALIB_API void luaL_unref (lua_State *L, int t, int ref) { - if (ref >= 0) { - t = lua_absindex(L, t); - lua_rawgeti(L, t, 1); - lua_assert(lua_isinteger(L, -1)); - lua_rawseti(L, t, ref); /* t[ref] = t[1] */ - lua_pushinteger(L, ref); - lua_rawseti(L, t, 1); /* t[1] = ref */ - } -} - -/* }====================================================== */ - - -/* -** {====================================================== -** Load functions -** ======================================================= -*/ - -typedef struct LoadF { - unsigned n; /* number of pre-read characters */ - FILE *f; /* file being read */ - char buff[BUFSIZ]; /* area for reading file */ -} LoadF; - - -static const char *getF (lua_State *L, void *ud, size_t *size) { - LoadF *lf = (LoadF *)ud; - UNUSED(L); - if (lf->n > 0) { /* are there pre-read characters to be read? */ - *size = lf->n; /* return them (chars already in buffer) */ - lf->n = 0; /* no more pre-read characters */ - } - else { /* read a block from file */ - /* 'fread' can return > 0 *and* set the EOF flag. If next call to - 'getF' called 'fread', it might still wait for user input. - The next check avoids this problem. */ - if (feof(lf->f)) return NULL; - *size = fread(lf->buff, 1, sizeof(lf->buff), lf->f); /* read block */ - } - return lf->buff; -} - - -static int errfile (lua_State *L, const char *what, int fnameindex) { - int err = errno; - const char *filename = lua_tostring(L, fnameindex) + 1; - if (err != 0) - lua_pushfstring(L, "cannot %s %s: %s", what, filename, strerror(err)); - else - lua_pushfstring(L, "cannot %s %s", what, filename); - lua_remove(L, fnameindex); - return LUA_ERRFILE; -} - - -/* -** Skip an optional BOM at the start of a stream. If there is an -** incomplete BOM (the first character is correct but the rest is -** not), returns the first character anyway to force an error -** (as no chunk can start with 0xEF). -*/ -static int skipBOM (FILE *f) { - int c = getc(f); /* read first character */ - if (c == 0xEF && getc(f) == 0xBB && getc(f) == 0xBF) /* correct BOM? */ - return getc(f); /* ignore BOM and return next char */ - else /* no (valid) BOM */ - return c; /* return first character */ -} - - -/* -** reads the first character of file 'f' and skips an optional BOM mark -** in its beginning plus its first line if it starts with '#'. Returns -** true if it skipped the first line. In any case, '*cp' has the -** first "valid" character of the file (after the optional BOM and -** a first-line comment). -*/ -static int skipcomment (FILE *f, int *cp) { - int c = *cp = skipBOM(f); - if (c == '#') { /* first line is a comment (Unix exec. file)? */ - do { /* skip first line */ - c = getc(f); - } while (c != EOF && c != '\n'); - *cp = getc(f); /* next character after comment, if present */ - return 1; /* there was a comment */ - } - else return 0; /* no comment */ -} - - -LUALIB_API int luaL_loadfilex (lua_State *L, const char *filename, - const char *mode) { - LoadF lf; - int status, readstatus; - int c; - int fnameindex = lua_gettop(L) + 1; /* index of filename on the stack */ - if (filename == NULL) { - lua_pushliteral(L, "=stdin"); - lf.f = stdin; - } - else { - lua_pushfstring(L, "@%s", filename); - errno = 0; - lf.f = fopen(filename, "r"); - if (lf.f == NULL) return errfile(L, "open", fnameindex); - } - lf.n = 0; - if (skipcomment(lf.f, &c)) /* read initial portion */ - lf.buff[lf.n++] = '\n'; /* add newline to correct line numbers */ - if (c == LUA_SIGNATURE[0]) { /* binary file? */ - lf.n = 0; /* remove possible newline */ - if (filename) { /* "real" file? */ - errno = 0; - lf.f = freopen(filename, "rb", lf.f); /* reopen in binary mode */ - if (lf.f == NULL) return errfile(L, "reopen", fnameindex); - skipcomment(lf.f, &c); /* re-read initial portion */ - } - } - if (c != EOF) - lf.buff[lf.n++] = cast_char(c); /* 'c' is the first character */ - status = lua_load(L, getF, &lf, lua_tostring(L, -1), mode); - readstatus = ferror(lf.f); - errno = 0; /* no useful error number until here */ - if (filename) fclose(lf.f); /* close file (even in case of errors) */ - if (readstatus) { - lua_settop(L, fnameindex); /* ignore results from 'lua_load' */ - return errfile(L, "read", fnameindex); - } - lua_remove(L, fnameindex); - return status; -} - - -typedef struct LoadS { - const char *s; - size_t size; -} LoadS; - - -static const char *getS (lua_State *L, void *ud, size_t *size) { - LoadS *ls = (LoadS *)ud; - UNUSED(L); - if (ls->size == 0) return NULL; - *size = ls->size; - ls->size = 0; - return ls->s; -} - - -LUALIB_API int luaL_loadbufferx (lua_State *L, const char *buff, size_t size, - const char *name, const char *mode) { - LoadS ls; - ls.s = buff; - ls.size = size; - return lua_load(L, getS, &ls, name, mode); -} - - -LUALIB_API int luaL_loadstring (lua_State *L, const char *s) { - return luaL_loadbufferx(L, s, strlen(s), s, "t"); -} - -/* }====================================================== */ - - - -LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) { - if (!lua_getmetatable(L, obj)) /* no metatable? */ - return LUA_TNIL; - else { - int tt; - lua_pushstring(L, event); - tt = lua_rawget(L, -2); - if (tt == LUA_TNIL) /* is metafield nil? */ - lua_pop(L, 2); /* remove metatable and metafield */ - else - lua_remove(L, -2); /* remove only metatable */ - return tt; /* return metafield type */ - } -} - - -LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) { - obj = lua_absindex(L, obj); - if (luaL_getmetafield(L, obj, event) == LUA_TNIL) /* no metafield? */ - return 0; - lua_pushvalue(L, obj); - lua_call(L, 1, 1); - return 1; -} - - -LUALIB_API lua_Integer luaL_len (lua_State *L, int idx) { - lua_Integer l; - int isnum; - lua_len(L, idx); - l = lua_tointegerx(L, -1, &isnum); - if (l_unlikely(!isnum)) - luaL_error(L, "object length is not an integer"); - lua_pop(L, 1); /* remove object */ - return l; -} - - -LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) { - idx = lua_absindex(L,idx); - if (luaL_callmeta(L, idx, "__tostring")) { /* metafield? */ - if (!lua_isstring(L, -1)) - luaL_error(L, "'__tostring' must return a string"); - } - else { - switch (lua_type(L, idx)) { - case LUA_TNUMBER: { - char buff[LUA_N2SBUFFSZ]; - lua_numbertocstring(L, idx, buff); - lua_pushstring(L, buff); - break; - } - case LUA_TSTRING: - lua_pushvalue(L, idx); - break; - case LUA_TBOOLEAN: - lua_pushstring(L, (lua_toboolean(L, idx) ? "true" : "false")); - break; - case LUA_TNIL: - lua_pushliteral(L, "nil"); - break; - default: { - int tt = luaL_getmetafield(L, idx, "__name"); /* try name */ - const char *kind = (tt == LUA_TSTRING) ? lua_tostring(L, -1) : - luaL_typename(L, idx); - lua_pushfstring(L, "%s: %p", kind, lua_topointer(L, idx)); - if (tt != LUA_TNIL) - lua_remove(L, -2); /* remove '__name' */ - break; - } - } - } - return lua_tolstring(L, -1, len); -} - - -/* -** set functions from list 'l' into table at top - 'nup'; each -** function gets the 'nup' elements at the top as upvalues. -** Returns with only the table at the stack. -*/ -LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) { - luaL_checkstack(L, nup, "too many upvalues"); - for (; l->name != NULL; l++) { /* fill the table with given functions */ - if (l->func == NULL) /* placeholder? */ - lua_pushboolean(L, 0); - else { - int i; - for (i = 0; i < nup; i++) /* copy upvalues to the top */ - lua_pushvalue(L, -nup); - lua_pushcclosure(L, l->func, nup); /* closure with those upvalues */ - } - lua_setfield(L, -(nup + 2), l->name); - } - lua_pop(L, nup); /* remove upvalues */ -} - - -/* -** ensure that stack[idx][fname] has a table and push that table -** into the stack -*/ -LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) { - if (lua_getfield(L, idx, fname) == LUA_TTABLE) - return 1; /* table already there */ - else { - lua_pop(L, 1); /* remove previous result */ - idx = lua_absindex(L, idx); - lua_newtable(L); - lua_pushvalue(L, -1); /* copy to be left at top */ - lua_setfield(L, idx, fname); /* assign new table to field */ - return 0; /* false, because did not find table there */ - } -} - - -/* -** Stripped-down 'require': After checking "loaded" table, calls 'openf' -** to open a module, registers the result in 'package.loaded' table and, -** if 'glb' is true, also registers the result in the global table. -** Leaves resulting module on the top. -*/ -LUALIB_API void luaL_requiref (lua_State *L, const char *modname, - lua_CFunction openf, int glb) { - luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE); - lua_getfield(L, -1, modname); /* LOADED[modname] */ - if (!lua_toboolean(L, -1)) { /* package not already loaded? */ - lua_pop(L, 1); /* remove field */ - lua_pushcfunction(L, openf); - lua_pushstring(L, modname); /* argument to open function */ - lua_call(L, 1, 1); /* call 'openf' to open module */ - lua_pushvalue(L, -1); /* make copy of module (call result) */ - lua_setfield(L, -3, modname); /* LOADED[modname] = module */ - } - lua_remove(L, -2); /* remove LOADED table */ - if (glb) { - lua_pushvalue(L, -1); /* copy of module */ - lua_setglobal(L, modname); /* _G[modname] = module */ - } -} - - -LUALIB_API void luaL_addgsub (luaL_Buffer *b, const char *s, - const char *p, const char *r) { - const char *wild; - size_t l = strlen(p); - while ((wild = strstr(s, p)) != NULL) { - luaL_addlstring(b, s, ct_diff2sz(wild - s)); /* push prefix */ - luaL_addstring(b, r); /* push replacement in place of pattern */ - s = wild + l; /* continue after 'p' */ - } - luaL_addstring(b, s); /* push last suffix */ -} - - -LUALIB_API const char *luaL_gsub (lua_State *L, const char *s, - const char *p, const char *r) { - luaL_Buffer b; - luaL_buffinit(L, &b); - luaL_addgsub(&b, s, p, r); - luaL_pushresult(&b); - return lua_tostring(L, -1); -} - - -void *luaL_alloc (void *ud, void *ptr, size_t osize, size_t nsize) { - UNUSED(ud); UNUSED(osize); - if (nsize == 0) { - free(ptr); - return NULL; - } - else - return realloc(ptr, nsize); -} - - -/* -** Standard panic function just prints an error message. The test -** with 'lua_type' avoids possible memory errors in 'lua_tostring'. -*/ -static int panic (lua_State *L) { - const char *msg = (lua_type(L, -1) == LUA_TSTRING) - ? lua_tostring(L, -1) - : "error object is not a string"; - lua_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n", - msg); - return 0; /* return to Lua to abort */ -} - - -/* -** Warning functions: -** warnfoff: warning system is off -** warnfon: ready to start a new message -** warnfcont: previous message is to be continued -*/ -static void warnfoff (void *ud, const char *message, int tocont); -static void warnfon (void *ud, const char *message, int tocont); -static void warnfcont (void *ud, const char *message, int tocont); - - -/* -** Check whether message is a control message. If so, execute the -** control or ignore it if unknown. -*/ -static int checkcontrol (lua_State *L, const char *message, int tocont) { - if (tocont || *(message++) != '@') /* not a control message? */ - return 0; - else { - if (strcmp(message, "off") == 0) - lua_setwarnf(L, warnfoff, L); /* turn warnings off */ - else if (strcmp(message, "on") == 0) - lua_setwarnf(L, warnfon, L); /* turn warnings on */ - return 1; /* it was a control message */ - } -} - - -static void warnfoff (void *ud, const char *message, int tocont) { - checkcontrol((lua_State *)ud, message, tocont); -} - - -/* -** Writes the message and handle 'tocont', finishing the message -** if needed and setting the next warn function. -*/ -static void warnfcont (void *ud, const char *message, int tocont) { - lua_State *L = (lua_State *)ud; - lua_writestringerror("%s", message); /* write message */ - if (tocont) /* not the last part? */ - lua_setwarnf(L, warnfcont, L); /* to be continued */ - else { /* last part */ - lua_writestringerror("%s", "\n"); /* finish message with end-of-line */ - lua_setwarnf(L, warnfon, L); /* next call is a new message */ - } -} - - -static void warnfon (void *ud, const char *message, int tocont) { - if (checkcontrol((lua_State *)ud, message, tocont)) /* control message? */ - return; /* nothing else to be done */ - lua_writestringerror("%s", "Lua warning: "); /* start a new warning */ - warnfcont(ud, message, tocont); /* finish processing */ -} - - - -/* -** A function to compute an unsigned int with some level of -** randomness. Rely on Address Space Layout Randomization (if present) -** and the current time. -*/ -#if !defined(luai_makeseed) - -#include - - -/* Size for the buffer, in bytes */ -#define BUFSEEDB (sizeof(void*) + sizeof(time_t)) - -/* Size for the buffer in int's, rounded up */ -#define BUFSEED ((BUFSEEDB + sizeof(int) - 1) / sizeof(int)) - -/* -** Copy the contents of variable 'v' into the buffer pointed by 'b'. -** (The '&b[0]' disguises 'b' to fix an absurd warning from clang.) -*/ -#define addbuff(b,v) (memcpy(&b[0], &(v), sizeof(v)), b += sizeof(v)) - - -static unsigned int luai_makeseed (void) { - unsigned int buff[BUFSEED]; - unsigned int res; - unsigned int i; - time_t t = time(NULL); - char *b = (char*)buff; - addbuff(b, b); /* local variable's address */ - addbuff(b, t); /* time */ - /* fill (rare but possible) remain of the buffer with zeros */ - memset(b, 0, sizeof(buff) - BUFSEEDB); - res = buff[0]; - for (i = 1; i < BUFSEED; i++) - res ^= (res >> 3) + (res << 7) + buff[i]; - return res; -} - -#endif - - -LUALIB_API unsigned int luaL_makeseed (lua_State *L) { - UNUSED(L); - return luai_makeseed(); -} - - -/* -** Use the name with parentheses so that headers can redefine it -** as a macro. -*/ -LUALIB_API lua_State *(luaL_newstate) (void) { - lua_State *L = lua_newstate(luaL_alloc, NULL, luaL_makeseed(NULL)); - if (l_likely(L)) { - lua_atpanic(L, &panic); - lua_setwarnf(L, warnfon, L); - } - return L; -} - - -LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver, size_t sz) { - lua_Number v = lua_version(L); - if (sz != LUAL_NUMSIZES) /* check numeric types */ - luaL_error(L, "core and library have incompatible numeric types"); - else if (v != ver) - luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f", - (LUAI_UACNUMBER)ver, (LUAI_UACNUMBER)v); -} - diff --git a/lib/lua/lauxlib.h b/lib/lua/lauxlib.h deleted file mode 100644 index 2d01536..0000000 --- a/lib/lua/lauxlib.h +++ /dev/null @@ -1,271 +0,0 @@ -/* -** $Id: lauxlib.h $ -** Auxiliary functions for building Lua libraries -** See Copyright Notice in lua.h -*/ - - -#ifndef lauxlib_h -#define lauxlib_h - - -#include -#include - -#include "luaconf.h" -#include "lua.h" - - -/* global table */ -#define LUA_GNAME "_G" - - -typedef struct luaL_Buffer luaL_Buffer; - - -/* extra error code for 'luaL_loadfilex' */ -#define LUA_ERRFILE (LUA_ERRERR+1) - - -/* key, in the registry, for table of loaded modules */ -#define LUA_LOADED_TABLE "_LOADED" - - -/* key, in the registry, for table of preloaded loaders */ -#define LUA_PRELOAD_TABLE "_PRELOAD" - - -typedef struct luaL_Reg { - const char *name; - lua_CFunction func; -} luaL_Reg; - - -#define LUAL_NUMSIZES (sizeof(lua_Integer)*16 + sizeof(lua_Number)) - -LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver, size_t sz); -#define luaL_checkversion(L) \ - luaL_checkversion_(L, LUA_VERSION_NUM, LUAL_NUMSIZES) - -LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e); -LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e); -LUALIB_API const char *(luaL_tolstring) (lua_State *L, int idx, size_t *len); -LUALIB_API int (luaL_argerror) (lua_State *L, int arg, const char *extramsg); -LUALIB_API int (luaL_typeerror) (lua_State *L, int arg, const char *tname); -LUALIB_API const char *(luaL_checklstring) (lua_State *L, int arg, - size_t *l); -LUALIB_API const char *(luaL_optlstring) (lua_State *L, int arg, - const char *def, size_t *l); -LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int arg); -LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int arg, lua_Number def); - -LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int arg); -LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int arg, - lua_Integer def); - -LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg); -LUALIB_API void (luaL_checktype) (lua_State *L, int arg, int t); -LUALIB_API void (luaL_checkany) (lua_State *L, int arg); - -LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname); -LUALIB_API void (luaL_setmetatable) (lua_State *L, const char *tname); -LUALIB_API void *(luaL_testudata) (lua_State *L, int ud, const char *tname); -LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname); - -LUALIB_API void (luaL_where) (lua_State *L, int lvl); -LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...); - -LUALIB_API int (luaL_checkoption) (lua_State *L, int arg, const char *def, - const char *const lst[]); - -LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname); -LUALIB_API int (luaL_execresult) (lua_State *L, int stat); - -LUALIB_API void *(luaL_alloc) (void *ud, void *ptr, size_t osize, - size_t nsize); - - -/* predefined references */ -#define LUA_NOREF (-2) -#define LUA_REFNIL (-1) - -LUALIB_API int (luaL_ref) (lua_State *L, int t); -LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref); - -LUALIB_API int (luaL_loadfilex) (lua_State *L, const char *filename, - const char *mode); - -#define luaL_loadfile(L,f) luaL_loadfilex(L,f,NULL) - -LUALIB_API int (luaL_loadbufferx) (lua_State *L, const char *buff, size_t sz, - const char *name, const char *mode); -LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s); - -LUALIB_API lua_State *(luaL_newstate) (void); - -LUALIB_API unsigned (luaL_makeseed) (lua_State *L); - -LUALIB_API lua_Integer (luaL_len) (lua_State *L, int idx); - -LUALIB_API void (luaL_addgsub) (luaL_Buffer *b, const char *s, - const char *p, const char *r); -LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, - const char *p, const char *r); - -LUALIB_API void (luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup); - -LUALIB_API int (luaL_getsubtable) (lua_State *L, int idx, const char *fname); - -LUALIB_API void (luaL_traceback) (lua_State *L, lua_State *L1, - const char *msg, int level); - -LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname, - lua_CFunction openf, int glb); - -/* -** =============================================================== -** some useful macros -** =============================================================== -*/ - - -#define luaL_newlibtable(L,l) \ - lua_createtable(L, 0, sizeof(l)/sizeof((l)[0]) - 1) - -#define luaL_newlib(L,l) \ - (luaL_checkversion(L), luaL_newlibtable(L,l), luaL_setfuncs(L,l,0)) - -#define luaL_argcheck(L, cond,arg,extramsg) \ - ((void)(luai_likely(cond) || luaL_argerror(L, (arg), (extramsg)))) - -#define luaL_argexpected(L,cond,arg,tname) \ - ((void)(luai_likely(cond) || luaL_typeerror(L, (arg), (tname)))) - -#define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL)) -#define luaL_optstring(L,n,d) (luaL_optlstring(L, (n), (d), NULL)) - -#define luaL_typename(L,i) lua_typename(L, lua_type(L,(i))) - -#define luaL_dofile(L, fn) \ - (luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0)) - -#define luaL_dostring(L, s) \ - (luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0)) - -#define luaL_getmetatable(L,n) (lua_getfield(L, LUA_REGISTRYINDEX, (n))) - -#define luaL_opt(L,f,n,d) (lua_isnoneornil(L,(n)) ? (d) : f(L,(n))) - -#define luaL_loadbuffer(L,s,sz,n) luaL_loadbufferx(L,s,sz,n,NULL) - - -/* -** Perform arithmetic operations on lua_Integer values with wrap-around -** semantics, as the Lua core does. -*/ -#define luaL_intop(op,v1,v2) \ - ((lua_Integer)((lua_Unsigned)(v1) op (lua_Unsigned)(v2))) - - -/* push the value used to represent failure/error */ -#if defined(LUA_FAILISFALSE) -#define luaL_pushfail(L) lua_pushboolean(L, 0) -#else -#define luaL_pushfail(L) lua_pushnil(L) -#endif - - - -/* -** {====================================================== -** Generic Buffer manipulation -** ======================================================= -*/ - -struct luaL_Buffer { - char *b; /* buffer address */ - size_t size; /* buffer size */ - size_t n; /* number of characters in buffer */ - lua_State *L; - union { - LUAI_MAXALIGN; /* ensure maximum alignment for buffer */ - char b[LUAL_BUFFERSIZE]; /* initial buffer */ - } init; -}; - - -#define luaL_bufflen(bf) ((bf)->n) -#define luaL_buffaddr(bf) ((bf)->b) - - -#define luaL_addchar(B,c) \ - ((void)((B)->n < (B)->size || luaL_prepbuffsize((B), 1)), \ - ((B)->b[(B)->n++] = (c))) - -#define luaL_addsize(B,s) ((B)->n += (s)) - -#define luaL_buffsub(B,s) ((B)->n -= (s)) - -LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B); -LUALIB_API char *(luaL_prepbuffsize) (luaL_Buffer *B, size_t sz); -LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l); -LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s); -LUALIB_API void (luaL_addvalue) (luaL_Buffer *B); -LUALIB_API void (luaL_pushresult) (luaL_Buffer *B); -LUALIB_API void (luaL_pushresultsize) (luaL_Buffer *B, size_t sz); -LUALIB_API char *(luaL_buffinitsize) (lua_State *L, luaL_Buffer *B, size_t sz); - -#define luaL_prepbuffer(B) luaL_prepbuffsize(B, LUAL_BUFFERSIZE) - -/* }====================================================== */ - - - -/* -** {====================================================== -** File handles for IO library -** ======================================================= -*/ - -/* -** A file handle is a userdata with metatable 'LUA_FILEHANDLE' and -** initial structure 'luaL_Stream' (it may contain other fields -** after that initial structure). -*/ - -#define LUA_FILEHANDLE "FILE*" - - -typedef struct luaL_Stream { - FILE *f; /* stream (NULL for incompletely created streams) */ - lua_CFunction closef; /* to close stream (NULL for closed streams) */ -} luaL_Stream; - -/* }====================================================== */ - - -/* -** {============================================================ -** Compatibility with deprecated conversions -** ============================================================= -*/ -#if defined(LUA_COMPAT_APIINTCASTS) - -#define luaL_checkunsigned(L,a) ((lua_Unsigned)luaL_checkinteger(L,a)) -#define luaL_optunsigned(L,a,d) \ - ((lua_Unsigned)luaL_optinteger(L,a,(lua_Integer)(d))) - -#define luaL_checkint(L,n) ((int)luaL_checkinteger(L, (n))) -#define luaL_optint(L,n,d) ((int)luaL_optinteger(L, (n), (d))) - -#define luaL_checklong(L,n) ((long)luaL_checkinteger(L, (n))) -#define luaL_optlong(L,n,d) ((long)luaL_optinteger(L, (n), (d))) - -#endif -/* }============================================================ */ - - - -#endif - - diff --git a/lib/lua/lbaselib.c b/lib/lua/lbaselib.c deleted file mode 100644 index 3962ea5..0000000 --- a/lib/lua/lbaselib.c +++ /dev/null @@ -1,552 +0,0 @@ -/* -** $Id: lbaselib.c $ -** Basic library -** See Copyright Notice in lua.h -*/ - -#define lbaselib_c -#define LUA_LIB - -#include "lprefix.h" - - -#include -#include -#include -#include - -#include "lua.h" - -#include "lauxlib.h" -#include "lualib.h" -#include "llimits.h" - - -static int luaB_print (lua_State *L) { - int n = lua_gettop(L); /* number of arguments */ - int i; - for (i = 1; i <= n; i++) { /* for each argument */ - size_t l; - const char *s = luaL_tolstring(L, i, &l); /* convert it to string */ - if (i > 1) /* not the first element? */ - lua_writestring("\t", 1); /* add a tab before it */ - lua_writestring(s, l); /* print it */ - lua_pop(L, 1); /* pop result */ - } - lua_writeline(); - return 0; -} - - -/* -** Creates a warning with all given arguments. -** Check first for errors; otherwise an error may interrupt -** the composition of a warning, leaving it unfinished. -*/ -static int luaB_warn (lua_State *L) { - int n = lua_gettop(L); /* number of arguments */ - int i; - luaL_checkstring(L, 1); /* at least one argument */ - for (i = 2; i <= n; i++) - luaL_checkstring(L, i); /* make sure all arguments are strings */ - for (i = 1; i < n; i++) /* compose warning */ - lua_warning(L, lua_tostring(L, i), 1); - lua_warning(L, lua_tostring(L, n), 0); /* close warning */ - return 0; -} - - -#define SPACECHARS " \f\n\r\t\v" - -static const char *b_str2int (const char *s, unsigned base, lua_Integer *pn) { - lua_Unsigned n = 0; - int neg = 0; - s += strspn(s, SPACECHARS); /* skip initial spaces */ - if (*s == '-') { s++; neg = 1; } /* handle sign */ - else if (*s == '+') s++; - if (!isalnum(cast_uchar(*s))) /* no digit? */ - return NULL; - do { - unsigned digit = cast_uint(isdigit(cast_uchar(*s)) - ? *s - '0' - : (toupper(cast_uchar(*s)) - 'A') + 10); - if (digit >= base) return NULL; /* invalid numeral */ - n = n * base + digit; - s++; - } while (isalnum(cast_uchar(*s))); - s += strspn(s, SPACECHARS); /* skip trailing spaces */ - *pn = (lua_Integer)((neg) ? (0u - n) : n); - return s; -} - - -static int luaB_tonumber (lua_State *L) { - if (lua_isnoneornil(L, 2)) { /* standard conversion? */ - if (lua_type(L, 1) == LUA_TNUMBER) { /* already a number? */ - lua_settop(L, 1); /* yes; return it */ - return 1; - } - else { - size_t l; - const char *s = lua_tolstring(L, 1, &l); - if (s != NULL && lua_stringtonumber(L, s) == l + 1) - return 1; /* successful conversion to number */ - /* else not a number */ - luaL_checkany(L, 1); /* (but there must be some parameter) */ - } - } - else { - size_t l; - const char *s; - lua_Integer n = 0; /* to avoid warnings */ - lua_Integer base = luaL_checkinteger(L, 2); - luaL_checktype(L, 1, LUA_TSTRING); /* no numbers as strings */ - s = lua_tolstring(L, 1, &l); - luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range"); - if (b_str2int(s, cast_uint(base), &n) == s + l) { - lua_pushinteger(L, n); - return 1; - } /* else not a number */ - } /* else not a number */ - luaL_pushfail(L); /* not a number */ - return 1; -} - - -static int luaB_error (lua_State *L) { - int level = (int)luaL_optinteger(L, 2, 1); - lua_settop(L, 1); - if (lua_type(L, 1) == LUA_TSTRING && level > 0) { - luaL_where(L, level); /* add extra information */ - lua_pushvalue(L, 1); - lua_concat(L, 2); - } - return lua_error(L); -} - - -static int luaB_getmetatable (lua_State *L) { - luaL_checkany(L, 1); - if (!lua_getmetatable(L, 1)) { - lua_pushnil(L); - return 1; /* no metatable */ - } - luaL_getmetafield(L, 1, "__metatable"); - return 1; /* returns either __metatable field (if present) or metatable */ -} - - -static int luaB_setmetatable (lua_State *L) { - int t = lua_type(L, 2); - luaL_checktype(L, 1, LUA_TTABLE); - luaL_argexpected(L, t == LUA_TNIL || t == LUA_TTABLE, 2, "nil or table"); - if (l_unlikely(luaL_getmetafield(L, 1, "__metatable") != LUA_TNIL)) - return luaL_error(L, "cannot change a protected metatable"); - lua_settop(L, 2); - lua_setmetatable(L, 1); - return 1; -} - - -static int luaB_rawequal (lua_State *L) { - luaL_checkany(L, 1); - luaL_checkany(L, 2); - lua_pushboolean(L, lua_rawequal(L, 1, 2)); - return 1; -} - - -static int luaB_rawlen (lua_State *L) { - int t = lua_type(L, 1); - luaL_argexpected(L, t == LUA_TTABLE || t == LUA_TSTRING, 1, - "table or string"); - lua_pushinteger(L, l_castU2S(lua_rawlen(L, 1))); - return 1; -} - - -static int luaB_rawget (lua_State *L) { - luaL_checktype(L, 1, LUA_TTABLE); - luaL_checkany(L, 2); - lua_settop(L, 2); - lua_rawget(L, 1); - return 1; -} - -static int luaB_rawset (lua_State *L) { - luaL_checktype(L, 1, LUA_TTABLE); - luaL_checkany(L, 2); - luaL_checkany(L, 3); - lua_settop(L, 3); - lua_rawset(L, 1); - return 1; -} - - -static int pushmode (lua_State *L, int oldmode) { - if (oldmode == -1) - luaL_pushfail(L); /* invalid call to 'lua_gc' */ - else - lua_pushstring(L, (oldmode == LUA_GCINC) ? "incremental" - : "generational"); - return 1; -} - - -/* -** check whether call to 'lua_gc' was valid (not inside a finalizer) -*/ -#define checkvalres(res) { if (res == -1) break; } - -static int luaB_collectgarbage (lua_State *L) { - static const char *const opts[] = {"stop", "restart", "collect", - "count", "step", "isrunning", "generational", "incremental", - "param", NULL}; - static const char optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT, - LUA_GCCOUNT, LUA_GCSTEP, LUA_GCISRUNNING, LUA_GCGEN, LUA_GCINC, - LUA_GCPARAM}; - int o = optsnum[luaL_checkoption(L, 1, "collect", opts)]; - switch (o) { - case LUA_GCCOUNT: { - int k = lua_gc(L, o); - int b = lua_gc(L, LUA_GCCOUNTB); - checkvalres(k); - lua_pushnumber(L, (lua_Number)k + ((lua_Number)b/1024)); - return 1; - } - case LUA_GCSTEP: { - lua_Integer n = luaL_optinteger(L, 2, 0); - int res = lua_gc(L, o, cast_sizet(n)); - checkvalres(res); - lua_pushboolean(L, res); - return 1; - } - case LUA_GCISRUNNING: { - int res = lua_gc(L, o); - checkvalres(res); - lua_pushboolean(L, res); - return 1; - } - case LUA_GCGEN: { - return pushmode(L, lua_gc(L, o)); - } - case LUA_GCINC: { - return pushmode(L, lua_gc(L, o)); - } - case LUA_GCPARAM: { - static const char *const params[] = { - "minormul", "majorminor", "minormajor", - "pause", "stepmul", "stepsize", NULL}; - static const char pnum[] = { - LUA_GCPMINORMUL, LUA_GCPMAJORMINOR, LUA_GCPMINORMAJOR, - LUA_GCPPAUSE, LUA_GCPSTEPMUL, LUA_GCPSTEPSIZE}; - int p = pnum[luaL_checkoption(L, 2, NULL, params)]; - lua_Integer value = luaL_optinteger(L, 3, -1); - lua_pushinteger(L, lua_gc(L, o, p, (int)value)); - return 1; - } - default: { - int res = lua_gc(L, o); - checkvalres(res); - lua_pushinteger(L, res); - return 1; - } - } - luaL_pushfail(L); /* invalid call (inside a finalizer) */ - return 1; -} - - -static int luaB_type (lua_State *L) { - int t = lua_type(L, 1); - luaL_argcheck(L, t != LUA_TNONE, 1, "value expected"); - lua_pushstring(L, lua_typename(L, t)); - return 1; -} - - -static int luaB_next (lua_State *L) { - luaL_checktype(L, 1, LUA_TTABLE); - lua_settop(L, 2); /* create a 2nd argument if there isn't one */ - if (lua_next(L, 1)) - return 2; - else { - lua_pushnil(L); - return 1; - } -} - - -static int pairscont (lua_State *L, int status, lua_KContext k) { - (void)L; (void)status; (void)k; /* unused */ - return 4; /* __pairs did all the work, just return its results */ -} - -static int luaB_pairs (lua_State *L) { - luaL_checkany(L, 1); - if (luaL_getmetafield(L, 1, "__pairs") == LUA_TNIL) { /* no metamethod? */ - lua_pushcfunction(L, luaB_next); /* will return generator and */ - lua_pushvalue(L, 1); /* state */ - lua_pushnil(L); /* initial value */ - lua_pushnil(L); /* to-be-closed object */ - } - else { - lua_pushvalue(L, 1); /* argument 'self' to metamethod */ - lua_callk(L, 1, 4, 0, pairscont); /* get 4 values from metamethod */ - } - return 4; -} - - -/* -** Traversal function for 'ipairs' -*/ -static int ipairsaux (lua_State *L) { - lua_Integer i = luaL_checkinteger(L, 2); - i = luaL_intop(+, i, 1); - lua_pushinteger(L, i); - return (lua_geti(L, 1, i) == LUA_TNIL) ? 1 : 2; -} - - -/* -** 'ipairs' function. Returns 'ipairsaux', given "table", 0. -** (The given "table" may not be a table.) -*/ -static int luaB_ipairs (lua_State *L) { - luaL_checkany(L, 1); - lua_pushcfunction(L, ipairsaux); /* iteration function */ - lua_pushvalue(L, 1); /* state */ - lua_pushinteger(L, 0); /* initial value */ - return 3; -} - - -static int load_aux (lua_State *L, int status, int envidx) { - if (l_likely(status == LUA_OK)) { - if (envidx != 0) { /* 'env' parameter? */ - lua_pushvalue(L, envidx); /* environment for loaded function */ - if (!lua_setupvalue(L, -2, 1)) /* set it as 1st upvalue */ - lua_pop(L, 1); /* remove 'env' if not used by previous call */ - } - return 1; - } - else { /* error (message is on top of the stack) */ - luaL_pushfail(L); - lua_insert(L, -2); /* put before error message */ - return 2; /* return fail plus error message */ - } -} - - -static const char *getMode (lua_State *L, int idx) { - const char *mode = luaL_optstring(L, idx, NULL); - if (mode != NULL && strchr(mode, 'B') != NULL) { - /* Lua code cannot use fixed buffers */ - luaL_argerror(L, idx, "invalid mode"); - } - return mode; -} - - -static int luaB_loadfile (lua_State *L) { - const char *fname = luaL_optstring(L, 1, NULL); - const char *mode = getMode(L, 2); - int env = (!lua_isnone(L, 3) ? 3 : 0); /* 'env' index or 0 if no 'env' */ - int status = luaL_loadfilex(L, fname, mode); - return load_aux(L, status, env); -} - - -/* -** {====================================================== -** Generic Read function -** ======================================================= -*/ - - -/* -** Reader for generic 'load' function. -*/ -static const char *generic_reader (lua_State *L, void *ud, size_t *size) { - int *firstcall = cast(int *, ud); - luaL_checkstack(L, 2, "too many nested functions"); - if (*firstcall) - *firstcall = 0; - else - lua_pop(L, 1); /* remove previous result */ - lua_pushvalue(L, 1); /* get function */ - lua_call(L, 0, 1); /* call it */ - if (lua_isnil(L, -1)) { - *size = 0; - return NULL; - } - else if (l_unlikely(!lua_isstring(L, -1))) - luaL_error(L, "reader function must return a string"); - return lua_tolstring(L, -1, size); -} - - -static int luaB_load (lua_State *L) { - int status; - size_t l; - const char *s = lua_tolstring(L, 1, &l); - const char *mode = getMode(L, 3); - int env = (!lua_isnone(L, 4) ? 4 : 0); /* 'env' index or 0 if no 'env' */ - if (s != NULL) { /* loading a string? */ - const char *chunkname = luaL_optstring(L, 2, s); - status = luaL_loadbufferx(L, s, l, chunkname, mode); - } - else { /* loading from a reader function */ - int firstcall = 1; /* userdata for generic_reader */ - const char *chunkname = luaL_optstring(L, 2, "=(load)"); - luaL_checktype(L, 1, LUA_TFUNCTION); - status = lua_load(L, generic_reader, &firstcall, chunkname, mode); - } - return load_aux(L, status, env); -} - -/* }====================================================== */ - - -static int dofilecont (lua_State *L, int d1, lua_KContext d2) { - (void)d1; (void)d2; /* only to match 'lua_Kfunction' prototype */ - return lua_gettop(L) - 1; -} - - -static int luaB_dofile (lua_State *L) { - const char *fname = luaL_optstring(L, 1, NULL); - lua_settop(L, 1); - if (l_unlikely(luaL_loadfilex(L, fname, "bt") != LUA_OK)) - return lua_error(L); - lua_callk(L, 0, LUA_MULTRET, 0, dofilecont); - return dofilecont(L, 0, 0); -} - - -static int luaB_assert (lua_State *L) { - if (l_likely(lua_toboolean(L, 1))) /* condition is true? */ - return lua_gettop(L); /* return all arguments */ - else { /* error */ - luaL_checkany(L, 1); /* there must be a condition */ - lua_remove(L, 1); /* remove it */ - lua_pushliteral(L, "assertion failed!"); /* default message */ - lua_settop(L, 1); /* leave only message (default if no other one) */ - return luaB_error(L); /* call 'error' */ - } -} - - -static int luaB_select (lua_State *L) { - int n = lua_gettop(L); - if (lua_type(L, 1) == LUA_TSTRING && *lua_tostring(L, 1) == '#') { - lua_pushinteger(L, n-1); - return 1; - } - else { - lua_Integer i = luaL_checkinteger(L, 1); - if (i < 0) i = n + i; - else if (i > n) i = n; - luaL_argcheck(L, 1 <= i, 1, "index out of range"); - return n - (int)i; - } -} - - -/* -** Continuation function for 'pcall' and 'xpcall'. Both functions -** already pushed a 'true' before doing the call, so in case of success -** 'finishpcall' only has to return everything in the stack minus -** 'extra' values (where 'extra' is exactly the number of items to be -** ignored). -*/ -static int finishpcall (lua_State *L, int status, lua_KContext extra) { - if (l_unlikely(status != LUA_OK && status != LUA_YIELD)) { /* error? */ - lua_pushboolean(L, 0); /* first result (false) */ - lua_pushvalue(L, -2); /* error message */ - return 2; /* return false, msg */ - } - else - return lua_gettop(L) - (int)extra; /* return all results */ -} - - -static int luaB_pcall (lua_State *L) { - int status; - luaL_checkany(L, 1); - lua_pushboolean(L, 1); /* first result if no errors */ - lua_insert(L, 1); /* put it in place */ - status = lua_pcallk(L, lua_gettop(L) - 2, LUA_MULTRET, 0, 0, finishpcall); - return finishpcall(L, status, 0); -} - - -/* -** Do a protected call with error handling. After 'lua_rotate', the -** stack will have ; so, the function passes -** 2 to 'finishpcall' to skip the 2 first values when returning results. -*/ -static int luaB_xpcall (lua_State *L) { - int status; - int n = lua_gettop(L); - luaL_checktype(L, 2, LUA_TFUNCTION); /* check error function */ - lua_pushboolean(L, 1); /* first result */ - lua_pushvalue(L, 1); /* function */ - lua_rotate(L, 3, 2); /* move them below function's arguments */ - status = lua_pcallk(L, n - 2, LUA_MULTRET, 2, 2, finishpcall); - return finishpcall(L, status, 2); -} - - -static int luaB_tostring (lua_State *L) { - luaL_checkany(L, 1); - luaL_tolstring(L, 1, NULL); - return 1; -} - - -static const luaL_Reg base_funcs[] = { - {"assert", luaB_assert}, - {"collectgarbage", luaB_collectgarbage}, - {"dofile", luaB_dofile}, - {"error", luaB_error}, - {"getmetatable", luaB_getmetatable}, - {"ipairs", luaB_ipairs}, - {"loadfile", luaB_loadfile}, - {"load", luaB_load}, - {"next", luaB_next}, - {"pairs", luaB_pairs}, - {"pcall", luaB_pcall}, - {"print", luaB_print}, - {"warn", luaB_warn}, - {"rawequal", luaB_rawequal}, - {"rawlen", luaB_rawlen}, - {"rawget", luaB_rawget}, - {"rawset", luaB_rawset}, - {"select", luaB_select}, - {"setmetatable", luaB_setmetatable}, - {"tonumber", luaB_tonumber}, - {"tostring", luaB_tostring}, - {"type", luaB_type}, - {"xpcall", luaB_xpcall}, - /* placeholders */ - {LUA_GNAME, NULL}, - {"_VERSION", NULL}, - {NULL, NULL} -}; - - -LUAMOD_API int luaopen_base (lua_State *L) { - /* open lib into global table */ - lua_pushglobaltable(L); - luaL_setfuncs(L, base_funcs, 0); - /* set global _G */ - lua_pushvalue(L, -1); - lua_setfield(L, -2, LUA_GNAME); - /* set global _VERSION */ - lua_pushliteral(L, LUA_VERSION); - lua_setfield(L, -2, "_VERSION"); - return 1; -} - diff --git a/lib/lua/lcode.c b/lib/lua/lcode.c deleted file mode 100644 index 8b61d5d..0000000 --- a/lib/lua/lcode.c +++ /dev/null @@ -1,1970 +0,0 @@ -/* -** $Id: lcode.c $ -** Code generator for Lua -** See Copyright Notice in lua.h -*/ - -#define lcode_c -#define LUA_CORE - -#include "lprefix.h" - - -#include -#include -#include -#include - -#include "lua.h" - -#include "lcode.h" -#include "ldebug.h" -#include "ldo.h" -#include "lgc.h" -#include "llex.h" -#include "lmem.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lparser.h" -#include "lstring.h" -#include "ltable.h" -#include "lvm.h" - - -/* (note that expressions VJMP also have jumps.) */ -#define hasjumps(e) ((e)->t != (e)->f) - - -static int codesJ (FuncState *fs, OpCode o, int sj, int k); - - - -/* semantic error */ -l_noret luaK_semerror (LexState *ls, const char *fmt, ...) { - const char *msg; - va_list argp; - pushvfstring(ls->L, argp, fmt, msg); - ls->t.token = 0; /* remove "near " from final message */ - ls->linenumber = ls->lastline; /* back to line of last used token */ - luaX_syntaxerror(ls, msg); -} - - -/* -** If expression is a numeric constant, fills 'v' with its value -** and returns 1. Otherwise, returns 0. -*/ -static int tonumeral (const expdesc *e, TValue *v) { - if (hasjumps(e)) - return 0; /* not a numeral */ - switch (e->k) { - case VKINT: - if (v) setivalue(v, e->u.ival); - return 1; - case VKFLT: - if (v) setfltvalue(v, e->u.nval); - return 1; - default: return 0; - } -} - - -/* -** Get the constant value from a constant expression -*/ -static TValue *const2val (FuncState *fs, const expdesc *e) { - lua_assert(e->k == VCONST); - return &fs->ls->dyd->actvar.arr[e->u.info].k; -} - - -/* -** If expression is a constant, fills 'v' with its value -** and returns 1. Otherwise, returns 0. -*/ -int luaK_exp2const (FuncState *fs, const expdesc *e, TValue *v) { - if (hasjumps(e)) - return 0; /* not a constant */ - switch (e->k) { - case VFALSE: - setbfvalue(v); - return 1; - case VTRUE: - setbtvalue(v); - return 1; - case VNIL: - setnilvalue(v); - return 1; - case VKSTR: { - setsvalue(fs->ls->L, v, e->u.strval); - return 1; - } - case VCONST: { - setobj(fs->ls->L, v, const2val(fs, e)); - return 1; - } - default: return tonumeral(e, v); - } -} - - -/* -** Return the previous instruction of the current code. If there -** may be a jump target between the current instruction and the -** previous one, return an invalid instruction (to avoid wrong -** optimizations). -*/ -static Instruction *previousinstruction (FuncState *fs) { - static const Instruction invalidinstruction = ~(Instruction)0; - if (fs->pc > fs->lasttarget) - return &fs->f->code[fs->pc - 1]; /* previous instruction */ - else - return cast(Instruction*, &invalidinstruction); -} - - -/* -** Create a OP_LOADNIL instruction, but try to optimize: if the previous -** instruction is also OP_LOADNIL and ranges are compatible, adjust -** range of previous instruction instead of emitting a new one. (For -** instance, 'local a; local b' will generate a single opcode.) -*/ -void luaK_nil (FuncState *fs, int from, int n) { - int l = from + n - 1; /* last register to set nil */ - Instruction *previous = previousinstruction(fs); - if (GET_OPCODE(*previous) == OP_LOADNIL) { /* previous is LOADNIL? */ - int pfrom = GETARG_A(*previous); /* get previous range */ - int pl = pfrom + GETARG_B(*previous); - if ((pfrom <= from && from <= pl + 1) || - (from <= pfrom && pfrom <= l + 1)) { /* can connect both? */ - if (pfrom < from) from = pfrom; /* from = min(from, pfrom) */ - if (pl > l) l = pl; /* l = max(l, pl) */ - SETARG_A(*previous, from); - SETARG_B(*previous, l - from); - return; - } /* else go through */ - } - luaK_codeABC(fs, OP_LOADNIL, from, n - 1, 0); /* else no optimization */ -} - - -/* -** Gets the destination address of a jump instruction. Used to traverse -** a list of jumps. -*/ -static int getjump (FuncState *fs, int pc) { - int offset = GETARG_sJ(fs->f->code[pc]); - if (offset == NO_JUMP) /* point to itself represents end of list */ - return NO_JUMP; /* end of list */ - else - return (pc+1)+offset; /* turn offset into absolute position */ -} - - -/* -** Fix jump instruction at position 'pc' to jump to 'dest'. -** (Jump addresses are relative in Lua) -*/ -static void fixjump (FuncState *fs, int pc, int dest) { - Instruction *jmp = &fs->f->code[pc]; - int offset = dest - (pc + 1); - lua_assert(dest != NO_JUMP); - if (!(-OFFSET_sJ <= offset && offset <= MAXARG_sJ - OFFSET_sJ)) - luaX_syntaxerror(fs->ls, "control structure too long"); - lua_assert(GET_OPCODE(*jmp) == OP_JMP); - SETARG_sJ(*jmp, offset); -} - - -/* -** Concatenate jump-list 'l2' into jump-list 'l1' -*/ -void luaK_concat (FuncState *fs, int *l1, int l2) { - if (l2 == NO_JUMP) return; /* nothing to concatenate? */ - else if (*l1 == NO_JUMP) /* no original list? */ - *l1 = l2; /* 'l1' points to 'l2' */ - else { - int list = *l1; - int next; - while ((next = getjump(fs, list)) != NO_JUMP) /* find last element */ - list = next; - fixjump(fs, list, l2); /* last element links to 'l2' */ - } -} - - -/* -** Create a jump instruction and return its position, so its destination -** can be fixed later (with 'fixjump'). -*/ -int luaK_jump (FuncState *fs) { - return codesJ(fs, OP_JMP, NO_JUMP, 0); -} - - -/* -** Code a 'return' instruction -*/ -void luaK_ret (FuncState *fs, int first, int nret) { - OpCode op; - switch (nret) { - case 0: op = OP_RETURN0; break; - case 1: op = OP_RETURN1; break; - default: op = OP_RETURN; break; - } - luaY_checklimit(fs, nret + 1, MAXARG_B, "returns"); - luaK_codeABC(fs, op, first, nret + 1, 0); -} - - -/* -** Code a "conditional jump", that is, a test or comparison opcode -** followed by a jump. Return jump position. -*/ -static int condjump (FuncState *fs, OpCode op, int A, int B, int C, int k) { - luaK_codeABCk(fs, op, A, B, C, k); - return luaK_jump(fs); -} - - -/* -** returns current 'pc' and marks it as a jump target (to avoid wrong -** optimizations with consecutive instructions not in the same basic block). -*/ -int luaK_getlabel (FuncState *fs) { - fs->lasttarget = fs->pc; - return fs->pc; -} - - -/* -** Returns the position of the instruction "controlling" a given -** jump (that is, its condition), or the jump itself if it is -** unconditional. -*/ -static Instruction *getjumpcontrol (FuncState *fs, int pc) { - Instruction *pi = &fs->f->code[pc]; - if (pc >= 1 && testTMode(GET_OPCODE(*(pi-1)))) - return pi-1; - else - return pi; -} - - -/* -** Patch destination register for a TESTSET instruction. -** If instruction in position 'node' is not a TESTSET, return 0 ("fails"). -** Otherwise, if 'reg' is not 'NO_REG', set it as the destination -** register. Otherwise, change instruction to a simple 'TEST' (produces -** no register value) -*/ -static int patchtestreg (FuncState *fs, int node, int reg) { - Instruction *i = getjumpcontrol(fs, node); - if (GET_OPCODE(*i) != OP_TESTSET) - return 0; /* cannot patch other instructions */ - if (reg != NO_REG && reg != GETARG_B(*i)) - SETARG_A(*i, reg); - else { - /* no register to put value or register already has the value; - change instruction to simple test */ - *i = CREATE_ABCk(OP_TEST, GETARG_B(*i), 0, 0, GETARG_k(*i)); - } - return 1; -} - - -/* -** Traverse a list of tests ensuring no one produces a value -*/ -static void removevalues (FuncState *fs, int list) { - for (; list != NO_JUMP; list = getjump(fs, list)) - patchtestreg(fs, list, NO_REG); -} - - -/* -** Traverse a list of tests, patching their destination address and -** registers: tests producing values jump to 'vtarget' (and put their -** values in 'reg'), other tests jump to 'dtarget'. -*/ -static void patchlistaux (FuncState *fs, int list, int vtarget, int reg, - int dtarget) { - while (list != NO_JUMP) { - int next = getjump(fs, list); - if (patchtestreg(fs, list, reg)) - fixjump(fs, list, vtarget); - else - fixjump(fs, list, dtarget); /* jump to default target */ - list = next; - } -} - - -/* -** Path all jumps in 'list' to jump to 'target'. -** (The assert means that we cannot fix a jump to a forward address -** because we only know addresses once code is generated.) -*/ -void luaK_patchlist (FuncState *fs, int list, int target) { - lua_assert(target <= fs->pc); - patchlistaux(fs, list, target, NO_REG, target); -} - - -void luaK_patchtohere (FuncState *fs, int list) { - int hr = luaK_getlabel(fs); /* mark "here" as a jump target */ - luaK_patchlist(fs, list, hr); -} - - -/* limit for difference between lines in relative line info. */ -#define LIMLINEDIFF 0x80 - - -/* -** Save line info for a new instruction. If difference from last line -** does not fit in a byte, of after that many instructions, save a new -** absolute line info; (in that case, the special value 'ABSLINEINFO' -** in 'lineinfo' signals the existence of this absolute information.) -** Otherwise, store the difference from last line in 'lineinfo'. -*/ -static void savelineinfo (FuncState *fs, Proto *f, int line) { - int linedif = line - fs->previousline; - int pc = fs->pc - 1; /* last instruction coded */ - if (abs(linedif) >= LIMLINEDIFF || fs->iwthabs++ >= MAXIWTHABS) { - luaM_growvector(fs->ls->L, f->abslineinfo, fs->nabslineinfo, - f->sizeabslineinfo, AbsLineInfo, INT_MAX, "lines"); - f->abslineinfo[fs->nabslineinfo].pc = pc; - f->abslineinfo[fs->nabslineinfo++].line = line; - linedif = ABSLINEINFO; /* signal that there is absolute information */ - fs->iwthabs = 1; /* restart counter */ - } - luaM_growvector(fs->ls->L, f->lineinfo, pc, f->sizelineinfo, ls_byte, - INT_MAX, "opcodes"); - f->lineinfo[pc] = cast(ls_byte, linedif); - fs->previousline = line; /* last line saved */ -} - - -/* -** Remove line information from the last instruction. -** If line information for that instruction is absolute, set 'iwthabs' -** above its max to force the new (replacing) instruction to have -** absolute line info, too. -*/ -static void removelastlineinfo (FuncState *fs) { - Proto *f = fs->f; - int pc = fs->pc - 1; /* last instruction coded */ - if (f->lineinfo[pc] != ABSLINEINFO) { /* relative line info? */ - fs->previousline -= f->lineinfo[pc]; /* correct last line saved */ - fs->iwthabs--; /* undo previous increment */ - } - else { /* absolute line information */ - lua_assert(f->abslineinfo[fs->nabslineinfo - 1].pc == pc); - fs->nabslineinfo--; /* remove it */ - fs->iwthabs = MAXIWTHABS + 1; /* force next line info to be absolute */ - } -} - - -/* -** Remove the last instruction created, correcting line information -** accordingly. -*/ -static void removelastinstruction (FuncState *fs) { - removelastlineinfo(fs); - fs->pc--; -} - - -/* -** Emit instruction 'i', checking for array sizes and saving also its -** line information. Return 'i' position. -*/ -int luaK_code (FuncState *fs, Instruction i) { - Proto *f = fs->f; - /* put new instruction in code array */ - luaM_growvector(fs->ls->L, f->code, fs->pc, f->sizecode, Instruction, - INT_MAX, "opcodes"); - f->code[fs->pc++] = i; - savelineinfo(fs, f, fs->ls->lastline); - return fs->pc - 1; /* index of new instruction */ -} - - -/* -** Format and emit an 'iABC' instruction. (Assertions check consistency -** of parameters versus opcode.) -*/ -int luaK_codeABCk (FuncState *fs, OpCode o, int A, int B, int C, int k) { - lua_assert(getOpMode(o) == iABC); - lua_assert(A <= MAXARG_A && B <= MAXARG_B && - C <= MAXARG_C && (k & ~1) == 0); - return luaK_code(fs, CREATE_ABCk(o, A, B, C, k)); -} - - -int luaK_codevABCk (FuncState *fs, OpCode o, int A, int B, int C, int k) { - lua_assert(getOpMode(o) == ivABC); - lua_assert(A <= MAXARG_A && B <= MAXARG_vB && - C <= MAXARG_vC && (k & ~1) == 0); - return luaK_code(fs, CREATE_vABCk(o, A, B, C, k)); -} - - -/* -** Format and emit an 'iABx' instruction. -*/ -int luaK_codeABx (FuncState *fs, OpCode o, int A, int Bc) { - lua_assert(getOpMode(o) == iABx); - lua_assert(A <= MAXARG_A && Bc <= MAXARG_Bx); - return luaK_code(fs, CREATE_ABx(o, A, Bc)); -} - - -/* -** Format and emit an 'iAsBx' instruction. -*/ -static int codeAsBx (FuncState *fs, OpCode o, int A, int Bc) { - int b = Bc + OFFSET_sBx; - lua_assert(getOpMode(o) == iAsBx); - lua_assert(A <= MAXARG_A && b <= MAXARG_Bx); - return luaK_code(fs, CREATE_ABx(o, A, b)); -} - - -/* -** Format and emit an 'isJ' instruction. -*/ -static int codesJ (FuncState *fs, OpCode o, int sj, int k) { - int j = sj + OFFSET_sJ; - lua_assert(getOpMode(o) == isJ); - lua_assert(j <= MAXARG_sJ && (k & ~1) == 0); - return luaK_code(fs, CREATE_sJ(o, j, k)); -} - - -/* -** Emit an "extra argument" instruction (format 'iAx') -*/ -static int codeextraarg (FuncState *fs, int A) { - lua_assert(A <= MAXARG_Ax); - return luaK_code(fs, CREATE_Ax(OP_EXTRAARG, A)); -} - - -/* -** Emit a "load constant" instruction, using either 'OP_LOADK' -** (if constant index 'k' fits in 18 bits) or an 'OP_LOADKX' -** instruction with "extra argument". -*/ -static int luaK_codek (FuncState *fs, int reg, int k) { - if (k <= MAXARG_Bx) - return luaK_codeABx(fs, OP_LOADK, reg, k); - else { - int p = luaK_codeABx(fs, OP_LOADKX, reg, 0); - codeextraarg(fs, k); - return p; - } -} - - -/* -** Check register-stack level, keeping track of its maximum size -** in field 'maxstacksize' -*/ -void luaK_checkstack (FuncState *fs, int n) { - int newstack = fs->freereg + n; - if (newstack > fs->f->maxstacksize) { - luaY_checklimit(fs, newstack, MAX_FSTACK, "registers"); - fs->f->maxstacksize = cast_byte(newstack); - } -} - - -/* -** Reserve 'n' registers in register stack -*/ -void luaK_reserveregs (FuncState *fs, int n) { - luaK_checkstack(fs, n); - fs->freereg = cast_byte(fs->freereg + n); -} - - -/* -** Free register 'reg', if it is neither a constant index nor -** a local variable. -) -*/ -static void freereg (FuncState *fs, int reg) { - if (reg >= luaY_nvarstack(fs)) { - fs->freereg--; - lua_assert(reg == fs->freereg); - } -} - - -/* -** Free two registers in proper order -*/ -static void freeregs (FuncState *fs, int r1, int r2) { - if (r1 > r2) { - freereg(fs, r1); - freereg(fs, r2); - } - else { - freereg(fs, r2); - freereg(fs, r1); - } -} - - -/* -** Free register used by expression 'e' (if any) -*/ -static void freeexp (FuncState *fs, expdesc *e) { - if (e->k == VNONRELOC) - freereg(fs, e->u.info); -} - - -/* -** Free registers used by expressions 'e1' and 'e2' (if any) in proper -** order. -*/ -static void freeexps (FuncState *fs, expdesc *e1, expdesc *e2) { - int r1 = (e1->k == VNONRELOC) ? e1->u.info : -1; - int r2 = (e2->k == VNONRELOC) ? e2->u.info : -1; - freeregs(fs, r1, r2); -} - - -/* -** Add constant 'v' to prototype's list of constants (field 'k'). -*/ -static int addk (FuncState *fs, Proto *f, TValue *v) { - lua_State *L = fs->ls->L; - int oldsize = f->sizek; - int k = fs->nk; - luaM_growvector(L, f->k, k, f->sizek, TValue, MAXARG_Ax, "constants"); - while (oldsize < f->sizek) - setnilvalue(&f->k[oldsize++]); - setobj(L, &f->k[k], v); - fs->nk++; - luaC_barrier(L, f, v); - return k; -} - - -/* -** Use scanner's table to cache position of constants in constant list -** and try to reuse constants. Because some values should not be used -** as keys (nil cannot be a key, integer keys can collapse with float -** keys), the caller must provide a useful 'key' for indexing the cache. -*/ -static int k2proto (FuncState *fs, TValue *key, TValue *v) { - TValue val; - Proto *f = fs->f; - int tag = luaH_get(fs->kcache, key, &val); /* query scanner table */ - if (!tagisempty(tag)) { /* is there an index there? */ - int k = cast_int(ivalue(&val)); - /* collisions can happen only for float keys */ - lua_assert(ttisfloat(key) || luaV_rawequalobj(&f->k[k], v)); - return k; /* reuse index */ - } - else { /* constant not found; create a new entry */ - int k = addk(fs, f, v); - /* cache it for reuse; numerical value does not need GC barrier; - table is not a metatable, so it does not need to invalidate cache */ - setivalue(&val, k); - luaH_set(fs->ls->L, fs->kcache, key, &val); - return k; - } -} - - -/* -** Add a string to list of constants and return its index. -*/ -static int stringK (FuncState *fs, TString *s) { - TValue o; - setsvalue(fs->ls->L, &o, s); - return k2proto(fs, &o, &o); /* use string itself as key */ -} - - -/* -** Add an integer to list of constants and return its index. -*/ -static int luaK_intK (FuncState *fs, lua_Integer n) { - TValue o; - setivalue(&o, n); - return k2proto(fs, &o, &o); /* use integer itself as key */ -} - -/* -** Add a float to list of constants and return its index. Floats -** with integral values need a different key, to avoid collision -** with actual integers. To that end, we add to the number its smaller -** power-of-two fraction that is still significant in its scale. -** (For doubles, the fraction would be 2^-52). -** This method is not bulletproof: different numbers may generate the -** same key (e.g., very large numbers will overflow to 'inf') and for -** floats larger than 2^53 the result is still an integer. For those -** cases, just generate a new entry. At worst, this only wastes an entry -** with a duplicate. -*/ -static int luaK_numberK (FuncState *fs, lua_Number r) { - TValue o, kv; - setfltvalue(&o, r); /* value as a TValue */ - if (r == 0) { /* handle zero as a special case */ - setpvalue(&kv, fs); /* use FuncState as index */ - return k2proto(fs, &kv, &o); /* cannot collide */ - } - else { - const int nbm = l_floatatt(MANT_DIG); - const lua_Number q = l_mathop(ldexp)(l_mathop(1.0), -nbm + 1); - const lua_Number k = r * (1 + q); /* key */ - lua_Integer ik; - setfltvalue(&kv, k); /* key as a TValue */ - if (!luaV_flttointeger(k, &ik, F2Ieq)) { /* not an integer value? */ - int n = k2proto(fs, &kv, &o); /* use key */ - if (luaV_rawequalobj(&fs->f->k[n], &o)) /* correct value? */ - return n; - } - /* else, either key is still an integer or there was a collision; - anyway, do not try to reuse constant; instead, create a new one */ - return addk(fs, fs->f, &o); - } -} - - -/* -** Add a false to list of constants and return its index. -*/ -static int boolF (FuncState *fs) { - TValue o; - setbfvalue(&o); - return k2proto(fs, &o, &o); /* use boolean itself as key */ -} - - -/* -** Add a true to list of constants and return its index. -*/ -static int boolT (FuncState *fs) { - TValue o; - setbtvalue(&o); - return k2proto(fs, &o, &o); /* use boolean itself as key */ -} - - -/* -** Add nil to list of constants and return its index. -*/ -static int nilK (FuncState *fs) { - lua_State *L = fs->ls->L; - TValue k; - /* cannot use nil as key; instead use table itself */ - sethvalue(L, &k, fs->kcache); - return k2proto(fs, &k, &G(L)->nilvalue); -} - - -/* -** Check whether 'i' can be stored in an 'sC' operand. Equivalent to -** (0 <= int2sC(i) && int2sC(i) <= MAXARG_C) but without risk of -** overflows in the hidden addition inside 'int2sC'. -*/ -static int fitsC (lua_Integer i) { - return (l_castS2U(i) + OFFSET_sC <= cast_uint(MAXARG_C)); -} - - -/* -** Check whether 'i' can be stored in an 'sBx' operand. -*/ -static int fitsBx (lua_Integer i) { - return (-OFFSET_sBx <= i && i <= MAXARG_Bx - OFFSET_sBx); -} - - -void luaK_int (FuncState *fs, int reg, lua_Integer i) { - if (fitsBx(i)) - codeAsBx(fs, OP_LOADI, reg, cast_int(i)); - else - luaK_codek(fs, reg, luaK_intK(fs, i)); -} - - -static void luaK_float (FuncState *fs, int reg, lua_Number f) { - lua_Integer fi; - if (luaV_flttointeger(f, &fi, F2Ieq) && fitsBx(fi)) - codeAsBx(fs, OP_LOADF, reg, cast_int(fi)); - else - luaK_codek(fs, reg, luaK_numberK(fs, f)); -} - - -/* -** Get the value of 'var' in a register and generate an opcode to check -** whether that register is nil. 'k' is the index of the variable name -** in the list of constants. If its value cannot be encoded in Bx, a 0 -** will use '?' for the name. -*/ -void luaK_codecheckglobal (FuncState *fs, expdesc *var, int k, int line) { - luaK_exp2anyreg(fs, var); - luaK_fixline(fs, line); - k = (k >= MAXARG_Bx) ? 0 : k + 1; - luaK_codeABx(fs, OP_ERRNNIL, var->u.info, k); - luaK_fixline(fs, line); - freeexp(fs, var); -} - - -/* -** Convert a constant in 'v' into an expression description 'e' -*/ -static void const2exp (TValue *v, expdesc *e) { - switch (ttypetag(v)) { - case LUA_VNUMINT: - e->k = VKINT; e->u.ival = ivalue(v); - break; - case LUA_VNUMFLT: - e->k = VKFLT; e->u.nval = fltvalue(v); - break; - case LUA_VFALSE: - e->k = VFALSE; - break; - case LUA_VTRUE: - e->k = VTRUE; - break; - case LUA_VNIL: - e->k = VNIL; - break; - case LUA_VSHRSTR: case LUA_VLNGSTR: - e->k = VKSTR; e->u.strval = tsvalue(v); - break; - default: lua_assert(0); - } -} - - -/* -** Fix an expression to return the number of results 'nresults'. -** 'e' must be a multi-ret expression (function call or vararg). -*/ -void luaK_setreturns (FuncState *fs, expdesc *e, int nresults) { - Instruction *pc = &getinstruction(fs, e); - luaY_checklimit(fs, nresults + 1, MAXARG_C, "multiple results"); - if (e->k == VCALL) /* expression is an open function call? */ - SETARG_C(*pc, nresults + 1); - else { - lua_assert(e->k == VVARARG); - SETARG_C(*pc, nresults + 1); - SETARG_A(*pc, fs->freereg); - luaK_reserveregs(fs, 1); - } -} - - -/* -** Convert a VKSTR to a VK -*/ -static int str2K (FuncState *fs, expdesc *e) { - lua_assert(e->k == VKSTR); - e->u.info = stringK(fs, e->u.strval); - e->k = VK; - return e->u.info; -} - - -/* -** Fix an expression to return one result. -** If expression is not a multi-ret expression (function call or -** vararg), it already returns one result, so nothing needs to be done. -** Function calls become VNONRELOC expressions (as its result comes -** fixed in the base register of the call), while vararg expressions -** become VRELOC (as OP_VARARG puts its results where it wants). -** (Calls are created returning one result, so that does not need -** to be fixed.) -*/ -void luaK_setoneret (FuncState *fs, expdesc *e) { - if (e->k == VCALL) { /* expression is an open function call? */ - /* already returns 1 value */ - lua_assert(GETARG_C(getinstruction(fs, e)) == 2); - e->k = VNONRELOC; /* result has fixed position */ - e->u.info = GETARG_A(getinstruction(fs, e)); - } - else if (e->k == VVARARG) { - SETARG_C(getinstruction(fs, e), 2); - e->k = VRELOC; /* can relocate its simple result */ - } -} - -/* -** Change a vararg parameter into a regular local variable -*/ -void luaK_vapar2local (FuncState *fs, expdesc *var) { - needvatab(fs->f); /* function will need a vararg table */ - /* now a vararg parameter is equivalent to a regular local variable */ - var->k = VLOCAL; -} - - -/* -** Ensure that expression 'e' is not a variable (nor a ). -** (Expression still may have jump lists.) -*/ -void luaK_dischargevars (FuncState *fs, expdesc *e) { - switch (e->k) { - case VCONST: { - const2exp(const2val(fs, e), e); - break; - } - case VVARGVAR: { - luaK_vapar2local(fs, e); /* turn it into a local variable */ - } /* FALLTHROUGH */ - case VLOCAL: { /* already in a register */ - int temp = e->u.var.ridx; - e->u.info = temp; /* (avoid a direct assignment; values overlap) */ - e->k = VNONRELOC; /* becomes a non-relocatable value */ - break; - } - case VUPVAL: { /* move value to some (pending) register */ - e->u.info = luaK_codeABC(fs, OP_GETUPVAL, 0, e->u.info, 0); - e->k = VRELOC; - break; - } - case VINDEXUP: { - e->u.info = luaK_codeABC(fs, OP_GETTABUP, 0, e->u.ind.t, e->u.ind.idx); - e->k = VRELOC; - break; - } - case VINDEXI: { - freereg(fs, e->u.ind.t); - e->u.info = luaK_codeABC(fs, OP_GETI, 0, e->u.ind.t, e->u.ind.idx); - e->k = VRELOC; - break; - } - case VINDEXSTR: { - freereg(fs, e->u.ind.t); - e->u.info = luaK_codeABC(fs, OP_GETFIELD, 0, e->u.ind.t, e->u.ind.idx); - e->k = VRELOC; - break; - } - case VINDEXED: { - freeregs(fs, e->u.ind.t, e->u.ind.idx); - e->u.info = luaK_codeABC(fs, OP_GETTABLE, 0, e->u.ind.t, e->u.ind.idx); - e->k = VRELOC; - break; - } - case VVARGIND: { - freeregs(fs, e->u.ind.t, e->u.ind.idx); - e->u.info = luaK_codeABC(fs, OP_GETVARG, 0, e->u.ind.t, e->u.ind.idx); - e->k = VRELOC; - break; - } - case VVARARG: case VCALL: { - luaK_setoneret(fs, e); - break; - } - default: break; /* there is one value available (somewhere) */ - } -} - - -/* -** Ensure expression value is in register 'reg', making 'e' a -** non-relocatable expression. -** (Expression still may have jump lists.) -*/ -static void discharge2reg (FuncState *fs, expdesc *e, int reg) { - luaK_dischargevars(fs, e); - switch (e->k) { - case VNIL: { - luaK_nil(fs, reg, 1); - break; - } - case VFALSE: { - luaK_codeABC(fs, OP_LOADFALSE, reg, 0, 0); - break; - } - case VTRUE: { - luaK_codeABC(fs, OP_LOADTRUE, reg, 0, 0); - break; - } - case VKSTR: { - str2K(fs, e); - } /* FALLTHROUGH */ - case VK: { - luaK_codek(fs, reg, e->u.info); - break; - } - case VKFLT: { - luaK_float(fs, reg, e->u.nval); - break; - } - case VKINT: { - luaK_int(fs, reg, e->u.ival); - break; - } - case VRELOC: { - Instruction *pc = &getinstruction(fs, e); - SETARG_A(*pc, reg); /* instruction will put result in 'reg' */ - break; - } - case VNONRELOC: { - if (reg != e->u.info) - luaK_codeABC(fs, OP_MOVE, reg, e->u.info, 0); - break; - } - default: { - lua_assert(e->k == VJMP); - return; /* nothing to do... */ - } - } - e->u.info = reg; - e->k = VNONRELOC; -} - - -/* -** Ensure expression value is in a register, making 'e' a -** non-relocatable expression. -** (Expression still may have jump lists.) -*/ -static void discharge2anyreg (FuncState *fs, expdesc *e) { - if (e->k != VNONRELOC) { /* no fixed register yet? */ - luaK_reserveregs(fs, 1); /* get a register */ - discharge2reg(fs, e, fs->freereg-1); /* put value there */ - } -} - - -static int code_loadbool (FuncState *fs, int A, OpCode op) { - luaK_getlabel(fs); /* those instructions may be jump targets */ - return luaK_codeABC(fs, op, A, 0, 0); -} - - -/* -** check whether list has any jump that do not produce a value -** or produce an inverted value -*/ -static int need_value (FuncState *fs, int list) { - for (; list != NO_JUMP; list = getjump(fs, list)) { - Instruction i = *getjumpcontrol(fs, list); - if (GET_OPCODE(i) != OP_TESTSET) return 1; - } - return 0; /* not found */ -} - - -/* -** Ensures final expression result (which includes results from its -** jump lists) is in register 'reg'. -** If expression has jumps, need to patch these jumps either to -** its final position or to "load" instructions (for those tests -** that do not produce values). -*/ -static void exp2reg (FuncState *fs, expdesc *e, int reg) { - discharge2reg(fs, e, reg); - if (e->k == VJMP) /* expression itself is a test? */ - luaK_concat(fs, &e->t, e->u.info); /* put this jump in 't' list */ - if (hasjumps(e)) { - int final; /* position after whole expression */ - int p_f = NO_JUMP; /* position of an eventual LOAD false */ - int p_t = NO_JUMP; /* position of an eventual LOAD true */ - if (need_value(fs, e->t) || need_value(fs, e->f)) { - int fj = (e->k == VJMP) ? NO_JUMP : luaK_jump(fs); - p_f = code_loadbool(fs, reg, OP_LFALSESKIP); /* skip next inst. */ - p_t = code_loadbool(fs, reg, OP_LOADTRUE); - /* jump around these booleans if 'e' is not a test */ - luaK_patchtohere(fs, fj); - } - final = luaK_getlabel(fs); - patchlistaux(fs, e->f, final, reg, p_f); - patchlistaux(fs, e->t, final, reg, p_t); - } - e->f = e->t = NO_JUMP; - e->u.info = reg; - e->k = VNONRELOC; -} - - -/* -** Ensures final expression result is in next available register. -*/ -void luaK_exp2nextreg (FuncState *fs, expdesc *e) { - luaK_dischargevars(fs, e); - freeexp(fs, e); - luaK_reserveregs(fs, 1); - exp2reg(fs, e, fs->freereg - 1); -} - - -/* -** Ensures final expression result is in some (any) register -** and return that register. -*/ -int luaK_exp2anyreg (FuncState *fs, expdesc *e) { - luaK_dischargevars(fs, e); - if (e->k == VNONRELOC) { /* expression already has a register? */ - if (!hasjumps(e)) /* no jumps? */ - return e->u.info; /* result is already in a register */ - if (e->u.info >= luaY_nvarstack(fs)) { /* reg. is not a local? */ - exp2reg(fs, e, e->u.info); /* put final result in it */ - return e->u.info; - } - /* else expression has jumps and cannot change its register - to hold the jump values, because it is a local variable. - Go through to the default case. */ - } - luaK_exp2nextreg(fs, e); /* default: use next available register */ - return e->u.info; -} - - -/* -** Ensures final expression result is either in a register, -** in an upvalue, or it is the vararg parameter. -*/ -void luaK_exp2anyregup (FuncState *fs, expdesc *e) { - if ((e->k != VUPVAL && e->k != VVARGVAR) || hasjumps(e)) - luaK_exp2anyreg(fs, e); -} - - -/* -** Ensures final expression result is either in a register -** or it is a constant. -*/ -void luaK_exp2val (FuncState *fs, expdesc *e) { - if (e->k == VJMP || hasjumps(e)) - luaK_exp2anyreg(fs, e); - else - luaK_dischargevars(fs, e); -} - - -/* -** Try to make 'e' a K expression with an index in the range of R/K -** indices. Return true iff succeeded. -*/ -static int luaK_exp2K (FuncState *fs, expdesc *e) { - if (!hasjumps(e)) { - int info; - switch (e->k) { /* move constants to 'k' */ - case VTRUE: info = boolT(fs); break; - case VFALSE: info = boolF(fs); break; - case VNIL: info = nilK(fs); break; - case VKINT: info = luaK_intK(fs, e->u.ival); break; - case VKFLT: info = luaK_numberK(fs, e->u.nval); break; - case VKSTR: info = stringK(fs, e->u.strval); break; - case VK: info = e->u.info; break; - default: return 0; /* not a constant */ - } - if (info <= MAXINDEXRK) { /* does constant fit in 'argC'? */ - e->k = VK; /* make expression a 'K' expression */ - e->u.info = info; - return 1; - } - } - /* else, expression doesn't fit; leave it unchanged */ - return 0; -} - - -/* -** Ensures final expression result is in a valid R/K index -** (that is, it is either in a register or in 'k' with an index -** in the range of R/K indices). -** Returns 1 iff expression is K. -*/ -static int exp2RK (FuncState *fs, expdesc *e) { - if (luaK_exp2K(fs, e)) - return 1; - else { /* not a constant in the right range: put it in a register */ - luaK_exp2anyreg(fs, e); - return 0; - } -} - - -static void codeABRK (FuncState *fs, OpCode o, int A, int B, - expdesc *ec) { - int k = exp2RK(fs, ec); - luaK_codeABCk(fs, o, A, B, ec->u.info, k); -} - - -/* -** Generate code to store result of expression 'ex' into variable 'var'. -*/ -void luaK_storevar (FuncState *fs, expdesc *var, expdesc *ex) { - switch (var->k) { - case VLOCAL: { - freeexp(fs, ex); - exp2reg(fs, ex, var->u.var.ridx); /* compute 'ex' into proper place */ - return; - } - case VUPVAL: { - int e = luaK_exp2anyreg(fs, ex); - luaK_codeABC(fs, OP_SETUPVAL, e, var->u.info, 0); - break; - } - case VINDEXUP: { - codeABRK(fs, OP_SETTABUP, var->u.ind.t, var->u.ind.idx, ex); - break; - } - case VINDEXI: { - codeABRK(fs, OP_SETI, var->u.ind.t, var->u.ind.idx, ex); - break; - } - case VINDEXSTR: { - codeABRK(fs, OP_SETFIELD, var->u.ind.t, var->u.ind.idx, ex); - break; - } - case VVARGIND: { - needvatab(fs->f); /* function will need a vararg table */ - /* now, assignment is to a regular table */ - } /* FALLTHROUGH */ - case VINDEXED: { - codeABRK(fs, OP_SETTABLE, var->u.ind.t, var->u.ind.idx, ex); - break; - } - default: lua_assert(0); /* invalid var kind to store */ - } - freeexp(fs, ex); -} - - -/* -** Negate condition 'e' (where 'e' is a comparison). -*/ -static void negatecondition (FuncState *fs, expdesc *e) { - Instruction *pc = getjumpcontrol(fs, e->u.info); - lua_assert(testTMode(GET_OPCODE(*pc)) && GET_OPCODE(*pc) != OP_TESTSET && - GET_OPCODE(*pc) != OP_TEST); - SETARG_k(*pc, (GETARG_k(*pc) ^ 1)); -} - - -/* -** Emit instruction to jump if 'e' is 'cond' (that is, if 'cond' -** is true, code will jump if 'e' is true.) Return jump position. -** Optimize when 'e' is 'not' something, inverting the condition -** and removing the 'not'. -*/ -static int jumponcond (FuncState *fs, expdesc *e, int cond) { - if (e->k == VRELOC) { - Instruction ie = getinstruction(fs, e); - if (GET_OPCODE(ie) == OP_NOT) { - removelastinstruction(fs); /* remove previous OP_NOT */ - return condjump(fs, OP_TEST, GETARG_B(ie), 0, 0, !cond); - } - /* else go through */ - } - discharge2anyreg(fs, e); - freeexp(fs, e); - return condjump(fs, OP_TESTSET, NO_REG, e->u.info, 0, cond); -} - - -/* -** Emit code to go through if 'e' is true, jump otherwise. -*/ -void luaK_goiftrue (FuncState *fs, expdesc *e) { - int pc; /* pc of new jump */ - luaK_dischargevars(fs, e); - switch (e->k) { - case VJMP: { /* condition? */ - negatecondition(fs, e); /* jump when it is false */ - pc = e->u.info; /* save jump position */ - break; - } - case VK: case VKFLT: case VKINT: case VKSTR: case VTRUE: { - pc = NO_JUMP; /* always true; do nothing */ - break; - } - default: { - pc = jumponcond(fs, e, 0); /* jump when false */ - break; - } - } - luaK_concat(fs, &e->f, pc); /* insert new jump in false list */ - luaK_patchtohere(fs, e->t); /* true list jumps to here (to go through) */ - e->t = NO_JUMP; -} - - -/* -** Emit code to go through if 'e' is false, jump otherwise. -*/ -static void luaK_goiffalse (FuncState *fs, expdesc *e) { - int pc; /* pc of new jump */ - luaK_dischargevars(fs, e); - switch (e->k) { - case VJMP: { - pc = e->u.info; /* already jump if true */ - break; - } - case VNIL: case VFALSE: { - pc = NO_JUMP; /* always false; do nothing */ - break; - } - default: { - pc = jumponcond(fs, e, 1); /* jump if true */ - break; - } - } - luaK_concat(fs, &e->t, pc); /* insert new jump in 't' list */ - luaK_patchtohere(fs, e->f); /* false list jumps to here (to go through) */ - e->f = NO_JUMP; -} - - -/* -** Code 'not e', doing constant folding. -*/ -static void codenot (FuncState *fs, expdesc *e) { - switch (e->k) { - case VNIL: case VFALSE: { - e->k = VTRUE; /* true == not nil == not false */ - break; - } - case VK: case VKFLT: case VKINT: case VKSTR: case VTRUE: { - e->k = VFALSE; /* false == not "x" == not 0.5 == not 1 == not true */ - break; - } - case VJMP: { - negatecondition(fs, e); - break; - } - case VRELOC: - case VNONRELOC: { - discharge2anyreg(fs, e); - freeexp(fs, e); - e->u.info = luaK_codeABC(fs, OP_NOT, 0, e->u.info, 0); - e->k = VRELOC; - break; - } - default: lua_assert(0); /* cannot happen */ - } - /* interchange true and false lists */ - { int temp = e->f; e->f = e->t; e->t = temp; } - removevalues(fs, e->f); /* values are useless when negated */ - removevalues(fs, e->t); -} - - -/* -** Check whether expression 'e' is a short literal string -*/ -static int isKstr (FuncState *fs, expdesc *e) { - return (e->k == VK && !hasjumps(e) && e->u.info <= MAXINDEXRK && - ttisshrstring(&fs->f->k[e->u.info])); -} - -/* -** Check whether expression 'e' is a literal integer. -*/ -static int isKint (expdesc *e) { - return (e->k == VKINT && !hasjumps(e)); -} - - -/* -** Check whether expression 'e' is a literal integer in -** proper range to fit in register C -*/ -static int isCint (expdesc *e) { - return isKint(e) && (l_castS2U(e->u.ival) <= l_castS2U(MAXARG_C)); -} - - -/* -** Check whether expression 'e' is a literal integer in -** proper range to fit in register sC -*/ -static int isSCint (expdesc *e) { - return isKint(e) && fitsC(e->u.ival); -} - - -/* -** Check whether expression 'e' is a literal integer or float in -** proper range to fit in a register (sB or sC). -*/ -static int isSCnumber (expdesc *e, int *pi, int *isfloat) { - lua_Integer i; - if (e->k == VKINT) - i = e->u.ival; - else if (e->k == VKFLT && luaV_flttointeger(e->u.nval, &i, F2Ieq)) - *isfloat = 1; - else - return 0; /* not a number */ - if (!hasjumps(e) && fitsC(i)) { - *pi = int2sC(cast_int(i)); - return 1; - } - else - return 0; -} - - -/* -** Emit SELF instruction or equivalent: the code will convert -** expression 'e' into 'e.key(e,'. -*/ -void luaK_self (FuncState *fs, expdesc *e, expdesc *key) { - int ereg, base; - luaK_exp2anyreg(fs, e); - ereg = e->u.info; /* register where 'e' (the receiver) was placed */ - freeexp(fs, e); - base = e->u.info = fs->freereg; /* base register for op_self */ - e->k = VNONRELOC; /* self expression has a fixed register */ - luaK_reserveregs(fs, 2); /* method and 'self' produced by op_self */ - lua_assert(key->k == VKSTR); - /* is method name a short string in a valid K index? */ - if (strisshr(key->u.strval) && luaK_exp2K(fs, key)) { - /* can use 'self' opcode */ - luaK_codeABCk(fs, OP_SELF, base, ereg, key->u.info, 0); - } - else { /* cannot use 'self' opcode; use move+gettable */ - luaK_exp2anyreg(fs, key); /* put method name in a register */ - luaK_codeABC(fs, OP_MOVE, base + 1, ereg, 0); /* copy self to base+1 */ - luaK_codeABC(fs, OP_GETTABLE, base, ereg, key->u.info); /* get method */ - } - freeexp(fs, key); -} - - -/* auxiliary function to define indexing expressions */ -static void fillidxk (expdesc *t, int idx, expkind k) { - t->u.ind.idx = cast_byte(idx); - t->k = k; -} - - -/* -** Create expression 't[k]'. 't' must have its final result already in a -** register or upvalue. Upvalues can only be indexed by literal strings. -** Keys can be literal strings in the constant table or arbitrary -** values in registers. -*/ -void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) { - int keystr = -1; - if (k->k == VKSTR) - keystr = str2K(fs, k); - lua_assert(!hasjumps(t) && - (t->k == VLOCAL || t->k == VVARGVAR || - t->k == VNONRELOC || t->k == VUPVAL)); - if (t->k == VUPVAL && !isKstr(fs, k)) /* upvalue indexed by non 'Kstr'? */ - luaK_exp2anyreg(fs, t); /* put it in a register */ - if (t->k == VUPVAL) { - lu_byte temp = cast_byte(t->u.info); /* upvalue index */ - t->u.ind.t = temp; /* (avoid a direct assignment; values overlap) */ - lua_assert(isKstr(fs, k)); - fillidxk(t, k->u.info, VINDEXUP); /* literal short string */ - } - else if (t->k == VVARGVAR) { /* indexing the vararg parameter? */ - int kreg = luaK_exp2anyreg(fs, k); /* put key in some register */ - lu_byte vreg = cast_byte(t->u.var.ridx); /* register with vararg param. */ - lua_assert(vreg == fs->f->numparams); - t->u.ind.t = vreg; /* (avoid a direct assignment; values may overlap?) */ - fillidxk(t, kreg, VVARGIND); /* 't' represents 'vararg[k]' */ - } - else { - /* register index of the table */ - lu_byte temp = cast_byte((t->k == VLOCAL) ? t->u.var.ridx: t->u.info); - t->u.ind.t = temp; /* (avoid a direct assignment; values may overlap?) */ - if (isKstr(fs, k)) - fillidxk(t, k->u.info, VINDEXSTR); /* literal short string */ - else if (isCint(k)) /* int. constant in proper range? */ - fillidxk(t, cast_int(k->u.ival), VINDEXI); - else - fillidxk(t, luaK_exp2anyreg(fs, k), VINDEXED); /* register */ - } - t->u.ind.keystr = keystr; /* string index in 'k' */ - t->u.ind.ro = 0; /* by default, not read-only */ -} - - -/* -** Return false if folding can raise an error. -** Bitwise operations need operands convertible to integers; division -** operations cannot have 0 as divisor. -*/ -static int validop (int op, TValue *v1, TValue *v2) { - switch (op) { - case LUA_OPBAND: case LUA_OPBOR: case LUA_OPBXOR: - case LUA_OPSHL: case LUA_OPSHR: case LUA_OPBNOT: { /* conversion errors */ - lua_Integer i; - return (luaV_tointegerns(v1, &i, LUA_FLOORN2I) && - luaV_tointegerns(v2, &i, LUA_FLOORN2I)); - } - case LUA_OPDIV: case LUA_OPIDIV: case LUA_OPMOD: /* division by 0 */ - return (nvalue(v2) != 0); - default: return 1; /* everything else is valid */ - } -} - - -/* -** Try to "constant-fold" an operation; return 1 iff successful. -** (In this case, 'e1' has the final result.) -*/ -static int constfolding (FuncState *fs, int op, expdesc *e1, - const expdesc *e2) { - TValue v1, v2, res; - if (!tonumeral(e1, &v1) || !tonumeral(e2, &v2) || !validop(op, &v1, &v2)) - return 0; /* non-numeric operands or not safe to fold */ - luaO_rawarith(fs->ls->L, op, &v1, &v2, &res); /* does operation */ - if (ttisinteger(&res)) { - e1->k = VKINT; - e1->u.ival = ivalue(&res); - } - else { /* folds neither NaN nor 0.0 (to avoid problems with -0.0) */ - lua_Number n = fltvalue(&res); - if (luai_numisnan(n) || n == 0) - return 0; - e1->k = VKFLT; - e1->u.nval = n; - } - return 1; -} - - -/* -** Convert a BinOpr to an OpCode (ORDER OPR - ORDER OP) -*/ -l_sinline OpCode binopr2op (BinOpr opr, BinOpr baser, OpCode base) { - lua_assert(baser <= opr && - ((baser == OPR_ADD && opr <= OPR_SHR) || - (baser == OPR_LT && opr <= OPR_LE))); - return cast(OpCode, (cast_int(opr) - cast_int(baser)) + cast_int(base)); -} - - -/* -** Convert a UnOpr to an OpCode (ORDER OPR - ORDER OP) -*/ -l_sinline OpCode unopr2op (UnOpr opr) { - return cast(OpCode, (cast_int(opr) - cast_int(OPR_MINUS)) + - cast_int(OP_UNM)); -} - - -/* -** Convert a BinOpr to a tag method (ORDER OPR - ORDER TM) -*/ -l_sinline TMS binopr2TM (BinOpr opr) { - lua_assert(OPR_ADD <= opr && opr <= OPR_SHR); - return cast(TMS, (cast_int(opr) - cast_int(OPR_ADD)) + cast_int(TM_ADD)); -} - - -/* -** Emit code for unary expressions that "produce values" -** (everything but 'not'). -** Expression to produce final result will be encoded in 'e'. -*/ -static void codeunexpval (FuncState *fs, OpCode op, expdesc *e, int line) { - int r = luaK_exp2anyreg(fs, e); /* opcodes operate only on registers */ - freeexp(fs, e); - e->u.info = luaK_codeABC(fs, op, 0, r, 0); /* generate opcode */ - e->k = VRELOC; /* all those operations are relocatable */ - luaK_fixline(fs, line); -} - - -/* -** Emit code for binary expressions that "produce values" -** (everything but logical operators 'and'/'or' and comparison -** operators). -** Expression to produce final result will be encoded in 'e1'. -*/ -static void finishbinexpval (FuncState *fs, expdesc *e1, expdesc *e2, - OpCode op, int v2, int flip, int line, - OpCode mmop, TMS event) { - int v1 = luaK_exp2anyreg(fs, e1); - int pc = luaK_codeABCk(fs, op, 0, v1, v2, 0); - freeexps(fs, e1, e2); - e1->u.info = pc; - e1->k = VRELOC; /* all those operations are relocatable */ - luaK_fixline(fs, line); - luaK_codeABCk(fs, mmop, v1, v2, cast_int(event), flip); /* metamethod */ - luaK_fixline(fs, line); -} - - -/* -** Emit code for binary expressions that "produce values" over -** two registers. -*/ -static void codebinexpval (FuncState *fs, BinOpr opr, - expdesc *e1, expdesc *e2, int line) { - OpCode op = binopr2op(opr, OPR_ADD, OP_ADD); - int v2 = luaK_exp2anyreg(fs, e2); /* make sure 'e2' is in a register */ - /* 'e1' must be already in a register or it is a constant */ - lua_assert((VNIL <= e1->k && e1->k <= VKSTR) || - e1->k == VNONRELOC || e1->k == VRELOC); - lua_assert(OP_ADD <= op && op <= OP_SHR); - finishbinexpval(fs, e1, e2, op, v2, 0, line, OP_MMBIN, binopr2TM(opr)); -} - - -/* -** Code binary operators with immediate operands. -*/ -static void codebini (FuncState *fs, OpCode op, - expdesc *e1, expdesc *e2, int flip, int line, - TMS event) { - int v2 = int2sC(cast_int(e2->u.ival)); /* immediate operand */ - lua_assert(e2->k == VKINT); - finishbinexpval(fs, e1, e2, op, v2, flip, line, OP_MMBINI, event); -} - - -/* -** Code binary operators with K operand. -*/ -static void codebinK (FuncState *fs, BinOpr opr, - expdesc *e1, expdesc *e2, int flip, int line) { - TMS event = binopr2TM(opr); - int v2 = e2->u.info; /* K index */ - OpCode op = binopr2op(opr, OPR_ADD, OP_ADDK); - finishbinexpval(fs, e1, e2, op, v2, flip, line, OP_MMBINK, event); -} - - -/* Try to code a binary operator negating its second operand. -** For the metamethod, 2nd operand must keep its original value. -*/ -static int finishbinexpneg (FuncState *fs, expdesc *e1, expdesc *e2, - OpCode op, int line, TMS event) { - if (!isKint(e2)) - return 0; /* not an integer constant */ - else { - lua_Integer i2 = e2->u.ival; - if (!(fitsC(i2) && fitsC(-i2))) - return 0; /* not in the proper range */ - else { /* operating a small integer constant */ - int v2 = cast_int(i2); - finishbinexpval(fs, e1, e2, op, int2sC(-v2), 0, line, OP_MMBINI, event); - /* correct metamethod argument */ - SETARG_B(fs->f->code[fs->pc - 1], int2sC(v2)); - return 1; /* successfully coded */ - } - } -} - - -static void swapexps (expdesc *e1, expdesc *e2) { - expdesc temp = *e1; *e1 = *e2; *e2 = temp; /* swap 'e1' and 'e2' */ -} - - -/* -** Code binary operators with no constant operand. -*/ -static void codebinNoK (FuncState *fs, BinOpr opr, - expdesc *e1, expdesc *e2, int flip, int line) { - if (flip) - swapexps(e1, e2); /* back to original order */ - codebinexpval(fs, opr, e1, e2, line); /* use standard operators */ -} - - -/* -** Code arithmetic operators ('+', '-', ...). If second operand is a -** constant in the proper range, use variant opcodes with K operands. -*/ -static void codearith (FuncState *fs, BinOpr opr, - expdesc *e1, expdesc *e2, int flip, int line) { - if (tonumeral(e2, NULL) && luaK_exp2K(fs, e2)) /* K operand? */ - codebinK(fs, opr, e1, e2, flip, line); - else /* 'e2' is neither an immediate nor a K operand */ - codebinNoK(fs, opr, e1, e2, flip, line); -} - - -/* -** Code commutative operators ('+', '*'). If first operand is a -** numeric constant, change order of operands to try to use an -** immediate or K operator. -*/ -static void codecommutative (FuncState *fs, BinOpr op, - expdesc *e1, expdesc *e2, int line) { - int flip = 0; - if (tonumeral(e1, NULL)) { /* is first operand a numeric constant? */ - swapexps(e1, e2); /* change order */ - flip = 1; - } - if (op == OPR_ADD && isSCint(e2)) /* immediate operand? */ - codebini(fs, OP_ADDI, e1, e2, flip, line, TM_ADD); - else - codearith(fs, op, e1, e2, flip, line); -} - - -/* -** Code bitwise operations; they are all commutative, so the function -** tries to put an integer constant as the 2nd operand (a K operand). -*/ -static void codebitwise (FuncState *fs, BinOpr opr, - expdesc *e1, expdesc *e2, int line) { - int flip = 0; - if (e1->k == VKINT) { - swapexps(e1, e2); /* 'e2' will be the constant operand */ - flip = 1; - } - if (e2->k == VKINT && luaK_exp2K(fs, e2)) /* K operand? */ - codebinK(fs, opr, e1, e2, flip, line); - else /* no constants */ - codebinNoK(fs, opr, e1, e2, flip, line); -} - - -/* -** Emit code for order comparisons. When using an immediate operand, -** 'isfloat' tells whether the original value was a float. -*/ -static void codeorder (FuncState *fs, BinOpr opr, expdesc *e1, expdesc *e2) { - int r1, r2; - int im; - int isfloat = 0; - OpCode op; - if (isSCnumber(e2, &im, &isfloat)) { - /* use immediate operand */ - r1 = luaK_exp2anyreg(fs, e1); - r2 = im; - op = binopr2op(opr, OPR_LT, OP_LTI); - } - else if (isSCnumber(e1, &im, &isfloat)) { - /* transform (A < B) to (B > A) and (A <= B) to (B >= A) */ - r1 = luaK_exp2anyreg(fs, e2); - r2 = im; - op = binopr2op(opr, OPR_LT, OP_GTI); - } - else { /* regular case, compare two registers */ - r1 = luaK_exp2anyreg(fs, e1); - r2 = luaK_exp2anyreg(fs, e2); - op = binopr2op(opr, OPR_LT, OP_LT); - } - freeexps(fs, e1, e2); - e1->u.info = condjump(fs, op, r1, r2, isfloat, 1); - e1->k = VJMP; -} - - -/* -** Emit code for equality comparisons ('==', '~='). -** 'e1' was already put as RK by 'luaK_infix'. -*/ -static void codeeq (FuncState *fs, BinOpr opr, expdesc *e1, expdesc *e2) { - int r1, r2; - int im; - int isfloat = 0; /* not needed here, but kept for symmetry */ - OpCode op; - if (e1->k != VNONRELOC) { - lua_assert(e1->k == VK || e1->k == VKINT || e1->k == VKFLT); - swapexps(e1, e2); - } - r1 = luaK_exp2anyreg(fs, e1); /* 1st expression must be in register */ - if (isSCnumber(e2, &im, &isfloat)) { - op = OP_EQI; - r2 = im; /* immediate operand */ - } - else if (exp2RK(fs, e2)) { /* 2nd expression is constant? */ - op = OP_EQK; - r2 = e2->u.info; /* constant index */ - } - else { - op = OP_EQ; /* will compare two registers */ - r2 = luaK_exp2anyreg(fs, e2); - } - freeexps(fs, e1, e2); - e1->u.info = condjump(fs, op, r1, r2, isfloat, (opr == OPR_EQ)); - e1->k = VJMP; -} - - -/* -** Apply prefix operation 'op' to expression 'e'. -*/ -void luaK_prefix (FuncState *fs, UnOpr opr, expdesc *e, int line) { - static const expdesc ef = {VKINT, {0}, NO_JUMP, NO_JUMP}; - luaK_dischargevars(fs, e); - switch (opr) { - case OPR_MINUS: case OPR_BNOT: /* use 'ef' as fake 2nd operand */ - if (constfolding(fs, cast_int(opr + LUA_OPUNM), e, &ef)) - break; - /* else */ /* FALLTHROUGH */ - case OPR_LEN: - codeunexpval(fs, unopr2op(opr), e, line); - break; - case OPR_NOT: codenot(fs, e); break; - default: lua_assert(0); - } -} - - -/* -** Process 1st operand 'v' of binary operation 'op' before reading -** 2nd operand. -*/ -void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) { - luaK_dischargevars(fs, v); - switch (op) { - case OPR_AND: { - luaK_goiftrue(fs, v); /* go ahead only if 'v' is true */ - break; - } - case OPR_OR: { - luaK_goiffalse(fs, v); /* go ahead only if 'v' is false */ - break; - } - case OPR_CONCAT: { - luaK_exp2nextreg(fs, v); /* operand must be on the stack */ - break; - } - case OPR_ADD: case OPR_SUB: - case OPR_MUL: case OPR_DIV: case OPR_IDIV: - case OPR_MOD: case OPR_POW: - case OPR_BAND: case OPR_BOR: case OPR_BXOR: - case OPR_SHL: case OPR_SHR: { - if (!tonumeral(v, NULL)) - luaK_exp2anyreg(fs, v); - /* else keep numeral, which may be folded or used as an immediate - operand */ - break; - } - case OPR_EQ: case OPR_NE: { - if (!tonumeral(v, NULL)) - exp2RK(fs, v); - /* else keep numeral, which may be an immediate operand */ - break; - } - case OPR_LT: case OPR_LE: - case OPR_GT: case OPR_GE: { - int dummy, dummy2; - if (!isSCnumber(v, &dummy, &dummy2)) - luaK_exp2anyreg(fs, v); - /* else keep numeral, which may be an immediate operand */ - break; - } - default: lua_assert(0); - } -} - -/* -** Create code for '(e1 .. e2)'. -** For '(e1 .. e2.1 .. e2.2)' (which is '(e1 .. (e2.1 .. e2.2))', -** because concatenation is right associative), merge both CONCATs. -*/ -static void codeconcat (FuncState *fs, expdesc *e1, expdesc *e2, int line) { - Instruction *ie2 = previousinstruction(fs); - if (GET_OPCODE(*ie2) == OP_CONCAT) { /* is 'e2' a concatenation? */ - int n = GETARG_B(*ie2); /* # of elements concatenated in 'e2' */ - lua_assert(e1->u.info + 1 == GETARG_A(*ie2)); - freeexp(fs, e2); - SETARG_A(*ie2, e1->u.info); /* correct first element ('e1') */ - SETARG_B(*ie2, n + 1); /* will concatenate one more element */ - } - else { /* 'e2' is not a concatenation */ - luaK_codeABC(fs, OP_CONCAT, e1->u.info, 2, 0); /* new concat opcode */ - freeexp(fs, e2); - luaK_fixline(fs, line); - } -} - - -/* -** Finalize code for binary operation, after reading 2nd operand. -*/ -void luaK_posfix (FuncState *fs, BinOpr opr, - expdesc *e1, expdesc *e2, int line) { - luaK_dischargevars(fs, e2); - if (foldbinop(opr) && constfolding(fs, cast_int(opr + LUA_OPADD), e1, e2)) - return; /* done by folding */ - switch (opr) { - case OPR_AND: { - lua_assert(e1->t == NO_JUMP); /* list closed by 'luaK_infix' */ - luaK_concat(fs, &e2->f, e1->f); - *e1 = *e2; - break; - } - case OPR_OR: { - lua_assert(e1->f == NO_JUMP); /* list closed by 'luaK_infix' */ - luaK_concat(fs, &e2->t, e1->t); - *e1 = *e2; - break; - } - case OPR_CONCAT: { /* e1 .. e2 */ - luaK_exp2nextreg(fs, e2); - codeconcat(fs, e1, e2, line); - break; - } - case OPR_ADD: case OPR_MUL: { - codecommutative(fs, opr, e1, e2, line); - break; - } - case OPR_SUB: { - if (finishbinexpneg(fs, e1, e2, OP_ADDI, line, TM_SUB)) - break; /* coded as (r1 + -I) */ - /* ELSE */ - } /* FALLTHROUGH */ - case OPR_DIV: case OPR_IDIV: case OPR_MOD: case OPR_POW: { - codearith(fs, opr, e1, e2, 0, line); - break; - } - case OPR_BAND: case OPR_BOR: case OPR_BXOR: { - codebitwise(fs, opr, e1, e2, line); - break; - } - case OPR_SHL: { - if (isSCint(e1)) { - swapexps(e1, e2); - codebini(fs, OP_SHLI, e1, e2, 1, line, TM_SHL); /* I << r2 */ - } - else if (finishbinexpneg(fs, e1, e2, OP_SHRI, line, TM_SHL)) { - /* coded as (r1 >> -I) */; - } - else /* regular case (two registers) */ - codebinexpval(fs, opr, e1, e2, line); - break; - } - case OPR_SHR: { - if (isSCint(e2)) - codebini(fs, OP_SHRI, e1, e2, 0, line, TM_SHR); /* r1 >> I */ - else /* regular case (two registers) */ - codebinexpval(fs, opr, e1, e2, line); - break; - } - case OPR_EQ: case OPR_NE: { - codeeq(fs, opr, e1, e2); - break; - } - case OPR_GT: case OPR_GE: { - /* '(a > b)' <=> '(b < a)'; '(a >= b)' <=> '(b <= a)' */ - swapexps(e1, e2); - opr = cast(BinOpr, (opr - OPR_GT) + OPR_LT); - } /* FALLTHROUGH */ - case OPR_LT: case OPR_LE: { - codeorder(fs, opr, e1, e2); - break; - } - default: lua_assert(0); - } -} - - -/* -** Change line information associated with current position, by removing -** previous info and adding it again with new line. -*/ -void luaK_fixline (FuncState *fs, int line) { - removelastlineinfo(fs); - savelineinfo(fs, fs->f, line); -} - - -void luaK_settablesize (FuncState *fs, int pc, int ra, int asize, int hsize) { - Instruction *inst = &fs->f->code[pc]; - int extra = asize / (MAXARG_vC + 1); /* higher bits of array size */ - int rc = asize % (MAXARG_vC + 1); /* lower bits of array size */ - int k = (extra > 0); /* true iff needs extra argument */ - hsize = (hsize != 0) ? luaO_ceillog2(cast_uint(hsize)) + 1 : 0; - *inst = CREATE_vABCk(OP_NEWTABLE, ra, hsize, rc, k); - *(inst + 1) = CREATE_Ax(OP_EXTRAARG, extra); -} - - -/* -** Emit a SETLIST instruction. -** 'base' is register that keeps table; -** 'nelems' is #table plus those to be stored now; -** 'tostore' is number of values (in registers 'base + 1',...) to add to -** table (or LUA_MULTRET to add up to stack top). -*/ -void luaK_setlist (FuncState *fs, int base, int nelems, int tostore) { - lua_assert(tostore != 0); - if (tostore == LUA_MULTRET) - tostore = 0; - if (nelems <= MAXARG_vC) - luaK_codevABCk(fs, OP_SETLIST, base, tostore, nelems, 0); - else { - int extra = nelems / (MAXARG_vC + 1); - nelems %= (MAXARG_vC + 1); - luaK_codevABCk(fs, OP_SETLIST, base, tostore, nelems, 1); - codeextraarg(fs, extra); - } - fs->freereg = cast_byte(base + 1); /* free registers with list values */ -} - - -/* -** return the final target of a jump (skipping jumps to jumps) -*/ -static int finaltarget (Instruction *code, int i) { - int count; - for (count = 0; count < 100; count++) { /* avoid infinite loops */ - Instruction pc = code[i]; - if (GET_OPCODE(pc) != OP_JMP) - break; - else - i += GETARG_sJ(pc) + 1; - } - return i; -} - - -/* -** Do a final pass over the code of a function, doing small peephole -** optimizations and adjustments. -*/ -#include "lopnames.h" -void luaK_finish (FuncState *fs) { - int i; - Proto *p = fs->f; - if (p->flag & PF_VATAB) /* will it use a vararg table? */ - p->flag &= cast_byte(~PF_VAHID); /* then it will not use hidden args. */ - for (i = 0; i < fs->pc; i++) { - Instruction *pc = &p->code[i]; - lua_assert(i == 0 || luaP_isOT(*(pc - 1)) == luaP_isIT(*pc)); - switch (GET_OPCODE(*pc)) { - case OP_RETURN0: case OP_RETURN1: { - if (!(fs->needclose || (p->flag & PF_VAHID))) - break; /* no extra work */ - /* else use OP_RETURN to do the extra work */ - SET_OPCODE(*pc, OP_RETURN); - } /* FALLTHROUGH */ - case OP_RETURN: case OP_TAILCALL: { - if (fs->needclose) - SETARG_k(*pc, 1); /* signal that it needs to close */ - if (p->flag & PF_VAHID) /* does it use hidden arguments? */ - SETARG_C(*pc, p->numparams + 1); /* signal that */ - break; - } - case OP_GETVARG: { - if (p->flag & PF_VATAB) /* function has a vararg table? */ - SET_OPCODE(*pc, OP_GETTABLE); /* must get vararg there */ - break; - } - case OP_VARARG: { - if (p->flag & PF_VATAB) /* function has a vararg table? */ - SETARG_k(*pc, 1); /* must get vararg there */ - break; - } - case OP_JMP: { /* to optimize jumps to jumps */ - int target = finaltarget(p->code, i); - fixjump(fs, i, target); /* jump directly to final target */ - break; - } - default: break; - } - } -} diff --git a/lib/lua/lcode.h b/lib/lua/lcode.h deleted file mode 100644 index 09e5c80..0000000 --- a/lib/lua/lcode.h +++ /dev/null @@ -1,105 +0,0 @@ -/* -** $Id: lcode.h $ -** Code generator for Lua -** See Copyright Notice in lua.h -*/ - -#ifndef lcode_h -#define lcode_h - -#include "llex.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lparser.h" - - -/* -** Marks the end of a patch list. It is an invalid value both as an absolute -** address, and as a list link (would link an element to itself). -*/ -#define NO_JUMP (-1) - - -/* -** grep "ORDER OPR" if you change these enums (ORDER OP) -*/ -typedef enum BinOpr { - /* arithmetic operators */ - OPR_ADD, OPR_SUB, OPR_MUL, OPR_MOD, OPR_POW, - OPR_DIV, OPR_IDIV, - /* bitwise operators */ - OPR_BAND, OPR_BOR, OPR_BXOR, - OPR_SHL, OPR_SHR, - /* string operator */ - OPR_CONCAT, - /* comparison operators */ - OPR_EQ, OPR_LT, OPR_LE, - OPR_NE, OPR_GT, OPR_GE, - /* logical operators */ - OPR_AND, OPR_OR, - OPR_NOBINOPR -} BinOpr; - - -/* true if operation is foldable (that is, it is arithmetic or bitwise) */ -#define foldbinop(op) ((op) <= OPR_SHR) - - -#define luaK_codeABC(fs,o,a,b,c) luaK_codeABCk(fs,o,a,b,c,0) - - -typedef enum UnOpr { OPR_MINUS, OPR_BNOT, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr; - - -/* get (pointer to) instruction of given 'expdesc' */ -#define getinstruction(fs,e) ((fs)->f->code[(e)->u.info]) - - -#define luaK_setmultret(fs,e) luaK_setreturns(fs, e, LUA_MULTRET) - -#define luaK_jumpto(fs,t) luaK_patchlist(fs, luaK_jump(fs), t) - -LUAI_FUNC int luaK_code (FuncState *fs, Instruction i); -LUAI_FUNC int luaK_codeABx (FuncState *fs, OpCode o, int A, int Bx); -LUAI_FUNC int luaK_codeABCk (FuncState *fs, OpCode o, int A, int B, int C, - int k); -LUAI_FUNC int luaK_codevABCk (FuncState *fs, OpCode o, int A, int B, int C, - int k); -LUAI_FUNC int luaK_exp2const (FuncState *fs, const expdesc *e, TValue *v); -LUAI_FUNC void luaK_fixline (FuncState *fs, int line); -LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n); -LUAI_FUNC void luaK_codecheckglobal (FuncState *fs, expdesc *var, int k, - int line); -LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n); -LUAI_FUNC void luaK_checkstack (FuncState *fs, int n); -LUAI_FUNC void luaK_int (FuncState *fs, int reg, lua_Integer n); -LUAI_FUNC void luaK_vapar2local (FuncState *fs, expdesc *var); -LUAI_FUNC void luaK_dischargevars (FuncState *fs, expdesc *e); -LUAI_FUNC int luaK_exp2anyreg (FuncState *fs, expdesc *e); -LUAI_FUNC void luaK_exp2anyregup (FuncState *fs, expdesc *e); -LUAI_FUNC void luaK_exp2nextreg (FuncState *fs, expdesc *e); -LUAI_FUNC void luaK_exp2val (FuncState *fs, expdesc *e); -LUAI_FUNC void luaK_self (FuncState *fs, expdesc *e, expdesc *key); -LUAI_FUNC void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k); -LUAI_FUNC void luaK_goiftrue (FuncState *fs, expdesc *e); -LUAI_FUNC void luaK_storevar (FuncState *fs, expdesc *var, expdesc *e); -LUAI_FUNC void luaK_setreturns (FuncState *fs, expdesc *e, int nresults); -LUAI_FUNC void luaK_setoneret (FuncState *fs, expdesc *e); -LUAI_FUNC int luaK_jump (FuncState *fs); -LUAI_FUNC void luaK_ret (FuncState *fs, int first, int nret); -LUAI_FUNC void luaK_patchlist (FuncState *fs, int list, int target); -LUAI_FUNC void luaK_patchtohere (FuncState *fs, int list); -LUAI_FUNC void luaK_concat (FuncState *fs, int *l1, int l2); -LUAI_FUNC int luaK_getlabel (FuncState *fs); -LUAI_FUNC void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v, int line); -LUAI_FUNC void luaK_infix (FuncState *fs, BinOpr op, expdesc *v); -LUAI_FUNC void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1, - expdesc *v2, int line); -LUAI_FUNC void luaK_settablesize (FuncState *fs, int pc, - int ra, int asize, int hsize); -LUAI_FUNC void luaK_setlist (FuncState *fs, int base, int nelems, int tostore); -LUAI_FUNC void luaK_finish (FuncState *fs); -LUAI_FUNC l_noret luaK_semerror (LexState *ls, const char *fmt, ...); - - -#endif diff --git a/lib/lua/lcorolib.c b/lib/lua/lcorolib.c deleted file mode 100644 index eb30bf4..0000000 --- a/lib/lua/lcorolib.c +++ /dev/null @@ -1,225 +0,0 @@ -/* -** $Id: lcorolib.c $ -** Coroutine Library -** See Copyright Notice in lua.h -*/ - -#define lcorolib_c -#define LUA_LIB - -#include "lprefix.h" - - -#include - -#include "lua.h" - -#include "lauxlib.h" -#include "lualib.h" -#include "llimits.h" - - -static lua_State *getco (lua_State *L) { - lua_State *co = lua_tothread(L, 1); - luaL_argexpected(L, co, 1, "thread"); - return co; -} - - -/* -** Resumes a coroutine. Returns the number of results for non-error -** cases or -1 for errors. -*/ -static int auxresume (lua_State *L, lua_State *co, int narg) { - int status, nres; - if (l_unlikely(!lua_checkstack(co, narg))) { - lua_pushliteral(L, "too many arguments to resume"); - return -1; /* error flag */ - } - lua_xmove(L, co, narg); - status = lua_resume(co, L, narg, &nres); - if (l_likely(status == LUA_OK || status == LUA_YIELD)) { - if (l_unlikely(!lua_checkstack(L, nres + 1))) { - lua_pop(co, nres); /* remove results anyway */ - lua_pushliteral(L, "too many results to resume"); - return -1; /* error flag */ - } - lua_xmove(co, L, nres); /* move yielded values */ - return nres; - } - else { - lua_xmove(co, L, 1); /* move error message */ - return -1; /* error flag */ - } -} - - -static int luaB_coresume (lua_State *L) { - lua_State *co = getco(L); - int r; - r = auxresume(L, co, lua_gettop(L) - 1); - if (l_unlikely(r < 0)) { - lua_pushboolean(L, 0); - lua_insert(L, -2); - return 2; /* return false + error message */ - } - else { - lua_pushboolean(L, 1); - lua_insert(L, -(r + 1)); - return r + 1; /* return true + 'resume' returns */ - } -} - - -static int luaB_auxwrap (lua_State *L) { - lua_State *co = lua_tothread(L, lua_upvalueindex(1)); - int r = auxresume(L, co, lua_gettop(L)); - if (l_unlikely(r < 0)) { /* error? */ - int stat = lua_status(co); - if (stat != LUA_OK && stat != LUA_YIELD) { /* error in the coroutine? */ - stat = lua_closethread(co, L); /* close its tbc variables */ - lua_assert(stat != LUA_OK); - lua_xmove(co, L, 1); /* move error message to the caller */ - } - if (stat != LUA_ERRMEM && /* not a memory error and ... */ - lua_type(L, -1) == LUA_TSTRING) { /* ... error object is a string? */ - luaL_where(L, 1); /* add extra info, if available */ - lua_insert(L, -2); - lua_concat(L, 2); - } - return lua_error(L); /* propagate error */ - } - return r; -} - - -static int luaB_cocreate (lua_State *L) { - lua_State *NL; - luaL_checktype(L, 1, LUA_TFUNCTION); - NL = lua_newthread(L); - lua_pushvalue(L, 1); /* move function to top */ - lua_xmove(L, NL, 1); /* move function from L to NL */ - return 1; -} - - -static int luaB_cowrap (lua_State *L) { - luaB_cocreate(L); - lua_pushcclosure(L, luaB_auxwrap, 1); - return 1; -} - - -static int luaB_yield (lua_State *L) { - return lua_yield(L, lua_gettop(L)); -} - - -#define COS_RUN 0 -#define COS_DEAD 1 -#define COS_YIELD 2 -#define COS_NORM 3 - - -static const char *const statname[] = - {"running", "dead", "suspended", "normal"}; - - -static int auxstatus (lua_State *L, lua_State *co) { - if (L == co) return COS_RUN; - else { - switch (lua_status(co)) { - case LUA_YIELD: - return COS_YIELD; - case LUA_OK: { - lua_Debug ar; - if (lua_getstack(co, 0, &ar)) /* does it have frames? */ - return COS_NORM; /* it is running */ - else if (lua_gettop(co) == 0) - return COS_DEAD; - else - return COS_YIELD; /* initial state */ - } - default: /* some error occurred */ - return COS_DEAD; - } - } -} - - -static int luaB_costatus (lua_State *L) { - lua_State *co = getco(L); - lua_pushstring(L, statname[auxstatus(L, co)]); - return 1; -} - - -static lua_State *getoptco (lua_State *L) { - return (lua_isnone(L, 1) ? L : getco(L)); -} - - -static int luaB_yieldable (lua_State *L) { - lua_State *co = getoptco(L); - lua_pushboolean(L, lua_isyieldable(co)); - return 1; -} - - -static int luaB_corunning (lua_State *L) { - int ismain = lua_pushthread(L); - lua_pushboolean(L, ismain); - return 2; -} - - -static int luaB_close (lua_State *L) { - lua_State *co = getoptco(L); - int status = auxstatus(L, co); - switch (status) { - case COS_DEAD: case COS_YIELD: { - status = lua_closethread(co, L); - if (status == LUA_OK) { - lua_pushboolean(L, 1); - return 1; - } - else { - lua_pushboolean(L, 0); - lua_xmove(co, L, 1); /* move error message */ - return 2; - } - } - case COS_NORM: - return luaL_error(L, "cannot close a %s coroutine", statname[status]); - case COS_RUN: - lua_geti(L, LUA_REGISTRYINDEX, LUA_RIDX_MAINTHREAD); /* get main */ - if (lua_tothread(L, -1) == co) - return luaL_error(L, "cannot close main thread"); - lua_closethread(co, L); /* close itself */ - /* previous call does not return *//* FALLTHROUGH */ - default: - lua_assert(0); - return 0; - } -} - - -static const luaL_Reg co_funcs[] = { - {"create", luaB_cocreate}, - {"resume", luaB_coresume}, - {"running", luaB_corunning}, - {"status", luaB_costatus}, - {"wrap", luaB_cowrap}, - {"yield", luaB_yield}, - {"isyieldable", luaB_yieldable}, - {"close", luaB_close}, - {NULL, NULL} -}; - - - -LUAMOD_API int luaopen_coroutine (lua_State *L) { - luaL_newlib(L, co_funcs); - return 1; -} - diff --git a/lib/lua/lctype.c b/lib/lua/lctype.c deleted file mode 100644 index b1a43e4..0000000 --- a/lib/lua/lctype.c +++ /dev/null @@ -1,64 +0,0 @@ -/* -** $Id: lctype.c $ -** 'ctype' functions for Lua -** See Copyright Notice in lua.h -*/ - -#define lctype_c -#define LUA_CORE - -#include "lprefix.h" - - -#include "lctype.h" - -#if !LUA_USE_CTYPE /* { */ - -#include - - -#if defined (LUA_UCID) /* accept UniCode IDentifiers? */ -/* consider all non-ASCII codepoints to be alphabetic */ -#define NONA 0x01 -#else -#define NONA 0x00 /* default */ -#endif - - -LUAI_DDEF const lu_byte luai_ctype_[UCHAR_MAX + 2] = { - 0x00, /* EOZ */ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0. */ - 0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1. */ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x0c, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, /* 2. */ - 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, - 0x16, 0x16, 0x16, 0x16, 0x16, 0x16, 0x16, 0x16, /* 3. */ - 0x16, 0x16, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, - 0x04, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x05, /* 4. */ - 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, - 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, /* 5. */ - 0x05, 0x05, 0x05, 0x04, 0x04, 0x04, 0x04, 0x05, - 0x04, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x05, /* 6. */ - 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, - 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, /* 7. */ - 0x05, 0x05, 0x05, 0x04, 0x04, 0x04, 0x04, 0x00, - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, /* 8. */ - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, /* 9. */ - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, /* a. */ - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, /* b. */ - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, - 0x00, 0x00, NONA, NONA, NONA, NONA, NONA, NONA, /* c. */ - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, /* d. */ - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, /* e. */ - NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, - NONA, NONA, NONA, NONA, NONA, 0x00, 0x00, 0x00, /* f. */ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 -}; - -#endif /* } */ diff --git a/lib/lua/lctype.h b/lib/lua/lctype.h deleted file mode 100644 index 864e190..0000000 --- a/lib/lua/lctype.h +++ /dev/null @@ -1,101 +0,0 @@ -/* -** $Id: lctype.h $ -** 'ctype' functions for Lua -** See Copyright Notice in lua.h -*/ - -#ifndef lctype_h -#define lctype_h - -#include "lua.h" - - -/* -** WARNING: the functions defined here do not necessarily correspond -** to the similar functions in the standard C ctype.h. They are -** optimized for the specific needs of Lua. -*/ - -#if !defined(LUA_USE_CTYPE) - -#if 'A' == 65 && '0' == 48 -/* ASCII case: can use its own tables; faster and fixed */ -#define LUA_USE_CTYPE 0 -#else -/* must use standard C ctype */ -#define LUA_USE_CTYPE 1 -#endif - -#endif - - -#if !LUA_USE_CTYPE /* { */ - -#include - -#include "llimits.h" - - -#define ALPHABIT 0 -#define DIGITBIT 1 -#define PRINTBIT 2 -#define SPACEBIT 3 -#define XDIGITBIT 4 - - -#define MASK(B) (1 << (B)) - - -/* -** add 1 to char to allow index -1 (EOZ) -*/ -#define testprop(c,p) (luai_ctype_[(c)+1] & (p)) - -/* -** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_' -*/ -#define lislalpha(c) testprop(c, MASK(ALPHABIT)) -#define lislalnum(c) testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT))) -#define lisdigit(c) testprop(c, MASK(DIGITBIT)) -#define lisspace(c) testprop(c, MASK(SPACEBIT)) -#define lisprint(c) testprop(c, MASK(PRINTBIT)) -#define lisxdigit(c) testprop(c, MASK(XDIGITBIT)) - - -/* -** In ASCII, this 'ltolower' is correct for alphabetic characters and -** for '.'. That is enough for Lua needs. ('check_exp' ensures that -** the character either is an upper-case letter or is unchanged by -** the transformation, which holds for lower-case letters and '.'.) -*/ -#define ltolower(c) \ - check_exp(('A' <= (c) && (c) <= 'Z') || (c) == ((c) | ('A' ^ 'a')), \ - (c) | ('A' ^ 'a')) - - -/* one entry for each character and for -1 (EOZ) */ -LUAI_DDEC(const lu_byte luai_ctype_[UCHAR_MAX + 2];) - - -#else /* }{ */ - -/* -** use standard C ctypes -*/ - -#include - - -#define lislalpha(c) (isalpha(c) || (c) == '_') -#define lislalnum(c) (isalnum(c) || (c) == '_') -#define lisdigit(c) (isdigit(c)) -#define lisspace(c) (isspace(c)) -#define lisprint(c) (isprint(c)) -#define lisxdigit(c) (isxdigit(c)) - -#define ltolower(c) (tolower(c)) - -#endif /* } */ - -#endif - diff --git a/lib/lua/ldblib.c b/lib/lua/ldblib.c deleted file mode 100644 index 051327c..0000000 --- a/lib/lua/ldblib.c +++ /dev/null @@ -1,477 +0,0 @@ -/* -** $Id: ldblib.c $ -** Interface from Lua to its debug API -** See Copyright Notice in lua.h -*/ - -#define ldblib_c -#define LUA_LIB - -#include "lprefix.h" - - -#include -#include -#include - -#include "lua.h" - -#include "lauxlib.h" -#include "lualib.h" -#include "llimits.h" - - -/* -** The hook table at registry[HOOKKEY] maps threads to their current -** hook function. -*/ -static const char *const HOOKKEY = "_HOOKKEY"; - - -/* -** If L1 != L, L1 can be in any state, and therefore there are no -** guarantees about its stack space; any push in L1 must be -** checked. -*/ -static void checkstack (lua_State *L, lua_State *L1, int n) { - if (l_unlikely(L != L1 && !lua_checkstack(L1, n))) - luaL_error(L, "stack overflow"); -} - - -static int db_getregistry (lua_State *L) { - lua_pushvalue(L, LUA_REGISTRYINDEX); - return 1; -} - - -static int db_getmetatable (lua_State *L) { - luaL_checkany(L, 1); - if (!lua_getmetatable(L, 1)) { - lua_pushnil(L); /* no metatable */ - } - return 1; -} - - -static int db_setmetatable (lua_State *L) { - int t = lua_type(L, 2); - luaL_argexpected(L, t == LUA_TNIL || t == LUA_TTABLE, 2, "nil or table"); - lua_settop(L, 2); - lua_setmetatable(L, 1); - return 1; /* return 1st argument */ -} - - -static int db_getuservalue (lua_State *L) { - int n = (int)luaL_optinteger(L, 2, 1); - if (lua_type(L, 1) != LUA_TUSERDATA) - luaL_pushfail(L); - else if (lua_getiuservalue(L, 1, n) != LUA_TNONE) { - lua_pushboolean(L, 1); - return 2; - } - return 1; -} - - -static int db_setuservalue (lua_State *L) { - int n = (int)luaL_optinteger(L, 3, 1); - luaL_checktype(L, 1, LUA_TUSERDATA); - luaL_checkany(L, 2); - lua_settop(L, 2); - if (!lua_setiuservalue(L, 1, n)) - luaL_pushfail(L); - return 1; -} - - -/* -** Auxiliary function used by several library functions: check for -** an optional thread as function's first argument and set 'arg' with -** 1 if this argument is present (so that functions can skip it to -** access their other arguments) -*/ -static lua_State *getthread (lua_State *L, int *arg) { - if (lua_isthread(L, 1)) { - *arg = 1; - return lua_tothread(L, 1); - } - else { - *arg = 0; - return L; /* function will operate over current thread */ - } -} - - -/* -** Variations of 'lua_settable', used by 'db_getinfo' to put results -** from 'lua_getinfo' into result table. Key is always a string; -** value can be a string, an int, or a boolean. -*/ -static void settabss (lua_State *L, const char *k, const char *v) { - lua_pushstring(L, v); - lua_setfield(L, -2, k); -} - -static void settabsi (lua_State *L, const char *k, int v) { - lua_pushinteger(L, v); - lua_setfield(L, -2, k); -} - -static void settabsb (lua_State *L, const char *k, int v) { - lua_pushboolean(L, v); - lua_setfield(L, -2, k); -} - - -/* -** In function 'db_getinfo', the call to 'lua_getinfo' may push -** results on the stack; later it creates the result table to put -** these objects. Function 'treatstackoption' puts the result from -** 'lua_getinfo' on top of the result table so that it can call -** 'lua_setfield'. -*/ -static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) { - if (L == L1) - lua_rotate(L, -2, 1); /* exchange object and table */ - else - lua_xmove(L1, L, 1); /* move object to the "main" stack */ - lua_setfield(L, -2, fname); /* put object into table */ -} - - -/* -** Calls 'lua_getinfo' and collects all results in a new table. -** L1 needs stack space for an optional input (function) plus -** two optional outputs (function and line table) from function -** 'lua_getinfo'. -*/ -static int db_getinfo (lua_State *L) { - lua_Debug ar; - int arg; - lua_State *L1 = getthread(L, &arg); - const char *options = luaL_optstring(L, arg+2, "flnSrtu"); - checkstack(L, L1, 3); - luaL_argcheck(L, options[0] != '>', arg + 2, "invalid option '>'"); - if (lua_isfunction(L, arg + 1)) { /* info about a function? */ - options = lua_pushfstring(L, ">%s", options); /* add '>' to 'options' */ - lua_pushvalue(L, arg + 1); /* move function to 'L1' stack */ - lua_xmove(L, L1, 1); - } - else { /* stack level */ - if (!lua_getstack(L1, (int)luaL_checkinteger(L, arg + 1), &ar)) { - luaL_pushfail(L); /* level out of range */ - return 1; - } - } - if (!lua_getinfo(L1, options, &ar)) - return luaL_argerror(L, arg+2, "invalid option"); - lua_newtable(L); /* table to collect results */ - if (strchr(options, 'S')) { - lua_pushlstring(L, ar.source, ar.srclen); - lua_setfield(L, -2, "source"); - settabss(L, "short_src", ar.short_src); - settabsi(L, "linedefined", ar.linedefined); - settabsi(L, "lastlinedefined", ar.lastlinedefined); - settabss(L, "what", ar.what); - } - if (strchr(options, 'l')) - settabsi(L, "currentline", ar.currentline); - if (strchr(options, 'u')) { - settabsi(L, "nups", ar.nups); - settabsi(L, "nparams", ar.nparams); - settabsb(L, "isvararg", ar.isvararg); - } - if (strchr(options, 'n')) { - settabss(L, "name", ar.name); - settabss(L, "namewhat", ar.namewhat); - } - if (strchr(options, 'r')) { - settabsi(L, "ftransfer", ar.ftransfer); - settabsi(L, "ntransfer", ar.ntransfer); - } - if (strchr(options, 't')) { - settabsb(L, "istailcall", ar.istailcall); - settabsi(L, "extraargs", ar.extraargs); - } - if (strchr(options, 'L')) - treatstackoption(L, L1, "activelines"); - if (strchr(options, 'f')) - treatstackoption(L, L1, "func"); - return 1; /* return table */ -} - - -static int db_getlocal (lua_State *L) { - int arg; - lua_State *L1 = getthread(L, &arg); - int nvar = (int)luaL_checkinteger(L, arg + 2); /* local-variable index */ - if (lua_isfunction(L, arg + 1)) { /* function argument? */ - lua_pushvalue(L, arg + 1); /* push function */ - lua_pushstring(L, lua_getlocal(L, NULL, nvar)); /* push local name */ - return 1; /* return only name (there is no value) */ - } - else { /* stack-level argument */ - lua_Debug ar; - const char *name; - int level = (int)luaL_checkinteger(L, arg + 1); - if (l_unlikely(!lua_getstack(L1, level, &ar))) /* out of range? */ - return luaL_argerror(L, arg+1, "level out of range"); - checkstack(L, L1, 1); - name = lua_getlocal(L1, &ar, nvar); - if (name) { - lua_xmove(L1, L, 1); /* move local value */ - lua_pushstring(L, name); /* push name */ - lua_rotate(L, -2, 1); /* re-order */ - return 2; - } - else { - luaL_pushfail(L); /* no name (nor value) */ - return 1; - } - } -} - - -static int db_setlocal (lua_State *L) { - int arg; - const char *name; - lua_State *L1 = getthread(L, &arg); - lua_Debug ar; - int level = (int)luaL_checkinteger(L, arg + 1); - int nvar = (int)luaL_checkinteger(L, arg + 2); - if (l_unlikely(!lua_getstack(L1, level, &ar))) /* out of range? */ - return luaL_argerror(L, arg+1, "level out of range"); - luaL_checkany(L, arg+3); - lua_settop(L, arg+3); - checkstack(L, L1, 1); - lua_xmove(L, L1, 1); - name = lua_setlocal(L1, &ar, nvar); - if (name == NULL) - lua_pop(L1, 1); /* pop value (if not popped by 'lua_setlocal') */ - lua_pushstring(L, name); - return 1; -} - - -/* -** get (if 'get' is true) or set an upvalue from a closure -*/ -static int auxupvalue (lua_State *L, int get) { - const char *name; - int n = (int)luaL_checkinteger(L, 2); /* upvalue index */ - luaL_checktype(L, 1, LUA_TFUNCTION); /* closure */ - name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n); - if (name == NULL) return 0; - lua_pushstring(L, name); - lua_insert(L, -(get+1)); /* no-op if get is false */ - return get + 1; -} - - -static int db_getupvalue (lua_State *L) { - return auxupvalue(L, 1); -} - - -static int db_setupvalue (lua_State *L) { - luaL_checkany(L, 3); - return auxupvalue(L, 0); -} - - -/* -** Check whether a given upvalue from a given closure exists and -** returns its index -*/ -static void *checkupval (lua_State *L, int argf, int argnup, int *pnup) { - void *id; - int nup = (int)luaL_checkinteger(L, argnup); /* upvalue index */ - luaL_checktype(L, argf, LUA_TFUNCTION); /* closure */ - id = lua_upvalueid(L, argf, nup); - if (pnup) { - luaL_argcheck(L, id != NULL, argnup, "invalid upvalue index"); - *pnup = nup; - } - return id; -} - - -static int db_upvalueid (lua_State *L) { - void *id = checkupval(L, 1, 2, NULL); - if (id != NULL) - lua_pushlightuserdata(L, id); - else - luaL_pushfail(L); - return 1; -} - - -static int db_upvaluejoin (lua_State *L) { - int n1, n2; - checkupval(L, 1, 2, &n1); - checkupval(L, 3, 4, &n2); - luaL_argcheck(L, !lua_iscfunction(L, 1), 1, "Lua function expected"); - luaL_argcheck(L, !lua_iscfunction(L, 3), 3, "Lua function expected"); - lua_upvaluejoin(L, 1, n1, 3, n2); - return 0; -} - - -/* -** Call hook function registered at hook table for the current -** thread (if there is one) -*/ -static void hookf (lua_State *L, lua_Debug *ar) { - static const char *const hooknames[] = - {"call", "return", "line", "count", "tail call"}; - lua_getfield(L, LUA_REGISTRYINDEX, HOOKKEY); - lua_pushthread(L); - if (lua_rawget(L, -2) == LUA_TFUNCTION) { /* is there a hook function? */ - lua_pushstring(L, hooknames[(int)ar->event]); /* push event name */ - if (ar->currentline >= 0) - lua_pushinteger(L, ar->currentline); /* push current line */ - else lua_pushnil(L); - lua_assert(lua_getinfo(L, "lS", ar)); - lua_call(L, 2, 0); /* call hook function */ - } -} - - -/* -** Convert a string mask (for 'sethook') into a bit mask -*/ -static int makemask (const char *smask, int count) { - int mask = 0; - if (strchr(smask, 'c')) mask |= LUA_MASKCALL; - if (strchr(smask, 'r')) mask |= LUA_MASKRET; - if (strchr(smask, 'l')) mask |= LUA_MASKLINE; - if (count > 0) mask |= LUA_MASKCOUNT; - return mask; -} - - -/* -** Convert a bit mask (for 'gethook') into a string mask -*/ -static char *unmakemask (int mask, char *smask) { - int i = 0; - if (mask & LUA_MASKCALL) smask[i++] = 'c'; - if (mask & LUA_MASKRET) smask[i++] = 'r'; - if (mask & LUA_MASKLINE) smask[i++] = 'l'; - smask[i] = '\0'; - return smask; -} - - -static int db_sethook (lua_State *L) { - int arg, mask, count; - lua_Hook func; - lua_State *L1 = getthread(L, &arg); - if (lua_isnoneornil(L, arg+1)) { /* no hook? */ - lua_settop(L, arg+1); - func = NULL; mask = 0; count = 0; /* turn off hooks */ - } - else { - const char *smask = luaL_checkstring(L, arg+2); - luaL_checktype(L, arg+1, LUA_TFUNCTION); - count = (int)luaL_optinteger(L, arg + 3, 0); - func = hookf; mask = makemask(smask, count); - } - if (!luaL_getsubtable(L, LUA_REGISTRYINDEX, HOOKKEY)) { - /* table just created; initialize it */ - lua_pushliteral(L, "k"); - lua_setfield(L, -2, "__mode"); /** hooktable.__mode = "k" */ - lua_pushvalue(L, -1); - lua_setmetatable(L, -2); /* metatable(hooktable) = hooktable */ - } - checkstack(L, L1, 1); - lua_pushthread(L1); lua_xmove(L1, L, 1); /* key (thread) */ - lua_pushvalue(L, arg + 1); /* value (hook function) */ - lua_rawset(L, -3); /* hooktable[L1] = new Lua hook */ - lua_sethook(L1, func, mask, count); - return 0; -} - - -static int db_gethook (lua_State *L) { - int arg; - lua_State *L1 = getthread(L, &arg); - char buff[5]; - int mask = lua_gethookmask(L1); - lua_Hook hook = lua_gethook(L1); - if (hook == NULL) { /* no hook? */ - luaL_pushfail(L); - return 1; - } - else if (hook != hookf) /* external hook? */ - lua_pushliteral(L, "external hook"); - else { /* hook table must exist */ - lua_getfield(L, LUA_REGISTRYINDEX, HOOKKEY); - checkstack(L, L1, 1); - lua_pushthread(L1); lua_xmove(L1, L, 1); - lua_rawget(L, -2); /* 1st result = hooktable[L1] */ - lua_remove(L, -2); /* remove hook table */ - } - lua_pushstring(L, unmakemask(mask, buff)); /* 2nd result = mask */ - lua_pushinteger(L, lua_gethookcount(L1)); /* 3rd result = count */ - return 3; -} - - -static int db_debug (lua_State *L) { - for (;;) { - char buffer[250]; - lua_writestringerror("%s", "lua_debug> "); - if (fgets(buffer, sizeof(buffer), stdin) == NULL || - strcmp(buffer, "cont\n") == 0) - return 0; - if (luaL_loadbufferx(L, buffer, strlen(buffer), "=(debug command)", "t") || - lua_pcall(L, 0, 0, 0)) - lua_writestringerror("%s\n", luaL_tolstring(L, -1, NULL)); - lua_settop(L, 0); /* remove eventual returns */ - } -} - - -static int db_traceback (lua_State *L) { - int arg; - lua_State *L1 = getthread(L, &arg); - const char *msg = lua_tostring(L, arg + 1); - if (msg == NULL && !lua_isnoneornil(L, arg + 1)) /* non-string 'msg'? */ - lua_pushvalue(L, arg + 1); /* return it untouched */ - else { - int level = (int)luaL_optinteger(L, arg + 2, (L == L1) ? 1 : 0); - luaL_traceback(L, L1, msg, level); - } - return 1; -} - - -static const luaL_Reg dblib[] = { - {"debug", db_debug}, - {"getuservalue", db_getuservalue}, - {"gethook", db_gethook}, - {"getinfo", db_getinfo}, - {"getlocal", db_getlocal}, - {"getregistry", db_getregistry}, - {"getmetatable", db_getmetatable}, - {"getupvalue", db_getupvalue}, - {"upvaluejoin", db_upvaluejoin}, - {"upvalueid", db_upvalueid}, - {"setuservalue", db_setuservalue}, - {"sethook", db_sethook}, - {"setlocal", db_setlocal}, - {"setmetatable", db_setmetatable}, - {"setupvalue", db_setupvalue}, - {"traceback", db_traceback}, - {NULL, NULL} -}; - - -LUAMOD_API int luaopen_debug (lua_State *L) { - luaL_newlib(L, dblib); - return 1; -} - diff --git a/lib/lua/ldebug.c b/lib/lua/ldebug.c deleted file mode 100644 index 5293ccb..0000000 --- a/lib/lua/ldebug.c +++ /dev/null @@ -1,979 +0,0 @@ -/* -** $Id: ldebug.c $ -** Debug Interface -** See Copyright Notice in lua.h -*/ - -#define ldebug_c -#define LUA_CORE - -#include "lprefix.h" - - -#include -#include -#include - -#include "lua.h" - -#include "lapi.h" -#include "lcode.h" -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" -#include "lvm.h" - - - -#define LuaClosure(f) ((f) != NULL && (f)->c.tt == LUA_VLCL) - -static const char strlocal[] = "local"; -static const char strupval[] = "upvalue"; - -static const char *funcnamefromcall (lua_State *L, CallInfo *ci, - const char **name); - - -static int currentpc (CallInfo *ci) { - lua_assert(isLua(ci)); - return pcRel(ci->u.l.savedpc, ci_func(ci)->p); -} - - -/* -** Get a "base line" to find the line corresponding to an instruction. -** Base lines are regularly placed at MAXIWTHABS intervals, so usually -** an integer division gets the right place. When the source file has -** large sequences of empty/comment lines, it may need extra entries, -** so the original estimate needs a correction. -** If the original estimate is -1, the initial 'if' ensures that the -** 'while' will run at least once. -** The assertion that the estimate is a lower bound for the correct base -** is valid as long as the debug info has been generated with the same -** value for MAXIWTHABS or smaller. (Previous releases use a little -** smaller value.) -*/ -static int getbaseline (const Proto *f, int pc, int *basepc) { - if (f->sizeabslineinfo == 0 || pc < f->abslineinfo[0].pc) { - *basepc = -1; /* start from the beginning */ - return f->linedefined; - } - else { - int i = pc / MAXIWTHABS - 1; /* get an estimate */ - /* estimate must be a lower bound of the correct base */ - lua_assert(i < 0 || - (i < f->sizeabslineinfo && f->abslineinfo[i].pc <= pc)); - while (i + 1 < f->sizeabslineinfo && pc >= f->abslineinfo[i + 1].pc) - i++; /* low estimate; adjust it */ - *basepc = f->abslineinfo[i].pc; - return f->abslineinfo[i].line; - } -} - - -/* -** Get the line corresponding to instruction 'pc' in function 'f'; -** first gets a base line and from there does the increments until -** the desired instruction. -*/ -int luaG_getfuncline (const Proto *f, int pc) { - if (f->lineinfo == NULL) /* no debug information? */ - return -1; - else { - int basepc; - int baseline = getbaseline(f, pc, &basepc); - while (basepc++ < pc) { /* walk until given instruction */ - lua_assert(f->lineinfo[basepc] != ABSLINEINFO); - baseline += f->lineinfo[basepc]; /* correct line */ - } - return baseline; - } -} - - -static int getcurrentline (CallInfo *ci) { - return luaG_getfuncline(ci_func(ci)->p, currentpc(ci)); -} - - -/* -** Set 'trap' for all active Lua frames. -** This function can be called during a signal, under "reasonable" -** assumptions. A new 'ci' is completely linked in the list before it -** becomes part of the "active" list, and we assume that pointers are -** atomic; see comment in next function. -** (A compiler doing interprocedural optimizations could, theoretically, -** reorder memory writes in such a way that the list could be -** temporarily broken while inserting a new element. We simply assume it -** has no good reasons to do that.) -*/ -static void settraps (CallInfo *ci) { - for (; ci != NULL; ci = ci->previous) - if (isLua(ci)) - ci->u.l.trap = 1; -} - - -/* -** This function can be called during a signal, under "reasonable" -** assumptions. -** Fields 'basehookcount' and 'hookcount' (set by 'resethookcount') -** are for debug only, and it is no problem if they get arbitrary -** values (causes at most one wrong hook call). 'hookmask' is an atomic -** value. We assume that pointers are atomic too (e.g., gcc ensures that -** for all platforms where it runs). Moreover, 'hook' is always checked -** before being called (see 'luaD_hook'). -*/ -LUA_API void lua_sethook (lua_State *L, lua_Hook func, int mask, int count) { - if (func == NULL || mask == 0) { /* turn off hooks? */ - mask = 0; - func = NULL; - } - L->hook = func; - L->basehookcount = count; - resethookcount(L); - L->hookmask = cast_byte(mask); - if (mask) - settraps(L->ci); /* to trace inside 'luaV_execute' */ -} - - -LUA_API lua_Hook lua_gethook (lua_State *L) { - return L->hook; -} - - -LUA_API int lua_gethookmask (lua_State *L) { - return L->hookmask; -} - - -LUA_API int lua_gethookcount (lua_State *L) { - return L->basehookcount; -} - - -LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) { - int status; - CallInfo *ci; - if (level < 0) return 0; /* invalid (negative) level */ - lua_lock(L); - for (ci = L->ci; level > 0 && ci != &L->base_ci; ci = ci->previous) - level--; - if (level == 0 && ci != &L->base_ci) { /* level found? */ - status = 1; - ar->i_ci = ci; - } - else status = 0; /* no such level */ - lua_unlock(L); - return status; -} - - -static const char *upvalname (const Proto *p, int uv) { - TString *s = check_exp(uv < p->sizeupvalues, p->upvalues[uv].name); - if (s == NULL) return "?"; - else return getstr(s); -} - - -static const char *findvararg (CallInfo *ci, int n, StkId *pos) { - if (clLvalue(s2v(ci->func.p))->p->flag & PF_VAHID) { - int nextra = ci->u.l.nextraargs; - if (n >= -nextra) { /* 'n' is negative */ - *pos = ci->func.p - nextra - (n + 1); - return "(vararg)"; /* generic name for any vararg */ - } - } - return NULL; /* no such vararg */ -} - - -const char *luaG_findlocal (lua_State *L, CallInfo *ci, int n, StkId *pos) { - StkId base = ci->func.p + 1; - const char *name = NULL; - if (isLua(ci)) { - if (n < 0) /* access to vararg values? */ - return findvararg(ci, n, pos); - else - name = luaF_getlocalname(ci_func(ci)->p, n, currentpc(ci)); - } - if (name == NULL) { /* no 'standard' name? */ - StkId limit = (ci == L->ci) ? L->top.p : ci->next->func.p; - if (limit - base >= n && n > 0) { /* is 'n' inside 'ci' stack? */ - /* generic name for any valid slot */ - name = isLua(ci) ? "(temporary)" : "(C temporary)"; - } - else - return NULL; /* no name */ - } - if (pos) - *pos = base + (n - 1); - return name; -} - - -LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) { - const char *name; - lua_lock(L); - if (ar == NULL) { /* information about non-active function? */ - if (!isLfunction(s2v(L->top.p - 1))) /* not a Lua function? */ - name = NULL; - else /* consider live variables at function start (parameters) */ - name = luaF_getlocalname(clLvalue(s2v(L->top.p - 1))->p, n, 0); - } - else { /* active function; get information through 'ar' */ - StkId pos = NULL; /* to avoid warnings */ - name = luaG_findlocal(L, ar->i_ci, n, &pos); - if (name) { - setobjs2s(L, L->top.p, pos); - api_incr_top(L); - } - } - lua_unlock(L); - return name; -} - - -LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) { - StkId pos = NULL; /* to avoid warnings */ - const char *name; - lua_lock(L); - name = luaG_findlocal(L, ar->i_ci, n, &pos); - if (name) { - api_checkpop(L, 1); - setobjs2s(L, pos, L->top.p - 1); - L->top.p--; /* pop value */ - } - lua_unlock(L); - return name; -} - - -static void funcinfo (lua_Debug *ar, Closure *cl) { - if (!LuaClosure(cl)) { - ar->source = "=[C]"; - ar->srclen = LL("=[C]"); - ar->linedefined = -1; - ar->lastlinedefined = -1; - ar->what = "C"; - } - else { - const Proto *p = cl->l.p; - if (p->source) { - ar->source = getlstr(p->source, ar->srclen); - } - else { - ar->source = "=?"; - ar->srclen = LL("=?"); - } - ar->linedefined = p->linedefined; - ar->lastlinedefined = p->lastlinedefined; - ar->what = (ar->linedefined == 0) ? "main" : "Lua"; - } - luaO_chunkid(ar->short_src, ar->source, ar->srclen); -} - - -static int nextline (const Proto *p, int currentline, int pc) { - if (p->lineinfo[pc] != ABSLINEINFO) - return currentline + p->lineinfo[pc]; - else - return luaG_getfuncline(p, pc); -} - - -static void collectvalidlines (lua_State *L, Closure *f) { - if (!LuaClosure(f)) { - setnilvalue2s(L->top.p); - api_incr_top(L); - } - else { - const Proto *p = f->l.p; - int currentline = p->linedefined; - Table *t = luaH_new(L); /* new table to store active lines */ - sethvalue2s(L, L->top.p, t); /* push it on stack */ - api_incr_top(L); - if (p->lineinfo != NULL) { /* proto with debug information? */ - int i; - TValue v; - setbtvalue(&v); /* boolean 'true' to be the value of all indices */ - if (!(isvararg(p))) /* regular function? */ - i = 0; /* consider all instructions */ - else { /* vararg function */ - lua_assert(GET_OPCODE(p->code[0]) == OP_VARARGPREP); - currentline = nextline(p, currentline, 0); - i = 1; /* skip first instruction (OP_VARARGPREP) */ - } - for (; i < p->sizelineinfo; i++) { /* for each instruction */ - currentline = nextline(p, currentline, i); /* get its line */ - luaH_setint(L, t, currentline, &v); /* table[line] = true */ - } - } - } -} - - -static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) { - /* calling function is a known function? */ - if (ci != NULL && !(ci->callstatus & CIST_TAIL)) - return funcnamefromcall(L, ci->previous, name); - else return NULL; /* no way to find a name */ -} - - -static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar, - Closure *f, CallInfo *ci) { - int status = 1; - for (; *what; what++) { - switch (*what) { - case 'S': { - funcinfo(ar, f); - break; - } - case 'l': { - ar->currentline = (ci && isLua(ci)) ? getcurrentline(ci) : -1; - break; - } - case 'u': { - ar->nups = (f == NULL) ? 0 : f->c.nupvalues; - if (!LuaClosure(f)) { - ar->isvararg = 1; - ar->nparams = 0; - } - else { - ar->isvararg = (isvararg(f->l.p)) ? 1 : 0; - ar->nparams = f->l.p->numparams; - } - break; - } - case 't': { - if (ci != NULL) { - ar->istailcall = !!(ci->callstatus & CIST_TAIL); - ar->extraargs = - cast_uchar((ci->callstatus & MAX_CCMT) >> CIST_CCMT); - } - else { - ar->istailcall = 0; - ar->extraargs = 0; - } - break; - } - case 'n': { - ar->namewhat = getfuncname(L, ci, &ar->name); - if (ar->namewhat == NULL) { - ar->namewhat = ""; /* not found */ - ar->name = NULL; - } - break; - } - case 'r': { - if (ci == NULL || !(ci->callstatus & CIST_HOOKED)) - ar->ftransfer = ar->ntransfer = 0; - else { - ar->ftransfer = L->transferinfo.ftransfer; - ar->ntransfer = L->transferinfo.ntransfer; - } - break; - } - case 'L': - case 'f': /* handled by lua_getinfo */ - break; - default: status = 0; /* invalid option */ - } - } - return status; -} - - -LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) { - int status; - Closure *cl; - CallInfo *ci; - TValue *func; - lua_lock(L); - if (*what == '>') { - ci = NULL; - func = s2v(L->top.p - 1); - api_check(L, ttisfunction(func), "function expected"); - what++; /* skip the '>' */ - L->top.p--; /* pop function */ - } - else { - ci = ar->i_ci; - func = s2v(ci->func.p); - lua_assert(ttisfunction(func)); - } - cl = ttisclosure(func) ? clvalue(func) : NULL; - status = auxgetinfo(L, what, ar, cl, ci); - if (strchr(what, 'f')) { - setobj2s(L, L->top.p, func); - api_incr_top(L); - } - if (strchr(what, 'L')) - collectvalidlines(L, cl); - lua_unlock(L); - return status; -} - - -/* -** {====================================================== -** Symbolic Execution -** ======================================================= -*/ - - -static int filterpc (int pc, int jmptarget) { - if (pc < jmptarget) /* is code conditional (inside a jump)? */ - return -1; /* cannot know who sets that register */ - else return pc; /* current position sets that register */ -} - - -/* -** Try to find last instruction before 'lastpc' that modified register 'reg'. -*/ -static int findsetreg (const Proto *p, int lastpc, int reg) { - int pc; - int setreg = -1; /* keep last instruction that changed 'reg' */ - int jmptarget = 0; /* any code before this address is conditional */ - if (testMMMode(GET_OPCODE(p->code[lastpc]))) - lastpc--; /* previous instruction was not actually executed */ - for (pc = 0; pc < lastpc; pc++) { - Instruction i = p->code[pc]; - OpCode op = GET_OPCODE(i); - int a = GETARG_A(i); - int change; /* true if current instruction changed 'reg' */ - switch (op) { - case OP_LOADNIL: { /* set registers from 'a' to 'a+b' */ - int b = GETARG_B(i); - change = (a <= reg && reg <= a + b); - break; - } - case OP_TFORCALL: { /* affect all regs above its base */ - change = (reg >= a + 2); - break; - } - case OP_CALL: - case OP_TAILCALL: { /* affect all registers above base */ - change = (reg >= a); - break; - } - case OP_JMP: { /* doesn't change registers, but changes 'jmptarget' */ - int b = GETARG_sJ(i); - int dest = pc + 1 + b; - /* jump does not skip 'lastpc' and is larger than current one? */ - if (dest <= lastpc && dest > jmptarget) - jmptarget = dest; /* update 'jmptarget' */ - change = 0; - break; - } - default: /* any instruction that sets A */ - change = (testAMode(op) && reg == a); - break; - } - if (change) - setreg = filterpc(pc, jmptarget); - } - return setreg; -} - - -/* -** Find a "name" for the constant 'c'. -*/ -static const char *kname (const Proto *p, int index, const char **name) { - TValue *kvalue = &p->k[index]; - if (ttisstring(kvalue)) { - *name = getstr(tsvalue(kvalue)); - return "constant"; - } - else { - *name = "?"; - return NULL; - } -} - - -static const char *basicgetobjname (const Proto *p, int *ppc, int reg, - const char **name) { - int pc = *ppc; - *name = luaF_getlocalname(p, reg + 1, pc); - if (*name) /* is a local? */ - return strlocal; - /* else try symbolic execution */ - *ppc = pc = findsetreg(p, pc, reg); - if (pc != -1) { /* could find instruction? */ - Instruction i = p->code[pc]; - OpCode op = GET_OPCODE(i); - switch (op) { - case OP_MOVE: { - int b = GETARG_B(i); /* move from 'b' to 'a' */ - if (b < GETARG_A(i)) - return basicgetobjname(p, ppc, b, name); /* get name for 'b' */ - break; - } - case OP_GETUPVAL: { - *name = upvalname(p, GETARG_B(i)); - return strupval; - } - case OP_LOADK: return kname(p, GETARG_Bx(i), name); - case OP_LOADKX: return kname(p, GETARG_Ax(p->code[pc + 1]), name); - default: break; - } - } - return NULL; /* could not find reasonable name */ -} - - -/* -** Find a "name" for the register 'c'. -*/ -static void rname (const Proto *p, int pc, int c, const char **name) { - const char *what = basicgetobjname(p, &pc, c, name); /* search for 'c' */ - if (!(what && *what == 'c')) /* did not find a constant name? */ - *name = "?"; -} - - -/* -** Check whether table being indexed by instruction 'i' is the -** environment '_ENV' -*/ -static const char *isEnv (const Proto *p, int pc, Instruction i, int isup) { - int t = GETARG_B(i); /* table index */ - const char *name; /* name of indexed variable */ - if (isup) /* is 't' an upvalue? */ - name = upvalname(p, t); - else { /* 't' is a register */ - const char *what = basicgetobjname(p, &pc, t, &name); - /* 'name' must be the name of a local variable (at the current - level or an upvalue) */ - if (what != strlocal && what != strupval) - name = NULL; /* cannot be the variable _ENV */ - } - return (name && strcmp(name, LUA_ENV) == 0) ? "global" : "field"; -} - - -/* -** Extend 'basicgetobjname' to handle table accesses -*/ -static const char *getobjname (const Proto *p, int lastpc, int reg, - const char **name) { - const char *kind = basicgetobjname(p, &lastpc, reg, name); - if (kind != NULL) - return kind; - else if (lastpc != -1) { /* could find instruction? */ - Instruction i = p->code[lastpc]; - OpCode op = GET_OPCODE(i); - switch (op) { - case OP_GETTABUP: { - int k = GETARG_C(i); /* key index */ - kname(p, k, name); - return isEnv(p, lastpc, i, 1); - } - case OP_GETTABLE: case OP_GETVARG: { - int k = GETARG_C(i); /* key index */ - rname(p, lastpc, k, name); - return isEnv(p, lastpc, i, 0); - } - case OP_GETI: { - *name = "integer index"; - return "field"; - } - case OP_GETFIELD: { - int k = GETARG_C(i); /* key index */ - kname(p, k, name); - return isEnv(p, lastpc, i, 0); - } - case OP_SELF: { - int k = GETARG_C(i); /* key index */ - kname(p, k, name); - return "method"; - } - default: break; /* go through to return NULL */ - } - } - return NULL; /* could not find reasonable name */ -} - - -/* -** Try to find a name for a function based on the code that called it. -** (Only works when function was called by a Lua function.) -** Returns what the name is (e.g., "for iterator", "method", -** "metamethod") and sets '*name' to point to the name. -*/ -static const char *funcnamefromcode (lua_State *L, const Proto *p, - int pc, const char **name) { - TMS tm = (TMS)0; /* (initial value avoids warnings) */ - Instruction i = p->code[pc]; /* calling instruction */ - switch (GET_OPCODE(i)) { - case OP_CALL: - case OP_TAILCALL: - return getobjname(p, pc, GETARG_A(i), name); /* get function name */ - case OP_TFORCALL: { /* for iterator */ - *name = "for iterator"; - return "for iterator"; - } - /* other instructions can do calls through metamethods */ - case OP_SELF: case OP_GETTABUP: case OP_GETTABLE: - case OP_GETI: case OP_GETFIELD: - tm = TM_INDEX; - break; - case OP_SETTABUP: case OP_SETTABLE: case OP_SETI: case OP_SETFIELD: - tm = TM_NEWINDEX; - break; - case OP_MMBIN: case OP_MMBINI: case OP_MMBINK: { - tm = cast(TMS, GETARG_C(i)); - break; - } - case OP_UNM: tm = TM_UNM; break; - case OP_BNOT: tm = TM_BNOT; break; - case OP_LEN: tm = TM_LEN; break; - case OP_CONCAT: tm = TM_CONCAT; break; - case OP_EQ: tm = TM_EQ; break; - /* no cases for OP_EQI and OP_EQK, as they don't call metamethods */ - case OP_LT: case OP_LTI: case OP_GTI: tm = TM_LT; break; - case OP_LE: case OP_LEI: case OP_GEI: tm = TM_LE; break; - case OP_CLOSE: case OP_RETURN: tm = TM_CLOSE; break; - default: - return NULL; /* cannot find a reasonable name */ - } - *name = getshrstr(G(L)->tmname[tm]) + 2; - return "metamethod"; -} - - -/* -** Try to find a name for a function based on how it was called. -*/ -static const char *funcnamefromcall (lua_State *L, CallInfo *ci, - const char **name) { - if (ci->callstatus & CIST_HOOKED) { /* was it called inside a hook? */ - *name = "?"; - return "hook"; - } - else if (ci->callstatus & CIST_FIN) { /* was it called as a finalizer? */ - *name = "__gc"; - return "metamethod"; /* report it as such */ - } - else if (isLua(ci)) - return funcnamefromcode(L, ci_func(ci)->p, currentpc(ci), name); - else - return NULL; -} - -/* }====================================================== */ - - - -/* -** Check whether pointer 'o' points to some value in the stack frame of -** the current function and, if so, returns its index. Because 'o' may -** not point to a value in this stack, we cannot compare it with the -** region boundaries (undefined behavior in ISO C). -*/ -static int instack (CallInfo *ci, const TValue *o) { - int pos; - StkId base = ci->func.p + 1; - for (pos = 0; base + pos < ci->top.p; pos++) { - if (o == s2v(base + pos)) - return pos; - } - return -1; /* not found */ -} - - -/* -** Checks whether value 'o' came from an upvalue. (That can only happen -** with instructions OP_GETTABUP/OP_SETTABUP, which operate directly on -** upvalues.) -*/ -static const char *getupvalname (CallInfo *ci, const TValue *o, - const char **name) { - LClosure *c = ci_func(ci); - int i; - for (i = 0; i < c->nupvalues; i++) { - if (c->upvals[i]->v.p == o) { - *name = upvalname(c->p, i); - return strupval; - } - } - return NULL; -} - - -static const char *formatvarinfo (lua_State *L, const char *kind, - const char *name) { - if (kind == NULL) - return ""; /* no information */ - else - return luaO_pushfstring(L, " (%s '%s')", kind, name); -} - -/* -** Build a string with a "description" for the value 'o', such as -** "variable 'x'" or "upvalue 'y'". -*/ -static const char *varinfo (lua_State *L, const TValue *o) { - CallInfo *ci = L->ci; - const char *name = NULL; /* to avoid warnings */ - const char *kind = NULL; - if (isLua(ci)) { - kind = getupvalname(ci, o, &name); /* check whether 'o' is an upvalue */ - if (!kind) { /* not an upvalue? */ - int reg = instack(ci, o); /* try a register */ - if (reg >= 0) /* is 'o' a register? */ - kind = getobjname(ci_func(ci)->p, currentpc(ci), reg, &name); - } - } - return formatvarinfo(L, kind, name); -} - - -/* -** Raise a type error -*/ -static l_noret typeerror (lua_State *L, const TValue *o, const char *op, - const char *extra) { - const char *t = luaT_objtypename(L, o); - luaG_runerror(L, "attempt to %s a %s value%s", op, t, extra); -} - - -/* -** Raise a type error with "standard" information about the faulty -** object 'o' (using 'varinfo'). -*/ -l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) { - typeerror(L, o, op, varinfo(L, o)); -} - - -/* -** Raise an error for calling a non-callable object. Try to find a name -** for the object based on how it was called ('funcnamefromcall'); if it -** cannot get a name there, try 'varinfo'. -*/ -l_noret luaG_callerror (lua_State *L, const TValue *o) { - CallInfo *ci = L->ci; - const char *name = NULL; /* to avoid warnings */ - const char *kind = funcnamefromcall(L, ci, &name); - const char *extra = kind ? formatvarinfo(L, kind, name) : varinfo(L, o); - typeerror(L, o, "call", extra); -} - - -l_noret luaG_forerror (lua_State *L, const TValue *o, const char *what) { - luaG_runerror(L, "bad 'for' %s (number expected, got %s)", - what, luaT_objtypename(L, o)); -} - - -l_noret luaG_concaterror (lua_State *L, const TValue *p1, const TValue *p2) { - if (ttisstring(p1) || cvt2str(p1)) p1 = p2; - luaG_typeerror(L, p1, "concatenate"); -} - - -l_noret luaG_opinterror (lua_State *L, const TValue *p1, - const TValue *p2, const char *msg) { - if (!ttisnumber(p1)) /* first operand is wrong? */ - p2 = p1; /* now second is wrong */ - luaG_typeerror(L, p2, msg); -} - - -/* -** Error when both values are convertible to numbers, but not to integers -*/ -l_noret luaG_tointerror (lua_State *L, const TValue *p1, const TValue *p2) { - lua_Integer temp; - if (!luaV_tointegerns(p1, &temp, LUA_FLOORN2I)) - p2 = p1; - luaG_runerror(L, "number%s has no integer representation", varinfo(L, p2)); -} - - -l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) { - const char *t1 = luaT_objtypename(L, p1); - const char *t2 = luaT_objtypename(L, p2); - if (strcmp(t1, t2) == 0) - luaG_runerror(L, "attempt to compare two %s values", t1); - else - luaG_runerror(L, "attempt to compare %s with %s", t1, t2); -} - - -l_noret luaG_errnnil (lua_State *L, LClosure *cl, int k) { - const char *globalname = "?"; /* default name if k == 0 */ - if (k > 0) - kname(cl->p, k - 1, &globalname); - luaG_runerror(L, "global '%s' already defined", globalname); -} - - -/* add src:line information to 'msg' */ -const char *luaG_addinfo (lua_State *L, const char *msg, TString *src, - int line) { - if (src == NULL) /* no debug information? */ - return luaO_pushfstring(L, "?:?: %s", msg); - else { - char buff[LUA_IDSIZE]; - size_t idlen; - const char *id = getlstr(src, idlen); - luaO_chunkid(buff, id, idlen); - return luaO_pushfstring(L, "%s:%d: %s", buff, line, msg); - } -} - - -l_noret luaG_errormsg (lua_State *L) { - if (L->errfunc != 0) { /* is there an error handling function? */ - StkId errfunc = restorestack(L, L->errfunc); - lua_assert(ttisfunction(s2v(errfunc))); - setobjs2s(L, L->top.p, L->top.p - 1); /* move argument */ - setobjs2s(L, L->top.p - 1, errfunc); /* push function */ - L->top.p++; /* assume EXTRA_STACK */ - luaD_callnoyield(L, L->top.p - 2, 1); /* call it */ - } - if (ttisnil(s2v(L->top.p - 1))) { /* error object is nil? */ - /* change it to a proper message */ - setsvalue2s(L, L->top.p - 1, luaS_newliteral(L, "")); - } - luaD_throw(L, LUA_ERRRUN); -} - - -l_noret luaG_runerror (lua_State *L, const char *fmt, ...) { - CallInfo *ci = L->ci; - const char *msg; - va_list argp; - luaC_checkGC(L); /* error message uses memory */ - pushvfstring(L, argp, fmt, msg); - if (isLua(ci)) { /* Lua function? */ - /* add source:line information */ - luaG_addinfo(L, msg, ci_func(ci)->p->source, getcurrentline(ci)); - setobjs2s(L, L->top.p - 2, L->top.p - 1); /* remove 'msg' */ - L->top.p--; - } - luaG_errormsg(L); -} - - -/* -** Check whether new instruction 'newpc' is in a different line from -** previous instruction 'oldpc'. More often than not, 'newpc' is only -** one or a few instructions after 'oldpc' (it must be after, see -** caller), so try to avoid calling 'luaG_getfuncline'. If they are -** too far apart, there is a good chance of a ABSLINEINFO in the way, -** so it goes directly to 'luaG_getfuncline'. -*/ -static int changedline (const Proto *p, int oldpc, int newpc) { - if (p->lineinfo == NULL) /* no debug information? */ - return 0; - if (newpc - oldpc < MAXIWTHABS / 2) { /* not too far apart? */ - int delta = 0; /* line difference */ - int pc = oldpc; - for (;;) { - int lineinfo = p->lineinfo[++pc]; - if (lineinfo == ABSLINEINFO) - break; /* cannot compute delta; fall through */ - delta += lineinfo; - if (pc == newpc) - return (delta != 0); /* delta computed successfully */ - } - } - /* either instructions are too far apart or there is an absolute line - info in the way; compute line difference explicitly */ - return (luaG_getfuncline(p, oldpc) != luaG_getfuncline(p, newpc)); -} - - -/* -** Traces Lua calls. If code is running the first instruction of a function, -** and function is not vararg, and it is not coming from an yield, -** calls 'luaD_hookcall'. (Vararg functions will call 'luaD_hookcall' -** after adjusting its variable arguments; otherwise, they could call -** a line/count hook before the call hook. Functions coming from -** an yield already called 'luaD_hookcall' before yielding.) -*/ -int luaG_tracecall (lua_State *L) { - CallInfo *ci = L->ci; - Proto *p = ci_func(ci)->p; - ci->u.l.trap = 1; /* ensure hooks will be checked */ - if (ci->u.l.savedpc == p->code) { /* first instruction (not resuming)? */ - if (isvararg(p)) - return 0; /* hooks will start at VARARGPREP instruction */ - else if (!(ci->callstatus & CIST_HOOKYIELD)) /* not yielded? */ - luaD_hookcall(L, ci); /* check 'call' hook */ - } - return 1; /* keep 'trap' on */ -} - - -/* -** Traces the execution of a Lua function. Called before the execution -** of each opcode, when debug is on. 'L->oldpc' stores the last -** instruction traced, to detect line changes. When entering a new -** function, 'npci' will be zero and will test as a new line whatever -** the value of 'oldpc'. Some exceptional conditions may return to -** a function without setting 'oldpc'. In that case, 'oldpc' may be -** invalid; if so, use zero as a valid value. (A wrong but valid 'oldpc' -** at most causes an extra call to a line hook.) -** This function is not "Protected" when called, so it should correct -** 'L->top.p' before calling anything that can run the GC. -*/ -int luaG_traceexec (lua_State *L, const Instruction *pc) { - CallInfo *ci = L->ci; - lu_byte mask = cast_byte(L->hookmask); - const Proto *p = ci_func(ci)->p; - int counthook; - if (!(mask & (LUA_MASKLINE | LUA_MASKCOUNT))) { /* no hooks? */ - ci->u.l.trap = 0; /* don't need to stop again */ - return 0; /* turn off 'trap' */ - } - pc++; /* reference is always next instruction */ - ci->u.l.savedpc = pc; /* save 'pc' */ - counthook = (mask & LUA_MASKCOUNT) && (--L->hookcount == 0); - if (counthook) - resethookcount(L); /* reset count */ - else if (!(mask & LUA_MASKLINE)) - return 1; /* no line hook and count != 0; nothing to be done now */ - if (ci->callstatus & CIST_HOOKYIELD) { /* hook yielded last time? */ - ci->callstatus &= ~CIST_HOOKYIELD; /* erase mark */ - return 1; /* do not call hook again (VM yielded, so it did not move) */ - } - if (!luaP_isIT(*(ci->u.l.savedpc - 1))) /* top not being used? */ - L->top.p = ci->top.p; /* correct top */ - if (counthook) - luaD_hook(L, LUA_HOOKCOUNT, -1, 0, 0); /* call count hook */ - if (mask & LUA_MASKLINE) { - /* 'L->oldpc' may be invalid; use zero in this case */ - int oldpc = (L->oldpc < p->sizecode) ? L->oldpc : 0; - int npci = pcRel(pc, p); - if (npci <= oldpc || /* call hook when jump back (loop), */ - changedline(p, oldpc, npci)) { /* or when enter new line */ - int newline = luaG_getfuncline(p, npci); - luaD_hook(L, LUA_HOOKLINE, newline, 0, 0); /* call line hook */ - } - L->oldpc = npci; /* 'pc' of last call to line hook */ - } - if (L->status == LUA_YIELD) { /* did hook yield? */ - if (counthook) - L->hookcount = 1; /* undo decrement to zero */ - ci->callstatus |= CIST_HOOKYIELD; /* mark that it yielded */ - luaD_throw(L, LUA_YIELD); - } - return 1; /* keep 'trap' on */ -} - diff --git a/lib/lua/ldebug.h b/lib/lua/ldebug.h deleted file mode 100644 index 20d0781..0000000 --- a/lib/lua/ldebug.h +++ /dev/null @@ -1,65 +0,0 @@ -/* -** $Id: ldebug.h $ -** Auxiliary functions from Debug Interface module -** See Copyright Notice in lua.h -*/ - -#ifndef ldebug_h -#define ldebug_h - - -#include "lstate.h" - - -#define pcRel(pc, p) (cast_int((pc) - (p)->code) - 1) - - -/* Active Lua function (given call info) */ -#define ci_func(ci) (clLvalue(s2v((ci)->func.p))) - - -#define resethookcount(L) (L->hookcount = L->basehookcount) - -/* -** mark for entries in 'lineinfo' array that has absolute information in -** 'abslineinfo' array -*/ -#define ABSLINEINFO (-0x80) - - -/* -** MAXimum number of successive Instructions WiTHout ABSolute line -** information. (A power of two allows fast divisions.) -*/ -#if !defined(MAXIWTHABS) -#define MAXIWTHABS 128 -#endif - - -LUAI_FUNC int luaG_getfuncline (const Proto *f, int pc); -LUAI_FUNC const char *luaG_findlocal (lua_State *L, CallInfo *ci, int n, - StkId *pos); -LUAI_FUNC l_noret luaG_typeerror (lua_State *L, const TValue *o, - const char *opname); -LUAI_FUNC l_noret luaG_callerror (lua_State *L, const TValue *o); -LUAI_FUNC l_noret luaG_forerror (lua_State *L, const TValue *o, - const char *what); -LUAI_FUNC l_noret luaG_concaterror (lua_State *L, const TValue *p1, - const TValue *p2); -LUAI_FUNC l_noret luaG_opinterror (lua_State *L, const TValue *p1, - const TValue *p2, - const char *msg); -LUAI_FUNC l_noret luaG_tointerror (lua_State *L, const TValue *p1, - const TValue *p2); -LUAI_FUNC l_noret luaG_ordererror (lua_State *L, const TValue *p1, - const TValue *p2); -LUAI_FUNC l_noret luaG_errnnil (lua_State *L, LClosure *cl, int k); -LUAI_FUNC l_noret luaG_runerror (lua_State *L, const char *fmt, ...); -LUAI_FUNC const char *luaG_addinfo (lua_State *L, const char *msg, - TString *src, int line); -LUAI_FUNC l_noret luaG_errormsg (lua_State *L); -LUAI_FUNC int luaG_traceexec (lua_State *L, const Instruction *pc); -LUAI_FUNC int luaG_tracecall (lua_State *L); - - -#endif diff --git a/lib/lua/ldo.c b/lib/lua/ldo.c deleted file mode 100644 index fe8bf20..0000000 --- a/lib/lua/ldo.c +++ /dev/null @@ -1,1192 +0,0 @@ -/* -** $Id: ldo.c $ -** Stack and Call structure of Lua -** See Copyright Notice in lua.h -*/ - -#define ldo_c -#define LUA_CORE - -#include "lprefix.h" - - -#include -#include -#include - -#include "lua.h" - -#include "lapi.h" -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lgc.h" -#include "lmem.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lparser.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" -#include "lundump.h" -#include "lvm.h" -#include "lzio.h" - - - -#define errorstatus(s) ((s) > LUA_YIELD) - - -/* -** these macros allow user-specific actions when a thread is -** resumed/yielded. -*/ -#if !defined(luai_userstateresume) -#define luai_userstateresume(L,n) ((void)L) -#endif - -#if !defined(luai_userstateyield) -#define luai_userstateyield(L,n) ((void)L) -#endif - - -/* -** {====================================================== -** Error-recovery functions -** ======================================================= -*/ - -/* chained list of long jump buffers */ -typedef struct lua_longjmp { - struct lua_longjmp *previous; - jmp_buf b; - volatile TStatus status; /* error code */ -} lua_longjmp; - - -/* -** LUAI_THROW/LUAI_TRY define how Lua does exception handling. By -** default, Lua handles errors with exceptions when compiling as -** C++ code, with _longjmp/_setjmp when available (POSIX), and with -** longjmp/setjmp otherwise. -*/ -#if !defined(LUAI_THROW) /* { */ - -#if defined(__cplusplus) && !defined(LUA_USE_LONGJMP) /* { */ - -/* C++ exceptions */ -#define LUAI_THROW(L,c) throw(c) - -static void LUAI_TRY (lua_State *L, lua_longjmp *c, Pfunc f, void *ud) { - try { - f(L, ud); /* call function protected */ - } - catch (lua_longjmp *c1) { /* Lua error */ - if (c1 != c) /* not the correct level? */ - throw; /* rethrow to upper level */ - } - catch (...) { /* non-Lua exception */ - c->status = -1; /* create some error code */ - } -} - - -#elif defined(LUA_USE_POSIX) /* }{ */ - -/* in POSIX, use _longjmp/_setjmp (more efficient) */ -#define LUAI_THROW(L,c) _longjmp((c)->b, 1) -#define LUAI_TRY(L,c,f,ud) if (_setjmp((c)->b) == 0) ((f)(L, ud)) - -#else /* }{ */ - -/* ISO C handling with long jumps */ -#define LUAI_THROW(L,c) longjmp((c)->b, 1) -#define LUAI_TRY(L,c,f,ud) if (setjmp((c)->b) == 0) ((f)(L, ud)) - -#endif /* } */ - -#endif /* } */ - - -void luaD_seterrorobj (lua_State *L, TStatus errcode, StkId oldtop) { - if (errcode == LUA_ERRMEM) { /* memory error? */ - setsvalue2s(L, oldtop, G(L)->memerrmsg); /* reuse preregistered msg. */ - } - else { - lua_assert(errorstatus(errcode)); /* must be a real error */ - lua_assert(!ttisnil(s2v(L->top.p - 1))); /* with a non-nil object */ - setobjs2s(L, oldtop, L->top.p - 1); /* move it to 'oldtop' */ - } - L->top.p = oldtop + 1; /* top goes back to old top plus error object */ -} - - -l_noret luaD_throw (lua_State *L, TStatus errcode) { - if (L->errorJmp) { /* thread has an error handler? */ - L->errorJmp->status = errcode; /* set status */ - LUAI_THROW(L, L->errorJmp); /* jump to it */ - } - else { /* thread has no error handler */ - global_State *g = G(L); - lua_State *mainth = mainthread(g); - errcode = luaE_resetthread(L, errcode); /* close all upvalues */ - L->status = errcode; - if (mainth->errorJmp) { /* main thread has a handler? */ - setobjs2s(L, mainth->top.p++, L->top.p - 1); /* copy error obj. */ - luaD_throw(mainth, errcode); /* re-throw in main thread */ - } - else { /* no handler at all; abort */ - if (g->panic) { /* panic function? */ - lua_unlock(L); - g->panic(L); /* call panic function (last chance to jump out) */ - } - abort(); - } - } -} - - -l_noret luaD_throwbaselevel (lua_State *L, TStatus errcode) { - if (L->errorJmp) { - /* unroll error entries up to the first level */ - while (L->errorJmp->previous != NULL) - L->errorJmp = L->errorJmp->previous; - } - luaD_throw(L, errcode); -} - - -TStatus luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) { - l_uint32 oldnCcalls = L->nCcalls; - lua_longjmp lj; - lj.status = LUA_OK; - lj.previous = L->errorJmp; /* chain new error handler */ - L->errorJmp = &lj; - LUAI_TRY(L, &lj, f, ud); /* call 'f' catching errors */ - L->errorJmp = lj.previous; /* restore old error handler */ - L->nCcalls = oldnCcalls; - return lj.status; -} - -/* }====================================================== */ - - -/* -** {================================================================== -** Stack reallocation -** =================================================================== -*/ - -/* some stack space for error handling */ -#define STACKERRSPACE 200 - - -/* -** LUAI_MAXSTACK limits the size of the Lua stack. -** It must fit into INT_MAX/2. -*/ - -#if !defined(LUAI_MAXSTACK) -#if 1000000 < (INT_MAX / 2) -#define LUAI_MAXSTACK 1000000 -#else -#define LUAI_MAXSTACK (INT_MAX / 2u) -#endif -#endif - - -/* maximum stack size that respects size_t */ -#define MAXSTACK_BYSIZET ((MAX_SIZET / sizeof(StackValue)) - STACKERRSPACE) - -/* -** Minimum between LUAI_MAXSTACK and MAXSTACK_BYSIZET -** (Maximum size for the stack must respect size_t.) -*/ -#define MAXSTACK cast_int(LUAI_MAXSTACK < MAXSTACK_BYSIZET \ - ? LUAI_MAXSTACK : MAXSTACK_BYSIZET) - - -/* stack size with extra space for error handling */ -#define ERRORSTACKSIZE (MAXSTACK + STACKERRSPACE) - - -/* raise a stack error while running the message handler */ -l_noret luaD_errerr (lua_State *L) { - TString *msg = luaS_newliteral(L, "error in error handling"); - setsvalue2s(L, L->top.p, msg); - L->top.p++; /* assume EXTRA_STACK */ - luaD_throw(L, LUA_ERRERR); -} - - -/* -** Check whether stacks have enough space to run a simple function (such -** as a finalizer): At least BASIC_STACK_SIZE in the Lua stack, two -** available CallInfos, and two "slots" in the C stack. -*/ -int luaD_checkminstack (lua_State *L) { - if (getCcalls(L) >= LUAI_MAXCCALLS - 2) - return 0; /* not enough C-stack slots */ - if (L->ci->next == NULL && luaE_extendCI(L, 0) == NULL) - return 0; /* unable to allocate first ci */ - if (L->ci->next->next == NULL && luaE_extendCI(L, 0) == NULL) - return 0; /* unable to allocate second ci */ - if (L->stack_last.p - L->top.p >= BASIC_STACK_SIZE) - return 1; /* enough (BASIC_STACK_SIZE) free slots in the Lua stack */ - else /* try to grow stack to a size with enough free slots */ - return luaD_growstack(L, BASIC_STACK_SIZE, 0); -} - - -/* -** In ISO C, any pointer use after the pointer has been deallocated is -** undefined behavior. So, before a stack reallocation, all pointers -** should be changed to offsets, and after the reallocation they should -** be changed back to pointers. As during the reallocation the pointers -** are invalid, the reallocation cannot run emergency collections. -** Alternatively, we can use the old address after the deallocation. -** That is not strict ISO C, but seems to work fine everywhere. -** The following macro chooses how strict is the code. -*/ -#if !defined(LUAI_STRICT_ADDRESS) -#define LUAI_STRICT_ADDRESS 1 -#endif - -#if LUAI_STRICT_ADDRESS -/* -** Change all pointers to the stack into offsets. -*/ -static void relstack (lua_State *L) { - CallInfo *ci; - UpVal *up; - L->top.offset = savestack(L, L->top.p); - L->tbclist.offset = savestack(L, L->tbclist.p); - for (up = L->openupval; up != NULL; up = up->u.open.next) - up->v.offset = savestack(L, uplevel(up)); - for (ci = L->ci; ci != NULL; ci = ci->previous) { - ci->top.offset = savestack(L, ci->top.p); - ci->func.offset = savestack(L, ci->func.p); - } -} - - -/* -** Change back all offsets into pointers. -*/ -static void correctstack (lua_State *L, StkId oldstack) { - CallInfo *ci; - UpVal *up; - UNUSED(oldstack); - L->top.p = restorestack(L, L->top.offset); - L->tbclist.p = restorestack(L, L->tbclist.offset); - for (up = L->openupval; up != NULL; up = up->u.open.next) - up->v.p = s2v(restorestack(L, up->v.offset)); - for (ci = L->ci; ci != NULL; ci = ci->previous) { - ci->top.p = restorestack(L, ci->top.offset); - ci->func.p = restorestack(L, ci->func.offset); - if (isLua(ci)) - ci->u.l.trap = 1; /* signal to update 'trap' in 'luaV_execute' */ - } -} - -#else -/* -** Assume that it is fine to use an address after its deallocation, -** as long as we do not dereference it. -*/ - -static void relstack (lua_State *L) { UNUSED(L); } /* do nothing */ - - -/* -** Correct pointers into 'oldstack' to point into 'L->stack'. -*/ -static void correctstack (lua_State *L, StkId oldstack) { - CallInfo *ci; - UpVal *up; - StkId newstack = L->stack.p; - if (oldstack == newstack) - return; - L->top.p = L->top.p - oldstack + newstack; - L->tbclist.p = L->tbclist.p - oldstack + newstack; - for (up = L->openupval; up != NULL; up = up->u.open.next) - up->v.p = s2v(uplevel(up) - oldstack + newstack); - for (ci = L->ci; ci != NULL; ci = ci->previous) { - ci->top.p = ci->top.p - oldstack + newstack; - ci->func.p = ci->func.p - oldstack + newstack; - if (isLua(ci)) - ci->u.l.trap = 1; /* signal to update 'trap' in 'luaV_execute' */ - } -} -#endif - - -/* -** Reallocate the stack to a new size, correcting all pointers into it. -** In case of allocation error, raise an error or return false according -** to 'raiseerror'. -*/ -int luaD_reallocstack (lua_State *L, int newsize, int raiseerror) { - int oldsize = stacksize(L); - int i; - StkId newstack; - StkId oldstack = L->stack.p; - lu_byte oldgcstop = G(L)->gcstopem; - lua_assert(newsize <= MAXSTACK || newsize == ERRORSTACKSIZE); - relstack(L); /* change pointers to offsets */ - G(L)->gcstopem = 1; /* stop emergency collection */ - newstack = luaM_reallocvector(L, oldstack, oldsize + EXTRA_STACK, - newsize + EXTRA_STACK, StackValue); - G(L)->gcstopem = oldgcstop; /* restore emergency collection */ - if (l_unlikely(newstack == NULL)) { /* reallocation failed? */ - correctstack(L, oldstack); /* change offsets back to pointers */ - if (raiseerror) - luaM_error(L); - else return 0; /* do not raise an error */ - } - L->stack.p = newstack; - correctstack(L, oldstack); /* change offsets back to pointers */ - L->stack_last.p = L->stack.p + newsize; - for (i = oldsize + EXTRA_STACK; i < newsize + EXTRA_STACK; i++) - setnilvalue2s(newstack + i); /* erase new segment */ - return 1; -} - - -/* -** Try to grow the stack by at least 'n' elements. When 'raiseerror' -** is true, raises any error; otherwise, return 0 in case of errors. -*/ -int luaD_growstack (lua_State *L, int n, int raiseerror) { - int size = stacksize(L); - if (l_unlikely(size > MAXSTACK)) { - /* if stack is larger than maximum, thread is already using the - extra space reserved for errors, that is, thread is handling - a stack error; cannot grow further than that. */ - lua_assert(stacksize(L) == ERRORSTACKSIZE); - if (raiseerror) - luaD_errerr(L); /* stack error inside message handler */ - return 0; /* if not 'raiseerror', just signal it */ - } - else if (n < MAXSTACK) { /* avoids arithmetic overflows */ - int newsize = size + (size >> 1); /* tentative new size (size * 1.5) */ - int needed = cast_int(L->top.p - L->stack.p) + n; - if (newsize > MAXSTACK) /* cannot cross the limit */ - newsize = MAXSTACK; - if (newsize < needed) /* but must respect what was asked for */ - newsize = needed; - if (l_likely(newsize <= MAXSTACK)) - return luaD_reallocstack(L, newsize, raiseerror); - } - /* else stack overflow */ - /* add extra size to be able to handle the error message */ - luaD_reallocstack(L, ERRORSTACKSIZE, raiseerror); - if (raiseerror) - luaG_runerror(L, "stack overflow"); - return 0; -} - - -/* -** Compute how much of the stack is being used, by computing the -** maximum top of all call frames in the stack and the current top. -*/ -static int stackinuse (lua_State *L) { - CallInfo *ci; - int res; - StkId lim = L->top.p; - for (ci = L->ci; ci != NULL; ci = ci->previous) { - if (lim < ci->top.p) lim = ci->top.p; - } - lua_assert(lim <= L->stack_last.p + EXTRA_STACK); - res = cast_int(lim - L->stack.p) + 1; /* part of stack in use */ - if (res < LUA_MINSTACK) - res = LUA_MINSTACK; /* ensure a minimum size */ - return res; -} - - -/* -** If stack size is more than 3 times the current use, reduce that size -** to twice the current use. (So, the final stack size is at most 2/3 the -** previous size, and half of its entries are empty.) -** As a particular case, if stack was handling a stack overflow and now -** it is not, 'max' (limited by MAXSTACK) will be smaller than -** stacksize (equal to ERRORSTACKSIZE in this case), and so the stack -** will be reduced to a "regular" size. -*/ -void luaD_shrinkstack (lua_State *L) { - int inuse = stackinuse(L); - int max = (inuse > MAXSTACK / 3) ? MAXSTACK : inuse * 3; - /* if thread is currently not handling a stack overflow and its - size is larger than maximum "reasonable" size, shrink it */ - if (inuse <= MAXSTACK && stacksize(L) > max) { - int nsize = (inuse > MAXSTACK / 2) ? MAXSTACK : inuse * 2; - luaD_reallocstack(L, nsize, 0); /* ok if that fails */ - } - else /* don't change stack */ - condmovestack(L,(void)0,(void)0); /* (change only for debugging) */ - luaE_shrinkCI(L); /* shrink CI list */ -} - -/* }================================================================== */ - - -/* -** Call a hook for the given event. Make sure there is a hook to be -** called. (Both 'L->hook' and 'L->hookmask', which trigger this -** function, can be changed asynchronously by signals.) -*/ -void luaD_hook (lua_State *L, int event, int line, - int ftransfer, int ntransfer) { - lua_Hook hook = L->hook; - if (hook && L->allowhook) { /* make sure there is a hook */ - CallInfo *ci = L->ci; - ptrdiff_t top = savestack(L, L->top.p); /* preserve original 'top' */ - ptrdiff_t ci_top = savestack(L, ci->top.p); /* idem for 'ci->top' */ - lua_Debug ar; - ar.event = event; - ar.currentline = line; - ar.i_ci = ci; - L->transferinfo.ftransfer = ftransfer; - L->transferinfo.ntransfer = ntransfer; - if (isLua(ci) && L->top.p < ci->top.p) - L->top.p = ci->top.p; /* protect entire activation register */ - luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */ - if (ci->top.p < L->top.p + LUA_MINSTACK) - ci->top.p = L->top.p + LUA_MINSTACK; - L->allowhook = 0; /* cannot call hooks inside a hook */ - ci->callstatus |= CIST_HOOKED; - lua_unlock(L); - (*hook)(L, &ar); - lua_lock(L); - lua_assert(!L->allowhook); - L->allowhook = 1; - ci->top.p = restorestack(L, ci_top); - L->top.p = restorestack(L, top); - ci->callstatus &= ~CIST_HOOKED; - } -} - - -/* -** Executes a call hook for Lua functions. This function is called -** whenever 'hookmask' is not zero, so it checks whether call hooks are -** active. -*/ -void luaD_hookcall (lua_State *L, CallInfo *ci) { - L->oldpc = 0; /* set 'oldpc' for new function */ - if (L->hookmask & LUA_MASKCALL) { /* is call hook on? */ - int event = (ci->callstatus & CIST_TAIL) ? LUA_HOOKTAILCALL - : LUA_HOOKCALL; - Proto *p = ci_func(ci)->p; - ci->u.l.savedpc++; /* hooks assume 'pc' is already incremented */ - luaD_hook(L, event, -1, 1, p->numparams); - ci->u.l.savedpc--; /* correct 'pc' */ - } -} - - -/* -** Executes a return hook for Lua and C functions and sets/corrects -** 'oldpc'. (Note that this correction is needed by the line hook, so it -** is done even when return hooks are off.) -*/ -static void rethook (lua_State *L, CallInfo *ci, int nres) { - if (L->hookmask & LUA_MASKRET) { /* is return hook on? */ - StkId firstres = L->top.p - nres; /* index of first result */ - int delta = 0; /* correction for vararg functions */ - int ftransfer; - if (isLua(ci)) { - Proto *p = ci_func(ci)->p; - if (p->flag & PF_VAHID) - delta = ci->u.l.nextraargs + p->numparams + 1; - } - ci->func.p += delta; /* if vararg, back to virtual 'func' */ - ftransfer = cast_int(firstres - ci->func.p); - luaD_hook(L, LUA_HOOKRET, -1, ftransfer, nres); /* call it */ - ci->func.p -= delta; - } - if (isLua(ci = ci->previous)) - L->oldpc = pcRel(ci->u.l.savedpc, ci_func(ci)->p); /* set 'oldpc' */ -} - - -/* -** Check whether 'func' has a '__call' metafield. If so, put it in the -** stack, below original 'func', so that 'luaD_precall' can call it. -** Raise an error if there is no '__call' metafield. -** Bits CIST_CCMT in status count how many _call metamethods were -** invoked and how many corresponding extra arguments were pushed. -** (This count will be saved in the 'callstatus' of the call). -** Raise an error if this counter overflows. -*/ -static unsigned tryfuncTM (lua_State *L, StkId func, unsigned status) { - const TValue *tm; - StkId p; - tm = luaT_gettmbyobj(L, s2v(func), TM_CALL); - if (l_unlikely(ttisnil(tm))) /* no metamethod? */ - luaG_callerror(L, s2v(func)); - for (p = L->top.p; p > func; p--) /* open space for metamethod */ - setobjs2s(L, p, p-1); - L->top.p++; /* stack space pre-allocated by the caller */ - setobj2s(L, func, tm); /* metamethod is the new function to be called */ - if ((status & MAX_CCMT) == MAX_CCMT) /* is counter full? */ - luaG_runerror(L, "'__call' chain too long"); - return status + (1u << CIST_CCMT); /* increment counter */ -} - - -/* Generic case for 'moveresult' */ -l_sinline void genmoveresults (lua_State *L, StkId res, int nres, - int wanted) { - StkId firstresult = L->top.p - nres; /* index of first result */ - int i; - if (nres > wanted) /* extra results? */ - nres = wanted; /* don't need them */ - for (i = 0; i < nres; i++) /* move all results to correct place */ - setobjs2s(L, res + i, firstresult + i); - for (; i < wanted; i++) /* complete wanted number of results */ - setnilvalue2s(res + i); - L->top.p = res + wanted; /* top points after the last result */ -} - - -/* -** Given 'nres' results at 'firstResult', move 'fwanted-1' of them -** to 'res'. Handle most typical cases (zero results for commands, -** one result for expressions, multiple results for tail calls/single -** parameters) separated. The flag CIST_TBC in 'fwanted', if set, -** forces the switch to go to the default case. -*/ -l_sinline void moveresults (lua_State *L, StkId res, int nres, - l_uint32 fwanted) { - switch (fwanted) { /* handle typical cases separately */ - case 0 + 1: /* no values needed */ - L->top.p = res; - return; - case 1 + 1: /* one value needed */ - if (nres == 0) /* no results? */ - setnilvalue2s(res); /* adjust with nil */ - else /* at least one result */ - setobjs2s(L, res, L->top.p - nres); /* move it to proper place */ - L->top.p = res + 1; - return; - case LUA_MULTRET + 1: - genmoveresults(L, res, nres, nres); /* we want all results */ - break; - default: { /* two/more results and/or to-be-closed variables */ - int wanted = get_nresults(fwanted); - if (fwanted & CIST_TBC) { /* to-be-closed variables? */ - L->ci->u2.nres = nres; - L->ci->callstatus |= CIST_CLSRET; /* in case of yields */ - res = luaF_close(L, res, CLOSEKTOP, 1); - L->ci->callstatus &= ~CIST_CLSRET; - if (L->hookmask) { /* if needed, call hook after '__close's */ - ptrdiff_t savedres = savestack(L, res); - rethook(L, L->ci, nres); - res = restorestack(L, savedres); /* hook can move stack */ - } - if (wanted == LUA_MULTRET) - wanted = nres; /* we want all results */ - } - genmoveresults(L, res, nres, wanted); - break; - } - } -} - - -/* -** Finishes a function call: calls hook if necessary, moves current -** number of results to proper place, and returns to previous call -** info. If function has to close variables, hook must be called after -** that. -*/ -void luaD_poscall (lua_State *L, CallInfo *ci, int nres) { - l_uint32 fwanted = ci->callstatus & (CIST_TBC | CIST_NRESULTS); - if (l_unlikely(L->hookmask) && !(fwanted & CIST_TBC)) - rethook(L, ci, nres); - /* move results to proper place */ - moveresults(L, ci->func.p, nres, fwanted); - /* function cannot be in any of these cases when returning */ - lua_assert(!(ci->callstatus & - (CIST_HOOKED | CIST_YPCALL | CIST_FIN | CIST_CLSRET))); - L->ci = ci->previous; /* back to caller (after closing variables) */ -} - - - -#define next_ci(L) (L->ci->next ? L->ci->next : luaE_extendCI(L, 1)) - - -/* -** Allocate and initialize CallInfo structure. At this point, the -** only valid fields in the call status are number of results, -** CIST_C (if it's a C function), and number of extra arguments. -** (All these bit-fields fit in 16-bit values.) -*/ -l_sinline CallInfo *prepCallInfo (lua_State *L, StkId func, unsigned status, - StkId top) { - CallInfo *ci = L->ci = next_ci(L); /* new frame */ - ci->func.p = func; - lua_assert((status & ~(CIST_NRESULTS | CIST_C | MAX_CCMT)) == 0); - ci->callstatus = status; - ci->top.p = top; - return ci; -} - - -/* -** precall for C functions -*/ -l_sinline int precallC (lua_State *L, StkId func, unsigned status, - lua_CFunction f) { - int n; /* number of returns */ - CallInfo *ci; - checkstackp(L, LUA_MINSTACK, func); /* ensure minimum stack size */ - L->ci = ci = prepCallInfo(L, func, status | CIST_C, - L->top.p + LUA_MINSTACK); - lua_assert(ci->top.p <= L->stack_last.p); - if (l_unlikely(L->hookmask & LUA_MASKCALL)) { - int narg = cast_int(L->top.p - func) - 1; - luaD_hook(L, LUA_HOOKCALL, -1, 1, narg); - } - lua_unlock(L); - n = (*f)(L); /* do the actual call */ - lua_lock(L); - api_checknelems(L, n); - luaD_poscall(L, ci, n); - return n; -} - - -/* -** Prepare a function for a tail call, building its call info on top -** of the current call info. 'narg1' is the number of arguments plus 1 -** (so that it includes the function itself). Return the number of -** results, if it was a C function, or -1 for a Lua function. -*/ -int luaD_pretailcall (lua_State *L, CallInfo *ci, StkId func, - int narg1, int delta) { - unsigned status = LUA_MULTRET + 1; - retry: - switch (ttypetag(s2v(func))) { - case LUA_VCCL: /* C closure */ - return precallC(L, func, status, clCvalue(s2v(func))->f); - case LUA_VLCF: /* light C function */ - return precallC(L, func, status, fvalue(s2v(func))); - case LUA_VLCL: { /* Lua function */ - Proto *p = clLvalue(s2v(func))->p; - int fsize = p->maxstacksize; /* frame size */ - int nfixparams = p->numparams; - int i; - checkstackp(L, fsize - delta, func); - ci->func.p -= delta; /* restore 'func' (if vararg) */ - for (i = 0; i < narg1; i++) /* move down function and arguments */ - setobjs2s(L, ci->func.p + i, func + i); - func = ci->func.p; /* moved-down function */ - for (; narg1 <= nfixparams; narg1++) - setnilvalue2s(func + narg1); /* complete missing arguments */ - ci->top.p = func + 1 + fsize; /* top for new function */ - lua_assert(ci->top.p <= L->stack_last.p); - ci->u.l.savedpc = p->code; /* starting point */ - ci->callstatus |= CIST_TAIL; - L->top.p = func + narg1; /* set top */ - return -1; - } - default: { /* not a function */ - checkstackp(L, 1, func); /* space for metamethod */ - status = tryfuncTM(L, func, status); /* try '__call' metamethod */ - narg1++; - goto retry; /* try again */ - } - } -} - - -/* -** Prepares the call to a function (C or Lua). For C functions, also do -** the call. The function to be called is at '*func'. The arguments -** are on the stack, right after the function. Returns the CallInfo -** to be executed, if it was a Lua function. Otherwise (a C function) -** returns NULL, with all the results on the stack, starting at the -** original function position. -*/ -CallInfo *luaD_precall (lua_State *L, StkId func, int nresults) { - unsigned status = cast_uint(nresults + 1); - lua_assert(status <= MAXRESULTS + 1); - retry: - switch (ttypetag(s2v(func))) { - case LUA_VCCL: /* C closure */ - precallC(L, func, status, clCvalue(s2v(func))->f); - return NULL; - case LUA_VLCF: /* light C function */ - precallC(L, func, status, fvalue(s2v(func))); - return NULL; - case LUA_VLCL: { /* Lua function */ - CallInfo *ci; - Proto *p = clLvalue(s2v(func))->p; - int narg = cast_int(L->top.p - func) - 1; /* number of real arguments */ - int nfixparams = p->numparams; - int fsize = p->maxstacksize; /* frame size */ - checkstackp(L, fsize, func); - L->ci = ci = prepCallInfo(L, func, status, func + 1 + fsize); - ci->u.l.savedpc = p->code; /* starting point */ - for (; narg < nfixparams; narg++) - setnilvalue2s(L->top.p++); /* complete missing arguments */ - lua_assert(ci->top.p <= L->stack_last.p); - return ci; - } - default: { /* not a function */ - checkstackp(L, 1, func); /* space for metamethod */ - status = tryfuncTM(L, func, status); /* try '__call' metamethod */ - goto retry; /* try again with metamethod */ - } - } -} - - -/* -** Call a function (C or Lua) through C. 'inc' can be 1 (increment -** number of recursive invocations in the C stack) or nyci (the same -** plus increment number of non-yieldable calls). -** This function can be called with some use of EXTRA_STACK, so it should -** check the stack before doing anything else. 'luaD_precall' already -** does that. -*/ -l_sinline void ccall (lua_State *L, StkId func, int nResults, l_uint32 inc) { - CallInfo *ci; - L->nCcalls += inc; - if (l_unlikely(getCcalls(L) >= LUAI_MAXCCALLS)) { - checkstackp(L, 0, func); /* free any use of EXTRA_STACK */ - luaE_checkcstack(L); - } - if ((ci = luaD_precall(L, func, nResults)) != NULL) { /* Lua function? */ - ci->callstatus |= CIST_FRESH; /* mark that it is a "fresh" execute */ - luaV_execute(L, ci); /* call it */ - } - L->nCcalls -= inc; -} - - -/* -** External interface for 'ccall' -*/ -void luaD_call (lua_State *L, StkId func, int nResults) { - ccall(L, func, nResults, 1); -} - - -/* -** Similar to 'luaD_call', but does not allow yields during the call. -*/ -void luaD_callnoyield (lua_State *L, StkId func, int nResults) { - ccall(L, func, nResults, nyci); -} - - -/* -** Finish the job of 'lua_pcallk' after it was interrupted by an yield. -** (The caller, 'finishCcall', does the final call to 'adjustresults'.) -** The main job is to complete the 'luaD_pcall' called by 'lua_pcallk'. -** If a '__close' method yields here, eventually control will be back -** to 'finishCcall' (when that '__close' method finally returns) and -** 'finishpcallk' will run again and close any still pending '__close' -** methods. Similarly, if a '__close' method errs, 'precover' calls -** 'unroll' which calls ''finishCcall' and we are back here again, to -** close any pending '__close' methods. -** Note that, up to the call to 'luaF_close', the corresponding -** 'CallInfo' is not modified, so that this repeated run works like the -** first one (except that it has at least one less '__close' to do). In -** particular, field CIST_RECST preserves the error status across these -** multiple runs, changing only if there is a new error. -*/ -static TStatus finishpcallk (lua_State *L, CallInfo *ci) { - TStatus status = getcistrecst(ci); /* get original status */ - if (l_likely(status == LUA_OK)) /* no error? */ - status = LUA_YIELD; /* was interrupted by an yield */ - else { /* error */ - StkId func = restorestack(L, ci->u2.funcidx); - L->allowhook = getoah(ci); /* restore 'allowhook' */ - func = luaF_close(L, func, status, 1); /* can yield or raise an error */ - luaD_seterrorobj(L, status, func); - luaD_shrinkstack(L); /* restore stack size in case of overflow */ - setcistrecst(ci, LUA_OK); /* clear original status */ - } - ci->callstatus &= ~CIST_YPCALL; - L->errfunc = ci->u.c.old_errfunc; - /* if it is here, there were errors or yields; unlike 'lua_pcallk', - do not change status */ - return status; -} - - -/* -** Completes the execution of a C function interrupted by an yield. -** The interruption must have happened while the function was either -** closing its tbc variables in 'moveresults' or executing -** 'lua_callk'/'lua_pcallk'. In the first case, it just redoes -** 'luaD_poscall'. In the second case, the call to 'finishpcallk' -** finishes the interrupted execution of 'lua_pcallk'. After that, it -** calls the continuation of the interrupted function and finally it -** completes the job of the 'luaD_call' that called the function. In -** the call to 'adjustresults', we do not know the number of results -** of the function called by 'lua_callk'/'lua_pcallk', so we are -** conservative and use LUA_MULTRET (always adjust). -*/ -static void finishCcall (lua_State *L, CallInfo *ci) { - int n; /* actual number of results from C function */ - if (ci->callstatus & CIST_CLSRET) { /* was closing TBC variable? */ - lua_assert(ci->callstatus & CIST_TBC); - n = ci->u2.nres; /* just redo 'luaD_poscall' */ - /* don't need to reset CIST_CLSRET, as it will be set again anyway */ - } - else { - TStatus status = LUA_YIELD; /* default if there were no errors */ - lua_KFunction kf = ci->u.c.k; /* continuation function */ - /* must have a continuation and must be able to call it */ - lua_assert(kf != NULL && yieldable(L)); - if (ci->callstatus & CIST_YPCALL) /* was inside a 'lua_pcallk'? */ - status = finishpcallk(L, ci); /* finish it */ - adjustresults(L, LUA_MULTRET); /* finish 'lua_callk' */ - lua_unlock(L); - n = (*kf)(L, APIstatus(status), ci->u.c.ctx); /* call continuation */ - lua_lock(L); - api_checknelems(L, n); - } - luaD_poscall(L, ci, n); /* finish 'luaD_call' */ -} - - -/* -** Executes "full continuation" (everything in the stack) of a -** previously interrupted coroutine until the stack is empty (or another -** interruption long-jumps out of the loop). -*/ -static void unroll (lua_State *L, void *ud) { - CallInfo *ci; - UNUSED(ud); - while ((ci = L->ci) != &L->base_ci) { /* something in the stack */ - if (!isLua(ci)) /* C function? */ - finishCcall(L, ci); /* complete its execution */ - else { /* Lua function */ - luaV_finishOp(L); /* finish interrupted instruction */ - luaV_execute(L, ci); /* execute down to higher C 'boundary' */ - } - } -} - - -/* -** Try to find a suspended protected call (a "recover point") for the -** given thread. -*/ -static CallInfo *findpcall (lua_State *L) { - CallInfo *ci; - for (ci = L->ci; ci != NULL; ci = ci->previous) { /* search for a pcall */ - if (ci->callstatus & CIST_YPCALL) - return ci; - } - return NULL; /* no pending pcall */ -} - - -/* -** Signal an error in the call to 'lua_resume', not in the execution -** of the coroutine itself. (Such errors should not be handled by any -** coroutine error handler and should not kill the coroutine.) -*/ -static int resume_error (lua_State *L, const char *msg, int narg) { - api_checkpop(L, narg); - L->top.p -= narg; /* remove args from the stack */ - setsvalue2s(L, L->top.p, luaS_new(L, msg)); /* push error message */ - api_incr_top(L); - lua_unlock(L); - return LUA_ERRRUN; -} - - -/* -** Do the work for 'lua_resume' in protected mode. Most of the work -** depends on the status of the coroutine: initial state, suspended -** inside a hook, or regularly suspended (optionally with a continuation -** function), plus erroneous cases: non-suspended coroutine or dead -** coroutine. -*/ -static void resume (lua_State *L, void *ud) { - int n = *(cast(int*, ud)); /* number of arguments */ - StkId firstArg = L->top.p - n; /* first argument */ - CallInfo *ci = L->ci; - if (L->status == LUA_OK) /* starting a coroutine? */ - ccall(L, firstArg - 1, LUA_MULTRET, 0); /* just call its body */ - else { /* resuming from previous yield */ - lua_assert(L->status == LUA_YIELD); - L->status = LUA_OK; /* mark that it is running (again) */ - if (isLua(ci)) { /* yielded inside a hook? */ - /* undo increment made by 'luaG_traceexec': instruction was not - executed yet */ - lua_assert(ci->callstatus & CIST_HOOKYIELD); - ci->u.l.savedpc--; - L->top.p = firstArg; /* discard arguments */ - luaV_execute(L, ci); /* just continue running Lua code */ - } - else { /* 'common' yield */ - if (ci->u.c.k != NULL) { /* does it have a continuation function? */ - lua_unlock(L); - n = (*ci->u.c.k)(L, LUA_YIELD, ci->u.c.ctx); /* call continuation */ - lua_lock(L); - api_checknelems(L, n); - } - luaD_poscall(L, ci, n); /* finish 'luaD_call' */ - } - unroll(L, NULL); /* run continuation */ - } -} - - -/* -** Unrolls a coroutine in protected mode while there are recoverable -** errors, that is, errors inside a protected call. (Any error -** interrupts 'unroll', and this loop protects it again so it can -** continue.) Stops with a normal end (status == LUA_OK), an yield -** (status == LUA_YIELD), or an unprotected error ('findpcall' doesn't -** find a recover point). -*/ -static TStatus precover (lua_State *L, TStatus status) { - CallInfo *ci; - while (errorstatus(status) && (ci = findpcall(L)) != NULL) { - L->ci = ci; /* go down to recovery functions */ - setcistrecst(ci, status); /* status to finish 'pcall' */ - status = luaD_rawrunprotected(L, unroll, NULL); - } - return status; -} - - -LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs, - int *nresults) { - TStatus status; - lua_lock(L); - if (L->status == LUA_OK) { /* may be starting a coroutine */ - if (L->ci != &L->base_ci) /* not in base level? */ - return resume_error(L, "cannot resume non-suspended coroutine", nargs); - else if (L->top.p - (L->ci->func.p + 1) == nargs) /* no function? */ - return resume_error(L, "cannot resume dead coroutine", nargs); - } - else if (L->status != LUA_YIELD) /* ended with errors? */ - return resume_error(L, "cannot resume dead coroutine", nargs); - L->nCcalls = (from) ? getCcalls(from) : 0; - if (getCcalls(L) >= LUAI_MAXCCALLS) - return resume_error(L, "C stack overflow", nargs); - L->nCcalls++; - luai_userstateresume(L, nargs); - api_checkpop(L, (L->status == LUA_OK) ? nargs + 1 : nargs); - status = luaD_rawrunprotected(L, resume, &nargs); - /* continue running after recoverable errors */ - status = precover(L, status); - if (l_likely(!errorstatus(status))) - lua_assert(status == L->status); /* normal end or yield */ - else { /* unrecoverable error */ - L->status = status; /* mark thread as 'dead' */ - luaD_seterrorobj(L, status, L->top.p); /* push error message */ - L->ci->top.p = L->top.p; - } - *nresults = (status == LUA_YIELD) ? L->ci->u2.nyield - : cast_int(L->top.p - (L->ci->func.p + 1)); - lua_unlock(L); - return APIstatus(status); -} - - -LUA_API int lua_isyieldable (lua_State *L) { - return yieldable(L); -} - - -LUA_API int lua_yieldk (lua_State *L, int nresults, lua_KContext ctx, - lua_KFunction k) { - CallInfo *ci; - luai_userstateyield(L, nresults); - lua_lock(L); - ci = L->ci; - api_checkpop(L, nresults); - if (l_unlikely(!yieldable(L))) { - if (L != mainthread(G(L))) - luaG_runerror(L, "attempt to yield across a C-call boundary"); - else - luaG_runerror(L, "attempt to yield from outside a coroutine"); - } - L->status = LUA_YIELD; - ci->u2.nyield = nresults; /* save number of results */ - if (isLua(ci)) { /* inside a hook? */ - lua_assert(!isLuacode(ci)); - api_check(L, nresults == 0, "hooks cannot yield values"); - api_check(L, k == NULL, "hooks cannot continue after yielding"); - } - else { - if ((ci->u.c.k = k) != NULL) /* is there a continuation? */ - ci->u.c.ctx = ctx; /* save context */ - luaD_throw(L, LUA_YIELD); - } - lua_assert(ci->callstatus & CIST_HOOKED); /* must be inside a hook */ - lua_unlock(L); - return 0; /* return to 'luaD_hook' */ -} - - -/* -** Auxiliary structure to call 'luaF_close' in protected mode. -*/ -struct CloseP { - StkId level; - TStatus status; -}; - - -/* -** Auxiliary function to call 'luaF_close' in protected mode. -*/ -static void closepaux (lua_State *L, void *ud) { - struct CloseP *pcl = cast(struct CloseP *, ud); - luaF_close(L, pcl->level, pcl->status, 0); -} - - -/* -** Calls 'luaF_close' in protected mode. Return the original status -** or, in case of errors, the new status. -*/ -TStatus luaD_closeprotected (lua_State *L, ptrdiff_t level, TStatus status) { - CallInfo *old_ci = L->ci; - lu_byte old_allowhooks = L->allowhook; - for (;;) { /* keep closing upvalues until no more errors */ - struct CloseP pcl; - pcl.level = restorestack(L, level); pcl.status = status; - status = luaD_rawrunprotected(L, &closepaux, &pcl); - if (l_likely(status == LUA_OK)) /* no more errors? */ - return pcl.status; - else { /* an error occurred; restore saved state and repeat */ - L->ci = old_ci; - L->allowhook = old_allowhooks; - } - } -} - - -/* -** Call the C function 'func' in protected mode, restoring basic -** thread information ('allowhook', etc.) and in particular -** its stack level in case of errors. -*/ -TStatus luaD_pcall (lua_State *L, Pfunc func, void *u, ptrdiff_t old_top, - ptrdiff_t ef) { - TStatus status; - CallInfo *old_ci = L->ci; - lu_byte old_allowhooks = L->allowhook; - ptrdiff_t old_errfunc = L->errfunc; - L->errfunc = ef; - status = luaD_rawrunprotected(L, func, u); - if (l_unlikely(status != LUA_OK)) { /* an error occurred? */ - L->ci = old_ci; - L->allowhook = old_allowhooks; - status = luaD_closeprotected(L, old_top, status); - luaD_seterrorobj(L, status, restorestack(L, old_top)); - luaD_shrinkstack(L); /* restore stack size in case of overflow */ - } - L->errfunc = old_errfunc; - return status; -} - - - -/* -** Execute a protected parser. -*/ -struct SParser { /* data to 'f_parser' */ - ZIO *z; - Mbuffer buff; /* dynamic structure used by the scanner */ - Dyndata dyd; /* dynamic structures used by the parser */ - const char *mode; - const char *name; -}; - - -static void checkmode (lua_State *L, const char *mode, const char *x) { - if (strchr(mode, x[0]) == NULL) { - luaO_pushfstring(L, - "attempt to load a %s chunk (mode is '%s')", x, mode); - luaD_throw(L, LUA_ERRSYNTAX); - } -} - - -/* -** Before the first call to the reader function, Lua reserves a slot -** with a table for anchoring stuff. -*/ -static void f_parser (lua_State *L, void *ud) { - LClosure *cl; - struct SParser *p = cast(struct SParser *, ud); - const char *mode = p->mode ? p->mode : "bt"; - int c; - Table *anchor; - ptrdiff_t otop = savestack(L, L->top.p); /* original top */ - luaD_checkstack(L, 2); - anchor = luaH_new(L); /* create the anchor table */ - sethvalue2s(L, L->top.p++, anchor); /* anchor the anchor table */ - c = zgetc(p->z); /* read first character */ - if (c == LUA_SIGNATURE[0]) { - int fixed = 0; - if (strchr(mode, 'B') != NULL) - fixed = 1; - else - checkmode(L, mode, "binary"); - cl = luaU_undump(L, p->z, anchor, p->name, fixed); - } - else { - checkmode(L, mode, "text"); - cl = luaY_parser(L, p->z, anchor, &p->buff, &p->dyd, p->name, c); - } - L->top.p = restorestack(L, otop); /* restore stack */ - setclLvalue2s(L, L->top.p++, cl); /* push closure */ - lua_assert(cl->nupvalues == cl->p->sizeupvalues); - luaF_initupvals(L, cl); -} - - -/* -** Anchor an object in a table in the stack. First, anchor the object -** temporarily in the stack, as luaH_set may call an emergency GC. -** Then, add it in the table with itself as its key. -*/ -void luaD_anchorobj (lua_State *L, Table *anchor, GCObject *obj) { - setgcovalue(L, s2v(L->top.p++), obj); /* temporary anchor in the stack */ - luaH_set(L, anchor, s2v(L->top.p - 1), s2v(L->top.p - 1)); - /* Because this is a new key, luaH_set will call the GC barrier, so - we don't need to call the barrier again here */ - L->top.p--; -} - - -TStatus luaD_protectedparser (lua_State *L, ZIO *z, const char *name, - const char *mode) { - struct SParser p; - TStatus status; - incnny(L); /* cannot yield during parsing */ - p.z = z; p.name = name; p.mode = mode; - p.dyd.actvar.arr = NULL; p.dyd.actvar.size = 0; - p.dyd.gt.arr = NULL; p.dyd.gt.size = 0; - p.dyd.label.arr = NULL; p.dyd.label.size = 0; - luaZ_initbuffer(L, &p.buff); - status = luaD_pcall(L, f_parser, &p, savestack(L, L->top.p), L->errfunc); - luaZ_freebuffer(L, &p.buff); - luaM_freearray(L, p.dyd.actvar.arr, cast_sizet(p.dyd.actvar.size)); - luaM_freearray(L, p.dyd.gt.arr, cast_sizet(p.dyd.gt.size)); - luaM_freearray(L, p.dyd.label.arr, cast_sizet(p.dyd.label.size)); - decnny(L); - return status; -} - - diff --git a/lib/lua/ldo.h b/lib/lua/ldo.h deleted file mode 100644 index 85a00e3..0000000 --- a/lib/lua/ldo.h +++ /dev/null @@ -1,99 +0,0 @@ -/* -** $Id: ldo.h $ -** Stack and Call structure of Lua -** See Copyright Notice in lua.h -*/ - -#ifndef ldo_h -#define ldo_h - - -#include "llimits.h" -#include "lobject.h" -#include "lstate.h" -#include "lzio.h" - - -/* -** Macro to check stack size and grow stack if needed. Parameters -** 'pre'/'pos' allow the macro to preserve a pointer into the -** stack across reallocations, doing the work only when needed. -** It also allows the running of one GC step when the stack is -** reallocated. -** 'condmovestack' is used in heavy tests to force a stack reallocation -** at every check. -*/ - -#if !defined(HARDSTACKTESTS) -#define condmovestack(L,pre,pos) ((void)0) -#else -/* realloc stack keeping its size */ -#define condmovestack(L,pre,pos) \ - { int sz_ = stacksize(L); pre; luaD_reallocstack((L), sz_, 0); pos; } -#endif - -#define luaD_checkstackaux(L,n,pre,pos) \ - if (l_unlikely(L->stack_last.p - L->top.p <= (n))) \ - { pre; luaD_growstack(L, n, 1); pos; } \ - else { condmovestack(L,pre,pos); } - -/* In general, 'pre'/'pos' are empty (nothing to save) */ -#define luaD_checkstack(L,n) luaD_checkstackaux(L,n,(void)0,(void)0) - - - -#define savestack(L,pt) (cast_charp(pt) - cast_charp(L->stack.p)) -#define restorestack(L,n) cast(StkId, cast_charp(L->stack.p) + (n)) - - -/* macro to check stack size, preserving 'p' */ -#define checkstackp(L,n,p) \ - luaD_checkstackaux(L, n, \ - ptrdiff_t t__ = savestack(L, p), /* save 'p' */ \ - p = restorestack(L, t__)) /* 'pos' part: restore 'p' */ - - -/* -** Maximum depth for nested C calls, syntactical nested non-terminals, -** and other features implemented through recursion in C. (Value must -** fit in a 16-bit unsigned integer. It must also be compatible with -** the size of the C stack.) -*/ -#if !defined(LUAI_MAXCCALLS) -#define LUAI_MAXCCALLS 200 -#endif - - -/* type of protected functions, to be ran by 'runprotected' */ -typedef void (*Pfunc) (lua_State *L, void *ud); - -LUAI_FUNC l_noret luaD_errerr (lua_State *L); -LUAI_FUNC void luaD_seterrorobj (lua_State *L, TStatus errcode, StkId oldtop); -LUAI_FUNC TStatus luaD_protectedparser (lua_State *L, ZIO *z, - const char *name, - const char *mode); -LUAI_FUNC void luaD_hook (lua_State *L, int event, int line, - int fTransfer, int nTransfer); -LUAI_FUNC void luaD_hookcall (lua_State *L, CallInfo *ci); -LUAI_FUNC int luaD_pretailcall (lua_State *L, CallInfo *ci, StkId func, - int narg1, int delta); -LUAI_FUNC CallInfo *luaD_precall (lua_State *L, StkId func, int nResults); -LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults); -LUAI_FUNC void luaD_callnoyield (lua_State *L, StkId func, int nResults); -LUAI_FUNC TStatus luaD_closeprotected (lua_State *L, ptrdiff_t level, - TStatus status); -LUAI_FUNC TStatus luaD_pcall (lua_State *L, Pfunc func, void *u, - ptrdiff_t oldtop, ptrdiff_t ef); -LUAI_FUNC void luaD_poscall (lua_State *L, CallInfo *ci, int nres); -LUAI_FUNC int luaD_reallocstack (lua_State *L, int newsize, int raiseerror); -LUAI_FUNC int luaD_growstack (lua_State *L, int n, int raiseerror); -LUAI_FUNC void luaD_shrinkstack (lua_State *L); -LUAI_FUNC int luaD_checkminstack (lua_State *L); -LUAI_FUNC void luaD_anchorobj (lua_State *L, Table *anchor, GCObject *obj); - -LUAI_FUNC l_noret luaD_throw (lua_State *L, TStatus errcode); -LUAI_FUNC l_noret luaD_throwbaselevel (lua_State *L, TStatus errcode); -LUAI_FUNC TStatus luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud); - -#endif - diff --git a/lib/lua/ldump.c b/lib/lua/ldump.c deleted file mode 100644 index 5795788..0000000 --- a/lib/lua/ldump.c +++ /dev/null @@ -1,307 +0,0 @@ -/* -** $Id: ldump.c $ -** save precompiled Lua chunks -** See Copyright Notice in lua.h -*/ - -#define ldump_c -#define LUA_CORE - -#include "lprefix.h" - - -#include -#include - -#include "lua.h" - -#include "lapi.h" -#include "lgc.h" -#include "lobject.h" -#include "lstate.h" -#include "ltable.h" -#include "lundump.h" - - -typedef struct { - lua_State *L; - lua_Writer writer; - void *data; - size_t offset; /* current position relative to beginning of dump */ - int strip; - int status; - Table *h; /* table to track saved strings */ - lua_Unsigned nstr; /* counter for counting saved strings */ -} DumpState; - - -/* -** All high-level dumps go through dumpVector; you can change it to -** change the endianness of the result -*/ -#define dumpVector(D,v,n) dumpBlock(D,v,(n)*sizeof((v)[0])) - -#define dumpLiteral(D, s) dumpBlock(D,s,sizeof(s) - sizeof(char)) - - -/* -** Dump the block of memory pointed by 'b' with given 'size'. -** 'b' should not be NULL, except for the last call signaling the end -** of the dump. -*/ -static void dumpBlock (DumpState *D, const void *b, size_t size) { - if (D->status == 0) { /* do not write anything after an error */ - lua_unlock(D->L); - D->status = (*D->writer)(D->L, b, size, D->data); - lua_lock(D->L); - D->offset += size; - } -} - - -/* -** Dump enough zeros to ensure that current position is a multiple of -** 'align'. -*/ -static void dumpAlign (DumpState *D, unsigned align) { - unsigned padding = align - cast_uint(D->offset % align); - if (padding < align) { /* padding == align means no padding */ - static lua_Integer paddingContent = 0; - lua_assert(align <= sizeof(lua_Integer)); - dumpBlock(D, &paddingContent, padding); - } - lua_assert(D->offset % align == 0); -} - - -#define dumpVar(D,x) dumpVector(D,&x,1) - - -static void dumpByte (DumpState *D, int y) { - lu_byte x = (lu_byte)y; - dumpVar(D, x); -} - - -/* -** size for 'dumpVarint' buffer: each byte can store up to 7 bits. -** (The "+6" rounds up the division.) -*/ -#define DIBS ((l_numbits(lua_Unsigned) + 6) / 7) - -/* -** Dumps an unsigned integer using the MSB Varint encoding -*/ -static void dumpVarint (DumpState *D, lua_Unsigned x) { - lu_byte buff[DIBS]; - unsigned n = 1; - buff[DIBS - 1] = x & 0x7f; /* fill least-significant byte */ - while ((x >>= 7) != 0) /* fill other bytes in reverse order */ - buff[DIBS - (++n)] = cast_byte((x & 0x7f) | 0x80); - dumpVector(D, buff + DIBS - n, n); -} - - -static void dumpSize (DumpState *D, size_t sz) { - dumpVarint(D, cast(lua_Unsigned, sz)); -} - - -static void dumpInt (DumpState *D, int x) { - lua_assert(x >= 0); - dumpVarint(D, cast_uint(x)); -} - - -static void dumpNumber (DumpState *D, lua_Number x) { - dumpVar(D, x); -} - - -/* -** Signed integers are coded to keep small values small. (Coding -1 as -** 0xfff...fff would use too many bytes to save a quite common value.) -** A non-negative x is coded as 2x; a negative x is coded as -2x - 1. -** (0 => 0; -1 => 1; 1 => 2; -2 => 3; 2 => 4; ...) -*/ -static void dumpInteger (DumpState *D, lua_Integer x) { - lua_Unsigned cx = (x >= 0) ? 2u * l_castS2U(x) - : (2u * ~l_castS2U(x)) + 1; - dumpVarint(D, cx); -} - - -/* -** Dump a String. First dump its "size": -** size==0 is followed by an index and means "reuse saved string with -** that index"; index==0 means NULL. -** size>=1 is followed by the string contents with real size==size-1 and -** means that string, which will be saved with the next available index. -** The real size does not include the ending '\0' (which is not dumped), -** so adding 1 to it cannot overflow a size_t. -*/ -static void dumpString (DumpState *D, TString *ts) { - if (ts == NULL) { - dumpVarint(D, 0); /* will "reuse" NULL */ - dumpVarint(D, 0); /* special index for NULL */ - } - else { - TValue idx; - int tag = luaH_getstr(D->h, ts, &idx); - if (!tagisempty(tag)) { /* string already saved? */ - dumpVarint(D, 0); /* reuse a saved string */ - dumpVarint(D, l_castS2U(ivalue(&idx))); /* index of saved string */ - } - else { /* must write and save the string */ - TValue key, value; /* to save the string in the hash */ - size_t size; - const char *s = getlstr(ts, size); - dumpSize(D, size + 1); - dumpVector(D, s, size + 1); /* include ending '\0' */ - D->nstr++; /* one more saved string */ - setsvalue(D->L, &key, ts); /* the string is the key */ - setivalue(&value, l_castU2S(D->nstr)); /* its index is the value */ - luaH_set(D->L, D->h, &key, &value); /* h[ts] = nstr */ - /* integer value does not need barrier */ - } - } -} - - -static void dumpCode (DumpState *D, const Proto *f) { - dumpInt(D, f->sizecode); - dumpAlign(D, sizeof(f->code[0])); - lua_assert(f->code != NULL); - dumpVector(D, f->code, cast_uint(f->sizecode)); -} - - -static void dumpFunction (DumpState *D, const Proto *f); - -static void dumpConstants (DumpState *D, const Proto *f) { - int i; - int n = f->sizek; - dumpInt(D, n); - for (i = 0; i < n; i++) { - const TValue *o = &f->k[i]; - int tt = ttypetag(o); - dumpByte(D, tt); - switch (tt) { - case LUA_VNUMFLT: - dumpNumber(D, fltvalue(o)); - break; - case LUA_VNUMINT: - dumpInteger(D, ivalue(o)); - break; - case LUA_VSHRSTR: - case LUA_VLNGSTR: - dumpString(D, tsvalue(o)); - break; - default: - lua_assert(tt == LUA_VNIL || tt == LUA_VFALSE || tt == LUA_VTRUE); - } - } -} - - -static void dumpProtos (DumpState *D, const Proto *f) { - int i; - int n = f->sizep; - dumpInt(D, n); - for (i = 0; i < n; i++) - dumpFunction(D, f->p[i]); -} - - -static void dumpUpvalues (DumpState *D, const Proto *f) { - int i, n = f->sizeupvalues; - dumpInt(D, n); - for (i = 0; i < n; i++) { - dumpByte(D, f->upvalues[i].instack); - dumpByte(D, f->upvalues[i].idx); - dumpByte(D, f->upvalues[i].kind); - } -} - - -static void dumpDebug (DumpState *D, const Proto *f) { - int i, n; - n = (D->strip) ? 0 : f->sizelineinfo; - dumpInt(D, n); - if (f->lineinfo != NULL) - dumpVector(D, f->lineinfo, cast_uint(n)); - n = (D->strip) ? 0 : f->sizeabslineinfo; - dumpInt(D, n); - if (n > 0) { - /* 'abslineinfo' is an array of structures of int's */ - dumpAlign(D, sizeof(int)); - dumpVector(D, f->abslineinfo, cast_uint(n)); - } - n = (D->strip) ? 0 : f->sizelocvars; - dumpInt(D, n); - for (i = 0; i < n; i++) { - dumpString(D, f->locvars[i].varname); - dumpInt(D, f->locvars[i].startpc); - dumpInt(D, f->locvars[i].endpc); - } - n = (D->strip) ? 0 : f->sizeupvalues; - dumpInt(D, n); - for (i = 0; i < n; i++) - dumpString(D, f->upvalues[i].name); -} - - -static void dumpFunction (DumpState *D, const Proto *f) { - dumpInt(D, f->linedefined); - dumpInt(D, f->lastlinedefined); - dumpByte(D, f->numparams); - dumpByte(D, f->flag); - dumpByte(D, f->maxstacksize); - dumpCode(D, f); - dumpConstants(D, f); - dumpUpvalues(D, f); - dumpProtos(D, f); - dumpString(D, D->strip ? NULL : f->source); - dumpDebug(D, f); -} - - -#define dumpNumInfo(D, tvar, value) \ - { tvar i = value; dumpByte(D, sizeof(tvar)); dumpVar(D, i); } - - -static void dumpHeader (DumpState *D) { - dumpLiteral(D, LUA_SIGNATURE); - dumpByte(D, LUAC_VERSION); - dumpByte(D, LUAC_FORMAT); - dumpLiteral(D, LUAC_DATA); - dumpNumInfo(D, int, LUAC_INT); - dumpNumInfo(D, Instruction, LUAC_INST); - dumpNumInfo(D, lua_Integer, LUAC_INT); - dumpNumInfo(D, lua_Number, LUAC_NUM); -} - - -/* -** dump Lua function as precompiled chunk -*/ -int luaU_dump (lua_State *L, const Proto *f, lua_Writer w, void *data, - int strip) { - DumpState D; - D.h = luaH_new(L); /* aux. table to keep strings already dumped */ - sethvalue2s(L, L->top.p, D.h); /* anchor it */ - L->top.p++; - D.L = L; - D.writer = w; - D.offset = 0; - D.data = data; - D.strip = strip; - D.status = 0; - D.nstr = 0; - dumpHeader(&D); - dumpByte(&D, f->sizeupvalues); - dumpFunction(&D, f); - dumpBlock(&D, NULL, 0); /* signal end of dump */ - return D.status; -} - diff --git a/lib/lua/lfunc.c b/lib/lua/lfunc.c deleted file mode 100644 index b6fd9ce..0000000 --- a/lib/lua/lfunc.c +++ /dev/null @@ -1,314 +0,0 @@ -/* -** $Id: lfunc.c $ -** Auxiliary functions to manipulate prototypes and closures -** See Copyright Notice in lua.h -*/ - -#define lfunc_c -#define LUA_CORE - -#include "lprefix.h" - - -#include - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lgc.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" - - - -CClosure *luaF_newCclosure (lua_State *L, int nupvals) { - GCObject *o = luaC_newobj(L, LUA_VCCL, sizeCclosure(nupvals)); - CClosure *c = gco2ccl(o); - c->nupvalues = cast_byte(nupvals); - return c; -} - - -LClosure *luaF_newLclosure (lua_State *L, int nupvals) { - GCObject *o = luaC_newobj(L, LUA_VLCL, sizeLclosure(nupvals)); - LClosure *c = gco2lcl(o); - c->p = NULL; - c->nupvalues = cast_byte(nupvals); - while (nupvals--) c->upvals[nupvals] = NULL; - return c; -} - - -/* -** fill a closure with new closed upvalues -*/ -void luaF_initupvals (lua_State *L, LClosure *cl) { - int i; - for (i = 0; i < cl->nupvalues; i++) { - GCObject *o = luaC_newobj(L, LUA_VUPVAL, sizeof(UpVal)); - UpVal *uv = gco2upv(o); - uv->v.p = &uv->u.value; /* make it closed */ - setnilvalue(uv->v.p); - cl->upvals[i] = uv; - luaC_objbarrier(L, cl, uv); - } -} - - -/* -** Create a new upvalue at the given level, and link it to the list of -** open upvalues of 'L' after entry 'prev'. -**/ -static UpVal *newupval (lua_State *L, StkId level, UpVal **prev) { - GCObject *o = luaC_newobj(L, LUA_VUPVAL, sizeof(UpVal)); - UpVal *uv = gco2upv(o); - UpVal *next = *prev; - uv->v.p = s2v(level); /* current value lives in the stack */ - uv->u.open.next = next; /* link it to list of open upvalues */ - uv->u.open.previous = prev; - if (next) - next->u.open.previous = &uv->u.open.next; - *prev = uv; - if (!isintwups(L)) { /* thread not in list of threads with upvalues? */ - L->twups = G(L)->twups; /* link it to the list */ - G(L)->twups = L; - } - return uv; -} - - -/* -** Find and reuse, or create if it does not exist, an upvalue -** at the given level. -*/ -UpVal *luaF_findupval (lua_State *L, StkId level) { - UpVal **pp = &L->openupval; - UpVal *p; - lua_assert(isintwups(L) || L->openupval == NULL); - while ((p = *pp) != NULL && uplevel(p) >= level) { /* search for it */ - lua_assert(!isdead(G(L), p)); - if (uplevel(p) == level) /* corresponding upvalue? */ - return p; /* return it */ - pp = &p->u.open.next; - } - /* not found: create a new upvalue after 'pp' */ - return newupval(L, level, pp); -} - - -/* -** Call closing method for object 'obj' with error object 'err'. The -** boolean 'yy' controls whether the call is yieldable. -** (This function assumes EXTRA_STACK.) -*/ -static void callclosemethod (lua_State *L, TValue *obj, TValue *err, int yy) { - StkId top = L->top.p; - StkId func = top; - const TValue *tm = luaT_gettmbyobj(L, obj, TM_CLOSE); - setobj2s(L, top++, tm); /* will call metamethod... */ - setobj2s(L, top++, obj); /* with 'self' as the 1st argument */ - if (err != NULL) /* if there was an error... */ - setobj2s(L, top++, err); /* then error object will be 2nd argument */ - L->top.p = top; /* add function and arguments */ - if (yy) - luaD_call(L, func, 0); - else - luaD_callnoyield(L, func, 0); -} - - -/* -** Check whether object at given level has a close metamethod and raise -** an error if not. -*/ -static void checkclosemth (lua_State *L, StkId level) { - const TValue *tm = luaT_gettmbyobj(L, s2v(level), TM_CLOSE); - if (ttisnil(tm)) { /* no metamethod? */ - int idx = cast_int(level - L->ci->func.p); /* variable index */ - const char *vname = luaG_findlocal(L, L->ci, idx, NULL); - if (vname == NULL) vname = "?"; - luaG_runerror(L, "variable '%s' got a non-closable value", vname); - } -} - - -/* -** Prepare and call a closing method. -** If status is CLOSEKTOP, the call to the closing method will be pushed -** at the top of the stack. Otherwise, values can be pushed right after -** the 'level' of the upvalue being closed, as everything after that -** won't be used again. -*/ -static void prepcallclosemth (lua_State *L, StkId level, TStatus status, - int yy) { - TValue *uv = s2v(level); /* value being closed */ - TValue *errobj; - switch (status) { - case LUA_OK: - L->top.p = level + 1; /* call will be at this level */ - /* FALLTHROUGH */ - case CLOSEKTOP: /* don't need to change top */ - errobj = NULL; /* no error object */ - break; - default: /* 'luaD_seterrorobj' will set top to level + 2 */ - errobj = s2v(level + 1); /* error object goes after 'uv' */ - luaD_seterrorobj(L, status, level + 1); /* set error object */ - break; - } - callclosemethod(L, uv, errobj, yy); -} - - -/* Maximum value for deltas in 'tbclist' */ -#define MAXDELTA USHRT_MAX - - -/* -** Insert a variable in the list of to-be-closed variables. -*/ -void luaF_newtbcupval (lua_State *L, StkId level) { - lua_assert(level > L->tbclist.p); - if (l_isfalse(s2v(level))) - return; /* false doesn't need to be closed */ - checkclosemth(L, level); /* value must have a close method */ - while (cast_uint(level - L->tbclist.p) > MAXDELTA) { - L->tbclist.p += MAXDELTA; /* create a dummy node at maximum delta */ - L->tbclist.p->tbclist.delta = 0; - } - level->tbclist.delta = cast(unsigned short, level - L->tbclist.p); - L->tbclist.p = level; -} - - -void luaF_unlinkupval (UpVal *uv) { - lua_assert(upisopen(uv)); - *uv->u.open.previous = uv->u.open.next; - if (uv->u.open.next) - uv->u.open.next->u.open.previous = uv->u.open.previous; -} - - -/* -** Close all upvalues up to the given stack level. -*/ -void luaF_closeupval (lua_State *L, StkId level) { - UpVal *uv; - while ((uv = L->openupval) != NULL && uplevel(uv) >= level) { - TValue *slot = &uv->u.value; /* new position for value */ - lua_assert(uplevel(uv) < L->top.p); - luaF_unlinkupval(uv); /* remove upvalue from 'openupval' list */ - setobj(L, slot, uv->v.p); /* move value to upvalue slot */ - uv->v.p = slot; /* now current value lives here */ - if (!iswhite(uv)) { /* neither white nor dead? */ - nw2black(uv); /* closed upvalues cannot be gray */ - luaC_barrier(L, uv, slot); - } - } -} - - -/* -** Remove first element from the tbclist plus its dummy nodes. -*/ -static void poptbclist (lua_State *L) { - StkId tbc = L->tbclist.p; - lua_assert(tbc->tbclist.delta > 0); /* first element cannot be dummy */ - tbc -= tbc->tbclist.delta; - while (tbc > L->stack.p && tbc->tbclist.delta == 0) - tbc -= MAXDELTA; /* remove dummy nodes */ - L->tbclist.p = tbc; -} - - -/* -** Close all upvalues and to-be-closed variables up to the given stack -** level. Return restored 'level'. -*/ -StkId luaF_close (lua_State *L, StkId level, TStatus status, int yy) { - ptrdiff_t levelrel = savestack(L, level); - luaF_closeupval(L, level); /* first, close the upvalues */ - while (L->tbclist.p >= level) { /* traverse tbc's down to that level */ - StkId tbc = L->tbclist.p; /* get variable index */ - poptbclist(L); /* remove it from list */ - prepcallclosemth(L, tbc, status, yy); /* close variable */ - level = restorestack(L, levelrel); - } - return level; -} - - -Proto *luaF_newproto (lua_State *L) { - GCObject *o = luaC_newobj(L, LUA_VPROTO, sizeof(Proto)); - Proto *f = gco2p(o); - f->k = NULL; - f->sizek = 0; - f->p = NULL; - f->sizep = 0; - f->code = NULL; - f->sizecode = 0; - f->lineinfo = NULL; - f->sizelineinfo = 0; - f->abslineinfo = NULL; - f->sizeabslineinfo = 0; - f->upvalues = NULL; - f->sizeupvalues = 0; - f->numparams = 0; - f->flag = 0; - f->maxstacksize = 0; - f->locvars = NULL; - f->sizelocvars = 0; - f->linedefined = 0; - f->lastlinedefined = 0; - f->source = NULL; - return f; -} - - -lu_mem luaF_protosize (Proto *p) { - lu_mem sz = cast(lu_mem, sizeof(Proto)) - + cast_uint(p->sizep) * sizeof(Proto*) - + cast_uint(p->sizek) * sizeof(TValue) - + cast_uint(p->sizelocvars) * sizeof(LocVar) - + cast_uint(p->sizeupvalues) * sizeof(Upvaldesc); - if (!(p->flag & PF_FIXED)) { - sz += cast_uint(p->sizecode) * sizeof(Instruction); - sz += cast_uint(p->sizelineinfo) * sizeof(lu_byte); - sz += cast_uint(p->sizeabslineinfo) * sizeof(AbsLineInfo); - } - return sz; -} - - -void luaF_freeproto (lua_State *L, Proto *f) { - if (!(f->flag & PF_FIXED)) { - luaM_freearray(L, f->code, cast_sizet(f->sizecode)); - luaM_freearray(L, f->lineinfo, cast_sizet(f->sizelineinfo)); - luaM_freearray(L, f->abslineinfo, cast_sizet(f->sizeabslineinfo)); - } - luaM_freearray(L, f->p, cast_sizet(f->sizep)); - luaM_freearray(L, f->k, cast_sizet(f->sizek)); - luaM_freearray(L, f->locvars, cast_sizet(f->sizelocvars)); - luaM_freearray(L, f->upvalues, cast_sizet(f->sizeupvalues)); - luaM_free(L, f); -} - - -/* -** Look for n-th local variable at line 'line' in function 'func'. -** Returns NULL if not found. -*/ -const char *luaF_getlocalname (const Proto *f, int local_number, int pc) { - int i; - for (i = 0; isizelocvars && f->locvars[i].startpc <= pc; i++) { - if (pc < f->locvars[i].endpc) { /* is variable active? */ - local_number--; - if (local_number == 0) - return getstr(f->locvars[i].varname); - } - } - return NULL; /* not found */ -} - diff --git a/lib/lua/lfunc.h b/lib/lua/lfunc.h deleted file mode 100644 index d6aad3a..0000000 --- a/lib/lua/lfunc.h +++ /dev/null @@ -1,65 +0,0 @@ -/* -** $Id: lfunc.h $ -** Auxiliary functions to manipulate prototypes and closures -** See Copyright Notice in lua.h -*/ - -#ifndef lfunc_h -#define lfunc_h - - -#include "lobject.h" - - -#define sizeCclosure(n) \ - (offsetof(CClosure, upvalue) + sizeof(TValue) * cast_uint(n)) - -#define sizeLclosure(n) \ - (offsetof(LClosure, upvals) + sizeof(UpVal *) * cast_uint(n)) - - -/* test whether thread is in 'twups' list */ -#define isintwups(L) (L->twups != L) - - -/* -** maximum number of upvalues in a closure (both C and Lua). (Value -** must fit in a VM register.) -*/ -#define MAXUPVAL 255 - - -#define upisopen(up) ((up)->v.p != &(up)->u.value) - - -#define uplevel(up) check_exp(upisopen(up), cast(StkId, (up)->v.p)) - - -/* -** maximum number of misses before giving up the cache of closures -** in prototypes -*/ -#define MAXMISS 10 - - - -/* special status to close upvalues preserving the top of the stack */ -#define CLOSEKTOP (LUA_ERRERR + 1) - - -LUAI_FUNC Proto *luaF_newproto (lua_State *L); -LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nupvals); -LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nupvals); -LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl); -LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level); -LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level); -LUAI_FUNC void luaF_closeupval (lua_State *L, StkId level); -LUAI_FUNC StkId luaF_close (lua_State *L, StkId level, TStatus status, int yy); -LUAI_FUNC void luaF_unlinkupval (UpVal *uv); -LUAI_FUNC lu_mem luaF_protosize (Proto *p); -LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f); -LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number, - int pc); - - -#endif diff --git a/lib/lua/lgc.c b/lib/lua/lgc.c deleted file mode 100644 index a463e41..0000000 --- a/lib/lua/lgc.c +++ /dev/null @@ -1,1804 +0,0 @@ -/* -** $Id: lgc.c $ -** Garbage Collector -** See Copyright Notice in lua.h -*/ - -#define lgc_c -#define LUA_CORE - -#include "lprefix.h" - -#include - - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lgc.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" - - -/* -** Maximum number of elements to sweep in each single step. -** (Large enough to dissipate fixed overheads but small enough -** to allow small steps for the collector.) -*/ -#define GCSWEEPMAX 20 - - -/* -** Cost (in work units) of running one finalizer. -*/ -#define CWUFIN 10 - - -/* mask with all color bits */ -#define maskcolors (bitmask(BLACKBIT) | WHITEBITS) - -/* mask with all GC bits */ -#define maskgcbits (maskcolors | AGEBITS) - - -/* macro to erase all color bits then set only the current white bit */ -#define makewhite(g,x) \ - (x->marked = cast_byte((x->marked & ~maskcolors) | luaC_white(g))) - -/* make an object gray (neither white nor black) */ -#define set2gray(x) resetbits(x->marked, maskcolors) - - -/* make an object black (coming from any color) */ -#define set2black(x) \ - (x->marked = cast_byte((x->marked & ~WHITEBITS) | bitmask(BLACKBIT))) - - -#define valiswhite(x) (iscollectable(x) && iswhite(gcvalue(x))) - -#define keyiswhite(n) (keyiscollectable(n) && iswhite(gckey(n))) - - -/* -** Protected access to objects in values -*/ -#define gcvalueN(o) (iscollectable(o) ? gcvalue(o) : NULL) - - -/* -** Access to collectable objects in array part of tables -*/ -#define gcvalarr(t,i) \ - ((*getArrTag(t,i) & BIT_ISCOLLECTABLE) ? getArrVal(t,i)->gc : NULL) - - -#define markvalue(g,o) { checkliveness(mainthread(g),o); \ - if (valiswhite(o)) reallymarkobject(g,gcvalue(o)); } - -#define markkey(g, n) { if keyiswhite(n) reallymarkobject(g,gckey(n)); } - -#define markobject(g,t) { if (iswhite(t)) reallymarkobject(g, obj2gco(t)); } - -/* -** mark an object that can be NULL (either because it is really optional, -** or it was stripped as debug info, or inside an uncompleted structure) -*/ -#define markobjectN(g,t) { if (t) markobject(g,t); } - - -static void reallymarkobject (global_State *g, GCObject *o); -static void atomic (lua_State *L); -static void entersweep (lua_State *L); - - -/* -** {====================================================== -** Generic functions -** ======================================================= -*/ - - -/* -** one after last element in a hash array -*/ -#define gnodelast(h) gnode(h, cast_sizet(sizenode(h))) - - -static l_mem objsize (GCObject *o) { - lu_mem res; - switch (o->tt) { - case LUA_VTABLE: { - res = luaH_size(gco2t(o)); - break; - } - case LUA_VLCL: { - LClosure *cl = gco2lcl(o); - res = sizeLclosure(cl->nupvalues); - break; - } - case LUA_VCCL: { - CClosure *cl = gco2ccl(o); - res = sizeCclosure(cl->nupvalues); - break; - } - case LUA_VUSERDATA: { - Udata *u = gco2u(o); - res = sizeudata(u->nuvalue, u->len); - break; - } - case LUA_VPROTO: { - res = luaF_protosize(gco2p(o)); - break; - } - case LUA_VTHREAD: { - res = luaE_threadsize(gco2th(o)); - break; - } - case LUA_VSHRSTR: { - TString *ts = gco2ts(o); - res = sizestrshr(cast_uint(ts->shrlen)); - break; - } - case LUA_VLNGSTR: { - TString *ts = gco2ts(o); - res = luaS_sizelngstr(ts->u.lnglen, ts->shrlen); - break; - } - case LUA_VUPVAL: { - res = sizeof(UpVal); - break; - } - default: res = 0; lua_assert(0); - } - return cast(l_mem, res); -} - - -static GCObject **getgclist (GCObject *o) { - switch (o->tt) { - case LUA_VTABLE: return &gco2t(o)->gclist; - case LUA_VLCL: return &gco2lcl(o)->gclist; - case LUA_VCCL: return &gco2ccl(o)->gclist; - case LUA_VTHREAD: return &gco2th(o)->gclist; - case LUA_VPROTO: return &gco2p(o)->gclist; - case LUA_VUSERDATA: { - Udata *u = gco2u(o); - lua_assert(u->nuvalue > 0); - return &u->gclist; - } - default: lua_assert(0); return 0; - } -} - - -/* -** Link a collectable object 'o' with a known type into the list 'p'. -** (Must be a macro to access the 'gclist' field in different types.) -*/ -#define linkgclist(o,p) linkgclist_(obj2gco(o), &(o)->gclist, &(p)) - -static void linkgclist_ (GCObject *o, GCObject **pnext, GCObject **list) { - lua_assert(!isgray(o)); /* cannot be in a gray list */ - *pnext = *list; - *list = o; - set2gray(o); /* now it is */ -} - - -/* -** Link a generic collectable object 'o' into the list 'p'. -*/ -#define linkobjgclist(o,p) linkgclist_(obj2gco(o), getgclist(o), &(p)) - - - -/* -** Clear keys for empty entries in tables. If entry is empty, mark its -** entry as dead. This allows the collection of the key, but keeps its -** entry in the table: its removal could break a chain and could break -** a table traversal. Other places never manipulate dead keys, because -** its associated empty value is enough to signal that the entry is -** logically empty. -*/ -static void clearkey (Node *n) { - lua_assert(isempty(gval(n))); - if (keyiscollectable(n)) - setdeadkey(n); /* unused key; remove it */ -} - - -/* -** tells whether a key or value can be cleared from a weak -** table. Non-collectable objects are never removed from weak -** tables. Strings behave as 'values', so are never removed too. for -** other objects: if really collected, cannot keep them; for objects -** being finalized, keep them in keys, but not in values -*/ -static int iscleared (global_State *g, const GCObject *o) { - if (o == NULL) return 0; /* non-collectable value */ - else if (novariant(o->tt) == LUA_TSTRING) { - markobject(g, o); /* strings are 'values', so are never weak */ - return 0; - } - else return iswhite(o); -} - - -/* -** Barrier that moves collector forward, that is, marks the white object -** 'v' being pointed by the black object 'o'. In the generational -** mode, 'v' must also become old, if 'o' is old; however, it cannot -** be changed directly to OLD, because it may still point to non-old -** objects. So, it is marked as OLD0. In the next cycle it will become -** OLD1, and in the next it will finally become OLD (regular old). By -** then, any object it points to will also be old. If called in the -** incremental sweep phase, it clears the black object to white (sweep -** it) to avoid other barrier calls for this same object. (That cannot -** be done is generational mode, as its sweep does not distinguish -** white from dead.) -*/ -void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v) { - global_State *g = G(L); - lua_assert(isblack(o) && iswhite(v) && !isdead(g, v) && !isdead(g, o)); - if (keepinvariant(g)) { /* must keep invariant? */ - reallymarkobject(g, v); /* restore invariant */ - if (isold(o)) { - lua_assert(!isold(v)); /* white object could not be old */ - setage(v, G_OLD0); /* restore generational invariant */ - } - } - else { /* sweep phase */ - lua_assert(issweepphase(g)); - if (g->gckind != KGC_GENMINOR) /* incremental mode? */ - makewhite(g, o); /* mark 'o' as white to avoid other barriers */ - } -} - - -/* -** barrier that moves collector backward, that is, mark the black object -** pointing to a white object as gray again. -*/ -void luaC_barrierback_ (lua_State *L, GCObject *o) { - global_State *g = G(L); - lua_assert(isblack(o) && !isdead(g, o)); - lua_assert((g->gckind != KGC_GENMINOR) - || (isold(o) && getage(o) != G_TOUCHED1)); - if (getage(o) == G_TOUCHED2) /* already in gray list? */ - set2gray(o); /* make it gray to become touched1 */ - else /* link it in 'grayagain' and paint it gray */ - linkobjgclist(o, g->grayagain); - if (isold(o)) /* generational mode? */ - setage(o, G_TOUCHED1); /* touched in current cycle */ -} - - -void luaC_fix (lua_State *L, GCObject *o) { - global_State *g = G(L); - lua_assert(g->allgc == o); /* object must be 1st in 'allgc' list! */ - set2gray(o); /* they will be gray forever */ - setage(o, G_OLD); /* and old forever */ - g->allgc = o->next; /* remove object from 'allgc' list */ - o->next = g->fixedgc; /* link it to 'fixedgc' list */ - g->fixedgc = o; -} - - -/* -** create a new collectable object (with given type, size, and offset) -** and link it to 'allgc' list. -*/ -GCObject *luaC_newobjdt (lua_State *L, lu_byte tt, size_t sz, size_t offset) { - global_State *g = G(L); - char *p = cast_charp(luaM_newobject(L, novariant(tt), sz)); - GCObject *o = cast(GCObject *, p + offset); - o->marked = luaC_white(g); - o->tt = tt; - o->next = g->allgc; - g->allgc = o; - return o; -} - - -/* -** create a new collectable object with no offset. -*/ -GCObject *luaC_newobj (lua_State *L, lu_byte tt, size_t sz) { - return luaC_newobjdt(L, tt, sz, 0); -} - -/* }====================================================== */ - - - -/* -** {====================================================== -** Mark functions -** ======================================================= -*/ - - -/* -** Mark an object. Userdata with no user values, strings, and closed -** upvalues are visited and turned black here. Open upvalues are -** already indirectly linked through their respective threads in the -** 'twups' list, so they don't go to the gray list; nevertheless, they -** are kept gray to avoid barriers, as their values will be revisited -** by the thread or by 'remarkupvals'. Other objects are added to the -** gray list to be visited (and turned black) later. Both userdata and -** upvalues can call this function recursively, but this recursion goes -** for at most two levels: An upvalue cannot refer to another upvalue -** (only closures can), and a userdata's metatable must be a table. -*/ -static void reallymarkobject (global_State *g, GCObject *o) { - g->GCmarked += objsize(o); - switch (o->tt) { - case LUA_VSHRSTR: - case LUA_VLNGSTR: { - set2black(o); /* nothing to visit */ - break; - } - case LUA_VUPVAL: { - UpVal *uv = gco2upv(o); - if (upisopen(uv)) - set2gray(uv); /* open upvalues are kept gray */ - else - set2black(uv); /* closed upvalues are visited here */ - markvalue(g, uv->v.p); /* mark its content */ - break; - } - case LUA_VUSERDATA: { - Udata *u = gco2u(o); - if (u->nuvalue == 0) { /* no user values? */ - markobjectN(g, u->metatable); /* mark its metatable */ - set2black(u); /* nothing else to mark */ - break; - } - /* else... */ - } /* FALLTHROUGH */ - case LUA_VLCL: case LUA_VCCL: case LUA_VTABLE: - case LUA_VTHREAD: case LUA_VPROTO: { - linkobjgclist(o, g->gray); /* to be visited later */ - break; - } - default: lua_assert(0); break; - } -} - - -/* -** mark metamethods for basic types -*/ -static void markmt (global_State *g) { - int i; - for (i=0; i < LUA_NUMTYPES; i++) - markobjectN(g, g->mt[i]); -} - - -/* -** mark all objects in list of being-finalized -*/ -static void markbeingfnz (global_State *g) { - GCObject *o; - for (o = g->tobefnz; o != NULL; o = o->next) - markobject(g, o); -} - - -/* -** For each non-marked thread, simulates a barrier between each open -** upvalue and its value. (If the thread is collected, the value will be -** assigned to the upvalue, but then it can be too late for the barrier -** to act. The "barrier" does not need to check colors: A non-marked -** thread must be young; upvalues cannot be older than their threads; so -** any visited upvalue must be young too.) Also removes the thread from -** the list, as it was already visited. Removes also threads with no -** upvalues, as they have nothing to be checked. (If the thread gets an -** upvalue later, it will be linked in the list again.) -*/ -static void remarkupvals (global_State *g) { - lua_State *thread; - lua_State **p = &g->twups; - while ((thread = *p) != NULL) { - if (!iswhite(thread) && thread->openupval != NULL) - p = &thread->twups; /* keep marked thread with upvalues in the list */ - else { /* thread is not marked or without upvalues */ - UpVal *uv; - lua_assert(!isold(thread) || thread->openupval == NULL); - *p = thread->twups; /* remove thread from the list */ - thread->twups = thread; /* mark that it is out of list */ - for (uv = thread->openupval; uv != NULL; uv = uv->u.open.next) { - lua_assert(getage(uv) <= getage(thread)); - if (!iswhite(uv)) { /* upvalue already visited? */ - lua_assert(upisopen(uv) && isgray(uv)); - markvalue(g, uv->v.p); /* mark its value */ - } - } - } - } -} - - -static void cleargraylists (global_State *g) { - g->gray = g->grayagain = NULL; - g->weak = g->allweak = g->ephemeron = NULL; -} - - -/* -** mark root set and reset all gray lists, to start a new collection. -** 'GCmarked' is initialized to count the total number of live bytes -** during a cycle. -*/ -static void restartcollection (global_State *g) { - cleargraylists(g); - g->GCmarked = 0; - markobject(g, mainthread(g)); - markvalue(g, &g->l_registry); - markmt(g); - markbeingfnz(g); /* mark any finalizing object left from previous cycle */ -} - -/* }====================================================== */ - - -/* -** {====================================================== -** Traverse functions -** ======================================================= -*/ - - -/* -** Check whether object 'o' should be kept in the 'grayagain' list for -** post-processing by 'correctgraylist'. (It could put all old objects -** in the list and leave all the work to 'correctgraylist', but it is -** more efficient to avoid adding elements that will be removed.) Only -** TOUCHED1 objects need to be in the list. TOUCHED2 doesn't need to go -** back to a gray list, but then it must become OLD. (That is what -** 'correctgraylist' does when it finds a TOUCHED2 object.) -** This function is a no-op in incremental mode, as objects cannot be -** marked as touched in that mode. -*/ -static void genlink (global_State *g, GCObject *o) { - lua_assert(isblack(o)); - if (getage(o) == G_TOUCHED1) { /* touched in this cycle? */ - linkobjgclist(o, g->grayagain); /* link it back in 'grayagain' */ - } /* everything else do not need to be linked back */ - else if (getage(o) == G_TOUCHED2) - setage(o, G_OLD); /* advance age */ -} - - -/* -** Traverse a table with weak values and link it to proper list. During -** propagate phase, keep it in 'grayagain' list, to be revisited in the -** atomic phase. In the atomic phase, if table has any white value, -** put it in 'weak' list, to be cleared; otherwise, call 'genlink' -** to check table age in generational mode. -*/ -static void traverseweakvalue (global_State *g, Table *h) { - Node *n, *limit = gnodelast(h); - /* if there is array part, assume it may have white values (it is not - worth traversing it now just to check) */ - int hasclears = (h->asize > 0); - for (n = gnode(h, 0); n < limit; n++) { /* traverse hash part */ - if (isempty(gval(n))) /* entry is empty? */ - clearkey(n); /* clear its key */ - else { - lua_assert(!keyisnil(n)); - markkey(g, n); - if (!hasclears && iscleared(g, gcvalueN(gval(n)))) /* a white value? */ - hasclears = 1; /* table will have to be cleared */ - } - } - if (g->gcstate == GCSpropagate) - linkgclist(h, g->grayagain); /* must retraverse it in atomic phase */ - else if (hasclears) - linkgclist(h, g->weak); /* has to be cleared later */ - else - genlink(g, obj2gco(h)); -} - - -/* -** Traverse the array part of a table. -*/ -static int traversearray (global_State *g, Table *h) { - unsigned asize = h->asize; - int marked = 0; /* true if some object is marked in this traversal */ - unsigned i; - for (i = 0; i < asize; i++) { - GCObject *o = gcvalarr(h, i); - if (o != NULL && iswhite(o)) { - marked = 1; - reallymarkobject(g, o); - } - } - return marked; -} - - -/* -** Traverse an ephemeron table and link it to proper list. Returns true -** iff any object was marked during this traversal (which implies that -** convergence has to continue). During propagation phase, keep table -** in 'grayagain' list, to be visited again in the atomic phase. In -** the atomic phase, if table has any white->white entry, it has to -** be revisited during ephemeron convergence (as that key may turn -** black). Otherwise, if it has any white key, table has to be cleared -** (in the atomic phase). In generational mode, some tables -** must be kept in some gray list for post-processing; this is done -** by 'genlink'. -*/ -static int traverseephemeron (global_State *g, Table *h, int inv) { - int hasclears = 0; /* true if table has white keys */ - int hasww = 0; /* true if table has entry "white-key -> white-value" */ - unsigned int i; - unsigned int nsize = sizenode(h); - int marked = traversearray(g, h); /* traverse array part */ - /* traverse hash part; if 'inv', traverse descending - (see 'convergeephemerons') */ - for (i = 0; i < nsize; i++) { - Node *n = inv ? gnode(h, nsize - 1 - i) : gnode(h, i); - if (isempty(gval(n))) /* entry is empty? */ - clearkey(n); /* clear its key */ - else if (iscleared(g, gckeyN(n))) { /* key is not marked (yet)? */ - hasclears = 1; /* table must be cleared */ - if (valiswhite(gval(n))) /* value not marked yet? */ - hasww = 1; /* white-white entry */ - } - else if (valiswhite(gval(n))) { /* value not marked yet? */ - marked = 1; - reallymarkobject(g, gcvalue(gval(n))); /* mark it now */ - } - } - /* link table into proper list */ - if (g->gcstate == GCSpropagate) - linkgclist(h, g->grayagain); /* must retraverse it in atomic phase */ - else if (hasww) /* table has white->white entries? */ - linkgclist(h, g->ephemeron); /* have to propagate again */ - else if (hasclears) /* table has white keys? */ - linkgclist(h, g->allweak); /* may have to clean white keys */ - else - genlink(g, obj2gco(h)); /* check whether collector still needs to see it */ - return marked; -} - - -static void traversestrongtable (global_State *g, Table *h) { - Node *n, *limit = gnodelast(h); - traversearray(g, h); - for (n = gnode(h, 0); n < limit; n++) { /* traverse hash part */ - if (isempty(gval(n))) /* entry is empty? */ - clearkey(n); /* clear its key */ - else { - lua_assert(!keyisnil(n)); - markkey(g, n); - markvalue(g, gval(n)); - } - } - genlink(g, obj2gco(h)); -} - - -/* -** (result & 1) iff weak values; (result & 2) iff weak keys. -*/ -static int getmode (global_State *g, Table *h) { - const TValue *mode = gfasttm(g, h->metatable, TM_MODE); - if (mode == NULL || !ttisstring(mode)) - return 0; /* ignore non-string modes */ - else { - const char *smode = getstr(tsvalue(mode)); - const char *weakkey = strchr(smode, 'k'); - const char *weakvalue = strchr(smode, 'v'); - return ((weakkey != NULL) << 1) | (weakvalue != NULL); - } -} - - -static l_mem traversetable (global_State *g, Table *h) { - markobjectN(g, h->metatable); - switch (getmode(g, h)) { - case 0: /* not weak */ - traversestrongtable(g, h); - break; - case 1: /* weak values */ - traverseweakvalue(g, h); - break; - case 2: /* weak keys */ - traverseephemeron(g, h, 0); - break; - case 3: /* all weak; nothing to traverse */ - if (g->gcstate == GCSpropagate) - linkgclist(h, g->grayagain); /* must visit again its metatable */ - else - linkgclist(h, g->allweak); /* must clear collected entries */ - break; - } - return cast(l_mem, 1 + 2*sizenode(h) + h->asize); -} - - -static l_mem traverseudata (global_State *g, Udata *u) { - int i; - markobjectN(g, u->metatable); /* mark its metatable */ - for (i = 0; i < u->nuvalue; i++) - markvalue(g, &u->uv[i].uv); - genlink(g, obj2gco(u)); - return 1 + u->nuvalue; -} - - -/* -** Traverse a prototype. (While a prototype is being build, its -** arrays can be larger than needed; the extra slots are filled with -** NULL, so the use of 'markobjectN') -*/ -static l_mem traverseproto (global_State *g, Proto *f) { - int i; - markobjectN(g, f->source); - for (i = 0; i < f->sizek; i++) /* mark literals */ - markvalue(g, &f->k[i]); - for (i = 0; i < f->sizeupvalues; i++) /* mark upvalue names */ - markobjectN(g, f->upvalues[i].name); - for (i = 0; i < f->sizep; i++) /* mark nested protos */ - markobjectN(g, f->p[i]); - for (i = 0; i < f->sizelocvars; i++) /* mark local-variable names */ - markobjectN(g, f->locvars[i].varname); - return 1 + f->sizek + f->sizeupvalues + f->sizep + f->sizelocvars; -} - - -static l_mem traverseCclosure (global_State *g, CClosure *cl) { - int i; - for (i = 0; i < cl->nupvalues; i++) /* mark its upvalues */ - markvalue(g, &cl->upvalue[i]); - return 1 + cl->nupvalues; -} - -/* -** Traverse a Lua closure, marking its prototype and its upvalues. -** (Both can be NULL while closure is being created.) -*/ -static l_mem traverseLclosure (global_State *g, LClosure *cl) { - int i; - markobjectN(g, cl->p); /* mark its prototype */ - for (i = 0; i < cl->nupvalues; i++) { /* visit its upvalues */ - UpVal *uv = cl->upvals[i]; - markobjectN(g, uv); /* mark upvalue */ - } - return 1 + cl->nupvalues; -} - - -/* -** Traverse a thread, marking the elements in the stack up to its top -** and cleaning the rest of the stack in the final traversal. That -** ensures that the entire stack have valid (non-dead) objects. -** Threads have no barriers. In gen. mode, old threads must be visited -** at every cycle, because they might point to young objects. In inc. -** mode, the thread can still be modified before the end of the cycle, -** and therefore it must be visited again in the atomic phase. To ensure -** these visits, threads must return to a gray list if they are not new -** (which can only happen in generational mode) or if the traverse is in -** the propagate phase (which can only happen in incremental mode). -*/ -static l_mem traversethread (global_State *g, lua_State *th) { - UpVal *uv; - StkId o = th->stack.p; - if (isold(th) || g->gcstate == GCSpropagate) - linkgclist(th, g->grayagain); /* insert into 'grayagain' list */ - if (o == NULL) - return 0; /* stack not completely built yet */ - lua_assert(g->gcstate == GCSatomic || - th->openupval == NULL || isintwups(th)); - for (; o < th->top.p; o++) /* mark live elements in the stack */ - markvalue(g, s2v(o)); - for (uv = th->openupval; uv != NULL; uv = uv->u.open.next) - markobject(g, uv); /* open upvalues cannot be collected */ - if (g->gcstate == GCSatomic) { /* final traversal? */ - if (!g->gcemergency) - luaD_shrinkstack(th); /* do not change stack in emergency cycle */ - for (o = th->top.p; o < th->stack_last.p + EXTRA_STACK; o++) - setnilvalue2s(o); /* clear dead stack slice */ - /* 'remarkupvals' may have removed thread from 'twups' list */ - if (!isintwups(th) && th->openupval != NULL) { - th->twups = g->twups; /* link it back to the list */ - g->twups = th; - } - } - return 1 + (th->top.p - th->stack.p); -} - - -/* -** traverse one gray object, turning it to black. Return an estimate -** of the number of slots traversed. -*/ -static l_mem propagatemark (global_State *g) { - GCObject *o = g->gray; - nw2black(o); - g->gray = *getgclist(o); /* remove from 'gray' list */ - switch (o->tt) { - case LUA_VTABLE: return traversetable(g, gco2t(o)); - case LUA_VUSERDATA: return traverseudata(g, gco2u(o)); - case LUA_VLCL: return traverseLclosure(g, gco2lcl(o)); - case LUA_VCCL: return traverseCclosure(g, gco2ccl(o)); - case LUA_VPROTO: return traverseproto(g, gco2p(o)); - case LUA_VTHREAD: return traversethread(g, gco2th(o)); - default: lua_assert(0); return 0; - } -} - - -static void propagateall (global_State *g) { - while (g->gray) - propagatemark(g); -} - - -/* -** Traverse all ephemeron tables propagating marks from keys to values. -** Repeat until it converges, that is, nothing new is marked. 'dir' -** inverts the direction of the traversals, trying to speed up -** convergence on chains in the same table. -*/ -static void convergeephemerons (global_State *g) { - int changed; - int dir = 0; - do { - GCObject *w; - GCObject *next = g->ephemeron; /* get ephemeron list */ - g->ephemeron = NULL; /* tables may return to this list when traversed */ - changed = 0; - while ((w = next) != NULL) { /* for each ephemeron table */ - Table *h = gco2t(w); - next = h->gclist; /* list is rebuilt during loop */ - nw2black(h); /* out of the list (for now) */ - if (traverseephemeron(g, h, dir)) { /* marked some value? */ - propagateall(g); /* propagate changes */ - changed = 1; /* will have to revisit all ephemeron tables */ - } - } - dir = !dir; /* invert direction next time */ - } while (changed); /* repeat until no more changes */ -} - -/* }====================================================== */ - - -/* -** {====================================================== -** Sweep Functions -** ======================================================= -*/ - - -/* -** clear entries with unmarked keys from all weaktables in list 'l' -*/ -static void clearbykeys (global_State *g, GCObject *l) { - for (; l; l = gco2t(l)->gclist) { - Table *h = gco2t(l); - Node *limit = gnodelast(h); - Node *n; - for (n = gnode(h, 0); n < limit; n++) { - if (iscleared(g, gckeyN(n))) /* unmarked key? */ - setempty(gval(n)); /* remove entry */ - if (isempty(gval(n))) /* is entry empty? */ - clearkey(n); /* clear its key */ - } - } -} - - -/* -** clear entries with unmarked values from all weaktables in list 'l' up -** to element 'f' -*/ -static void clearbyvalues (global_State *g, GCObject *l, GCObject *f) { - for (; l != f; l = gco2t(l)->gclist) { - Table *h = gco2t(l); - Node *n, *limit = gnodelast(h); - unsigned int i; - unsigned int asize = h->asize; - for (i = 0; i < asize; i++) { - GCObject *o = gcvalarr(h, i); - if (iscleared(g, o)) /* value was collected? */ - *getArrTag(h, i) = LUA_VEMPTY; /* remove entry */ - } - for (n = gnode(h, 0); n < limit; n++) { - if (iscleared(g, gcvalueN(gval(n)))) /* unmarked value? */ - setempty(gval(n)); /* remove entry */ - if (isempty(gval(n))) /* is entry empty? */ - clearkey(n); /* clear its key */ - } - } -} - - -static void freeupval (lua_State *L, UpVal *uv) { - if (upisopen(uv)) - luaF_unlinkupval(uv); - luaM_free(L, uv); -} - - -static void freeobj (lua_State *L, GCObject *o) { - assert_code(l_mem newmem = gettotalbytes(G(L)) - objsize(o)); - switch (o->tt) { - case LUA_VPROTO: - luaF_freeproto(L, gco2p(o)); - break; - case LUA_VUPVAL: - freeupval(L, gco2upv(o)); - break; - case LUA_VLCL: { - LClosure *cl = gco2lcl(o); - luaM_freemem(L, cl, sizeLclosure(cl->nupvalues)); - break; - } - case LUA_VCCL: { - CClosure *cl = gco2ccl(o); - luaM_freemem(L, cl, sizeCclosure(cl->nupvalues)); - break; - } - case LUA_VTABLE: - luaH_free(L, gco2t(o)); - break; - case LUA_VTHREAD: - luaE_freethread(L, gco2th(o)); - break; - case LUA_VUSERDATA: { - Udata *u = gco2u(o); - luaM_freemem(L, o, sizeudata(u->nuvalue, u->len)); - break; - } - case LUA_VSHRSTR: { - TString *ts = gco2ts(o); - luaS_remove(L, ts); /* remove it from hash table */ - luaM_freemem(L, ts, sizestrshr(cast_uint(ts->shrlen))); - break; - } - case LUA_VLNGSTR: { - TString *ts = gco2ts(o); - if (ts->shrlen == LSTRMEM) /* must free external string? */ - (*ts->falloc)(ts->ud, ts->contents, ts->u.lnglen + 1, 0); - luaM_freemem(L, ts, luaS_sizelngstr(ts->u.lnglen, ts->shrlen)); - break; - } - default: lua_assert(0); - } - lua_assert(gettotalbytes(G(L)) == newmem); -} - - -/* -** sweep at most 'countin' elements from a list of GCObjects erasing dead -** objects, where a dead object is one marked with the old (non current) -** white; change all non-dead objects back to white (and new), preparing -** for next collection cycle. Return where to continue the traversal or -** NULL if list is finished. -*/ -static GCObject **sweeplist (lua_State *L, GCObject **p, l_mem countin) { - global_State *g = G(L); - int ow = otherwhite(g); - int white = luaC_white(g); /* current white */ - while (*p != NULL && countin-- > 0) { - GCObject *curr = *p; - int marked = curr->marked; - if (isdeadm(ow, marked)) { /* is 'curr' dead? */ - *p = curr->next; /* remove 'curr' from list */ - freeobj(L, curr); /* erase 'curr' */ - } - else { /* change mark to 'white' and age to 'new' */ - curr->marked = cast_byte((marked & ~maskgcbits) | white | G_NEW); - p = &curr->next; /* go to next element */ - } - } - return (*p == NULL) ? NULL : p; -} - - -/* -** sweep a list until a live object (or end of list) -*/ -static GCObject **sweeptolive (lua_State *L, GCObject **p) { - GCObject **old = p; - do { - p = sweeplist(L, p, 1); - } while (p == old); - return p; -} - -/* }====================================================== */ - - -/* -** {====================================================== -** Finalization -** ======================================================= -*/ - -/* -** If possible, shrink string table. -*/ -static void checkSizes (lua_State *L, global_State *g) { - if (!g->gcemergency) { - if (g->strt.nuse < g->strt.size / 4) /* string table too big? */ - luaS_resize(L, g->strt.size / 2); - } -} - - -/* -** Get the next udata to be finalized from the 'tobefnz' list, and -** link it back into the 'allgc' list. -*/ -static GCObject *udata2finalize (global_State *g) { - GCObject *o = g->tobefnz; /* get first element */ - lua_assert(tofinalize(o)); - g->tobefnz = o->next; /* remove it from 'tobefnz' list */ - o->next = g->allgc; /* return it to 'allgc' list */ - g->allgc = o; - resetbit(o->marked, FINALIZEDBIT); /* object is "normal" again */ - if (issweepphase(g)) - makewhite(g, o); /* "sweep" object */ - else if (getage(o) == G_OLD1) - g->firstold1 = o; /* it is the first OLD1 object in the list */ - return o; -} - - -static void dothecall (lua_State *L, void *ud) { - UNUSED(ud); - luaD_callnoyield(L, L->top.p - 2, 0); -} - - -static void GCTM (lua_State *L) { - global_State *g = G(L); - const TValue *tm; - TValue v; - lua_assert(!g->gcemergency); - setgcovalue(L, &v, udata2finalize(g)); - tm = luaT_gettmbyobj(L, &v, TM_GC); - if (!notm(tm)) { /* is there a finalizer? */ - TStatus status; - lu_byte oldah = L->allowhook; - lu_byte oldgcstp = g->gcstp; - g->gcstp |= GCSTPGC; /* avoid GC steps */ - L->allowhook = 0; /* stop debug hooks during GC metamethod */ - setobj2s(L, L->top.p++, tm); /* push finalizer... */ - setobj2s(L, L->top.p++, &v); /* ... and its argument */ - L->ci->callstatus |= CIST_FIN; /* will run a finalizer */ - status = luaD_pcall(L, dothecall, NULL, savestack(L, L->top.p - 2), 0); - L->ci->callstatus &= ~CIST_FIN; /* not running a finalizer anymore */ - L->allowhook = oldah; /* restore hooks */ - g->gcstp = oldgcstp; /* restore state */ - if (l_unlikely(status != LUA_OK)) { /* error while running __gc? */ - luaE_warnerror(L, "__gc"); - L->top.p--; /* pops error object */ - } - } -} - - -/* -** call all pending finalizers -*/ -static void callallpendingfinalizers (lua_State *L) { - global_State *g = G(L); - while (g->tobefnz) - GCTM(L); -} - - -/* -** find last 'next' field in list 'p' list (to add elements in its end) -*/ -static GCObject **findlast (GCObject **p) { - while (*p != NULL) - p = &(*p)->next; - return p; -} - - -/* -** Move all unreachable objects (or 'all' objects) that need -** finalization from list 'finobj' to list 'tobefnz' (to be finalized). -** (Note that objects after 'finobjold1' cannot be white, so they -** don't need to be traversed. In incremental mode, 'finobjold1' is NULL, -** so the whole list is traversed.) -*/ -static void separatetobefnz (global_State *g, int all) { - GCObject *curr; - GCObject **p = &g->finobj; - GCObject **lastnext = findlast(&g->tobefnz); - while ((curr = *p) != g->finobjold1) { /* traverse all finalizable objects */ - lua_assert(tofinalize(curr)); - if (!(iswhite(curr) || all)) /* not being collected? */ - p = &curr->next; /* don't bother with it */ - else { - if (curr == g->finobjsur) /* removing 'finobjsur'? */ - g->finobjsur = curr->next; /* correct it */ - *p = curr->next; /* remove 'curr' from 'finobj' list */ - curr->next = *lastnext; /* link at the end of 'tobefnz' list */ - *lastnext = curr; - lastnext = &curr->next; - } - } -} - - -/* -** If pointer 'p' points to 'o', move it to the next element. -*/ -static void checkpointer (GCObject **p, GCObject *o) { - if (o == *p) - *p = o->next; -} - - -/* -** Correct pointers to objects inside 'allgc' list when -** object 'o' is being removed from the list. -*/ -static void correctpointers (global_State *g, GCObject *o) { - checkpointer(&g->survival, o); - checkpointer(&g->old1, o); - checkpointer(&g->reallyold, o); - checkpointer(&g->firstold1, o); -} - - -/* -** if object 'o' has a finalizer, remove it from 'allgc' list (must -** search the list to find it) and link it in 'finobj' list. -*/ -void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt) { - global_State *g = G(L); - if (tofinalize(o) || /* obj. is already marked... */ - gfasttm(g, mt, TM_GC) == NULL || /* or has no finalizer... */ - (g->gcstp & GCSTPCLS)) /* or closing state? */ - return; /* nothing to be done */ - else { /* move 'o' to 'finobj' list */ - GCObject **p; - if (issweepphase(g)) { - makewhite(g, o); /* "sweep" object 'o' */ - if (g->sweepgc == &o->next) /* should not remove 'sweepgc' object */ - g->sweepgc = sweeptolive(L, g->sweepgc); /* change 'sweepgc' */ - } - else - correctpointers(g, o); - /* search for pointer pointing to 'o' */ - for (p = &g->allgc; *p != o; p = &(*p)->next) { /* empty */ } - *p = o->next; /* remove 'o' from 'allgc' list */ - o->next = g->finobj; /* link it in 'finobj' list */ - g->finobj = o; - l_setbit(o->marked, FINALIZEDBIT); /* mark it as such */ - } -} - -/* }====================================================== */ - - -/* -** {====================================================== -** Generational Collector -** ======================================================= -*/ - -/* -** Fields 'GCmarked' and 'GCmajorminor' are used to control the pace and -** the mode of the collector. They play several roles, depending on the -** mode of the collector: -** * KGC_INC: -** GCmarked: number of marked bytes during a cycle. -** GCmajorminor: not used. -** * KGC_GENMINOR -** GCmarked: number of bytes that became old since last major collection. -** GCmajorminor: number of bytes marked in last major collection. -** * KGC_GENMAJOR -** GCmarked: number of bytes that became old since last major collection. -** GCmajorminor: number of bytes marked in last major collection. -*/ - - -/* -** Set the "time" to wait before starting a new incremental cycle; -** cycle will start when number of bytes in use hits the threshold of -** approximately (marked * pause / 100). -*/ -static void setpause (global_State *g) { - l_mem threshold = applygcparam(g, PAUSE, g->GCmarked); - l_mem debt = threshold - gettotalbytes(g); - if (debt < 0) debt = 0; - luaE_setdebt(g, debt); -} - - -/* -** Sweep a list of objects to enter generational mode. Deletes dead -** objects and turns the non dead to old. All non-dead threads---which -** are now old---must be in a gray list. Everything else is not in a -** gray list. Open upvalues are also kept gray. -*/ -static void sweep2old (lua_State *L, GCObject **p) { - GCObject *curr; - global_State *g = G(L); - while ((curr = *p) != NULL) { - if (iswhite(curr)) { /* is 'curr' dead? */ - lua_assert(isdead(g, curr)); - *p = curr->next; /* remove 'curr' from list */ - freeobj(L, curr); /* erase 'curr' */ - } - else { /* all surviving objects become old */ - setage(curr, G_OLD); - if (curr->tt == LUA_VTHREAD) { /* threads must be watched */ - lua_State *th = gco2th(curr); - linkgclist(th, g->grayagain); /* insert into 'grayagain' list */ - } - else if (curr->tt == LUA_VUPVAL && upisopen(gco2upv(curr))) - set2gray(curr); /* open upvalues are always gray */ - else /* everything else is black */ - nw2black(curr); - p = &curr->next; /* go to next element */ - } - } -} - - -/* -** Sweep for generational mode. Delete dead objects. (Because the -** collection is not incremental, there are no "new white" objects -** during the sweep. So, any white object must be dead.) For -** non-dead objects, advance their ages and clear the color of -** new objects. (Old objects keep their colors.) -** The ages of G_TOUCHED1 and G_TOUCHED2 objects cannot be advanced -** here, because these old-generation objects are usually not swept -** here. They will all be advanced in 'correctgraylist'. That function -** will also remove objects turned white here from any gray list. -*/ -static GCObject **sweepgen (lua_State *L, global_State *g, GCObject **p, - GCObject *limit, GCObject **pfirstold1, - l_mem *paddedold) { - static const lu_byte nextage[] = { - G_SURVIVAL, /* from G_NEW */ - G_OLD1, /* from G_SURVIVAL */ - G_OLD1, /* from G_OLD0 */ - G_OLD, /* from G_OLD1 */ - G_OLD, /* from G_OLD (do not change) */ - G_TOUCHED1, /* from G_TOUCHED1 (do not change) */ - G_TOUCHED2 /* from G_TOUCHED2 (do not change) */ - }; - l_mem addedold = 0; - int white = luaC_white(g); - GCObject *curr; - while ((curr = *p) != limit) { - if (iswhite(curr)) { /* is 'curr' dead? */ - lua_assert(!isold(curr) && isdead(g, curr)); - *p = curr->next; /* remove 'curr' from list */ - freeobj(L, curr); /* erase 'curr' */ - } - else { /* correct mark and age */ - int age = getage(curr); - if (age == G_NEW) { /* new objects go back to white */ - int marked = curr->marked & ~maskgcbits; /* erase GC bits */ - curr->marked = cast_byte(marked | G_SURVIVAL | white); - } - else { /* all other objects will be old, and so keep their color */ - lua_assert(age != G_OLD1); /* advanced in 'markold' */ - setage(curr, nextage[age]); - if (getage(curr) == G_OLD1) { - addedold += objsize(curr); /* bytes becoming old */ - if (*pfirstold1 == NULL) - *pfirstold1 = curr; /* first OLD1 object in the list */ - } - } - p = &curr->next; /* go to next element */ - } - } - *paddedold += addedold; - return p; -} - - -/* -** Correct a list of gray objects. Return a pointer to the last element -** left on the list, so that we can link another list to the end of -** this one. -** Because this correction is done after sweeping, young objects might -** be turned white and still be in the list. They are only removed. -** 'TOUCHED1' objects are advanced to 'TOUCHED2' and remain on the list; -** Non-white threads also remain on the list. 'TOUCHED2' objects and -** anything else become regular old, are marked black, and are removed -** from the list. -*/ -static GCObject **correctgraylist (GCObject **p) { - GCObject *curr; - while ((curr = *p) != NULL) { - GCObject **next = getgclist(curr); - if (iswhite(curr)) - goto remove; /* remove all white objects */ - else if (getage(curr) == G_TOUCHED1) { /* touched in this cycle? */ - lua_assert(isgray(curr)); - nw2black(curr); /* make it black, for next barrier */ - setage(curr, G_TOUCHED2); - goto remain; /* keep it in the list and go to next element */ - } - else if (curr->tt == LUA_VTHREAD) { - lua_assert(isgray(curr)); - goto remain; /* keep non-white threads on the list */ - } - else { /* everything else is removed */ - lua_assert(isold(curr)); /* young objects should be white here */ - if (getage(curr) == G_TOUCHED2) /* advance from TOUCHED2... */ - setage(curr, G_OLD); /* ... to OLD */ - nw2black(curr); /* make object black (to be removed) */ - goto remove; - } - remove: *p = *next; continue; - remain: p = next; continue; - } - return p; -} - - -/* -** Correct all gray lists, coalescing them into 'grayagain'. -*/ -static void correctgraylists (global_State *g) { - GCObject **list = correctgraylist(&g->grayagain); - *list = g->weak; g->weak = NULL; - list = correctgraylist(list); - *list = g->allweak; g->allweak = NULL; - list = correctgraylist(list); - *list = g->ephemeron; g->ephemeron = NULL; - correctgraylist(list); -} - - -/* -** Mark black 'OLD1' objects when starting a new young collection. -** Gray objects are already in some gray list, and so will be visited in -** the atomic step. -*/ -static void markold (global_State *g, GCObject *from, GCObject *to) { - GCObject *p; - for (p = from; p != to; p = p->next) { - if (getage(p) == G_OLD1) { - lua_assert(!iswhite(p)); - setage(p, G_OLD); /* now they are old */ - if (isblack(p)) - reallymarkobject(g, p); - } - } -} - - -/* -** Finish a young-generation collection. -*/ -static void finishgencycle (lua_State *L, global_State *g) { - correctgraylists(g); - checkSizes(L, g); - g->gcstate = GCSpropagate; /* skip restart */ - if (g->tobefnz != NULL && !g->gcemergency && luaD_checkminstack(L)) - callallpendingfinalizers(L); -} - - -/* -** Shifts from a minor collection to major collections. It starts in -** the "sweep all" state to clear all objects, which are mostly black -** in generational mode. -*/ -static void minor2inc (lua_State *L, global_State *g, lu_byte kind) { - g->GCmajorminor = g->GCmarked; /* number of live bytes */ - g->gckind = kind; - g->reallyold = g->old1 = g->survival = NULL; - g->finobjrold = g->finobjold1 = g->finobjsur = NULL; - entersweep(L); /* continue as an incremental cycle */ - /* set a debt equal to the step size */ - luaE_setdebt(g, applygcparam(g, STEPSIZE, 100)); -} - - -/* -** Decide whether to shift to major mode. It shifts if the accumulated -** number of added old bytes (counted in 'GCmarked') is larger than -** 'minormajor'% of the number of lived bytes after the last major -** collection. (This number is kept in 'GCmajorminor'.) -*/ -static int checkminormajor (global_State *g) { - l_mem limit = applygcparam(g, MINORMAJOR, g->GCmajorminor); - if (limit == 0) - return 0; /* special case: 'minormajor' 0 stops major collections */ - return (g->GCmarked >= limit); -} - -/* -** Does a young collection. First, mark 'OLD1' objects. Then does the -** atomic step. Then, check whether to continue in minor mode. If so, -** sweep all lists and advance pointers. Finally, finish the collection. -*/ -static void youngcollection (lua_State *L, global_State *g) { - l_mem addedold1 = 0; - l_mem marked = g->GCmarked; /* preserve 'g->GCmarked' */ - GCObject **psurvival; /* to point to first non-dead survival object */ - GCObject *dummy; /* dummy out parameter to 'sweepgen' */ - lua_assert(g->gcstate == GCSpropagate); - if (g->firstold1) { /* are there regular OLD1 objects? */ - markold(g, g->firstold1, g->reallyold); /* mark them */ - g->firstold1 = NULL; /* no more OLD1 objects (for now) */ - } - markold(g, g->finobj, g->finobjrold); - markold(g, g->tobefnz, NULL); - - atomic(L); /* will lose 'g->marked' */ - - /* sweep nursery and get a pointer to its last live element */ - g->gcstate = GCSswpallgc; - psurvival = sweepgen(L, g, &g->allgc, g->survival, &g->firstold1, &addedold1); - /* sweep 'survival' */ - sweepgen(L, g, psurvival, g->old1, &g->firstold1, &addedold1); - g->reallyold = g->old1; - g->old1 = *psurvival; /* 'survival' survivals are old now */ - g->survival = g->allgc; /* all news are survivals */ - - /* repeat for 'finobj' lists */ - dummy = NULL; /* no 'firstold1' optimization for 'finobj' lists */ - psurvival = sweepgen(L, g, &g->finobj, g->finobjsur, &dummy, &addedold1); - /* sweep 'survival' */ - sweepgen(L, g, psurvival, g->finobjold1, &dummy, &addedold1); - g->finobjrold = g->finobjold1; - g->finobjold1 = *psurvival; /* 'survival' survivals are old now */ - g->finobjsur = g->finobj; /* all news are survivals */ - - sweepgen(L, g, &g->tobefnz, NULL, &dummy, &addedold1); - - /* keep total number of added old1 bytes */ - g->GCmarked = marked + addedold1; - - /* decide whether to shift to major mode */ - if (checkminormajor(g)) { - minor2inc(L, g, KGC_GENMAJOR); /* go to major mode */ - g->GCmarked = 0; /* avoid pause in first major cycle (see 'setpause') */ - } - else - finishgencycle(L, g); /* still in minor mode; finish it */ -} - - -/* -** Clears all gray lists, sweeps objects, and prepare sublists to enter -** generational mode. The sweeps remove dead objects and turn all -** surviving objects to old. Threads go back to 'grayagain'; everything -** else is turned black (not in any gray list). -*/ -static void atomic2gen (lua_State *L, global_State *g) { - cleargraylists(g); - /* sweep all elements making them old */ - g->gcstate = GCSswpallgc; - sweep2old(L, &g->allgc); - /* everything alive now is old */ - g->reallyold = g->old1 = g->survival = g->allgc; - g->firstold1 = NULL; /* there are no OLD1 objects anywhere */ - - /* repeat for 'finobj' lists */ - sweep2old(L, &g->finobj); - g->finobjrold = g->finobjold1 = g->finobjsur = g->finobj; - - sweep2old(L, &g->tobefnz); - - g->gckind = KGC_GENMINOR; - g->GCmajorminor = g->GCmarked; /* "base" for number of bytes */ - g->GCmarked = 0; /* to count the number of added old1 bytes */ - finishgencycle(L, g); -} - - -/* -** Set debt for the next minor collection, which will happen when -** total number of bytes grows 'genminormul'% in relation to -** the base, GCmajorminor, which is the number of bytes being used -** after the last major collection. -*/ -static void setminordebt (global_State *g) { - luaE_setdebt(g, applygcparam(g, MINORMUL, g->GCmajorminor)); -} - - -/* -** Enter generational mode. Must go until the end of an atomic cycle -** to ensure that all objects are correctly marked and weak tables -** are cleared. Then, turn all objects into old and finishes the -** collection. -*/ -static void entergen (lua_State *L, global_State *g) { - luaC_runtilstate(L, GCSpause, 1); /* prepare to start a new cycle */ - luaC_runtilstate(L, GCSpropagate, 1); /* start new cycle */ - atomic(L); /* propagates all and then do the atomic stuff */ - atomic2gen(L, g); - setminordebt(g); /* set debt assuming next cycle will be minor */ -} - - -/* -** Change collector mode to 'newmode'. -*/ -void luaC_changemode (lua_State *L, int newmode) { - global_State *g = G(L); - if (g->gckind == KGC_GENMAJOR) /* doing major collections? */ - g->gckind = KGC_INC; /* already incremental but in name */ - if (newmode != g->gckind) { /* does it need to change? */ - if (newmode == KGC_INC) /* entering incremental mode? */ - minor2inc(L, g, KGC_INC); /* entering incremental mode */ - else { - lua_assert(newmode == KGC_GENMINOR); - entergen(L, g); - } - } -} - - -/* -** Does a full collection in generational mode. -*/ -static void fullgen (lua_State *L, global_State *g) { - minor2inc(L, g, KGC_INC); - entergen(L, g); -} - - -/* -** After an atomic incremental step from a major collection, -** check whether collector could return to minor collections. -** It checks whether the number of bytes 'tobecollected' -** is greater than 'majorminor'% of the number of bytes added -** since the last collection ('addedbytes'). -*/ -static int checkmajorminor (lua_State *L, global_State *g) { - if (g->gckind == KGC_GENMAJOR) { /* generational mode? */ - l_mem numbytes = gettotalbytes(g); - l_mem addedbytes = numbytes - g->GCmajorminor; - l_mem limit = applygcparam(g, MAJORMINOR, addedbytes); - l_mem tobecollected = numbytes - g->GCmarked; - if (tobecollected > limit) { - atomic2gen(L, g); /* return to generational mode */ - setminordebt(g); - return 1; /* exit incremental collection */ - } - } - g->GCmajorminor = g->GCmarked; /* prepare for next collection */ - return 0; /* stay doing incremental collections */ -} - -/* }====================================================== */ - - -/* -** {====================================================== -** GC control -** ======================================================= -*/ - - -/* -** Enter first sweep phase. -** The call to 'sweeptolive' makes the pointer point to an object -** inside the list (instead of to the header), so that the real sweep do -** not need to skip objects created between "now" and the start of the -** real sweep. -*/ -static void entersweep (lua_State *L) { - global_State *g = G(L); - g->gcstate = GCSswpallgc; - lua_assert(g->sweepgc == NULL); - g->sweepgc = sweeptolive(L, &g->allgc); -} - - -/* -** Delete all objects in list 'p' until (but not including) object -** 'limit'. -*/ -static void deletelist (lua_State *L, GCObject *p, GCObject *limit) { - while (p != limit) { - GCObject *next = p->next; - freeobj(L, p); - p = next; - } -} - - -/* -** Call all finalizers of the objects in the given Lua state, and -** then free all objects, except for the main thread. -*/ -void luaC_freeallobjects (lua_State *L) { - global_State *g = G(L); - g->gcstp = GCSTPCLS; /* no extra finalizers after here */ - luaC_changemode(L, KGC_INC); - separatetobefnz(g, 1); /* separate all objects with finalizers */ - lua_assert(g->finobj == NULL); - callallpendingfinalizers(L); - deletelist(L, g->allgc, obj2gco(mainthread(g))); - lua_assert(g->finobj == NULL); /* no new finalizers */ - deletelist(L, g->fixedgc, NULL); /* collect fixed objects */ - lua_assert(g->strt.nuse == 0); -} - - -static void atomic (lua_State *L) { - global_State *g = G(L); - GCObject *origweak, *origall; - GCObject *grayagain = g->grayagain; /* save original list */ - g->grayagain = NULL; - lua_assert(g->ephemeron == NULL && g->weak == NULL); - lua_assert(!iswhite(mainthread(g))); - g->gcstate = GCSatomic; - markobject(g, L); /* mark running thread */ - /* registry and global metatables may be changed by API */ - markvalue(g, &g->l_registry); - markmt(g); /* mark global metatables */ - propagateall(g); /* empties 'gray' list */ - /* remark occasional upvalues of (maybe) dead threads */ - remarkupvals(g); - propagateall(g); /* propagate changes */ - g->gray = grayagain; - propagateall(g); /* traverse 'grayagain' list */ - convergeephemerons(g); - /* at this point, all strongly accessible objects are marked. */ - /* Clear values from weak tables, before checking finalizers */ - clearbyvalues(g, g->weak, NULL); - clearbyvalues(g, g->allweak, NULL); - origweak = g->weak; origall = g->allweak; - separatetobefnz(g, 0); /* separate objects to be finalized */ - markbeingfnz(g); /* mark objects that will be finalized */ - propagateall(g); /* remark, to propagate 'resurrection' */ - convergeephemerons(g); - /* at this point, all resurrected objects are marked. */ - /* remove dead objects from weak tables */ - clearbykeys(g, g->ephemeron); /* clear keys from all ephemeron */ - clearbykeys(g, g->allweak); /* clear keys from all 'allweak' */ - /* clear values from resurrected weak tables */ - clearbyvalues(g, g->weak, origweak); - clearbyvalues(g, g->allweak, origall); - luaS_clearcache(g); - g->currentwhite = cast_byte(otherwhite(g)); /* flip current white */ - lua_assert(g->gray == NULL); -} - - -/* -** Do a sweep step. The normal case (not fast) sweeps at most GCSWEEPMAX -** elements. The fast case sweeps the whole list. -*/ -static void sweepstep (lua_State *L, global_State *g, - lu_byte nextstate, GCObject **nextlist, int fast) { - if (g->sweepgc) - g->sweepgc = sweeplist(L, g->sweepgc, fast ? MAX_LMEM : GCSWEEPMAX); - else { /* enter next state */ - g->gcstate = nextstate; - g->sweepgc = nextlist; - } -} - - -/* -** Performs one incremental "step" in an incremental garbage collection. -** For indivisible work, a step goes to the next state. When marking -** (propagating), a step traverses one object. When sweeping, a step -** sweeps GCSWEEPMAX objects, to avoid a big overhead for sweeping -** objects one by one. (Sweeping is inexpensive, no matter the -** object.) When 'fast' is true, 'singlestep' tries to finish a state -** "as fast as possible". In particular, it skips the propagation -** phase and leaves all objects to be traversed by the atomic phase: -** That avoids traversing twice some objects, such as threads and -** weak tables. -*/ - -#define step2pause -3 /* finished collection; entered pause state */ -#define atomicstep -2 /* atomic step */ -#define step2minor -1 /* moved to minor collections */ - - -static l_mem singlestep (lua_State *L, int fast) { - global_State *g = G(L); - l_mem stepresult; - lua_assert(!g->gcstopem); /* collector is not reentrant */ - g->gcstopem = 1; /* no emergency collections while collecting */ - switch (g->gcstate) { - case GCSpause: { - restartcollection(g); - g->gcstate = GCSpropagate; - stepresult = 1; - break; - } - case GCSpropagate: { - if (fast || g->gray == NULL) { - g->gcstate = GCSenteratomic; /* finish propagate phase */ - stepresult = 1; - } - else - stepresult = propagatemark(g); /* traverse one gray object */ - break; - } - case GCSenteratomic: { - atomic(L); - if (checkmajorminor(L, g)) - stepresult = step2minor; - else { - entersweep(L); - stepresult = atomicstep; - } - break; - } - case GCSswpallgc: { /* sweep "regular" objects */ - sweepstep(L, g, GCSswpfinobj, &g->finobj, fast); - stepresult = GCSWEEPMAX; - break; - } - case GCSswpfinobj: { /* sweep objects with finalizers */ - sweepstep(L, g, GCSswptobefnz, &g->tobefnz, fast); - stepresult = GCSWEEPMAX; - break; - } - case GCSswptobefnz: { /* sweep objects to be finalized */ - sweepstep(L, g, GCSswpend, NULL, fast); - stepresult = GCSWEEPMAX; - break; - } - case GCSswpend: { /* finish sweeps */ - checkSizes(L, g); - g->gcstate = GCScallfin; - stepresult = GCSWEEPMAX; - break; - } - case GCScallfin: { /* call finalizers */ - if (g->tobefnz && !g->gcemergency && luaD_checkminstack(L)) { - g->gcstopem = 0; /* ok collections during finalizers */ - GCTM(L); /* call one finalizer */ - stepresult = CWUFIN; - } - else { /* no more finalizers or emergency mode or not enough stack - to run finalizers */ - g->gcstate = GCSpause; /* finish collection */ - stepresult = step2pause; - } - break; - } - default: lua_assert(0); return 0; - } - g->gcstopem = 0; - return stepresult; -} - - -/* -** Advances the garbage collector until it reaches the given state. -** (The option 'fast' is only for testing; in normal code, 'fast' -** here is always true.) -*/ -void luaC_runtilstate (lua_State *L, int state, int fast) { - global_State *g = G(L); - lua_assert(g->gckind == KGC_INC); - while (state != g->gcstate) - singlestep(L, fast); -} - - - -/* -** Performs a basic incremental step. The step size is -** converted from bytes to "units of work"; then the function loops -** running single steps until adding that many units of work or -** finishing a cycle (pause state). Finally, it sets the debt that -** controls when next step will be performed. -*/ -static void incstep (lua_State *L, global_State *g) { - l_mem stepsize = applygcparam(g, STEPSIZE, 100); - l_mem work2do = applygcparam(g, STEPMUL, stepsize / cast_int(sizeof(void*))); - l_mem stres; - int fast = (work2do == 0); /* special case: do a full collection */ - do { /* repeat until enough work */ - stres = singlestep(L, fast); /* perform one single step */ - if (stres == step2minor) /* returned to minor collections? */ - return; /* nothing else to be done here */ - else if (stres == step2pause || (stres == atomicstep && !fast)) - break; /* end of cycle or atomic */ - else - work2do -= stres; - } while (fast || work2do > 0); - if (g->gcstate == GCSpause) - setpause(g); /* pause until next cycle */ - else - luaE_setdebt(g, stepsize); -} - - -#if !defined(luai_tracegc) -#define luai_tracegc(L,f) ((void)0) -#endif - -/* -** Performs a basic GC step if collector is running. (If collector was -** stopped by the user, set a reasonable debt to avoid it being called -** at every single check.) -*/ -void luaC_step (lua_State *L) { - global_State *g = G(L); - lua_assert(!g->gcemergency); - if (!gcrunning(g)) { /* not running? */ - if (g->gcstp & GCSTPUSR) /* stopped by the user? */ - luaE_setdebt(g, 20000); - } - else { - luai_tracegc(L, 1); /* for internal debugging */ - switch (g->gckind) { - case KGC_INC: case KGC_GENMAJOR: - incstep(L, g); - break; - case KGC_GENMINOR: - youngcollection(L, g); - setminordebt(g); - break; - } - luai_tracegc(L, 0); /* for internal debugging */ - } -} - - -/* -** Perform a full collection in incremental mode. -** Before running the collection, check 'keepinvariant'; if it is true, -** there may be some objects marked as black, so the collector has -** to sweep all objects to turn them back to white (as white has not -** changed, nothing will be collected). -*/ -static void fullinc (lua_State *L, global_State *g) { - if (keepinvariant(g)) /* black objects? */ - entersweep(L); /* sweep everything to turn them back to white */ - /* finish any pending sweep phase to start a new cycle */ - luaC_runtilstate(L, GCSpause, 1); - luaC_runtilstate(L, GCScallfin, 1); /* run up to finalizers */ - luaC_runtilstate(L, GCSpause, 1); /* finish collection */ - setpause(g); -} - - -/* -** Performs a full GC cycle; if 'isemergency', set a flag to avoid -** some operations which could change the interpreter state in some -** unexpected ways (running finalizers and shrinking some structures). -*/ -void luaC_fullgc (lua_State *L, int isemergency) { - global_State *g = G(L); - lua_assert(!g->gcemergency); - g->gcemergency = cast_byte(isemergency); /* set flag */ - switch (g->gckind) { - case KGC_GENMINOR: fullgen(L, g); break; - case KGC_INC: fullinc(L, g); break; - case KGC_GENMAJOR: - g->gckind = KGC_INC; - fullinc(L, g); - g->gckind = KGC_GENMAJOR; - break; - } - g->gcemergency = 0; -} - -/* }====================================================== */ - - diff --git a/lib/lua/lgc.h b/lib/lua/lgc.h deleted file mode 100644 index ee05417..0000000 --- a/lib/lua/lgc.h +++ /dev/null @@ -1,268 +0,0 @@ -/* -** $Id: lgc.h $ -** Garbage Collector -** See Copyright Notice in lua.h -*/ - -#ifndef lgc_h -#define lgc_h - - -#include - - -#include "lobject.h" -#include "lstate.h" - -/* -** Collectable objects may have one of three colors: white, which means -** the object is not marked; gray, which means the object is marked, but -** its references may be not marked; and black, which means that the -** object and all its references are marked. The main invariant of the -** garbage collector, while marking objects, is that a black object can -** never point to a white one. Moreover, any gray object must be in a -** "gray list" (gray, grayagain, weak, allweak, ephemeron) so that it -** can be visited again before finishing the collection cycle. (Open -** upvalues are an exception to this rule, as they are attached to -** a corresponding thread.) These lists have no meaning when the -** invariant is not being enforced (e.g., sweep phase). -*/ - - -/* -** Possible states of the Garbage Collector -*/ -#define GCSpropagate 0 -#define GCSenteratomic 1 -#define GCSatomic 2 -#define GCSswpallgc 3 -#define GCSswpfinobj 4 -#define GCSswptobefnz 5 -#define GCSswpend 6 -#define GCScallfin 7 -#define GCSpause 8 - - -#define issweepphase(g) \ - (GCSswpallgc <= (g)->gcstate && (g)->gcstate <= GCSswpend) - - -/* -** macro to tell when main invariant (white objects cannot point to black -** ones) must be kept. During a collection, the sweep phase may break -** the invariant, as objects turned white may point to still-black -** objects. The invariant is restored when sweep ends and all objects -** are white again. -*/ - -#define keepinvariant(g) ((g)->gcstate <= GCSatomic) - - -/* -** some useful bit tricks -*/ -#define resetbits(x,m) ((x) &= cast_byte(~(m))) -#define setbits(x,m) ((x) |= (m)) -#define testbits(x,m) ((x) & (m)) -#define bitmask(b) (1<<(b)) -#define bit2mask(b1,b2) (bitmask(b1) | bitmask(b2)) -#define l_setbit(x,b) setbits(x, bitmask(b)) -#define resetbit(x,b) resetbits(x, bitmask(b)) -#define testbit(x,b) testbits(x, bitmask(b)) - - -/* -** Layout for bit use in 'marked' field. First three bits are -** used for object "age" in generational mode. Last bit is used -** by tests. -*/ -#define WHITE0BIT 3 /* object is white (type 0) */ -#define WHITE1BIT 4 /* object is white (type 1) */ -#define BLACKBIT 5 /* object is black */ -#define FINALIZEDBIT 6 /* object has been marked for finalization */ - -#define TESTBIT 7 - - - -#define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT) - - -#define iswhite(x) testbits((x)->marked, WHITEBITS) -#define isblack(x) testbit((x)->marked, BLACKBIT) -#define isgray(x) /* neither white nor black */ \ - (!testbits((x)->marked, WHITEBITS | bitmask(BLACKBIT))) - -#define tofinalize(x) testbit((x)->marked, FINALIZEDBIT) - -#define otherwhite(g) ((g)->currentwhite ^ WHITEBITS) -#define isdeadm(ow,m) ((m) & (ow)) -#define isdead(g,v) isdeadm(otherwhite(g), (v)->marked) - -#define changewhite(x) ((x)->marked ^= WHITEBITS) -#define nw2black(x) \ - check_exp(!iswhite(x), l_setbit((x)->marked, BLACKBIT)) - -#define luaC_white(g) cast_byte((g)->currentwhite & WHITEBITS) - - -/* object age in generational mode */ -#define G_NEW 0 /* created in current cycle */ -#define G_SURVIVAL 1 /* created in previous cycle */ -#define G_OLD0 2 /* marked old by frw. barrier in this cycle */ -#define G_OLD1 3 /* first full cycle as old */ -#define G_OLD 4 /* really old object (not to be visited) */ -#define G_TOUCHED1 5 /* old object touched this cycle */ -#define G_TOUCHED2 6 /* old object touched in previous cycle */ - -#define AGEBITS 7 /* all age bits (111) */ - -#define getage(o) ((o)->marked & AGEBITS) -#define setage(o,a) ((o)->marked = cast_byte(((o)->marked & (~AGEBITS)) | a)) -#define isold(o) (getage(o) > G_SURVIVAL) - - -/* -** In generational mode, objects are created 'new'. After surviving one -** cycle, they become 'survival'. Both 'new' and 'survival' can point -** to any other object, as they are traversed at the end of the cycle. -** We call them both 'young' objects. -** If a survival object survives another cycle, it becomes 'old1'. -** 'old1' objects can still point to survival objects (but not to -** new objects), so they still must be traversed. After another cycle -** (that, being old, 'old1' objects will "survive" no matter what) -** finally the 'old1' object becomes really 'old', and then they -** are no more traversed. -** -** To keep its invariants, the generational mode uses the same barriers -** also used by the incremental mode. If a young object is caught in a -** forward barrier, it cannot become old immediately, because it can -** still point to other young objects. Instead, it becomes 'old0', -** which in the next cycle becomes 'old1'. So, 'old0' objects is -** old but can point to new and survival objects; 'old1' is old -** but cannot point to new objects; and 'old' cannot point to any -** young object. -** -** If any old object ('old0', 'old1', 'old') is caught in a back -** barrier, it becomes 'touched1' and goes into a gray list, to be -** visited at the end of the cycle. There it evolves to 'touched2', -** which can point to survivals but not to new objects. In yet another -** cycle then it becomes 'old' again. -** -** The generational mode must also control the colors of objects, -** because of the barriers. While the mutator is running, young objects -** are kept white. 'old', 'old1', and 'touched2' objects are kept black, -** as they cannot point to new objects; exceptions are threads and open -** upvalues, which age to 'old1' and 'old' but are kept gray. 'old0' -** objects may be gray or black, as in the incremental mode. 'touched1' -** objects are kept gray, as they must be visited again at the end of -** the cycle. -*/ - - -/* -** {====================================================== -** Default Values for GC parameters -** ======================================================= -*/ - -/* -** Minor collections will shift to major ones after LUAI_MINORMAJOR% -** bytes become old. -*/ -#define LUAI_MINORMAJOR 70 - -/* -** Major collections will shift to minor ones after a collection -** collects at least LUAI_MAJORMINOR% of the new bytes. -*/ -#define LUAI_MAJORMINOR 50 - -/* -** A young (minor) collection will run after creating LUAI_GENMINORMUL% -** new bytes. -*/ -#define LUAI_GENMINORMUL 20 - - -/* incremental */ - -/* Number of bytes must be LUAI_GCPAUSE% before starting new cycle */ -#define LUAI_GCPAUSE 250 - -/* -** Step multiplier: The collector handles LUAI_GCMUL% work units for -** each new allocated word. (Each "work unit" corresponds roughly to -** sweeping one object or traversing one slot.) -*/ -#define LUAI_GCMUL 200 - -/* How many bytes to allocate before next GC step */ -#define LUAI_GCSTEPSIZE (200 * sizeof(Table)) - - -#define setgcparam(g,p,v) (g->gcparams[LUA_GCP##p] = luaO_codeparam(v)) -#define applygcparam(g,p,x) luaO_applyparam(g->gcparams[LUA_GCP##p], x) - -/* }====================================================== */ - - -/* -** Control when GC is running: -*/ -#define GCSTPUSR 1 /* bit true when GC stopped by user */ -#define GCSTPGC 2 /* bit true when GC stopped by itself */ -#define GCSTPCLS 4 /* bit true when closing Lua state */ -#define gcrunning(g) ((g)->gcstp == 0) - - -/* -** Does one step of collection when debt becomes zero. 'pre'/'pos' -** allows some adjustments to be done only when needed. macro -** 'condchangemem' is used only for heavy tests (forcing a full -** GC cycle on every opportunity) -*/ - -#if !defined(HARDMEMTESTS) -#define condchangemem(L,pre,pos,emg) ((void)0) -#else -#define condchangemem(L,pre,pos,emg) \ - { if (gcrunning(G(L))) { pre; luaC_fullgc(L, emg); pos; } } -#endif - -#define luaC_condGC(L,pre,pos) \ - { if (G(L)->GCdebt <= 0) { pre; luaC_step(L); pos;}; \ - condchangemem(L,pre,pos,0); } - -/* more often than not, 'pre'/'pos' are empty */ -#define luaC_checkGC(L) luaC_condGC(L,(void)0,(void)0) - - -#define luaC_objbarrier(L,p,o) ( \ - (isblack(p) && iswhite(o)) ? \ - luaC_barrier_(L,obj2gco(p),obj2gco(o)) : cast_void(0)) - -#define luaC_barrier(L,p,v) ( \ - iscollectable(v) ? luaC_objbarrier(L,p,gcvalue(v)) : cast_void(0)) - -#define luaC_objbarrierback(L,p,o) ( \ - (isblack(p) && iswhite(o)) ? luaC_barrierback_(L,p) : cast_void(0)) - -#define luaC_barrierback(L,p,v) ( \ - iscollectable(v) ? luaC_objbarrierback(L, p, gcvalue(v)) : cast_void(0)) - -LUAI_FUNC void luaC_fix (lua_State *L, GCObject *o); -LUAI_FUNC void luaC_freeallobjects (lua_State *L); -LUAI_FUNC void luaC_step (lua_State *L); -LUAI_FUNC void luaC_runtilstate (lua_State *L, int state, int fast); -LUAI_FUNC void luaC_fullgc (lua_State *L, int isemergency); -LUAI_FUNC GCObject *luaC_newobj (lua_State *L, lu_byte tt, size_t sz); -LUAI_FUNC GCObject *luaC_newobjdt (lua_State *L, lu_byte tt, size_t sz, - size_t offset); -LUAI_FUNC void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v); -LUAI_FUNC void luaC_barrierback_ (lua_State *L, GCObject *o); -LUAI_FUNC void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt); -LUAI_FUNC void luaC_changemode (lua_State *L, int newmode); - - -#endif diff --git a/lib/lua/linit.c b/lib/lua/linit.c deleted file mode 100644 index 00d06f7..0000000 --- a/lib/lua/linit.c +++ /dev/null @@ -1,63 +0,0 @@ -/* -** $Id: linit.c $ -** Initialization of libraries for lua.c and other clients -** See Copyright Notice in lua.h -*/ - - -#define linit_c -#define LUA_LIB - - -#include "lprefix.h" - - -#include - -#include "lua.h" - -#include "lualib.h" -#include "lauxlib.h" -#include "llimits.h" - - -/* -** Standard Libraries. (Must be listed in the same ORDER of their -** respective constants LUA_K.) -*/ -static const luaL_Reg stdlibs[] = { - {LUA_GNAME, luaopen_base}, - {LUA_LOADLIBNAME, luaopen_package}, - {LUA_COLIBNAME, luaopen_coroutine}, - {LUA_DBLIBNAME, luaopen_debug}, - {LUA_IOLIBNAME, luaopen_io}, - {LUA_MATHLIBNAME, luaopen_math}, - {LUA_OSLIBNAME, luaopen_os}, - {LUA_STRLIBNAME, luaopen_string}, - {LUA_TABLIBNAME, luaopen_table}, - {LUA_UTF8LIBNAME, luaopen_utf8}, - {NULL, NULL} -}; - - -/* -** require and preload selected standard libraries -*/ -LUALIB_API void luaL_openselectedlibs (lua_State *L, int load, int preload) { - int mask; - const luaL_Reg *lib; - luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE); - for (lib = stdlibs, mask = 1; lib->name != NULL; lib++, mask <<= 1) { - if (load & mask) { /* selected? */ - luaL_requiref(L, lib->name, lib->func, 1); /* require library */ - lua_pop(L, 1); /* remove result from the stack */ - } - else if (preload & mask) { /* selected? */ - lua_pushcfunction(L, lib->func); - lua_setfield(L, -2, lib->name); /* add library to PRELOAD table */ - } - } - lua_assert((mask >> 1) == LUA_UTF8LIBK); - lua_pop(L, 1); /* remove PRELOAD table */ -} - diff --git a/lib/lua/liolib.c b/lib/lua/liolib.c deleted file mode 100644 index 57615e6..0000000 --- a/lib/lua/liolib.c +++ /dev/null @@ -1,841 +0,0 @@ -/* -** $Id: liolib.c $ -** Standard I/O (and system) library -** See Copyright Notice in lua.h -*/ - -#define liolib_c -#define LUA_LIB - -#include "lprefix.h" - - -#include -#include -#include -#include -#include -#include - -#include "lua.h" - -#include "lauxlib.h" -#include "lualib.h" -#include "llimits.h" - - -/* -** Change this macro to accept other modes for 'fopen' besides -** the standard ones. -*/ -#if !defined(l_checkmode) - -/* accepted extensions to 'mode' in 'fopen' */ -#if !defined(L_MODEEXT) -#define L_MODEEXT "b" -#endif - -/* Check whether 'mode' matches '[rwa]%+?[L_MODEEXT]*' */ -static int l_checkmode (const char *mode) { - return (*mode != '\0' && strchr("rwa", *(mode++)) != NULL && - (*mode != '+' || ((void)(++mode), 1)) && /* skip if char is '+' */ - (strspn(mode, L_MODEEXT) == strlen(mode))); /* check extensions */ -} - -#endif - -/* -** {====================================================== -** l_popen spawns a new process connected to the current -** one through the file streams. -** ======================================================= -*/ - -#if !defined(l_popen) /* { */ - -#if defined(LUA_USE_POSIX) /* { */ - -#define l_popen(L,c,m) (fflush(NULL), popen(c,m)) -#define l_pclose(L,file) (pclose(file)) - -#elif defined(LUA_USE_WINDOWS) /* }{ */ - -#define l_popen(L,c,m) (_popen(c,m)) -#define l_pclose(L,file) (_pclose(file)) - -#if !defined(l_checkmodep) -/* Windows accepts "[rw][bt]?" as valid modes */ -#define l_checkmodep(m) ((m[0] == 'r' || m[0] == 'w') && \ - (m[1] == '\0' || ((m[1] == 'b' || m[1] == 't') && m[2] == '\0'))) -#endif - -#else /* }{ */ - -/* ISO C definitions */ -#define l_popen(L,c,m) \ - ((void)c, (void)m, \ - luaL_error(L, "'popen' not supported"), \ - (FILE*)0) -#define l_pclose(L,file) ((void)L, (void)file, -1) - -#endif /* } */ - -#endif /* } */ - - -#if !defined(l_checkmodep) -/* By default, Lua accepts only "r" or "w" as valid modes */ -#define l_checkmodep(m) ((m[0] == 'r' || m[0] == 'w') && m[1] == '\0') -#endif - -/* }====================================================== */ - - -#if !defined(l_getc) /* { */ - -#if defined(LUA_USE_POSIX) -#define l_getc(f) getc_unlocked(f) -#define l_lockfile(f) flockfile(f) -#define l_unlockfile(f) funlockfile(f) -#else -#define l_getc(f) getc(f) -#define l_lockfile(f) ((void)0) -#define l_unlockfile(f) ((void)0) -#endif - -#endif /* } */ - - -/* -** {====================================================== -** l_fseek: configuration for longer offsets -** ======================================================= -*/ - -#if !defined(l_fseek) /* { */ - -#if defined(LUA_USE_POSIX) || defined(LUA_USE_OFF_T) /* { */ - -#include - -#define l_fseek(f,o,w) fseeko(f,o,w) -#define l_ftell(f) ftello(f) -#define l_seeknum off_t - -#elif defined(LUA_USE_WINDOWS) && !defined(_CRTIMP_TYPEINFO) \ - && defined(_MSC_VER) && (_MSC_VER >= 1400) /* }{ */ - -/* Windows (but not DDK) and Visual C++ 2005 or higher */ -#define l_fseek(f,o,w) _fseeki64(f,o,w) -#define l_ftell(f) _ftelli64(f) -#define l_seeknum __int64 - -#else /* }{ */ - -/* ISO C definitions */ -#define l_fseek(f,o,w) fseek(f,o,w) -#define l_ftell(f) ftell(f) -#define l_seeknum long - -#endif /* } */ - -#endif /* } */ - -/* }====================================================== */ - - - -#define IO_PREFIX "_IO_" -#define IOPREF_LEN (sizeof(IO_PREFIX)/sizeof(char) - 1) -#define IO_INPUT (IO_PREFIX "input") -#define IO_OUTPUT (IO_PREFIX "output") - - -typedef luaL_Stream LStream; - - -#define tolstream(L) ((LStream *)luaL_checkudata(L, 1, LUA_FILEHANDLE)) - -#define isclosed(p) ((p)->closef == NULL) - - -static int io_type (lua_State *L) { - LStream *p; - luaL_checkany(L, 1); - p = (LStream *)luaL_testudata(L, 1, LUA_FILEHANDLE); - if (p == NULL) - luaL_pushfail(L); /* not a file */ - else if (isclosed(p)) - lua_pushliteral(L, "closed file"); - else - lua_pushliteral(L, "file"); - return 1; -} - - -static int f_tostring (lua_State *L) { - LStream *p = tolstream(L); - if (isclosed(p)) - lua_pushliteral(L, "file (closed)"); - else - lua_pushfstring(L, "file (%p)", p->f); - return 1; -} - - -static FILE *tofile (lua_State *L) { - LStream *p = tolstream(L); - if (l_unlikely(isclosed(p))) - luaL_error(L, "attempt to use a closed file"); - lua_assert(p->f); - return p->f; -} - - -/* -** When creating file handles, always creates a 'closed' file handle -** before opening the actual file; so, if there is a memory error, the -** handle is in a consistent state. -*/ -static LStream *newprefile (lua_State *L) { - LStream *p = (LStream *)lua_newuserdatauv(L, sizeof(LStream), 0); - p->closef = NULL; /* mark file handle as 'closed' */ - luaL_setmetatable(L, LUA_FILEHANDLE); - return p; -} - - -/* -** Calls the 'close' function from a file handle. The 'volatile' avoids -** a bug in some versions of the Clang compiler (e.g., clang 3.0 for -** 32 bits). -*/ -static int aux_close (lua_State *L) { - LStream *p = tolstream(L); - volatile lua_CFunction cf = p->closef; - p->closef = NULL; /* mark stream as closed */ - return (*cf)(L); /* close it */ -} - - -static int f_close (lua_State *L) { - tofile(L); /* make sure argument is an open stream */ - return aux_close(L); -} - - -static int io_close (lua_State *L) { - if (lua_isnone(L, 1)) /* no argument? */ - lua_getfield(L, LUA_REGISTRYINDEX, IO_OUTPUT); /* use default output */ - return f_close(L); -} - - -static int f_gc (lua_State *L) { - LStream *p = tolstream(L); - if (!isclosed(p) && p->f != NULL) - aux_close(L); /* ignore closed and incompletely open files */ - return 0; -} - - -/* -** function to close regular files -*/ -static int io_fclose (lua_State *L) { - LStream *p = tolstream(L); - errno = 0; - return luaL_fileresult(L, (fclose(p->f) == 0), NULL); -} - - -static LStream *newfile (lua_State *L) { - LStream *p = newprefile(L); - p->f = NULL; - p->closef = &io_fclose; - return p; -} - - -static void opencheck (lua_State *L, const char *fname, const char *mode) { - LStream *p = newfile(L); - p->f = fopen(fname, mode); - if (l_unlikely(p->f == NULL)) - luaL_error(L, "cannot open file '%s' (%s)", fname, strerror(errno)); -} - - -static int io_open (lua_State *L) { - const char *filename = luaL_checkstring(L, 1); - const char *mode = luaL_optstring(L, 2, "r"); - LStream *p = newfile(L); - const char *md = mode; /* to traverse/check mode */ - luaL_argcheck(L, l_checkmode(md), 2, "invalid mode"); - errno = 0; - p->f = fopen(filename, mode); - return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1; -} - - -/* -** function to close 'popen' files -*/ -static int io_pclose (lua_State *L) { - LStream *p = tolstream(L); - errno = 0; - return luaL_execresult(L, l_pclose(L, p->f)); -} - - -static int io_popen (lua_State *L) { - const char *filename = luaL_checkstring(L, 1); - const char *mode = luaL_optstring(L, 2, "r"); - LStream *p = newprefile(L); - luaL_argcheck(L, l_checkmodep(mode), 2, "invalid mode"); - errno = 0; - p->f = l_popen(L, filename, mode); - p->closef = &io_pclose; - return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1; -} - - -static int io_tmpfile (lua_State *L) { - LStream *p = newfile(L); - errno = 0; - p->f = tmpfile(); - return (p->f == NULL) ? luaL_fileresult(L, 0, NULL) : 1; -} - - -static FILE *getiofile (lua_State *L, const char *findex) { - LStream *p; - lua_getfield(L, LUA_REGISTRYINDEX, findex); - p = (LStream *)lua_touserdata(L, -1); - if (l_unlikely(isclosed(p))) - luaL_error(L, "default %s file is closed", findex + IOPREF_LEN); - return p->f; -} - - -static int g_iofile (lua_State *L, const char *f, const char *mode) { - if (!lua_isnoneornil(L, 1)) { - const char *filename = lua_tostring(L, 1); - if (filename) - opencheck(L, filename, mode); - else { - tofile(L); /* check that it's a valid file handle */ - lua_pushvalue(L, 1); - } - lua_setfield(L, LUA_REGISTRYINDEX, f); - } - /* return current value */ - lua_getfield(L, LUA_REGISTRYINDEX, f); - return 1; -} - - -static int io_input (lua_State *L) { - return g_iofile(L, IO_INPUT, "r"); -} - - -static int io_output (lua_State *L) { - return g_iofile(L, IO_OUTPUT, "w"); -} - - -static int io_readline (lua_State *L); - - -/* -** maximum number of arguments to 'f:lines'/'io.lines' (it + 3 must fit -** in the limit for upvalues of a closure) -*/ -#define MAXARGLINE 250 - -/* -** Auxiliary function to create the iteration function for 'lines'. -** The iteration function is a closure over 'io_readline', with -** the following upvalues: -** 1) The file being read (first value in the stack) -** 2) the number of arguments to read -** 3) a boolean, true iff file has to be closed when finished ('toclose') -** *) a variable number of format arguments (rest of the stack) -*/ -static void aux_lines (lua_State *L, int toclose) { - int n = lua_gettop(L) - 1; /* number of arguments to read */ - luaL_argcheck(L, n <= MAXARGLINE, MAXARGLINE + 2, "too many arguments"); - lua_pushvalue(L, 1); /* file */ - lua_pushinteger(L, n); /* number of arguments to read */ - lua_pushboolean(L, toclose); /* close/not close file when finished */ - lua_rotate(L, 2, 3); /* move the three values to their positions */ - lua_pushcclosure(L, io_readline, 3 + n); -} - - -static int f_lines (lua_State *L) { - tofile(L); /* check that it's a valid file handle */ - aux_lines(L, 0); - return 1; -} - - -/* -** Return an iteration function for 'io.lines'. If file has to be -** closed, also returns the file itself as a second result (to be -** closed as the state at the exit of a generic for). -*/ -static int io_lines (lua_State *L) { - int toclose; - if (lua_isnone(L, 1)) lua_pushnil(L); /* at least one argument */ - if (lua_isnil(L, 1)) { /* no file name? */ - lua_getfield(L, LUA_REGISTRYINDEX, IO_INPUT); /* get default input */ - lua_replace(L, 1); /* put it at index 1 */ - tofile(L); /* check that it's a valid file handle */ - toclose = 0; /* do not close it after iteration */ - } - else { /* open a new file */ - const char *filename = luaL_checkstring(L, 1); - opencheck(L, filename, "r"); - lua_replace(L, 1); /* put file at index 1 */ - toclose = 1; /* close it after iteration */ - } - aux_lines(L, toclose); /* push iteration function */ - if (toclose) { - lua_pushnil(L); /* state */ - lua_pushnil(L); /* control */ - lua_pushvalue(L, 1); /* file is the to-be-closed variable (4th result) */ - return 4; - } - else - return 1; -} - - -/* -** {====================================================== -** READ -** ======================================================= -*/ - - -/* maximum length of a numeral */ -#if !defined (L_MAXLENNUM) -#define L_MAXLENNUM 200 -#endif - - -/* auxiliary structure used by 'read_number' */ -typedef struct { - FILE *f; /* file being read */ - int c; /* current character (look ahead) */ - int n; /* number of elements in buffer 'buff' */ - char buff[L_MAXLENNUM + 1]; /* +1 for ending '\0' */ -} RN; - - -/* -** Add current char to buffer (if not out of space) and read next one -*/ -static int nextc (RN *rn) { - if (l_unlikely(rn->n >= L_MAXLENNUM)) { /* buffer overflow? */ - rn->buff[0] = '\0'; /* invalidate result */ - return 0; /* fail */ - } - else { - rn->buff[rn->n++] = cast_char(rn->c); /* save current char */ - rn->c = l_getc(rn->f); /* read next one */ - return 1; - } -} - - -/* -** Accept current char if it is in 'set' (of size 2) -*/ -static int test2 (RN *rn, const char *set) { - if (rn->c == set[0] || rn->c == set[1]) - return nextc(rn); - else return 0; -} - - -/* -** Read a sequence of (hex)digits -*/ -static int readdigits (RN *rn, int hex) { - int count = 0; - while ((hex ? isxdigit(rn->c) : isdigit(rn->c)) && nextc(rn)) - count++; - return count; -} - - -/* -** Read a number: first reads a valid prefix of a numeral into a buffer. -** Then it calls 'lua_stringtonumber' to check whether the format is -** correct and to convert it to a Lua number. -*/ -static int read_number (lua_State *L, FILE *f) { - RN rn; - int count = 0; - int hex = 0; - char decp[2]; - rn.f = f; rn.n = 0; - decp[0] = lua_getlocaledecpoint(); /* get decimal point from locale */ - decp[1] = '.'; /* always accept a dot */ - l_lockfile(rn.f); - do { rn.c = l_getc(rn.f); } while (isspace(rn.c)); /* skip spaces */ - test2(&rn, "-+"); /* optional sign */ - if (test2(&rn, "00")) { - if (test2(&rn, "xX")) hex = 1; /* numeral is hexadecimal */ - else count = 1; /* count initial '0' as a valid digit */ - } - count += readdigits(&rn, hex); /* integral part */ - if (test2(&rn, decp)) /* decimal point? */ - count += readdigits(&rn, hex); /* fractional part */ - if (count > 0 && test2(&rn, (hex ? "pP" : "eE"))) { /* exponent mark? */ - test2(&rn, "-+"); /* exponent sign */ - readdigits(&rn, 0); /* exponent digits */ - } - ungetc(rn.c, rn.f); /* unread look-ahead char */ - l_unlockfile(rn.f); - rn.buff[rn.n] = '\0'; /* finish string */ - if (l_likely(lua_stringtonumber(L, rn.buff))) - return 1; /* ok, it is a valid number */ - else { /* invalid format */ - lua_pushnil(L); /* "result" to be removed */ - return 0; /* read fails */ - } -} - - -static int test_eof (lua_State *L, FILE *f) { - int c = getc(f); - ungetc(c, f); /* no-op when c == EOF */ - lua_pushliteral(L, ""); - return (c != EOF); -} - - -static int read_line (lua_State *L, FILE *f, int chop) { - luaL_Buffer b; - int c; - luaL_buffinit(L, &b); - do { /* may need to read several chunks to get whole line */ - char *buff = luaL_prepbuffer(&b); /* preallocate buffer space */ - unsigned i = 0; - l_lockfile(f); /* no memory errors can happen inside the lock */ - while (i < LUAL_BUFFERSIZE && (c = l_getc(f)) != EOF && c != '\n') - buff[i++] = cast_char(c); /* read up to end of line or buffer limit */ - l_unlockfile(f); - luaL_addsize(&b, i); - } while (c != EOF && c != '\n'); /* repeat until end of line */ - if (!chop && c == '\n') /* want a newline and have one? */ - luaL_addchar(&b, '\n'); /* add ending newline to result */ - luaL_pushresult(&b); /* close buffer */ - /* return ok if read something (either a newline or something else) */ - return (c == '\n' || lua_rawlen(L, -1) > 0); -} - - -static void read_all (lua_State *L, FILE *f) { - size_t nr; - luaL_Buffer b; - luaL_buffinit(L, &b); - do { /* read file in chunks of LUAL_BUFFERSIZE bytes */ - char *p = luaL_prepbuffer(&b); - nr = fread(p, sizeof(char), LUAL_BUFFERSIZE, f); - luaL_addsize(&b, nr); - } while (nr == LUAL_BUFFERSIZE); - luaL_pushresult(&b); /* close buffer */ -} - - -static int read_chars (lua_State *L, FILE *f, size_t n) { - size_t nr; /* number of chars actually read */ - char *p; - luaL_Buffer b; - luaL_buffinit(L, &b); - p = luaL_prepbuffsize(&b, n); /* prepare buffer to read whole block */ - nr = fread(p, sizeof(char), n, f); /* try to read 'n' chars */ - luaL_addsize(&b, nr); - luaL_pushresult(&b); /* close buffer */ - return (nr > 0); /* true iff read something */ -} - - -static int g_read (lua_State *L, FILE *f, int first) { - int nargs = lua_gettop(L) - 1; - int n, success; - clearerr(f); - errno = 0; - if (nargs == 0) { /* no arguments? */ - success = read_line(L, f, 1); - n = first + 1; /* to return 1 result */ - } - else { - /* ensure stack space for all results and for auxlib's buffer */ - luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments"); - success = 1; - for (n = first; nargs-- && success; n++) { - if (lua_type(L, n) == LUA_TNUMBER) { - size_t l = (size_t)luaL_checkinteger(L, n); - success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l); - } - else { - const char *p = luaL_checkstring(L, n); - if (*p == '*') p++; /* skip optional '*' (for compatibility) */ - switch (*p) { - case 'n': /* number */ - success = read_number(L, f); - break; - case 'l': /* line */ - success = read_line(L, f, 1); - break; - case 'L': /* line with end-of-line */ - success = read_line(L, f, 0); - break; - case 'a': /* file */ - read_all(L, f); /* read entire file */ - success = 1; /* always success */ - break; - default: - return luaL_argerror(L, n, "invalid format"); - } - } - } - } - if (ferror(f)) - return luaL_fileresult(L, 0, NULL); - if (!success) { - lua_pop(L, 1); /* remove last result */ - luaL_pushfail(L); /* push nil instead */ - } - return n - first; -} - - -static int io_read (lua_State *L) { - return g_read(L, getiofile(L, IO_INPUT), 1); -} - - -static int f_read (lua_State *L) { - return g_read(L, tofile(L), 2); -} - - -/* -** Iteration function for 'lines'. -*/ -static int io_readline (lua_State *L) { - LStream *p = (LStream *)lua_touserdata(L, lua_upvalueindex(1)); - int i; - int n = (int)lua_tointeger(L, lua_upvalueindex(2)); - if (isclosed(p)) /* file is already closed? */ - return luaL_error(L, "file is already closed"); - lua_settop(L , 1); - luaL_checkstack(L, n, "too many arguments"); - for (i = 1; i <= n; i++) /* push arguments to 'g_read' */ - lua_pushvalue(L, lua_upvalueindex(3 + i)); - n = g_read(L, p->f, 2); /* 'n' is number of results */ - lua_assert(n > 0); /* should return at least a nil */ - if (lua_toboolean(L, -n)) /* read at least one value? */ - return n; /* return them */ - else { /* first result is false: EOF or error */ - if (n > 1) { /* is there error information? */ - /* 2nd result is error message */ - return luaL_error(L, "%s", lua_tostring(L, -n + 1)); - } - if (lua_toboolean(L, lua_upvalueindex(3))) { /* generator created file? */ - lua_settop(L, 0); /* clear stack */ - lua_pushvalue(L, lua_upvalueindex(1)); /* push file at index 1 */ - aux_close(L); /* close it */ - } - return 0; - } -} - -/* }====================================================== */ - - -static int g_write (lua_State *L, FILE *f, int arg) { - int nargs = lua_gettop(L) - arg; - size_t totalbytes = 0; /* total number of bytes written */ - errno = 0; - for (; nargs--; arg++) { /* for each argument */ - char buff[LUA_N2SBUFFSZ]; - const char *s; - size_t numbytes; /* bytes written in one call to 'fwrite' */ - size_t len = lua_numbertocstring(L, arg, buff); /* try as a number */ - if (len > 0) { /* did conversion work (value was a number)? */ - s = buff; - len--; - } - else /* must be a string */ - s = luaL_checklstring(L, arg, &len); - numbytes = fwrite(s, sizeof(char), len, f); - totalbytes += numbytes; - if (numbytes < len) { /* write error? */ - int n = luaL_fileresult(L, 0, NULL); - lua_pushinteger(L, cast_st2S(totalbytes)); - return n + 1; /* return fail, error msg., error code, and counter */ - } - } - return 1; /* no errors; file handle already on stack top */ -} - - -static int io_write (lua_State *L) { - return g_write(L, getiofile(L, IO_OUTPUT), 1); -} - - -static int f_write (lua_State *L) { - FILE *f = tofile(L); - lua_pushvalue(L, 1); /* push file at the stack top (to be returned) */ - return g_write(L, f, 2); -} - - -static int f_seek (lua_State *L) { - static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END}; - static const char *const modenames[] = {"set", "cur", "end", NULL}; - FILE *f = tofile(L); - int op = luaL_checkoption(L, 2, "cur", modenames); - lua_Integer p3 = luaL_optinteger(L, 3, 0); - l_seeknum offset = (l_seeknum)p3; - luaL_argcheck(L, (lua_Integer)offset == p3, 3, - "not an integer in proper range"); - errno = 0; - op = l_fseek(f, offset, mode[op]); - if (l_unlikely(op)) - return luaL_fileresult(L, 0, NULL); /* error */ - else { - lua_pushinteger(L, (lua_Integer)l_ftell(f)); - return 1; - } -} - - -static int f_setvbuf (lua_State *L) { - static const int mode[] = {_IONBF, _IOFBF, _IOLBF}; - static const char *const modenames[] = {"no", "full", "line", NULL}; - FILE *f = tofile(L); - int op = luaL_checkoption(L, 2, NULL, modenames); - lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE); - int res; - errno = 0; - res = setvbuf(f, NULL, mode[op], (size_t)sz); - return luaL_fileresult(L, res == 0, NULL); -} - - -static int aux_flush (lua_State *L, FILE *f) { - errno = 0; - return luaL_fileresult(L, fflush(f) == 0, NULL); -} - - -static int f_flush (lua_State *L) { - return aux_flush(L, tofile(L)); -} - - -static int io_flush (lua_State *L) { - return aux_flush(L, getiofile(L, IO_OUTPUT)); -} - - -/* -** functions for 'io' library -*/ -static const luaL_Reg iolib[] = { - {"close", io_close}, - {"flush", io_flush}, - {"input", io_input}, - {"lines", io_lines}, - {"open", io_open}, - {"output", io_output}, - {"popen", io_popen}, - {"read", io_read}, - {"tmpfile", io_tmpfile}, - {"type", io_type}, - {"write", io_write}, - {NULL, NULL} -}; - - -/* -** methods for file handles -*/ -static const luaL_Reg meth[] = { - {"read", f_read}, - {"write", f_write}, - {"lines", f_lines}, - {"flush", f_flush}, - {"seek", f_seek}, - {"close", f_close}, - {"setvbuf", f_setvbuf}, - {NULL, NULL} -}; - - -/* -** metamethods for file handles -*/ -static const luaL_Reg metameth[] = { - {"__index", NULL}, /* placeholder */ - {"__gc", f_gc}, - {"__close", f_gc}, - {"__tostring", f_tostring}, - {NULL, NULL} -}; - - -static void createmeta (lua_State *L) { - luaL_newmetatable(L, LUA_FILEHANDLE); /* metatable for file handles */ - luaL_setfuncs(L, metameth, 0); /* add metamethods to new metatable */ - luaL_newlibtable(L, meth); /* create method table */ - luaL_setfuncs(L, meth, 0); /* add file methods to method table */ - lua_setfield(L, -2, "__index"); /* metatable.__index = method table */ - lua_pop(L, 1); /* pop metatable */ -} - - -/* -** function to (not) close the standard files stdin, stdout, and stderr -*/ -static int io_noclose (lua_State *L) { - LStream *p = tolstream(L); - p->closef = &io_noclose; /* keep file opened */ - luaL_pushfail(L); - lua_pushliteral(L, "cannot close standard file"); - return 2; -} - - -static void createstdfile (lua_State *L, FILE *f, const char *k, - const char *fname) { - LStream *p = newprefile(L); - p->f = f; - p->closef = &io_noclose; - if (k != NULL) { - lua_pushvalue(L, -1); - lua_setfield(L, LUA_REGISTRYINDEX, k); /* add file to registry */ - } - lua_setfield(L, -2, fname); /* add file to module */ -} - - -LUAMOD_API int luaopen_io (lua_State *L) { - luaL_newlib(L, iolib); /* new module */ - createmeta(L); - /* create (and set) default files */ - createstdfile(L, stdin, IO_INPUT, "stdin"); - createstdfile(L, stdout, IO_OUTPUT, "stdout"); - createstdfile(L, stderr, NULL, "stderr"); - return 1; -} - diff --git a/lib/lua/ljumptab.h b/lib/lua/ljumptab.h deleted file mode 100644 index 52fa6d7..0000000 --- a/lib/lua/ljumptab.h +++ /dev/null @@ -1,114 +0,0 @@ -/* -** $Id: ljumptab.h $ -** Jump Table for the Lua interpreter -** See Copyright Notice in lua.h -*/ - - -#undef vmdispatch -#undef vmcase -#undef vmbreak - -#define vmdispatch(x) goto *disptab[x]; - -#define vmcase(l) L_##l: - -#define vmbreak vmfetch(); vmdispatch(GET_OPCODE(i)); - - -static const void *const disptab[NUM_OPCODES] = { - -#if 0 -** you can update the following list with this command: -** -** sed -n '/^OP_/!d; s/OP_/\&\&L_OP_/ ; s/,.*/,/ ; s/\/.*// ; p' lopcodes.h -** -#endif - -&&L_OP_MOVE, -&&L_OP_LOADI, -&&L_OP_LOADF, -&&L_OP_LOADK, -&&L_OP_LOADKX, -&&L_OP_LOADFALSE, -&&L_OP_LFALSESKIP, -&&L_OP_LOADTRUE, -&&L_OP_LOADNIL, -&&L_OP_GETUPVAL, -&&L_OP_SETUPVAL, -&&L_OP_GETTABUP, -&&L_OP_GETTABLE, -&&L_OP_GETI, -&&L_OP_GETFIELD, -&&L_OP_SETTABUP, -&&L_OP_SETTABLE, -&&L_OP_SETI, -&&L_OP_SETFIELD, -&&L_OP_NEWTABLE, -&&L_OP_SELF, -&&L_OP_ADDI, -&&L_OP_ADDK, -&&L_OP_SUBK, -&&L_OP_MULK, -&&L_OP_MODK, -&&L_OP_POWK, -&&L_OP_DIVK, -&&L_OP_IDIVK, -&&L_OP_BANDK, -&&L_OP_BORK, -&&L_OP_BXORK, -&&L_OP_SHLI, -&&L_OP_SHRI, -&&L_OP_ADD, -&&L_OP_SUB, -&&L_OP_MUL, -&&L_OP_MOD, -&&L_OP_POW, -&&L_OP_DIV, -&&L_OP_IDIV, -&&L_OP_BAND, -&&L_OP_BOR, -&&L_OP_BXOR, -&&L_OP_SHL, -&&L_OP_SHR, -&&L_OP_MMBIN, -&&L_OP_MMBINI, -&&L_OP_MMBINK, -&&L_OP_UNM, -&&L_OP_BNOT, -&&L_OP_NOT, -&&L_OP_LEN, -&&L_OP_CONCAT, -&&L_OP_CLOSE, -&&L_OP_TBC, -&&L_OP_JMP, -&&L_OP_EQ, -&&L_OP_LT, -&&L_OP_LE, -&&L_OP_EQK, -&&L_OP_EQI, -&&L_OP_LTI, -&&L_OP_LEI, -&&L_OP_GTI, -&&L_OP_GEI, -&&L_OP_TEST, -&&L_OP_TESTSET, -&&L_OP_CALL, -&&L_OP_TAILCALL, -&&L_OP_RETURN, -&&L_OP_RETURN0, -&&L_OP_RETURN1, -&&L_OP_FORLOOP, -&&L_OP_FORPREP, -&&L_OP_TFORPREP, -&&L_OP_TFORCALL, -&&L_OP_TFORLOOP, -&&L_OP_SETLIST, -&&L_OP_CLOSURE, -&&L_OP_VARARG, -&&L_OP_GETVARG, -&&L_OP_ERRNNIL, -&&L_OP_VARARGPREP, -&&L_OP_EXTRAARG - -}; diff --git a/lib/lua/llex.c b/lib/lua/llex.c deleted file mode 100644 index 7cd9fca..0000000 --- a/lib/lua/llex.c +++ /dev/null @@ -1,604 +0,0 @@ -/* -** $Id: llex.c $ -** Lexical Analyzer -** See Copyright Notice in lua.h -*/ - -#define llex_c -#define LUA_CORE - -#include "lprefix.h" - - -#include -#include - -#include "lua.h" - -#include "lctype.h" -#include "ldebug.h" -#include "ldo.h" -#include "lgc.h" -#include "llex.h" -#include "lobject.h" -#include "lparser.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "lzio.h" - - - -#define next(ls) (ls->current = zgetc(ls->z)) - - -/* minimum size for string buffer */ -#if !defined(LUA_MINBUFFER) -#define LUA_MINBUFFER 32 -#endif - - -#define currIsNewline(ls) (ls->current == '\n' || ls->current == '\r') - - -/* ORDER RESERVED */ -static const char *const luaX_tokens [] = { - "and", "break", "do", "else", "elseif", - "end", "false", "for", "function", "global", "goto", "if", - "in", "local", "nil", "not", "or", "repeat", - "return", "then", "true", "until", "while", - "//", "..", "...", "==", ">=", "<=", "~=", - "<<", ">>", "::", "", - "", "", "", "" -}; - - -#define save_and_next(ls) (save(ls, ls->current), next(ls)) - - -static l_noret lexerror (LexState *ls, const char *msg, int token); - - -static void save (LexState *ls, int c) { - Mbuffer *b = ls->buff; - if (luaZ_bufflen(b) + 1 > luaZ_sizebuffer(b)) { - size_t newsize = luaZ_sizebuffer(b); /* get old size */; - if (newsize >= (MAX_SIZE/3 * 2)) /* larger than MAX_SIZE/1.5 ? */ - lexerror(ls, "lexical element too long", 0); - newsize += (newsize >> 1); /* new size is 1.5 times the old one */ - luaZ_resizebuffer(ls->L, b, newsize); - } - b->buffer[luaZ_bufflen(b)++] = cast_char(c); -} - - -void luaX_init (lua_State *L) { - int i; - TString *e = luaS_newliteral(L, LUA_ENV); /* create env name */ - luaC_fix(L, obj2gco(e)); /* never collect this name */ - for (i=0; iextra = cast_byte(i+1); /* reserved word */ - } -} - - -const char *luaX_token2str (LexState *ls, int token) { - if (token < FIRST_RESERVED) { /* single-byte symbols? */ - if (lisprint(token)) - return luaO_pushfstring(ls->L, "'%c'", token); - else /* control character */ - return luaO_pushfstring(ls->L, "'<\\%d>'", token); - } - else { - const char *s = luaX_tokens[token - FIRST_RESERVED]; - if (token < TK_EOS) /* fixed format (symbols and reserved words)? */ - return luaO_pushfstring(ls->L, "'%s'", s); - else /* names, strings, and numerals */ - return s; - } -} - - -static const char *txtToken (LexState *ls, int token) { - switch (token) { - case TK_NAME: case TK_STRING: - case TK_FLT: case TK_INT: - save(ls, '\0'); - return luaO_pushfstring(ls->L, "'%s'", luaZ_buffer(ls->buff)); - default: - return luaX_token2str(ls, token); - } -} - - -static l_noret lexerror (LexState *ls, const char *msg, int token) { - msg = luaG_addinfo(ls->L, msg, ls->source, ls->linenumber); - if (token) - luaO_pushfstring(ls->L, "%s near %s", msg, txtToken(ls, token)); - luaD_throw(ls->L, LUA_ERRSYNTAX); -} - - -l_noret luaX_syntaxerror (LexState *ls, const char *msg) { - lexerror(ls, msg, ls->t.token); -} - - -/* -** Anchors a string in scanner's table so that it will not be collected -** until the end of the compilation; by that time it should be anchored -** somewhere. It also internalizes long strings, ensuring there is only -** one copy of each unique string. -*/ -static TString *anchorstr (LexState *ls, TString *ts) { - lua_State *L = ls->L; - TValue oldts; - int tag = luaH_getstr(ls->h, ts, &oldts); - if (!tagisempty(tag)) /* string already present? */ - return tsvalue(&oldts); /* use stored value */ - else { /* create a new entry */ - TValue *stv = s2v(L->top.p++); /* reserve stack space for string */ - setsvalue(L, stv, ts); /* push (anchor) the string on the stack */ - luaH_set(L, ls->h, stv, stv); /* t[string] = string */ - /* table is not a metatable, so it does not need to invalidate cache */ - luaC_checkGC(L); - L->top.p--; /* remove string from stack */ - return ts; - } -} - - -/* -** Creates a new string and anchors it in scanner's table. -*/ -TString *luaX_newstring (LexState *ls, const char *str, size_t l) { - return anchorstr(ls, luaS_newlstr(ls->L, str, l)); -} - - -/* -** increment line number and skips newline sequence (any of -** \n, \r, \n\r, or \r\n) -*/ -static void inclinenumber (LexState *ls) { - int old = ls->current; - lua_assert(currIsNewline(ls)); - next(ls); /* skip '\n' or '\r' */ - if (currIsNewline(ls) && ls->current != old) - next(ls); /* skip '\n\r' or '\r\n' */ - if (++ls->linenumber >= INT_MAX) - lexerror(ls, "chunk has too many lines", 0); -} - - -void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source, - int firstchar) { - ls->t.token = 0; - ls->L = L; - ls->current = firstchar; - ls->lookahead.token = TK_EOS; /* no look-ahead token */ - ls->z = z; - ls->fs = NULL; - ls->linenumber = 1; - ls->lastline = 1; - ls->source = source; - /* all three strings here ("_ENV", "break", "global") were fixed, - so they cannot be collected */ - ls->envn = luaS_newliteral(L, LUA_ENV); /* get env string */ - ls->brkn = luaS_newliteral(L, "break"); /* get "break" string */ -#if LUA_COMPAT_GLOBAL - /* compatibility mode: "global" is not a reserved word */ - ls->glbn = luaS_newliteral(L, "global"); /* get "global" string */ - ls->glbn->extra = 0; /* mark it as not reserved */ -#endif - luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER); /* initialize buffer */ -} - - - -/* -** ======================================================= -** LEXICAL ANALYZER -** ======================================================= -*/ - - -static int check_next1 (LexState *ls, int c) { - if (ls->current == c) { - next(ls); - return 1; - } - else return 0; -} - - -/* -** Check whether current char is in set 'set' (with two chars) and -** saves it -*/ -static int check_next2 (LexState *ls, const char *set) { - lua_assert(set[2] == '\0'); - if (ls->current == set[0] || ls->current == set[1]) { - save_and_next(ls); - return 1; - } - else return 0; -} - - -/* LUA_NUMBER */ -/* -** This function is quite liberal in what it accepts, as 'luaO_str2num' -** will reject ill-formed numerals. Roughly, it accepts the following -** pattern: -** -** %d(%x|%.|([Ee][+-]?))* | 0[Xx](%x|%.|([Pp][+-]?))* -** -** The only tricky part is to accept [+-] only after a valid exponent -** mark, to avoid reading '3-4' or '0xe+1' as a single number. -** -** The caller might have already read an initial dot. -*/ -static int read_numeral (LexState *ls, SemInfo *seminfo) { - TValue obj; - const char *expo = "Ee"; - int first = ls->current; - lua_assert(lisdigit(ls->current)); - save_and_next(ls); - if (first == '0' && check_next2(ls, "xX")) /* hexadecimal? */ - expo = "Pp"; - for (;;) { - if (check_next2(ls, expo)) /* exponent mark? */ - check_next2(ls, "-+"); /* optional exponent sign */ - else if (lisxdigit(ls->current) || ls->current == '.') /* '%x|%.' */ - save_and_next(ls); - else break; - } - if (lislalpha(ls->current)) /* is numeral touching a letter? */ - save_and_next(ls); /* force an error */ - save(ls, '\0'); - if (luaO_str2num(luaZ_buffer(ls->buff), &obj) == 0) /* format error? */ - lexerror(ls, "malformed number", TK_FLT); - if (ttisinteger(&obj)) { - seminfo->i = ivalue(&obj); - return TK_INT; - } - else { - lua_assert(ttisfloat(&obj)); - seminfo->r = fltvalue(&obj); - return TK_FLT; - } -} - - -/* -** read a sequence '[=*[' or ']=*]', leaving the last bracket. If -** sequence is well formed, return its number of '='s + 2; otherwise, -** return 1 if it is a single bracket (no '='s and no 2nd bracket); -** otherwise (an unfinished '[==...') return 0. -*/ -static size_t skip_sep (LexState *ls) { - size_t count = 0; - int s = ls->current; - lua_assert(s == '[' || s == ']'); - save_and_next(ls); - while (ls->current == '=') { - save_and_next(ls); - count++; - } - return (ls->current == s) ? count + 2 - : (count == 0) ? 1 - : 0; -} - - -static void read_long_string (LexState *ls, SemInfo *seminfo, size_t sep) { - int line = ls->linenumber; /* initial line (for error message) */ - save_and_next(ls); /* skip 2nd '[' */ - if (currIsNewline(ls)) /* string starts with a newline? */ - inclinenumber(ls); /* skip it */ - for (;;) { - switch (ls->current) { - case EOZ: { /* error */ - const char *what = (seminfo ? "string" : "comment"); - const char *msg = luaO_pushfstring(ls->L, - "unfinished long %s (starting at line %d)", what, line); - lexerror(ls, msg, TK_EOS); - break; /* to avoid warnings */ - } - case ']': { - if (skip_sep(ls) == sep) { - save_and_next(ls); /* skip 2nd ']' */ - goto endloop; - } - break; - } - case '\n': case '\r': { - save(ls, '\n'); - inclinenumber(ls); - if (!seminfo) luaZ_resetbuffer(ls->buff); /* avoid wasting space */ - break; - } - default: { - if (seminfo) save_and_next(ls); - else next(ls); - } - } - } endloop: - if (seminfo) - seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + sep, - luaZ_bufflen(ls->buff) - 2 * sep); -} - - -static void esccheck (LexState *ls, int c, const char *msg) { - if (!c) { - if (ls->current != EOZ) - save_and_next(ls); /* add current to buffer for error message */ - lexerror(ls, msg, TK_STRING); - } -} - - -static int gethexa (LexState *ls) { - save_and_next(ls); - esccheck (ls, lisxdigit(ls->current), "hexadecimal digit expected"); - return luaO_hexavalue(ls->current); -} - - -static int readhexaesc (LexState *ls) { - int r = gethexa(ls); - r = (r << 4) + gethexa(ls); - luaZ_buffremove(ls->buff, 2); /* remove saved chars from buffer */ - return r; -} - - -/* -** When reading a UTF-8 escape sequence, save everything to the buffer -** for error reporting in case of errors; 'i' counts the number of -** saved characters, so that they can be removed if case of success. -*/ -static l_uint32 readutf8esc (LexState *ls) { - l_uint32 r; - int i = 4; /* number of chars to be removed: start with #"\u{X" */ - save_and_next(ls); /* skip 'u' */ - esccheck(ls, ls->current == '{', "missing '{'"); - r = cast_uint(gethexa(ls)); /* must have at least one digit */ - while (cast_void(save_and_next(ls)), lisxdigit(ls->current)) { - i++; - esccheck(ls, r <= (0x7FFFFFFFu >> 4), "UTF-8 value too large"); - r = (r << 4) + luaO_hexavalue(ls->current); - } - esccheck(ls, ls->current == '}', "missing '}'"); - next(ls); /* skip '}' */ - luaZ_buffremove(ls->buff, i); /* remove saved chars from buffer */ - return r; -} - - -static void utf8esc (LexState *ls) { - char buff[UTF8BUFFSZ]; - int n = luaO_utf8esc(buff, readutf8esc(ls)); - for (; n > 0; n--) /* add 'buff' to string */ - save(ls, buff[UTF8BUFFSZ - n]); -} - - -static int readdecesc (LexState *ls) { - int i; - int r = 0; /* result accumulator */ - for (i = 0; i < 3 && lisdigit(ls->current); i++) { /* read up to 3 digits */ - r = 10*r + ls->current - '0'; - save_and_next(ls); - } - esccheck(ls, r <= UCHAR_MAX, "decimal escape too large"); - luaZ_buffremove(ls->buff, i); /* remove read digits from buffer */ - return r; -} - - -static void read_string (LexState *ls, int del, SemInfo *seminfo) { - save_and_next(ls); /* keep delimiter (for error messages) */ - while (ls->current != del) { - switch (ls->current) { - case EOZ: - lexerror(ls, "unfinished string", TK_EOS); - break; /* to avoid warnings */ - case '\n': - case '\r': - lexerror(ls, "unfinished string", TK_STRING); - break; /* to avoid warnings */ - case '\\': { /* escape sequences */ - int c; /* final character to be saved */ - save_and_next(ls); /* keep '\\' for error messages */ - switch (ls->current) { - case 'a': c = '\a'; goto read_save; - case 'b': c = '\b'; goto read_save; - case 'f': c = '\f'; goto read_save; - case 'n': c = '\n'; goto read_save; - case 'r': c = '\r'; goto read_save; - case 't': c = '\t'; goto read_save; - case 'v': c = '\v'; goto read_save; - case 'x': c = readhexaesc(ls); goto read_save; - case 'u': utf8esc(ls); goto no_save; - case '\n': case '\r': - inclinenumber(ls); c = '\n'; goto only_save; - case '\\': case '\"': case '\'': - c = ls->current; goto read_save; - case EOZ: goto no_save; /* will raise an error next loop */ - case 'z': { /* zap following span of spaces */ - luaZ_buffremove(ls->buff, 1); /* remove '\\' */ - next(ls); /* skip the 'z' */ - while (lisspace(ls->current)) { - if (currIsNewline(ls)) inclinenumber(ls); - else next(ls); - } - goto no_save; - } - default: { - esccheck(ls, lisdigit(ls->current), "invalid escape sequence"); - c = readdecesc(ls); /* digital escape '\ddd' */ - goto only_save; - } - } - read_save: - next(ls); - /* go through */ - only_save: - luaZ_buffremove(ls->buff, 1); /* remove '\\' */ - save(ls, c); - /* go through */ - no_save: break; - } - default: - save_and_next(ls); - } - } - save_and_next(ls); /* skip delimiter */ - seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + 1, - luaZ_bufflen(ls->buff) - 2); -} - - -static int llex (LexState *ls, SemInfo *seminfo) { - luaZ_resetbuffer(ls->buff); - for (;;) { - switch (ls->current) { - case '\n': case '\r': { /* line breaks */ - inclinenumber(ls); - break; - } - case ' ': case '\f': case '\t': case '\v': { /* spaces */ - next(ls); - break; - } - case '-': { /* '-' or '--' (comment) */ - next(ls); - if (ls->current != '-') return '-'; - /* else is a comment */ - next(ls); - if (ls->current == '[') { /* long comment? */ - size_t sep = skip_sep(ls); - luaZ_resetbuffer(ls->buff); /* 'skip_sep' may dirty the buffer */ - if (sep >= 2) { - read_long_string(ls, NULL, sep); /* skip long comment */ - luaZ_resetbuffer(ls->buff); /* previous call may dirty the buff. */ - break; - } - } - /* else short comment */ - while (!currIsNewline(ls) && ls->current != EOZ) - next(ls); /* skip until end of line (or end of file) */ - break; - } - case '[': { /* long string or simply '[' */ - size_t sep = skip_sep(ls); - if (sep >= 2) { - read_long_string(ls, seminfo, sep); - return TK_STRING; - } - else if (sep == 0) /* '[=...' missing second bracket? */ - lexerror(ls, "invalid long string delimiter", TK_STRING); - return '['; - } - case '=': { - next(ls); - if (check_next1(ls, '=')) return TK_EQ; /* '==' */ - else return '='; - } - case '<': { - next(ls); - if (check_next1(ls, '=')) return TK_LE; /* '<=' */ - else if (check_next1(ls, '<')) return TK_SHL; /* '<<' */ - else return '<'; - } - case '>': { - next(ls); - if (check_next1(ls, '=')) return TK_GE; /* '>=' */ - else if (check_next1(ls, '>')) return TK_SHR; /* '>>' */ - else return '>'; - } - case '/': { - next(ls); - if (check_next1(ls, '/')) return TK_IDIV; /* '//' */ - else return '/'; - } - case '~': { - next(ls); - if (check_next1(ls, '=')) return TK_NE; /* '~=' */ - else return '~'; - } - case ':': { - next(ls); - if (check_next1(ls, ':')) return TK_DBCOLON; /* '::' */ - else return ':'; - } - case '"': case '\'': { /* short literal strings */ - read_string(ls, ls->current, seminfo); - return TK_STRING; - } - case '.': { /* '.', '..', '...', or number */ - save_and_next(ls); - if (check_next1(ls, '.')) { - if (check_next1(ls, '.')) - return TK_DOTS; /* '...' */ - else return TK_CONCAT; /* '..' */ - } - else if (!lisdigit(ls->current)) return '.'; - else return read_numeral(ls, seminfo); - } - case '0': case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': { - return read_numeral(ls, seminfo); - } - case EOZ: { - return TK_EOS; - } - default: { - if (lislalpha(ls->current)) { /* identifier or reserved word? */ - TString *ts; - do { - save_and_next(ls); - } while (lislalnum(ls->current)); - /* find or create string */ - ts = luaS_newlstr(ls->L, luaZ_buffer(ls->buff), - luaZ_bufflen(ls->buff)); - if (isreserved(ts)) /* reserved word? */ - return ts->extra - 1 + FIRST_RESERVED; - else { - seminfo->ts = anchorstr(ls, ts); - return TK_NAME; - } - } - else { /* single-char tokens ('+', '*', '%', '{', '}', ...) */ - int c = ls->current; - next(ls); - return c; - } - } - } - } -} - - -void luaX_next (LexState *ls) { - ls->lastline = ls->linenumber; - if (ls->lookahead.token != TK_EOS) { /* is there a look-ahead token? */ - ls->t = ls->lookahead; /* use this one */ - ls->lookahead.token = TK_EOS; /* and discharge it */ - } - else - ls->t.token = llex(ls, &ls->t.seminfo); /* read next token */ -} - - -int luaX_lookahead (LexState *ls) { - lua_assert(ls->lookahead.token == TK_EOS); - ls->lookahead.token = llex(ls, &ls->lookahead.seminfo); - return ls->lookahead.token; -} - diff --git a/lib/lua/llex.h b/lib/lua/llex.h deleted file mode 100644 index 37016e8..0000000 --- a/lib/lua/llex.h +++ /dev/null @@ -1,93 +0,0 @@ -/* -** $Id: llex.h $ -** Lexical Analyzer -** See Copyright Notice in lua.h -*/ - -#ifndef llex_h -#define llex_h - -#include - -#include "lobject.h" -#include "lzio.h" - - -/* -** Single-char tokens (terminal symbols) are represented by their own -** numeric code. Other tokens start at the following value. -*/ -#define FIRST_RESERVED (UCHAR_MAX + 1) - - -#if !defined(LUA_ENV) -#define LUA_ENV "_ENV" -#endif - - -/* -* WARNING: if you change the order of this enumeration, -* grep "ORDER RESERVED" -*/ -enum RESERVED { - /* terminal symbols denoted by reserved words */ - TK_AND = FIRST_RESERVED, TK_BREAK, - TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION, - TK_GLOBAL, TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, - TK_REPEAT, TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE, - /* other terminal symbols */ - TK_IDIV, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, - TK_SHL, TK_SHR, - TK_DBCOLON, TK_EOS, - TK_FLT, TK_INT, TK_NAME, TK_STRING -}; - -/* number of reserved words */ -#define NUM_RESERVED (cast_int(TK_WHILE-FIRST_RESERVED + 1)) - - -typedef union { - lua_Number r; - lua_Integer i; - TString *ts; -} SemInfo; /* semantics information */ - - -typedef struct Token { - int token; - SemInfo seminfo; -} Token; - - -/* state of the scanner plus state of the parser when shared by all - functions */ -typedef struct LexState { - int current; /* current character (charint) */ - int linenumber; /* input line counter */ - int lastline; /* line of last token 'consumed' */ - Token t; /* current token */ - Token lookahead; /* look ahead token */ - struct FuncState *fs; /* current function (parser) */ - struct lua_State *L; - ZIO *z; /* input stream */ - Mbuffer *buff; /* buffer for tokens */ - Table *h; /* to avoid collection/reuse strings */ - struct Dyndata *dyd; /* dynamic structures used by the parser */ - TString *source; /* current source name */ - TString *envn; /* environment variable name */ - TString *brkn; /* "break" name (used as a label) */ - TString *glbn; /* "global" name (when not a reserved word) */ -} LexState; - - -LUAI_FUNC void luaX_init (lua_State *L); -LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, - TString *source, int firstchar); -LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l); -LUAI_FUNC void luaX_next (LexState *ls); -LUAI_FUNC int luaX_lookahead (LexState *ls); -LUAI_FUNC l_noret luaX_syntaxerror (LexState *ls, const char *s); -LUAI_FUNC const char *luaX_token2str (LexState *ls, int token); - - -#endif diff --git a/lib/lua/llimits.h b/lib/lua/llimits.h deleted file mode 100644 index 3f03725..0000000 --- a/lib/lua/llimits.h +++ /dev/null @@ -1,357 +0,0 @@ -/* -** $Id: llimits.h $ -** Limits, basic types, and some other 'installation-dependent' definitions -** See Copyright Notice in lua.h -*/ - -#ifndef llimits_h -#define llimits_h - - -#include -#include - - -#include "lua.h" - - -#define l_numbits(t) cast_int(sizeof(t) * CHAR_BIT) - -/* -** 'l_mem' is a signed integer big enough to count the total memory -** used by Lua. (It is signed due to the use of debt in several -** computations.) 'lu_mem' is a corresponding unsigned type. Usually, -** 'ptrdiff_t' should work, but we use 'long' for 16-bit machines. -*/ -#if defined(LUAI_MEM) /* { external definitions? */ -typedef LUAI_MEM l_mem; -typedef LUAI_UMEM lu_mem; -#elif LUAI_IS32INT /* }{ */ -typedef ptrdiff_t l_mem; -typedef size_t lu_mem; -#else /* 16-bit ints */ /* }{ */ -typedef long l_mem; -typedef unsigned long lu_mem; -#endif /* } */ - -#define MAX_LMEM \ - cast(l_mem, (cast(lu_mem, 1) << (l_numbits(l_mem) - 1)) - 1) - - -/* chars used as small naturals (so that 'char' is reserved for characters) */ -typedef unsigned char lu_byte; -typedef signed char ls_byte; - - -/* Type for thread status/error codes */ -typedef lu_byte TStatus; - -/* The C API still uses 'int' for status/error codes */ -#define APIstatus(st) cast_int(st) - -/* maximum value for size_t */ -#define MAX_SIZET ((size_t)(~(size_t)0)) - -/* -** Maximum size for strings and userdata visible for Lua; should be -** representable as a lua_Integer and as a size_t. -*/ -#define MAX_SIZE (sizeof(size_t) < sizeof(lua_Integer) ? MAX_SIZET \ - : cast_sizet(LUA_MAXINTEGER)) - -/* -** test whether an unsigned value is a power of 2 (or zero) -*/ -#define ispow2(x) (((x) & ((x) - 1)) == 0) - - -/* number of chars of a literal string without the ending \0 */ -#define LL(x) (sizeof(x)/sizeof(char) - 1) - - -/* -** conversion of pointer to unsigned integer: this is for hashing only; -** there is no problem if the integer cannot hold the whole pointer -** value. (In strict ISO C this may cause undefined behavior, but no -** actual machine seems to bother.) -*/ -#if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \ - __STDC_VERSION__ >= 199901L -#include -#if defined(UINTPTR_MAX) /* even in C99 this type is optional */ -#define L_P2I uintptr_t -#else /* no 'intptr'? */ -#define L_P2I uintmax_t /* use the largest available integer */ -#endif -#else /* C89 option */ -#define L_P2I size_t -#endif - -#define point2uint(p) cast_uint((L_P2I)(p) & UINT_MAX) - - - -/* types of 'usual argument conversions' for lua_Number and lua_Integer */ -typedef LUAI_UACNUMBER l_uacNumber; -typedef LUAI_UACINT l_uacInt; - - -/* -** Internal assertions for in-house debugging -*/ -#if defined LUAI_ASSERT -#undef NDEBUG -#include -#define lua_assert(c) assert(c) -#define assert_code(c) c -#endif - -#if defined(lua_assert) -#else -#define lua_assert(c) ((void)0) -#define assert_code(c) ((void)0) -#endif - -#define check_exp(c,e) (lua_assert(c), (e)) -/* to avoid problems with conditions too long */ -#define lua_longassert(c) assert_code((c) ? (void)0 : lua_assert(0)) - - -/* macro to avoid warnings about unused variables */ -#if !defined(UNUSED) -#define UNUSED(x) ((void)(x)) -#endif - - -/* type casts (a macro highlights casts in the code) */ -#define cast(t, exp) ((t)(exp)) - -#define cast_void(i) cast(void, (i)) -#define cast_voidp(i) cast(void *, (i)) -#define cast_num(i) cast(lua_Number, (i)) -#define cast_int(i) cast(int, (i)) -#define cast_short(i) cast(short, (i)) -#define cast_uint(i) cast(unsigned int, (i)) -#define cast_byte(i) cast(lu_byte, (i)) -#define cast_uchar(i) cast(unsigned char, (i)) -#define cast_char(i) cast(char, (i)) -#define cast_charp(i) cast(char *, (i)) -#define cast_sizet(i) cast(size_t, (i)) -#define cast_Integer(i) cast(lua_Integer, (i)) -#define cast_Inst(i) cast(Instruction, (i)) - - -/* cast a signed lua_Integer to lua_Unsigned */ -#if !defined(l_castS2U) -#define l_castS2U(i) ((lua_Unsigned)(i)) -#endif - -/* -** cast a lua_Unsigned to a signed lua_Integer; this cast is -** not strict ISO C, but two-complement architectures should -** work fine. -*/ -#if !defined(l_castU2S) -#define l_castU2S(i) ((lua_Integer)(i)) -#endif - -/* -** cast a size_t to lua_Integer: These casts are always valid for -** sizes of Lua objects (see MAX_SIZE) -*/ -#define cast_st2S(sz) ((lua_Integer)(sz)) - -/* Cast a ptrdiff_t to size_t, when it is known that the minuend -** comes from the subtrahend (the base) -*/ -#define ct_diff2sz(df) ((size_t)(df)) - -/* ptrdiff_t to lua_Integer */ -#define ct_diff2S(df) cast_st2S(ct_diff2sz(df)) - -/* -** Special type equivalent to '(void*)' for functions (to suppress some -** warnings when converting function pointers) -*/ -typedef void (*voidf)(void); - -/* -** Macro to convert pointer-to-void* to pointer-to-function. This cast -** is undefined according to ISO C, but POSIX assumes that it works. -** (The '__extension__' in gnu compilers is only to avoid warnings.) -*/ -#if defined(__GNUC__) -#define cast_func(p) (__extension__ (voidf)(p)) -#else -#define cast_func(p) ((voidf)(p)) -#endif - - - -/* -** non-return type -*/ -#if !defined(l_noret) - -#if defined(__GNUC__) -#define l_noret void __attribute__((noreturn)) -#elif defined(_MSC_VER) && _MSC_VER >= 1200 -#define l_noret void __declspec(noreturn) -#else -#define l_noret void -#endif - -#endif - - -/* -** Inline functions -*/ -#if !defined(LUA_USE_C89) -#define l_inline inline -#elif defined(__GNUC__) -#define l_inline __inline__ -#else -#define l_inline /* empty */ -#endif - -#define l_sinline static l_inline - - -/* -** An unsigned with (at least) 4 bytes -*/ -#if LUAI_IS32INT -typedef unsigned int l_uint32; -#else -typedef unsigned long l_uint32; -#endif - - -/* -** The luai_num* macros define the primitive operations over numbers. -*/ - -/* floor division (defined as 'floor(a/b)') */ -#if !defined(luai_numidiv) -#define luai_numidiv(L,a,b) l_floor(luai_numdiv(L,a,b)) -#endif - -/* float division */ -#if !defined(luai_numdiv) -#define luai_numdiv(L,a,b) ((void)L, (a)/(b)) -#endif - -/* -** modulo: defined as 'a - floor(a/b)*b'; the direct computation -** using this definition has several problems with rounding errors, -** so it is better to use 'fmod'. 'fmod' gives the result of -** 'a - trunc(a/b)*b', and therefore must be corrected when -** 'trunc(a/b) ~= floor(a/b)'. That happens when the division has a -** non-integer negative result: non-integer result is equivalent to -** a non-zero remainder 'm'; negative result is equivalent to 'a' and -** 'b' with different signs, or 'm' and 'b' with different signs -** (as the result 'm' of 'fmod' has the same sign of 'a'). -*/ -#if !defined(luai_nummod) -#define luai_nummod(L,a,b,m) \ - { (void)L; (m) = l_mathop(fmod)(a,b); \ - if (((m) > 0) ? (b) < 0 : ((m) < 0 && (b) > 0)) (m) += (b); } -#endif - -/* exponentiation */ -#if !defined(luai_numpow) -#define luai_numpow(L,a,b) \ - ((void)L, (b == 2) ? (a)*(a) : l_mathop(pow)(a,b)) -#endif - -/* the others are quite standard operations */ -#if !defined(luai_numadd) -#define luai_numadd(L,a,b) ((void)L, (a)+(b)) -#define luai_numsub(L,a,b) ((void)L, (a)-(b)) -#define luai_nummul(L,a,b) ((void)L, (a)*(b)) -#define luai_numunm(L,a) ((void)L, -(a)) -#define luai_numeq(a,b) ((a)==(b)) -#define luai_numlt(a,b) ((a)<(b)) -#define luai_numle(a,b) ((a)<=(b)) -#define luai_numgt(a,b) ((a)>(b)) -#define luai_numge(a,b) ((a)>=(b)) -#define luai_numisnan(a) (!luai_numeq((a), (a))) -#endif - - - -/* -** lua_numbertointeger converts a float number with an integral value -** to an integer, or returns 0 if the float is not within the range of -** a lua_Integer. (The range comparisons are tricky because of -** rounding. The tests here assume a two-complement representation, -** where MININTEGER always has an exact representation as a float; -** MAXINTEGER may not have one, and therefore its conversion to float -** may have an ill-defined value.) -*/ -#define lua_numbertointeger(n,p) \ - ((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \ - (n) < -(LUA_NUMBER)(LUA_MININTEGER) && \ - (*(p) = (LUA_INTEGER)(n), 1)) - - - -/* -** LUAI_FUNC is a mark for all extern functions that are not to be -** exported to outside modules. -** LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables, -** none of which to be exported to outside modules (LUAI_DDEF for -** definitions and LUAI_DDEC for declarations). -** Elf and MACH/gcc (versions 3.2 and later) mark them as "hidden" to -** optimize access when Lua is compiled as a shared library. Not all elf -** targets support this attribute. Unfortunately, gcc does not offer -** a way to check whether the target offers that support, and those -** without support give a warning about it. To avoid these warnings, -** change to the default definition. -*/ -#if !defined(LUAI_FUNC) - -#if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \ - (defined(__ELF__) || defined(__MACH__)) -#define LUAI_FUNC __attribute__((visibility("internal"))) extern -#else -#define LUAI_FUNC extern -#endif - -#define LUAI_DDEC(dec) LUAI_FUNC dec -#define LUAI_DDEF /* empty */ - -#endif - - -/* Give these macros simpler names for internal use */ -#define l_likely(x) luai_likely(x) -#define l_unlikely(x) luai_unlikely(x) - -/* -** {================================================================== -** "Abstraction Layer" for basic report of messages and errors -** =================================================================== -*/ - -/* print a string */ -#if !defined(lua_writestring) -#define lua_writestring(s,l) fwrite((s), sizeof(char), (l), stdout) -#endif - -/* print a newline and flush the output */ -#if !defined(lua_writeline) -#define lua_writeline() (lua_writestring("\n", 1), fflush(stdout)) -#endif - -/* print an error message */ -#if !defined(lua_writestringerror) -#define lua_writestringerror(s,p) \ - (fprintf(stderr, (s), (p)), fflush(stderr)) -#endif - -/* }================================================================== */ - -#endif - diff --git a/lib/lua/lmathlib.c b/lib/lua/lmathlib.c deleted file mode 100644 index a6b13f9..0000000 --- a/lib/lua/lmathlib.c +++ /dev/null @@ -1,765 +0,0 @@ -/* -** $Id: lmathlib.c $ -** Standard mathematical library -** See Copyright Notice in lua.h -*/ - -#define lmathlib_c -#define LUA_LIB - -#include "lprefix.h" - - -#include -#include -#include -#include -#include - -#include "lua.h" - -#include "lauxlib.h" -#include "lualib.h" -#include "llimits.h" - - -#undef PI -#define PI (l_mathop(3.141592653589793238462643383279502884)) - - -static int math_abs (lua_State *L) { - if (lua_isinteger(L, 1)) { - lua_Integer n = lua_tointeger(L, 1); - if (n < 0) n = (lua_Integer)(0u - (lua_Unsigned)n); - lua_pushinteger(L, n); - } - else - lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1))); - return 1; -} - - -static int math_sin (lua_State *L) { - lua_pushnumber(L, l_mathop(sin)(luaL_checknumber(L, 1))); - return 1; -} - - -static int math_cos (lua_State *L) { - lua_pushnumber(L, l_mathop(cos)(luaL_checknumber(L, 1))); - return 1; -} - - -static int math_tan (lua_State *L) { - lua_pushnumber(L, l_mathop(tan)(luaL_checknumber(L, 1))); - return 1; -} - - -static int math_asin (lua_State *L) { - lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1))); - return 1; -} - - -static int math_acos (lua_State *L) { - lua_pushnumber(L, l_mathop(acos)(luaL_checknumber(L, 1))); - return 1; -} - - -static int math_atan (lua_State *L) { - lua_Number y = luaL_checknumber(L, 1); - lua_Number x = luaL_optnumber(L, 2, 1); - lua_pushnumber(L, l_mathop(atan2)(y, x)); - return 1; -} - - -static int math_toint (lua_State *L) { - int valid; - lua_Integer n = lua_tointegerx(L, 1, &valid); - if (l_likely(valid)) - lua_pushinteger(L, n); - else { - luaL_checkany(L, 1); - luaL_pushfail(L); /* value is not convertible to integer */ - } - return 1; -} - - -static void pushnumint (lua_State *L, lua_Number d) { - lua_Integer n; - if (lua_numbertointeger(d, &n)) /* does 'd' fit in an integer? */ - lua_pushinteger(L, n); /* result is integer */ - else - lua_pushnumber(L, d); /* result is float */ -} - - -static int math_floor (lua_State *L) { - if (lua_isinteger(L, 1)) - lua_settop(L, 1); /* integer is its own floor */ - else { - lua_Number d = l_mathop(floor)(luaL_checknumber(L, 1)); - pushnumint(L, d); - } - return 1; -} - - -static int math_ceil (lua_State *L) { - if (lua_isinteger(L, 1)) - lua_settop(L, 1); /* integer is its own ceiling */ - else { - lua_Number d = l_mathop(ceil)(luaL_checknumber(L, 1)); - pushnumint(L, d); - } - return 1; -} - - -static int math_fmod (lua_State *L) { - if (lua_isinteger(L, 1) && lua_isinteger(L, 2)) { - lua_Integer d = lua_tointeger(L, 2); - if ((lua_Unsigned)d + 1u <= 1u) { /* special cases: -1 or 0 */ - luaL_argcheck(L, d != 0, 2, "zero"); - lua_pushinteger(L, 0); /* avoid overflow with 0x80000... / -1 */ - } - else - lua_pushinteger(L, lua_tointeger(L, 1) % d); - } - else - lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1), - luaL_checknumber(L, 2))); - return 1; -} - - -/* -** next function does not use 'modf', avoiding problems with 'double*' -** (which is not compatible with 'float*') when lua_Number is not -** 'double'. -*/ -static int math_modf (lua_State *L) { - if (lua_isinteger(L ,1)) { - lua_settop(L, 1); /* number is its own integer part */ - lua_pushnumber(L, 0); /* no fractional part */ - } - else { - lua_Number n = luaL_checknumber(L, 1); - /* integer part (rounds toward zero) */ - lua_Number ip = (n < 0) ? l_mathop(ceil)(n) : l_mathop(floor)(n); - pushnumint(L, ip); - /* fractional part (test needed for inf/-inf) */ - lua_pushnumber(L, (n == ip) ? l_mathop(0.0) : (n - ip)); - } - return 2; -} - - -static int math_sqrt (lua_State *L) { - lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1))); - return 1; -} - - -static int math_ult (lua_State *L) { - lua_Integer a = luaL_checkinteger(L, 1); - lua_Integer b = luaL_checkinteger(L, 2); - lua_pushboolean(L, (lua_Unsigned)a < (lua_Unsigned)b); - return 1; -} - - -static int math_log (lua_State *L) { - lua_Number x = luaL_checknumber(L, 1); - lua_Number res; - if (lua_isnoneornil(L, 2)) - res = l_mathop(log)(x); - else { - lua_Number base = luaL_checknumber(L, 2); -#if !defined(LUA_USE_C89) - if (base == l_mathop(2.0)) - res = l_mathop(log2)(x); - else -#endif - if (base == l_mathop(10.0)) - res = l_mathop(log10)(x); - else - res = l_mathop(log)(x)/l_mathop(log)(base); - } - lua_pushnumber(L, res); - return 1; -} - - -static int math_exp (lua_State *L) { - lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1))); - return 1; -} - - -static int math_deg (lua_State *L) { - lua_pushnumber(L, luaL_checknumber(L, 1) * (l_mathop(180.0) / PI)); - return 1; -} - - -static int math_rad (lua_State *L) { - lua_pushnumber(L, luaL_checknumber(L, 1) * (PI / l_mathop(180.0))); - return 1; -} - - -static int math_frexp (lua_State *L) { - lua_Number x = luaL_checknumber(L, 1); - int ep; - lua_pushnumber(L, l_mathop(frexp)(x, &ep)); - lua_pushinteger(L, ep); - return 2; -} - - -static int math_ldexp (lua_State *L) { - lua_Number x = luaL_checknumber(L, 1); - int ep = (int)luaL_checkinteger(L, 2); - lua_pushnumber(L, l_mathop(ldexp)(x, ep)); - return 1; -} - - -static int math_min (lua_State *L) { - int n = lua_gettop(L); /* number of arguments */ - int imin = 1; /* index of current minimum value */ - int i; - luaL_argcheck(L, n >= 1, 1, "value expected"); - for (i = 2; i <= n; i++) { - if (lua_compare(L, i, imin, LUA_OPLT)) - imin = i; - } - lua_pushvalue(L, imin); - return 1; -} - - -static int math_max (lua_State *L) { - int n = lua_gettop(L); /* number of arguments */ - int imax = 1; /* index of current maximum value */ - int i; - luaL_argcheck(L, n >= 1, 1, "value expected"); - for (i = 2; i <= n; i++) { - if (lua_compare(L, imax, i, LUA_OPLT)) - imax = i; - } - lua_pushvalue(L, imax); - return 1; -} - - -static int math_type (lua_State *L) { - if (lua_type(L, 1) == LUA_TNUMBER) - lua_pushstring(L, (lua_isinteger(L, 1)) ? "integer" : "float"); - else { - luaL_checkany(L, 1); - luaL_pushfail(L); - } - return 1; -} - - - -/* -** {================================================================== -** Pseudo-Random Number Generator based on 'xoshiro256**'. -** =================================================================== -*/ - -/* -** This code uses lots of shifts. ISO C does not allow shifts greater -** than or equal to the width of the type being shifted, so some shifts -** are written in convoluted ways to match that restriction. For -** preprocessor tests, it assumes a width of 32 bits, so the maximum -** shift there is 31 bits. -*/ - - -/* number of binary digits in the mantissa of a float */ -#define FIGS l_floatatt(MANT_DIG) - -#if FIGS > 64 -/* there are only 64 random bits; use them all */ -#undef FIGS -#define FIGS 64 -#endif - - -/* -** LUA_RAND32 forces the use of 32-bit integers in the implementation -** of the PRN generator (mainly for testing). -*/ -#if !defined(LUA_RAND32) && !defined(Rand64) - -/* try to find an integer type with at least 64 bits */ - -#if ((ULONG_MAX >> 31) >> 31) >= 3 - -/* 'long' has at least 64 bits */ -#define Rand64 unsigned long -#define SRand64 long - -#elif !defined(LUA_USE_C89) && defined(LLONG_MAX) - -/* there is a 'long long' type (which must have at least 64 bits) */ -#define Rand64 unsigned long long -#define SRand64 long long - -#elif ((LUA_MAXUNSIGNED >> 31) >> 31) >= 3 - -/* 'lua_Unsigned' has at least 64 bits */ -#define Rand64 lua_Unsigned -#define SRand64 lua_Integer - -#endif - -#endif - - -#if defined(Rand64) /* { */ - -/* -** Standard implementation, using 64-bit integers. -** If 'Rand64' has more than 64 bits, the extra bits do not interfere -** with the 64 initial bits, except in a right shift. Moreover, the -** final result has to discard the extra bits. -*/ - -/* avoid using extra bits when needed */ -#define trim64(x) ((x) & 0xffffffffffffffffu) - - -/* rotate left 'x' by 'n' bits */ -static Rand64 rotl (Rand64 x, int n) { - return (x << n) | (trim64(x) >> (64 - n)); -} - -static Rand64 nextrand (Rand64 *state) { - Rand64 state0 = state[0]; - Rand64 state1 = state[1]; - Rand64 state2 = state[2] ^ state0; - Rand64 state3 = state[3] ^ state1; - Rand64 res = rotl(state1 * 5, 7) * 9; - state[0] = state0 ^ state3; - state[1] = state1 ^ state2; - state[2] = state2 ^ (state1 << 17); - state[3] = rotl(state3, 45); - return res; -} - - -/* -** Convert bits from a random integer into a float in the -** interval [0,1), getting the higher FIG bits from the -** random unsigned integer and converting that to a float. -** Some old Microsoft compilers cannot cast an unsigned long -** to a floating-point number, so we use a signed long as an -** intermediary. When lua_Number is float or double, the shift ensures -** that 'sx' is non negative; in that case, a good compiler will remove -** the correction. -*/ - -/* must throw out the extra (64 - FIGS) bits */ -#define shift64_FIG (64 - FIGS) - -/* 2^(-FIGS) == 2^-1 / 2^(FIGS-1) */ -#define scaleFIG (l_mathop(0.5) / ((Rand64)1 << (FIGS - 1))) - -static lua_Number I2d (Rand64 x) { - SRand64 sx = (SRand64)(trim64(x) >> shift64_FIG); - lua_Number res = (lua_Number)(sx) * scaleFIG; - if (sx < 0) - res += l_mathop(1.0); /* correct the two's complement if negative */ - lua_assert(0 <= res && res < 1); - return res; -} - -/* convert a 'Rand64' to a 'lua_Unsigned' */ -#define I2UInt(x) ((lua_Unsigned)trim64(x)) - -/* convert a 'lua_Unsigned' to a 'Rand64' */ -#define Int2I(x) ((Rand64)(x)) - - -#else /* no 'Rand64' }{ */ - -/* -** Use two 32-bit integers to represent a 64-bit quantity. -*/ -typedef struct Rand64 { - l_uint32 h; /* higher half */ - l_uint32 l; /* lower half */ -} Rand64; - - -/* -** If 'l_uint32' has more than 32 bits, the extra bits do not interfere -** with the 32 initial bits, except in a right shift and comparisons. -** Moreover, the final result has to discard the extra bits. -*/ - -/* avoid using extra bits when needed */ -#define trim32(x) ((x) & 0xffffffffu) - - -/* -** basic operations on 'Rand64' values -*/ - -/* build a new Rand64 value */ -static Rand64 packI (l_uint32 h, l_uint32 l) { - Rand64 result; - result.h = h; - result.l = l; - return result; -} - -/* return i << n */ -static Rand64 Ishl (Rand64 i, int n) { - lua_assert(n > 0 && n < 32); - return packI((i.h << n) | (trim32(i.l) >> (32 - n)), i.l << n); -} - -/* i1 ^= i2 */ -static void Ixor (Rand64 *i1, Rand64 i2) { - i1->h ^= i2.h; - i1->l ^= i2.l; -} - -/* return i1 + i2 */ -static Rand64 Iadd (Rand64 i1, Rand64 i2) { - Rand64 result = packI(i1.h + i2.h, i1.l + i2.l); - if (trim32(result.l) < trim32(i1.l)) /* carry? */ - result.h++; - return result; -} - -/* return i * 5 */ -static Rand64 times5 (Rand64 i) { - return Iadd(Ishl(i, 2), i); /* i * 5 == (i << 2) + i */ -} - -/* return i * 9 */ -static Rand64 times9 (Rand64 i) { - return Iadd(Ishl(i, 3), i); /* i * 9 == (i << 3) + i */ -} - -/* return 'i' rotated left 'n' bits */ -static Rand64 rotl (Rand64 i, int n) { - lua_assert(n > 0 && n < 32); - return packI((i.h << n) | (trim32(i.l) >> (32 - n)), - (trim32(i.h) >> (32 - n)) | (i.l << n)); -} - -/* for offsets larger than 32, rotate right by 64 - offset */ -static Rand64 rotl1 (Rand64 i, int n) { - lua_assert(n > 32 && n < 64); - n = 64 - n; - return packI((trim32(i.h) >> n) | (i.l << (32 - n)), - (i.h << (32 - n)) | (trim32(i.l) >> n)); -} - -/* -** implementation of 'xoshiro256**' algorithm on 'Rand64' values -*/ -static Rand64 nextrand (Rand64 *state) { - Rand64 res = times9(rotl(times5(state[1]), 7)); - Rand64 t = Ishl(state[1], 17); - Ixor(&state[2], state[0]); - Ixor(&state[3], state[1]); - Ixor(&state[1], state[2]); - Ixor(&state[0], state[3]); - Ixor(&state[2], t); - state[3] = rotl1(state[3], 45); - return res; -} - - -/* -** Converts a 'Rand64' into a float. -*/ - -/* an unsigned 1 with proper type */ -#define UONE ((l_uint32)1) - - -#if FIGS <= 32 - -/* 2^(-FIGS) */ -#define scaleFIG (l_mathop(0.5) / (UONE << (FIGS - 1))) - -/* -** get up to 32 bits from higher half, shifting right to -** throw out the extra bits. -*/ -static lua_Number I2d (Rand64 x) { - lua_Number h = (lua_Number)(trim32(x.h) >> (32 - FIGS)); - return h * scaleFIG; -} - -#else /* 32 < FIGS <= 64 */ - -/* 2^(-FIGS) = 1.0 / 2^30 / 2^3 / 2^(FIGS-33) */ -#define scaleFIG \ - (l_mathop(1.0) / (UONE << 30) / l_mathop(8.0) / (UONE << (FIGS - 33))) - -/* -** use FIGS - 32 bits from lower half, throwing out the other -** (32 - (FIGS - 32)) = (64 - FIGS) bits -*/ -#define shiftLOW (64 - FIGS) - -/* -** higher 32 bits go after those (FIGS - 32) bits: shiftHI = 2^(FIGS - 32) -*/ -#define shiftHI ((lua_Number)(UONE << (FIGS - 33)) * l_mathop(2.0)) - - -static lua_Number I2d (Rand64 x) { - lua_Number h = (lua_Number)trim32(x.h) * shiftHI; - lua_Number l = (lua_Number)(trim32(x.l) >> shiftLOW); - return (h + l) * scaleFIG; -} - -#endif - - -/* convert a 'Rand64' to a 'lua_Unsigned' */ -static lua_Unsigned I2UInt (Rand64 x) { - return (((lua_Unsigned)trim32(x.h) << 31) << 1) | (lua_Unsigned)trim32(x.l); -} - -/* convert a 'lua_Unsigned' to a 'Rand64' */ -static Rand64 Int2I (lua_Unsigned n) { - return packI((l_uint32)((n >> 31) >> 1), (l_uint32)n); -} - -#endif /* } */ - - -/* -** A state uses four 'Rand64' values. -*/ -typedef struct { - Rand64 s[4]; -} RanState; - - -/* -** Project the random integer 'ran' into the interval [0, n]. -** Because 'ran' has 2^B possible values, the projection can only be -** uniform when the size of the interval is a power of 2 (exact -** division). So, to get a uniform projection into [0, n], we -** first compute 'lim', the smallest Mersenne number not smaller than -** 'n'. We then project 'ran' into the interval [0, lim]. If the result -** is inside [0, n], we are done. Otherwise, we try with another 'ran', -** until we have a result inside the interval. -*/ -static lua_Unsigned project (lua_Unsigned ran, lua_Unsigned n, - RanState *state) { - lua_Unsigned lim = n; /* to compute the Mersenne number */ - int sh; /* how much to spread bits to the right in 'lim' */ - /* spread '1' bits in 'lim' until it becomes a Mersenne number */ - for (sh = 1; (lim & (lim + 1)) != 0; sh *= 2) - lim |= (lim >> sh); /* spread '1's to the right */ - while ((ran &= lim) > n) /* project 'ran' into [0..lim] and test */ - ran = I2UInt(nextrand(state->s)); /* not inside [0..n]? try again */ - return ran; -} - - -static int math_random (lua_State *L) { - lua_Integer low, up; - lua_Unsigned p; - RanState *state = (RanState *)lua_touserdata(L, lua_upvalueindex(1)); - Rand64 rv = nextrand(state->s); /* next pseudo-random value */ - switch (lua_gettop(L)) { /* check number of arguments */ - case 0: { /* no arguments */ - lua_pushnumber(L, I2d(rv)); /* float between 0 and 1 */ - return 1; - } - case 1: { /* only upper limit */ - low = 1; - up = luaL_checkinteger(L, 1); - if (up == 0) { /* single 0 as argument? */ - lua_pushinteger(L, l_castU2S(I2UInt(rv))); /* full random integer */ - return 1; - } - break; - } - case 2: { /* lower and upper limits */ - low = luaL_checkinteger(L, 1); - up = luaL_checkinteger(L, 2); - break; - } - default: return luaL_error(L, "wrong number of arguments"); - } - /* random integer in the interval [low, up] */ - luaL_argcheck(L, low <= up, 1, "interval is empty"); - /* project random integer into the interval [0, up - low] */ - p = project(I2UInt(rv), l_castS2U(up) - l_castS2U(low), state); - lua_pushinteger(L, l_castU2S(p + l_castS2U(low))); - return 1; -} - - -static void setseed (lua_State *L, Rand64 *state, - lua_Unsigned n1, lua_Unsigned n2) { - int i; - state[0] = Int2I(n1); - state[1] = Int2I(0xff); /* avoid a zero state */ - state[2] = Int2I(n2); - state[3] = Int2I(0); - for (i = 0; i < 16; i++) - nextrand(state); /* discard initial values to "spread" seed */ - lua_pushinteger(L, l_castU2S(n1)); - lua_pushinteger(L, l_castU2S(n2)); -} - - -static int math_randomseed (lua_State *L) { - RanState *state = (RanState *)lua_touserdata(L, lua_upvalueindex(1)); - lua_Unsigned n1, n2; - if (lua_isnone(L, 1)) { - n1 = luaL_makeseed(L); /* "random" seed */ - n2 = I2UInt(nextrand(state->s)); /* in case seed is not that random... */ - } - else { - n1 = l_castS2U(luaL_checkinteger(L, 1)); - n2 = l_castS2U(luaL_optinteger(L, 2, 0)); - } - setseed(L, state->s, n1, n2); - return 2; /* return seeds */ -} - - -static const luaL_Reg randfuncs[] = { - {"random", math_random}, - {"randomseed", math_randomseed}, - {NULL, NULL} -}; - - -/* -** Register the random functions and initialize their state. -*/ -static void setrandfunc (lua_State *L) { - RanState *state = (RanState *)lua_newuserdatauv(L, sizeof(RanState), 0); - setseed(L, state->s, luaL_makeseed(L), 0); /* initialize with random seed */ - lua_pop(L, 2); /* remove pushed seeds */ - luaL_setfuncs(L, randfuncs, 1); -} - -/* }================================================================== */ - - -/* -** {================================================================== -** Deprecated functions (for compatibility only) -** =================================================================== -*/ -#if defined(LUA_COMPAT_MATHLIB) - -static int math_cosh (lua_State *L) { - lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1))); - return 1; -} - -static int math_sinh (lua_State *L) { - lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1))); - return 1; -} - -static int math_tanh (lua_State *L) { - lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1))); - return 1; -} - -static int math_pow (lua_State *L) { - lua_Number x = luaL_checknumber(L, 1); - lua_Number y = luaL_checknumber(L, 2); - lua_pushnumber(L, l_mathop(pow)(x, y)); - return 1; -} - -static int math_log10 (lua_State *L) { - lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1))); - return 1; -} - -#endif -/* }================================================================== */ - - - -static const luaL_Reg mathlib[] = { - {"abs", math_abs}, - {"acos", math_acos}, - {"asin", math_asin}, - {"atan", math_atan}, - {"ceil", math_ceil}, - {"cos", math_cos}, - {"deg", math_deg}, - {"exp", math_exp}, - {"tointeger", math_toint}, - {"floor", math_floor}, - {"fmod", math_fmod}, - {"frexp", math_frexp}, - {"ult", math_ult}, - {"ldexp", math_ldexp}, - {"log", math_log}, - {"max", math_max}, - {"min", math_min}, - {"modf", math_modf}, - {"rad", math_rad}, - {"sin", math_sin}, - {"sqrt", math_sqrt}, - {"tan", math_tan}, - {"type", math_type}, -#if defined(LUA_COMPAT_MATHLIB) - {"atan2", math_atan}, - {"cosh", math_cosh}, - {"sinh", math_sinh}, - {"tanh", math_tanh}, - {"pow", math_pow}, - {"log10", math_log10}, -#endif - /* placeholders */ - {"random", NULL}, - {"randomseed", NULL}, - {"pi", NULL}, - {"huge", NULL}, - {"maxinteger", NULL}, - {"mininteger", NULL}, - {NULL, NULL} -}; - - -/* -** Open math library -*/ -LUAMOD_API int luaopen_math (lua_State *L) { - luaL_newlib(L, mathlib); - lua_pushnumber(L, PI); - lua_setfield(L, -2, "pi"); - lua_pushnumber(L, (lua_Number)HUGE_VAL); - lua_setfield(L, -2, "huge"); - lua_pushinteger(L, LUA_MAXINTEGER); - lua_setfield(L, -2, "maxinteger"); - lua_pushinteger(L, LUA_MININTEGER); - lua_setfield(L, -2, "mininteger"); - setrandfunc(L); - return 1; -} - diff --git a/lib/lua/lmem.c b/lib/lua/lmem.c deleted file mode 100644 index de8503d..0000000 --- a/lib/lua/lmem.c +++ /dev/null @@ -1,215 +0,0 @@ -/* -** $Id: lmem.c $ -** Interface to Memory Manager -** See Copyright Notice in lua.h -*/ - -#define lmem_c -#define LUA_CORE - -#include "lprefix.h" - - -#include - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lgc.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" - - - -/* -** About the realloc function: -** void *frealloc (void *ud, void *ptr, size_t osize, size_t nsize); -** ('osize' is the old size, 'nsize' is the new size) -** -** - frealloc(ud, p, x, 0) frees the block 'p' and returns NULL. -** Particularly, frealloc(ud, NULL, 0, 0) does nothing, -** which is equivalent to free(NULL) in ISO C. -** -** - frealloc(ud, NULL, x, s) creates a new block of size 's' -** (no matter 'x'). Returns NULL if it cannot create the new block. -** -** - otherwise, frealloc(ud, b, x, y) reallocates the block 'b' from -** size 'x' to size 'y'. Returns NULL if it cannot reallocate the -** block to the new size. -*/ - - -/* -** Macro to call the allocation function. -*/ -#define callfrealloc(g,block,os,ns) ((*g->frealloc)(g->ud, block, os, ns)) - - -/* -** When an allocation fails, it will try again after an emergency -** collection, except when it cannot run a collection. The GC should -** not be called while the state is not fully built, as the collector -** is not yet fully initialized. Also, it should not be called when -** 'gcstopem' is true, because then the interpreter is in the middle of -** a collection step. -*/ -#define cantryagain(g) (completestate(g) && !g->gcstopem) - - - - -#if defined(EMERGENCYGCTESTS) -/* -** First allocation will fail except when freeing a block (frees never -** fail) and when it cannot try again; this fail will trigger 'tryagain' -** and a full GC cycle at every allocation. -*/ -static void *firsttry (global_State *g, void *block, size_t os, size_t ns) { - if (ns > 0 && cantryagain(g)) - return NULL; /* fail */ - else /* normal allocation */ - return callfrealloc(g, block, os, ns); -} -#else -#define firsttry(g,block,os,ns) callfrealloc(g, block, os, ns) -#endif - - - - - -/* -** {================================================================== -** Functions to allocate/deallocate arrays for the Parser -** =================================================================== -*/ - -/* -** Minimum size for arrays during parsing, to avoid overhead of -** reallocating to size 1, then 2, and then 4. All these arrays -** will be reallocated to exact sizes or erased when parsing ends. -*/ -#define MINSIZEARRAY 4 - - -void *luaM_growaux_ (lua_State *L, void *block, int nelems, int *psize, - unsigned size_elems, int limit, const char *what) { - void *newblock; - int size = *psize; - if (nelems + 1 <= size) /* does one extra element still fit? */ - return block; /* nothing to be done */ - if (size >= limit / 2) { /* cannot double it? */ - if (l_unlikely(size >= limit)) /* cannot grow even a little? */ - luaG_runerror(L, "too many %s (limit is %d)", what, limit); - size = limit; /* still have at least one free place */ - } - else { - size *= 2; - if (size < MINSIZEARRAY) - size = MINSIZEARRAY; /* minimum size */ - } - lua_assert(nelems + 1 <= size && size <= limit); - /* 'limit' ensures that multiplication will not overflow */ - newblock = luaM_saferealloc_(L, block, cast_sizet(*psize) * size_elems, - cast_sizet(size) * size_elems); - *psize = size; /* update only when everything else is OK */ - return newblock; -} - - -/* -** In prototypes, the size of the array is also its number of -** elements (to save memory). So, if it cannot shrink an array -** to its number of elements, the only option is to raise an -** error. -*/ -void *luaM_shrinkvector_ (lua_State *L, void *block, int *size, - int final_n, unsigned size_elem) { - void *newblock; - size_t oldsize = cast_sizet(*size) * size_elem; - size_t newsize = cast_sizet(final_n) * size_elem; - lua_assert(newsize <= oldsize); - newblock = luaM_saferealloc_(L, block, oldsize, newsize); - *size = final_n; - return newblock; -} - -/* }================================================================== */ - - -l_noret luaM_toobig (lua_State *L) { - luaG_runerror(L, "memory allocation error: block too big"); -} - - -/* -** Free memory -*/ -void luaM_free_ (lua_State *L, void *block, size_t osize) { - global_State *g = G(L); - lua_assert((osize == 0) == (block == NULL)); - callfrealloc(g, block, osize, 0); - g->GCdebt += cast(l_mem, osize); -} - - -/* -** In case of allocation fail, this function will do an emergency -** collection to free some memory and then try the allocation again. -*/ -static void *tryagain (lua_State *L, void *block, - size_t osize, size_t nsize) { - global_State *g = G(L); - if (cantryagain(g)) { - luaC_fullgc(L, 1); /* try to free some memory... */ - return callfrealloc(g, block, osize, nsize); /* try again */ - } - else return NULL; /* cannot run an emergency collection */ -} - - -/* -** Generic allocation routine. -*/ -void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) { - void *newblock; - global_State *g = G(L); - lua_assert((osize == 0) == (block == NULL)); - newblock = firsttry(g, block, osize, nsize); - if (l_unlikely(newblock == NULL && nsize > 0)) { - newblock = tryagain(L, block, osize, nsize); - if (newblock == NULL) /* still no memory? */ - return NULL; /* do not update 'GCdebt' */ - } - lua_assert((nsize == 0) == (newblock == NULL)); - g->GCdebt -= cast(l_mem, nsize) - cast(l_mem, osize); - return newblock; -} - - -void *luaM_saferealloc_ (lua_State *L, void *block, size_t osize, - size_t nsize) { - void *newblock = luaM_realloc_(L, block, osize, nsize); - if (l_unlikely(newblock == NULL && nsize > 0)) /* allocation failed? */ - luaM_error(L); - return newblock; -} - - -void *luaM_malloc_ (lua_State *L, size_t size, int tag) { - if (size == 0) - return NULL; /* that's all */ - else { - global_State *g = G(L); - void *newblock = firsttry(g, NULL, cast_sizet(tag), size); - if (l_unlikely(newblock == NULL)) { - newblock = tryagain(L, NULL, cast_sizet(tag), size); - if (newblock == NULL) - luaM_error(L); - } - g->GCdebt -= cast(l_mem, size); - return newblock; - } -} diff --git a/lib/lua/lmem.h b/lib/lua/lmem.h deleted file mode 100644 index dc714fb..0000000 --- a/lib/lua/lmem.h +++ /dev/null @@ -1,96 +0,0 @@ -/* -** $Id: lmem.h $ -** Interface to Memory Manager -** See Copyright Notice in lua.h -*/ - -#ifndef lmem_h -#define lmem_h - - -#include - -#include "llimits.h" -#include "lua.h" - - -#define luaM_error(L) luaD_throw(L, LUA_ERRMEM) - - -/* -** This macro tests whether it is safe to multiply 'n' by the size of -** type 't' without overflows. Because 'e' is always constant, it avoids -** the runtime division MAX_SIZET/(e). -** (The macro is somewhat complex to avoid warnings: The 'sizeof' -** comparison avoids a runtime comparison when overflow cannot occur. -** The compiler should be able to optimize the real test by itself, but -** when it does it, it may give a warning about "comparison is always -** false due to limited range of data type"; the +1 tricks the compiler, -** avoiding this warning but also this optimization.) -*/ -#define luaM_testsize(n,e) \ - (sizeof(n) >= sizeof(size_t) && cast_sizet((n)) + 1 > MAX_SIZET/(e)) - -#define luaM_checksize(L,n,e) \ - (luaM_testsize(n,e) ? luaM_toobig(L) : cast_void(0)) - - -/* -** Computes the minimum between 'n' and 'MAX_SIZET/sizeof(t)', so that -** the result is not larger than 'n' and cannot overflow a 'size_t' -** when multiplied by the size of type 't'. (Assumes that 'n' is an -** 'int' and that 'int' is not larger than 'size_t'.) -*/ -#define luaM_limitN(n,t) \ - ((cast_sizet(n) <= MAX_SIZET/sizeof(t)) ? (n) : \ - cast_int((MAX_SIZET/sizeof(t)))) - - -/* -** Arrays of chars do not need any test -*/ -#define luaM_reallocvchar(L,b,on,n) \ - cast_charp(luaM_saferealloc_(L, (b), (on)*sizeof(char), (n)*sizeof(char))) - -#define luaM_freemem(L, b, s) luaM_free_(L, (b), (s)) -#define luaM_free(L, b) luaM_free_(L, (b), sizeof(*(b))) -#define luaM_freearray(L, b, n) luaM_free_(L, (b), (n)*sizeof(*(b))) - -#define luaM_new(L,t) cast(t*, luaM_malloc_(L, sizeof(t), 0)) -#define luaM_newvector(L,n,t) \ - cast(t*, luaM_malloc_(L, cast_sizet(n)*sizeof(t), 0)) -#define luaM_newvectorchecked(L,n,t) \ - (luaM_checksize(L,n,sizeof(t)), luaM_newvector(L,n,t)) - -#define luaM_newobject(L,tag,s) luaM_malloc_(L, (s), tag) - -#define luaM_newblock(L, size) luaM_newvector(L, size, char) - -#define luaM_growvector(L,v,nelems,size,t,limit,e) \ - ((v)=cast(t *, luaM_growaux_(L,v,nelems,&(size),sizeof(t), \ - luaM_limitN(limit,t),e))) - -#define luaM_reallocvector(L, v,oldn,n,t) \ - (cast(t *, luaM_realloc_(L, v, cast_sizet(oldn) * sizeof(t), \ - cast_sizet(n) * sizeof(t)))) - -#define luaM_shrinkvector(L,v,size,fs,t) \ - ((v)=cast(t *, luaM_shrinkvector_(L, v, &(size), fs, sizeof(t)))) - -LUAI_FUNC l_noret luaM_toobig (lua_State *L); - -/* not to be called directly */ -LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize, - size_t size); -LUAI_FUNC void *luaM_saferealloc_ (lua_State *L, void *block, size_t oldsize, - size_t size); -LUAI_FUNC void luaM_free_ (lua_State *L, void *block, size_t osize); -LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int nelems, - int *size, unsigned size_elem, int limit, - const char *what); -LUAI_FUNC void *luaM_shrinkvector_ (lua_State *L, void *block, int *nelem, - int final_n, unsigned size_elem); -LUAI_FUNC void *luaM_malloc_ (lua_State *L, size_t size, int tag); - -#endif - diff --git a/lib/lua/loadlib.c b/lib/lua/loadlib.c deleted file mode 100644 index ef09c9a..0000000 --- a/lib/lua/loadlib.c +++ /dev/null @@ -1,748 +0,0 @@ -/* -** $Id: loadlib.c $ -** Dynamic library loader for Lua -** See Copyright Notice in lua.h -** -** This module contains an implementation of loadlib for Unix systems -** that have dlfcn, an implementation for Windows, and a stub for other -** systems. -*/ - -#define loadlib_c -#define LUA_LIB - -#include "lprefix.h" - - -#include -#include -#include - -#include "lua.h" - -#include "lauxlib.h" -#include "lualib.h" -#include "llimits.h" - - -/* -** LUA_CSUBSEP is the character that replaces dots in submodule names -** when searching for a C loader. -** LUA_LSUBSEP is the character that replaces dots in submodule names -** when searching for a Lua loader. -*/ -#if !defined(LUA_CSUBSEP) -#define LUA_CSUBSEP LUA_DIRSEP -#endif - -#if !defined(LUA_LSUBSEP) -#define LUA_LSUBSEP LUA_DIRSEP -#endif - - -/* prefix for open functions in C libraries */ -#define LUA_POF "luaopen_" - -/* separator for open functions in C libraries */ -#define LUA_OFSEP "_" - - -/* -** key for table in the registry that keeps handles -** for all loaded C libraries -*/ -static const char *const CLIBS = "_CLIBS"; - -#define LIB_FAIL "open" - - -#define setprogdir(L) ((void)0) - - -/* cast void* to a Lua function */ -#define cast_Lfunc(p) cast(lua_CFunction, cast_func(p)) - - -/* -** system-dependent functions -*/ - -/* -** unload library 'lib' -*/ -static void lsys_unloadlib (void *lib); - -/* -** load C library in file 'path'. If 'seeglb', load with all names in -** the library global. -** Returns the library; in case of error, returns NULL plus an -** error string in the stack. -*/ -static void *lsys_load (lua_State *L, const char *path, int seeglb); - -/* -** Try to find a function named 'sym' in library 'lib'. -** Returns the function; in case of error, returns NULL plus an -** error string in the stack. -*/ -static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym); - - - - -#if defined(LUA_USE_DLOPEN) /* { */ -/* -** {======================================================================== -** This is an implementation of loadlib based on the dlfcn interface, -** which is available in all POSIX systems. -** ========================================================================= -*/ - -#include - - -static void lsys_unloadlib (void *lib) { - dlclose(lib); -} - - -static void *lsys_load (lua_State *L, const char *path, int seeglb) { - void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : RTLD_LOCAL)); - if (l_unlikely(lib == NULL)) - lua_pushstring(L, dlerror()); - return lib; -} - - -static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) { - lua_CFunction f = cast_Lfunc(dlsym(lib, sym)); - if (l_unlikely(f == NULL)) - lua_pushstring(L, dlerror()); - return f; -} - -/* }====================================================== */ - - - -#elif defined(LUA_DL_DLL) /* }{ */ -/* -** {====================================================================== -** This is an implementation of loadlib for Windows using native functions. -** ======================================================================= -*/ - -#include - - -/* -** optional flags for LoadLibraryEx -*/ -#if !defined(LUA_LLE_FLAGS) -#define LUA_LLE_FLAGS 0 -#endif - - -#undef setprogdir - - -/* -** Replace in the path (on the top of the stack) any occurrence -** of LUA_EXEC_DIR with the executable's path. -*/ -static void setprogdir (lua_State *L) { - char buff[MAX_PATH + 1]; - char *lb; - DWORD nsize = sizeof(buff)/sizeof(char); - DWORD n = GetModuleFileNameA(NULL, buff, nsize); /* get exec. name */ - if (n == 0 || n == nsize || (lb = strrchr(buff, '\\')) == NULL) - luaL_error(L, "unable to get ModuleFileName"); - else { - *lb = '\0'; /* cut name on the last '\\' to get the path */ - luaL_gsub(L, lua_tostring(L, -1), LUA_EXEC_DIR, buff); - lua_remove(L, -2); /* remove original string */ - } -} - - - - -static void pusherror (lua_State *L) { - int error = GetLastError(); - char buffer[128]; - if (FormatMessageA(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM, - NULL, error, 0, buffer, sizeof(buffer)/sizeof(char), NULL)) - lua_pushstring(L, buffer); - else - lua_pushfstring(L, "system error %d\n", error); -} - -static void lsys_unloadlib (void *lib) { - FreeLibrary((HMODULE)lib); -} - - -static void *lsys_load (lua_State *L, const char *path, int seeglb) { - HMODULE lib = LoadLibraryExA(path, NULL, LUA_LLE_FLAGS); - (void)(seeglb); /* not used: symbols are 'global' by default */ - if (lib == NULL) pusherror(L); - return lib; -} - - -static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) { - lua_CFunction f = cast_Lfunc(GetProcAddress((HMODULE)lib, sym)); - if (f == NULL) pusherror(L); - return f; -} - -/* }====================================================== */ - - -#else /* }{ */ -/* -** {====================================================== -** Fallback for other systems -** ======================================================= -*/ - -#undef LIB_FAIL -#define LIB_FAIL "absent" - - -#define DLMSG "dynamic libraries not enabled; check your Lua installation" - - -static void lsys_unloadlib (void *lib) { - (void)(lib); /* not used */ -} - - -static void *lsys_load (lua_State *L, const char *path, int seeglb) { - (void)(path); (void)(seeglb); /* not used */ - lua_pushliteral(L, DLMSG); - return NULL; -} - - -static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) { - (void)(lib); (void)(sym); /* not used */ - lua_pushliteral(L, DLMSG); - return NULL; -} - -/* }====================================================== */ -#endif /* } */ - - -/* -** {================================================================== -** Set Paths -** =================================================================== -*/ - -/* -** LUA_PATH_VAR and LUA_CPATH_VAR are the names of the environment -** variables that Lua check to set its paths. -*/ -#if !defined(LUA_PATH_VAR) -#define LUA_PATH_VAR "LUA_PATH" -#endif - -#if !defined(LUA_CPATH_VAR) -#define LUA_CPATH_VAR "LUA_CPATH" -#endif - - - -/* -** return registry.LUA_NOENV as a boolean -*/ -static int noenv (lua_State *L) { - int b; - lua_getfield(L, LUA_REGISTRYINDEX, "LUA_NOENV"); - b = lua_toboolean(L, -1); - lua_pop(L, 1); /* remove value */ - return b; -} - - -/* -** Set a path. (If using the default path, assume it is a string -** literal in C and create it as an external string.) -*/ -static void setpath (lua_State *L, const char *fieldname, - const char *envname, - const char *dft) { - const char *dftmark; - const char *nver = lua_pushfstring(L, "%s%s", envname, LUA_VERSUFFIX); - const char *path = getenv(nver); /* try versioned name */ - if (path == NULL) /* no versioned environment variable? */ - path = getenv(envname); /* try unversioned name */ - if (path == NULL || noenv(L)) /* no environment variable? */ - lua_pushexternalstring(L, dft, strlen(dft), NULL, NULL); /* use default */ - else if ((dftmark = strstr(path, LUA_PATH_SEP LUA_PATH_SEP)) == NULL) - lua_pushstring(L, path); /* nothing to change */ - else { /* path contains a ";;": insert default path in its place */ - size_t len = strlen(path); - luaL_Buffer b; - luaL_buffinit(L, &b); - if (path < dftmark) { /* is there a prefix before ';;'? */ - luaL_addlstring(&b, path, ct_diff2sz(dftmark - path)); /* add it */ - luaL_addchar(&b, *LUA_PATH_SEP); - } - luaL_addstring(&b, dft); /* add default */ - if (dftmark < path + len - 2) { /* is there a suffix after ';;'? */ - luaL_addchar(&b, *LUA_PATH_SEP); - luaL_addlstring(&b, dftmark + 2, ct_diff2sz((path + len - 2) - dftmark)); - } - luaL_pushresult(&b); - } - setprogdir(L); - lua_setfield(L, -3, fieldname); /* package[fieldname] = path value */ - lua_pop(L, 1); /* pop versioned variable name ('nver') */ -} - -/* }================================================================== */ - - -/* -** External strings created by DLLs may need the DLL code to be -** deallocated. This implies that a DLL can only be unloaded after all -** its strings were deallocated. To ensure that, we create a 'library -** string' to represent each DLL, and when this string is deallocated -** it closes its corresponding DLL. -** (The string itself is irrelevant; its userdata is the DLL pointer.) -*/ - - -/* -** return registry.CLIBS[path] -*/ -static void *checkclib (lua_State *L, const char *path) { - void *plib; - lua_getfield(L, LUA_REGISTRYINDEX, CLIBS); - lua_getfield(L, -1, path); - plib = lua_touserdata(L, -1); /* plib = CLIBS[path] */ - lua_pop(L, 2); /* pop CLIBS table and 'plib' */ - return plib; -} - - -/* -** Deallocate function for library strings. -** Unload the DLL associated with the string being deallocated. -*/ -static void *freelib (void *ud, void *ptr, size_t osize, size_t nsize) { - /* string itself is irrelevant and static */ - (void)ptr; (void)osize; (void)nsize; - lsys_unloadlib(ud); /* unload library represented by the string */ - return NULL; -} - - -/* -** Create a library string that, when deallocated, will unload 'plib' -*/ -static void createlibstr (lua_State *L, void *plib) { - /* common content for all library strings */ - static const char dummy[] = "01234567890"; - lua_pushexternalstring(L, dummy, sizeof(dummy) - 1, freelib, plib); -} - - -/* -** registry.CLIBS[path] = plib -- for queries. -** Also create a reference to strlib, so that the library string will -** only be collected when registry.CLIBS is collected. -*/ -static void addtoclib (lua_State *L, const char *path, void *plib) { - lua_getfield(L, LUA_REGISTRYINDEX, CLIBS); - lua_pushlightuserdata(L, plib); - lua_setfield(L, -2, path); /* CLIBS[path] = plib */ - createlibstr(L, plib); - luaL_ref(L, -2); /* keep library string in CLIBS */ - lua_pop(L, 1); /* pop CLIBS table */ -} - - -/* error codes for 'lookforfunc' */ -#define ERRLIB 1 -#define ERRFUNC 2 - -/* -** Look for a C function named 'sym' in a dynamically loaded library -** 'path'. -** First, check whether the library is already loaded; if not, try -** to load it. -** Then, if 'sym' is '*', return true (as library has been loaded). -** Otherwise, look for symbol 'sym' in the library and push a -** C function with that symbol. -** Return 0 with 'true' or a function in the stack; in case of -** errors, return an error code with an error message in the stack. -*/ -static int lookforfunc (lua_State *L, const char *path, const char *sym) { - void *reg = checkclib(L, path); /* check loaded C libraries */ - if (reg == NULL) { /* must load library? */ - reg = lsys_load(L, path, *sym == '*'); /* global symbols if 'sym'=='*' */ - if (reg == NULL) return ERRLIB; /* unable to load library */ - addtoclib(L, path, reg); - } - if (*sym == '*') { /* loading only library (no function)? */ - lua_pushboolean(L, 1); /* return 'true' */ - return 0; /* no errors */ - } - else { - lua_CFunction f = lsys_sym(L, reg, sym); - if (f == NULL) - return ERRFUNC; /* unable to find function */ - lua_pushcfunction(L, f); /* else create new function */ - return 0; /* no errors */ - } -} - - -static int ll_loadlib (lua_State *L) { - const char *path = luaL_checkstring(L, 1); - const char *init = luaL_checkstring(L, 2); - int stat = lookforfunc(L, path, init); - if (l_likely(stat == 0)) /* no errors? */ - return 1; /* return the loaded function */ - else { /* error; error message is on stack top */ - luaL_pushfail(L); - lua_insert(L, -2); - lua_pushstring(L, (stat == ERRLIB) ? LIB_FAIL : "init"); - return 3; /* return fail, error message, and where */ - } -} - - - -/* -** {====================================================== -** 'require' function -** ======================================================= -*/ - - -static int readable (const char *filename) { - FILE *f = fopen(filename, "r"); /* try to open file */ - if (f == NULL) return 0; /* open failed */ - fclose(f); - return 1; -} - - -/* -** Get the next name in '*path' = 'name1;name2;name3;...', changing -** the ending ';' to '\0' to create a zero-terminated string. Return -** NULL when list ends. -*/ -static const char *getnextfilename (char **path, char *end) { - char *sep; - char *name = *path; - if (name == end) - return NULL; /* no more names */ - else if (*name == '\0') { /* from previous iteration? */ - *name = *LUA_PATH_SEP; /* restore separator */ - name++; /* skip it */ - } - sep = strchr(name, *LUA_PATH_SEP); /* find next separator */ - if (sep == NULL) /* separator not found? */ - sep = end; /* name goes until the end */ - *sep = '\0'; /* finish file name */ - *path = sep; /* will start next search from here */ - return name; -} - - -/* -** Given a path such as ";blabla.so;blublu.so", pushes the string -** -** no file 'blabla.so' -** no file 'blublu.so' -*/ -static void pusherrornotfound (lua_State *L, const char *path) { - luaL_Buffer b; - luaL_buffinit(L, &b); - luaL_addstring(&b, "no file '"); - luaL_addgsub(&b, path, LUA_PATH_SEP, "'\n\tno file '"); - luaL_addstring(&b, "'"); - luaL_pushresult(&b); -} - - -static const char *searchpath (lua_State *L, const char *name, - const char *path, - const char *sep, - const char *dirsep) { - luaL_Buffer buff; - char *pathname; /* path with name inserted */ - char *endpathname; /* its end */ - const char *filename; - /* separator is non-empty and appears in 'name'? */ - if (*sep != '\0' && strchr(name, *sep) != NULL) - name = luaL_gsub(L, name, sep, dirsep); /* replace it by 'dirsep' */ - luaL_buffinit(L, &buff); - /* add path to the buffer, replacing marks ('?') with the file name */ - luaL_addgsub(&buff, path, LUA_PATH_MARK, name); - luaL_addchar(&buff, '\0'); - pathname = luaL_buffaddr(&buff); /* writable list of file names */ - endpathname = pathname + luaL_bufflen(&buff) - 1; - while ((filename = getnextfilename(&pathname, endpathname)) != NULL) { - if (readable(filename)) /* does file exist and is readable? */ - return lua_pushstring(L, filename); /* save and return name */ - } - luaL_pushresult(&buff); /* push path to create error message */ - pusherrornotfound(L, lua_tostring(L, -1)); /* create error message */ - return NULL; /* not found */ -} - - -static int ll_searchpath (lua_State *L) { - const char *f = searchpath(L, luaL_checkstring(L, 1), - luaL_checkstring(L, 2), - luaL_optstring(L, 3, "."), - luaL_optstring(L, 4, LUA_DIRSEP)); - if (f != NULL) return 1; - else { /* error message is on top of the stack */ - luaL_pushfail(L); - lua_insert(L, -2); - return 2; /* return fail + error message */ - } -} - - -static const char *findfile (lua_State *L, const char *name, - const char *pname, - const char *dirsep) { - const char *path; - lua_getfield(L, lua_upvalueindex(1), pname); - path = lua_tostring(L, -1); - if (l_unlikely(path == NULL)) - luaL_error(L, "'package.%s' must be a string", pname); - return searchpath(L, name, path, ".", dirsep); -} - - -static int checkload (lua_State *L, int stat, const char *filename) { - if (l_likely(stat)) { /* module loaded successfully? */ - lua_pushstring(L, filename); /* will be 2nd argument to module */ - return 2; /* return open function and file name */ - } - else - return luaL_error(L, "error loading module '%s' from file '%s':\n\t%s", - lua_tostring(L, 1), filename, lua_tostring(L, -1)); -} - - -static int searcher_Lua (lua_State *L) { - const char *filename; - const char *name = luaL_checkstring(L, 1); - filename = findfile(L, name, "path", LUA_LSUBSEP); - if (filename == NULL) return 1; /* module not found in this path */ - return checkload(L, (luaL_loadfilex(L, filename, "bt") == LUA_OK), filename); -} - - -/* -** Try to find a load function for module 'modname' at file 'filename'. -** First, change '.' to '_' in 'modname'; then, if 'modname' has -** the form X-Y (that is, it has an "ignore mark"), build a function -** name "luaopen_X" and look for it. (For compatibility, if that -** fails, it also tries "luaopen_Y".) If there is no ignore mark, -** look for a function named "luaopen_modname". -*/ -static int loadfunc (lua_State *L, const char *filename, const char *modname) { - const char *openfunc; - const char *mark; - modname = luaL_gsub(L, modname, ".", LUA_OFSEP); - mark = strchr(modname, *LUA_IGMARK); - if (mark) { - int stat; - openfunc = lua_pushlstring(L, modname, ct_diff2sz(mark - modname)); - openfunc = lua_pushfstring(L, LUA_POF"%s", openfunc); - stat = lookforfunc(L, filename, openfunc); - if (stat != ERRFUNC) return stat; - modname = mark + 1; /* else go ahead and try old-style name */ - } - openfunc = lua_pushfstring(L, LUA_POF"%s", modname); - return lookforfunc(L, filename, openfunc); -} - - -static int searcher_C (lua_State *L) { - const char *name = luaL_checkstring(L, 1); - const char *filename = findfile(L, name, "cpath", LUA_CSUBSEP); - if (filename == NULL) return 1; /* module not found in this path */ - return checkload(L, (loadfunc(L, filename, name) == 0), filename); -} - - -static int searcher_Croot (lua_State *L) { - const char *filename; - const char *name = luaL_checkstring(L, 1); - const char *p = strchr(name, '.'); - int stat; - if (p == NULL) return 0; /* is root */ - lua_pushlstring(L, name, ct_diff2sz(p - name)); - filename = findfile(L, lua_tostring(L, -1), "cpath", LUA_CSUBSEP); - if (filename == NULL) return 1; /* root not found */ - if ((stat = loadfunc(L, filename, name)) != 0) { - if (stat != ERRFUNC) - return checkload(L, 0, filename); /* real error */ - else { /* open function not found */ - lua_pushfstring(L, "no module '%s' in file '%s'", name, filename); - return 1; - } - } - lua_pushstring(L, filename); /* will be 2nd argument to module */ - return 2; -} - - -static int searcher_preload (lua_State *L) { - const char *name = luaL_checkstring(L, 1); - lua_getfield(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE); - if (lua_getfield(L, -1, name) == LUA_TNIL) { /* not found? */ - lua_pushfstring(L, "no field package.preload['%s']", name); - return 1; - } - else { - lua_pushliteral(L, ":preload:"); - return 2; - } -} - - -static void findloader (lua_State *L, const char *name) { - int i; - luaL_Buffer msg; /* to build error message */ - /* push 'package.searchers' to index 3 in the stack */ - if (l_unlikely(lua_getfield(L, lua_upvalueindex(1), "searchers") - != LUA_TTABLE)) - luaL_error(L, "'package.searchers' must be a table"); - luaL_buffinit(L, &msg); - luaL_addstring(&msg, "\n\t"); /* error-message prefix for first message */ - /* iterate over available searchers to find a loader */ - for (i = 1; ; i++) { - if (l_unlikely(lua_rawgeti(L, 3, i) == LUA_TNIL)) { /* no more searchers? */ - lua_pop(L, 1); /* remove nil */ - luaL_buffsub(&msg, 2); /* remove last prefix */ - luaL_pushresult(&msg); /* create error message */ - luaL_error(L, "module '%s' not found:%s", name, lua_tostring(L, -1)); - } - lua_pushstring(L, name); - lua_call(L, 1, 2); /* call it */ - if (lua_isfunction(L, -2)) /* did it find a loader? */ - return; /* module loader found */ - else if (lua_isstring(L, -2)) { /* searcher returned error message? */ - lua_pop(L, 1); /* remove extra return */ - luaL_addvalue(&msg); /* concatenate error message */ - luaL_addstring(&msg, "\n\t"); /* prefix for next message */ - } - else /* no error message */ - lua_pop(L, 2); /* remove both returns */ - } -} - - -static int ll_require (lua_State *L) { - const char *name = luaL_checkstring(L, 1); - lua_settop(L, 1); /* LOADED table will be at index 2 */ - lua_getfield(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE); - lua_getfield(L, 2, name); /* LOADED[name] */ - if (lua_toboolean(L, -1)) /* is it there? */ - return 1; /* package is already loaded */ - /* else must load package */ - lua_pop(L, 1); /* remove 'getfield' result */ - findloader(L, name); - lua_rotate(L, -2, 1); /* function <-> loader data */ - lua_pushvalue(L, 1); /* name is 1st argument to module loader */ - lua_pushvalue(L, -3); /* loader data is 2nd argument */ - /* stack: ...; loader data; loader function; mod. name; loader data */ - lua_call(L, 2, 1); /* run loader to load module */ - /* stack: ...; loader data; result from loader */ - if (!lua_isnil(L, -1)) /* non-nil return? */ - lua_setfield(L, 2, name); /* LOADED[name] = returned value */ - else - lua_pop(L, 1); /* pop nil */ - if (lua_getfield(L, 2, name) == LUA_TNIL) { /* module set no value? */ - lua_pushboolean(L, 1); /* use true as result */ - lua_copy(L, -1, -2); /* replace loader result */ - lua_setfield(L, 2, name); /* LOADED[name] = true */ - } - lua_rotate(L, -2, 1); /* loader data <-> module result */ - return 2; /* return module result and loader data */ -} - -/* }====================================================== */ - - - - -static const luaL_Reg pk_funcs[] = { - {"loadlib", ll_loadlib}, - {"searchpath", ll_searchpath}, - /* placeholders */ - {"preload", NULL}, - {"cpath", NULL}, - {"path", NULL}, - {"searchers", NULL}, - {"loaded", NULL}, - {NULL, NULL} -}; - - -static const luaL_Reg ll_funcs[] = { - {"require", ll_require}, - {NULL, NULL} -}; - - -static void createsearcherstable (lua_State *L) { - static const lua_CFunction searchers[] = { - searcher_preload, - searcher_Lua, - searcher_C, - searcher_Croot, - NULL - }; - int i; - /* create 'searchers' table */ - lua_createtable(L, sizeof(searchers)/sizeof(searchers[0]) - 1, 0); - /* fill it with predefined searchers */ - for (i=0; searchers[i] != NULL; i++) { - lua_pushvalue(L, -2); /* set 'package' as upvalue for all searchers */ - lua_pushcclosure(L, searchers[i], 1); - lua_rawseti(L, -2, i+1); - } - lua_setfield(L, -2, "searchers"); /* put it in field 'searchers' */ -} - - -LUAMOD_API int luaopen_package (lua_State *L) { - luaL_getsubtable(L, LUA_REGISTRYINDEX, CLIBS); /* create CLIBS table */ - lua_pop(L, 1); /* will not use it now */ - luaL_newlib(L, pk_funcs); /* create 'package' table */ - createsearcherstable(L); - /* set paths */ - setpath(L, "path", LUA_PATH_VAR, LUA_PATH_DEFAULT); - setpath(L, "cpath", LUA_CPATH_VAR, LUA_CPATH_DEFAULT); - /* store config information */ - lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATH_SEP "\n" LUA_PATH_MARK "\n" - LUA_EXEC_DIR "\n" LUA_IGMARK "\n"); - lua_setfield(L, -2, "config"); - /* set field 'loaded' */ - luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE); - lua_setfield(L, -2, "loaded"); - /* set field 'preload' */ - luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE); - lua_setfield(L, -2, "preload"); - lua_pushglobaltable(L); - lua_pushvalue(L, -2); /* set 'package' as upvalue for next lib */ - luaL_setfuncs(L, ll_funcs, 1); /* open lib into global table */ - lua_pop(L, 1); /* pop global table */ - return 1; /* return 'package' table */ -} - diff --git a/lib/lua/lobject.c b/lib/lua/lobject.c deleted file mode 100644 index 763b484..0000000 --- a/lib/lua/lobject.c +++ /dev/null @@ -1,718 +0,0 @@ -/* -** $Id: lobject.c $ -** Some generic functions over Lua objects -** See Copyright Notice in lua.h -*/ - -#define lobject_c -#define LUA_CORE - -#include "lprefix.h" - - -#include -#include -#include -#include -#include -#include -#include - -#include "lua.h" - -#include "lctype.h" -#include "ldebug.h" -#include "ldo.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" -#include "lstring.h" -#include "lvm.h" - - -/* -** Computes ceil(log2(x)), which is the smallest integer n such that -** x <= (1 << n). -*/ -lu_byte luaO_ceillog2 (unsigned int x) { - static const lu_byte log_2[256] = { /* log_2[i - 1] = ceil(log2(i)) */ - 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, - 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8 - }; - int l = 0; - x--; - while (x >= 256) { l += 8; x >>= 8; } - return cast_byte(l + log_2[x]); -} - -/* -** Encodes 'p'% as a floating-point byte, represented as (eeeexxxx). -** The exponent is represented using excess-7. Mimicking IEEE 754, the -** representation normalizes the number when possible, assuming an extra -** 1 before the mantissa (xxxx) and adding one to the exponent (eeee) -** to signal that. So, the real value is (1xxxx) * 2^(eeee - 7 - 1) if -** eeee != 0, and (xxxx) * 2^-7 otherwise (subnormal numbers). -*/ -lu_byte luaO_codeparam (unsigned int p) { - if (p >= (cast(lu_mem, 0x1F) << (0xF - 7 - 1)) * 100u) /* overflow? */ - return 0xFF; /* return maximum value */ - else { - p = (cast(l_uint32, p) * 128 + 99) / 100; /* round up the division */ - if (p < 0x10) { /* subnormal number? */ - /* exponent bits are already zero; nothing else to do */ - return cast_byte(p); - } - else { /* p >= 0x10 implies ceil(log2(p + 1)) >= 5 */ - /* preserve 5 bits in 'p' */ - unsigned log = luaO_ceillog2(p + 1) - 5u; - return cast_byte(((p >> log) - 0x10) | ((log + 1) << 4)); - } - } -} - - -/* -** Computes 'p' times 'x', where 'p' is a floating-point byte. Roughly, -** we have to multiply 'x' by the mantissa and then shift accordingly to -** the exponent. If the exponent is positive, both the multiplication -** and the shift increase 'x', so we have to care only about overflows. -** For negative exponents, however, multiplying before the shift keeps -** more significant bits, as long as the multiplication does not -** overflow, so we check which order is best. -*/ -l_mem luaO_applyparam (lu_byte p, l_mem x) { - int m = p & 0xF; /* mantissa */ - int e = (p >> 4); /* exponent */ - if (e > 0) { /* normalized? */ - e--; /* correct exponent */ - m += 0x10; /* correct mantissa; maximum value is 0x1F */ - } - e -= 7; /* correct excess-7 */ - if (e >= 0) { - if (x < (MAX_LMEM / 0x1F) >> e) /* no overflow? */ - return (x * m) << e; /* order doesn't matter here */ - else /* real overflow */ - return MAX_LMEM; - } - else { /* negative exponent */ - e = -e; - if (x < MAX_LMEM / 0x1F) /* multiplication cannot overflow? */ - return (x * m) >> e; /* multiplying first gives more precision */ - else if ((x >> e) < MAX_LMEM / 0x1F) /* cannot overflow after shift? */ - return (x >> e) * m; - else /* real overflow */ - return MAX_LMEM; - } -} - - -static lua_Integer intarith (lua_State *L, int op, lua_Integer v1, - lua_Integer v2) { - switch (op) { - case LUA_OPADD: return intop(+, v1, v2); - case LUA_OPSUB:return intop(-, v1, v2); - case LUA_OPMUL:return intop(*, v1, v2); - case LUA_OPMOD: return luaV_mod(L, v1, v2); - case LUA_OPIDIV: return luaV_idiv(L, v1, v2); - case LUA_OPBAND: return intop(&, v1, v2); - case LUA_OPBOR: return intop(|, v1, v2); - case LUA_OPBXOR: return intop(^, v1, v2); - case LUA_OPSHL: return luaV_shiftl(v1, v2); - case LUA_OPSHR: return luaV_shiftr(v1, v2); - case LUA_OPUNM: return intop(-, 0, v1); - case LUA_OPBNOT: return intop(^, ~l_castS2U(0), v1); - default: lua_assert(0); return 0; - } -} - - -static lua_Number numarith (lua_State *L, int op, lua_Number v1, - lua_Number v2) { - switch (op) { - case LUA_OPADD: return luai_numadd(L, v1, v2); - case LUA_OPSUB: return luai_numsub(L, v1, v2); - case LUA_OPMUL: return luai_nummul(L, v1, v2); - case LUA_OPDIV: return luai_numdiv(L, v1, v2); - case LUA_OPPOW: return luai_numpow(L, v1, v2); - case LUA_OPIDIV: return luai_numidiv(L, v1, v2); - case LUA_OPUNM: return luai_numunm(L, v1); - case LUA_OPMOD: return luaV_modf(L, v1, v2); - default: lua_assert(0); return 0; - } -} - - -int luaO_rawarith (lua_State *L, int op, const TValue *p1, const TValue *p2, - TValue *res) { - switch (op) { - case LUA_OPBAND: case LUA_OPBOR: case LUA_OPBXOR: - case LUA_OPSHL: case LUA_OPSHR: - case LUA_OPBNOT: { /* operate only on integers */ - lua_Integer i1; lua_Integer i2; - if (tointegerns(p1, &i1) && tointegerns(p2, &i2)) { - setivalue(res, intarith(L, op, i1, i2)); - return 1; - } - else return 0; /* fail */ - } - case LUA_OPDIV: case LUA_OPPOW: { /* operate only on floats */ - lua_Number n1; lua_Number n2; - if (tonumberns(p1, n1) && tonumberns(p2, n2)) { - setfltvalue(res, numarith(L, op, n1, n2)); - return 1; - } - else return 0; /* fail */ - } - default: { /* other operations */ - lua_Number n1; lua_Number n2; - if (ttisinteger(p1) && ttisinteger(p2)) { - setivalue(res, intarith(L, op, ivalue(p1), ivalue(p2))); - return 1; - } - else if (tonumberns(p1, n1) && tonumberns(p2, n2)) { - setfltvalue(res, numarith(L, op, n1, n2)); - return 1; - } - else return 0; /* fail */ - } - } -} - - -void luaO_arith (lua_State *L, int op, const TValue *p1, const TValue *p2, - StkId res) { - if (!luaO_rawarith(L, op, p1, p2, s2v(res))) { - /* could not perform raw operation; try metamethod */ - luaT_trybinTM(L, p1, p2, res, cast(TMS, (op - LUA_OPADD) + TM_ADD)); - } -} - - -lu_byte luaO_hexavalue (int c) { - lua_assert(lisxdigit(c)); - if (lisdigit(c)) return cast_byte(c - '0'); - else return cast_byte((ltolower(c) - 'a') + 10); -} - - -static int isneg (const char **s) { - if (**s == '-') { (*s)++; return 1; } - else if (**s == '+') (*s)++; - return 0; -} - - - -/* -** {================================================================== -** Lua's implementation for 'lua_strx2number' -** =================================================================== -*/ - -#if !defined(lua_strx2number) - -/* maximum number of significant digits to read (to avoid overflows - even with single floats) */ -#define MAXSIGDIG 30 - -/* -** convert a hexadecimal numeric string to a number, following -** C99 specification for 'strtod' -*/ -static lua_Number lua_strx2number (const char *s, char **endptr) { - int dot = lua_getlocaledecpoint(); - lua_Number r = l_mathop(0.0); /* result (accumulator) */ - int sigdig = 0; /* number of significant digits */ - int nosigdig = 0; /* number of non-significant digits */ - int e = 0; /* exponent correction */ - int neg; /* 1 if number is negative */ - int hasdot = 0; /* true after seen a dot */ - *endptr = cast_charp(s); /* nothing is valid yet */ - while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */ - neg = isneg(&s); /* check sign */ - if (!(*s == '0' && (*(s + 1) == 'x' || *(s + 1) == 'X'))) /* check '0x' */ - return l_mathop(0.0); /* invalid format (no '0x') */ - for (s += 2; ; s++) { /* skip '0x' and read numeral */ - if (*s == dot) { - if (hasdot) break; /* second dot? stop loop */ - else hasdot = 1; - } - else if (lisxdigit(cast_uchar(*s))) { - if (sigdig == 0 && *s == '0') /* non-significant digit (zero)? */ - nosigdig++; - else if (++sigdig <= MAXSIGDIG) /* can read it without overflow? */ - r = (r * l_mathop(16.0)) + luaO_hexavalue(*s); - else e++; /* too many digits; ignore, but still count for exponent */ - if (hasdot) e--; /* decimal digit? correct exponent */ - } - else break; /* neither a dot nor a digit */ - } - if (nosigdig + sigdig == 0) /* no digits? */ - return l_mathop(0.0); /* invalid format */ - *endptr = cast_charp(s); /* valid up to here */ - e *= 4; /* each digit multiplies/divides value by 2^4 */ - if (*s == 'p' || *s == 'P') { /* exponent part? */ - int exp1 = 0; /* exponent value */ - int neg1; /* exponent sign */ - s++; /* skip 'p' */ - neg1 = isneg(&s); /* sign */ - if (!lisdigit(cast_uchar(*s))) - return l_mathop(0.0); /* invalid; must have at least one digit */ - while (lisdigit(cast_uchar(*s))) /* read exponent */ - exp1 = exp1 * 10 + *(s++) - '0'; - if (neg1) exp1 = -exp1; - e += exp1; - *endptr = cast_charp(s); /* valid up to here */ - } - if (neg) r = -r; - return l_mathop(ldexp)(r, e); -} - -#endif -/* }====================================================== */ - - -/* maximum length of a numeral to be converted to a number */ -#if !defined (L_MAXLENNUM) -#define L_MAXLENNUM 200 -#endif - -/* -** Convert string 's' to a Lua number (put in 'result'). Return NULL on -** fail or the address of the ending '\0' on success. ('mode' == 'x') -** means a hexadecimal numeral. -*/ -static const char *l_str2dloc (const char *s, lua_Number *result, int mode) { - char *endptr; - *result = (mode == 'x') ? lua_strx2number(s, &endptr) /* try to convert */ - : lua_str2number(s, &endptr); - if (endptr == s) return NULL; /* nothing recognized? */ - while (lisspace(cast_uchar(*endptr))) endptr++; /* skip trailing spaces */ - return (*endptr == '\0') ? endptr : NULL; /* OK iff no trailing chars */ -} - - -/* -** Convert string 's' to a Lua number (put in 'result') handling the -** current locale. -** This function accepts both the current locale or a dot as the radix -** mark. If the conversion fails, it may mean number has a dot but -** locale accepts something else. In that case, the code copies 's' -** to a buffer (because 's' is read-only), changes the dot to the -** current locale radix mark, and tries to convert again. -** The variable 'mode' checks for special characters in the string: -** - 'n' means 'inf' or 'nan' (which should be rejected) -** - 'x' means a hexadecimal numeral -** - '.' just optimizes the search for the common case (no special chars) -*/ -static const char *l_str2d (const char *s, lua_Number *result) { - const char *endptr; - const char *pmode = strpbrk(s, ".xXnN"); /* look for special chars */ - int mode = pmode ? ltolower(cast_uchar(*pmode)) : 0; - if (mode == 'n') /* reject 'inf' and 'nan' */ - return NULL; - endptr = l_str2dloc(s, result, mode); /* try to convert */ - if (endptr == NULL) { /* failed? may be a different locale */ - char buff[L_MAXLENNUM + 1]; - const char *pdot = strchr(s, '.'); - if (pdot == NULL || strlen(s) > L_MAXLENNUM) - return NULL; /* string too long or no dot; fail */ - strcpy(buff, s); /* copy string to buffer */ - buff[pdot - s] = lua_getlocaledecpoint(); /* correct decimal point */ - endptr = l_str2dloc(buff, result, mode); /* try again */ - if (endptr != NULL) - endptr = s + (endptr - buff); /* make relative to 's' */ - } - return endptr; -} - - -#define MAXBY10 cast(lua_Unsigned, LUA_MAXINTEGER / 10) -#define MAXLASTD cast_int(LUA_MAXINTEGER % 10) - -static const char *l_str2int (const char *s, lua_Integer *result) { - lua_Unsigned a = 0; - int empty = 1; - int neg; - while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */ - neg = isneg(&s); - if (s[0] == '0' && - (s[1] == 'x' || s[1] == 'X')) { /* hex? */ - s += 2; /* skip '0x' */ - for (; lisxdigit(cast_uchar(*s)); s++) { - a = a * 16 + luaO_hexavalue(*s); - empty = 0; - } - } - else { /* decimal */ - for (; lisdigit(cast_uchar(*s)); s++) { - int d = *s - '0'; - if (a >= MAXBY10 && (a > MAXBY10 || d > MAXLASTD + neg)) /* overflow? */ - return NULL; /* do not accept it (as integer) */ - a = a * 10 + cast_uint(d); - empty = 0; - } - } - while (lisspace(cast_uchar(*s))) s++; /* skip trailing spaces */ - if (empty || *s != '\0') return NULL; /* something wrong in the numeral */ - else { - *result = l_castU2S((neg) ? 0u - a : a); - return s; - } -} - - -size_t luaO_str2num (const char *s, TValue *o) { - lua_Integer i; lua_Number n; - const char *e; - if ((e = l_str2int(s, &i)) != NULL) { /* try as an integer */ - setivalue(o, i); - } - else if ((e = l_str2d(s, &n)) != NULL) { /* else try as a float */ - setfltvalue(o, n); - } - else - return 0; /* conversion failed */ - return ct_diff2sz(e - s) + 1; /* success; return string size */ -} - - -int luaO_utf8esc (char *buff, l_uint32 x) { - int n = 1; /* number of bytes put in buffer (backwards) */ - lua_assert(x <= 0x7FFFFFFFu); - if (x < 0x80) /* ASCII? */ - buff[UTF8BUFFSZ - 1] = cast_char(x); - else { /* need continuation bytes */ - unsigned int mfb = 0x3f; /* maximum that fits in first byte */ - do { /* add continuation bytes */ - buff[UTF8BUFFSZ - (n++)] = cast_char(0x80 | (x & 0x3f)); - x >>= 6; /* remove added bits */ - mfb >>= 1; /* now there is one less bit available in first byte */ - } while (x > mfb); /* still needs continuation byte? */ - buff[UTF8BUFFSZ - n] = cast_char((~mfb << 1) | x); /* add first byte */ - } - return n; -} - - -/* -** The size of the buffer for the conversion of a number to a string -** 'LUA_N2SBUFFSZ' must be enough to accommodate both LUA_INTEGER_FMT -** and LUA_NUMBER_FMT. For a long long int, this is 19 digits plus a -** sign and a final '\0', adding to 21. For a long double, it can go to -** a sign, the dot, an exponent letter, an exponent sign, 4 exponent -** digits, the final '\0', plus the significant digits, which are -** approximately the *_DIG attribute. -*/ -#if LUA_N2SBUFFSZ < (20 + l_floatatt(DIG)) -#error "invalid value for LUA_N2SBUFFSZ" -#endif - - -/* -** Convert a float to a string, adding it to a buffer. First try with -** a not too large number of digits, to avoid noise (for instance, -** 1.1 going to "1.1000000000000001"). If that lose precision, so -** that reading the result back gives a different number, then do the -** conversion again with extra precision. Moreover, if the numeral looks -** like an integer (without a decimal point or an exponent), add ".0" to -** its end. -*/ -static int tostringbuffFloat (lua_Number n, char *buff) { - /* first conversion */ - int len = l_sprintf(buff, LUA_N2SBUFFSZ, LUA_NUMBER_FMT, - (LUAI_UACNUMBER)n); - lua_Number check = lua_str2number(buff, NULL); /* read it back */ - if (check != n) { /* not enough precision? */ - /* convert again with more precision */ - len = l_sprintf(buff, LUA_N2SBUFFSZ, LUA_NUMBER_FMT_N, - (LUAI_UACNUMBER)n); - } - /* looks like an integer? */ - if (buff[strspn(buff, "-0123456789")] == '\0') { - buff[len++] = lua_getlocaledecpoint(); - buff[len++] = '0'; /* adds '.0' to result */ - } - return len; -} - - -/* -** Convert a number object to a string, adding it to a buffer. -*/ -unsigned luaO_tostringbuff (const TValue *obj, char *buff) { - int len; - lua_assert(ttisnumber(obj)); - if (ttisinteger(obj)) - len = lua_integer2str(buff, LUA_N2SBUFFSZ, ivalue(obj)); - else - len = tostringbuffFloat(fltvalue(obj), buff); - lua_assert(len < LUA_N2SBUFFSZ); - return cast_uint(len); -} - - -/* -** Convert a number object to a Lua string, replacing the value at 'obj' -*/ -void luaO_tostring (lua_State *L, TValue *obj) { - char buff[LUA_N2SBUFFSZ]; - unsigned len = luaO_tostringbuff(obj, buff); - setsvalue(L, obj, luaS_newlstr(L, buff, len)); -} - - - - -/* -** {================================================================== -** 'luaO_pushvfstring' -** =================================================================== -*/ - -/* -** Size for buffer space used by 'luaO_pushvfstring'. It should be -** (LUA_IDSIZE + LUA_N2SBUFFSZ) + a minimal space for basic messages, -** so that 'luaG_addinfo' can work directly on the static buffer. -*/ -#define BUFVFS cast_uint(LUA_IDSIZE + LUA_N2SBUFFSZ + 95) - -/* -** Buffer used by 'luaO_pushvfstring'. 'err' signals an error while -** building result (memory error [1] or buffer overflow [2]). -*/ -typedef struct BuffFS { - lua_State *L; - char *b; - size_t buffsize; - size_t blen; /* length of string in 'buff' */ - int err; - char space[BUFVFS]; /* initial buffer */ -} BuffFS; - - -static void initbuff (lua_State *L, BuffFS *buff) { - buff->L = L; - buff->b = buff->space; - buff->buffsize = sizeof(buff->space); - buff->blen = 0; - buff->err = 0; -} - - -/* -** Push final result from 'luaO_pushvfstring'. This function may raise -** errors explicitly or through memory errors, so it must run protected. -*/ -static void pushbuff (lua_State *L, void *ud) { - BuffFS *buff = cast(BuffFS*, ud); - switch (buff->err) { - case 1: /* memory error */ - luaD_throw(L, LUA_ERRMEM); - break; - case 2: /* length overflow: Add "..." at the end of result */ - if (buff->buffsize - buff->blen < 3) - strcpy(buff->b + buff->blen - 3, "..."); /* 'blen' must be > 3 */ - else { /* there is enough space left for the "..." */ - strcpy(buff->b + buff->blen, "..."); - buff->blen += 3; - } - /* FALLTHROUGH */ - default: { /* no errors, but it can raise one creating the new string */ - TString *ts = luaS_newlstr(L, buff->b, buff->blen); - setsvalue2s(L, L->top.p, ts); - L->top.p++; - } - } -} - - -static const char *clearbuff (BuffFS *buff) { - lua_State *L = buff->L; - const char *res; - if (luaD_rawrunprotected(L, pushbuff, buff) != LUA_OK) /* errors? */ - res = NULL; /* error message is on the top of the stack */ - else - res = getstr(tsvalue(s2v(L->top.p - 1))); - if (buff->b != buff->space) /* using dynamic buffer? */ - luaM_freearray(L, buff->b, buff->buffsize); /* free it */ - return res; -} - - -static void addstr2buff (BuffFS *buff, const char *str, size_t slen) { - size_t left = buff->buffsize - buff->blen; /* space left in the buffer */ - if (buff->err) /* do nothing else after an error */ - return; - if (slen > left) { /* new string doesn't fit into current buffer? */ - if (slen > ((MAX_SIZE/2) - buff->blen)) { /* overflow? */ - memcpy(buff->b + buff->blen, str, left); /* copy what it can */ - buff->blen = buff->buffsize; - buff->err = 2; /* doesn't add anything else */ - return; - } - else { - size_t newsize = buff->buffsize + slen; /* limited to MAX_SIZE/2 */ - char *newb = - (buff->b == buff->space) /* still using static space? */ - ? luaM_reallocvector(buff->L, NULL, 0, newsize, char) - : luaM_reallocvector(buff->L, buff->b, buff->buffsize, newsize, - char); - if (newb == NULL) { /* allocation error? */ - buff->err = 1; /* signal a memory error */ - return; - } - if (buff->b == buff->space) /* new buffer (not reallocated)? */ - memcpy(newb, buff->b, buff->blen); /* copy previous content */ - buff->b = newb; /* set new (larger) buffer... */ - buff->buffsize = newsize; /* ...and its new size */ - } - } - memcpy(buff->b + buff->blen, str, slen); /* copy new content */ - buff->blen += slen; -} - - -/* -** Add a numeral to the buffer. -*/ -static void addnum2buff (BuffFS *buff, TValue *num) { - char numbuff[LUA_N2SBUFFSZ]; - unsigned len = luaO_tostringbuff(num, numbuff); - addstr2buff(buff, numbuff, len); -} - - -/* -** this function handles only '%d', '%c', '%f', '%p', '%s', and '%%' - conventional formats, plus Lua-specific '%I' and '%U' -*/ -const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) { - BuffFS buff; /* holds last part of the result */ - const char *e; /* points to next '%' */ - initbuff(L, &buff); - while ((e = strchr(fmt, '%')) != NULL) { - addstr2buff(&buff, fmt, ct_diff2sz(e - fmt)); /* add 'fmt' up to '%' */ - switch (*(e + 1)) { /* conversion specifier */ - case 's': { /* zero-terminated string */ - const char *s = va_arg(argp, char *); - if (s == NULL) s = "(null)"; - addstr2buff(&buff, s, strlen(s)); - break; - } - case 'c': { /* an 'int' as a character */ - char c = cast_char(va_arg(argp, int)); - addstr2buff(&buff, &c, sizeof(char)); - break; - } - case 'd': { /* an 'int' */ - TValue num; - setivalue(&num, va_arg(argp, int)); - addnum2buff(&buff, &num); - break; - } - case 'I': { /* a 'lua_Integer' */ - TValue num; - setivalue(&num, cast_Integer(va_arg(argp, l_uacInt))); - addnum2buff(&buff, &num); - break; - } - case 'f': { /* a 'lua_Number' */ - TValue num; - setfltvalue(&num, cast_num(va_arg(argp, l_uacNumber))); - addnum2buff(&buff, &num); - break; - } - case 'p': { /* a pointer */ - char bf[LUA_N2SBUFFSZ]; /* enough space for '%p' */ - void *p = va_arg(argp, void *); - int len = lua_pointer2str(bf, LUA_N2SBUFFSZ, p); - addstr2buff(&buff, bf, cast_uint(len)); - break; - } - case 'U': { /* an 'unsigned long' as a UTF-8 sequence */ - char bf[UTF8BUFFSZ]; - unsigned long arg = va_arg(argp, unsigned long); - int len = luaO_utf8esc(bf, cast(l_uint32, arg)); - addstr2buff(&buff, bf + UTF8BUFFSZ - len, cast_uint(len)); - break; - } - case '%': { - addstr2buff(&buff, "%", 1); - break; - } - default: { - addstr2buff(&buff, e, 2); /* keep unknown format in the result */ - break; - } - } - fmt = e + 2; /* skip '%' and the specifier */ - } - addstr2buff(&buff, fmt, strlen(fmt)); /* rest of 'fmt' */ - return clearbuff(&buff); /* empty buffer into a new string */ -} - - -const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) { - const char *msg; - va_list argp; - va_start(argp, fmt); - msg = luaO_pushvfstring(L, fmt, argp); - va_end(argp); - if (msg == NULL) /* error? */ - luaD_throw(L, LUA_ERRMEM); - return msg; -} - -/* }================================================================== */ - - -#define RETS "..." -#define PRE "[string \"" -#define POS "\"]" - -#define addstr(a,b,l) ( memcpy(a,b,(l) * sizeof(char)), a += (l) ) - -void luaO_chunkid (char *out, const char *source, size_t srclen) { - size_t bufflen = LUA_IDSIZE; /* free space in buffer */ - if (*source == '=') { /* 'literal' source */ - if (srclen <= bufflen) /* small enough? */ - memcpy(out, source + 1, srclen * sizeof(char)); - else { /* truncate it */ - addstr(out, source + 1, bufflen - 1); - *out = '\0'; - } - } - else if (*source == '@') { /* file name */ - if (srclen <= bufflen) /* small enough? */ - memcpy(out, source + 1, srclen * sizeof(char)); - else { /* add '...' before rest of name */ - addstr(out, RETS, LL(RETS)); - bufflen -= LL(RETS); - memcpy(out, source + 1 + srclen - bufflen, bufflen * sizeof(char)); - } - } - else { /* string; format as [string "source"] */ - const char *nl = strchr(source, '\n'); /* find first new line (if any) */ - addstr(out, PRE, LL(PRE)); /* add prefix */ - bufflen -= LL(PRE RETS POS) + 1; /* save space for prefix+suffix+'\0' */ - if (srclen < bufflen && nl == NULL) { /* small one-line source? */ - addstr(out, source, srclen); /* keep it */ - } - else { - if (nl != NULL) - srclen = ct_diff2sz(nl - source); /* stop at first newline */ - if (srclen > bufflen) srclen = bufflen; - addstr(out, source, srclen); - addstr(out, RETS, LL(RETS)); - } - memcpy(out, POS, (LL(POS) + 1) * sizeof(char)); - } -} - diff --git a/lib/lua/lobject.h b/lib/lua/lobject.h deleted file mode 100644 index bf5b65b..0000000 --- a/lib/lua/lobject.h +++ /dev/null @@ -1,865 +0,0 @@ -/* -** $Id: lobject.h $ -** Type definitions for Lua objects -** See Copyright Notice in lua.h -*/ - - -#ifndef lobject_h -#define lobject_h - - -#include - - -#include "llimits.h" -#include "lua.h" - - -/* -** Extra types for collectable non-values -*/ -#define LUA_TUPVAL LUA_NUMTYPES /* upvalues */ -#define LUA_TPROTO (LUA_NUMTYPES+1) /* function prototypes */ -#define LUA_TDEADKEY (LUA_NUMTYPES+2) /* removed keys in tables */ - - - -/* -** number of all possible types (including LUA_TNONE but excluding DEADKEY) -*/ -#define LUA_TOTALTYPES (LUA_TPROTO + 2) - - -/* -** tags for Tagged Values have the following use of bits: -** bits 0-3: actual tag (a LUA_T* constant) -** bits 4-5: variant bits -** bit 6: whether value is collectable -*/ - -/* add variant bits to a type */ -#define makevariant(t,v) ((t) | ((v) << 4)) - - - -/* -** Union of all Lua values -*/ -typedef union Value { - struct GCObject *gc; /* collectable objects */ - void *p; /* light userdata */ - lua_CFunction f; /* light C functions */ - lua_Integer i; /* integer numbers */ - lua_Number n; /* float numbers */ - /* not used, but may avoid warnings for uninitialized value */ - lu_byte ub; -} Value; - - -/* -** Tagged Values. This is the basic representation of values in Lua: -** an actual value plus a tag with its type. -*/ - -#define TValuefields Value value_; lu_byte tt_ - -typedef struct TValue { - TValuefields; -} TValue; - - -#define val_(o) ((o)->value_) -#define valraw(o) (val_(o)) - - -/* raw type tag of a TValue */ -#define rawtt(o) ((o)->tt_) - -/* tag with no variants (bits 0-3) */ -#define novariant(t) ((t) & 0x0F) - -/* type tag of a TValue (bits 0-3 for tags + variant bits 4-5) */ -#define withvariant(t) ((t) & 0x3F) -#define ttypetag(o) withvariant(rawtt(o)) - -/* type of a TValue */ -#define ttype(o) (novariant(rawtt(o))) - - -/* Macros to test type */ -#define checktag(o,t) (rawtt(o) == (t)) -#define checktype(o,t) (ttype(o) == (t)) - - -/* Macros for internal tests */ - -/* collectable object has the same tag as the original value */ -#define righttt(obj) (ttypetag(obj) == gcvalue(obj)->tt) - -/* -** Any value being manipulated by the program either is non -** collectable, or the collectable object has the right tag -** and it is not dead. The option 'L == NULL' allows other -** macros using this one to be used where L is not available. -*/ -#define checkliveness(L,obj) \ - ((void)L, lua_longassert(!iscollectable(obj) || \ - (righttt(obj) && (L == NULL || !isdead(G(L),gcvalue(obj)))))) - - -/* Macros to set values */ - -/* set a value's tag */ -#define settt_(o,t) ((o)->tt_=(t)) - - -/* main macro to copy values (from 'obj2' to 'obj1') */ -#define setobj(L,obj1,obj2) \ - { TValue *io1=(obj1); const TValue *io2=(obj2); \ - io1->value_ = io2->value_; settt_(io1, io2->tt_); \ - checkliveness(L,io1); lua_assert(!isnonstrictnil(io1)); } - -/* -** Different types of assignments, according to source and destination. -** (They are mostly equal now, but may be different in the future.) -*/ - -/* from stack to stack */ -#define setobjs2s(L,o1,o2) setobj(L,s2v(o1),s2v(o2)) -/* to stack (not from same stack) */ -#define setobj2s(L,o1,o2) setobj(L,s2v(o1),o2) -/* from table to same table */ -#define setobjt2t setobj -/* to new object */ -#define setobj2n setobj -/* to table */ -#define setobj2t setobj - - -/* -** Entries in a Lua stack. Field 'tbclist' forms a list of all -** to-be-closed variables active in this stack. Dummy entries are -** used when the distance between two tbc variables does not fit -** in an unsigned short. They are represented by delta==0, and -** their real delta is always the maximum value that fits in -** that field. -*/ -typedef union StackValue { - TValue val; - struct { - TValuefields; - unsigned short delta; - } tbclist; -} StackValue; - - -/* index to stack elements */ -typedef StackValue *StkId; - - -/* -** When reallocating the stack, change all pointers to the stack into -** proper offsets. -*/ -typedef union { - StkId p; /* actual pointer */ - ptrdiff_t offset; /* used while the stack is being reallocated */ -} StkIdRel; - - -/* convert a 'StackValue' to a 'TValue' */ -#define s2v(o) (&(o)->val) - - - -/* -** {================================================================== -** Nil -** =================================================================== -*/ - -/* Standard nil */ -#define LUA_VNIL makevariant(LUA_TNIL, 0) - -/* Empty slot (which might be different from a slot containing nil) */ -#define LUA_VEMPTY makevariant(LUA_TNIL, 1) - -/* Value returned for a key not found in a table (absent key) */ -#define LUA_VABSTKEY makevariant(LUA_TNIL, 2) - -/* Special variant to signal that a fast get is accessing a non-table */ -#define LUA_VNOTABLE makevariant(LUA_TNIL, 3) - - -/* macro to test for (any kind of) nil */ -#define ttisnil(v) checktype((v), LUA_TNIL) - -/* -** Macro to test the result of a table access. Formally, it should -** distinguish between LUA_VEMPTY/LUA_VABSTKEY/LUA_VNOTABLE and -** other tags. As currently nil is equivalent to LUA_VEMPTY, it is -** simpler to just test whether the value is nil. -*/ -#define tagisempty(tag) (novariant(tag) == LUA_TNIL) - - -/* macro to test for a standard nil */ -#define ttisstrictnil(o) checktag((o), LUA_VNIL) - - -#define setnilvalue(obj) settt_(obj, LUA_VNIL) -#define setnilvalue2s(stk) setnilvalue(s2v(stk)) - - -#define isabstkey(v) checktag((v), LUA_VABSTKEY) - - -/* -** macro to detect non-standard nils (used only in assertions) -*/ -#define isnonstrictnil(v) (ttisnil(v) && !ttisstrictnil(v)) - - -/* -** By default, entries with any kind of nil are considered empty. -** (In any definition, values associated with absent keys must also -** be accepted as empty.) -*/ -#define isempty(v) ttisnil(v) - - -/* macro defining a value corresponding to an absent key */ -#define ABSTKEYCONSTANT {NULL}, LUA_VABSTKEY - - -/* mark an entry as empty */ -#define setempty(v) settt_(v, LUA_VEMPTY) - - - -/* }================================================================== */ - - -/* -** {================================================================== -** Booleans -** =================================================================== -*/ - - -#define LUA_VFALSE makevariant(LUA_TBOOLEAN, 0) -#define LUA_VTRUE makevariant(LUA_TBOOLEAN, 1) - -#define ttisboolean(o) checktype((o), LUA_TBOOLEAN) -#define ttisfalse(o) checktag((o), LUA_VFALSE) -#define ttistrue(o) checktag((o), LUA_VTRUE) - - -#define l_isfalse(o) (ttisfalse(o) || ttisnil(o)) -#define tagisfalse(t) ((t) == LUA_VFALSE || novariant(t) == LUA_TNIL) - - - -#define setbfvalue(obj) settt_(obj, LUA_VFALSE) -#define setbtvalue(obj) settt_(obj, LUA_VTRUE) - -/* }================================================================== */ - - -/* -** {================================================================== -** Threads -** =================================================================== -*/ - -#define LUA_VTHREAD makevariant(LUA_TTHREAD, 0) - -#define ttisthread(o) checktag((o), ctb(LUA_VTHREAD)) - -#define thvalue(o) check_exp(ttisthread(o), gco2th(val_(o).gc)) - -#define setthvalue(L,obj,x) \ - { TValue *io = (obj); lua_State *x_ = (x); \ - val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VTHREAD)); \ - checkliveness(L,io); } - -#define setthvalue2s(L,o,t) setthvalue(L,s2v(o),t) - -/* }================================================================== */ - - -/* -** {================================================================== -** Collectable Objects -** =================================================================== -*/ - -/* -** Common Header for all collectable objects (in macro form, to be -** included in other objects) -*/ -#define CommonHeader struct GCObject *next; lu_byte tt; lu_byte marked - - -/* Common type for all collectable objects */ -typedef struct GCObject { - CommonHeader; -} GCObject; - - -/* Bit mark for collectable types */ -#define BIT_ISCOLLECTABLE (1 << 6) - -#define iscollectable(o) (rawtt(o) & BIT_ISCOLLECTABLE) - -/* mark a tag as collectable */ -#define ctb(t) ((t) | BIT_ISCOLLECTABLE) - -#define gcvalue(o) check_exp(iscollectable(o), val_(o).gc) - -#define gcvalueraw(v) ((v).gc) - -#define setgcovalue(L,obj,x) \ - { TValue *io = (obj); GCObject *i_g=(x); \ - val_(io).gc = i_g; settt_(io, ctb(i_g->tt)); } - -/* }================================================================== */ - - -/* -** {================================================================== -** Numbers -** =================================================================== -*/ - -/* Variant tags for numbers */ -#define LUA_VNUMINT makevariant(LUA_TNUMBER, 0) /* integer numbers */ -#define LUA_VNUMFLT makevariant(LUA_TNUMBER, 1) /* float numbers */ - -#define ttisnumber(o) checktype((o), LUA_TNUMBER) -#define ttisfloat(o) checktag((o), LUA_VNUMFLT) -#define ttisinteger(o) checktag((o), LUA_VNUMINT) - -#define nvalue(o) check_exp(ttisnumber(o), \ - (ttisinteger(o) ? cast_num(ivalue(o)) : fltvalue(o))) -#define fltvalue(o) check_exp(ttisfloat(o), val_(o).n) -#define ivalue(o) check_exp(ttisinteger(o), val_(o).i) - -#define fltvalueraw(v) ((v).n) -#define ivalueraw(v) ((v).i) - -#define setfltvalue(obj,x) \ - { TValue *io=(obj); val_(io).n=(x); settt_(io, LUA_VNUMFLT); } - -#define chgfltvalue(obj,x) \ - { TValue *io=(obj); lua_assert(ttisfloat(io)); val_(io).n=(x); } - -#define setivalue(obj,x) \ - { TValue *io=(obj); val_(io).i=(x); settt_(io, LUA_VNUMINT); } - -#define chgivalue(obj,x) \ - { TValue *io=(obj); lua_assert(ttisinteger(io)); val_(io).i=(x); } - -/* }================================================================== */ - - -/* -** {================================================================== -** Strings -** =================================================================== -*/ - -/* Variant tags for strings */ -#define LUA_VSHRSTR makevariant(LUA_TSTRING, 0) /* short strings */ -#define LUA_VLNGSTR makevariant(LUA_TSTRING, 1) /* long strings */ - -#define ttisstring(o) checktype((o), LUA_TSTRING) -#define ttisshrstring(o) checktag((o), ctb(LUA_VSHRSTR)) -#define ttislngstring(o) checktag((o), ctb(LUA_VLNGSTR)) - -#define tsvalueraw(v) (gco2ts((v).gc)) - -#define tsvalue(o) check_exp(ttisstring(o), gco2ts(val_(o).gc)) - -#define setsvalue(L,obj,x) \ - { TValue *io = (obj); TString *x_ = (x); \ - val_(io).gc = obj2gco(x_); settt_(io, ctb(x_->tt)); \ - checkliveness(L,io); } - -/* set a string to the stack */ -#define setsvalue2s(L,o,s) setsvalue(L,s2v(o),s) - -/* set a string to a new object */ -#define setsvalue2n setsvalue - - -/* Kinds of long strings (stored in 'shrlen') */ -#define LSTRREG -1 /* regular long string */ -#define LSTRFIX -2 /* fixed external long string */ -#define LSTRMEM -3 /* external long string with deallocation */ - - -/* -** Header for a string value. -*/ -typedef struct TString { - CommonHeader; - lu_byte extra; /* reserved words for short strings; "has hash" for longs */ - ls_byte shrlen; /* length for short strings, negative for long strings */ - unsigned int hash; - union { - size_t lnglen; /* length for long strings */ - struct TString *hnext; /* linked list for hash table */ - } u; - char *contents; /* pointer to content in long strings */ - lua_Alloc falloc; /* deallocation function for external strings */ - void *ud; /* user data for external strings */ -} TString; - - -#define strisshr(ts) ((ts)->shrlen >= 0) -#define isextstr(ts) (ttislngstring(ts) && tsvalue(ts)->shrlen != LSTRREG) - - -/* -** Get the actual string (array of bytes) from a 'TString'. (Generic -** version and specialized versions for long and short strings.) -*/ -#define rawgetshrstr(ts) (cast_charp(&(ts)->contents)) -#define getshrstr(ts) check_exp(strisshr(ts), rawgetshrstr(ts)) -#define getlngstr(ts) check_exp(!strisshr(ts), (ts)->contents) -#define getstr(ts) (strisshr(ts) ? rawgetshrstr(ts) : (ts)->contents) - - -/* get string length from 'TString *ts' */ -#define tsslen(ts) \ - (strisshr(ts) ? cast_sizet((ts)->shrlen) : (ts)->u.lnglen) - -/* -** Get string and length */ -#define getlstr(ts, len) \ - (strisshr(ts) \ - ? (cast_void((len) = cast_sizet((ts)->shrlen)), rawgetshrstr(ts)) \ - : (cast_void((len) = (ts)->u.lnglen), (ts)->contents)) - -/* }================================================================== */ - - -/* -** {================================================================== -** Userdata -** =================================================================== -*/ - - -/* -** Light userdata should be a variant of userdata, but for compatibility -** reasons they are also different types. -*/ -#define LUA_VLIGHTUSERDATA makevariant(LUA_TLIGHTUSERDATA, 0) - -#define LUA_VUSERDATA makevariant(LUA_TUSERDATA, 0) - -#define ttislightuserdata(o) checktag((o), LUA_VLIGHTUSERDATA) -#define ttisfulluserdata(o) checktag((o), ctb(LUA_VUSERDATA)) - -#define pvalue(o) check_exp(ttislightuserdata(o), val_(o).p) -#define uvalue(o) check_exp(ttisfulluserdata(o), gco2u(val_(o).gc)) - -#define pvalueraw(v) ((v).p) - -#define setpvalue(obj,x) \ - { TValue *io=(obj); val_(io).p=(x); settt_(io, LUA_VLIGHTUSERDATA); } - -#define setuvalue(L,obj,x) \ - { TValue *io = (obj); Udata *x_ = (x); \ - val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VUSERDATA)); \ - checkliveness(L,io); } - - -/* Ensures that addresses after this type are always fully aligned. */ -typedef union UValue { - TValue uv; - LUAI_MAXALIGN; /* ensures maximum alignment for udata bytes */ -} UValue; - - -/* -** Header for userdata with user values; -** memory area follows the end of this structure. -*/ -typedef struct Udata { - CommonHeader; - unsigned short nuvalue; /* number of user values */ - size_t len; /* number of bytes */ - struct Table *metatable; - GCObject *gclist; - UValue uv[1]; /* user values */ -} Udata; - - -/* -** Header for userdata with no user values. These userdata do not need -** to be gray during GC, and therefore do not need a 'gclist' field. -** To simplify, the code always use 'Udata' for both kinds of userdata, -** making sure it never accesses 'gclist' on userdata with no user values. -** This structure here is used only to compute the correct size for -** this representation. (The 'bindata' field in its end ensures correct -** alignment for binary data following this header.) -*/ -typedef struct Udata0 { - CommonHeader; - unsigned short nuvalue; /* number of user values */ - size_t len; /* number of bytes */ - struct Table *metatable; - union {LUAI_MAXALIGN;} bindata; -} Udata0; - - -/* compute the offset of the memory area of a userdata */ -#define udatamemoffset(nuv) \ - ((nuv) == 0 ? offsetof(Udata0, bindata) \ - : offsetof(Udata, uv) + (sizeof(UValue) * (nuv))) - -/* get the address of the memory block inside 'Udata' */ -#define getudatamem(u) (cast_charp(u) + udatamemoffset((u)->nuvalue)) - -/* compute the size of a userdata */ -#define sizeudata(nuv,nb) (udatamemoffset(nuv) + (nb)) - -/* }================================================================== */ - - -/* -** {================================================================== -** Prototypes -** =================================================================== -*/ - -#define LUA_VPROTO makevariant(LUA_TPROTO, 0) - - -typedef l_uint32 Instruction; - - -/* -** Description of an upvalue for function prototypes -*/ -typedef struct Upvaldesc { - TString *name; /* upvalue name (for debug information) */ - lu_byte instack; /* whether it is in stack (register) */ - lu_byte idx; /* index of upvalue (in stack or in outer function's list) */ - lu_byte kind; /* kind of corresponding variable */ -} Upvaldesc; - - -/* -** Description of a local variable for function prototypes -** (used for debug information) -*/ -typedef struct LocVar { - TString *varname; - int startpc; /* first point where variable is active */ - int endpc; /* first point where variable is dead */ -} LocVar; - - -/* -** Associates the absolute line source for a given instruction ('pc'). -** The array 'lineinfo' gives, for each instruction, the difference in -** lines from the previous instruction. When that difference does not -** fit into a byte, Lua saves the absolute line for that instruction. -** (Lua also saves the absolute line periodically, to speed up the -** computation of a line number: we can use binary search in the -** absolute-line array, but we must traverse the 'lineinfo' array -** linearly to compute a line.) -*/ -typedef struct AbsLineInfo { - int pc; - int line; -} AbsLineInfo; - - -/* -** Flags in Prototypes -*/ -#define PF_VAHID 1 /* function has hidden vararg arguments */ -#define PF_VATAB 2 /* function has vararg table */ -#define PF_FIXED 4 /* prototype has parts in fixed memory */ - -/* a vararg function either has hidden args. or a vararg table */ -#define isvararg(p) ((p)->flag & (PF_VAHID | PF_VATAB)) - -/* -** mark that a function needs a vararg table. (The flag PF_VAHID will -** be cleared later.) -*/ -#define needvatab(p) ((p)->flag |= PF_VATAB) - -/* -** Function Prototypes -*/ -typedef struct Proto { - CommonHeader; - lu_byte numparams; /* number of fixed (named) parameters */ - lu_byte flag; - lu_byte maxstacksize; /* number of registers needed by this function */ - int sizeupvalues; /* size of 'upvalues' */ - int sizek; /* size of 'k' */ - int sizecode; - int sizelineinfo; - int sizep; /* size of 'p' */ - int sizelocvars; - int sizeabslineinfo; /* size of 'abslineinfo' */ - int linedefined; /* debug information */ - int lastlinedefined; /* debug information */ - TValue *k; /* constants used by the function */ - Instruction *code; /* opcodes */ - struct Proto **p; /* functions defined inside the function */ - Upvaldesc *upvalues; /* upvalue information */ - ls_byte *lineinfo; /* information about source lines (debug information) */ - AbsLineInfo *abslineinfo; /* idem */ - LocVar *locvars; /* information about local variables (debug information) */ - TString *source; /* used for debug information */ - GCObject *gclist; -} Proto; - -/* }================================================================== */ - - -/* -** {================================================================== -** Functions -** =================================================================== -*/ - -#define LUA_VUPVAL makevariant(LUA_TUPVAL, 0) - - -/* Variant tags for functions */ -#define LUA_VLCL makevariant(LUA_TFUNCTION, 0) /* Lua closure */ -#define LUA_VLCF makevariant(LUA_TFUNCTION, 1) /* light C function */ -#define LUA_VCCL makevariant(LUA_TFUNCTION, 2) /* C closure */ - -#define ttisfunction(o) checktype(o, LUA_TFUNCTION) -#define ttisLclosure(o) checktag((o), ctb(LUA_VLCL)) -#define ttislcf(o) checktag((o), LUA_VLCF) -#define ttisCclosure(o) checktag((o), ctb(LUA_VCCL)) -#define ttisclosure(o) (ttisLclosure(o) || ttisCclosure(o)) - - -#define isLfunction(o) ttisLclosure(o) - -#define clvalue(o) check_exp(ttisclosure(o), gco2cl(val_(o).gc)) -#define clLvalue(o) check_exp(ttisLclosure(o), gco2lcl(val_(o).gc)) -#define fvalue(o) check_exp(ttislcf(o), val_(o).f) -#define clCvalue(o) check_exp(ttisCclosure(o), gco2ccl(val_(o).gc)) - -#define fvalueraw(v) ((v).f) - -#define setclLvalue(L,obj,x) \ - { TValue *io = (obj); LClosure *x_ = (x); \ - val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VLCL)); \ - checkliveness(L,io); } - -#define setclLvalue2s(L,o,cl) setclLvalue(L,s2v(o),cl) - -#define setfvalue(obj,x) \ - { TValue *io=(obj); val_(io).f=(x); settt_(io, LUA_VLCF); } - -#define setclCvalue(L,obj,x) \ - { TValue *io = (obj); CClosure *x_ = (x); \ - val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VCCL)); \ - checkliveness(L,io); } - - -/* -** Upvalues for Lua closures -*/ -typedef struct UpVal { - CommonHeader; - union { - TValue *p; /* points to stack or to its own value */ - ptrdiff_t offset; /* used while the stack is being reallocated */ - } v; - union { - struct { /* (when open) */ - struct UpVal *next; /* linked list */ - struct UpVal **previous; - } open; - TValue value; /* the value (when closed) */ - } u; -} UpVal; - - - -#define ClosureHeader \ - CommonHeader; lu_byte nupvalues; GCObject *gclist - -typedef struct CClosure { - ClosureHeader; - lua_CFunction f; - TValue upvalue[1]; /* list of upvalues */ -} CClosure; - - -typedef struct LClosure { - ClosureHeader; - struct Proto *p; - UpVal *upvals[1]; /* list of upvalues */ -} LClosure; - - -typedef union Closure { - CClosure c; - LClosure l; -} Closure; - - -#define getproto(o) (clLvalue(o)->p) - -/* }================================================================== */ - - -/* -** {================================================================== -** Tables -** =================================================================== -*/ - -#define LUA_VTABLE makevariant(LUA_TTABLE, 0) - -#define ttistable(o) checktag((o), ctb(LUA_VTABLE)) - -#define hvalue(o) check_exp(ttistable(o), gco2t(val_(o).gc)) - -#define sethvalue(L,obj,x) \ - { TValue *io = (obj); Table *x_ = (x); \ - val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VTABLE)); \ - checkliveness(L,io); } - -#define sethvalue2s(L,o,h) sethvalue(L,s2v(o),h) - - -/* -** Nodes for Hash tables: A pack of two TValue's (key-value pairs) -** plus a 'next' field to link colliding entries. The distribution -** of the key's fields ('key_tt' and 'key_val') not forming a proper -** 'TValue' allows for a smaller size for 'Node' both in 4-byte -** and 8-byte alignments. -*/ -typedef union Node { - struct NodeKey { - TValuefields; /* fields for value */ - lu_byte key_tt; /* key type */ - int next; /* for chaining */ - Value key_val; /* key value */ - } u; - TValue i_val; /* direct access to node's value as a proper 'TValue' */ -} Node; - - -/* copy a value into a key */ -#define setnodekey(node,obj) \ - { Node *n_=(node); const TValue *io_=(obj); \ - n_->u.key_val = io_->value_; n_->u.key_tt = io_->tt_; } - - -/* copy a value from a key */ -#define getnodekey(L,obj,node) \ - { TValue *io_=(obj); const Node *n_=(node); \ - io_->value_ = n_->u.key_val; io_->tt_ = n_->u.key_tt; \ - checkliveness(L,io_); } - - - -typedef struct Table { - CommonHeader; - lu_byte flags; /* 1<

u.key_tt) -#define keyval(node) ((node)->u.key_val) - -#define keyisnil(node) (keytt(node) == LUA_TNIL) -#define keyisinteger(node) (keytt(node) == LUA_VNUMINT) -#define keyival(node) (keyval(node).i) -#define keyisshrstr(node) (keytt(node) == ctb(LUA_VSHRSTR)) -#define keystrval(node) (gco2ts(keyval(node).gc)) - -#define setnilkey(node) (keytt(node) = LUA_TNIL) - -#define keyiscollectable(n) (keytt(n) & BIT_ISCOLLECTABLE) - -#define gckey(n) (keyval(n).gc) -#define gckeyN(n) (keyiscollectable(n) ? gckey(n) : NULL) - - -/* -** Dead keys in tables have the tag DEADKEY but keep their original -** gcvalue. This distinguishes them from regular keys but allows them to -** be found when searched in a special way. ('next' needs that to find -** keys removed from a table during a traversal.) -*/ -#define setdeadkey(node) (keytt(node) = LUA_TDEADKEY) -#define keyisdead(node) (keytt(node) == LUA_TDEADKEY) - -/* }================================================================== */ - - - -/* -** 'module' operation for hashing (size is always a power of 2) -*/ -#define lmod(s,size) \ - (check_exp((size&(size-1))==0, (cast_uint(s) & cast_uint((size)-1)))) - - -#define twoto(x) (1u<<(x)) -#define sizenode(t) (twoto((t)->lsizenode)) - - -/* size of buffer for 'luaO_utf8esc' function */ -#define UTF8BUFFSZ 8 - - -/* macro to call 'luaO_pushvfstring' correctly */ -#define pushvfstring(L, argp, fmt, msg) \ - { va_start(argp, fmt); \ - msg = luaO_pushvfstring(L, fmt, argp); \ - va_end(argp); \ - if (msg == NULL) luaD_throw(L, LUA_ERRMEM); /* only after 'va_end' */ } - - -LUAI_FUNC int luaO_utf8esc (char *buff, l_uint32 x); -LUAI_FUNC lu_byte luaO_ceillog2 (unsigned int x); -LUAI_FUNC lu_byte luaO_codeparam (unsigned int p); -LUAI_FUNC l_mem luaO_applyparam (lu_byte p, l_mem x); - -LUAI_FUNC int luaO_rawarith (lua_State *L, int op, const TValue *p1, - const TValue *p2, TValue *res); -LUAI_FUNC void luaO_arith (lua_State *L, int op, const TValue *p1, - const TValue *p2, StkId res); -LUAI_FUNC size_t luaO_str2num (const char *s, TValue *o); -LUAI_FUNC unsigned luaO_tostringbuff (const TValue *obj, char *buff); -LUAI_FUNC lu_byte luaO_hexavalue (int c); -LUAI_FUNC void luaO_tostring (lua_State *L, TValue *obj); -LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt, - va_list argp); -LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...); -LUAI_FUNC void luaO_chunkid (char *out, const char *source, size_t srclen); - - -#endif - diff --git a/lib/lua/lopcodes.c b/lib/lua/lopcodes.c deleted file mode 100644 index bb1a416..0000000 --- a/lib/lua/lopcodes.c +++ /dev/null @@ -1,131 +0,0 @@ -/* -** $Id: lopcodes.c $ -** Opcodes for Lua virtual machine -** See Copyright Notice in lua.h -*/ - -#define lopcodes_c -#define LUA_CORE - -#include "lprefix.h" - - -#include "lopcodes.h" - - -#define opmode(mm,ot,it,t,a,m) \ - (((mm) << 7) | ((ot) << 6) | ((it) << 5) | ((t) << 4) | ((a) << 3) | (m)) - - -/* ORDER OP */ - -LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = { -/* MM OT IT T A mode opcode */ - opmode(0, 0, 0, 0, 1, iABC) /* OP_MOVE */ - ,opmode(0, 0, 0, 0, 1, iAsBx) /* OP_LOADI */ - ,opmode(0, 0, 0, 0, 1, iAsBx) /* OP_LOADF */ - ,opmode(0, 0, 0, 0, 1, iABx) /* OP_LOADK */ - ,opmode(0, 0, 0, 0, 1, iABx) /* OP_LOADKX */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_LOADFALSE */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_LFALSESKIP */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_LOADTRUE */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_LOADNIL */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_GETUPVAL */ - ,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETUPVAL */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_GETTABUP */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_GETTABLE */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_GETI */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_GETFIELD */ - ,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETTABUP */ - ,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETTABLE */ - ,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETI */ - ,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETFIELD */ - ,opmode(0, 0, 0, 0, 1, ivABC) /* OP_NEWTABLE */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_SELF */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_ADDI */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_ADDK */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_SUBK */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_MULK */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_MODK */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_POWK */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_DIVK */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_IDIVK */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_BANDK */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_BORK */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_BXORK */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_SHLI */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_SHRI */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_ADD */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_SUB */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_MUL */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_MOD */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_POW */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_DIV */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_IDIV */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_BAND */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_BOR */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_BXOR */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_SHL */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_SHR */ - ,opmode(1, 0, 0, 0, 0, iABC) /* OP_MMBIN */ - ,opmode(1, 0, 0, 0, 0, iABC) /* OP_MMBINI */ - ,opmode(1, 0, 0, 0, 0, iABC) /* OP_MMBINK */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_UNM */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_BNOT */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_NOT */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_LEN */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_CONCAT */ - ,opmode(0, 0, 0, 0, 0, iABC) /* OP_CLOSE */ - ,opmode(0, 0, 0, 0, 0, iABC) /* OP_TBC */ - ,opmode(0, 0, 0, 0, 0, isJ) /* OP_JMP */ - ,opmode(0, 0, 0, 1, 0, iABC) /* OP_EQ */ - ,opmode(0, 0, 0, 1, 0, iABC) /* OP_LT */ - ,opmode(0, 0, 0, 1, 0, iABC) /* OP_LE */ - ,opmode(0, 0, 0, 1, 0, iABC) /* OP_EQK */ - ,opmode(0, 0, 0, 1, 0, iABC) /* OP_EQI */ - ,opmode(0, 0, 0, 1, 0, iABC) /* OP_LTI */ - ,opmode(0, 0, 0, 1, 0, iABC) /* OP_LEI */ - ,opmode(0, 0, 0, 1, 0, iABC) /* OP_GTI */ - ,opmode(0, 0, 0, 1, 0, iABC) /* OP_GEI */ - ,opmode(0, 0, 0, 1, 0, iABC) /* OP_TEST */ - ,opmode(0, 0, 0, 1, 1, iABC) /* OP_TESTSET */ - ,opmode(0, 1, 1, 0, 1, iABC) /* OP_CALL */ - ,opmode(0, 1, 1, 0, 1, iABC) /* OP_TAILCALL */ - ,opmode(0, 0, 1, 0, 0, iABC) /* OP_RETURN */ - ,opmode(0, 0, 0, 0, 0, iABC) /* OP_RETURN0 */ - ,opmode(0, 0, 0, 0, 0, iABC) /* OP_RETURN1 */ - ,opmode(0, 0, 0, 0, 1, iABx) /* OP_FORLOOP */ - ,opmode(0, 0, 0, 0, 1, iABx) /* OP_FORPREP */ - ,opmode(0, 0, 0, 0, 0, iABx) /* OP_TFORPREP */ - ,opmode(0, 0, 0, 0, 0, iABC) /* OP_TFORCALL */ - ,opmode(0, 0, 0, 0, 1, iABx) /* OP_TFORLOOP */ - ,opmode(0, 0, 1, 0, 0, ivABC) /* OP_SETLIST */ - ,opmode(0, 0, 0, 0, 1, iABx) /* OP_CLOSURE */ - ,opmode(0, 1, 0, 0, 1, iABC) /* OP_VARARG */ - ,opmode(0, 0, 0, 0, 1, iABC) /* OP_GETVARG */ - ,opmode(0, 0, 0, 0, 0, iABx) /* OP_ERRNNIL */ - ,opmode(0, 0, 0, 0, 0, iABC) /* OP_VARARGPREP */ - ,opmode(0, 0, 0, 0, 0, iAx) /* OP_EXTRAARG */ -}; - - -#define testITMode(m) (luaP_opmodes[m] & (1 << 5)) - - -/* -** Check whether instruction uses top. That happens for OP_VARARGPREP -** and for instructions that use multiple values set by the previous -** instruction. -*/ -int luaP_isIT (Instruction i) { - OpCode op = GET_OPCODE(i); - switch (op) { - case OP_SETLIST: - return GETARG_vB(i) == 0; - case OP_VARARGPREP: - return 1; - default: - return testITMode(GET_OPCODE(i)) && GETARG_B(i) == 0; - } -} - diff --git a/lib/lua/lopcodes.h b/lib/lua/lopcodes.h deleted file mode 100644 index 86cff06..0000000 --- a/lib/lua/lopcodes.h +++ /dev/null @@ -1,444 +0,0 @@ -/* -** $Id: lopcodes.h $ -** Opcodes for Lua virtual machine -** See Copyright Notice in lua.h -*/ - -#ifndef lopcodes_h -#define lopcodes_h - -#include "llimits.h" -#include "lobject.h" - - -/*=========================================================================== - We assume that instructions are unsigned 32-bit integers. - All instructions have an opcode in the first 7 bits. - Instructions can have the following formats: - - 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 - 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 -iABC C(8) | B(8) |k| A(8) | Op(7) | -ivABC vC(10) | vB(6) |k| A(8) | Op(7) | -iABx Bx(17) | A(8) | Op(7) | -iAsBx sBx (signed)(17) | A(8) | Op(7) | -iAx Ax(25) | Op(7) | -isJ sJ (signed)(25) | Op(7) | - - ('v' stands for "variant", 's' for "signed", 'x' for "extended".) - A signed argument is represented in excess K: The represented value is - the written unsigned value minus K, where K is half (rounded down) the - maximum value for the corresponding unsigned argument. -===========================================================================*/ - - -/* basic instruction formats */ -enum OpMode {iABC, ivABC, iABx, iAsBx, iAx, isJ}; - - -/* -** size and position of opcode arguments. -*/ -#define SIZE_C 8 -#define SIZE_vC 10 -#define SIZE_B 8 -#define SIZE_vB 6 -#define SIZE_Bx (SIZE_C + SIZE_B + 1) -#define SIZE_A 8 -#define SIZE_Ax (SIZE_Bx + SIZE_A) -#define SIZE_sJ (SIZE_Bx + SIZE_A) - -#define SIZE_OP 7 - -#define POS_OP 0 - -#define POS_A (POS_OP + SIZE_OP) -#define POS_k (POS_A + SIZE_A) -#define POS_B (POS_k + 1) -#define POS_vB (POS_k + 1) -#define POS_C (POS_B + SIZE_B) -#define POS_vC (POS_vB + SIZE_vB) - -#define POS_Bx POS_k - -#define POS_Ax POS_A - -#define POS_sJ POS_A - - -/* -** limits for opcode arguments. -** we use (signed) 'int' to manipulate most arguments, -** so they must fit in ints. -*/ - -/* -** Check whether type 'int' has at least 'b' + 1 bits. -** 'b' < 32; +1 for the sign bit. -*/ -#define L_INTHASBITS(b) ((UINT_MAX >> (b)) >= 1) - - -#if L_INTHASBITS(SIZE_Bx) -#define MAXARG_Bx ((1<>1) /* 'sBx' is signed */ - - -#if L_INTHASBITS(SIZE_Ax) -#define MAXARG_Ax ((1<> 1) - - -#define MAXARG_A ((1<> 1) - -#define int2sC(i) ((i) + OFFSET_sC) -#define sC2int(i) ((i) - OFFSET_sC) - - -/* creates a mask with 'n' 1 bits at position 'p' */ -#define MASK1(n,p) ((~((~(Instruction)0)<<(n)))<<(p)) - -/* creates a mask with 'n' 0 bits at position 'p' */ -#define MASK0(n,p) (~MASK1(n,p)) - -/* -** the following macros help to manipulate instructions -*/ - -#define GET_OPCODE(i) (cast(OpCode, ((i)>>POS_OP) & MASK1(SIZE_OP,0))) -#define SET_OPCODE(i,o) ((i) = (((i)&MASK0(SIZE_OP,POS_OP)) | \ - ((cast_Inst(o)<>(pos)) & MASK1(size,0))) -#define setarg(i,v,pos,size) ((i) = (((i)&MASK0(size,pos)) | \ - ((cast_Inst(v)<> sC */ - -OP_ADD,/* A B C R[A] := R[B] + R[C] */ -OP_SUB,/* A B C R[A] := R[B] - R[C] */ -OP_MUL,/* A B C R[A] := R[B] * R[C] */ -OP_MOD,/* A B C R[A] := R[B] % R[C] */ -OP_POW,/* A B C R[A] := R[B] ^ R[C] */ -OP_DIV,/* A B C R[A] := R[B] / R[C] */ -OP_IDIV,/* A B C R[A] := R[B] // R[C] */ - -OP_BAND,/* A B C R[A] := R[B] & R[C] */ -OP_BOR,/* A B C R[A] := R[B] | R[C] */ -OP_BXOR,/* A B C R[A] := R[B] ~ R[C] */ -OP_SHL,/* A B C R[A] := R[B] << R[C] */ -OP_SHR,/* A B C R[A] := R[B] >> R[C] */ - -OP_MMBIN,/* A B C call C metamethod over R[A] and R[B] */ -OP_MMBINI,/* A sB C k call C metamethod over R[A] and sB */ -OP_MMBINK,/* A B C k call C metamethod over R[A] and K[B] */ - -OP_UNM,/* A B R[A] := -R[B] */ -OP_BNOT,/* A B R[A] := ~R[B] */ -OP_NOT,/* A B R[A] := not R[B] */ -OP_LEN,/* A B R[A] := #R[B] (length operator) */ - -OP_CONCAT,/* A B R[A] := R[A].. ... ..R[A + B - 1] */ - -OP_CLOSE,/* A close all upvalues >= R[A] */ -OP_TBC,/* A mark variable A "to be closed" */ -OP_JMP,/* sJ pc += sJ */ -OP_EQ,/* A B k if ((R[A] == R[B]) ~= k) then pc++ */ -OP_LT,/* A B k if ((R[A] < R[B]) ~= k) then pc++ */ -OP_LE,/* A B k if ((R[A] <= R[B]) ~= k) then pc++ */ - -OP_EQK,/* A B k if ((R[A] == K[B]) ~= k) then pc++ */ -OP_EQI,/* A sB k if ((R[A] == sB) ~= k) then pc++ */ -OP_LTI,/* A sB k if ((R[A] < sB) ~= k) then pc++ */ -OP_LEI,/* A sB k if ((R[A] <= sB) ~= k) then pc++ */ -OP_GTI,/* A sB k if ((R[A] > sB) ~= k) then pc++ */ -OP_GEI,/* A sB k if ((R[A] >= sB) ~= k) then pc++ */ - -OP_TEST,/* A k if (not R[A] == k) then pc++ */ -OP_TESTSET,/* A B k if (not R[B] == k) then pc++ else R[A] := R[B] */ - -OP_CALL,/* A B C R[A], ... ,R[A+C-2] := R[A](R[A+1], ... ,R[A+B-1]) */ -OP_TAILCALL,/* A B C k return R[A](R[A+1], ... ,R[A+B-1]) */ - -OP_RETURN,/* A B C k return R[A], ... ,R[A+B-2] */ -OP_RETURN0,/* return */ -OP_RETURN1,/* A return R[A] */ - -OP_FORLOOP,/* A Bx update counters; if loop continues then pc-=Bx; */ -OP_FORPREP,/* A Bx ; - if not to run then pc+=Bx+1; */ - -OP_TFORPREP,/* A Bx create upvalue for R[A + 3]; pc+=Bx */ -OP_TFORCALL,/* A C R[A+4], ... ,R[A+3+C] := R[A](R[A+1], R[A+2]); */ -OP_TFORLOOP,/* A Bx if R[A+2] ~= nil then { R[A]=R[A+2]; pc -= Bx } */ - -OP_SETLIST,/* A vB vC k R[A][vC+i] := R[A+i], 1 <= i <= vB */ - -OP_CLOSURE,/* A Bx R[A] := closure(KPROTO[Bx]) */ - -OP_VARARG,/* A B C k R[A], ..., R[A+C-2] = varargs */ - -OP_GETVARG, /* A B C R[A] := R[B][R[C]], R[B] is vararg parameter */ - -OP_ERRNNIL,/* A Bx raise error if R[A] ~= nil (K[Bx - 1] is global name)*/ - -OP_VARARGPREP,/* (adjust varargs) */ - -OP_EXTRAARG/* Ax extra (larger) argument for previous opcode */ -} OpCode; - - -#define NUM_OPCODES ((int)(OP_EXTRAARG) + 1) - - - -/*=========================================================================== - Notes: - - (*) Opcode OP_LFALSESKIP is used to convert a condition to a boolean - value, in a code equivalent to (not cond ? false : true). (It - produces false and skips the next instruction producing true.) - - (*) Opcodes OP_MMBIN and variants follow each arithmetic and - bitwise opcode. If the operation succeeds, it skips this next - opcode. Otherwise, this opcode calls the corresponding metamethod. - - (*) Opcode OP_TESTSET is used in short-circuit expressions that need - both to jump and to produce a value, such as (a = b or c). - - (*) In OP_CALL, if (B == 0) then B = top - A. If (C == 0), then - 'top' is set to last_result+1, so next open instruction (OP_CALL, - OP_RETURN*, OP_SETLIST) may use 'top'. - - (*) In OP_VARARG, if (C == 0) then use actual number of varargs and - set top (like in OP_CALL with C == 0). 'k' means function has a - vararg table, which is in R[B]. - - (*) In OP_RETURN, if (B == 0) then return up to 'top'. - - (*) In OP_LOADKX and OP_NEWTABLE, the next instruction is always - OP_EXTRAARG. - - (*) In OP_SETLIST, if (B == 0) then real B = 'top'; if k, then - real C = EXTRAARG _ C (the bits of EXTRAARG concatenated with the - bits of C). - - (*) In OP_NEWTABLE, vB is log2 of the hash size (which is always a - power of 2) plus 1, or zero for size zero. If not k, the array size - is vC. Otherwise, the array size is EXTRAARG _ vC. - - (*) In OP_ERRNNIL, (Bx == 0) means index of global name doesn't - fit in Bx. (So, that name is not available for the error message.) - - (*) For comparisons, k specifies what condition the test should accept - (true or false). - - (*) In OP_MMBINI/OP_MMBINK, k means the arguments were flipped - (the constant is the first operand). - - (*) All comparison and test instructions assume that the instruction - being skipped (pc++) is a jump. - - (*) In instructions OP_RETURN/OP_TAILCALL, 'k' specifies that the - function builds upvalues, which may need to be closed. C > 0 means - the function has hidden vararg arguments, so that its 'func' must be - corrected before returning; in this case, (C - 1) is its number of - fixed parameters. - - (*) In comparisons with an immediate operand, C signals whether the - original operand was a float. (It must be corrected in case of - metamethods.) - -===========================================================================*/ - - -/* -** masks for instruction properties. The format is: -** bits 0-2: op mode -** bit 3: instruction set register A -** bit 4: operator is a test (next instruction must be a jump) -** bit 5: used by 'luaP_isIT' -** bit 6: used by 'luaP_isOT' -** bit 7: instruction is an MM instruction (call a metamethod) -*/ - -LUAI_DDEC(const lu_byte luaP_opmodes[NUM_OPCODES];) - -#define getOpMode(m) (cast(enum OpMode, luaP_opmodes[m] & 7)) -#define testAMode(m) (luaP_opmodes[m] & (1 << 3)) -#define testTMode(m) (luaP_opmodes[m] & (1 << 4)) -#define testMMMode(m) (luaP_opmodes[m] & (1 << 7)) - - -/* Check whether instruction sets top for next instruction, that is, -** it results in multiple values. Used only for tests. -*/ -#define luaP_isOT(i) \ - (GET_OPCODE(i) == OP_TAILCALL || \ - ((luaP_opmodes[GET_OPCODE(i)] & (1 << 6)) && GETARG_C(i) == 0)) - - -LUAI_FUNC int luaP_isIT (Instruction i); - - -#endif diff --git a/lib/lua/lopnames.h b/lib/lua/lopnames.h deleted file mode 100644 index 0554a2e..0000000 --- a/lib/lua/lopnames.h +++ /dev/null @@ -1,105 +0,0 @@ -/* -** $Id: lopnames.h $ -** Opcode names -** See Copyright Notice in lua.h -*/ - -#if !defined(lopnames_h) -#define lopnames_h - -#include - - -/* ORDER OP */ - -static const char *const opnames[] = { - "MOVE", - "LOADI", - "LOADF", - "LOADK", - "LOADKX", - "LOADFALSE", - "LFALSESKIP", - "LOADTRUE", - "LOADNIL", - "GETUPVAL", - "SETUPVAL", - "GETTABUP", - "GETTABLE", - "GETI", - "GETFIELD", - "SETTABUP", - "SETTABLE", - "SETI", - "SETFIELD", - "NEWTABLE", - "SELF", - "ADDI", - "ADDK", - "SUBK", - "MULK", - "MODK", - "POWK", - "DIVK", - "IDIVK", - "BANDK", - "BORK", - "BXORK", - "SHLI", - "SHRI", - "ADD", - "SUB", - "MUL", - "MOD", - "POW", - "DIV", - "IDIV", - "BAND", - "BOR", - "BXOR", - "SHL", - "SHR", - "MMBIN", - "MMBINI", - "MMBINK", - "UNM", - "BNOT", - "NOT", - "LEN", - "CONCAT", - "CLOSE", - "TBC", - "JMP", - "EQ", - "LT", - "LE", - "EQK", - "EQI", - "LTI", - "LEI", - "GTI", - "GEI", - "TEST", - "TESTSET", - "CALL", - "TAILCALL", - "RETURN", - "RETURN0", - "RETURN1", - "FORLOOP", - "FORPREP", - "TFORPREP", - "TFORCALL", - "TFORLOOP", - "SETLIST", - "CLOSURE", - "VARARG", - "GETVARG", - "ERRNNIL", - "VARARGPREP", - "EXTRAARG", - NULL -}; - -#endif - diff --git a/lib/lua/loslib.c b/lib/lua/loslib.c deleted file mode 100644 index b7a2b0d..0000000 --- a/lib/lua/loslib.c +++ /dev/null @@ -1,432 +0,0 @@ -/* -** $Id: loslib.c $ -** Standard Operating System library -** See Copyright Notice in lua.h -*/ - -#define loslib_c -#define LUA_LIB - -#include "lprefix.h" - - -#include -#include -#include -#include -#include - -#include "lua.h" - -#include "lauxlib.h" -#include "lualib.h" -#include "llimits.h" - - -/* -** {================================================================== -** List of valid conversion specifiers for the 'strftime' function; -** options are grouped by length; group of length 2 start with '||'. -** =================================================================== -*/ -#if !defined(LUA_STRFTIMEOPTIONS) /* { */ - -#if defined(LUA_USE_WINDOWS) -#define LUA_STRFTIMEOPTIONS "aAbBcdHIjmMpSUwWxXyYzZ%" \ - "||" "#c#x#d#H#I#j#m#M#S#U#w#W#y#Y" /* two-char options */ -#elif defined(LUA_USE_C89) /* C89 (only 1-char options) */ -#define LUA_STRFTIMEOPTIONS "aAbBcdHIjmMpSUwWxXyYZ%" -#else /* C99 specification */ -#define LUA_STRFTIMEOPTIONS "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%" \ - "||" "EcECExEXEyEY" "OdOeOHOIOmOMOSOuOUOVOwOWOy" /* two-char options */ -#endif - -#endif /* } */ -/* }================================================================== */ - - -/* -** {================================================================== -** Configuration for time-related stuff -** =================================================================== -*/ - -/* -** type to represent time_t in Lua -*/ -#if !defined(LUA_NUMTIME) /* { */ - -#define l_timet lua_Integer -#define l_pushtime(L,t) lua_pushinteger(L,(lua_Integer)(t)) -#define l_gettime(L,arg) luaL_checkinteger(L, arg) - -#else /* }{ */ - -#define l_timet lua_Number -#define l_pushtime(L,t) lua_pushnumber(L,(lua_Number)(t)) -#define l_gettime(L,arg) luaL_checknumber(L, arg) - -#endif /* } */ - - -#if !defined(l_gmtime) /* { */ -/* -** By default, Lua uses gmtime/localtime, except when POSIX is available, -** where it uses gmtime_r/localtime_r -*/ - -#if defined(LUA_USE_POSIX) /* { */ - -#define l_gmtime(t,r) gmtime_r(t,r) -#define l_localtime(t,r) localtime_r(t,r) - -#else /* }{ */ - -/* ISO C definitions */ -#define l_gmtime(t,r) ((void)(r)->tm_sec, gmtime(t)) -#define l_localtime(t,r) ((void)(r)->tm_sec, localtime(t)) - -#endif /* } */ - -#endif /* } */ - -/* }================================================================== */ - - -/* -** {================================================================== -** Configuration for 'tmpnam': -** By default, Lua uses tmpnam except when POSIX is available, where -** it uses mkstemp. -** =================================================================== -*/ -#if !defined(lua_tmpnam) /* { */ - -#if defined(LUA_USE_POSIX) /* { */ - -#include - -#define LUA_TMPNAMBUFSIZE 32 - -#if !defined(LUA_TMPNAMTEMPLATE) -#define LUA_TMPNAMTEMPLATE "/tmp/lua_XXXXXX" -#endif - -#define lua_tmpnam(b,e) { \ - strcpy(b, LUA_TMPNAMTEMPLATE); \ - e = mkstemp(b); \ - if (e != -1) close(e); \ - e = (e == -1); } - -#else /* }{ */ - -/* ISO C definitions */ -#define LUA_TMPNAMBUFSIZE L_tmpnam -#define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); } - -#endif /* } */ - -#endif /* } */ -/* }================================================================== */ - - -#if !defined(l_system) -#if defined(LUA_USE_IOS) -/* Despite claiming to be ISO C, iOS does not implement 'system'. */ -#define l_system(cmd) ((cmd) == NULL ? 0 : -1) -#else -#define l_system(cmd) system(cmd) /* default definition */ -#endif -#endif - - -static int os_execute (lua_State *L) { - const char *cmd = luaL_optstring(L, 1, NULL); - int stat; - errno = 0; - stat = l_system(cmd); - if (cmd != NULL) - return luaL_execresult(L, stat); - else { - lua_pushboolean(L, stat); /* true if there is a shell */ - return 1; - } -} - - -static int os_remove (lua_State *L) { - const char *filename = luaL_checkstring(L, 1); - errno = 0; - return luaL_fileresult(L, remove(filename) == 0, filename); -} - - -static int os_rename (lua_State *L) { - const char *fromname = luaL_checkstring(L, 1); - const char *toname = luaL_checkstring(L, 2); - errno = 0; - return luaL_fileresult(L, rename(fromname, toname) == 0, NULL); -} - - -static int os_tmpname (lua_State *L) { - char buff[LUA_TMPNAMBUFSIZE]; - int err; - lua_tmpnam(buff, err); - if (l_unlikely(err)) - return luaL_error(L, "unable to generate a unique filename"); - lua_pushstring(L, buff); - return 1; -} - - -static int os_getenv (lua_State *L) { - lua_pushstring(L, getenv(luaL_checkstring(L, 1))); /* if NULL push nil */ - return 1; -} - - -static int os_clock (lua_State *L) { - lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC); - return 1; -} - - -/* -** {====================================================== -** Time/Date operations -** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S, -** wday=%w+1, yday=%j, isdst=? } -** ======================================================= -*/ - -/* -** About the overflow check: an overflow cannot occur when time -** is represented by a lua_Integer, because either lua_Integer is -** large enough to represent all int fields or it is not large enough -** to represent a time that cause a field to overflow. However, if -** times are represented as doubles and lua_Integer is int, then the -** time 0x1.e1853b0d184f6p+55 would cause an overflow when adding 1900 -** to compute the year. -*/ -static void setfield (lua_State *L, const char *key, int value, int delta) { - #if (defined(LUA_NUMTIME) && LUA_MAXINTEGER <= INT_MAX) - if (l_unlikely(value > LUA_MAXINTEGER - delta)) - luaL_error(L, "field '%s' is out-of-bound", key); - #endif - lua_pushinteger(L, (lua_Integer)value + delta); - lua_setfield(L, -2, key); -} - - -static void setboolfield (lua_State *L, const char *key, int value) { - if (value < 0) /* undefined? */ - return; /* does not set field */ - lua_pushboolean(L, value); - lua_setfield(L, -2, key); -} - - -/* -** Set all fields from structure 'tm' in the table on top of the stack -*/ -static void setallfields (lua_State *L, struct tm *stm) { - setfield(L, "year", stm->tm_year, 1900); - setfield(L, "month", stm->tm_mon, 1); - setfield(L, "day", stm->tm_mday, 0); - setfield(L, "hour", stm->tm_hour, 0); - setfield(L, "min", stm->tm_min, 0); - setfield(L, "sec", stm->tm_sec, 0); - setfield(L, "yday", stm->tm_yday, 1); - setfield(L, "wday", stm->tm_wday, 1); - setboolfield(L, "isdst", stm->tm_isdst); -} - - -static int getboolfield (lua_State *L, const char *key) { - int res; - res = (lua_getfield(L, -1, key) == LUA_TNIL) ? -1 : lua_toboolean(L, -1); - lua_pop(L, 1); - return res; -} - - -static int getfield (lua_State *L, const char *key, int d, int delta) { - int isnum; - int t = lua_getfield(L, -1, key); /* get field and its type */ - lua_Integer res = lua_tointegerx(L, -1, &isnum); - if (!isnum) { /* field is not an integer? */ - if (l_unlikely(t != LUA_TNIL)) /* some other value? */ - return luaL_error(L, "field '%s' is not an integer", key); - else if (l_unlikely(d < 0)) /* absent field; no default? */ - return luaL_error(L, "field '%s' missing in date table", key); - res = d; - } - else { - if (!(res >= 0 ? res - delta <= INT_MAX : INT_MIN + delta <= res)) - return luaL_error(L, "field '%s' is out-of-bound", key); - res -= delta; - } - lua_pop(L, 1); - return (int)res; -} - - -static const char *checkoption (lua_State *L, const char *conv, - size_t convlen, char *buff) { - const char *option = LUA_STRFTIMEOPTIONS; - unsigned oplen = 1; /* length of options being checked */ - for (; *option != '\0' && oplen <= convlen; option += oplen) { - if (*option == '|') /* next block? */ - oplen++; /* will check options with next length (+1) */ - else if (memcmp(conv, option, oplen) == 0) { /* match? */ - memcpy(buff, conv, oplen); /* copy valid option to buffer */ - buff[oplen] = '\0'; - return conv + oplen; /* return next item */ - } - } - luaL_argerror(L, 1, - lua_pushfstring(L, "invalid conversion specifier '%%%s'", conv)); - return conv; /* to avoid warnings */ -} - - -static time_t l_checktime (lua_State *L, int arg) { - l_timet t = l_gettime(L, arg); - luaL_argcheck(L, (time_t)t == t, arg, "time out-of-bounds"); - return (time_t)t; -} - - -/* maximum size for an individual 'strftime' item */ -#define SIZETIMEFMT 250 - - -static int os_date (lua_State *L) { - size_t slen; - const char *s = luaL_optlstring(L, 1, "%c", &slen); - time_t t = luaL_opt(L, l_checktime, 2, time(NULL)); - const char *se = s + slen; /* 's' end */ - struct tm tmr, *stm; - if (*s == '!') { /* UTC? */ - stm = l_gmtime(&t, &tmr); - s++; /* skip '!' */ - } - else - stm = l_localtime(&t, &tmr); - if (stm == NULL) /* invalid date? */ - return luaL_error(L, - "date result cannot be represented in this installation"); - if (strcmp(s, "*t") == 0) { - lua_createtable(L, 0, 9); /* 9 = number of fields */ - setallfields(L, stm); - } - else { - char cc[4]; /* buffer for individual conversion specifiers */ - luaL_Buffer b; - cc[0] = '%'; - luaL_buffinit(L, &b); - while (s < se) { - if (*s != '%') /* not a conversion specifier? */ - luaL_addchar(&b, *s++); - else { - size_t reslen; - char *buff = luaL_prepbuffsize(&b, SIZETIMEFMT); - s++; /* skip '%' */ - /* copy specifier to 'cc' */ - s = checkoption(L, s, ct_diff2sz(se - s), cc + 1); - reslen = strftime(buff, SIZETIMEFMT, cc, stm); - luaL_addsize(&b, reslen); - } - } - luaL_pushresult(&b); - } - return 1; -} - - -static int os_time (lua_State *L) { - time_t t; - if (lua_isnoneornil(L, 1)) /* called without args? */ - t = time(NULL); /* get current time */ - else { - struct tm ts; - luaL_checktype(L, 1, LUA_TTABLE); - lua_settop(L, 1); /* make sure table is at the top */ - ts.tm_year = getfield(L, "year", -1, 1900); - ts.tm_mon = getfield(L, "month", -1, 1); - ts.tm_mday = getfield(L, "day", -1, 0); - ts.tm_hour = getfield(L, "hour", 12, 0); - ts.tm_min = getfield(L, "min", 0, 0); - ts.tm_sec = getfield(L, "sec", 0, 0); - ts.tm_isdst = getboolfield(L, "isdst"); - t = mktime(&ts); - setallfields(L, &ts); /* update fields with normalized values */ - } - if (t != (time_t)(l_timet)t || t == (time_t)(-1)) - return luaL_error(L, - "time result cannot be represented in this installation"); - l_pushtime(L, t); - return 1; -} - - -static int os_difftime (lua_State *L) { - time_t t1 = l_checktime(L, 1); - time_t t2 = l_checktime(L, 2); - lua_pushnumber(L, (lua_Number)difftime(t1, t2)); - return 1; -} - -/* }====================================================== */ - - -static int os_setlocale (lua_State *L) { - static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY, - LC_NUMERIC, LC_TIME}; - static const char *const catnames[] = {"all", "collate", "ctype", "monetary", - "numeric", "time", NULL}; - const char *l = luaL_optstring(L, 1, NULL); - int op = luaL_checkoption(L, 2, "all", catnames); - lua_pushstring(L, setlocale(cat[op], l)); - return 1; -} - - -static int os_exit (lua_State *L) { - int status; - if (lua_isboolean(L, 1)) - status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE); - else - status = (int)luaL_optinteger(L, 1, EXIT_SUCCESS); - if (lua_toboolean(L, 2)) - lua_close(L); - if (L) exit(status); /* 'if' to avoid warnings for unreachable 'return' */ - return 0; -} - - -static const luaL_Reg syslib[] = { - {"clock", os_clock}, - {"date", os_date}, - {"difftime", os_difftime}, - {"execute", os_execute}, - {"exit", os_exit}, - {"getenv", os_getenv}, - {"remove", os_remove}, - {"rename", os_rename}, - {"setlocale", os_setlocale}, - {"time", os_time}, - {"tmpname", os_tmpname}, - {NULL, NULL} -}; - -/* }====================================================== */ - - - -LUAMOD_API int luaopen_os (lua_State *L) { - luaL_newlib(L, syslib); - return 1; -} - diff --git a/lib/lua/lparser.c b/lib/lua/lparser.c deleted file mode 100644 index 3c26a4f..0000000 --- a/lib/lua/lparser.c +++ /dev/null @@ -1,2193 +0,0 @@ -/* -** $Id: lparser.c $ -** Lua Parser -** See Copyright Notice in lua.h -*/ - -#define lparser_c -#define LUA_CORE - -#include "lprefix.h" - - -#include -#include - -#include "lua.h" - -#include "lcode.h" -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "llex.h" -#include "lmem.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lparser.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" - - - -/* maximum number of variable declarations per function (must be - smaller than 250, due to the bytecode format) */ -#define MAXVARS 200 - - -#define hasmultret(k) ((k) == VCALL || (k) == VVARARG) - - -/* because all strings are unified by the scanner, the parser - can use pointer equality for string equality */ -#define eqstr(a,b) ((a) == (b)) - - -/* -** nodes for block list (list of active blocks) -*/ -typedef struct BlockCnt { - struct BlockCnt *previous; /* chain */ - int firstlabel; /* index of first label in this block */ - int firstgoto; /* index of first pending goto in this block */ - short nactvar; /* number of active declarations at block entry */ - lu_byte upval; /* true if some variable in the block is an upvalue */ - lu_byte isloop; /* 1 if 'block' is a loop; 2 if it has pending breaks */ - lu_byte insidetbc; /* true if inside the scope of a to-be-closed var. */ -} BlockCnt; - - - -/* -** prototypes for recursive non-terminal functions -*/ -static void statement (LexState *ls); -static void expr (LexState *ls, expdesc *v); - - -static l_noret error_expected (LexState *ls, int token) { - luaX_syntaxerror(ls, - luaO_pushfstring(ls->L, "%s expected", luaX_token2str(ls, token))); -} - - -static l_noret errorlimit (FuncState *fs, int limit, const char *what) { - lua_State *L = fs->ls->L; - const char *msg; - int line = fs->f->linedefined; - const char *where = (line == 0) - ? "main function" - : luaO_pushfstring(L, "function at line %d", line); - msg = luaO_pushfstring(L, "too many %s (limit is %d) in %s", - what, limit, where); - luaX_syntaxerror(fs->ls, msg); -} - - -void luaY_checklimit (FuncState *fs, int v, int l, const char *what) { - if (l_unlikely(v > l)) errorlimit(fs, l, what); -} - - -/* -** Test whether next token is 'c'; if so, skip it. -*/ -static int testnext (LexState *ls, int c) { - if (ls->t.token == c) { - luaX_next(ls); - return 1; - } - else return 0; -} - - -/* -** Check that next token is 'c'. -*/ -static void check (LexState *ls, int c) { - if (ls->t.token != c) - error_expected(ls, c); -} - - -/* -** Check that next token is 'c' and skip it. -*/ -static void checknext (LexState *ls, int c) { - check(ls, c); - luaX_next(ls); -} - - -#define check_condition(ls,c,msg) { if (!(c)) luaX_syntaxerror(ls, msg); } - - -/* -** Check that next token is 'what' and skip it. In case of error, -** raise an error that the expected 'what' should match a 'who' -** in line 'where' (if that is not the current line). -*/ -static void check_match (LexState *ls, int what, int who, int where) { - if (l_unlikely(!testnext(ls, what))) { - if (where == ls->linenumber) /* all in the same line? */ - error_expected(ls, what); /* do not need a complex message */ - else { - luaX_syntaxerror(ls, luaO_pushfstring(ls->L, - "%s expected (to close %s at line %d)", - luaX_token2str(ls, what), luaX_token2str(ls, who), where)); - } - } -} - - -static TString *str_checkname (LexState *ls) { - TString *ts; - check(ls, TK_NAME); - ts = ls->t.seminfo.ts; - luaX_next(ls); - return ts; -} - - -static void init_exp (expdesc *e, expkind k, int i) { - e->f = e->t = NO_JUMP; - e->k = k; - e->u.info = i; -} - - -static void codestring (expdesc *e, TString *s) { - e->f = e->t = NO_JUMP; - e->k = VKSTR; - e->u.strval = s; -} - - -static void codename (LexState *ls, expdesc *e) { - codestring(e, str_checkname(ls)); -} - - -/* -** Register a new local variable in the active 'Proto' (for debug -** information). -*/ -static short registerlocalvar (LexState *ls, FuncState *fs, - TString *varname) { - Proto *f = fs->f; - int oldsize = f->sizelocvars; - luaM_growvector(ls->L, f->locvars, fs->ndebugvars, f->sizelocvars, - LocVar, SHRT_MAX, "local variables"); - while (oldsize < f->sizelocvars) - f->locvars[oldsize++].varname = NULL; - f->locvars[fs->ndebugvars].varname = varname; - f->locvars[fs->ndebugvars].startpc = fs->pc; - luaC_objbarrier(ls->L, f, varname); - return fs->ndebugvars++; -} - - -/* -** Create a new variable with the given 'name' and given 'kind'. -** Return its index in the function. -*/ -static int new_varkind (LexState *ls, TString *name, lu_byte kind) { - lua_State *L = ls->L; - FuncState *fs = ls->fs; - Dyndata *dyd = ls->dyd; - Vardesc *var; - luaM_growvector(L, dyd->actvar.arr, dyd->actvar.n + 1, - dyd->actvar.size, Vardesc, SHRT_MAX, "variable declarations"); - var = &dyd->actvar.arr[dyd->actvar.n++]; - var->vd.kind = kind; /* default */ - var->vd.name = name; - return dyd->actvar.n - 1 - fs->firstlocal; -} - - -/* -** Create a new local variable with the given 'name' and regular kind. -*/ -static int new_localvar (LexState *ls, TString *name) { - return new_varkind(ls, name, VDKREG); -} - -#define new_localvarliteral(ls,v) \ - new_localvar(ls, \ - luaX_newstring(ls, "" v, (sizeof(v)/sizeof(char)) - 1)); - - - -/* -** Return the "variable description" (Vardesc) of a given variable. -** (Unless noted otherwise, all variables are referred to by their -** compiler indices.) -*/ -static Vardesc *getlocalvardesc (FuncState *fs, int vidx) { - return &fs->ls->dyd->actvar.arr[fs->firstlocal + vidx]; -} - - -/* -** Convert 'nvar', a compiler index level, to its corresponding -** register. For that, search for the highest variable below that level -** that is in a register and uses its register index ('ridx') plus one. -*/ -static lu_byte reglevel (FuncState *fs, int nvar) { - while (nvar-- > 0) { - Vardesc *vd = getlocalvardesc(fs, nvar); /* get previous variable */ - if (varinreg(vd)) /* is in a register? */ - return cast_byte(vd->vd.ridx + 1); - } - return 0; /* no variables in registers */ -} - - -/* -** Return the number of variables in the register stack for the given -** function. -*/ -lu_byte luaY_nvarstack (FuncState *fs) { - return reglevel(fs, fs->nactvar); -} - - -/* -** Get the debug-information entry for current variable 'vidx'. -*/ -static LocVar *localdebuginfo (FuncState *fs, int vidx) { - Vardesc *vd = getlocalvardesc(fs, vidx); - if (!varinreg(vd)) - return NULL; /* no debug info. for constants */ - else { - int idx = vd->vd.pidx; - lua_assert(idx < fs->ndebugvars); - return &fs->f->locvars[idx]; - } -} - - -/* -** Create an expression representing variable 'vidx' -*/ -static void init_var (FuncState *fs, expdesc *e, int vidx) { - e->f = e->t = NO_JUMP; - e->k = VLOCAL; - e->u.var.vidx = cast_short(vidx); - e->u.var.ridx = getlocalvardesc(fs, vidx)->vd.ridx; -} - - -/* -** Raises an error if variable described by 'e' is read only; moreover, -** if 'e' is t[exp] where t is the vararg parameter, change it to index -** a real table. (Virtual vararg tables cannot be changed.) -*/ -static void check_readonly (LexState *ls, expdesc *e) { - FuncState *fs = ls->fs; - TString *varname = NULL; /* to be set if variable is const */ - switch (e->k) { - case VCONST: { - varname = ls->dyd->actvar.arr[e->u.info].vd.name; - break; - } - case VLOCAL: case VVARGVAR: { - Vardesc *vardesc = getlocalvardesc(fs, e->u.var.vidx); - if (vardesc->vd.kind != VDKREG) /* not a regular variable? */ - varname = vardesc->vd.name; - break; - } - case VUPVAL: { - Upvaldesc *up = &fs->f->upvalues[e->u.info]; - if (up->kind != VDKREG) - varname = up->name; - break; - } - case VVARGIND: { - needvatab(fs->f); /* function will need a vararg table */ - e->k = VINDEXED; - } /* FALLTHROUGH */ - case VINDEXUP: case VINDEXSTR: case VINDEXED: { /* global variable */ - if (e->u.ind.ro) /* read-only? */ - varname = tsvalue(&fs->f->k[e->u.ind.keystr]); - break; - } - default: - lua_assert(e->k == VINDEXI); /* this one doesn't need any check */ - return; /* integer index cannot be read-only */ - } - if (varname) - luaK_semerror(ls, "attempt to assign to const variable '%s'", - getstr(varname)); -} - - -/* -** Start the scope for the last 'nvars' created variables. -*/ -static void adjustlocalvars (LexState *ls, int nvars) { - FuncState *fs = ls->fs; - int reglevel = luaY_nvarstack(fs); - int i; - for (i = 0; i < nvars; i++) { - int vidx = fs->nactvar++; - Vardesc *var = getlocalvardesc(fs, vidx); - var->vd.ridx = cast_byte(reglevel++); - var->vd.pidx = registerlocalvar(ls, fs, var->vd.name); - luaY_checklimit(fs, reglevel, MAXVARS, "local variables"); - } -} - - -/* -** Close the scope for all variables up to level 'tolevel'. -** (debug info.) -*/ -static void removevars (FuncState *fs, int tolevel) { - fs->ls->dyd->actvar.n -= (fs->nactvar - tolevel); - while (fs->nactvar > tolevel) { - LocVar *var = localdebuginfo(fs, --fs->nactvar); - if (var) /* does it have debug information? */ - var->endpc = fs->pc; - } -} - - -/* -** Search the upvalues of the function 'fs' for one -** with the given 'name'. -*/ -static int searchupvalue (FuncState *fs, TString *name) { - int i; - Upvaldesc *up = fs->f->upvalues; - for (i = 0; i < fs->nups; i++) { - if (eqstr(up[i].name, name)) return i; - } - return -1; /* not found */ -} - - -static Upvaldesc *allocupvalue (FuncState *fs) { - Proto *f = fs->f; - int oldsize = f->sizeupvalues; - luaY_checklimit(fs, fs->nups + 1, MAXUPVAL, "upvalues"); - luaM_growvector(fs->ls->L, f->upvalues, fs->nups, f->sizeupvalues, - Upvaldesc, MAXUPVAL, "upvalues"); - while (oldsize < f->sizeupvalues) - f->upvalues[oldsize++].name = NULL; - return &f->upvalues[fs->nups++]; -} - - -static int newupvalue (FuncState *fs, TString *name, expdesc *v) { - Upvaldesc *up = allocupvalue(fs); - FuncState *prev = fs->prev; - if (v->k == VLOCAL) { - up->instack = 1; - up->idx = v->u.var.ridx; - up->kind = getlocalvardesc(prev, v->u.var.vidx)->vd.kind; - lua_assert(eqstr(name, getlocalvardesc(prev, v->u.var.vidx)->vd.name)); - } - else { - up->instack = 0; - up->idx = cast_byte(v->u.info); - up->kind = prev->f->upvalues[v->u.info].kind; - lua_assert(eqstr(name, prev->f->upvalues[v->u.info].name)); - } - up->name = name; - luaC_objbarrier(fs->ls->L, fs->f, name); - return fs->nups - 1; -} - - -/* -** Look for an active variable with the name 'n' in the -** function 'fs'. If found, initialize 'var' with it and return -** its expression kind; otherwise return -1. While searching, -** var->u.info==-1 means that the preambular global declaration is -** active (the default while there is no other global declaration); -** var->u.info==-2 means there is no active collective declaration -** (some previous global declaration but no collective declaration); -** and var->u.info>=0 points to the inner-most (the first one found) -** collective declaration, if there is one. -*/ -static int searchvar (FuncState *fs, TString *n, expdesc *var) { - int i; - for (i = cast_int(fs->nactvar) - 1; i >= 0; i--) { - Vardesc *vd = getlocalvardesc(fs, i); - if (varglobal(vd)) { /* global declaration? */ - if (vd->vd.name == NULL) { /* collective declaration? */ - if (var->u.info < 0) /* no previous collective declaration? */ - var->u.info = fs->firstlocal + i; /* this is the first one */ - } - else { /* global name */ - if (eqstr(n, vd->vd.name)) { /* found? */ - init_exp(var, VGLOBAL, fs->firstlocal + i); - return VGLOBAL; - } - else if (var->u.info == -1) /* active preambular declaration? */ - var->u.info = -2; /* invalidate preambular declaration */ - } - } - else if (eqstr(n, vd->vd.name)) { /* found? */ - if (vd->vd.kind == RDKCTC) /* compile-time constant? */ - init_exp(var, VCONST, fs->firstlocal + i); - else { /* local variable */ - init_var(fs, var, i); - if (vd->vd.kind == RDKVAVAR) /* vararg parameter? */ - var->k = VVARGVAR; - } - return cast_int(var->k); - } - } - return -1; /* not found */ -} - - -/* -** Mark block where variable at given level was defined -** (to emit close instructions later). -*/ -static void markupval (FuncState *fs, int level) { - BlockCnt *bl = fs->bl; - while (bl->nactvar > level) - bl = bl->previous; - bl->upval = 1; - fs->needclose = 1; -} - - -/* -** Mark that current block has a to-be-closed variable. -*/ -static void marktobeclosed (FuncState *fs) { - BlockCnt *bl = fs->bl; - bl->upval = 1; - bl->insidetbc = 1; - fs->needclose = 1; -} - - -/* -** Find a variable with the given name 'n'. If it is an upvalue, add -** this upvalue into all intermediate functions. If it is a global, set -** 'var' as 'void' as a flag. -*/ -static void singlevaraux (FuncState *fs, TString *n, expdesc *var, int base) { - int v = searchvar(fs, n, var); /* look up variables at current level */ - if (v >= 0) { /* found? */ - if (!base) { - if (var->k == VVARGVAR) /* vararg parameter? */ - luaK_vapar2local(fs, var); /* change it to a regular local */ - if (var->k == VLOCAL) - markupval(fs, var->u.var.vidx); /* will be used as an upvalue */ - } - /* else nothing else to be done */ - } - else { /* not found at current level; try upvalues */ - int idx = searchupvalue(fs, n); /* try existing upvalues */ - if (idx < 0) { /* not found? */ - if (fs->prev != NULL) /* more levels? */ - singlevaraux(fs->prev, n, var, 0); /* try upper levels */ - if (var->k == VLOCAL || var->k == VUPVAL) /* local or upvalue? */ - idx = newupvalue(fs, n, var); /* will be a new upvalue */ - else /* it is a global or a constant */ - return; /* don't need to do anything at this level */ - } - init_exp(var, VUPVAL, idx); /* new or old upvalue */ - } -} - - -static void buildglobal (LexState *ls, TString *varname, expdesc *var) { - FuncState *fs = ls->fs; - expdesc key; - init_exp(var, VGLOBAL, -1); /* global by default */ - singlevaraux(fs, ls->envn, var, 1); /* get environment variable */ - if (var->k == VGLOBAL) - luaK_semerror(ls, "%s is global when accessing variable '%s'", - LUA_ENV, getstr(varname)); - luaK_exp2anyregup(fs, var); /* _ENV could be a constant */ - codestring(&key, varname); /* key is variable name */ - luaK_indexed(fs, var, &key); /* 'var' represents _ENV[varname] */ -} - - -/* -** Find a variable with the given name 'n', handling global variables -** too. -*/ -static void buildvar (LexState *ls, TString *varname, expdesc *var) { - FuncState *fs = ls->fs; - init_exp(var, VGLOBAL, -1); /* global by default */ - singlevaraux(fs, varname, var, 1); - if (var->k == VGLOBAL) { /* global name? */ - int info = var->u.info; - /* global by default in the scope of a global declaration? */ - if (info == -2) - luaK_semerror(ls, "variable '%s' not declared", getstr(varname)); - buildglobal(ls, varname, var); - if (info != -1 && ls->dyd->actvar.arr[info].vd.kind == GDKCONST) - var->u.ind.ro = 1; /* mark variable as read-only */ - else /* anyway must be a global */ - lua_assert(info == -1 || ls->dyd->actvar.arr[info].vd.kind == GDKREG); - } -} - - -static void singlevar (LexState *ls, expdesc *var) { - buildvar(ls, str_checkname(ls), var); -} - - -/* -** Adjust the number of results from an expression list 'e' with 'nexps' -** expressions to 'nvars' values. -*/ -static void adjust_assign (LexState *ls, int nvars, int nexps, expdesc *e) { - FuncState *fs = ls->fs; - int needed = nvars - nexps; /* extra values needed */ - luaK_checkstack(fs, needed); - if (hasmultret(e->k)) { /* last expression has multiple returns? */ - int extra = needed + 1; /* discount last expression itself */ - if (extra < 0) - extra = 0; - luaK_setreturns(fs, e, extra); /* last exp. provides the difference */ - } - else { - if (e->k != VVOID) /* at least one expression? */ - luaK_exp2nextreg(fs, e); /* close last expression */ - if (needed > 0) /* missing values? */ - luaK_nil(fs, fs->freereg, needed); /* complete with nils */ - } - if (needed > 0) - luaK_reserveregs(fs, needed); /* registers for extra values */ - else /* adding 'needed' is actually a subtraction */ - fs->freereg = cast_byte(fs->freereg + needed); /* remove extra values */ -} - - -#define enterlevel(ls) luaE_incCstack(ls->L) - - -#define leavelevel(ls) ((ls)->L->nCcalls--) - - -/* -** Generates an error that a goto jumps into the scope of some -** variable declaration. -*/ -static l_noret jumpscopeerror (LexState *ls, Labeldesc *gt) { - TString *tsname = getlocalvardesc(ls->fs, gt->nactvar)->vd.name; - const char *varname = (tsname != NULL) ? getstr(tsname) : "*"; - luaK_semerror(ls, - " at line %d jumps into the scope of '%s'", - getstr(gt->name), gt->line, varname); /* raise the error */ -} - - -/* -** Closes the goto at index 'g' to given 'label' and removes it -** from the list of pending gotos. -** If it jumps into the scope of some variable, raises an error. -** The goto needs a CLOSE if it jumps out of a block with upvalues, -** or out of the scope of some variable and the block has upvalues -** (signaled by parameter 'bup'). -*/ -static void closegoto (LexState *ls, int g, Labeldesc *label, int bup) { - int i; - FuncState *fs = ls->fs; - Labellist *gl = &ls->dyd->gt; /* list of gotos */ - Labeldesc *gt = &gl->arr[g]; /* goto to be resolved */ - lua_assert(eqstr(gt->name, label->name)); - if (l_unlikely(gt->nactvar < label->nactvar)) /* enter some scope? */ - jumpscopeerror(ls, gt); - if (gt->close || - (label->nactvar < gt->nactvar && bup)) { /* needs close? */ - lu_byte stklevel = reglevel(fs, label->nactvar); - /* move jump to CLOSE position */ - fs->f->code[gt->pc + 1] = fs->f->code[gt->pc]; - /* put CLOSE instruction at original position */ - fs->f->code[gt->pc] = CREATE_ABCk(OP_CLOSE, stklevel, 0, 0, 0); - gt->pc++; /* must point to jump instruction */ - } - luaK_patchlist(ls->fs, gt->pc, label->pc); /* goto jumps to label */ - for (i = g; i < gl->n - 1; i++) /* remove goto from pending list */ - gl->arr[i] = gl->arr[i + 1]; - gl->n--; -} - - -/* -** Search for an active label with the given name, starting at -** index 'ilb' (so that it can search for all labels in current block -** or all labels in current function). -*/ -static Labeldesc *findlabel (LexState *ls, TString *name, int ilb) { - Dyndata *dyd = ls->dyd; - for (; ilb < dyd->label.n; ilb++) { - Labeldesc *lb = &dyd->label.arr[ilb]; - if (eqstr(lb->name, name)) /* correct label? */ - return lb; - } - return NULL; /* label not found */ -} - - -/* -** Adds a new label/goto in the corresponding list. -*/ -static int newlabelentry (LexState *ls, Labellist *l, TString *name, - int line, int pc) { - int n = l->n; - luaM_growvector(ls->L, l->arr, n, l->size, - Labeldesc, SHRT_MAX, "labels/gotos"); - l->arr[n].name = name; - l->arr[n].line = line; - l->arr[n].nactvar = ls->fs->nactvar; - l->arr[n].close = 0; - l->arr[n].pc = pc; - l->n = n + 1; - return n; -} - - -/* -** Create an entry for the goto and the code for it. As it is not known -** at this point whether the goto may need a CLOSE, the code has a jump -** followed by an CLOSE. (As the CLOSE comes after the jump, it is a -** dead instruction; it works as a placeholder.) When the goto is closed -** against a label, if it needs a CLOSE, the two instructions swap -** positions, so that the CLOSE comes before the jump. -*/ -static int newgotoentry (LexState *ls, TString *name, int line) { - FuncState *fs = ls->fs; - int pc = luaK_jump(fs); /* create jump */ - luaK_codeABC(fs, OP_CLOSE, 0, 1, 0); /* spaceholder, marked as dead */ - return newlabelentry(ls, &ls->dyd->gt, name, line, pc); -} - - -/* -** Create a new label with the given 'name' at the given 'line'. -** 'last' tells whether label is the last non-op statement in its -** block. Solves all pending gotos to this new label and adds -** a close instruction if necessary. -** Returns true iff it added a close instruction. -*/ -static void createlabel (LexState *ls, TString *name, int line, int last) { - FuncState *fs = ls->fs; - Labellist *ll = &ls->dyd->label; - int l = newlabelentry(ls, ll, name, line, luaK_getlabel(fs)); - if (last) { /* label is last no-op statement in the block? */ - /* assume that locals are already out of scope */ - ll->arr[l].nactvar = fs->bl->nactvar; - } -} - - -/* -** Traverse the pending gotos of the finishing block checking whether -** each match some label of that block. Those that do not match are -** "exported" to the outer block, to be solved there. In particular, -** its 'nactvar' is updated with the level of the inner block, -** as the variables of the inner block are now out of scope. -*/ -static void solvegotos (FuncState *fs, BlockCnt *bl) { - LexState *ls = fs->ls; - Labellist *gl = &ls->dyd->gt; - int outlevel = reglevel(fs, bl->nactvar); /* level outside the block */ - int igt = bl->firstgoto; /* first goto in the finishing block */ - while (igt < gl->n) { /* for each pending goto */ - Labeldesc *gt = &gl->arr[igt]; - /* search for a matching label in the current block */ - Labeldesc *lb = findlabel(ls, gt->name, bl->firstlabel); - if (lb != NULL) /* found a match? */ - closegoto(ls, igt, lb, bl->upval); /* close and remove goto */ - else { /* adjust 'goto' for outer block */ - /* block has variables to be closed and goto escapes the scope of - some variable? */ - if (bl->upval && reglevel(fs, gt->nactvar) > outlevel) - gt->close = 1; /* jump may need a close */ - gt->nactvar = bl->nactvar; /* correct level for outer block */ - igt++; /* go to next goto */ - } - } - ls->dyd->label.n = bl->firstlabel; /* remove local labels */ -} - - -static void enterblock (FuncState *fs, BlockCnt *bl, lu_byte isloop) { - bl->isloop = isloop; - bl->nactvar = fs->nactvar; - bl->firstlabel = fs->ls->dyd->label.n; - bl->firstgoto = fs->ls->dyd->gt.n; - bl->upval = 0; - /* inherit 'insidetbc' from enclosing block */ - bl->insidetbc = (fs->bl != NULL && fs->bl->insidetbc); - bl->previous = fs->bl; /* link block in function's block list */ - fs->bl = bl; - lua_assert(fs->freereg == luaY_nvarstack(fs)); -} - - -/* -** generates an error for an undefined 'goto'. -*/ -static l_noret undefgoto (LexState *ls, Labeldesc *gt) { - /* breaks are checked when created, cannot be undefined */ - lua_assert(!eqstr(gt->name, ls->brkn)); - luaK_semerror(ls, "no visible label '%s' for at line %d", - getstr(gt->name), gt->line); -} - - -static void leaveblock (FuncState *fs) { - BlockCnt *bl = fs->bl; - LexState *ls = fs->ls; - lu_byte stklevel = reglevel(fs, bl->nactvar); /* level outside block */ - if (bl->previous && bl->upval) /* need a 'close'? */ - luaK_codeABC(fs, OP_CLOSE, stklevel, 0, 0); - fs->freereg = stklevel; /* free registers */ - removevars(fs, bl->nactvar); /* remove block locals */ - lua_assert(bl->nactvar == fs->nactvar); /* back to level on entry */ - if (bl->isloop == 2) /* has to fix pending breaks? */ - createlabel(ls, ls->brkn, 0, 0); - solvegotos(fs, bl); - if (bl->previous == NULL) { /* was it the last block? */ - if (bl->firstgoto < ls->dyd->gt.n) /* still pending gotos? */ - undefgoto(ls, &ls->dyd->gt.arr[bl->firstgoto]); /* error */ - } - fs->bl = bl->previous; /* current block now is previous one */ -} - - -/* -** adds a new prototype into list of prototypes -*/ -static Proto *addprototype (LexState *ls) { - Proto *clp; - lua_State *L = ls->L; - FuncState *fs = ls->fs; - Proto *f = fs->f; /* prototype of current function */ - if (fs->np >= f->sizep) { - int oldsize = f->sizep; - luaM_growvector(L, f->p, fs->np, f->sizep, Proto *, MAXARG_Bx, "functions"); - while (oldsize < f->sizep) - f->p[oldsize++] = NULL; - } - f->p[fs->np++] = clp = luaF_newproto(L); - luaC_objbarrier(L, f, clp); - return clp; -} - - -/* -** codes instruction to create new closure in parent function. -** The OP_CLOSURE instruction uses the last available register, -** so that, if it invokes the GC, the GC knows which registers -** are in use at that time. - -*/ -static void codeclosure (LexState *ls, expdesc *v) { - FuncState *fs = ls->fs->prev; - init_exp(v, VRELOC, luaK_codeABx(fs, OP_CLOSURE, 0, fs->np - 1)); - luaK_exp2nextreg(fs, v); /* fix it at the last register */ -} - - -static void open_func (LexState *ls, FuncState *fs, BlockCnt *bl) { - lua_State *L = ls->L; - Proto *f = fs->f; - fs->prev = ls->fs; /* linked list of funcstates */ - fs->ls = ls; - ls->fs = fs; - fs->pc = 0; - fs->previousline = f->linedefined; - fs->iwthabs = 0; - fs->lasttarget = 0; - fs->freereg = 0; - fs->nk = 0; - fs->nabslineinfo = 0; - fs->np = 0; - fs->nups = 0; - fs->ndebugvars = 0; - fs->nactvar = 0; - fs->needclose = 0; - fs->firstlocal = ls->dyd->actvar.n; - fs->firstlabel = ls->dyd->label.n; - fs->bl = NULL; - f->source = ls->source; - luaC_objbarrier(L, f, f->source); - f->maxstacksize = 2; /* registers 0/1 are always valid */ - fs->kcache = luaH_new(L); /* create table for function */ - luaD_anchorobj(L, ls->h, obj2gco(fs->kcache)); /* anchor it */ - enterblock(fs, bl, 0); -} - - -static void close_func (LexState *ls) { - lua_State *L = ls->L; - FuncState *fs = ls->fs; - Proto *f = fs->f; - TValue temp; - luaK_ret(fs, luaY_nvarstack(fs), 0); /* final return */ - leaveblock(fs); - lua_assert(fs->bl == NULL); - luaK_finish(fs); - luaM_shrinkvector(L, f->code, f->sizecode, fs->pc, Instruction); - luaM_shrinkvector(L, f->lineinfo, f->sizelineinfo, fs->pc, ls_byte); - luaM_shrinkvector(L, f->abslineinfo, f->sizeabslineinfo, - fs->nabslineinfo, AbsLineInfo); - luaM_shrinkvector(L, f->k, f->sizek, fs->nk, TValue); - luaM_shrinkvector(L, f->p, f->sizep, fs->np, Proto *); - luaM_shrinkvector(L, f->locvars, f->sizelocvars, fs->ndebugvars, LocVar); - luaM_shrinkvector(L, f->upvalues, f->sizeupvalues, fs->nups, Upvaldesc); - /* remove kcache table from scanner table ("weigh" its anchor) */ - sethvalue(L, &temp, fs->kcache); /* key to be set to nil */ - luaH_set(L, ls->h, &temp, &G(L)->nilvalue); - ls->fs = fs->prev; - luaC_checkGC(L); -} - - -/* -** {====================================================================== -** GRAMMAR RULES -** ======================================================================= -*/ - - -/* -** check whether current token is in the follow set of a block. -** 'until' closes syntactical blocks, but do not close scope, -** so it is handled in separate. -*/ -static int block_follow (LexState *ls, int withuntil) { - switch (ls->t.token) { - case TK_ELSE: case TK_ELSEIF: - case TK_END: case TK_EOS: - return 1; - case TK_UNTIL: return withuntil; - default: return 0; - } -} - - -static void statlist (LexState *ls) { - /* statlist -> { stat [';'] } */ - while (!block_follow(ls, 1)) { - if (ls->t.token == TK_RETURN) { - statement(ls); - return; /* 'return' must be last statement */ - } - statement(ls); - } -} - - -static void fieldsel (LexState *ls, expdesc *v) { - /* fieldsel -> ['.' | ':'] NAME */ - FuncState *fs = ls->fs; - expdesc key; - luaK_exp2anyregup(fs, v); - luaX_next(ls); /* skip the dot or colon */ - codename(ls, &key); - luaK_indexed(fs, v, &key); -} - - -static void yindex (LexState *ls, expdesc *v) { - /* index -> '[' expr ']' */ - luaX_next(ls); /* skip the '[' */ - expr(ls, v); - luaK_exp2val(ls->fs, v); - checknext(ls, ']'); -} - - -/* -** {====================================================================== -** Rules for Constructors -** ======================================================================= -*/ - -typedef struct ConsControl { - expdesc v; /* last list item read */ - expdesc *t; /* table descriptor */ - int nh; /* total number of 'record' elements */ - int na; /* number of array elements already stored */ - int tostore; /* number of array elements pending to be stored */ - int maxtostore; /* maximum number of pending elements */ -} ConsControl; - - -/* -** Maximum number of elements in a constructor, to control the following: -** * counter overflows; -** * overflows in 'extra' for OP_NEWTABLE and OP_SETLIST; -** * overflows when adding multiple returns in OP_SETLIST. -*/ -#define MAX_CNST (INT_MAX/2) -#if MAX_CNST/(MAXARG_vC + 1) > MAXARG_Ax -#undef MAX_CNST -#define MAX_CNST (MAXARG_Ax * (MAXARG_vC + 1)) -#endif - - -static void recfield (LexState *ls, ConsControl *cc) { - /* recfield -> (NAME | '['exp']') = exp */ - FuncState *fs = ls->fs; - lu_byte reg = ls->fs->freereg; - expdesc tab, key, val; - if (ls->t.token == TK_NAME) - codename(ls, &key); - else /* ls->t.token == '[' */ - yindex(ls, &key); - cc->nh++; - checknext(ls, '='); - tab = *cc->t; - luaK_indexed(fs, &tab, &key); - expr(ls, &val); - luaK_storevar(fs, &tab, &val); - fs->freereg = reg; /* free registers */ -} - - -static void closelistfield (FuncState *fs, ConsControl *cc) { - lua_assert(cc->tostore > 0); - luaK_exp2nextreg(fs, &cc->v); - cc->v.k = VVOID; - if (cc->tostore >= cc->maxtostore) { - luaK_setlist(fs, cc->t->u.info, cc->na, cc->tostore); /* flush */ - cc->na += cc->tostore; - cc->tostore = 0; /* no more items pending */ - } -} - - -static void lastlistfield (FuncState *fs, ConsControl *cc) { - if (cc->tostore == 0) return; - if (hasmultret(cc->v.k)) { - luaK_setmultret(fs, &cc->v); - luaK_setlist(fs, cc->t->u.info, cc->na, LUA_MULTRET); - cc->na--; /* do not count last expression (unknown number of elements) */ - } - else { - if (cc->v.k != VVOID) - luaK_exp2nextreg(fs, &cc->v); - luaK_setlist(fs, cc->t->u.info, cc->na, cc->tostore); - } - cc->na += cc->tostore; -} - - -static void listfield (LexState *ls, ConsControl *cc) { - /* listfield -> exp */ - expr(ls, &cc->v); - cc->tostore++; -} - - -static void field (LexState *ls, ConsControl *cc) { - /* field -> listfield | recfield */ - switch(ls->t.token) { - case TK_NAME: { /* may be 'listfield' or 'recfield' */ - if (luaX_lookahead(ls) != '=') /* expression? */ - listfield(ls, cc); - else - recfield(ls, cc); - break; - } - case '[': { - recfield(ls, cc); - break; - } - default: { - listfield(ls, cc); - break; - } - } -} - - -/* -** Compute a limit for how many registers a constructor can use before -** emitting a 'SETLIST' instruction, based on how many registers are -** available. -*/ -static int maxtostore (FuncState *fs) { - int numfreeregs = MAX_FSTACK - fs->freereg; - if (numfreeregs >= 160) /* "lots" of registers? */ - return numfreeregs / 5; /* use up to 1/5 of them */ - else if (numfreeregs >= 80) /* still "enough" registers? */ - return 10; /* one 'SETLIST' instruction for each 10 values */ - else /* save registers for potential more nesting */ - return 1; -} - - -static void constructor (LexState *ls, expdesc *t) { - /* constructor -> '{' [ field { sep field } [sep] ] '}' - sep -> ',' | ';' */ - FuncState *fs = ls->fs; - int line = ls->linenumber; - int pc = luaK_codevABCk(fs, OP_NEWTABLE, 0, 0, 0, 0); - ConsControl cc; - luaK_code(fs, 0); /* space for extra arg. */ - cc.na = cc.nh = cc.tostore = 0; - cc.t = t; - init_exp(t, VNONRELOC, fs->freereg); /* table will be at stack top */ - luaK_reserveregs(fs, 1); - init_exp(&cc.v, VVOID, 0); /* no value (yet) */ - checknext(ls, '{' /*}*/); - cc.maxtostore = maxtostore(fs); - do { - if (ls->t.token == /*{*/ '}') break; - if (cc.v.k != VVOID) /* is there a previous list item? */ - closelistfield(fs, &cc); /* close it */ - field(ls, &cc); - luaY_checklimit(fs, cc.tostore + cc.na + cc.nh, MAX_CNST, - "items in a constructor"); - } while (testnext(ls, ',') || testnext(ls, ';')); - check_match(ls, /*{*/ '}', '{' /*}*/, line); - lastlistfield(fs, &cc); - luaK_settablesize(fs, pc, t->u.info, cc.na, cc.nh); -} - -/* }====================================================================== */ - - -static void setvararg (FuncState *fs) { - fs->f->flag |= PF_VAHID; /* by default, use hidden vararg arguments */ - luaK_codeABC(fs, OP_VARARGPREP, 0, 0, 0); -} - - -static void parlist (LexState *ls) { - /* parlist -> [ {NAME ','} (NAME | '...') ] */ - FuncState *fs = ls->fs; - Proto *f = fs->f; - int nparams = 0; - int varargk = 0; - if (ls->t.token != ')') { /* is 'parlist' not empty? */ - do { - switch (ls->t.token) { - case TK_NAME: { - new_localvar(ls, str_checkname(ls)); - nparams++; - break; - } - case TK_DOTS: { - varargk = 1; - luaX_next(ls); /* skip '...' */ - if (ls->t.token == TK_NAME) - new_varkind(ls, str_checkname(ls), RDKVAVAR); - else - new_localvarliteral(ls, "(vararg table)"); - break; - } - default: luaX_syntaxerror(ls, " or '...' expected"); - } - } while (!varargk && testnext(ls, ',')); - } - adjustlocalvars(ls, nparams); - f->numparams = cast_byte(fs->nactvar); - if (varargk) { - setvararg(fs); /* declared vararg */ - adjustlocalvars(ls, 1); /* vararg parameter */ - } - /* reserve registers for parameters (plus vararg parameter, if present) */ - luaK_reserveregs(fs, fs->nactvar); -} - - -static void body (LexState *ls, expdesc *e, int ismethod, int line) { - /* body -> '(' parlist ')' block END */ - FuncState new_fs; - BlockCnt bl; - new_fs.f = addprototype(ls); - new_fs.f->linedefined = line; - open_func(ls, &new_fs, &bl); - checknext(ls, '('); - if (ismethod) { - new_localvarliteral(ls, "self"); /* create 'self' parameter */ - adjustlocalvars(ls, 1); - } - parlist(ls); - checknext(ls, ')'); - statlist(ls); - new_fs.f->lastlinedefined = ls->linenumber; - check_match(ls, TK_END, TK_FUNCTION, line); - codeclosure(ls, e); - close_func(ls); -} - - -static int explist (LexState *ls, expdesc *v) { - /* explist -> expr { ',' expr } */ - int n = 1; /* at least one expression */ - expr(ls, v); - while (testnext(ls, ',')) { - luaK_exp2nextreg(ls->fs, v); - expr(ls, v); - n++; - } - return n; -} - - -static void funcargs (LexState *ls, expdesc *f) { - FuncState *fs = ls->fs; - expdesc args; - int base, nparams; - int line = ls->linenumber; - switch (ls->t.token) { - case '(': { /* funcargs -> '(' [ explist ] ')' */ - luaX_next(ls); - if (ls->t.token == ')') /* arg list is empty? */ - args.k = VVOID; - else { - explist(ls, &args); - if (hasmultret(args.k)) - luaK_setmultret(fs, &args); - } - check_match(ls, ')', '(', line); - break; - } - case '{' /*}*/: { /* funcargs -> constructor */ - constructor(ls, &args); - break; - } - case TK_STRING: { /* funcargs -> STRING */ - codestring(&args, ls->t.seminfo.ts); - luaX_next(ls); /* must use 'seminfo' before 'next' */ - break; - } - default: { - luaX_syntaxerror(ls, "function arguments expected"); - return; /* to avoid warnings */ - } - } - lua_assert(f->k == VNONRELOC); - base = f->u.info; /* base register for call */ - if (hasmultret(args.k)) - nparams = LUA_MULTRET; /* open call */ - else { - if (args.k != VVOID) - luaK_exp2nextreg(fs, &args); /* close last argument */ - nparams = fs->freereg - (base+1); - } - init_exp(f, VCALL, luaK_codeABC(fs, OP_CALL, base, nparams+1, 2)); - luaK_fixline(fs, line); - /* call removes function and arguments and leaves one result (unless - changed later) */ - fs->freereg = cast_byte(base + 1); -} - - - - -/* -** {====================================================================== -** Expression parsing -** ======================================================================= -*/ - - -static void primaryexp (LexState *ls, expdesc *v) { - /* primaryexp -> NAME | '(' expr ')' */ - switch (ls->t.token) { - case '(': { - int line = ls->linenumber; - luaX_next(ls); - expr(ls, v); - check_match(ls, ')', '(', line); - luaK_dischargevars(ls->fs, v); - return; - } - case TK_NAME: { - singlevar(ls, v); - return; - } - default: { - luaX_syntaxerror(ls, "unexpected symbol"); - } - } -} - - -static void suffixedexp (LexState *ls, expdesc *v) { - /* suffixedexp -> - primaryexp { '.' NAME | '[' exp ']' | ':' NAME funcargs | funcargs } */ - FuncState *fs = ls->fs; - primaryexp(ls, v); - for (;;) { - switch (ls->t.token) { - case '.': { /* fieldsel */ - fieldsel(ls, v); - break; - } - case '[': { /* '[' exp ']' */ - expdesc key; - luaK_exp2anyregup(fs, v); - yindex(ls, &key); - luaK_indexed(fs, v, &key); - break; - } - case ':': { /* ':' NAME funcargs */ - expdesc key; - luaX_next(ls); - codename(ls, &key); - luaK_self(fs, v, &key); - funcargs(ls, v); - break; - } - case '(': case TK_STRING: case '{' /*}*/: { /* funcargs */ - luaK_exp2nextreg(fs, v); - funcargs(ls, v); - break; - } - default: return; - } - } -} - - -static void simpleexp (LexState *ls, expdesc *v) { - /* simpleexp -> FLT | INT | STRING | NIL | TRUE | FALSE | ... | - constructor | FUNCTION body | suffixedexp */ - switch (ls->t.token) { - case TK_FLT: { - init_exp(v, VKFLT, 0); - v->u.nval = ls->t.seminfo.r; - break; - } - case TK_INT: { - init_exp(v, VKINT, 0); - v->u.ival = ls->t.seminfo.i; - break; - } - case TK_STRING: { - codestring(v, ls->t.seminfo.ts); - break; - } - case TK_NIL: { - init_exp(v, VNIL, 0); - break; - } - case TK_TRUE: { - init_exp(v, VTRUE, 0); - break; - } - case TK_FALSE: { - init_exp(v, VFALSE, 0); - break; - } - case TK_DOTS: { /* vararg */ - FuncState *fs = ls->fs; - check_condition(ls, isvararg(fs->f), - "cannot use '...' outside a vararg function"); - init_exp(v, VVARARG, luaK_codeABC(fs, OP_VARARG, 0, fs->f->numparams, 1)); - break; - } - case '{' /*}*/: { /* constructor */ - constructor(ls, v); - return; - } - case TK_FUNCTION: { - luaX_next(ls); - body(ls, v, 0, ls->linenumber); - return; - } - default: { - suffixedexp(ls, v); - return; - } - } - luaX_next(ls); -} - - -static UnOpr getunopr (int op) { - switch (op) { - case TK_NOT: return OPR_NOT; - case '-': return OPR_MINUS; - case '~': return OPR_BNOT; - case '#': return OPR_LEN; - default: return OPR_NOUNOPR; - } -} - - -static BinOpr getbinopr (int op) { - switch (op) { - case '+': return OPR_ADD; - case '-': return OPR_SUB; - case '*': return OPR_MUL; - case '%': return OPR_MOD; - case '^': return OPR_POW; - case '/': return OPR_DIV; - case TK_IDIV: return OPR_IDIV; - case '&': return OPR_BAND; - case '|': return OPR_BOR; - case '~': return OPR_BXOR; - case TK_SHL: return OPR_SHL; - case TK_SHR: return OPR_SHR; - case TK_CONCAT: return OPR_CONCAT; - case TK_NE: return OPR_NE; - case TK_EQ: return OPR_EQ; - case '<': return OPR_LT; - case TK_LE: return OPR_LE; - case '>': return OPR_GT; - case TK_GE: return OPR_GE; - case TK_AND: return OPR_AND; - case TK_OR: return OPR_OR; - default: return OPR_NOBINOPR; - } -} - - -/* -** Priority table for binary operators. -*/ -static const struct { - lu_byte left; /* left priority for each binary operator */ - lu_byte right; /* right priority */ -} priority[] = { /* ORDER OPR */ - {10, 10}, {10, 10}, /* '+' '-' */ - {11, 11}, {11, 11}, /* '*' '%' */ - {14, 13}, /* '^' (right associative) */ - {11, 11}, {11, 11}, /* '/' '//' */ - {6, 6}, {4, 4}, {5, 5}, /* '&' '|' '~' */ - {7, 7}, {7, 7}, /* '<<' '>>' */ - {9, 8}, /* '..' (right associative) */ - {3, 3}, {3, 3}, {3, 3}, /* ==, <, <= */ - {3, 3}, {3, 3}, {3, 3}, /* ~=, >, >= */ - {2, 2}, {1, 1} /* and, or */ -}; - -#define UNARY_PRIORITY 12 /* priority for unary operators */ - - -/* -** subexpr -> (simpleexp | unop subexpr) { binop subexpr } -** where 'binop' is any binary operator with a priority higher than 'limit' -*/ -static BinOpr subexpr (LexState *ls, expdesc *v, int limit) { - BinOpr op; - UnOpr uop; - enterlevel(ls); - uop = getunopr(ls->t.token); - if (uop != OPR_NOUNOPR) { /* prefix (unary) operator? */ - int line = ls->linenumber; - luaX_next(ls); /* skip operator */ - subexpr(ls, v, UNARY_PRIORITY); - luaK_prefix(ls->fs, uop, v, line); - } - else simpleexp(ls, v); - /* expand while operators have priorities higher than 'limit' */ - op = getbinopr(ls->t.token); - while (op != OPR_NOBINOPR && priority[op].left > limit) { - expdesc v2; - BinOpr nextop; - int line = ls->linenumber; - luaX_next(ls); /* skip operator */ - luaK_infix(ls->fs, op, v); - /* read sub-expression with higher priority */ - nextop = subexpr(ls, &v2, priority[op].right); - luaK_posfix(ls->fs, op, v, &v2, line); - op = nextop; - } - leavelevel(ls); - return op; /* return first untreated operator */ -} - - -static void expr (LexState *ls, expdesc *v) { - subexpr(ls, v, 0); -} - -/* }==================================================================== */ - - - -/* -** {====================================================================== -** Rules for Statements -** ======================================================================= -*/ - - -static void block (LexState *ls) { - /* block -> statlist */ - FuncState *fs = ls->fs; - BlockCnt bl; - enterblock(fs, &bl, 0); - statlist(ls); - leaveblock(fs); -} - - -/* -** structure to chain all variables in the left-hand side of an -** assignment -*/ -struct LHS_assign { - struct LHS_assign *prev; - expdesc v; /* variable (global, local, upvalue, or indexed) */ -}; - - -/* -** check whether, in an assignment to an upvalue/local variable, the -** upvalue/local variable is begin used in a previous assignment to a -** table. If so, save original upvalue/local value in a safe place and -** use this safe copy in the previous assignment. -*/ -static void check_conflict (LexState *ls, struct LHS_assign *lh, expdesc *v) { - FuncState *fs = ls->fs; - lu_byte extra = fs->freereg; /* eventual position to save local variable */ - int conflict = 0; - for (; lh; lh = lh->prev) { /* check all previous assignments */ - if (vkisindexed(lh->v.k)) { /* assignment to table field? */ - if (lh->v.k == VINDEXUP) { /* is table an upvalue? */ - if (v->k == VUPVAL && lh->v.u.ind.t == v->u.info) { - conflict = 1; /* table is the upvalue being assigned now */ - lh->v.k = VINDEXSTR; - lh->v.u.ind.t = extra; /* assignment will use safe copy */ - } - } - else { /* table is a register */ - if (v->k == VLOCAL && lh->v.u.ind.t == v->u.var.ridx) { - conflict = 1; /* table is the local being assigned now */ - lh->v.u.ind.t = extra; /* assignment will use safe copy */ - } - /* is index the local being assigned? */ - if (lh->v.k == VINDEXED && v->k == VLOCAL && - lh->v.u.ind.idx == v->u.var.ridx) { - conflict = 1; - lh->v.u.ind.idx = extra; /* previous assignment will use safe copy */ - } - } - } - } - if (conflict) { - /* copy upvalue/local value to a temporary (in position 'extra') */ - if (v->k == VLOCAL) - luaK_codeABC(fs, OP_MOVE, extra, v->u.var.ridx, 0); - else - luaK_codeABC(fs, OP_GETUPVAL, extra, v->u.info, 0); - luaK_reserveregs(fs, 1); - } -} - - -/* Create code to store the "top" register in 'var' */ -static void storevartop (FuncState *fs, expdesc *var) { - expdesc e; - init_exp(&e, VNONRELOC, fs->freereg - 1); - luaK_storevar(fs, var, &e); /* will also free the top register */ -} - - -/* -** Parse and compile a multiple assignment. The first "variable" -** (a 'suffixedexp') was already read by the caller. -** -** assignment -> suffixedexp restassign -** restassign -> ',' suffixedexp restassign | '=' explist -*/ -static void restassign (LexState *ls, struct LHS_assign *lh, int nvars) { - expdesc e; - check_condition(ls, vkisvar(lh->v.k), "syntax error"); - check_readonly(ls, &lh->v); - if (testnext(ls, ',')) { /* restassign -> ',' suffixedexp restassign */ - struct LHS_assign nv; - nv.prev = lh; - suffixedexp(ls, &nv.v); - if (!vkisindexed(nv.v.k)) - check_conflict(ls, lh, &nv.v); - enterlevel(ls); /* control recursion depth */ - restassign(ls, &nv, nvars+1); - leavelevel(ls); - } - else { /* restassign -> '=' explist */ - int nexps; - checknext(ls, '='); - nexps = explist(ls, &e); - if (nexps != nvars) - adjust_assign(ls, nvars, nexps, &e); - else { - luaK_setoneret(ls->fs, &e); /* close last expression */ - luaK_storevar(ls->fs, &lh->v, &e); - return; /* avoid default */ - } - } - storevartop(ls->fs, &lh->v); /* default assignment */ -} - - -static int cond (LexState *ls) { - /* cond -> exp */ - expdesc v; - expr(ls, &v); /* read condition */ - if (v.k == VNIL) v.k = VFALSE; /* 'falses' are all equal here */ - luaK_goiftrue(ls->fs, &v); - return v.f; -} - - -static void gotostat (LexState *ls, int line) { - TString *name = str_checkname(ls); /* label's name */ - newgotoentry(ls, name, line); -} - - -/* -** Break statement. Semantically equivalent to "goto break". -*/ -static void breakstat (LexState *ls, int line) { - BlockCnt *bl; /* to look for an enclosing loop */ - for (bl = ls->fs->bl; bl != NULL; bl = bl->previous) { - if (bl->isloop) /* found one? */ - goto ok; - } - luaX_syntaxerror(ls, "break outside loop"); - ok: - bl->isloop = 2; /* signal that block has pending breaks */ - luaX_next(ls); /* skip break */ - newgotoentry(ls, ls->brkn, line); -} - - -/* -** Check whether there is already a label with the given 'name' at -** current function. -*/ -static void checkrepeated (LexState *ls, TString *name) { - Labeldesc *lb = findlabel(ls, name, ls->fs->firstlabel); - if (l_unlikely(lb != NULL)) /* already defined? */ - luaK_semerror(ls, "label '%s' already defined on line %d", - getstr(name), lb->line); /* error */ -} - - -static void labelstat (LexState *ls, TString *name, int line) { - /* label -> '::' NAME '::' */ - checknext(ls, TK_DBCOLON); /* skip double colon */ - while (ls->t.token == ';' || ls->t.token == TK_DBCOLON) - statement(ls); /* skip other no-op statements */ - checkrepeated(ls, name); /* check for repeated labels */ - createlabel(ls, name, line, block_follow(ls, 0)); -} - - -static void whilestat (LexState *ls, int line) { - /* whilestat -> WHILE cond DO block END */ - FuncState *fs = ls->fs; - int whileinit; - int condexit; - BlockCnt bl; - luaX_next(ls); /* skip WHILE */ - whileinit = luaK_getlabel(fs); - condexit = cond(ls); - enterblock(fs, &bl, 1); - checknext(ls, TK_DO); - block(ls); - luaK_jumpto(fs, whileinit); - check_match(ls, TK_END, TK_WHILE, line); - leaveblock(fs); - luaK_patchtohere(fs, condexit); /* false conditions finish the loop */ -} - - -static void repeatstat (LexState *ls, int line) { - /* repeatstat -> REPEAT block UNTIL cond */ - int condexit; - FuncState *fs = ls->fs; - int repeat_init = luaK_getlabel(fs); - BlockCnt bl1, bl2; - enterblock(fs, &bl1, 1); /* loop block */ - enterblock(fs, &bl2, 0); /* scope block */ - luaX_next(ls); /* skip REPEAT */ - statlist(ls); - check_match(ls, TK_UNTIL, TK_REPEAT, line); - condexit = cond(ls); /* read condition (inside scope block) */ - if (bl2.upval) { /* upvalues? */ - int exit = luaK_jump(fs); /* normal exit must jump over fix */ - luaK_patchtohere(fs, condexit); /* repetition must close upvalues */ - luaK_codeABC(fs, OP_CLOSE, reglevel(fs, bl2.nactvar), 0, 0); - condexit = luaK_jump(fs); /* repeat after closing upvalues */ - luaK_patchtohere(fs, exit); /* normal exit comes to here */ - } - luaK_patchlist(fs, condexit, repeat_init); /* close the loop */ - leaveblock(fs); /* finish scope */ - leaveblock(fs); /* finish loop */ -} - - -/* -** Read an expression and generate code to put its results in next -** stack slot. -** -*/ -static void exp1 (LexState *ls) { - expdesc e; - expr(ls, &e); - luaK_exp2nextreg(ls->fs, &e); - lua_assert(e.k == VNONRELOC); -} - - -/* -** Fix for instruction at position 'pc' to jump to 'dest'. -** (Jump addresses are relative in Lua). 'back' true means -** a back jump. -*/ -static void fixforjump (FuncState *fs, int pc, int dest, int back) { - Instruction *jmp = &fs->f->code[pc]; - int offset = dest - (pc + 1); - if (back) - offset = -offset; - if (l_unlikely(offset > MAXARG_Bx)) - luaX_syntaxerror(fs->ls, "control structure too long"); - SETARG_Bx(*jmp, offset); -} - - -/* -** Generate code for a 'for' loop. -*/ -static void forbody (LexState *ls, int base, int line, int nvars, int isgen) { - /* forbody -> DO block */ - static const OpCode forprep[2] = {OP_FORPREP, OP_TFORPREP}; - static const OpCode forloop[2] = {OP_FORLOOP, OP_TFORLOOP}; - BlockCnt bl; - FuncState *fs = ls->fs; - int prep, endfor; - checknext(ls, TK_DO); - prep = luaK_codeABx(fs, forprep[isgen], base, 0); - fs->freereg--; /* both 'forprep' remove one register from the stack */ - enterblock(fs, &bl, 0); /* scope for declared variables */ - adjustlocalvars(ls, nvars); - luaK_reserveregs(fs, nvars); - block(ls); - leaveblock(fs); /* end of scope for declared variables */ - fixforjump(fs, prep, luaK_getlabel(fs), 0); - if (isgen) { /* generic for? */ - luaK_codeABC(fs, OP_TFORCALL, base, 0, nvars); - luaK_fixline(fs, line); - } - endfor = luaK_codeABx(fs, forloop[isgen], base, 0); - fixforjump(fs, endfor, prep + 1, 1); - luaK_fixline(fs, line); -} - - -static void fornum (LexState *ls, TString *varname, int line) { - /* fornum -> NAME = exp,exp[,exp] forbody */ - FuncState *fs = ls->fs; - int base = fs->freereg; - new_localvarliteral(ls, "(for state)"); - new_localvarliteral(ls, "(for state)"); - new_varkind(ls, varname, RDKCONST); /* control variable */ - checknext(ls, '='); - exp1(ls); /* initial value */ - checknext(ls, ','); - exp1(ls); /* limit */ - if (testnext(ls, ',')) - exp1(ls); /* optional step */ - else { /* default step = 1 */ - luaK_int(fs, fs->freereg, 1); - luaK_reserveregs(fs, 1); - } - adjustlocalvars(ls, 2); /* start scope for internal variables */ - forbody(ls, base, line, 1, 0); -} - - -static void forlist (LexState *ls, TString *indexname) { - /* forlist -> NAME {,NAME} IN explist forbody */ - FuncState *fs = ls->fs; - expdesc e; - int nvars = 4; /* function, state, closing, control */ - int line; - int base = fs->freereg; - /* create internal variables */ - new_localvarliteral(ls, "(for state)"); /* iterator function */ - new_localvarliteral(ls, "(for state)"); /* state */ - new_localvarliteral(ls, "(for state)"); /* closing var. (after swap) */ - new_varkind(ls, indexname, RDKCONST); /* control variable */ - /* other declared variables */ - while (testnext(ls, ',')) { - new_localvar(ls, str_checkname(ls)); - nvars++; - } - checknext(ls, TK_IN); - line = ls->linenumber; - adjust_assign(ls, 4, explist(ls, &e), &e); - adjustlocalvars(ls, 3); /* start scope for internal variables */ - marktobeclosed(fs); /* last internal var. must be closed */ - luaK_checkstack(fs, 2); /* extra space to call iterator */ - forbody(ls, base, line, nvars - 3, 1); -} - - -static void forstat (LexState *ls, int line) { - /* forstat -> FOR (fornum | forlist) END */ - FuncState *fs = ls->fs; - TString *varname; - BlockCnt bl; - enterblock(fs, &bl, 1); /* scope for loop and control variables */ - luaX_next(ls); /* skip 'for' */ - varname = str_checkname(ls); /* first variable name */ - switch (ls->t.token) { - case '=': fornum(ls, varname, line); break; - case ',': case TK_IN: forlist(ls, varname); break; - default: luaX_syntaxerror(ls, "'=' or 'in' expected"); - } - check_match(ls, TK_END, TK_FOR, line); - leaveblock(fs); /* loop scope ('break' jumps to this point) */ -} - - -static void test_then_block (LexState *ls, int *escapelist) { - /* test_then_block -> [IF | ELSEIF] cond THEN block */ - FuncState *fs = ls->fs; - int condtrue; - luaX_next(ls); /* skip IF or ELSEIF */ - condtrue = cond(ls); /* read condition */ - checknext(ls, TK_THEN); - block(ls); /* 'then' part */ - if (ls->t.token == TK_ELSE || - ls->t.token == TK_ELSEIF) /* followed by 'else'/'elseif'? */ - luaK_concat(fs, escapelist, luaK_jump(fs)); /* must jump over it */ - luaK_patchtohere(fs, condtrue); -} - - -static void ifstat (LexState *ls, int line) { - /* ifstat -> IF cond THEN block {ELSEIF cond THEN block} [ELSE block] END */ - FuncState *fs = ls->fs; - int escapelist = NO_JUMP; /* exit list for finished parts */ - test_then_block(ls, &escapelist); /* IF cond THEN block */ - while (ls->t.token == TK_ELSEIF) - test_then_block(ls, &escapelist); /* ELSEIF cond THEN block */ - if (testnext(ls, TK_ELSE)) - block(ls); /* 'else' part */ - check_match(ls, TK_END, TK_IF, line); - luaK_patchtohere(fs, escapelist); /* patch escape list to 'if' end */ -} - - -static void localfunc (LexState *ls) { - expdesc b; - FuncState *fs = ls->fs; - int fvar = fs->nactvar; /* function's variable index */ - new_localvar(ls, str_checkname(ls)); /* new local variable */ - adjustlocalvars(ls, 1); /* enter its scope */ - body(ls, &b, 0, ls->linenumber); /* function created in next register */ - /* debug information will only see the variable after this point! */ - localdebuginfo(fs, fvar)->startpc = fs->pc; -} - - -static lu_byte getvarattribute (LexState *ls, lu_byte df) { - /* attrib -> ['<' NAME '>'] */ - if (testnext(ls, '<')) { - TString *ts = str_checkname(ls); - const char *attr = getstr(ts); - checknext(ls, '>'); - if (strcmp(attr, "const") == 0) - return RDKCONST; /* read-only variable */ - else if (strcmp(attr, "close") == 0) - return RDKTOCLOSE; /* to-be-closed variable */ - else - luaK_semerror(ls, "unknown attribute '%s'", attr); - } - return df; /* return default value */ -} - - -static void checktoclose (FuncState *fs, int level) { - if (level != -1) { /* is there a to-be-closed variable? */ - marktobeclosed(fs); - luaK_codeABC(fs, OP_TBC, reglevel(fs, level), 0, 0); - } -} - - -static void localstat (LexState *ls) { - /* stat -> LOCAL NAME attrib { ',' NAME attrib } ['=' explist] */ - FuncState *fs = ls->fs; - int toclose = -1; /* index of to-be-closed variable (if any) */ - Vardesc *var; /* last variable */ - int vidx; /* index of last variable */ - int nvars = 0; - int nexps; - expdesc e; - /* get prefixed attribute (if any); default is regular local variable */ - lu_byte defkind = getvarattribute(ls, VDKREG); - do { /* for each variable */ - TString *vname = str_checkname(ls); /* get its name */ - lu_byte kind = getvarattribute(ls, defkind); /* postfixed attribute */ - vidx = new_varkind(ls, vname, kind); /* predeclare it */ - if (kind == RDKTOCLOSE) { /* to-be-closed? */ - if (toclose != -1) /* one already present? */ - luaK_semerror(ls, "multiple to-be-closed variables in local list"); - toclose = fs->nactvar + nvars; - } - nvars++; - } while (testnext(ls, ',')); - if (testnext(ls, '=')) /* initialization? */ - nexps = explist(ls, &e); - else { - e.k = VVOID; - nexps = 0; - } - var = getlocalvardesc(fs, vidx); /* retrieve last variable */ - if (nvars == nexps && /* no adjustments? */ - var->vd.kind == RDKCONST && /* last variable is const? */ - luaK_exp2const(fs, &e, &var->k)) { /* compile-time constant? */ - var->vd.kind = RDKCTC; /* variable is a compile-time constant */ - adjustlocalvars(ls, nvars - 1); /* exclude last variable */ - fs->nactvar++; /* but count it */ - } - else { - adjust_assign(ls, nvars, nexps, &e); - adjustlocalvars(ls, nvars); - } - checktoclose(fs, toclose); -} - - -static lu_byte getglobalattribute (LexState *ls, lu_byte df) { - lu_byte kind = getvarattribute(ls, df); - switch (kind) { - case RDKTOCLOSE: - luaK_semerror(ls, "global variables cannot be to-be-closed"); - return kind; /* to avoid warnings */ - case RDKCONST: - return GDKCONST; /* adjust kind for global variable */ - default: - return kind; - } -} - - -static void checkglobal (LexState *ls, TString *varname, int line) { - FuncState *fs = ls->fs; - expdesc var; - int k; - buildglobal(ls, varname, &var); /* create global variable in 'var' */ - k = var.u.ind.keystr; /* index of global name in 'k' */ - luaK_codecheckglobal(fs, &var, k, line); -} - - -/* -** Recursively traverse list of globals to be initalized. When -** going, generate table description for the global. In the end, -** after all indices have been generated, read list of initializing -** expressions. When returning, generate the assignment of the value on -** the stack to the corresponding table description. 'n' is the variable -** being handled, range [0, nvars - 1]. -*/ -static void initglobal (LexState *ls, int nvars, int firstidx, int n, - int line) { - if (n == nvars) { /* traversed all variables? */ - expdesc e; - int nexps = explist(ls, &e); /* read list of expressions */ - adjust_assign(ls, nvars, nexps, &e); - } - else { /* handle variable 'n' */ - FuncState *fs = ls->fs; - expdesc var; - TString *varname = getlocalvardesc(fs, firstidx + n)->vd.name; - buildglobal(ls, varname, &var); /* create global variable in 'var' */ - enterlevel(ls); /* control recursion depth */ - initglobal(ls, nvars, firstidx, n + 1, line); - leavelevel(ls); - checkglobal(ls, varname, line); - storevartop(fs, &var); - } -} - - -static void globalnames (LexState *ls, lu_byte defkind) { - FuncState *fs = ls->fs; - int nvars = 0; - int lastidx; /* index of last registered variable */ - do { /* for each name */ - TString *vname = str_checkname(ls); - lu_byte kind = getglobalattribute(ls, defkind); - lastidx = new_varkind(ls, vname, kind); - nvars++; - } while (testnext(ls, ',')); - if (testnext(ls, '=')) /* initialization? */ - initglobal(ls, nvars, lastidx - nvars + 1, 0, ls->linenumber); - fs->nactvar = cast_short(fs->nactvar + nvars); /* activate declaration */ -} - - -static void globalstat (LexState *ls) { - /* globalstat -> (GLOBAL) attrib '*' - globalstat -> (GLOBAL) attrib NAME attrib {',' NAME attrib} */ - FuncState *fs = ls->fs; - /* get prefixed attribute (if any); default is regular global variable */ - lu_byte defkind = getglobalattribute(ls, GDKREG); - if (!testnext(ls, '*')) - globalnames(ls, defkind); - else { - /* use NULL as name to represent '*' entries */ - new_varkind(ls, NULL, defkind); - fs->nactvar++; /* activate declaration */ - } -} - - -static void globalfunc (LexState *ls, int line) { - /* globalfunc -> (GLOBAL FUNCTION) NAME body */ - expdesc var, b; - FuncState *fs = ls->fs; - TString *fname = str_checkname(ls); - new_varkind(ls, fname, GDKREG); /* declare global variable */ - fs->nactvar++; /* enter its scope */ - buildglobal(ls, fname, &var); - body(ls, &b, 0, ls->linenumber); /* compile and return closure in 'b' */ - checkglobal(ls, fname, line); - luaK_storevar(fs, &var, &b); - luaK_fixline(fs, line); /* definition "happens" in the first line */ -} - - -static void globalstatfunc (LexState *ls, int line) { - /* stat -> GLOBAL globalfunc | GLOBAL globalstat */ - luaX_next(ls); /* skip 'global' */ - if (testnext(ls, TK_FUNCTION)) - globalfunc(ls, line); - else - globalstat(ls); -} - - -static int funcname (LexState *ls, expdesc *v) { - /* funcname -> NAME {fieldsel} [':' NAME] */ - int ismethod = 0; - singlevar(ls, v); - while (ls->t.token == '.') - fieldsel(ls, v); - if (ls->t.token == ':') { - ismethod = 1; - fieldsel(ls, v); - } - return ismethod; -} - - -static void funcstat (LexState *ls, int line) { - /* funcstat -> FUNCTION funcname body */ - int ismethod; - expdesc v, b; - luaX_next(ls); /* skip FUNCTION */ - ismethod = funcname(ls, &v); - check_readonly(ls, &v); - body(ls, &b, ismethod, line); - luaK_storevar(ls->fs, &v, &b); - luaK_fixline(ls->fs, line); /* definition "happens" in the first line */ -} - - -static void exprstat (LexState *ls) { - /* stat -> func | assignment */ - FuncState *fs = ls->fs; - struct LHS_assign v; - suffixedexp(ls, &v.v); - if (ls->t.token == '=' || ls->t.token == ',') { /* stat -> assignment ? */ - v.prev = NULL; - restassign(ls, &v, 1); - } - else { /* stat -> func */ - Instruction *inst; - check_condition(ls, v.v.k == VCALL, "syntax error"); - inst = &getinstruction(fs, &v.v); - SETARG_C(*inst, 1); /* call statement uses no results */ - } -} - - -static void retstat (LexState *ls) { - /* stat -> RETURN [explist] [';'] */ - FuncState *fs = ls->fs; - expdesc e; - int nret; /* number of values being returned */ - int first = luaY_nvarstack(fs); /* first slot to be returned */ - if (block_follow(ls, 1) || ls->t.token == ';') - nret = 0; /* return no values */ - else { - nret = explist(ls, &e); /* optional return values */ - if (hasmultret(e.k)) { - luaK_setmultret(fs, &e); - if (e.k == VCALL && nret == 1 && !fs->bl->insidetbc) { /* tail call? */ - SET_OPCODE(getinstruction(fs,&e), OP_TAILCALL); - lua_assert(GETARG_A(getinstruction(fs,&e)) == luaY_nvarstack(fs)); - } - nret = LUA_MULTRET; /* return all values */ - } - else { - if (nret == 1) /* only one single value? */ - first = luaK_exp2anyreg(fs, &e); /* can use original slot */ - else { /* values must go to the top of the stack */ - luaK_exp2nextreg(fs, &e); - lua_assert(nret == fs->freereg - first); - } - } - } - luaK_ret(fs, first, nret); - testnext(ls, ';'); /* skip optional semicolon */ -} - - -static void statement (LexState *ls) { - int line = ls->linenumber; /* may be needed for error messages */ - enterlevel(ls); - switch (ls->t.token) { - case ';': { /* stat -> ';' (empty statement) */ - luaX_next(ls); /* skip ';' */ - break; - } - case TK_IF: { /* stat -> ifstat */ - ifstat(ls, line); - break; - } - case TK_WHILE: { /* stat -> whilestat */ - whilestat(ls, line); - break; - } - case TK_DO: { /* stat -> DO block END */ - luaX_next(ls); /* skip DO */ - block(ls); - check_match(ls, TK_END, TK_DO, line); - break; - } - case TK_FOR: { /* stat -> forstat */ - forstat(ls, line); - break; - } - case TK_REPEAT: { /* stat -> repeatstat */ - repeatstat(ls, line); - break; - } - case TK_FUNCTION: { /* stat -> funcstat */ - funcstat(ls, line); - break; - } - case TK_LOCAL: { /* stat -> localstat */ - luaX_next(ls); /* skip LOCAL */ - if (testnext(ls, TK_FUNCTION)) /* local function? */ - localfunc(ls); - else - localstat(ls); - break; - } - case TK_GLOBAL: { /* stat -> globalstatfunc */ - globalstatfunc(ls, line); - break; - } - case TK_DBCOLON: { /* stat -> label */ - luaX_next(ls); /* skip double colon */ - labelstat(ls, str_checkname(ls), line); - break; - } - case TK_RETURN: { /* stat -> retstat */ - luaX_next(ls); /* skip RETURN */ - retstat(ls); - break; - } - case TK_BREAK: { /* stat -> breakstat */ - breakstat(ls, line); - break; - } - case TK_GOTO: { /* stat -> 'goto' NAME */ - luaX_next(ls); /* skip 'goto' */ - gotostat(ls, line); - break; - } -#if LUA_COMPAT_GLOBAL - case TK_NAME: { - /* compatibility code to parse global keyword when "global" - is not reserved */ - if (ls->t.seminfo.ts == ls->glbn) { /* current = "global"? */ - int lk = luaX_lookahead(ls); - if (lk == '<' || lk == TK_NAME || lk == '*' || lk == TK_FUNCTION) { - /* 'global ' or 'global name' or 'global *' or - 'global function' */ - globalstatfunc(ls, line); - break; - } - } /* else... */ - } -#endif - /* FALLTHROUGH */ - default: { /* stat -> func | assignment */ - exprstat(ls); - break; - } - } - lua_assert(ls->fs->f->maxstacksize >= ls->fs->freereg && - ls->fs->freereg >= luaY_nvarstack(ls->fs)); - ls->fs->freereg = luaY_nvarstack(ls->fs); /* free registers */ - leavelevel(ls); -} - -/* }====================================================================== */ - -/* }====================================================================== */ - - -/* -** compiles the main function, which is a regular vararg function with an -** upvalue named LUA_ENV -*/ -static void mainfunc (LexState *ls, FuncState *fs) { - BlockCnt bl; - Upvaldesc *env; - open_func(ls, fs, &bl); - setvararg(fs); /* main function is always vararg */ - env = allocupvalue(fs); /* ...set environment upvalue */ - env->instack = 1; - env->idx = 0; - env->kind = VDKREG; - env->name = ls->envn; - luaC_objbarrier(ls->L, fs->f, env->name); - luaX_next(ls); /* read first token */ - statlist(ls); /* parse main body */ - check(ls, TK_EOS); - close_func(ls); -} - - -LClosure *luaY_parser (lua_State *L, ZIO *z, Table *anchor, Mbuffer *buff, - Dyndata *dyd, const char *name, int firstchar) { - LexState lexstate; - FuncState funcstate; - LClosure *cl; - lexstate.h = anchor; /* table for scanner */ - cl = luaF_newLclosure(L, 1); /* create main closure */ - luaD_anchorobj(L, anchor, obj2gco(cl)); /* anchor it in scanner table */ - funcstate.f = cl->p = luaF_newproto(L); - luaC_objbarrier(L, cl, cl->p); - funcstate.f->source = luaS_new(L, name); /* create and anchor TString */ - luaC_objbarrier(L, funcstate.f, funcstate.f->source); - lexstate.buff = buff; - lexstate.dyd = dyd; - dyd->actvar.n = dyd->gt.n = dyd->label.n = 0; - luaX_setinput(L, &lexstate, z, funcstate.f->source, firstchar); - mainfunc(&lexstate, &funcstate); - lua_assert(!funcstate.prev && funcstate.nups == 1 && !lexstate.fs); - /* all scopes should be correctly finished */ - lua_assert(dyd->actvar.n == 0 && dyd->gt.n == 0 && dyd->label.n == 0); - return cl; -} - diff --git a/lib/lua/lparser.h b/lib/lua/lparser.h deleted file mode 100644 index 4fad6bd..0000000 --- a/lib/lua/lparser.h +++ /dev/null @@ -1,197 +0,0 @@ -/* -** $Id: lparser.h $ -** Lua Parser -** See Copyright Notice in lua.h -*/ - -#ifndef lparser_h -#define lparser_h - -#include "llimits.h" -#include "lobject.h" -#include "lzio.h" - - -/* -** Expression and variable descriptor. -** Code generation for variables and expressions can be delayed to allow -** optimizations; An 'expdesc' structure describes a potentially-delayed -** variable/expression. It has a description of its "main" value plus a -** list of conditional jumps that can also produce its value (generated -** by short-circuit operators 'and'/'or'). -*/ - -/* kinds of variables/expressions */ -typedef enum { - VVOID, /* when 'expdesc' describes the last expression of a list, - this kind means an empty list (so, no expression) */ - VNIL, /* constant nil */ - VTRUE, /* constant true */ - VFALSE, /* constant false */ - VK, /* constant in 'k'; info = index of constant in 'k' */ - VKFLT, /* floating constant; nval = numerical float value */ - VKINT, /* integer constant; ival = numerical integer value */ - VKSTR, /* string constant; strval = TString address; - (string is fixed by the scanner) */ - VNONRELOC, /* expression has its value in a fixed register; - info = result register */ - VLOCAL, /* local variable; var.ridx = register index; - var.vidx = relative index in 'actvar.arr' */ - VVARGVAR, /* vararg parameter; var.ridx = register index; - var.vidx = relative index in 'actvar.arr' */ - VGLOBAL, /* global variable; - info = relative index in 'actvar.arr' (or -1 for - implicit declaration) */ - VUPVAL, /* upvalue variable; info = index of upvalue in 'upvalues' */ - VCONST, /* compile-time variable; - info = absolute index in 'actvar.arr' */ - VINDEXED, /* indexed variable; - ind.t = table register; - ind.idx = key's R index; - ind.ro = true if it represents a read-only global; - ind.keystr = if key is a string, index in 'k' of that string; - -1 if key is not a string */ - VVARGIND, /* indexed vararg parameter; - ind.* as in VINDEXED */ - VINDEXUP, /* indexed upvalue; - ind.idx = key's K index; - ind.* as in VINDEXED */ - VINDEXI, /* indexed variable with constant integer; - ind.t = table register; - ind.idx = key's value */ - VINDEXSTR, /* indexed variable with literal string; - ind.idx = key's K index; - ind.* as in VINDEXED */ - VJMP, /* expression is a test/comparison; - info = pc of corresponding jump instruction */ - VRELOC, /* expression can put result in any register; - info = instruction pc */ - VCALL, /* expression is a function call; info = instruction pc */ - VVARARG /* vararg expression; info = instruction pc */ -} expkind; - - -#define vkisvar(k) (VLOCAL <= (k) && (k) <= VINDEXSTR) -#define vkisindexed(k) (VINDEXED <= (k) && (k) <= VINDEXSTR) - - -typedef struct expdesc { - expkind k; - union { - lua_Integer ival; /* for VKINT */ - lua_Number nval; /* for VKFLT */ - TString *strval; /* for VKSTR */ - int info; /* for generic use */ - struct { /* for indexed variables */ - short idx; /* index (R or "long" K) */ - lu_byte t; /* table (register or upvalue) */ - lu_byte ro; /* true if variable is read-only */ - int keystr; /* index in 'k' of string key, or -1 if not a string */ - } ind; - struct { /* for local variables */ - lu_byte ridx; /* register holding the variable */ - short vidx; /* index in 'actvar.arr' */ - } var; - } u; - int t; /* patch list of 'exit when true' */ - int f; /* patch list of 'exit when false' */ -} expdesc; - - -/* kinds of variables */ -#define VDKREG 0 /* regular local */ -#define RDKCONST 1 /* local constant */ -#define RDKVAVAR 2 /* vararg parameter */ -#define RDKTOCLOSE 3 /* to-be-closed */ -#define RDKCTC 4 /* local compile-time constant */ -#define GDKREG 5 /* regular global */ -#define GDKCONST 6 /* global constant */ - -/* variables that live in registers */ -#define varinreg(v) ((v)->vd.kind <= RDKTOCLOSE) - -/* test for global variables */ -#define varglobal(v) ((v)->vd.kind >= GDKREG) - - -/* description of an active variable */ -typedef union Vardesc { - struct { - TValuefields; /* constant value (if it is a compile-time constant) */ - lu_byte kind; - lu_byte ridx; /* register holding the variable */ - short pidx; /* index of the variable in the Proto's 'locvars' array */ - TString *name; /* variable name */ - } vd; - TValue k; /* constant value (if any) */ -} Vardesc; - - - -/* description of pending goto statements and label statements */ -typedef struct Labeldesc { - TString *name; /* label identifier */ - int pc; /* position in code */ - int line; /* line where it appeared */ - short nactvar; /* number of active variables in that position */ - lu_byte close; /* true for goto that escapes upvalues */ -} Labeldesc; - - -/* list of labels or gotos */ -typedef struct Labellist { - Labeldesc *arr; /* array */ - int n; /* number of entries in use */ - int size; /* array size */ -} Labellist; - - -/* dynamic structures used by the parser */ -typedef struct Dyndata { - struct { /* list of all active local variables */ - Vardesc *arr; - int n; - int size; - } actvar; - Labellist gt; /* list of pending gotos */ - Labellist label; /* list of active labels */ -} Dyndata; - - -/* control of blocks */ -struct BlockCnt; /* defined in lparser.c */ - - -/* state needed to generate code for a given function */ -typedef struct FuncState { - Proto *f; /* current function header */ - struct FuncState *prev; /* enclosing function */ - struct LexState *ls; /* lexical state */ - struct BlockCnt *bl; /* chain of current blocks */ - Table *kcache; /* cache for reusing constants */ - int pc; /* next position to code (equivalent to 'ncode') */ - int lasttarget; /* 'label' of last 'jump label' */ - int previousline; /* last line that was saved in 'lineinfo' */ - int nk; /* number of elements in 'k' */ - int np; /* number of elements in 'p' */ - int nabslineinfo; /* number of elements in 'abslineinfo' */ - int firstlocal; /* index of first local var (in Dyndata array) */ - int firstlabel; /* index of first label (in 'dyd->label->arr') */ - short ndebugvars; /* number of elements in 'f->locvars' */ - short nactvar; /* number of active variable declarations */ - lu_byte nups; /* number of upvalues */ - lu_byte freereg; /* first free register */ - lu_byte iwthabs; /* instructions issued since last absolute line info */ - lu_byte needclose; /* function needs to close upvalues when returning */ -} FuncState; - - -LUAI_FUNC lu_byte luaY_nvarstack (FuncState *fs); -LUAI_FUNC void luaY_checklimit (FuncState *fs, int v, int l, - const char *what); -LUAI_FUNC LClosure *luaY_parser (lua_State *L, ZIO *z, Table *anchor, - Mbuffer *buff, Dyndata *dyd, - const char *name, int firstchar); - - -#endif diff --git a/lib/lua/lprefix.h b/lib/lua/lprefix.h deleted file mode 100644 index 484f2ad..0000000 --- a/lib/lua/lprefix.h +++ /dev/null @@ -1,45 +0,0 @@ -/* -** $Id: lprefix.h $ -** Definitions for Lua code that must come before any other header file -** See Copyright Notice in lua.h -*/ - -#ifndef lprefix_h -#define lprefix_h - - -/* -** Allows POSIX/XSI stuff -*/ -#if !defined(LUA_USE_C89) /* { */ - -#if !defined(_XOPEN_SOURCE) -#define _XOPEN_SOURCE 600 -#elif _XOPEN_SOURCE == 0 -#undef _XOPEN_SOURCE /* use -D_XOPEN_SOURCE=0 to undefine it */ -#endif - -/* -** Allows manipulation of large files in gcc and some other compilers -*/ -#if !defined(LUA_32BITS) && !defined(_FILE_OFFSET_BITS) -#define _LARGEFILE_SOURCE 1 -#define _FILE_OFFSET_BITS 64 -#endif - -#endif /* } */ - - -/* -** Windows stuff -*/ -#if defined(_WIN32) /* { */ - -#if !defined(_CRT_SECURE_NO_WARNINGS) -#define _CRT_SECURE_NO_WARNINGS /* avoid warnings about ISO C functions */ -#endif - -#endif /* } */ - -#endif - diff --git a/lib/lua/lstate.c b/lib/lua/lstate.c deleted file mode 100644 index ada0b85..0000000 --- a/lib/lua/lstate.c +++ /dev/null @@ -1,425 +0,0 @@ -/* -** $Id: lstate.c $ -** Global State -** See Copyright Notice in lua.h -*/ - -#define lstate_c -#define LUA_CORE - -#include "lprefix.h" - - -#include -#include - -#include "lua.h" - -#include "lapi.h" -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lgc.h" -#include "llex.h" -#include "lmem.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" - - - -#define fromstate(L) (cast(LX *, cast(lu_byte *, (L)) - offsetof(LX, l))) - - -/* -** these macros allow user-specific actions when a thread is -** created/deleted -*/ -#if !defined(luai_userstateopen) -#define luai_userstateopen(L) ((void)L) -#endif - -#if !defined(luai_userstateclose) -#define luai_userstateclose(L) ((void)L) -#endif - -#if !defined(luai_userstatethread) -#define luai_userstatethread(L,L1) ((void)L) -#endif - -#if !defined(luai_userstatefree) -#define luai_userstatefree(L,L1) ((void)L) -#endif - - -/* -** set GCdebt to a new value keeping the real number of allocated -** objects (GCtotalobjs - GCdebt) invariant and avoiding overflows in -** 'GCtotalobjs'. -*/ -void luaE_setdebt (global_State *g, l_mem debt) { - l_mem tb = gettotalbytes(g); - lua_assert(tb > 0); - if (debt > MAX_LMEM - tb) - debt = MAX_LMEM - tb; /* will make GCtotalbytes == MAX_LMEM */ - g->GCtotalbytes = tb + debt; - g->GCdebt = debt; -} - - -CallInfo *luaE_extendCI (lua_State *L, int err) { - CallInfo *ci; - ci = luaM_reallocvector(L, NULL, 0, 1, CallInfo); - if (l_unlikely(ci == NULL)) { /* allocation failed? */ - if (err) - luaM_error(L); /* raise the error */ - return NULL; /* else only report it */ - } - ci->next = L->ci->next; - ci->previous = L->ci; - L->ci->next = ci; - if (ci->next) - ci->next->previous = ci; - ci->u.l.trap = 0; - L->nci++; - return ci; -} - - -/* -** free all CallInfo structures not in use by a thread -*/ -static void freeCI (lua_State *L) { - CallInfo *ci = L->ci; - CallInfo *next = ci->next; - ci->next = NULL; - while ((ci = next) != NULL) { - next = ci->next; - luaM_free(L, ci); - L->nci--; - } -} - - -/* -** free half of the CallInfo structures not in use by a thread, -** keeping the first one. -*/ -void luaE_shrinkCI (lua_State *L) { - CallInfo *ci = L->ci->next; /* first free CallInfo */ - CallInfo *next; - if (ci == NULL) - return; /* no extra elements */ - while ((next = ci->next) != NULL) { /* two extra elements? */ - CallInfo *next2 = next->next; /* next's next */ - ci->next = next2; /* remove next from the list */ - L->nci--; - luaM_free(L, next); /* free next */ - if (next2 == NULL) - break; /* no more elements */ - else { - next2->previous = ci; - ci = next2; /* continue */ - } - } -} - - -/* -** Called when 'getCcalls(L)' larger or equal to LUAI_MAXCCALLS. -** If equal, raises an overflow error. If value is larger than -** LUAI_MAXCCALLS (which means it is handling an overflow) but -** not much larger, does not report an error (to allow overflow -** handling to work). -*/ -void luaE_checkcstack (lua_State *L) { - if (getCcalls(L) == LUAI_MAXCCALLS) - luaG_runerror(L, "C stack overflow"); - else if (getCcalls(L) >= (LUAI_MAXCCALLS / 10 * 11)) - luaD_errerr(L); /* error while handling stack error */ -} - - -LUAI_FUNC void luaE_incCstack (lua_State *L) { - L->nCcalls++; - if (l_unlikely(getCcalls(L) >= LUAI_MAXCCALLS)) - luaE_checkcstack(L); -} - - -static void resetCI (lua_State *L) { - CallInfo *ci = L->ci = &L->base_ci; - ci->func.p = L->stack.p; - setnilvalue2s(ci->func.p); /* 'function' entry for basic 'ci' */ - ci->top.p = ci->func.p + 1 + LUA_MINSTACK; /* +1 for 'function' entry */ - ci->u.c.k = NULL; - ci->callstatus = CIST_C; - L->status = LUA_OK; - L->errfunc = 0; /* stack unwind can "throw away" the error function */ -} - - -static void stack_init (lua_State *L1, lua_State *L) { - int i; - /* initialize stack array */ - L1->stack.p = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, StackValue); - L1->tbclist.p = L1->stack.p; - for (i = 0; i < BASIC_STACK_SIZE + EXTRA_STACK; i++) - setnilvalue2s(L1->stack.p + i); /* erase new stack */ - L1->stack_last.p = L1->stack.p + BASIC_STACK_SIZE; - /* initialize first ci */ - resetCI(L1); - L1->top.p = L1->stack.p + 1; /* +1 for 'function' entry */ -} - - -static void freestack (lua_State *L) { - if (L->stack.p == NULL) - return; /* stack not completely built yet */ - L->ci = &L->base_ci; /* free the entire 'ci' list */ - freeCI(L); - lua_assert(L->nci == 0); - /* free stack */ - luaM_freearray(L, L->stack.p, cast_sizet(stacksize(L) + EXTRA_STACK)); -} - - -/* -** Create registry table and its predefined values -*/ -static void init_registry (lua_State *L, global_State *g) { - /* create registry */ - TValue aux; - Table *registry = luaH_new(L); - sethvalue(L, &g->l_registry, registry); - luaH_resize(L, registry, LUA_RIDX_LAST, 0); - /* registry[1] = false */ - setbfvalue(&aux); - luaH_setint(L, registry, 1, &aux); - /* registry[LUA_RIDX_MAINTHREAD] = L */ - setthvalue(L, &aux, L); - luaH_setint(L, registry, LUA_RIDX_MAINTHREAD, &aux); - /* registry[LUA_RIDX_GLOBALS] = new table (table of globals) */ - sethvalue(L, &aux, luaH_new(L)); - luaH_setint(L, registry, LUA_RIDX_GLOBALS, &aux); -} - - -/* -** open parts of the state that may cause memory-allocation errors. -*/ -static void f_luaopen (lua_State *L, void *ud) { - global_State *g = G(L); - UNUSED(ud); - stack_init(L, L); /* init stack */ - init_registry(L, g); - luaS_init(L); - luaT_init(L); - luaX_init(L); - g->gcstp = 0; /* allow gc */ - setnilvalue(&g->nilvalue); /* now state is complete */ - luai_userstateopen(L); -} - - -/* -** preinitialize a thread with consistent values without allocating -** any memory (to avoid errors) -*/ -static void preinit_thread (lua_State *L, global_State *g) { - G(L) = g; - L->stack.p = NULL; - L->ci = NULL; - L->nci = 0; - L->twups = L; /* thread has no upvalues */ - L->nCcalls = 0; - L->errorJmp = NULL; - L->hook = NULL; - L->hookmask = 0; - L->basehookcount = 0; - L->allowhook = 1; - resethookcount(L); - L->openupval = NULL; - L->status = LUA_OK; - L->errfunc = 0; - L->oldpc = 0; - L->base_ci.previous = L->base_ci.next = NULL; -} - - -lu_mem luaE_threadsize (lua_State *L) { - lu_mem sz = cast(lu_mem, sizeof(LX)) - + cast_uint(L->nci) * sizeof(CallInfo); - if (L->stack.p != NULL) - sz += cast_uint(stacksize(L) + EXTRA_STACK) * sizeof(StackValue); - return sz; -} - - -static void close_state (lua_State *L) { - global_State *g = G(L); - if (!completestate(g)) /* closing a partially built state? */ - luaC_freeallobjects(L); /* just collect its objects */ - else { /* closing a fully built state */ - resetCI(L); - luaD_closeprotected(L, 1, LUA_OK); /* close all upvalues */ - L->top.p = L->stack.p + 1; /* empty the stack to run finalizers */ - luaC_freeallobjects(L); /* collect all objects */ - luai_userstateclose(L); - } - luaM_freearray(L, G(L)->strt.hash, cast_sizet(G(L)->strt.size)); - freestack(L); - lua_assert(gettotalbytes(g) == sizeof(global_State)); - (*g->frealloc)(g->ud, g, sizeof(global_State), 0); /* free main block */ -} - - -LUA_API lua_State *lua_newthread (lua_State *L) { - global_State *g = G(L); - GCObject *o; - lua_State *L1; - lua_lock(L); - luaC_checkGC(L); - /* create new thread */ - o = luaC_newobjdt(L, LUA_TTHREAD, sizeof(LX), offsetof(LX, l)); - L1 = gco2th(o); - /* anchor it on L stack */ - setthvalue2s(L, L->top.p, L1); - api_incr_top(L); - preinit_thread(L1, g); - L1->hookmask = L->hookmask; - L1->basehookcount = L->basehookcount; - L1->hook = L->hook; - resethookcount(L1); - /* initialize L1 extra space */ - memcpy(lua_getextraspace(L1), lua_getextraspace(mainthread(g)), - LUA_EXTRASPACE); - luai_userstatethread(L, L1); - stack_init(L1, L); /* init stack */ - lua_unlock(L); - return L1; -} - - -void luaE_freethread (lua_State *L, lua_State *L1) { - LX *l = fromstate(L1); - luaF_closeupval(L1, L1->stack.p); /* close all upvalues */ - lua_assert(L1->openupval == NULL); - luai_userstatefree(L, L1); - freestack(L1); - luaM_free(L, l); -} - - -TStatus luaE_resetthread (lua_State *L, TStatus status) { - resetCI(L); - if (status == LUA_YIELD) - status = LUA_OK; - status = luaD_closeprotected(L, 1, status); - if (status != LUA_OK) /* errors? */ - luaD_seterrorobj(L, status, L->stack.p + 1); - else - L->top.p = L->stack.p + 1; - luaD_reallocstack(L, cast_int(L->ci->top.p - L->stack.p), 0); - return status; -} - - -LUA_API int lua_closethread (lua_State *L, lua_State *from) { - TStatus status; - lua_lock(L); - L->nCcalls = (from) ? getCcalls(from) : 0; - status = luaE_resetthread(L, L->status); - if (L == from) /* closing itself? */ - luaD_throwbaselevel(L, status); - lua_unlock(L); - return APIstatus(status); -} - - -LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud, unsigned seed) { - int i; - lua_State *L; - global_State *g = cast(global_State*, - (*f)(ud, NULL, LUA_TTHREAD, sizeof(global_State))); - if (g == NULL) return NULL; - L = &g->mainth.l; - L->tt = LUA_VTHREAD; - g->currentwhite = bitmask(WHITE0BIT); - L->marked = luaC_white(g); - preinit_thread(L, g); - g->allgc = obj2gco(L); /* by now, only object is the main thread */ - L->next = NULL; - incnny(L); /* main thread is always non yieldable */ - g->frealloc = f; - g->ud = ud; - g->warnf = NULL; - g->ud_warn = NULL; - g->seed = seed; - g->gcstp = GCSTPGC; /* no GC while building state */ - g->strt.size = g->strt.nuse = 0; - g->strt.hash = NULL; - setnilvalue(&g->l_registry); - g->panic = NULL; - g->gcstate = GCSpause; - g->gckind = KGC_INC; - g->gcstopem = 0; - g->gcemergency = 0; - g->finobj = g->tobefnz = g->fixedgc = NULL; - g->firstold1 = g->survival = g->old1 = g->reallyold = NULL; - g->finobjsur = g->finobjold1 = g->finobjrold = NULL; - g->sweepgc = NULL; - g->gray = g->grayagain = NULL; - g->weak = g->ephemeron = g->allweak = NULL; - g->twups = NULL; - g->GCtotalbytes = sizeof(global_State); - g->GCmarked = 0; - g->GCdebt = 0; - setivalue(&g->nilvalue, 0); /* to signal that state is not yet built */ - setgcparam(g, PAUSE, LUAI_GCPAUSE); - setgcparam(g, STEPMUL, LUAI_GCMUL); - setgcparam(g, STEPSIZE, LUAI_GCSTEPSIZE); - setgcparam(g, MINORMUL, LUAI_GENMINORMUL); - setgcparam(g, MINORMAJOR, LUAI_MINORMAJOR); - setgcparam(g, MAJORMINOR, LUAI_MAJORMINOR); - for (i=0; i < LUA_NUMTYPES; i++) g->mt[i] = NULL; - if (luaD_rawrunprotected(L, f_luaopen, NULL) != LUA_OK) { - /* memory allocation error: free partial state */ - close_state(L); - L = NULL; - } - return L; -} - - -LUA_API void lua_close (lua_State *L) { - lua_lock(L); - L = mainthread(G(L)); /* only the main thread can be closed */ - close_state(L); -} - - -void luaE_warning (lua_State *L, const char *msg, int tocont) { - lua_WarnFunction wf = G(L)->warnf; - if (wf != NULL) - wf(G(L)->ud_warn, msg, tocont); -} - - -/* -** Generate a warning from an error message -*/ -void luaE_warnerror (lua_State *L, const char *where) { - TValue *errobj = s2v(L->top.p - 1); /* error object */ - const char *msg = (ttisstring(errobj)) - ? getstr(tsvalue(errobj)) - : "error object is not a string"; - /* produce warning "error in %s (%s)" (where, msg) */ - luaE_warning(L, "error in ", 1); - luaE_warning(L, where, 1); - luaE_warning(L, " (", 1); - luaE_warning(L, msg, 1); - luaE_warning(L, ")", 0); -} - diff --git a/lib/lua/lstate.h b/lib/lua/lstate.h deleted file mode 100644 index 30a560a..0000000 --- a/lib/lua/lstate.h +++ /dev/null @@ -1,451 +0,0 @@ -/* -** $Id: lstate.h $ -** Global State -** See Copyright Notice in lua.h -*/ - -#ifndef lstate_h -#define lstate_h - -#include "lua.h" - - -/* Some header files included here need this definition */ -typedef struct CallInfo CallInfo; - - -#include "lobject.h" -#include "ltm.h" -#include "lzio.h" - - -/* -** Some notes about garbage-collected objects: All objects in Lua must -** be kept somehow accessible until being freed, so all objects always -** belong to one (and only one) of these lists, using field 'next' of -** the 'CommonHeader' for the link: -** -** 'allgc': all objects not marked for finalization; -** 'finobj': all objects marked for finalization; -** 'tobefnz': all objects ready to be finalized; -** 'fixedgc': all objects that are not to be collected (currently -** only small strings, such as reserved words). -** -** For the generational collector, some of these lists have marks for -** generations. Each mark points to the first element in the list for -** that particular generation; that generation goes until the next mark. -** -** 'allgc' -> 'survival': new objects; -** 'survival' -> 'old': objects that survived one collection; -** 'old1' -> 'reallyold': objects that became old in last collection; -** 'reallyold' -> NULL: objects old for more than one cycle. -** -** 'finobj' -> 'finobjsur': new objects marked for finalization; -** 'finobjsur' -> 'finobjold1': survived """"; -** 'finobjold1' -> 'finobjrold': just old """"; -** 'finobjrold' -> NULL: really old """". -** -** All lists can contain elements older than their main ages, due -** to 'luaC_checkfinalizer' and 'udata2finalize', which move -** objects between the normal lists and the "marked for finalization" -** lists. Moreover, barriers can age young objects in young lists as -** OLD0, which then become OLD1. However, a list never contains -** elements younger than their main ages. -** -** The generational collector also uses a pointer 'firstold1', which -** points to the first OLD1 object in the list. It is used to optimize -** 'markold'. (Potentially OLD1 objects can be anywhere between 'allgc' -** and 'reallyold', but often the list has no OLD1 objects or they are -** after 'old1'.) Note the difference between it and 'old1': -** 'firstold1': no OLD1 objects before this point; there can be all -** ages after it. -** 'old1': no objects younger than OLD1 after this point. -*/ - -/* -** Moreover, there is another set of lists that control gray objects. -** These lists are linked by fields 'gclist'. (All objects that -** can become gray have such a field. The field is not the same -** in all objects, but it always has this name.) Any gray object -** must belong to one of these lists, and all objects in these lists -** must be gray (with two exceptions explained below): -** -** 'gray': regular gray objects, still waiting to be visited. -** 'grayagain': objects that must be revisited at the atomic phase. -** That includes -** - black objects got in a write barrier; -** - all kinds of weak tables during propagation phase; -** - all threads. -** 'weak': tables with weak values to be cleared; -** 'ephemeron': ephemeron tables with white->white entries; -** 'allweak': tables with weak keys and/or weak values to be cleared. -** -** The exceptions to that "gray rule" are: -** - TOUCHED2 objects in generational mode stay in a gray list (because -** they must be visited again at the end of the cycle), but they are -** marked black because assignments to them must activate barriers (to -** move them back to TOUCHED1). -** - Open upvalues are kept gray to avoid barriers, but they stay out -** of gray lists. (They don't even have a 'gclist' field.) -*/ - - - -/* -** About 'nCcalls': This count has two parts: the lower 16 bits counts -** the number of recursive invocations in the C stack; the higher -** 16 bits counts the number of non-yieldable calls in the stack. -** (They are together so that we can change and save both with one -** instruction.) -*/ - - -/* true if this thread does not have non-yieldable calls in the stack */ -#define yieldable(L) (((L)->nCcalls & 0xffff0000) == 0) - -/* real number of C calls */ -#define getCcalls(L) ((L)->nCcalls & 0xffff) - - -/* Increment the number of non-yieldable calls */ -#define incnny(L) ((L)->nCcalls += 0x10000) - -/* Decrement the number of non-yieldable calls */ -#define decnny(L) ((L)->nCcalls -= 0x10000) - -/* Non-yieldable call increment */ -#define nyci (0x10000 | 1) - - - - -struct lua_longjmp; /* defined in ldo.c */ - - -/* -** Atomic type (relative to signals) to better ensure that 'lua_sethook' -** is thread safe -*/ -#if !defined(l_signalT) -#include -#define l_signalT sig_atomic_t -#endif - - -/* -** Extra stack space to handle TM calls and some other extras. This -** space is not included in 'stack_last'. It is used only to avoid stack -** checks, either because the element will be promptly popped or because -** there will be a stack check soon after the push. Function frames -** never use this extra space, so it does not need to be kept clean. -*/ -#define EXTRA_STACK 5 - - -/* -** Size of cache for strings in the API. 'N' is the number of -** sets (better be a prime) and "M" is the size of each set. -** (M == 1 makes a direct cache.) -*/ -#if !defined(STRCACHE_N) -#define STRCACHE_N 53 -#define STRCACHE_M 2 -#endif - - -#define BASIC_STACK_SIZE (2*LUA_MINSTACK) - -#define stacksize(th) cast_int((th)->stack_last.p - (th)->stack.p) - - -/* kinds of Garbage Collection */ -#define KGC_INC 0 /* incremental gc */ -#define KGC_GENMINOR 1 /* generational gc in minor (regular) mode */ -#define KGC_GENMAJOR 2 /* generational in major mode */ - - -typedef struct stringtable { - TString **hash; /* array of buckets (linked lists of strings) */ - int nuse; /* number of elements */ - int size; /* number of buckets */ -} stringtable; - - -/* -** Information about a call. -** About union 'u': -** - field 'l' is used only for Lua functions; -** - field 'c' is used only for C functions. -** About union 'u2': -** - field 'funcidx' is used only by C functions while doing a -** protected call; -** - field 'nyield' is used only while a function is "doing" an -** yield (from the yield until the next resume); -** - field 'nres' is used only while closing tbc variables when -** returning from a function; -*/ -struct CallInfo { - StkIdRel func; /* function index in the stack */ - StkIdRel top; /* top for this function */ - struct CallInfo *previous, *next; /* dynamic call link */ - union { - struct { /* only for Lua functions */ - const Instruction *savedpc; - volatile l_signalT trap; /* function is tracing lines/counts */ - int nextraargs; /* # of extra arguments in vararg functions */ - } l; - struct { /* only for C functions */ - lua_KFunction k; /* continuation in case of yields */ - ptrdiff_t old_errfunc; - lua_KContext ctx; /* context info. in case of yields */ - } c; - } u; - union { - int funcidx; /* called-function index */ - int nyield; /* number of values yielded */ - int nres; /* number of values returned */ - } u2; - l_uint32 callstatus; -}; - - -/* -** Maximum expected number of results from a function -** (must fit in CIST_NRESULTS). -*/ -#define MAXRESULTS 250 - - -/* -** Bits in CallInfo status -*/ -/* bits 0-7 are the expected number of results from this function + 1 */ -#define CIST_NRESULTS 0xffu - -/* bits 8-11 count call metamethods (and their extra arguments) */ -#define CIST_CCMT 8 /* the offset, not the mask */ -#define MAX_CCMT (0xfu << CIST_CCMT) - -/* Bits 12-14 are used for CIST_RECST (see below) */ -#define CIST_RECST 12 /* the offset, not the mask */ - -/* call is running a C function (still in first 16 bits) */ -#define CIST_C (1u << (CIST_RECST + 3)) -/* call is on a fresh "luaV_execute" frame */ -#define CIST_FRESH (cast(l_uint32, CIST_C) << 1) -/* function is closing tbc variables */ -#define CIST_CLSRET (CIST_FRESH << 1) -/* function has tbc variables to close */ -#define CIST_TBC (CIST_CLSRET << 1) -/* original value of 'allowhook' */ -#define CIST_OAH (CIST_TBC << 1) -/* call is running a debug hook */ -#define CIST_HOOKED (CIST_OAH << 1) -/* doing a yieldable protected call */ -#define CIST_YPCALL (CIST_HOOKED << 1) -/* call was tail called */ -#define CIST_TAIL (CIST_YPCALL << 1) -/* last hook called yielded */ -#define CIST_HOOKYIELD (CIST_TAIL << 1) -/* function "called" a finalizer */ -#define CIST_FIN (CIST_HOOKYIELD << 1) - - -#define get_nresults(cs) (cast_int((cs) & CIST_NRESULTS) - 1) - -/* -** Field CIST_RECST stores the "recover status", used to keep the error -** status while closing to-be-closed variables in coroutines, so that -** Lua can correctly resume after an yield from a __close method called -** because of an error. (Three bits are enough for error status.) -*/ -#define getcistrecst(ci) (((ci)->callstatus >> CIST_RECST) & 7) -#define setcistrecst(ci,st) \ - check_exp(((st) & 7) == (st), /* status must fit in three bits */ \ - ((ci)->callstatus = ((ci)->callstatus & ~(7u << CIST_RECST)) \ - | (cast(l_uint32, st) << CIST_RECST))) - - -/* active function is a Lua function */ -#define isLua(ci) (!((ci)->callstatus & CIST_C)) - -/* call is running Lua code (not a hook) */ -#define isLuacode(ci) (!((ci)->callstatus & (CIST_C | CIST_HOOKED))) - - -#define setoah(ci,v) \ - ((ci)->callstatus = ((v) ? (ci)->callstatus | CIST_OAH \ - : (ci)->callstatus & ~CIST_OAH)) -#define getoah(ci) (((ci)->callstatus & CIST_OAH) ? 1 : 0) - - -/* -** 'per thread' state -*/ -struct lua_State { - CommonHeader; - lu_byte allowhook; - TStatus status; - StkIdRel top; /* first free slot in the stack */ - struct global_State *l_G; - CallInfo *ci; /* call info for current function */ - StkIdRel stack_last; /* end of stack (last element + 1) */ - StkIdRel stack; /* stack base */ - UpVal *openupval; /* list of open upvalues in this stack */ - StkIdRel tbclist; /* list of to-be-closed variables */ - GCObject *gclist; - struct lua_State *twups; /* list of threads with open upvalues */ - struct lua_longjmp *errorJmp; /* current error recover point */ - CallInfo base_ci; /* CallInfo for first level (C host) */ - volatile lua_Hook hook; - ptrdiff_t errfunc; /* current error handling function (stack index) */ - l_uint32 nCcalls; /* number of nested non-yieldable or C calls */ - int oldpc; /* last pc traced */ - int nci; /* number of items in 'ci' list */ - int basehookcount; - int hookcount; - volatile l_signalT hookmask; - struct { /* info about transferred values (for call/return hooks) */ - int ftransfer; /* offset of first value transferred */ - int ntransfer; /* number of values transferred */ - } transferinfo; -}; - - -/* -** thread state + extra space -*/ -typedef struct LX { - lu_byte extra_[LUA_EXTRASPACE]; - lua_State l; -} LX; - - -/* -** 'global state', shared by all threads of this state -*/ -typedef struct global_State { - lua_Alloc frealloc; /* function to reallocate memory */ - void *ud; /* auxiliary data to 'frealloc' */ - l_mem GCtotalbytes; /* number of bytes currently allocated + debt */ - l_mem GCdebt; /* bytes counted but not yet allocated */ - l_mem GCmarked; /* number of objects marked in a GC cycle */ - l_mem GCmajorminor; /* auxiliary counter to control major-minor shifts */ - stringtable strt; /* hash table for strings */ - TValue l_registry; - TValue nilvalue; /* a nil value */ - unsigned int seed; /* randomized seed for hashes */ - lu_byte gcparams[LUA_GCPN]; - lu_byte currentwhite; - lu_byte gcstate; /* state of garbage collector */ - lu_byte gckind; /* kind of GC running */ - lu_byte gcstopem; /* stops emergency collections */ - lu_byte gcstp; /* control whether GC is running */ - lu_byte gcemergency; /* true if this is an emergency collection */ - GCObject *allgc; /* list of all collectable objects */ - GCObject **sweepgc; /* current position of sweep in list */ - GCObject *finobj; /* list of collectable objects with finalizers */ - GCObject *gray; /* list of gray objects */ - GCObject *grayagain; /* list of objects to be traversed atomically */ - GCObject *weak; /* list of tables with weak values */ - GCObject *ephemeron; /* list of ephemeron tables (weak keys) */ - GCObject *allweak; /* list of all-weak tables */ - GCObject *tobefnz; /* list of userdata to be GC */ - GCObject *fixedgc; /* list of objects not to be collected */ - /* fields for generational collector */ - GCObject *survival; /* start of objects that survived one GC cycle */ - GCObject *old1; /* start of old1 objects */ - GCObject *reallyold; /* objects more than one cycle old ("really old") */ - GCObject *firstold1; /* first OLD1 object in the list (if any) */ - GCObject *finobjsur; /* list of survival objects with finalizers */ - GCObject *finobjold1; /* list of old1 objects with finalizers */ - GCObject *finobjrold; /* list of really old objects with finalizers */ - struct lua_State *twups; /* list of threads with open upvalues */ - lua_CFunction panic; /* to be called in unprotected errors */ - TString *memerrmsg; /* message for memory-allocation errors */ - TString *tmname[TM_N]; /* array with tag-method names */ - struct Table *mt[LUA_NUMTYPES]; /* metatables for basic types */ - TString *strcache[STRCACHE_N][STRCACHE_M]; /* cache for strings in API */ - lua_WarnFunction warnf; /* warning function */ - void *ud_warn; /* auxiliary data to 'warnf' */ - LX mainth; /* main thread of this state */ -} global_State; - - -#define G(L) (L->l_G) -#define mainthread(G) (&(G)->mainth.l) - -/* -** 'g->nilvalue' being a nil value flags that the state was completely -** build. -*/ -#define completestate(g) ttisnil(&g->nilvalue) - - -/* -** Union of all collectable objects -** ISO C99, 6.5.2.3 p.5: -** "if a union contains several structures that share a common initial -** sequence [...], and if the union object currently contains one -** of these structures, it is permitted to inspect the common initial -** part of any of them anywhere that a declaration of the complete type -** of the union is visible." -*/ -union GCUnion { - GCObject gc; /* common header */ - struct TString ts; - struct Udata u; - union Closure cl; - struct Table h; - struct Proto p; - struct lua_State th; /* thread */ - struct UpVal upv; -}; - - -/* macros to convert a GCObject into a specific value -** ISO C99, 6.3.2.2 p.7: -** "A pointer to an object or incomplete type may be converted to a -** pointer to a different object or incomplete type. If the resulting -** pointer is not correctly aligned for the pointed-to type, the -** behavior is undefined. Otherwise, when converted back again, the -** result shall compare equal to the original pointer." -*/ -#define gco2(v,T,o) check_exp((o)->tt == v, cast(T*, o)) -#define gco2nv(t,T,o) check_exp(novariant((o)->tt) == t, cast(T*, o)) -#define gco2ts(o) gco2nv(LUA_TSTRING, TString, o) -#define gco2u(o) gco2(LUA_VUSERDATA, Udata, o) -#define gco2lcl(o) (&gco2(LUA_VLCL, Closure, o)->l) -#define gco2ccl(o) (&gco2(LUA_VCCL, Closure, o)->c) -#define gco2cl(o) gco2nv(LUA_TFUNCTION, Closure, o) -#define gco2t(o) gco2(LUA_VTABLE, Table, o) -#define gco2p(o) gco2(LUA_VPROTO, Proto, o) -#define gco2th(o) gco2(LUA_VTHREAD, lua_State, o) -#define gco2upv(o) gco2(LUA_VUPVAL, UpVal, o) - - -/* -** macro to convert a Lua object into a GCObject -*/ -#define obj2gco(v) \ - check_exp(novariant((v)->tt) >= LUA_TSTRING, cast(GCObject*, v)) - - -/* actual number of total memory allocated */ -#define gettotalbytes(g) ((g)->GCtotalbytes - (g)->GCdebt) - - -LUAI_FUNC void luaE_setdebt (global_State *g, l_mem debt); -LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1); -LUAI_FUNC lu_mem luaE_threadsize (lua_State *L); -LUAI_FUNC CallInfo *luaE_extendCI (lua_State *L, int err); -LUAI_FUNC void luaE_shrinkCI (lua_State *L); -LUAI_FUNC void luaE_checkcstack (lua_State *L); -LUAI_FUNC void luaE_incCstack (lua_State *L); -LUAI_FUNC void luaE_warning (lua_State *L, const char *msg, int tocont); -LUAI_FUNC void luaE_warnerror (lua_State *L, const char *where); -LUAI_FUNC TStatus luaE_resetthread (lua_State *L, TStatus status); - - -#endif - diff --git a/lib/lua/lstring.c b/lib/lua/lstring.c deleted file mode 100644 index 7563514..0000000 --- a/lib/lua/lstring.c +++ /dev/null @@ -1,353 +0,0 @@ -/* -** $Id: lstring.c $ -** String table (keeps all strings handled by Lua) -** See Copyright Notice in lua.h -*/ - -#define lstring_c -#define LUA_CORE - -#include "lprefix.h" - - -#include - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" -#include "lstring.h" - - -/* -** Maximum size for string table. -*/ -#define MAXSTRTB cast_int(luaM_limitN(INT_MAX, TString*)) - -/* -** Initial size for the string table (must be power of 2). -** The Lua core alone registers ~50 strings (reserved words + -** metaevent keys + a few others). Libraries would typically add -** a few dozens more. -*/ -#if !defined(MINSTRTABSIZE) -#define MINSTRTABSIZE 128 -#endif - - -/* -** generic equality for strings -*/ -int luaS_eqstr (TString *a, TString *b) { - size_t len1, len2; - const char *s1 = getlstr(a, len1); - const char *s2 = getlstr(b, len2); - return ((len1 == len2) && /* equal length and ... */ - (memcmp(s1, s2, len1) == 0)); /* equal contents */ -} - - -static unsigned luaS_hash (const char *str, size_t l, unsigned seed) { - unsigned int h = seed ^ cast_uint(l); - for (; l > 0; l--) - h ^= ((h<<5) + (h>>2) + cast_byte(str[l - 1])); - return h; -} - - -unsigned luaS_hashlongstr (TString *ts) { - lua_assert(ts->tt == LUA_VLNGSTR); - if (ts->extra == 0) { /* no hash? */ - size_t len = ts->u.lnglen; - ts->hash = luaS_hash(getlngstr(ts), len, ts->hash); - ts->extra = 1; /* now it has its hash */ - } - return ts->hash; -} - - -static void tablerehash (TString **vect, int osize, int nsize) { - int i; - for (i = osize; i < nsize; i++) /* clear new elements */ - vect[i] = NULL; - for (i = 0; i < osize; i++) { /* rehash old part of the array */ - TString *p = vect[i]; - vect[i] = NULL; - while (p) { /* for each string in the list */ - TString *hnext = p->u.hnext; /* save next */ - unsigned int h = lmod(p->hash, nsize); /* new position */ - p->u.hnext = vect[h]; /* chain it into array */ - vect[h] = p; - p = hnext; - } - } -} - - -/* -** Resize the string table. If allocation fails, keep the current size. -** (This can degrade performance, but any non-zero size should work -** correctly.) -*/ -void luaS_resize (lua_State *L, int nsize) { - stringtable *tb = &G(L)->strt; - int osize = tb->size; - TString **newvect; - if (nsize < osize) /* shrinking table? */ - tablerehash(tb->hash, osize, nsize); /* depopulate shrinking part */ - newvect = luaM_reallocvector(L, tb->hash, osize, nsize, TString*); - if (l_unlikely(newvect == NULL)) { /* reallocation failed? */ - if (nsize < osize) /* was it shrinking table? */ - tablerehash(tb->hash, nsize, osize); /* restore to original size */ - /* leave table as it was */ - } - else { /* allocation succeeded */ - tb->hash = newvect; - tb->size = nsize; - if (nsize > osize) - tablerehash(newvect, osize, nsize); /* rehash for new size */ - } -} - - -/* -** Clear API string cache. (Entries cannot be empty, so fill them with -** a non-collectable string.) -*/ -void luaS_clearcache (global_State *g) { - int i, j; - for (i = 0; i < STRCACHE_N; i++) - for (j = 0; j < STRCACHE_M; j++) { - if (iswhite(g->strcache[i][j])) /* will entry be collected? */ - g->strcache[i][j] = g->memerrmsg; /* replace it with something fixed */ - } -} - - -/* -** Initialize the string table and the string cache -*/ -void luaS_init (lua_State *L) { - global_State *g = G(L); - int i, j; - stringtable *tb = &G(L)->strt; - tb->hash = luaM_newvector(L, MINSTRTABSIZE, TString*); - tablerehash(tb->hash, 0, MINSTRTABSIZE); /* clear array */ - tb->size = MINSTRTABSIZE; - /* pre-create memory-error message */ - g->memerrmsg = luaS_newliteral(L, MEMERRMSG); - luaC_fix(L, obj2gco(g->memerrmsg)); /* it should never be collected */ - for (i = 0; i < STRCACHE_N; i++) /* fill cache with valid strings */ - for (j = 0; j < STRCACHE_M; j++) - g->strcache[i][j] = g->memerrmsg; -} - - -size_t luaS_sizelngstr (size_t len, int kind) { - switch (kind) { - case LSTRREG: /* regular long string */ - /* don't need 'falloc'/'ud', but need space for content */ - return offsetof(TString, falloc) + (len + 1) * sizeof(char); - case LSTRFIX: /* fixed external long string */ - /* don't need 'falloc'/'ud' */ - return offsetof(TString, falloc); - default: /* external long string with deallocation */ - lua_assert(kind == LSTRMEM); - return sizeof(TString); - } -} - - -/* -** creates a new string object -*/ -static TString *createstrobj (lua_State *L, size_t totalsize, lu_byte tag, - unsigned h) { - TString *ts; - GCObject *o; - o = luaC_newobj(L, tag, totalsize); - ts = gco2ts(o); - ts->hash = h; - ts->extra = 0; - return ts; -} - - -TString *luaS_createlngstrobj (lua_State *L, size_t l) { - size_t totalsize = luaS_sizelngstr(l, LSTRREG); - TString *ts = createstrobj(L, totalsize, LUA_VLNGSTR, G(L)->seed); - ts->u.lnglen = l; - ts->shrlen = LSTRREG; /* signals that it is a regular long string */ - ts->contents = cast_charp(ts) + offsetof(TString, falloc); - ts->contents[l] = '\0'; /* ending 0 */ - return ts; -} - - -void luaS_remove (lua_State *L, TString *ts) { - stringtable *tb = &G(L)->strt; - TString **p = &tb->hash[lmod(ts->hash, tb->size)]; - while (*p != ts) /* find previous element */ - p = &(*p)->u.hnext; - *p = (*p)->u.hnext; /* remove element from its list */ - tb->nuse--; -} - - -static void growstrtab (lua_State *L, stringtable *tb) { - if (l_unlikely(tb->nuse == INT_MAX)) { /* too many strings? */ - luaC_fullgc(L, 1); /* try to free some... */ - if (tb->nuse == INT_MAX) /* still too many? */ - luaM_error(L); /* cannot even create a message... */ - } - if (tb->size <= MAXSTRTB / 2) /* can grow string table? */ - luaS_resize(L, tb->size * 2); -} - - -/* -** Checks whether short string exists and reuses it or creates a new one. -*/ -static TString *internshrstr (lua_State *L, const char *str, size_t l) { - TString *ts; - global_State *g = G(L); - stringtable *tb = &g->strt; - unsigned int h = luaS_hash(str, l, g->seed); - TString **list = &tb->hash[lmod(h, tb->size)]; - lua_assert(str != NULL); /* otherwise 'memcmp'/'memcpy' are undefined */ - for (ts = *list; ts != NULL; ts = ts->u.hnext) { - if (l == cast_uint(ts->shrlen) && - (memcmp(str, getshrstr(ts), l * sizeof(char)) == 0)) { - /* found! */ - if (isdead(g, ts)) /* dead (but not collected yet)? */ - changewhite(ts); /* resurrect it */ - return ts; - } - } - /* else must create a new string */ - if (tb->nuse >= tb->size) { /* need to grow string table? */ - growstrtab(L, tb); - list = &tb->hash[lmod(h, tb->size)]; /* rehash with new size */ - } - ts = createstrobj(L, sizestrshr(l), LUA_VSHRSTR, h); - ts->shrlen = cast(ls_byte, l); - getshrstr(ts)[l] = '\0'; /* ending 0 */ - memcpy(getshrstr(ts), str, l * sizeof(char)); - ts->u.hnext = *list; - *list = ts; - tb->nuse++; - return ts; -} - - -/* -** new string (with explicit length) -*/ -TString *luaS_newlstr (lua_State *L, const char *str, size_t l) { - if (l <= LUAI_MAXSHORTLEN) /* short string? */ - return internshrstr(L, str, l); - else { - TString *ts; - if (l_unlikely(l * sizeof(char) >= (MAX_SIZE - sizeof(TString)))) - luaM_toobig(L); - ts = luaS_createlngstrobj(L, l); - memcpy(getlngstr(ts), str, l * sizeof(char)); - return ts; - } -} - - -/* -** Create or reuse a zero-terminated string, first checking in the -** cache (using the string address as a key). The cache can contain -** only zero-terminated strings, so it is safe to use 'strcmp' to -** check hits. -*/ -TString *luaS_new (lua_State *L, const char *str) { - unsigned int i = point2uint(str) % STRCACHE_N; /* hash */ - int j; - TString **p = G(L)->strcache[i]; - for (j = 0; j < STRCACHE_M; j++) { - if (strcmp(str, getstr(p[j])) == 0) /* hit? */ - return p[j]; /* that is it */ - } - /* normal route */ - for (j = STRCACHE_M - 1; j > 0; j--) - p[j] = p[j - 1]; /* move out last element */ - /* new element is first in the list */ - p[0] = luaS_newlstr(L, str, strlen(str)); - return p[0]; -} - - -Udata *luaS_newudata (lua_State *L, size_t s, unsigned short nuvalue) { - Udata *u; - int i; - GCObject *o; - if (l_unlikely(s > MAX_SIZE - udatamemoffset(nuvalue))) - luaM_toobig(L); - o = luaC_newobj(L, LUA_VUSERDATA, sizeudata(nuvalue, s)); - u = gco2u(o); - u->len = s; - u->nuvalue = nuvalue; - u->metatable = NULL; - for (i = 0; i < nuvalue; i++) - setnilvalue(&u->uv[i].uv); - return u; -} - - -struct NewExt { - ls_byte kind; - const char *s; - size_t len; - TString *ts; /* output */ -}; - - -static void f_newext (lua_State *L, void *ud) { - struct NewExt *ne = cast(struct NewExt *, ud); - size_t size = luaS_sizelngstr(0, ne->kind); - ne->ts = createstrobj(L, size, LUA_VLNGSTR, G(L)->seed); -} - - -TString *luaS_newextlstr (lua_State *L, - const char *s, size_t len, lua_Alloc falloc, void *ud) { - struct NewExt ne; - if (!falloc) { - ne.kind = LSTRFIX; - f_newext(L, &ne); /* just create header */ - } - else { - ne.kind = LSTRMEM; - if (luaD_rawrunprotected(L, f_newext, &ne) != LUA_OK) { /* mem. error? */ - (*falloc)(ud, cast_voidp(s), len + 1, 0); /* free external string */ - luaM_error(L); /* re-raise memory error */ - } - ne.ts->falloc = falloc; - ne.ts->ud = ud; - } - ne.ts->shrlen = ne.kind; - ne.ts->u.lnglen = len; - ne.ts->contents = cast_charp(s); - return ne.ts; -} - - -/* -** Normalize an external string: If it is short, internalize it. -*/ -TString *luaS_normstr (lua_State *L, TString *ts) { - size_t len = ts->u.lnglen; - if (len > LUAI_MAXSHORTLEN) - return ts; /* long string; keep the original */ - else { - const char *str = getlngstr(ts); - return internshrstr(L, str, len); - } -} - diff --git a/lib/lua/lstring.h b/lib/lua/lstring.h deleted file mode 100644 index 1643c3d..0000000 --- a/lib/lua/lstring.h +++ /dev/null @@ -1,73 +0,0 @@ -/* -** $Id: lstring.h $ -** String table (keep all strings handled by Lua) -** See Copyright Notice in lua.h -*/ - -#ifndef lstring_h -#define lstring_h - -#include "lgc.h" -#include "lobject.h" -#include "lstate.h" - - -/* -** Memory-allocation error message must be preallocated (it cannot -** be created after memory is exhausted) -*/ -#define MEMERRMSG "not enough memory" - - -/* -** Maximum length for short strings, that is, strings that are -** internalized. (Cannot be smaller than reserved words or tags for -** metamethods, as these strings must be internalized; -** #("function") = 8, #("__newindex") = 10.) -*/ -#if !defined(LUAI_MAXSHORTLEN) -#define LUAI_MAXSHORTLEN 40 -#endif - - -/* -** Size of a short TString: Size of the header plus space for the string -** itself (including final '\0'). -*/ -#define sizestrshr(l) \ - (offsetof(TString, contents) + ((l) + 1) * sizeof(char)) - - -#define luaS_newliteral(L, s) (luaS_newlstr(L, "" s, \ - (sizeof(s)/sizeof(char))-1)) - - -/* -** test whether a string is a reserved word -*/ -#define isreserved(s) (strisshr(s) && (s)->extra > 0) - - -/* -** equality for short strings, which are always internalized -*/ -#define eqshrstr(a,b) check_exp((a)->tt == LUA_VSHRSTR, (a) == (b)) - - -LUAI_FUNC unsigned luaS_hashlongstr (TString *ts); -LUAI_FUNC int luaS_eqstr (TString *a, TString *b); -LUAI_FUNC void luaS_resize (lua_State *L, int newsize); -LUAI_FUNC void luaS_clearcache (global_State *g); -LUAI_FUNC void luaS_init (lua_State *L); -LUAI_FUNC void luaS_remove (lua_State *L, TString *ts); -LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, - unsigned short nuvalue); -LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l); -LUAI_FUNC TString *luaS_new (lua_State *L, const char *str); -LUAI_FUNC TString *luaS_createlngstrobj (lua_State *L, size_t l); -LUAI_FUNC TString *luaS_newextlstr (lua_State *L, - const char *s, size_t len, lua_Alloc falloc, void *ud); -LUAI_FUNC size_t luaS_sizelngstr (size_t len, int kind); -LUAI_FUNC TString *luaS_normstr (lua_State *L, TString *ts); - -#endif diff --git a/lib/lua/lstrlib.c b/lib/lua/lstrlib.c deleted file mode 100644 index dd3c0fd..0000000 --- a/lib/lua/lstrlib.c +++ /dev/null @@ -1,1900 +0,0 @@ -/* -** $Id: lstrlib.c $ -** Standard library for string operations and pattern-matching -** See Copyright Notice in lua.h -*/ - -#define lstrlib_c -#define LUA_LIB - -#include "lprefix.h" - - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "lua.h" - -#include "lauxlib.h" -#include "lualib.h" -#include "llimits.h" - - -/* -** maximum number of captures that a pattern can do during -** pattern-matching. This limit is arbitrary, but must fit in -** an unsigned char. -*/ -#if !defined(LUA_MAXCAPTURES) -#define LUA_MAXCAPTURES 32 -#endif - - -static int str_len (lua_State *L) { - size_t l; - luaL_checklstring(L, 1, &l); - lua_pushinteger(L, (lua_Integer)l); - return 1; -} - - -/* -** translate a relative initial string position -** (negative means back from end): clip result to [1, inf). -** The length of any string in Lua must fit in a lua_Integer, -** so there are no overflows in the casts. -** The inverted comparison avoids a possible overflow -** computing '-pos'. -*/ -static size_t posrelatI (lua_Integer pos, size_t len) { - if (pos > 0) - return (size_t)pos; - else if (pos == 0) - return 1; - else if (pos < -(lua_Integer)len) /* inverted comparison */ - return 1; /* clip to 1 */ - else return len + (size_t)pos + 1; -} - - -/* -** Gets an optional ending string position from argument 'arg', -** with default value 'def'. -** Negative means back from end: clip result to [0, len] -*/ -static size_t getendpos (lua_State *L, int arg, lua_Integer def, - size_t len) { - lua_Integer pos = luaL_optinteger(L, arg, def); - if (pos > (lua_Integer)len) - return len; - else if (pos >= 0) - return (size_t)pos; - else if (pos < -(lua_Integer)len) - return 0; - else return len + (size_t)pos + 1; -} - - -static int str_sub (lua_State *L) { - size_t l; - const char *s = luaL_checklstring(L, 1, &l); - size_t start = posrelatI(luaL_checkinteger(L, 2), l); - size_t end = getendpos(L, 3, -1, l); - if (start <= end) - lua_pushlstring(L, s + start - 1, (end - start) + 1); - else lua_pushliteral(L, ""); - return 1; -} - - -static int str_reverse (lua_State *L) { - size_t l, i; - luaL_Buffer b; - const char *s = luaL_checklstring(L, 1, &l); - char *p = luaL_buffinitsize(L, &b, l); - for (i = 0; i < l; i++) - p[i] = s[l - i - 1]; - luaL_pushresultsize(&b, l); - return 1; -} - - -static int str_lower (lua_State *L) { - size_t l; - size_t i; - luaL_Buffer b; - const char *s = luaL_checklstring(L, 1, &l); - char *p = luaL_buffinitsize(L, &b, l); - for (i=0; i MAX_SIZE - lsep || - cast_st2S(len + lsep) > cast_st2S(MAX_SIZE) / n)) - return luaL_error(L, "resulting string too large"); - else { - size_t totallen = (cast_sizet(n) * (len + lsep)) - lsep; - luaL_Buffer b; - char *p = luaL_buffinitsize(L, &b, totallen); - while (n-- > 1) { /* first n-1 copies (followed by separator) */ - memcpy(p, s, len * sizeof(char)); p += len; - if (lsep > 0) { /* empty 'memcpy' is not that cheap */ - memcpy(p, sep, lsep * sizeof(char)); p += lsep; - } - } - memcpy(p, s, len * sizeof(char)); /* last copy without separator */ - luaL_pushresultsize(&b, totallen); - } - return 1; -} - - -static int str_byte (lua_State *L) { - size_t l; - const char *s = luaL_checklstring(L, 1, &l); - lua_Integer pi = luaL_optinteger(L, 2, 1); - size_t posi = posrelatI(pi, l); - size_t pose = getendpos(L, 3, pi, l); - int n, i; - if (posi > pose) return 0; /* empty interval; return no values */ - if (l_unlikely(pose - posi >= (size_t)INT_MAX)) /* arithmetic overflow? */ - return luaL_error(L, "string slice too long"); - n = (int)(pose - posi) + 1; - luaL_checkstack(L, n, "string slice too long"); - for (i=0; iinit) { - state->init = 1; - luaL_buffinit(L, &state->B); - } - if (b == NULL) { /* finishing dump? */ - luaL_pushresult(&state->B); /* push result */ - lua_replace(L, 1); /* move it to reserved slot */ - } - else - luaL_addlstring(&state->B, (const char *)b, size); - return 0; -} - - -static int str_dump (lua_State *L) { - struct str_Writer state; - int strip = lua_toboolean(L, 2); - luaL_argcheck(L, lua_type(L, 1) == LUA_TFUNCTION && !lua_iscfunction(L, 1), - 1, "Lua function expected"); - /* ensure function is on the top of the stack and vacate slot 1 */ - lua_pushvalue(L, 1); - state.init = 0; - lua_dump(L, writer, &state, strip); - lua_settop(L, 1); /* leave final result on top */ - return 1; -} - - - -/* -** {====================================================== -** METAMETHODS -** ======================================================= -*/ - -#if defined(LUA_NOCVTS2N) /* { */ - -/* no coercion from strings to numbers */ - -static const luaL_Reg stringmetamethods[] = { - {"__index", NULL}, /* placeholder */ - {NULL, NULL} -}; - -#else /* }{ */ - -static int tonum (lua_State *L, int arg) { - if (lua_type(L, arg) == LUA_TNUMBER) { /* already a number? */ - lua_pushvalue(L, arg); - return 1; - } - else { /* check whether it is a numerical string */ - size_t len; - const char *s = lua_tolstring(L, arg, &len); - return (s != NULL && lua_stringtonumber(L, s) == len + 1); - } -} - - -/* -** To be here, either the first operand was a string or the first -** operand didn't have a corresponding metamethod. (Otherwise, that -** other metamethod would have been called.) So, if this metamethod -** doesn't work, the only other option would be for the second -** operand to have a different metamethod. -*/ -static void trymt (lua_State *L, const char *mtkey, const char *opname) { - lua_settop(L, 2); /* back to the original arguments */ - if (l_unlikely(lua_type(L, 2) == LUA_TSTRING || - !luaL_getmetafield(L, 2, mtkey))) - luaL_error(L, "attempt to %s a '%s' with a '%s'", opname, - luaL_typename(L, -2), luaL_typename(L, -1)); - lua_insert(L, -3); /* put metamethod before arguments */ - lua_call(L, 2, 1); /* call metamethod */ -} - - -static int arith (lua_State *L, int op, const char *mtname) { - if (tonum(L, 1) && tonum(L, 2)) - lua_arith(L, op); /* result will be on the top */ - else - trymt(L, mtname, mtname + 2); - return 1; -} - - -static int arith_add (lua_State *L) { - return arith(L, LUA_OPADD, "__add"); -} - -static int arith_sub (lua_State *L) { - return arith(L, LUA_OPSUB, "__sub"); -} - -static int arith_mul (lua_State *L) { - return arith(L, LUA_OPMUL, "__mul"); -} - -static int arith_mod (lua_State *L) { - return arith(L, LUA_OPMOD, "__mod"); -} - -static int arith_pow (lua_State *L) { - return arith(L, LUA_OPPOW, "__pow"); -} - -static int arith_div (lua_State *L) { - return arith(L, LUA_OPDIV, "__div"); -} - -static int arith_idiv (lua_State *L) { - return arith(L, LUA_OPIDIV, "__idiv"); -} - -static int arith_unm (lua_State *L) { - return arith(L, LUA_OPUNM, "__unm"); -} - - -static const luaL_Reg stringmetamethods[] = { - {"__add", arith_add}, - {"__sub", arith_sub}, - {"__mul", arith_mul}, - {"__mod", arith_mod}, - {"__pow", arith_pow}, - {"__div", arith_div}, - {"__idiv", arith_idiv}, - {"__unm", arith_unm}, - {"__index", NULL}, /* placeholder */ - {NULL, NULL} -}; - -#endif /* } */ - -/* }====================================================== */ - -/* -** {====================================================== -** PATTERN MATCHING -** ======================================================= -*/ - - -#define CAP_UNFINISHED (-1) -#define CAP_POSITION (-2) - - -typedef struct MatchState { - const char *src_init; /* init of source string */ - const char *src_end; /* end ('\0') of source string */ - const char *p_end; /* end ('\0') of pattern */ - lua_State *L; - int matchdepth; /* control for recursive depth (to avoid C stack overflow) */ - int level; /* total number of captures (finished or unfinished) */ - struct { - const char *init; - ptrdiff_t len; /* length or special value (CAP_*) */ - } capture[LUA_MAXCAPTURES]; -} MatchState; - - -/* recursive function */ -static const char *match (MatchState *ms, const char *s, const char *p); - - -/* maximum recursion depth for 'match' */ -#if !defined(MAXCCALLS) -#define MAXCCALLS 200 -#endif - - -#define L_ESC '%' -#define SPECIALS "^$*+?.([%-" - - -static int check_capture (MatchState *ms, int l) { - l -= '1'; - if (l_unlikely(l < 0 || l >= ms->level || - ms->capture[l].len == CAP_UNFINISHED)) - return luaL_error(ms->L, "invalid capture index %%%d", l + 1); - return l; -} - - -static int capture_to_close (MatchState *ms) { - int level = ms->level; - for (level--; level>=0; level--) - if (ms->capture[level].len == CAP_UNFINISHED) return level; - return luaL_error(ms->L, "invalid pattern capture"); -} - - -static const char *classend (MatchState *ms, const char *p) { - switch (*p++) { - case L_ESC: { - if (l_unlikely(p == ms->p_end)) - luaL_error(ms->L, "malformed pattern (ends with '%%')"); - return p+1; - } - case '[': { - if (*p == '^') p++; - do { /* look for a ']' */ - if (l_unlikely(p == ms->p_end)) - luaL_error(ms->L, "malformed pattern (missing ']')"); - if (*(p++) == L_ESC && p < ms->p_end) - p++; /* skip escapes (e.g. '%]') */ - } while (*p != ']'); - return p+1; - } - default: { - return p; - } - } -} - - -static int match_class (int c, int cl) { - int res; - switch (tolower(cl)) { - case 'a' : res = isalpha(c); break; - case 'c' : res = iscntrl(c); break; - case 'd' : res = isdigit(c); break; - case 'g' : res = isgraph(c); break; - case 'l' : res = islower(c); break; - case 'p' : res = ispunct(c); break; - case 's' : res = isspace(c); break; - case 'u' : res = isupper(c); break; - case 'w' : res = isalnum(c); break; - case 'x' : res = isxdigit(c); break; - case 'z' : res = (c == 0); break; /* deprecated option */ - default: return (cl == c); - } - return (islower(cl) ? res : !res); -} - - -static int matchbracketclass (int c, const char *p, const char *ec) { - int sig = 1; - if (*(p+1) == '^') { - sig = 0; - p++; /* skip the '^' */ - } - while (++p < ec) { - if (*p == L_ESC) { - p++; - if (match_class(c, cast_uchar(*p))) - return sig; - } - else if ((*(p+1) == '-') && (p+2 < ec)) { - p+=2; - if (cast_uchar(*(p-2)) <= c && c <= cast_uchar(*p)) - return sig; - } - else if (cast_uchar(*p) == c) return sig; - } - return !sig; -} - - -static int singlematch (MatchState *ms, const char *s, const char *p, - const char *ep) { - if (s >= ms->src_end) - return 0; - else { - int c = cast_uchar(*s); - switch (*p) { - case '.': return 1; /* matches any char */ - case L_ESC: return match_class(c, cast_uchar(*(p+1))); - case '[': return matchbracketclass(c, p, ep-1); - default: return (cast_uchar(*p) == c); - } - } -} - - -static const char *matchbalance (MatchState *ms, const char *s, - const char *p) { - if (l_unlikely(p >= ms->p_end - 1)) - luaL_error(ms->L, "malformed pattern (missing arguments to '%%b')"); - if (*s != *p) return NULL; - else { - int b = *p; - int e = *(p+1); - int cont = 1; - while (++s < ms->src_end) { - if (*s == e) { - if (--cont == 0) return s+1; - } - else if (*s == b) cont++; - } - } - return NULL; /* string ends out of balance */ -} - - -static const char *max_expand (MatchState *ms, const char *s, - const char *p, const char *ep) { - ptrdiff_t i = 0; /* counts maximum expand for item */ - while (singlematch(ms, s + i, p, ep)) - i++; - /* keeps trying to match with the maximum repetitions */ - while (i>=0) { - const char *res = match(ms, (s+i), ep+1); - if (res) return res; - i--; /* else didn't match; reduce 1 repetition to try again */ - } - return NULL; -} - - -static const char *min_expand (MatchState *ms, const char *s, - const char *p, const char *ep) { - for (;;) { - const char *res = match(ms, s, ep+1); - if (res != NULL) - return res; - else if (singlematch(ms, s, p, ep)) - s++; /* try with one more repetition */ - else return NULL; - } -} - - -static const char *start_capture (MatchState *ms, const char *s, - const char *p, int what) { - const char *res; - int level = ms->level; - if (level >= LUA_MAXCAPTURES) luaL_error(ms->L, "too many captures"); - ms->capture[level].init = s; - ms->capture[level].len = what; - ms->level = level+1; - if ((res=match(ms, s, p)) == NULL) /* match failed? */ - ms->level--; /* undo capture */ - return res; -} - - -static const char *end_capture (MatchState *ms, const char *s, - const char *p) { - int l = capture_to_close(ms); - const char *res; - ms->capture[l].len = s - ms->capture[l].init; /* close capture */ - if ((res = match(ms, s, p)) == NULL) /* match failed? */ - ms->capture[l].len = CAP_UNFINISHED; /* undo capture */ - return res; -} - - -static const char *match_capture (MatchState *ms, const char *s, int l) { - size_t len; - l = check_capture(ms, l); - len = cast_sizet(ms->capture[l].len); - if ((size_t)(ms->src_end-s) >= len && - memcmp(ms->capture[l].init, s, len) == 0) - return s+len; - else return NULL; -} - - -static const char *match (MatchState *ms, const char *s, const char *p) { - if (l_unlikely(ms->matchdepth-- == 0)) - luaL_error(ms->L, "pattern too complex"); - init: /* using goto to optimize tail recursion */ - if (p != ms->p_end) { /* end of pattern? */ - switch (*p) { - case '(': { /* start capture */ - if (*(p + 1) == ')') /* position capture? */ - s = start_capture(ms, s, p + 2, CAP_POSITION); - else - s = start_capture(ms, s, p + 1, CAP_UNFINISHED); - break; - } - case ')': { /* end capture */ - s = end_capture(ms, s, p + 1); - break; - } - case '$': { - if ((p + 1) != ms->p_end) /* is the '$' the last char in pattern? */ - goto dflt; /* no; go to default */ - s = (s == ms->src_end) ? s : NULL; /* check end of string */ - break; - } - case L_ESC: { /* escaped sequences not in the format class[*+?-]? */ - switch (*(p + 1)) { - case 'b': { /* balanced string? */ - s = matchbalance(ms, s, p + 2); - if (s != NULL) { - p += 4; goto init; /* return match(ms, s, p + 4); */ - } /* else fail (s == NULL) */ - break; - } - case 'f': { /* frontier? */ - const char *ep; char previous; - p += 2; - if (l_unlikely(*p != '[')) - luaL_error(ms->L, "missing '[' after '%%f' in pattern"); - ep = classend(ms, p); /* points to what is next */ - previous = (s == ms->src_init) ? '\0' : *(s - 1); - if (!matchbracketclass(cast_uchar(previous), p, ep - 1) && - matchbracketclass(cast_uchar(*s), p, ep - 1)) { - p = ep; goto init; /* return match(ms, s, ep); */ - } - s = NULL; /* match failed */ - break; - } - case '0': case '1': case '2': case '3': - case '4': case '5': case '6': case '7': - case '8': case '9': { /* capture results (%0-%9)? */ - s = match_capture(ms, s, cast_uchar(*(p + 1))); - if (s != NULL) { - p += 2; goto init; /* return match(ms, s, p + 2) */ - } - break; - } - default: goto dflt; - } - break; - } - default: dflt: { /* pattern class plus optional suffix */ - const char *ep = classend(ms, p); /* points to optional suffix */ - /* does not match at least once? */ - if (!singlematch(ms, s, p, ep)) { - if (*ep == '*' || *ep == '?' || *ep == '-') { /* accept empty? */ - p = ep + 1; goto init; /* return match(ms, s, ep + 1); */ - } - else /* '+' or no suffix */ - s = NULL; /* fail */ - } - else { /* matched once */ - switch (*ep) { /* handle optional suffix */ - case '?': { /* optional */ - const char *res; - if ((res = match(ms, s + 1, ep + 1)) != NULL) - s = res; - else { - p = ep + 1; goto init; /* else return match(ms, s, ep + 1); */ - } - break; - } - case '+': /* 1 or more repetitions */ - s++; /* 1 match already done */ - /* FALLTHROUGH */ - case '*': /* 0 or more repetitions */ - s = max_expand(ms, s, p, ep); - break; - case '-': /* 0 or more repetitions (minimum) */ - s = min_expand(ms, s, p, ep); - break; - default: /* no suffix */ - s++; p = ep; goto init; /* return match(ms, s + 1, ep); */ - } - } - break; - } - } - } - ms->matchdepth++; - return s; -} - - - -static const char *lmemfind (const char *s1, size_t l1, - const char *s2, size_t l2) { - if (l2 == 0) return s1; /* empty strings are everywhere */ - else if (l2 > l1) return NULL; /* avoids a negative 'l1' */ - else { - const char *init; /* to search for a '*s2' inside 's1' */ - l2--; /* 1st char will be checked by 'memchr' */ - l1 = l1-l2; /* 's2' cannot be found after that */ - while (l1 > 0 && (init = (const char *)memchr(s1, *s2, l1)) != NULL) { - init++; /* 1st char is already checked */ - if (memcmp(init, s2+1, l2) == 0) - return init-1; - else { /* correct 'l1' and 's1' to try again */ - l1 -= ct_diff2sz(init - s1); - s1 = init; - } - } - return NULL; /* not found */ - } -} - - -/* -** get information about the i-th capture. If there are no captures -** and 'i==0', return information about the whole match, which -** is the range 's'..'e'. If the capture is a string, return -** its length and put its address in '*cap'. If it is an integer -** (a position), push it on the stack and return CAP_POSITION. -*/ -static ptrdiff_t get_onecapture (MatchState *ms, int i, const char *s, - const char *e, const char **cap) { - if (i >= ms->level) { - if (l_unlikely(i != 0)) - luaL_error(ms->L, "invalid capture index %%%d", i + 1); - *cap = s; - return (e - s); - } - else { - ptrdiff_t capl = ms->capture[i].len; - *cap = ms->capture[i].init; - if (l_unlikely(capl == CAP_UNFINISHED)) - luaL_error(ms->L, "unfinished capture"); - else if (capl == CAP_POSITION) - lua_pushinteger(ms->L, - ct_diff2S(ms->capture[i].init - ms->src_init) + 1); - return capl; - } -} - - -/* -** Push the i-th capture on the stack. -*/ -static void push_onecapture (MatchState *ms, int i, const char *s, - const char *e) { - const char *cap; - ptrdiff_t l = get_onecapture(ms, i, s, e, &cap); - if (l != CAP_POSITION) - lua_pushlstring(ms->L, cap, cast_sizet(l)); - /* else position was already pushed */ -} - - -static int push_captures (MatchState *ms, const char *s, const char *e) { - int i; - int nlevels = (ms->level == 0 && s) ? 1 : ms->level; - luaL_checkstack(ms->L, nlevels, "too many captures"); - for (i = 0; i < nlevels; i++) - push_onecapture(ms, i, s, e); - return nlevels; /* number of strings pushed */ -} - - -/* check whether pattern has no special characters */ -static int nospecials (const char *p, size_t l) { - size_t upto = 0; - do { - if (strpbrk(p + upto, SPECIALS)) - return 0; /* pattern has a special character */ - upto += strlen(p + upto) + 1; /* may have more after \0 */ - } while (upto <= l); - return 1; /* no special chars found */ -} - - -/* -** Prepare state for matches. These fields are not affected by each match. -*/ -static void prepstate (MatchState *ms, lua_State *L, - const char *s, size_t ls, const char *p, size_t lp) { - ms->L = L; - ms->src_init = s; - ms->src_end = s + ls; - ms->p_end = p + lp; -} - - -/* -** (Re)prepare state for a match, setting fields that change during -** each match. -*/ -static void reprepstate (MatchState *ms) { - ms->matchdepth = MAXCCALLS; - ms->level = 0; -} - - -static int str_find_aux (lua_State *L, int find) { - size_t ls, lp; - const char *s = luaL_checklstring(L, 1, &ls); - const char *p = luaL_checklstring(L, 2, &lp); - size_t init = posrelatI(luaL_optinteger(L, 3, 1), ls) - 1; - if (init > ls) { /* start after string's end? */ - luaL_pushfail(L); /* cannot find anything */ - return 1; - } - /* explicit request or no special characters? */ - if (find && (lua_toboolean(L, 4) || nospecials(p, lp))) { - /* do a plain search */ - const char *s2 = lmemfind(s + init, ls - init, p, lp); - if (s2) { - lua_pushinteger(L, ct_diff2S(s2 - s) + 1); - lua_pushinteger(L, cast_st2S(ct_diff2sz(s2 - s) + lp)); - return 2; - } - } - else { - MatchState ms; - const char *s1 = s + init; - int anchor = (*p == '^'); - if (anchor) { - p++; lp--; /* skip anchor character */ - } - prepstate(&ms, L, s, ls, p, lp); - do { - const char *res; - reprepstate(&ms); - if ((res=match(&ms, s1, p)) != NULL) { - if (find) { - lua_pushinteger(L, ct_diff2S(s1 - s) + 1); /* start */ - lua_pushinteger(L, ct_diff2S(res - s)); /* end */ - return push_captures(&ms, NULL, 0) + 2; - } - else - return push_captures(&ms, s1, res); - } - } while (s1++ < ms.src_end && !anchor); - } - luaL_pushfail(L); /* not found */ - return 1; -} - - -static int str_find (lua_State *L) { - return str_find_aux(L, 1); -} - - -static int str_match (lua_State *L) { - return str_find_aux(L, 0); -} - - -/* state for 'gmatch' */ -typedef struct GMatchState { - const char *src; /* current position */ - const char *p; /* pattern */ - const char *lastmatch; /* end of last match */ - MatchState ms; /* match state */ -} GMatchState; - - -static int gmatch_aux (lua_State *L) { - GMatchState *gm = (GMatchState *)lua_touserdata(L, lua_upvalueindex(3)); - const char *src; - gm->ms.L = L; - for (src = gm->src; src <= gm->ms.src_end; src++) { - const char *e; - reprepstate(&gm->ms); - if ((e = match(&gm->ms, src, gm->p)) != NULL && e != gm->lastmatch) { - gm->src = gm->lastmatch = e; - return push_captures(&gm->ms, src, e); - } - } - return 0; /* not found */ -} - - -static int gmatch (lua_State *L) { - size_t ls, lp; - const char *s = luaL_checklstring(L, 1, &ls); - const char *p = luaL_checklstring(L, 2, &lp); - size_t init = posrelatI(luaL_optinteger(L, 3, 1), ls) - 1; - GMatchState *gm; - lua_settop(L, 2); /* keep strings on closure to avoid being collected */ - gm = (GMatchState *)lua_newuserdatauv(L, sizeof(GMatchState), 0); - if (init > ls) /* start after string's end? */ - init = ls + 1; /* avoid overflows in 's + init' */ - prepstate(&gm->ms, L, s, ls, p, lp); - gm->src = s + init; gm->p = p; gm->lastmatch = NULL; - lua_pushcclosure(L, gmatch_aux, 3); - return 1; -} - - -static void add_s (MatchState *ms, luaL_Buffer *b, const char *s, - const char *e) { - size_t l; - lua_State *L = ms->L; - const char *news = lua_tolstring(L, 3, &l); - const char *p; - while ((p = (char *)memchr(news, L_ESC, l)) != NULL) { - luaL_addlstring(b, news, ct_diff2sz(p - news)); - p++; /* skip ESC */ - if (*p == L_ESC) /* '%%' */ - luaL_addchar(b, *p); - else if (*p == '0') /* '%0' */ - luaL_addlstring(b, s, ct_diff2sz(e - s)); - else if (isdigit(cast_uchar(*p))) { /* '%n' */ - const char *cap; - ptrdiff_t resl = get_onecapture(ms, *p - '1', s, e, &cap); - if (resl == CAP_POSITION) - luaL_addvalue(b); /* add position to accumulated result */ - else - luaL_addlstring(b, cap, cast_sizet(resl)); - } - else - luaL_error(L, "invalid use of '%c' in replacement string", L_ESC); - l -= ct_diff2sz(p + 1 - news); - news = p + 1; - } - luaL_addlstring(b, news, l); -} - - -/* -** Add the replacement value to the string buffer 'b'. -** Return true if the original string was changed. (Function calls and -** table indexing resulting in nil or false do not change the subject.) -*/ -static int add_value (MatchState *ms, luaL_Buffer *b, const char *s, - const char *e, int tr) { - lua_State *L = ms->L; - switch (tr) { - case LUA_TFUNCTION: { /* call the function */ - int n; - lua_pushvalue(L, 3); /* push the function */ - n = push_captures(ms, s, e); /* all captures as arguments */ - lua_call(L, n, 1); /* call it */ - break; - } - case LUA_TTABLE: { /* index the table */ - push_onecapture(ms, 0, s, e); /* first capture is the index */ - lua_gettable(L, 3); - break; - } - default: { /* LUA_TNUMBER or LUA_TSTRING */ - add_s(ms, b, s, e); /* add value to the buffer */ - return 1; /* something changed */ - } - } - if (!lua_toboolean(L, -1)) { /* nil or false? */ - lua_pop(L, 1); /* remove value */ - luaL_addlstring(b, s, ct_diff2sz(e - s)); /* keep original text */ - return 0; /* no changes */ - } - else if (l_unlikely(!lua_isstring(L, -1))) - return luaL_error(L, "invalid replacement value (a %s)", - luaL_typename(L, -1)); - else { - luaL_addvalue(b); /* add result to accumulator */ - return 1; /* something changed */ - } -} - - -static int str_gsub (lua_State *L) { - size_t srcl, lp; - const char *src = luaL_checklstring(L, 1, &srcl); /* subject */ - const char *p = luaL_checklstring(L, 2, &lp); /* pattern */ - const char *lastmatch = NULL; /* end of last match */ - int tr = lua_type(L, 3); /* replacement type */ - /* max replacements */ - lua_Integer max_s = luaL_optinteger(L, 4, cast_st2S(srcl) + 1); - int anchor = (*p == '^'); - lua_Integer n = 0; /* replacement count */ - int changed = 0; /* change flag */ - MatchState ms; - luaL_Buffer b; - luaL_argexpected(L, tr == LUA_TNUMBER || tr == LUA_TSTRING || - tr == LUA_TFUNCTION || tr == LUA_TTABLE, 3, - "string/function/table"); - luaL_buffinit(L, &b); - if (anchor) { - p++; lp--; /* skip anchor character */ - } - prepstate(&ms, L, src, srcl, p, lp); - while (n < max_s) { - const char *e; - reprepstate(&ms); /* (re)prepare state for new match */ - if ((e = match(&ms, src, p)) != NULL && e != lastmatch) { /* match? */ - n++; - changed = add_value(&ms, &b, src, e, tr) || changed; - src = lastmatch = e; - } - else if (src < ms.src_end) /* otherwise, skip one character */ - luaL_addchar(&b, *src++); - else break; /* end of subject */ - if (anchor) break; - } - if (!changed) /* no changes? */ - lua_pushvalue(L, 1); /* return original string */ - else { /* something changed */ - luaL_addlstring(&b, src, ct_diff2sz(ms.src_end - src)); - luaL_pushresult(&b); /* create and return new string */ - } - lua_pushinteger(L, n); /* number of substitutions */ - return 2; -} - -/* }====================================================== */ - - - -/* -** {====================================================== -** STRING FORMAT -** ======================================================= -*/ - -#if !defined(lua_number2strx) /* { */ - -/* -** Hexadecimal floating-point formatter -*/ - -#define SIZELENMOD (sizeof(LUA_NUMBER_FRMLEN)/sizeof(char)) - - -/* -** Number of bits that goes into the first digit. It can be any value -** between 1 and 4; the following definition tries to align the number -** to nibble boundaries by making what is left after that first digit a -** multiple of 4. -*/ -#define L_NBFD ((l_floatatt(MANT_DIG) - 1)%4 + 1) - - -/* -** Add integer part of 'x' to buffer and return new 'x' -*/ -static lua_Number adddigit (char *buff, unsigned n, lua_Number x) { - lua_Number dd = l_mathop(floor)(x); /* get integer part from 'x' */ - int d = (int)dd; - buff[n] = cast_char(d < 10 ? d + '0' : d - 10 + 'a'); /* add to buffer */ - return x - dd; /* return what is left */ -} - - -static int num2straux (char *buff, unsigned sz, lua_Number x) { - /* if 'inf' or 'NaN', format it like '%g' */ - if (x != x || x == (lua_Number)HUGE_VAL || x == -(lua_Number)HUGE_VAL) - return l_sprintf(buff, sz, LUA_NUMBER_FMT, (LUAI_UACNUMBER)x); - else if (x == 0) { /* can be -0... */ - /* create "0" or "-0" followed by exponent */ - return l_sprintf(buff, sz, LUA_NUMBER_FMT "x0p+0", (LUAI_UACNUMBER)x); - } - else { - int e; - lua_Number m = l_mathop(frexp)(x, &e); /* 'x' fraction and exponent */ - unsigned n = 0; /* character count */ - if (m < 0) { /* is number negative? */ - buff[n++] = '-'; /* add sign */ - m = -m; /* make it positive */ - } - buff[n++] = '0'; buff[n++] = 'x'; /* add "0x" */ - m = adddigit(buff, n++, m * (1 << L_NBFD)); /* add first digit */ - e -= L_NBFD; /* this digit goes before the radix point */ - if (m > 0) { /* more digits? */ - buff[n++] = lua_getlocaledecpoint(); /* add radix point */ - do { /* add as many digits as needed */ - m = adddigit(buff, n++, m * 16); - } while (m > 0); - } - n += cast_uint(l_sprintf(buff + n, sz - n, "p%+d", e)); /* add exponent */ - lua_assert(n < sz); - return cast_int(n); - } -} - - -static int lua_number2strx (lua_State *L, char *buff, unsigned sz, - const char *fmt, lua_Number x) { - int n = num2straux(buff, sz, x); - if (fmt[SIZELENMOD] == 'A') { - int i; - for (i = 0; i < n; i++) - buff[i] = cast_char(toupper(cast_uchar(buff[i]))); - } - else if (l_unlikely(fmt[SIZELENMOD] != 'a')) - return luaL_error(L, "modifiers for format '%%a'/'%%A' not implemented"); - return n; -} - -#endif /* } */ - - -/* -** Maximum size for items formatted with '%f'. This size is produced -** by format('%.99f', -maxfloat), and is equal to 99 + 3 ('-', '.', -** and '\0') + number of decimal digits to represent maxfloat (which -** is maximum exponent + 1). (99+3+1, adding some extra, 110) -*/ -#define MAX_ITEMF (110 + l_floatatt(MAX_10_EXP)) - - -/* -** All formats except '%f' do not need that large limit. The other -** float formats use exponents, so that they fit in the 99 limit for -** significant digits; 's' for large strings and 'q' add items directly -** to the buffer; all integer formats also fit in the 99 limit. The -** worst case are floats: they may need 99 significant digits, plus -** '0x', '-', '.', 'e+XXXX', and '\0'. Adding some extra, 120. -*/ -#define MAX_ITEM 120 - - -/* valid flags in a format specification */ -#if !defined(L_FMTFLAGSF) - -/* valid flags for a, A, e, E, f, F, g, and G conversions */ -#define L_FMTFLAGSF "-+#0 " - -/* valid flags for o, x, and X conversions */ -#define L_FMTFLAGSX "-#0" - -/* valid flags for d and i conversions */ -#define L_FMTFLAGSI "-+0 " - -/* valid flags for u conversions */ -#define L_FMTFLAGSU "-0" - -/* valid flags for c, p, and s conversions */ -#define L_FMTFLAGSC "-" - -#endif - - -/* -** Maximum size of each format specification (such as "%-099.99d"): -** Initial '%', flags (up to 5), width (2), period, precision (2), -** length modifier (8), conversion specifier, and final '\0', plus some -** extra. -*/ -#define MAX_FORMAT 32 - - -static void addquoted (luaL_Buffer *b, const char *s, size_t len) { - luaL_addchar(b, '"'); - while (len--) { - if (*s == '"' || *s == '\\' || *s == '\n') { - luaL_addchar(b, '\\'); - luaL_addchar(b, *s); - } - else if (iscntrl(cast_uchar(*s))) { - char buff[10]; - if (!isdigit(cast_uchar(*(s+1)))) - l_sprintf(buff, sizeof(buff), "\\%d", (int)cast_uchar(*s)); - else - l_sprintf(buff, sizeof(buff), "\\%03d", (int)cast_uchar(*s)); - luaL_addstring(b, buff); - } - else - luaL_addchar(b, *s); - s++; - } - luaL_addchar(b, '"'); -} - - -/* -** Serialize a floating-point number in such a way that it can be -** scanned back by Lua. Use hexadecimal format for "common" numbers -** (to preserve precision); inf, -inf, and NaN are handled separately. -** (NaN cannot be expressed as a numeral, so we write '(0/0)' for it.) -*/ -static int quotefloat (lua_State *L, char *buff, lua_Number n) { - const char *s; /* for the fixed representations */ - if (n == (lua_Number)HUGE_VAL) /* inf? */ - s = "1e9999"; - else if (n == -(lua_Number)HUGE_VAL) /* -inf? */ - s = "-1e9999"; - else if (n != n) /* NaN? */ - s = "(0/0)"; - else { /* format number as hexadecimal */ - int nb = lua_number2strx(L, buff, MAX_ITEM, - "%" LUA_NUMBER_FRMLEN "a", n); - /* ensures that 'buff' string uses a dot as the radix character */ - if (memchr(buff, '.', cast_uint(nb)) == NULL) { /* no dot? */ - char point = lua_getlocaledecpoint(); /* try locale point */ - char *ppoint = (char *)memchr(buff, point, cast_uint(nb)); - if (ppoint) *ppoint = '.'; /* change it to a dot */ - } - return nb; - } - /* for the fixed representations */ - return l_sprintf(buff, MAX_ITEM, "%s", s); -} - - -static void addliteral (lua_State *L, luaL_Buffer *b, int arg) { - switch (lua_type(L, arg)) { - case LUA_TSTRING: { - size_t len; - const char *s = lua_tolstring(L, arg, &len); - addquoted(b, s, len); - break; - } - case LUA_TNUMBER: { - char *buff = luaL_prepbuffsize(b, MAX_ITEM); - int nb; - if (!lua_isinteger(L, arg)) /* float? */ - nb = quotefloat(L, buff, lua_tonumber(L, arg)); - else { /* integers */ - lua_Integer n = lua_tointeger(L, arg); - const char *format = (n == LUA_MININTEGER) /* corner case? */ - ? "0x%" LUA_INTEGER_FRMLEN "x" /* use hex */ - : LUA_INTEGER_FMT; /* else use default format */ - nb = l_sprintf(buff, MAX_ITEM, format, (LUAI_UACINT)n); - } - luaL_addsize(b, cast_uint(nb)); - break; - } - case LUA_TNIL: case LUA_TBOOLEAN: { - luaL_tolstring(L, arg, NULL); - luaL_addvalue(b); - break; - } - default: { - luaL_argerror(L, arg, "value has no literal form"); - } - } -} - - -static const char *get2digits (const char *s) { - if (isdigit(cast_uchar(*s))) { - s++; - if (isdigit(cast_uchar(*s))) s++; /* (2 digits at most) */ - } - return s; -} - - -/* -** Check whether a conversion specification is valid. When called, -** first character in 'form' must be '%' and last character must -** be a valid conversion specifier. 'flags' are the accepted flags; -** 'precision' signals whether to accept a precision. -*/ -static void checkformat (lua_State *L, const char *form, const char *flags, - int precision) { - const char *spec = form + 1; /* skip '%' */ - spec += strspn(spec, flags); /* skip flags */ - if (*spec != '0') { /* a width cannot start with '0' */ - spec = get2digits(spec); /* skip width */ - if (*spec == '.' && precision) { - spec++; - spec = get2digits(spec); /* skip precision */ - } - } - if (!isalpha(cast_uchar(*spec))) /* did not go to the end? */ - luaL_error(L, "invalid conversion specification: '%s'", form); -} - - -/* -** Get a conversion specification and copy it to 'form'. -** Return the address of its last character. -*/ -static const char *getformat (lua_State *L, const char *strfrmt, - char *form) { - /* spans flags, width, and precision ('0' is included as a flag) */ - size_t len = strspn(strfrmt, L_FMTFLAGSF "123456789."); - len++; /* adds following character (should be the specifier) */ - /* still needs space for '%', '\0', plus a length modifier */ - if (len >= MAX_FORMAT - 10) - luaL_error(L, "invalid format (too long)"); - *(form++) = '%'; - memcpy(form, strfrmt, len * sizeof(char)); - *(form + len) = '\0'; - return strfrmt + len - 1; -} - - -/* -** add length modifier into formats -*/ -static void addlenmod (char *form, const char *lenmod) { - size_t l = strlen(form); - size_t lm = strlen(lenmod); - char spec = form[l - 1]; - strcpy(form + l - 1, lenmod); - form[l + lm - 1] = spec; - form[l + lm] = '\0'; -} - - -static int str_format (lua_State *L) { - int top = lua_gettop(L); - int arg = 1; - size_t sfl; - const char *strfrmt = luaL_checklstring(L, arg, &sfl); - const char *strfrmt_end = strfrmt+sfl; - const char *flags; - luaL_Buffer b; - luaL_buffinit(L, &b); - while (strfrmt < strfrmt_end) { - if (*strfrmt != L_ESC) - luaL_addchar(&b, *strfrmt++); - else if (*++strfrmt == L_ESC) - luaL_addchar(&b, *strfrmt++); /* %% */ - else { /* format item */ - char form[MAX_FORMAT]; /* to store the format ('%...') */ - unsigned maxitem = MAX_ITEM; /* maximum length for the result */ - char *buff = luaL_prepbuffsize(&b, maxitem); /* to put result */ - int nb = 0; /* number of bytes in result */ - if (++arg > top) - return luaL_argerror(L, arg, "no value"); - strfrmt = getformat(L, strfrmt, form); - switch (*strfrmt++) { - case 'c': { - checkformat(L, form, L_FMTFLAGSC, 0); - nb = l_sprintf(buff, maxitem, form, (int)luaL_checkinteger(L, arg)); - break; - } - case 'd': case 'i': - flags = L_FMTFLAGSI; - goto intcase; - case 'u': - flags = L_FMTFLAGSU; - goto intcase; - case 'o': case 'x': case 'X': - flags = L_FMTFLAGSX; - intcase: { - lua_Integer n = luaL_checkinteger(L, arg); - checkformat(L, form, flags, 1); - addlenmod(form, LUA_INTEGER_FRMLEN); - nb = l_sprintf(buff, maxitem, form, (LUAI_UACINT)n); - break; - } - case 'a': case 'A': - checkformat(L, form, L_FMTFLAGSF, 1); - addlenmod(form, LUA_NUMBER_FRMLEN); - nb = lua_number2strx(L, buff, maxitem, form, - luaL_checknumber(L, arg)); - break; - case 'f': - maxitem = MAX_ITEMF; /* extra space for '%f' */ - buff = luaL_prepbuffsize(&b, maxitem); - /* FALLTHROUGH */ - case 'e': case 'E': case 'g': case 'G': { - lua_Number n = luaL_checknumber(L, arg); - checkformat(L, form, L_FMTFLAGSF, 1); - addlenmod(form, LUA_NUMBER_FRMLEN); - nb = l_sprintf(buff, maxitem, form, (LUAI_UACNUMBER)n); - break; - } - case 'p': { - const void *p = lua_topointer(L, arg); - checkformat(L, form, L_FMTFLAGSC, 0); - if (p == NULL) { /* avoid calling 'printf' with argument NULL */ - p = "(null)"; /* result */ - form[strlen(form) - 1] = 's'; /* format it as a string */ - } - nb = l_sprintf(buff, maxitem, form, p); - break; - } - case 'q': { - if (form[2] != '\0') /* modifiers? */ - return luaL_error(L, "specifier '%%q' cannot have modifiers"); - addliteral(L, &b, arg); - break; - } - case 's': { - size_t l; - const char *s = luaL_tolstring(L, arg, &l); - if (form[2] == '\0') /* no modifiers? */ - luaL_addvalue(&b); /* keep entire string */ - else { - luaL_argcheck(L, l == strlen(s), arg, "string contains zeros"); - checkformat(L, form, L_FMTFLAGSC, 1); - if (strchr(form, '.') == NULL && l >= 100) { - /* no precision and string is too long to be formatted */ - luaL_addvalue(&b); /* keep entire string */ - } - else { /* format the string into 'buff' */ - nb = l_sprintf(buff, maxitem, form, s); - lua_pop(L, 1); /* remove result from 'luaL_tolstring' */ - } - } - break; - } - default: { /* also treat cases 'pnLlh' */ - return luaL_error(L, "invalid conversion '%s' to 'format'", form); - } - } - lua_assert(cast_uint(nb) < maxitem); - luaL_addsize(&b, cast_uint(nb)); - } - } - luaL_pushresult(&b); - return 1; -} - -/* }====================================================== */ - - -/* -** {====================================================== -** PACK/UNPACK -** ======================================================= -*/ - - -/* value used for padding */ -#if !defined(LUAL_PACKPADBYTE) -#define LUAL_PACKPADBYTE 0x00 -#endif - -/* maximum size for the binary representation of an integer */ -#define MAXINTSIZE 16 - -/* number of bits in a character */ -#define NB CHAR_BIT - -/* mask for one character (NB 1's) */ -#define MC ((1 << NB) - 1) - -/* size of a lua_Integer */ -#define SZINT ((int)sizeof(lua_Integer)) - - -/* dummy union to get native endianness */ -static const union { - int dummy; - char little; /* true iff machine is little endian */ -} nativeendian = {1}; - - -/* -** information to pack/unpack stuff -*/ -typedef struct Header { - lua_State *L; - int islittle; - unsigned maxalign; -} Header; - - -/* -** options for pack/unpack -*/ -typedef enum KOption { - Kint, /* signed integers */ - Kuint, /* unsigned integers */ - Kfloat, /* single-precision floating-point numbers */ - Knumber, /* Lua "native" floating-point numbers */ - Kdouble, /* double-precision floating-point numbers */ - Kchar, /* fixed-length strings */ - Kstring, /* strings with prefixed length */ - Kzstr, /* zero-terminated strings */ - Kpadding, /* padding */ - Kpaddalign, /* padding for alignment */ - Knop /* no-op (configuration or spaces) */ -} KOption; - - -/* -** Read an integer numeral from string 'fmt' or return 'df' if -** there is no numeral -*/ -static int digit (int c) { return '0' <= c && c <= '9'; } - -static size_t getnum (const char **fmt, size_t df) { - if (!digit(**fmt)) /* no number? */ - return df; /* return default value */ - else { - size_t a = 0; - do { - a = a*10 + cast_uint(*((*fmt)++) - '0'); - } while (digit(**fmt) && a <= (MAX_SIZE - 9)/10); - return a; - } -} - - -/* -** Read an integer numeral and raises an error if it is larger -** than the maximum size of integers. -*/ -static unsigned getnumlimit (Header *h, const char **fmt, size_t df) { - size_t sz = getnum(fmt, df); - if (l_unlikely((sz - 1u) >= MAXINTSIZE)) - return cast_uint(luaL_error(h->L, - "integral size (%d) out of limits [1,%d]", sz, MAXINTSIZE)); - return cast_uint(sz); -} - - -/* -** Initialize Header -*/ -static void initheader (lua_State *L, Header *h) { - h->L = L; - h->islittle = nativeendian.little; - h->maxalign = 1; -} - - -/* -** Read and classify next option. 'size' is filled with option's size. -*/ -static KOption getoption (Header *h, const char **fmt, size_t *size) { - /* dummy structure to get native alignment requirements */ - struct cD { char c; union { LUAI_MAXALIGN; } u; }; - int opt = *((*fmt)++); - *size = 0; /* default */ - switch (opt) { - case 'b': *size = sizeof(char); return Kint; - case 'B': *size = sizeof(char); return Kuint; - case 'h': *size = sizeof(short); return Kint; - case 'H': *size = sizeof(short); return Kuint; - case 'l': *size = sizeof(long); return Kint; - case 'L': *size = sizeof(long); return Kuint; - case 'j': *size = sizeof(lua_Integer); return Kint; - case 'J': *size = sizeof(lua_Integer); return Kuint; - case 'T': *size = sizeof(size_t); return Kuint; - case 'f': *size = sizeof(float); return Kfloat; - case 'n': *size = sizeof(lua_Number); return Knumber; - case 'd': *size = sizeof(double); return Kdouble; - case 'i': *size = getnumlimit(h, fmt, sizeof(int)); return Kint; - case 'I': *size = getnumlimit(h, fmt, sizeof(int)); return Kuint; - case 's': *size = getnumlimit(h, fmt, sizeof(size_t)); return Kstring; - case 'c': - *size = getnum(fmt, cast_sizet(-1)); - if (l_unlikely(*size == cast_sizet(-1))) - luaL_error(h->L, "missing size for format option 'c'"); - return Kchar; - case 'z': return Kzstr; - case 'x': *size = 1; return Kpadding; - case 'X': return Kpaddalign; - case ' ': break; - case '<': h->islittle = 1; break; - case '>': h->islittle = 0; break; - case '=': h->islittle = nativeendian.little; break; - case '!': { - const size_t maxalign = offsetof(struct cD, u); - h->maxalign = getnumlimit(h, fmt, maxalign); - break; - } - default: luaL_error(h->L, "invalid format option '%c'", opt); - } - return Knop; -} - - -/* -** Read, classify, and fill other details about the next option. -** 'psize' is filled with option's size, 'notoalign' with its -** alignment requirements. -** Local variable 'size' gets the size to be aligned. (Kpadal option -** always gets its full alignment, other options are limited by -** the maximum alignment ('maxalign'). Kchar option needs no alignment -** despite its size. -*/ -static KOption getdetails (Header *h, size_t totalsize, const char **fmt, - size_t *psize, unsigned *ntoalign) { - KOption opt = getoption(h, fmt, psize); - size_t align = *psize; /* usually, alignment follows size */ - if (opt == Kpaddalign) { /* 'X' gets alignment from following option */ - if (**fmt == '\0' || getoption(h, fmt, &align) == Kchar || align == 0) - luaL_argerror(h->L, 1, "invalid next option for option 'X'"); - } - if (align <= 1 || opt == Kchar) /* need no alignment? */ - *ntoalign = 0; - else { - if (align > h->maxalign) /* enforce maximum alignment */ - align = h->maxalign; - if (l_unlikely(!ispow2(align))) { /* not a power of 2? */ - *ntoalign = 0; /* to avoid warnings */ - luaL_argerror(h->L, 1, "format asks for alignment not power of 2"); - } - else { - /* 'szmoda' = totalsize % align */ - unsigned szmoda = cast_uint(totalsize & (align - 1)); - *ntoalign = cast_uint((align - szmoda) & (align - 1)); - } - } - return opt; -} - - -/* -** Pack integer 'n' with 'size' bytes and 'islittle' endianness. -** The final 'if' handles the case when 'size' is larger than -** the size of a Lua integer, correcting the extra sign-extension -** bytes if necessary (by default they would be zeros). -*/ -static void packint (luaL_Buffer *b, lua_Unsigned n, - int islittle, unsigned size, int neg) { - char *buff = luaL_prepbuffsize(b, size); - unsigned i; - buff[islittle ? 0 : size - 1] = (char)(n & MC); /* first byte */ - for (i = 1; i < size; i++) { - n >>= NB; - buff[islittle ? i : size - 1 - i] = (char)(n & MC); - } - if (neg && size > SZINT) { /* negative number need sign extension? */ - for (i = SZINT; i < size; i++) /* correct extra bytes */ - buff[islittle ? i : size - 1 - i] = (char)MC; - } - luaL_addsize(b, size); /* add result to buffer */ -} - - -/* -** Copy 'size' bytes from 'src' to 'dest', correcting endianness if -** given 'islittle' is different from native endianness. -*/ -static void copywithendian (char *dest, const char *src, - unsigned size, int islittle) { - if (islittle == nativeendian.little) - memcpy(dest, src, size); - else { - dest += size - 1; - while (size-- != 0) - *(dest--) = *(src++); - } -} - - -static int str_pack (lua_State *L) { - luaL_Buffer b; - Header h; - const char *fmt = luaL_checkstring(L, 1); /* format string */ - int arg = 1; /* current argument to pack */ - size_t totalsize = 0; /* accumulate total size of result */ - initheader(L, &h); - lua_pushnil(L); /* mark to separate arguments from string buffer */ - luaL_buffinit(L, &b); - while (*fmt != '\0') { - unsigned ntoalign; - size_t size; - KOption opt = getdetails(&h, totalsize, &fmt, &size, &ntoalign); - luaL_argcheck(L, size + ntoalign <= MAX_SIZE - totalsize, arg, - "result too long"); - totalsize += ntoalign + size; - while (ntoalign-- > 0) - luaL_addchar(&b, LUAL_PACKPADBYTE); /* fill alignment */ - arg++; - switch (opt) { - case Kint: { /* signed integers */ - lua_Integer n = luaL_checkinteger(L, arg); - if (size < SZINT) { /* need overflow check? */ - lua_Integer lim = (lua_Integer)1 << ((size * NB) - 1); - luaL_argcheck(L, -lim <= n && n < lim, arg, "integer overflow"); - } - packint(&b, (lua_Unsigned)n, h.islittle, cast_uint(size), (n < 0)); - break; - } - case Kuint: { /* unsigned integers */ - lua_Integer n = luaL_checkinteger(L, arg); - if (size < SZINT) /* need overflow check? */ - luaL_argcheck(L, (lua_Unsigned)n < ((lua_Unsigned)1 << (size * NB)), - arg, "unsigned overflow"); - packint(&b, (lua_Unsigned)n, h.islittle, cast_uint(size), 0); - break; - } - case Kfloat: { /* C float */ - float f = (float)luaL_checknumber(L, arg); /* get argument */ - char *buff = luaL_prepbuffsize(&b, sizeof(f)); - /* move 'f' to final result, correcting endianness if needed */ - copywithendian(buff, (char *)&f, sizeof(f), h.islittle); - luaL_addsize(&b, size); - break; - } - case Knumber: { /* Lua float */ - lua_Number f = luaL_checknumber(L, arg); /* get argument */ - char *buff = luaL_prepbuffsize(&b, sizeof(f)); - /* move 'f' to final result, correcting endianness if needed */ - copywithendian(buff, (char *)&f, sizeof(f), h.islittle); - luaL_addsize(&b, size); - break; - } - case Kdouble: { /* C double */ - double f = (double)luaL_checknumber(L, arg); /* get argument */ - char *buff = luaL_prepbuffsize(&b, sizeof(f)); - /* move 'f' to final result, correcting endianness if needed */ - copywithendian(buff, (char *)&f, sizeof(f), h.islittle); - luaL_addsize(&b, size); - break; - } - case Kchar: { /* fixed-size string */ - size_t len; - const char *s = luaL_checklstring(L, arg, &len); - luaL_argcheck(L, len <= size, arg, "string longer than given size"); - luaL_addlstring(&b, s, len); /* add string */ - if (len < size) { /* does it need padding? */ - size_t psize = size - len; /* pad size */ - char *buff = luaL_prepbuffsize(&b, psize); - memset(buff, LUAL_PACKPADBYTE, psize); - luaL_addsize(&b, psize); - } - break; - } - case Kstring: { /* strings with length count */ - size_t len; - const char *s = luaL_checklstring(L, arg, &len); - luaL_argcheck(L, size >= sizeof(lua_Unsigned) || - len < ((lua_Unsigned)1 << (size * NB)), - arg, "string length does not fit in given size"); - /* pack length */ - packint(&b, (lua_Unsigned)len, h.islittle, cast_uint(size), 0); - luaL_addlstring(&b, s, len); - totalsize += len; - break; - } - case Kzstr: { /* zero-terminated string */ - size_t len; - const char *s = luaL_checklstring(L, arg, &len); - luaL_argcheck(L, strlen(s) == len, arg, "string contains zeros"); - luaL_addlstring(&b, s, len); - luaL_addchar(&b, '\0'); /* add zero at the end */ - totalsize += len + 1; - break; - } - case Kpadding: luaL_addchar(&b, LUAL_PACKPADBYTE); /* FALLTHROUGH */ - case Kpaddalign: case Knop: - arg--; /* undo increment */ - break; - } - } - luaL_pushresult(&b); - return 1; -} - - -static int str_packsize (lua_State *L) { - Header h; - const char *fmt = luaL_checkstring(L, 1); /* format string */ - size_t totalsize = 0; /* accumulate total size of result */ - initheader(L, &h); - while (*fmt != '\0') { - unsigned ntoalign; - size_t size; - KOption opt = getdetails(&h, totalsize, &fmt, &size, &ntoalign); - luaL_argcheck(L, opt != Kstring && opt != Kzstr, 1, - "variable-length format"); - size += ntoalign; /* total space used by option */ - luaL_argcheck(L, totalsize <= MAX_SIZE - size, - 1, "format result too large"); - totalsize += size; - } - lua_pushinteger(L, cast_st2S(totalsize)); - return 1; -} - - -/* -** Unpack an integer with 'size' bytes and 'islittle' endianness. -** If size is smaller than the size of a Lua integer and integer -** is signed, must do sign extension (propagating the sign to the -** higher bits); if size is larger than the size of a Lua integer, -** it must check the unread bytes to see whether they do not cause an -** overflow. -*/ -static lua_Integer unpackint (lua_State *L, const char *str, - int islittle, int size, int issigned) { - lua_Unsigned res = 0; - int i; - int limit = (size <= SZINT) ? size : SZINT; - for (i = limit - 1; i >= 0; i--) { - res <<= NB; - res |= (lua_Unsigned)(unsigned char)str[islittle ? i : size - 1 - i]; - } - if (size < SZINT) { /* real size smaller than lua_Integer? */ - if (issigned) { /* needs sign extension? */ - lua_Unsigned mask = (lua_Unsigned)1 << (size*NB - 1); - res = ((res ^ mask) - mask); /* do sign extension */ - } - } - else if (size > SZINT) { /* must check unread bytes */ - int mask = (!issigned || (lua_Integer)res >= 0) ? 0 : MC; - for (i = limit; i < size; i++) { - if (l_unlikely((unsigned char)str[islittle ? i : size - 1 - i] != mask)) - luaL_error(L, "%d-byte integer does not fit into Lua Integer", size); - } - } - return (lua_Integer)res; -} - - -static int str_unpack (lua_State *L) { - Header h; - const char *fmt = luaL_checkstring(L, 1); - size_t ld; - const char *data = luaL_checklstring(L, 2, &ld); - size_t pos = posrelatI(luaL_optinteger(L, 3, 1), ld) - 1; - int n = 0; /* number of results */ - luaL_argcheck(L, pos <= ld, 3, "initial position out of string"); - initheader(L, &h); - while (*fmt != '\0') { - unsigned ntoalign; - size_t size; - KOption opt = getdetails(&h, pos, &fmt, &size, &ntoalign); - luaL_argcheck(L, ntoalign + size <= ld - pos, 2, - "data string too short"); - pos += ntoalign; /* skip alignment */ - /* stack space for item + next position */ - luaL_checkstack(L, 2, "too many results"); - n++; - switch (opt) { - case Kint: - case Kuint: { - lua_Integer res = unpackint(L, data + pos, h.islittle, - cast_int(size), (opt == Kint)); - lua_pushinteger(L, res); - break; - } - case Kfloat: { - float f; - copywithendian((char *)&f, data + pos, sizeof(f), h.islittle); - lua_pushnumber(L, (lua_Number)f); - break; - } - case Knumber: { - lua_Number f; - copywithendian((char *)&f, data + pos, sizeof(f), h.islittle); - lua_pushnumber(L, f); - break; - } - case Kdouble: { - double f; - copywithendian((char *)&f, data + pos, sizeof(f), h.islittle); - lua_pushnumber(L, (lua_Number)f); - break; - } - case Kchar: { - lua_pushlstring(L, data + pos, size); - break; - } - case Kstring: { - lua_Unsigned len = (lua_Unsigned)unpackint(L, data + pos, - h.islittle, cast_int(size), 0); - luaL_argcheck(L, len <= ld - pos - size, 2, "data string too short"); - lua_pushlstring(L, data + pos + size, cast_sizet(len)); - pos += cast_sizet(len); /* skip string */ - break; - } - case Kzstr: { - size_t len = strlen(data + pos); - luaL_argcheck(L, pos + len < ld, 2, - "unfinished string for format 'z'"); - lua_pushlstring(L, data + pos, len); - pos += len + 1; /* skip string plus final '\0' */ - break; - } - case Kpaddalign: case Kpadding: case Knop: - n--; /* undo increment */ - break; - } - pos += size; - } - lua_pushinteger(L, cast_st2S(pos) + 1); /* next position */ - return n + 1; -} - -/* }====================================================== */ - - -static const luaL_Reg strlib[] = { - {"byte", str_byte}, - {"char", str_char}, - {"dump", str_dump}, - {"find", str_find}, - {"format", str_format}, - {"gmatch", gmatch}, - {"gsub", str_gsub}, - {"len", str_len}, - {"lower", str_lower}, - {"match", str_match}, - {"rep", str_rep}, - {"reverse", str_reverse}, - {"sub", str_sub}, - {"upper", str_upper}, - {"pack", str_pack}, - {"packsize", str_packsize}, - {"unpack", str_unpack}, - {NULL, NULL} -}; - - -static void createmetatable (lua_State *L) { - /* table to be metatable for strings */ - luaL_newlibtable(L, stringmetamethods); - luaL_setfuncs(L, stringmetamethods, 0); - lua_pushliteral(L, ""); /* dummy string */ - lua_pushvalue(L, -2); /* copy table */ - lua_setmetatable(L, -2); /* set table as metatable for strings */ - lua_pop(L, 1); /* pop dummy string */ - lua_pushvalue(L, -2); /* get string library */ - lua_setfield(L, -2, "__index"); /* metatable.__index = string */ - lua_pop(L, 1); /* pop metatable */ -} - - -/* -** Open string library -*/ -LUAMOD_API int luaopen_string (lua_State *L) { - luaL_newlib(L, strlib); - createmetatable(L); - return 1; -} - diff --git a/lib/lua/ltable.c b/lib/lua/ltable.c deleted file mode 100644 index 2f2b5c1..0000000 --- a/lib/lua/ltable.c +++ /dev/null @@ -1,1355 +0,0 @@ -/* -** $Id: ltable.c $ -** Lua tables (hash) -** See Copyright Notice in lua.h -*/ - -#define ltable_c -#define LUA_CORE - -#include "lprefix.h" - - -/* -** Implementation of tables (aka arrays, objects, or hash tables). -** Tables keep its elements in two parts: an array part and a hash part. -** Non-negative integer keys are all candidates to be kept in the array -** part. The actual size of the array is the largest 'n' such that -** more than half the slots between 1 and n are in use. -** Hash uses a mix of chained scatter table with Brent's variation. -** A main invariant of these tables is that, if an element is not -** in its main position (i.e. the 'original' position that its hash gives -** to it), then the colliding element is in its own main position. -** Hence even when the load factor reaches 100%, performance remains good. -*/ - -#include -#include -#include - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lgc.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "lvm.h" - - -/* -** Only hash parts with at least 2^LIMFORLAST have a 'lastfree' field -** that optimizes finding a free slot. That field is stored just before -** the array of nodes, in the same block. Smaller tables do a complete -** search when looking for a free slot. -*/ -#define LIMFORLAST 3 /* log2 of real limit (8) */ - -/* -** The union 'Limbox' stores 'lastfree' and ensures that what follows it -** is properly aligned to store a Node. -*/ -typedef struct { Node *dummy; Node follows_pNode; } Limbox_aux; - -typedef union { - Node *lastfree; - char padding[offsetof(Limbox_aux, follows_pNode)]; -} Limbox; - -#define haslastfree(t) ((t)->lsizenode >= LIMFORLAST) -#define getlastfree(t) ((cast(Limbox *, (t)->node) - 1)->lastfree) - - -/* -** MAXABITS is the largest integer such that 2^MAXABITS fits in an -** unsigned int. -*/ -#define MAXABITS (l_numbits(int) - 1) - - -/* -** MAXASIZEB is the maximum number of elements in the array part such -** that the size of the array fits in 'size_t'. -*/ -#define MAXASIZEB (MAX_SIZET/(sizeof(Value) + 1)) - - -/* -** MAXASIZE is the maximum size of the array part. It is the minimum -** between 2^MAXABITS and MAXASIZEB. -*/ -#define MAXASIZE \ - (((1u << MAXABITS) < MAXASIZEB) ? (1u << MAXABITS) : cast_uint(MAXASIZEB)) - -/* -** MAXHBITS is the largest integer such that 2^MAXHBITS fits in a -** signed int. -*/ -#define MAXHBITS (MAXABITS - 1) - - -/* -** MAXHSIZE is the maximum size of the hash part. It is the minimum -** between 2^MAXHBITS and the maximum size such that, measured in bytes, -** it fits in a 'size_t'. -*/ -#define MAXHSIZE luaM_limitN(1 << MAXHBITS, Node) - - -/* -** When the original hash value is good, hashing by a power of 2 -** avoids the cost of '%'. -*/ -#define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t)))) - -/* -** for other types, it is better to avoid modulo by power of 2, as -** they can have many 2 factors. -*/ -#define hashmod(t,n) (gnode(t, ((n) % ((sizenode(t)-1u)|1u)))) - - -#define hashstr(t,str) hashpow2(t, (str)->hash) -#define hashboolean(t,p) hashpow2(t, p) - - -#define hashpointer(t,p) hashmod(t, point2uint(p)) - - -#define dummynode (&dummynode_) - -/* -** Common hash part for tables with empty hash parts. That allows all -** tables to have a hash part, avoiding an extra check ("is there a hash -** part?") when indexing. Its sole node has an empty value and a key -** (DEADKEY, NULL) that is different from any valid TValue. -*/ -static const Node dummynode_ = { - {{NULL}, LUA_VEMPTY, /* value's value and type */ - LUA_TDEADKEY, 0, {NULL}} /* key type, next, and key value */ -}; - - -static const TValue absentkey = {ABSTKEYCONSTANT}; - - -/* -** Hash for integers. To allow a good hash, use the remainder operator -** ('%'). If integer fits as a non-negative int, compute an int -** remainder, which is faster. Otherwise, use an unsigned-integer -** remainder, which uses all bits and ensures a non-negative result. -*/ -static Node *hashint (const Table *t, lua_Integer i) { - lua_Unsigned ui = l_castS2U(i); - if (ui <= cast_uint(INT_MAX)) - return gnode(t, cast_int(ui) % cast_int((sizenode(t)-1) | 1)); - else - return hashmod(t, ui); -} - - -/* -** Hash for floating-point numbers. -** The main computation should be just -** n = frexp(n, &i); return (n * INT_MAX) + i -** but there are some numerical subtleties. -** In a two-complement representation, INT_MAX may not have an exact -** representation as a float, but INT_MIN does; because the absolute -** value of 'frexp' is smaller than 1 (unless 'n' is inf/NaN), the -** absolute value of the product 'frexp * -INT_MIN' is smaller or equal -** to INT_MAX. Next, the use of 'unsigned int' avoids overflows when -** adding 'i'; the use of '~u' (instead of '-u') avoids problems with -** INT_MIN. -*/ -#if !defined(l_hashfloat) -static unsigned l_hashfloat (lua_Number n) { - int i; - lua_Integer ni; - n = l_mathop(frexp)(n, &i) * -cast_num(INT_MIN); - if (!lua_numbertointeger(n, &ni)) { /* is 'n' inf/-inf/NaN? */ - lua_assert(luai_numisnan(n) || l_mathop(fabs)(n) == cast_num(HUGE_VAL)); - return 0; - } - else { /* normal case */ - unsigned int u = cast_uint(i) + cast_uint(ni); - return (u <= cast_uint(INT_MAX) ? u : ~u); - } -} -#endif - - -/* -** returns the 'main' position of an element in a table (that is, -** the index of its hash value). -*/ -static Node *mainpositionTV (const Table *t, const TValue *key) { - switch (ttypetag(key)) { - case LUA_VNUMINT: { - lua_Integer i = ivalue(key); - return hashint(t, i); - } - case LUA_VNUMFLT: { - lua_Number n = fltvalue(key); - return hashmod(t, l_hashfloat(n)); - } - case LUA_VSHRSTR: { - TString *ts = tsvalue(key); - return hashstr(t, ts); - } - case LUA_VLNGSTR: { - TString *ts = tsvalue(key); - return hashpow2(t, luaS_hashlongstr(ts)); - } - case LUA_VFALSE: - return hashboolean(t, 0); - case LUA_VTRUE: - return hashboolean(t, 1); - case LUA_VLIGHTUSERDATA: { - void *p = pvalue(key); - return hashpointer(t, p); - } - case LUA_VLCF: { - lua_CFunction f = fvalue(key); - return hashpointer(t, f); - } - default: { - GCObject *o = gcvalue(key); - return hashpointer(t, o); - } - } -} - - -l_sinline Node *mainpositionfromnode (const Table *t, Node *nd) { - TValue key; - getnodekey(cast(lua_State *, NULL), &key, nd); - return mainpositionTV(t, &key); -} - - -/* -** Check whether key 'k1' is equal to the key in node 'n2'. This -** equality is raw, so there are no metamethods. Floats with integer -** values have been normalized, so integers cannot be equal to -** floats. It is assumed that 'eqshrstr' is simply pointer equality, -** so that short strings are handled in the default case. The flag -** 'deadok' means to accept dead keys as equal to their original values. -** (Only collectable objects can produce dead keys.) Note that dead -** long strings are also compared by identity. Once a key is dead, -** its corresponding value may be collected, and then another value -** can be created with the same address. If this other value is given -** to 'next', 'equalkey' will signal a false positive. In a regular -** traversal, this situation should never happen, as all keys given to -** 'next' came from the table itself, and therefore could not have been -** collected. Outside a regular traversal, we have garbage in, garbage -** out. What is relevant is that this false positive does not break -** anything. (In particular, 'next' will return some other valid item -** on the table or nil.) -*/ -static int equalkey (const TValue *k1, const Node *n2, int deadok) { - if (rawtt(k1) != keytt(n2)) { /* not the same variants? */ - if (keyisshrstr(n2) && ttislngstring(k1)) { - /* an external string can be equal to a short-string key */ - return luaS_eqstr(tsvalue(k1), keystrval(n2)); - } - else if (deadok && keyisdead(n2) && iscollectable(k1)) { - /* a collectable value can be equal to a dead key */ - return gcvalue(k1) == gcvalueraw(keyval(n2)); - } - else - return 0; /* otherwise, different variants cannot be equal */ - } - else { /* equal variants */ - switch (keytt(n2)) { - case LUA_VNIL: case LUA_VFALSE: case LUA_VTRUE: - return 1; - case LUA_VNUMINT: - return (ivalue(k1) == keyival(n2)); - case LUA_VNUMFLT: - return luai_numeq(fltvalue(k1), fltvalueraw(keyval(n2))); - case LUA_VLIGHTUSERDATA: - return pvalue(k1) == pvalueraw(keyval(n2)); - case LUA_VLCF: - return fvalue(k1) == fvalueraw(keyval(n2)); - case ctb(LUA_VLNGSTR): - return luaS_eqstr(tsvalue(k1), keystrval(n2)); - default: - return gcvalue(k1) == gcvalueraw(keyval(n2)); - } - } -} - - -/* -** "Generic" get version. (Not that generic: not valid for integers, -** which may be in array part, nor for floats with integral values.) -** See explanation about 'deadok' in function 'equalkey'. -*/ -static const TValue *getgeneric (Table *t, const TValue *key, int deadok) { - Node *n = mainpositionTV(t, key); - for (;;) { /* check whether 'key' is somewhere in the chain */ - if (equalkey(key, n, deadok)) - return gval(n); /* that's it */ - else { - int nx = gnext(n); - if (nx == 0) - return &absentkey; /* not found */ - n += nx; - } - } -} - - -/* -** Return the index 'k' (converted to an unsigned) if it is inside -** the range [1, limit]. -*/ -static unsigned checkrange (lua_Integer k, unsigned limit) { - return (l_castS2U(k) - 1u < limit) ? cast_uint(k) : 0; -} - - -/* -** Return the index 'k' if 'k' is an appropriate key to live in the -** array part of a table, 0 otherwise. -*/ -#define arrayindex(k) checkrange(k, MAXASIZE) - - -/* -** Check whether an integer key is in the array part of a table and -** return its index there, or zero. -*/ -#define ikeyinarray(t,k) checkrange(k, t->asize) - - -/* -** Check whether a key is in the array part of a table and return its -** index there, or zero. -*/ -static unsigned keyinarray (Table *t, const TValue *key) { - return (ttisinteger(key)) ? ikeyinarray(t, ivalue(key)) : 0; -} - - -/* -** returns the index of a 'key' for table traversals. First goes all -** elements in the array part, then elements in the hash part. The -** beginning of a traversal is signaled by 0. -*/ -static unsigned findindex (lua_State *L, Table *t, TValue *key, - unsigned asize) { - unsigned int i; - if (ttisnil(key)) return 0; /* first iteration */ - i = keyinarray(t, key); - if (i != 0) /* is 'key' inside array part? */ - return i; /* yes; that's the index */ - else { - const TValue *n = getgeneric(t, key, 1); - if (l_unlikely(isabstkey(n))) - luaG_runerror(L, "invalid key to 'next'"); /* key not found */ - i = cast_uint(nodefromval(n) - gnode(t, 0)); /* key index in hash table */ - /* hash elements are numbered after array ones */ - return (i + 1) + asize; - } -} - - -int luaH_next (lua_State *L, Table *t, StkId key) { - unsigned int asize = t->asize; - unsigned int i = findindex(L, t, s2v(key), asize); /* find original key */ - for (; i < asize; i++) { /* try first array part */ - lu_byte tag = *getArrTag(t, i); - if (!tagisempty(tag)) { /* a non-empty entry? */ - setivalue(s2v(key), cast_int(i) + 1); - farr2val(t, i, tag, s2v(key + 1)); - return 1; - } - } - for (i -= asize; i < sizenode(t); i++) { /* hash part */ - if (!isempty(gval(gnode(t, i)))) { /* a non-empty entry? */ - Node *n = gnode(t, i); - getnodekey(L, s2v(key), n); - setobj2s(L, key + 1, gval(n)); - return 1; - } - } - return 0; /* no more elements */ -} - - -/* Extra space in Node array if it has a lastfree entry */ -#define extraLastfree(t) (haslastfree(t) ? sizeof(Limbox) : 0) - -/* 'node' size in bytes */ -static size_t sizehash (Table *t) { - return cast_sizet(sizenode(t)) * sizeof(Node) + extraLastfree(t); -} - - -static void freehash (lua_State *L, Table *t) { - if (!isdummy(t)) { - /* get pointer to the beginning of Node array */ - char *arr = cast_charp(t->node) - extraLastfree(t); - luaM_freearray(L, arr, sizehash(t)); - } -} - - -/* -** {============================================================= -** Rehash -** ============================================================== -*/ - -static int insertkey (Table *t, const TValue *key, TValue *value); -static void newcheckedkey (Table *t, const TValue *key, TValue *value); - - -/* -** Structure to count the keys in a table. -** 'total' is the total number of keys in the table. -** 'na' is the number of *array indices* in the table (see 'arrayindex'). -** 'deleted' is true if there are deleted nodes in the hash part. -** 'nums' is a "count array" where 'nums[i]' is the number of integer -** keys between 2^(i - 1) + 1 and 2^i. Note that 'na' is the summation -** of 'nums'. -*/ -typedef struct { - unsigned total; - unsigned na; - int deleted; - unsigned nums[MAXABITS + 1]; -} Counters; - - -/* -** Check whether it is worth to use 'na' array entries instead of 'nh' -** hash nodes. (A hash node uses ~3 times more memory than an array -** entry: Two values plus 'next' versus one value.) Evaluate with size_t -** to avoid overflows. -*/ -#define arrayXhash(na,nh) (cast_sizet(na) <= cast_sizet(nh) * 3) - -/* -** Compute the optimal size for the array part of table 't'. -** This size maximizes the number of elements going to the array part -** while satisfying the condition 'arrayXhash' with the use of memory if -** all those elements went to the hash part. -** 'ct->na' enters with the total number of array indices in the table -** and leaves with the number of keys that will go to the array part; -** return the optimal size for the array part. -*/ -static unsigned computesizes (Counters *ct) { - int i; - unsigned int twotoi; /* 2^i (candidate for optimal size) */ - unsigned int a = 0; /* number of elements smaller than 2^i */ - unsigned int na = 0; /* number of elements to go to array part */ - unsigned int optimal = 0; /* optimal size for array part */ - /* traverse slices while 'twotoi' does not overflow and total of array - indices still can satisfy 'arrayXhash' against the array size */ - for (i = 0, twotoi = 1; - twotoi > 0 && arrayXhash(twotoi, ct->na); - i++, twotoi *= 2) { - unsigned nums = ct->nums[i]; - a += nums; - if (nums > 0 && /* grows array only if it gets more elements... */ - arrayXhash(twotoi, a)) { /* ...while using "less memory" */ - optimal = twotoi; /* optimal size (till now) */ - na = a; /* all elements up to 'optimal' will go to array part */ - } - } - ct->na = na; - return optimal; -} - - -static void countint (lua_Integer key, Counters *ct) { - unsigned int k = arrayindex(key); - if (k != 0) { /* is 'key' an array index? */ - ct->nums[luaO_ceillog2(k)]++; /* count as such */ - ct->na++; - } -} - - -l_sinline int arraykeyisempty (const Table *t, unsigned key) { - int tag = *getArrTag(t, key - 1); - return tagisempty(tag); -} - - -/* -** Count keys in array part of table 't'. -*/ -static void numusearray (const Table *t, Counters *ct) { - int lg; - unsigned int ttlg; /* 2^lg */ - unsigned int ause = 0; /* summation of 'nums' */ - unsigned int i = 1; /* index to traverse all array keys */ - unsigned int asize = t->asize; - /* traverse each slice */ - for (lg = 0, ttlg = 1; lg <= MAXABITS; lg++, ttlg *= 2) { - unsigned int lc = 0; /* counter */ - unsigned int lim = ttlg; - if (lim > asize) { - lim = asize; /* adjust upper limit */ - if (i > lim) - break; /* no more elements to count */ - } - /* count elements in range (2^(lg - 1), 2^lg] */ - for (; i <= lim; i++) { - if (!arraykeyisempty(t, i)) - lc++; - } - ct->nums[lg] += lc; - ause += lc; - } - ct->total += ause; - ct->na += ause; -} - - -/* -** Count keys in hash part of table 't'. As this only happens during -** a rehash, all nodes have been used. A node can have a nil value only -** if it was deleted after being created. -*/ -static void numusehash (const Table *t, Counters *ct) { - unsigned i = sizenode(t); - unsigned total = 0; - while (i--) { - Node *n = &t->node[i]; - if (isempty(gval(n))) { - lua_assert(!keyisnil(n)); /* entry was deleted; key cannot be nil */ - ct->deleted = 1; - } - else { - total++; - if (keyisinteger(n)) - countint(keyival(n), ct); - } - } - ct->total += total; -} - - -/* -** Convert an "abstract size" (number of slots in an array) to -** "concrete size" (number of bytes in the array). -*/ -static size_t concretesize (unsigned int size) { - if (size == 0) - return 0; - else /* space for the two arrays plus an unsigned in between */ - return size * (sizeof(Value) + 1) + sizeof(unsigned); -} - - -/* -** Resize the array part of a table. If new size is equal to the old, -** do nothing. Else, if new size is zero, free the old array. (It must -** be present, as the sizes are different.) Otherwise, allocate a new -** array, move the common elements to new proper position, and then -** frees the old array. -** We could reallocate the array, but we still would need to move the -** elements to their new position, so the copy implicit in realloc is a -** waste. Moreover, most allocators will move the array anyway when the -** new size is double the old one (the most common case). -*/ -static Value *resizearray (lua_State *L , Table *t, - unsigned oldasize, - unsigned newasize) { - if (oldasize == newasize) - return t->array; /* nothing to be done */ - else if (newasize == 0) { /* erasing array? */ - Value *op = t->array - oldasize; /* original array's real address */ - luaM_freemem(L, op, concretesize(oldasize)); /* free it */ - return NULL; - } - else { - size_t newasizeb = concretesize(newasize); - Value *np = cast(Value *, - luaM_reallocvector(L, NULL, 0, newasizeb, lu_byte)); - if (np == NULL) /* allocation error? */ - return NULL; - np += newasize; /* shift pointer to the end of value segment */ - if (oldasize > 0) { - /* move common elements to new position */ - size_t oldasizeb = concretesize(oldasize); - Value *op = t->array; /* original array */ - unsigned tomove = (oldasize < newasize) ? oldasize : newasize; - size_t tomoveb = (oldasize < newasize) ? oldasizeb : newasizeb; - lua_assert(tomoveb > 0); - memcpy(np - tomove, op - tomove, tomoveb); - luaM_freemem(L, op - oldasize, oldasizeb); /* free old block */ - } - return np; - } -} - - -/* -** Creates an array for the hash part of a table with the given -** size, or reuses the dummy node if size is zero. -** The computation for size overflow is in two steps: the first -** comparison ensures that the shift in the second one does not -** overflow. -*/ -static void setnodevector (lua_State *L, Table *t, unsigned size) { - if (size == 0) { /* no elements to hash part? */ - t->node = cast(Node *, dummynode); /* use common 'dummynode' */ - t->lsizenode = 0; - setdummy(t); /* signal that it is using dummy node */ - } - else { - int i; - int lsize = luaO_ceillog2(size); - if (lsize > MAXHBITS || (1 << lsize) > MAXHSIZE) - luaG_runerror(L, "table overflow"); - size = twoto(lsize); - if (lsize < LIMFORLAST) /* no 'lastfree' field? */ - t->node = luaM_newvector(L, size, Node); - else { - size_t bsize = size * sizeof(Node) + sizeof(Limbox); - char *node = luaM_newblock(L, bsize); - t->node = cast(Node *, node + sizeof(Limbox)); - getlastfree(t) = gnode(t, size); /* all positions are free */ - } - t->lsizenode = cast_byte(lsize); - setnodummy(t); - for (i = 0; i < cast_int(size); i++) { - Node *n = gnode(t, i); - gnext(n) = 0; - setnilkey(n); - setempty(gval(n)); - } - } -} - - -/* -** (Re)insert all elements from the hash part of 'ot' into table 't'. -*/ -static void reinserthash (lua_State *L, Table *ot, Table *t) { - unsigned j; - unsigned size = sizenode(ot); - for (j = 0; j < size; j++) { - Node *old = gnode(ot, j); - if (!isempty(gval(old))) { - /* doesn't need barrier/invalidate cache, as entry was - already present in the table */ - TValue k; - getnodekey(L, &k, old); - newcheckedkey(t, &k, gval(old)); - } - } -} - - -/* -** Exchange the hash part of 't1' and 't2'. (In 'flags', only the dummy -** bit must be exchanged: The metamethod bits do not change during a -** resize, so the "real" table can keep their values.) -*/ -static void exchangehashpart (Table *t1, Table *t2) { - lu_byte lsizenode = t1->lsizenode; - Node *node = t1->node; - int bitdummy1 = t1->flags & BITDUMMY; - t1->lsizenode = t2->lsizenode; - t1->node = t2->node; - t1->flags = cast_byte((t1->flags & NOTBITDUMMY) | (t2->flags & BITDUMMY)); - t2->lsizenode = lsizenode; - t2->node = node; - t2->flags = cast_byte((t2->flags & NOTBITDUMMY) | bitdummy1); -} - - -/* -** Re-insert into the new hash part of a table the elements from the -** vanishing slice of the array part. -*/ -static void reinsertOldSlice (Table *t, unsigned oldasize, - unsigned newasize) { - unsigned i; - for (i = newasize; i < oldasize; i++) { /* traverse vanishing slice */ - lu_byte tag = *getArrTag(t, i); - if (!tagisempty(tag)) { /* a non-empty entry? */ - TValue key, aux; - setivalue(&key, l_castU2S(i) + 1); /* make the key */ - farr2val(t, i, tag, &aux); /* copy value into 'aux' */ - insertkey(t, &key, &aux); /* insert entry into the hash part */ - } - } -} - - -/* -** Clear new slice of the array. -*/ -static void clearNewSlice (Table *t, unsigned oldasize, unsigned newasize) { - for (; oldasize < newasize; oldasize++) - *getArrTag(t, oldasize) = LUA_VEMPTY; -} - - -/* -** Resize table 't' for the new given sizes. Both allocations (for -** the hash part and for the array part) can fail, which creates some -** subtleties. If the first allocation, for the hash part, fails, an -** error is raised and that is it. Otherwise, it copies the elements from -** the shrinking part of the array (if it is shrinking) into the new -** hash. Then it reallocates the array part. If that fails, the table -** is in its original state; the function frees the new hash part and then -** raises the allocation error. Otherwise, it sets the new hash part -** into the table, initializes the new part of the array (if any) with -** nils and reinserts the elements of the old hash back into the new -** parts of the table. -** Note that if the new size for the array part ('newasize') is equal to -** the old one ('oldasize'), this function will do nothing with that -** part. -*/ -void luaH_resize (lua_State *L, Table *t, unsigned newasize, - unsigned nhsize) { - Table newt; /* to keep the new hash part */ - unsigned oldasize = t->asize; - Value *newarray; - if (newasize > MAXASIZE) - luaG_runerror(L, "table overflow"); - /* create new hash part with appropriate size into 'newt' */ - newt.flags = 0; - setnodevector(L, &newt, nhsize); - if (newasize < oldasize) { /* will array shrink? */ - /* re-insert into the new hash the elements from vanishing slice */ - exchangehashpart(t, &newt); /* pretend table has new hash */ - reinsertOldSlice(t, oldasize, newasize); - exchangehashpart(t, &newt); /* restore old hash (in case of errors) */ - } - /* allocate new array */ - newarray = resizearray(L, t, oldasize, newasize); - if (l_unlikely(newarray == NULL && newasize > 0)) { /* allocation failed? */ - freehash(L, &newt); /* release new hash part */ - luaM_error(L); /* raise error (with array unchanged) */ - } - /* allocation ok; initialize new part of the array */ - exchangehashpart(t, &newt); /* 't' has the new hash ('newt' has the old) */ - t->array = newarray; /* set new array part */ - t->asize = newasize; - if (newarray != NULL) - *lenhint(t) = newasize / 2u; /* set an initial hint */ - clearNewSlice(t, oldasize, newasize); - /* re-insert elements from old hash part into new parts */ - reinserthash(L, &newt, t); /* 'newt' now has the old hash */ - freehash(L, &newt); /* free old hash part */ -} - - -void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize) { - unsigned nsize = allocsizenode(t); - luaH_resize(L, t, nasize, nsize); -} - - -/* -** Rehash a table. First, count its keys. If there are array indices -** outside the array part, compute the new best size for that part. -** Then, resize the table. -*/ -static void rehash (lua_State *L, Table *t, const TValue *ek) { - unsigned asize; /* optimal size for array part */ - Counters ct; - unsigned i; - unsigned nsize; /* size for the hash part */ - /* reset counts */ - for (i = 0; i <= MAXABITS; i++) ct.nums[i] = 0; - ct.na = 0; - ct.deleted = 0; - ct.total = 1; /* count extra key */ - if (ttisinteger(ek)) - countint(ivalue(ek), &ct); /* extra key may go to array */ - numusehash(t, &ct); /* count keys in hash part */ - if (ct.na == 0) { - /* no new keys to enter array part; keep it with the same size */ - asize = t->asize; - } - else { /* compute best size for array part */ - numusearray(t, &ct); /* count keys in array part */ - asize = computesizes(&ct); /* compute new size for array part */ - } - /* all keys not in the array part go to the hash part */ - nsize = ct.total - ct.na; - if (ct.deleted) { /* table has deleted entries? */ - /* insertion-deletion-insertion: give hash some extra size to - avoid repeated resizings */ - nsize += nsize >> 2; - } - /* resize the table to new computed sizes */ - luaH_resize(L, t, asize, nsize); -} - -/* -** }============================================================= -*/ - - -Table *luaH_new (lua_State *L) { - GCObject *o = luaC_newobj(L, LUA_VTABLE, sizeof(Table)); - Table *t = gco2t(o); - t->metatable = NULL; - t->flags = maskflags; /* table has no metamethod fields */ - t->array = NULL; - t->asize = 0; - setnodevector(L, t, 0); - return t; -} - - -lu_mem luaH_size (Table *t) { - lu_mem sz = cast(lu_mem, sizeof(Table)) + concretesize(t->asize); - if (!isdummy(t)) - sz += sizehash(t); - return sz; -} - - -/* -** Frees a table. -*/ -void luaH_free (lua_State *L, Table *t) { - freehash(L, t); - resizearray(L, t, t->asize, 0); - luaM_free(L, t); -} - - -static Node *getfreepos (Table *t) { - if (haslastfree(t)) { /* does it have 'lastfree' information? */ - /* look for a spot before 'lastfree', updating 'lastfree' */ - while (getlastfree(t) > t->node) { - Node *free = --getlastfree(t); - if (keyisnil(free)) - return free; - } - } - else { /* no 'lastfree' information */ - unsigned i = sizenode(t); - while (i--) { /* do a linear search */ - Node *free = gnode(t, i); - if (keyisnil(free)) - return free; - } - } - return NULL; /* could not find a free place */ -} - - - -/* -** Inserts a new key into a hash table; first, check whether key's main -** position is free. If not, check whether colliding node is in its main -** position or not: if it is not, move colliding node to an empty place -** and put new key in its main position; otherwise (colliding node is in -** its main position), new key goes to an empty position. Return 0 if -** could not insert key (could not find a free space). -*/ -static int insertkey (Table *t, const TValue *key, TValue *value) { - Node *mp = mainpositionTV(t, key); - /* table cannot already contain the key */ - lua_assert(isabstkey(getgeneric(t, key, 0))); - if (!isempty(gval(mp)) || isdummy(t)) { /* main position is taken? */ - Node *othern; - Node *f = getfreepos(t); /* get a free place */ - if (f == NULL) /* cannot find a free place? */ - return 0; - lua_assert(!isdummy(t)); - othern = mainpositionfromnode(t, mp); - if (othern != mp) { /* is colliding node out of its main position? */ - /* yes; move colliding node into free position */ - while (othern + gnext(othern) != mp) /* find previous */ - othern += gnext(othern); - gnext(othern) = cast_int(f - othern); /* rechain to point to 'f' */ - *f = *mp; /* copy colliding node into free pos. (mp->next also goes) */ - if (gnext(mp) != 0) { - gnext(f) += cast_int(mp - f); /* correct 'next' */ - gnext(mp) = 0; /* now 'mp' is free */ - } - setempty(gval(mp)); - } - else { /* colliding node is in its own main position */ - /* new node will go into free position */ - if (gnext(mp) != 0) - gnext(f) = cast_int((mp + gnext(mp)) - f); /* chain new position */ - else lua_assert(gnext(f) == 0); - gnext(mp) = cast_int(f - mp); - mp = f; - } - } - setnodekey(mp, key); - lua_assert(isempty(gval(mp))); - setobj2t(cast(lua_State *, 0), gval(mp), value); - return 1; -} - - -/* -** Insert a key in a table where there is space for that key, the -** key is valid, and the value is not nil. -*/ -static void newcheckedkey (Table *t, const TValue *key, TValue *value) { - unsigned i = keyinarray(t, key); - if (i > 0) /* is key in the array part? */ - obj2arr(t, i - 1, value); /* set value in the array */ - else { - int done = insertkey(t, key, value); /* insert key in the hash part */ - lua_assert(done); /* it cannot fail */ - cast(void, done); /* to avoid warnings */ - } -} - - -static void luaH_newkey (lua_State *L, Table *t, const TValue *key, - TValue *value) { - if (!ttisnil(value)) { /* do not insert nil values */ - int done = insertkey(t, key, value); - if (!done) { /* could not find a free place? */ - rehash(L, t, key); /* grow table */ - newcheckedkey(t, key, value); /* insert key in grown table */ - } - luaC_barrierback(L, obj2gco(t), key); - /* for debugging only: any new key may force an emergency collection */ - condchangemem(L, (void)0, (void)0, 1); - } -} - - -static const TValue *getintfromhash (Table *t, lua_Integer key) { - Node *n = hashint(t, key); - lua_assert(!ikeyinarray(t, key)); - for (;;) { /* check whether 'key' is somewhere in the chain */ - if (keyisinteger(n) && keyival(n) == key) - return gval(n); /* that's it */ - else { - int nx = gnext(n); - if (nx == 0) break; - n += nx; - } - } - return &absentkey; -} - - -static int hashkeyisempty (Table *t, lua_Unsigned key) { - const TValue *val = getintfromhash(t, l_castU2S(key)); - return isempty(val); -} - - -static lu_byte finishnodeget (const TValue *val, TValue *res) { - if (!ttisnil(val)) { - setobj(((lua_State*)NULL), res, val); - } - return ttypetag(val); -} - - -lu_byte luaH_getint (Table *t, lua_Integer key, TValue *res) { - unsigned k = ikeyinarray(t, key); - if (k > 0) { - lu_byte tag = *getArrTag(t, k - 1); - if (!tagisempty(tag)) - farr2val(t, k - 1, tag, res); - return tag; - } - else - return finishnodeget(getintfromhash(t, key), res); -} - - -/* -** search function for short strings -*/ -const TValue *luaH_Hgetshortstr (Table *t, TString *key) { - Node *n = hashstr(t, key); - lua_assert(strisshr(key)); - for (;;) { /* check whether 'key' is somewhere in the chain */ - if (keyisshrstr(n) && eqshrstr(keystrval(n), key)) - return gval(n); /* that's it */ - else { - int nx = gnext(n); - if (nx == 0) - return &absentkey; /* not found */ - n += nx; - } - } -} - - -lu_byte luaH_getshortstr (Table *t, TString *key, TValue *res) { - return finishnodeget(luaH_Hgetshortstr(t, key), res); -} - - -static const TValue *Hgetlongstr (Table *t, TString *key) { - TValue ko; - lua_assert(!strisshr(key)); - setsvalue(cast(lua_State *, NULL), &ko, key); - return getgeneric(t, &ko, 0); /* for long strings, use generic case */ -} - - -static const TValue *Hgetstr (Table *t, TString *key) { - if (strisshr(key)) - return luaH_Hgetshortstr(t, key); - else - return Hgetlongstr(t, key); -} - - -lu_byte luaH_getstr (Table *t, TString *key, TValue *res) { - return finishnodeget(Hgetstr(t, key), res); -} - - -/* -** main search function -*/ -lu_byte luaH_get (Table *t, const TValue *key, TValue *res) { - const TValue *slot; - switch (ttypetag(key)) { - case LUA_VSHRSTR: - slot = luaH_Hgetshortstr(t, tsvalue(key)); - break; - case LUA_VNUMINT: - return luaH_getint(t, ivalue(key), res); - case LUA_VNIL: - slot = &absentkey; - break; - case LUA_VNUMFLT: { - lua_Integer k; - if (luaV_flttointeger(fltvalue(key), &k, F2Ieq)) /* integral index? */ - return luaH_getint(t, k, res); /* use specialized version */ - /* else... */ - } /* FALLTHROUGH */ - default: - slot = getgeneric(t, key, 0); - break; - } - return finishnodeget(slot, res); -} - - -/* -** When a 'pset' cannot be completed, this function returns an encoding -** of its result, to be used by 'luaH_finishset'. -*/ -static int retpsetcode (Table *t, const TValue *slot) { - if (isabstkey(slot)) - return HNOTFOUND; /* no slot with that key */ - else /* return node encoded */ - return cast_int((cast(Node*, slot) - t->node)) + HFIRSTNODE; -} - - -static int finishnodeset (Table *t, const TValue *slot, TValue *val) { - if (!ttisnil(slot)) { - setobj(((lua_State*)NULL), cast(TValue*, slot), val); - return HOK; /* success */ - } - else - return retpsetcode(t, slot); -} - - -static int rawfinishnodeset (const TValue *slot, TValue *val) { - if (isabstkey(slot)) - return 0; /* no slot with that key */ - else { - setobj(((lua_State*)NULL), cast(TValue*, slot), val); - return 1; /* success */ - } -} - - -int luaH_psetint (Table *t, lua_Integer key, TValue *val) { - lua_assert(!ikeyinarray(t, key)); - return finishnodeset(t, getintfromhash(t, key), val); -} - - -static int psetint (Table *t, lua_Integer key, TValue *val) { - int hres; - luaH_fastseti(t, key, val, hres); - return hres; -} - - -/* -** This function could be just this: -** return finishnodeset(t, luaH_Hgetshortstr(t, key), val); -** However, it optimizes the common case created by constructors (e.g., -** {x=1, y=2}), which creates a key in a table that has no metatable, -** it is not old/black, and it already has space for the key. -*/ - -int luaH_psetshortstr (Table *t, TString *key, TValue *val) { - const TValue *slot = luaH_Hgetshortstr(t, key); - if (!ttisnil(slot)) { /* key already has a value? (all too common) */ - setobj(((lua_State*)NULL), cast(TValue*, slot), val); /* update it */ - return HOK; /* done */ - } - else if (checknoTM(t->metatable, TM_NEWINDEX)) { /* no metamethod? */ - if (ttisnil(val)) /* new value is nil? */ - return HOK; /* done (value is already nil/absent) */ - if (isabstkey(slot) && /* key is absent? */ - !(isblack(t) && iswhite(key))) { /* and don't need barrier? */ - TValue tk; /* key as a TValue */ - setsvalue(cast(lua_State *, NULL), &tk, key); - if (insertkey(t, &tk, val)) { /* insert key, if there is space */ - invalidateTMcache(t); - return HOK; - } - } - } - /* Else, either table has new-index metamethod, or it needs barrier, - or it needs to rehash for the new key. In any of these cases, the - operation cannot be completed here. Return a code for the caller. */ - return retpsetcode(t, slot); -} - - -int luaH_psetstr (Table *t, TString *key, TValue *val) { - if (strisshr(key)) - return luaH_psetshortstr(t, key, val); - else - return finishnodeset(t, Hgetlongstr(t, key), val); -} - - -int luaH_pset (Table *t, const TValue *key, TValue *val) { - switch (ttypetag(key)) { - case LUA_VSHRSTR: return luaH_psetshortstr(t, tsvalue(key), val); - case LUA_VNUMINT: return psetint(t, ivalue(key), val); - case LUA_VNIL: return HNOTFOUND; - case LUA_VNUMFLT: { - lua_Integer k; - if (luaV_flttointeger(fltvalue(key), &k, F2Ieq)) /* integral index? */ - return psetint(t, k, val); /* use specialized version */ - /* else... */ - } /* FALLTHROUGH */ - default: - return finishnodeset(t, getgeneric(t, key, 0), val); - } -} - -/* -** Finish a raw "set table" operation, where 'hres' encodes where the -** value should have been (the result of a previous 'pset' operation). -** Beware: when using this function the caller probably need to check a -** GC barrier and invalidate the TM cache. -*/ -void luaH_finishset (lua_State *L, Table *t, const TValue *key, - TValue *value, int hres) { - lua_assert(hres != HOK); - if (hres == HNOTFOUND) { - TValue aux; - const TValue *actk = key; /* actual key to insert */ - if (l_unlikely(ttisnil(key))) - luaG_runerror(L, "table index is nil"); - else if (ttisfloat(key)) { - lua_Number f = fltvalue(key); - lua_Integer k; - if (luaV_flttointeger(f, &k, F2Ieq)) { /* is key equal to an integer? */ - setivalue(&aux, k); - actk = &aux; /* use the integer as the key */ - } - else if (l_unlikely(luai_numisnan(f))) - luaG_runerror(L, "table index is NaN"); - } - else if (isextstr(key)) { /* external string? */ - /* If string is short, must internalize it to be used as table key */ - TString *ts = luaS_normstr(L, tsvalue(key)); - setsvalue2s(L, L->top.p++, ts); /* anchor 'ts' (EXTRA_STACK) */ - luaH_newkey(L, t, s2v(L->top.p - 1), value); - L->top.p--; - return; - } - luaH_newkey(L, t, actk, value); - } - else if (hres > 0) { /* regular Node? */ - setobj2t(L, gval(gnode(t, hres - HFIRSTNODE)), value); - } - else { /* array entry */ - hres = ~hres; /* real index */ - obj2arr(t, cast_uint(hres), value); - } -} - - -/* -** beware: when using this function you probably need to check a GC -** barrier and invalidate the TM cache. -*/ -void luaH_set (lua_State *L, Table *t, const TValue *key, TValue *value) { - int hres = luaH_pset(t, key, value); - if (hres != HOK) - luaH_finishset(L, t, key, value, hres); -} - - -/* -** Ditto for a GC barrier. (No need to invalidate the TM cache, as -** integers cannot be keys to metamethods.) -*/ -void luaH_setint (lua_State *L, Table *t, lua_Integer key, TValue *value) { - unsigned ik = ikeyinarray(t, key); - if (ik > 0) - obj2arr(t, ik - 1, value); - else { - int ok = rawfinishnodeset(getintfromhash(t, key), value); - if (!ok) { - TValue k; - setivalue(&k, key); - luaH_newkey(L, t, &k, value); - } - } -} - - -/* -** Try to find a boundary in the hash part of table 't'. From the -** caller, we know that 'asize + 1' is present. We want to find a larger -** key that is absent from the table, so that we can do a binary search -** between the two keys to find a boundary. We keep doubling 'j' until -** we get an absent index. If the doubling would overflow, we try -** LUA_MAXINTEGER. If it is absent, we are ready for the binary search. -** ('j', being max integer, is larger or equal to 'i', but it cannot be -** equal because it is absent while 'i' is present.) Otherwise, 'j' is a -** boundary. ('j + 1' cannot be a present integer key because it is not -** a valid integer in Lua.) -** About 'rnd': If we used a fixed algorithm, a bad actor could fill -** a table with only the keys that would be probed, in such a way that -** a small table could result in a huge length. To avoid that, we use -** the state's seed as a source of randomness. For the first probe, -** we "randomly double" 'i' by adding to it a random number roughly its -** width. -*/ -static lua_Unsigned hash_search (lua_State *L, Table *t, unsigned asize) { - lua_Unsigned i = asize + 1; /* caller ensures t[i] is present */ - unsigned rnd = G(L)->seed; - int n = (asize > 0) ? luaO_ceillog2(asize) : 0; /* width of 'asize' */ - unsigned mask = (1u << n) - 1; /* 11...111 with the width of 'asize' */ - unsigned incr = (rnd & mask) + 1; /* first increment (at least 1) */ - lua_Unsigned j = (incr <= l_castS2U(LUA_MAXINTEGER) - i) ? i + incr : i + 1; - rnd >>= n; /* used 'n' bits from 'rnd' */ - while (!hashkeyisempty(t, j)) { /* repeat until an absent t[j] */ - i = j; /* 'i' is a present index */ - if (j <= l_castS2U(LUA_MAXINTEGER)/2 - 1) { - j = j*2 + (rnd & 1); /* try again with 2j or 2j+1 */ - rnd >>= 1; - } - else { - j = LUA_MAXINTEGER; - if (hashkeyisempty(t, j)) /* t[j] not present? */ - break; /* 'j' now is an absent index */ - else /* weird case */ - return j; /* well, max integer is a boundary... */ - } - } - /* i < j && t[i] present && t[j] absent */ - while (j - i > 1u) { /* do a binary search between them */ - lua_Unsigned m = (i + j) / 2; - if (hashkeyisempty(t, m)) j = m; - else i = m; - } - return i; -} - - -static unsigned int binsearch (Table *array, unsigned int i, unsigned int j) { - lua_assert(i <= j); - while (j - i > 1u) { /* binary search */ - unsigned int m = (i + j) / 2; - if (arraykeyisempty(array, m)) j = m; - else i = m; - } - return i; -} - - -/* return a border, saving it as a hint for next call */ -static lua_Unsigned newhint (Table *t, unsigned hint) { - lua_assert(hint <= t->asize); - *lenhint(t) = hint; - return hint; -} - - -/* -** Try to find a border in table 't'. (A 'border' is an integer index -** such that t[i] is present and t[i+1] is absent, or 0 if t[1] is absent, -** or 'maxinteger' if t[maxinteger] is present.) -** If there is an array part, try to find a border there. First try -** to find it in the vicinity of the previous result (hint), to handle -** cases like 't[#t + 1] = val' or 't[#t] = nil', that move the border -** by one entry. Otherwise, do a binary search to find the border. -** If there is no array part, or its last element is non empty, the -** border may be in the hash part. -*/ -lua_Unsigned luaH_getn (lua_State *L, Table *t) { - unsigned asize = t->asize; - if (asize > 0) { /* is there an array part? */ - const unsigned maxvicinity = 4; - unsigned limit = *lenhint(t); /* start with the hint */ - if (limit == 0) - limit = 1; /* make limit a valid index in the array */ - if (arraykeyisempty(t, limit)) { /* t[limit] empty? */ - /* there must be a border before 'limit' */ - unsigned i; - /* look for a border in the vicinity of the hint */ - for (i = 0; i < maxvicinity && limit > 1; i++) { - limit--; - if (!arraykeyisempty(t, limit)) - return newhint(t, limit); /* 'limit' is a border */ - } - /* t[limit] still empty; search for a border in [0, limit) */ - return newhint(t, binsearch(t, 0, limit)); - } - else { /* 'limit' is present in table; look for a border after it */ - unsigned i; - /* look for a border in the vicinity of the hint */ - for (i = 0; i < maxvicinity && limit < asize; i++) { - limit++; - if (arraykeyisempty(t, limit)) - return newhint(t, limit - 1); /* 'limit - 1' is a border */ - } - if (arraykeyisempty(t, asize)) { /* last element empty? */ - /* t[limit] not empty; search for a border in [limit, asize) */ - return newhint(t, binsearch(t, limit, asize)); - } - } - /* last element non empty; set a hint to speed up finding that again */ - /* (keys in the hash part cannot be hints) */ - *lenhint(t) = asize; - } - /* no array part or t[asize] is not empty; check the hash part */ - lua_assert(asize == 0 || !arraykeyisempty(t, asize)); - if (isdummy(t) || hashkeyisempty(t, asize + 1)) - return asize; /* 'asize + 1' is empty */ - else /* 'asize + 1' is also non empty */ - return hash_search(L, t, asize); -} - - - -#if defined(LUA_DEBUG) - -/* export this function for the test library */ - -Node *luaH_mainposition (const Table *t, const TValue *key) { - return mainpositionTV(t, key); -} - -#endif diff --git a/lib/lua/ltable.h b/lib/lua/ltable.h deleted file mode 100644 index f3b7bc7..0000000 --- a/lib/lua/ltable.h +++ /dev/null @@ -1,184 +0,0 @@ -/* -** $Id: ltable.h $ -** Lua tables (hash) -** See Copyright Notice in lua.h -*/ - -#ifndef ltable_h -#define ltable_h - -#include "lobject.h" - - -#define gnode(t,i) (&(t)->node[i]) -#define gval(n) (&(n)->i_val) -#define gnext(n) ((n)->u.next) - - -/* -** Clear all bits of fast-access metamethods, which means that the table -** may have any of these metamethods. (First access that fails after the -** clearing will set the bit again.) -*/ -#define invalidateTMcache(t) ((t)->flags &= cast_byte(~maskflags)) - - -/* -** Bit BITDUMMY set in 'flags' means the table is using the dummy node -** for its hash part. -*/ - -#define BITDUMMY (1 << 6) -#define NOTBITDUMMY cast_byte(~BITDUMMY) -#define isdummy(t) ((t)->flags & BITDUMMY) - -#define setnodummy(t) ((t)->flags &= NOTBITDUMMY) -#define setdummy(t) ((t)->flags |= BITDUMMY) - - - -/* allocated size for hash nodes */ -#define allocsizenode(t) (isdummy(t) ? 0 : sizenode(t)) - - -/* returns the Node, given the value of a table entry */ -#define nodefromval(v) cast(Node *, (v)) - - - -#define luaH_fastgeti(t,k,res,tag) \ - { Table *h = t; lua_Unsigned u = l_castS2U(k) - 1u; \ - if ((u < h->asize)) { \ - tag = *getArrTag(h, u); \ - if (!tagisempty(tag)) { farr2val(h, u, tag, res); }} \ - else { tag = luaH_getint(h, (k), res); }} - - -#define luaH_fastseti(t,k,val,hres) \ - { Table *h = t; lua_Unsigned u = l_castS2U(k) - 1u; \ - if ((u < h->asize)) { \ - lu_byte *tag = getArrTag(h, u); \ - if (checknoTM(h->metatable, TM_NEWINDEX) || !tagisempty(*tag)) \ - { fval2arr(h, u, tag, val); hres = HOK; } \ - else hres = ~cast_int(u); } \ - else { hres = luaH_psetint(h, k, val); }} - - -/* results from pset */ -#define HOK 0 -#define HNOTFOUND 1 -#define HNOTATABLE 2 -#define HFIRSTNODE 3 - -/* -** 'luaH_get*' operations set 'res', unless the value is absent, and -** return the tag of the result. -** The 'luaH_pset*' (pre-set) operations set the given value and return -** HOK, unless the original value is absent. In that case, if the key -** is really absent, they return HNOTFOUND. Otherwise, if there is a -** slot with that key but with no value, 'luaH_pset*' return an encoding -** of where the key is (usually called 'hres'). (pset cannot set that -** value because there might be a metamethod.) If the slot is in the -** hash part, the encoding is (HFIRSTNODE + hash index); if the slot is -** in the array part, the encoding is (~array index), a negative value. -** The value HNOTATABLE is used by the fast macros to signal that the -** value being indexed is not a table. -** (The size for the array part is limited by the maximum power of two -** that fits in an unsigned integer; that is INT_MAX+1. So, the C-index -** ranges from 0, which encodes to -1, to INT_MAX, which encodes to -** INT_MIN. The size of the hash part is limited by the maximum power of -** two that fits in a signed integer; that is (INT_MAX+1)/2. So, it is -** safe to add HFIRSTNODE to any index there.) -*/ - - -/* -** The array part of a table is represented by an inverted array of -** values followed by an array of tags, to avoid wasting space with -** padding. In between them there is an unsigned int, explained later. -** The 'array' pointer points between the two arrays, so that values are -** indexed with negative indices and tags with non-negative indices. - - Values Tags - -------------------------------------------------------- - ... | Value 1 | Value 0 |unsigned|0|1|... - -------------------------------------------------------- - ^ t->array - -** All accesses to 't->array' should be through the macros 'getArrTag' -** and 'getArrVal'. -*/ - -/* Computes the address of the tag for the abstract C-index 'k' */ -#define getArrTag(t,k) (cast(lu_byte*, (t)->array) + sizeof(unsigned) + (k)) - -/* Computes the address of the value for the abstract C-index 'k' */ -#define getArrVal(t,k) ((t)->array - 1 - (k)) - - -/* -** The unsigned between the two arrays is used as a hint for #t; -** see luaH_getn. It is stored there to avoid wasting space in -** the structure Table for tables with no array part. -*/ -#define lenhint(t) cast(unsigned*, (t)->array) - - -/* -** Move TValues to/from arrays, using C indices -*/ -#define arr2obj(h,k,val) \ - ((val)->tt_ = *getArrTag(h,(k)), (val)->value_ = *getArrVal(h,(k))) - -#define obj2arr(h,k,val) \ - (*getArrTag(h,(k)) = (val)->tt_, *getArrVal(h,(k)) = (val)->value_) - - -/* -** Often, we need to check the tag of a value before moving it. The -** following macros also move TValues to/from arrays, but receive the -** precomputed tag value or address as an extra argument. -*/ -#define farr2val(h,k,tag,res) \ - ((res)->tt_ = tag, (res)->value_ = *getArrVal(h,(k))) - -#define fval2arr(h,k,tag,val) \ - (*tag = (val)->tt_, *getArrVal(h,(k)) = (val)->value_) - - -LUAI_FUNC lu_byte luaH_get (Table *t, const TValue *key, TValue *res); -LUAI_FUNC lu_byte luaH_getshortstr (Table *t, TString *key, TValue *res); -LUAI_FUNC lu_byte luaH_getstr (Table *t, TString *key, TValue *res); -LUAI_FUNC lu_byte luaH_getint (Table *t, lua_Integer key, TValue *res); - -/* Special get for metamethods */ -LUAI_FUNC const TValue *luaH_Hgetshortstr (Table *t, TString *key); - -LUAI_FUNC int luaH_psetint (Table *t, lua_Integer key, TValue *val); -LUAI_FUNC int luaH_psetshortstr (Table *t, TString *key, TValue *val); -LUAI_FUNC int luaH_psetstr (Table *t, TString *key, TValue *val); -LUAI_FUNC int luaH_pset (Table *t, const TValue *key, TValue *val); - -LUAI_FUNC void luaH_setint (lua_State *L, Table *t, lua_Integer key, - TValue *value); -LUAI_FUNC void luaH_set (lua_State *L, Table *t, const TValue *key, - TValue *value); - -LUAI_FUNC void luaH_finishset (lua_State *L, Table *t, const TValue *key, - TValue *value, int hres); -LUAI_FUNC Table *luaH_new (lua_State *L); -LUAI_FUNC void luaH_resize (lua_State *L, Table *t, unsigned nasize, - unsigned nhsize); -LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, unsigned nasize); -LUAI_FUNC lu_mem luaH_size (Table *t); -LUAI_FUNC void luaH_free (lua_State *L, Table *t); -LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key); -LUAI_FUNC lua_Unsigned luaH_getn (lua_State *L, Table *t); - - -#if defined(LUA_DEBUG) -LUAI_FUNC Node *luaH_mainposition (const Table *t, const TValue *key); -#endif - - -#endif diff --git a/lib/lua/ltablib.c b/lib/lua/ltablib.c deleted file mode 100644 index 15c3c09..0000000 --- a/lib/lua/ltablib.c +++ /dev/null @@ -1,429 +0,0 @@ -/* -** $Id: ltablib.c $ -** Library for Table Manipulation -** See Copyright Notice in lua.h -*/ - -#define ltablib_c -#define LUA_LIB - -#include "lprefix.h" - - -#include -#include -#include - -#include "lua.h" - -#include "lauxlib.h" -#include "lualib.h" -#include "llimits.h" - - -/* -** Operations that an object must define to mimic a table -** (some functions only need some of them) -*/ -#define TAB_R 1 /* read */ -#define TAB_W 2 /* write */ -#define TAB_L 4 /* length */ -#define TAB_RW (TAB_R | TAB_W) /* read/write */ - - -#define aux_getn(L,n,w) (checktab(L, n, (w) | TAB_L), luaL_len(L, n)) - - -static int checkfield (lua_State *L, const char *key, int n) { - lua_pushstring(L, key); - return (lua_rawget(L, -n) != LUA_TNIL); -} - - -/* -** Check that 'arg' either is a table or can behave like one (that is, -** has a metatable with the required metamethods). -*/ -static void checktab (lua_State *L, int arg, int what) { - int tp = lua_type(L, arg); - if (tp != LUA_TTABLE) { /* is it not a table? */ - int n = 1; /* number of elements to pop */ - if (lua_getmetatable(L, arg) && /* must have metatable */ - (!(what & TAB_R) || checkfield(L, "__index", ++n)) && - (!(what & TAB_W) || checkfield(L, "__newindex", ++n)) && - (!(what & TAB_L) || /* strings don't need '__len' to have a length */ - tp == LUA_TSTRING || checkfield(L, "__len", ++n))) { - lua_pop(L, n); /* pop metatable and tested metamethods */ - } - else - luaL_checktype(L, arg, LUA_TTABLE); /* force an error */ - } -} - - -static int tcreate (lua_State *L) { - lua_Unsigned sizeseq = (lua_Unsigned)luaL_checkinteger(L, 1); - lua_Unsigned sizerest = (lua_Unsigned)luaL_optinteger(L, 2, 0); - luaL_argcheck(L, sizeseq <= cast_uint(INT_MAX), 1, "out of range"); - luaL_argcheck(L, sizerest <= cast_uint(INT_MAX), 2, "out of range"); - lua_createtable(L, cast_int(sizeseq), cast_int(sizerest)); - return 1; -} - - -static int tinsert (lua_State *L) { - lua_Integer pos; /* where to insert new element */ - lua_Integer e = aux_getn(L, 1, TAB_RW); - e = luaL_intop(+, e, 1); /* first empty element */ - switch (lua_gettop(L)) { - case 2: { /* called with only 2 arguments */ - pos = e; /* insert new element at the end */ - break; - } - case 3: { - lua_Integer i; - pos = luaL_checkinteger(L, 2); /* 2nd argument is the position */ - /* check whether 'pos' is in [1, e] */ - luaL_argcheck(L, (lua_Unsigned)pos - 1u < (lua_Unsigned)e, 2, - "position out of bounds"); - for (i = e; i > pos; i--) { /* move up elements */ - lua_geti(L, 1, i - 1); - lua_seti(L, 1, i); /* t[i] = t[i - 1] */ - } - break; - } - default: { - return luaL_error(L, "wrong number of arguments to 'insert'"); - } - } - lua_seti(L, 1, pos); /* t[pos] = v */ - return 0; -} - - -static int tremove (lua_State *L) { - lua_Integer size = aux_getn(L, 1, TAB_RW); - lua_Integer pos = luaL_optinteger(L, 2, size); - if (pos != size) /* validate 'pos' if given */ - /* check whether 'pos' is in [1, size + 1] */ - luaL_argcheck(L, (lua_Unsigned)pos - 1u <= (lua_Unsigned)size, 2, - "position out of bounds"); - lua_geti(L, 1, pos); /* result = t[pos] */ - for ( ; pos < size; pos++) { - lua_geti(L, 1, pos + 1); - lua_seti(L, 1, pos); /* t[pos] = t[pos + 1] */ - } - lua_pushnil(L); - lua_seti(L, 1, pos); /* remove entry t[pos] */ - return 1; -} - - -/* -** Copy elements (1[f], ..., 1[e]) into (tt[t], tt[t+1], ...). Whenever -** possible, copy in increasing order, which is better for rehashing. -** "possible" means destination after original range, or smaller -** than origin, or copying to another table. -*/ -static int tmove (lua_State *L) { - lua_Integer f = luaL_checkinteger(L, 2); - lua_Integer e = luaL_checkinteger(L, 3); - lua_Integer t = luaL_checkinteger(L, 4); - int tt = !lua_isnoneornil(L, 5) ? 5 : 1; /* destination table */ - checktab(L, 1, TAB_R); - checktab(L, tt, TAB_W); - if (e >= f) { /* otherwise, nothing to move */ - lua_Integer n, i; - luaL_argcheck(L, f > 0 || e < LUA_MAXINTEGER + f, 3, - "too many elements to move"); - n = e - f + 1; /* number of elements to move */ - luaL_argcheck(L, t <= LUA_MAXINTEGER - n + 1, 4, - "destination wrap around"); - if (t > e || t <= f || (tt != 1 && !lua_compare(L, 1, tt, LUA_OPEQ))) { - for (i = 0; i < n; i++) { - lua_geti(L, 1, f + i); - lua_seti(L, tt, t + i); - } - } - else { - for (i = n - 1; i >= 0; i--) { - lua_geti(L, 1, f + i); - lua_seti(L, tt, t + i); - } - } - } - lua_pushvalue(L, tt); /* return destination table */ - return 1; -} - - -static void addfield (lua_State *L, luaL_Buffer *b, lua_Integer i) { - lua_geti(L, 1, i); - if (l_unlikely(!lua_isstring(L, -1))) - luaL_error(L, "invalid value (%s) at index %I in table for 'concat'", - luaL_typename(L, -1), (LUAI_UACINT)i); - luaL_addvalue(b); -} - - -static int tconcat (lua_State *L) { - luaL_Buffer b; - lua_Integer last = aux_getn(L, 1, TAB_R); - size_t lsep; - const char *sep = luaL_optlstring(L, 2, "", &lsep); - lua_Integer i = luaL_optinteger(L, 3, 1); - last = luaL_optinteger(L, 4, last); - luaL_buffinit(L, &b); - for (; i < last; i++) { - addfield(L, &b, i); - luaL_addlstring(&b, sep, lsep); - } - if (i == last) /* add last value (if interval was not empty) */ - addfield(L, &b, i); - luaL_pushresult(&b); - return 1; -} - - -/* -** {====================================================== -** Pack/unpack -** ======================================================= -*/ - -static int tpack (lua_State *L) { - int i; - int n = lua_gettop(L); /* number of elements to pack */ - lua_createtable(L, n, 1); /* create result table */ - lua_insert(L, 1); /* put it at index 1 */ - for (i = n; i >= 1; i--) /* assign elements */ - lua_seti(L, 1, i); - lua_pushinteger(L, n); - lua_setfield(L, 1, "n"); /* t.n = number of elements */ - return 1; /* return table */ -} - - -static int tunpack (lua_State *L) { - lua_Unsigned n; - lua_Integer len = aux_getn(L, 1, TAB_R); - lua_Integer i = luaL_optinteger(L, 2, 1); - lua_Integer e = luaL_opt(L, luaL_checkinteger, 3, len); - if (i > e) return 0; /* empty range */ - n = l_castS2U(e) - l_castS2U(i); /* number of elements minus 1 */ - if (l_unlikely(n >= (unsigned int)INT_MAX || - !lua_checkstack(L, (int)(++n)))) - return luaL_error(L, "too many results to unpack"); - for (; i < e; i++) { /* push arg[i..e - 1] (to avoid overflows) */ - lua_geti(L, 1, i); - } - lua_geti(L, 1, e); /* push last element */ - return (int)n; -} - -/* }====================================================== */ - - - -/* -** {====================================================== -** Quicksort -** (based on 'Algorithms in MODULA-3', Robert Sedgewick; -** Addison-Wesley, 1993.) -** ======================================================= -*/ - - -/* -** Type for array indices. These indices are always limited by INT_MAX, -** so it is safe to cast them to lua_Integer even for Lua 32 bits. -*/ -typedef unsigned int IdxT; - - -/* Versions of lua_seti/lua_geti specialized for IdxT */ -#define geti(L,idt,idx) lua_geti(L, idt, l_castU2S(idx)) -#define seti(L,idt,idx) lua_seti(L, idt, l_castU2S(idx)) - - -/* -** Produce a "random" 'unsigned int' to randomize pivot choice. This -** macro is used only when 'sort' detects a big imbalance in the result -** of a partition. (If you don't want/need this "randomness", ~0 is a -** good choice.) -*/ -#if !defined(l_randomizePivot) -#define l_randomizePivot(L) luaL_makeseed(L) -#endif /* } */ - - -/* arrays larger than 'RANLIMIT' may use randomized pivots */ -#define RANLIMIT 100u - - -static void set2 (lua_State *L, IdxT i, IdxT j) { - seti(L, 1, i); - seti(L, 1, j); -} - - -/* -** Return true iff value at stack index 'a' is less than the value at -** index 'b' (according to the order of the sort). -*/ -static int sort_comp (lua_State *L, int a, int b) { - if (lua_isnil(L, 2)) /* no function? */ - return lua_compare(L, a, b, LUA_OPLT); /* a < b */ - else { /* function */ - int res; - lua_pushvalue(L, 2); /* push function */ - lua_pushvalue(L, a-1); /* -1 to compensate function */ - lua_pushvalue(L, b-2); /* -2 to compensate function and 'a' */ - lua_call(L, 2, 1); /* call function */ - res = lua_toboolean(L, -1); /* get result */ - lua_pop(L, 1); /* pop result */ - return res; - } -} - - -/* -** Does the partition: Pivot P is at the top of the stack. -** precondition: a[lo] <= P == a[up-1] <= a[up], -** so it only needs to do the partition from lo + 1 to up - 2. -** Pos-condition: a[lo .. i - 1] <= a[i] == P <= a[i + 1 .. up] -** returns 'i'. -*/ -static IdxT partition (lua_State *L, IdxT lo, IdxT up) { - IdxT i = lo; /* will be incremented before first use */ - IdxT j = up - 1; /* will be decremented before first use */ - /* loop invariant: a[lo .. i] <= P <= a[j .. up] */ - for (;;) { - /* next loop: repeat ++i while a[i] < P */ - while ((void)geti(L, 1, ++i), sort_comp(L, -1, -2)) { - if (l_unlikely(i == up - 1)) /* a[up - 1] < P == a[up - 1] */ - luaL_error(L, "invalid order function for sorting"); - lua_pop(L, 1); /* remove a[i] */ - } - /* after the loop, a[i] >= P and a[lo .. i - 1] < P (a) */ - /* next loop: repeat --j while P < a[j] */ - while ((void)geti(L, 1, --j), sort_comp(L, -3, -1)) { - if (l_unlikely(j < i)) /* j <= i - 1 and a[j] > P, contradicts (a) */ - luaL_error(L, "invalid order function for sorting"); - lua_pop(L, 1); /* remove a[j] */ - } - /* after the loop, a[j] <= P and a[j + 1 .. up] >= P */ - if (j < i) { /* no elements out of place? */ - /* a[lo .. i - 1] <= P <= a[j + 1 .. i .. up] */ - lua_pop(L, 1); /* pop a[j] */ - /* swap pivot (a[up - 1]) with a[i] to satisfy pos-condition */ - set2(L, up - 1, i); - return i; - } - /* otherwise, swap a[i] - a[j] to restore invariant and repeat */ - set2(L, i, j); - } -} - - -/* -** Choose an element in the middle (2nd-3th quarters) of [lo,up] -** "randomized" by 'rnd' -*/ -static IdxT choosePivot (IdxT lo, IdxT up, unsigned int rnd) { - IdxT r4 = (up - lo) / 4; /* range/4 */ - IdxT p = (rnd ^ lo ^ up) % (r4 * 2) + (lo + r4); - lua_assert(lo + r4 <= p && p <= up - r4); - return p; -} - - -/* -** Quicksort algorithm (recursive function) -*/ -static void auxsort (lua_State *L, IdxT lo, IdxT up, unsigned rnd) { - while (lo < up) { /* loop for tail recursion */ - IdxT p; /* Pivot index */ - IdxT n; /* to be used later */ - /* sort elements 'lo', 'p', and 'up' */ - geti(L, 1, lo); - geti(L, 1, up); - if (sort_comp(L, -1, -2)) /* a[up] < a[lo]? */ - set2(L, lo, up); /* swap a[lo] - a[up] */ - else - lua_pop(L, 2); /* remove both values */ - if (up - lo == 1) /* only 2 elements? */ - return; /* already sorted */ - if (up - lo < RANLIMIT || rnd == 0) /* small interval or no randomize? */ - p = (lo + up)/2; /* middle element is a good pivot */ - else /* for larger intervals, it is worth a random pivot */ - p = choosePivot(lo, up, rnd); - geti(L, 1, p); - geti(L, 1, lo); - if (sort_comp(L, -2, -1)) /* a[p] < a[lo]? */ - set2(L, p, lo); /* swap a[p] - a[lo] */ - else { - lua_pop(L, 1); /* remove a[lo] */ - geti(L, 1, up); - if (sort_comp(L, -1, -2)) /* a[up] < a[p]? */ - set2(L, p, up); /* swap a[up] - a[p] */ - else - lua_pop(L, 2); - } - if (up - lo == 2) /* only 3 elements? */ - return; /* already sorted */ - geti(L, 1, p); /* get middle element (Pivot) */ - lua_pushvalue(L, -1); /* push Pivot */ - geti(L, 1, up - 1); /* push a[up - 1] */ - set2(L, p, up - 1); /* swap Pivot (a[p]) with a[up - 1] */ - p = partition(L, lo, up); - /* a[lo .. p - 1] <= a[p] == P <= a[p + 1 .. up] */ - if (p - lo < up - p) { /* lower interval is smaller? */ - auxsort(L, lo, p - 1, rnd); /* call recursively for lower interval */ - n = p - lo; /* size of smaller interval */ - lo = p + 1; /* tail call for [p + 1 .. up] (upper interval) */ - } - else { - auxsort(L, p + 1, up, rnd); /* call recursively for upper interval */ - n = up - p; /* size of smaller interval */ - up = p - 1; /* tail call for [lo .. p - 1] (lower interval) */ - } - if ((up - lo) / 128 > n) /* partition too imbalanced? */ - rnd = l_randomizePivot(L); /* try a new randomization */ - } /* tail call auxsort(L, lo, up, rnd) */ -} - - -static int sort (lua_State *L) { - lua_Integer n = aux_getn(L, 1, TAB_RW); - if (n > 1) { /* non-trivial interval? */ - luaL_argcheck(L, n < INT_MAX, 1, "array too big"); - if (!lua_isnoneornil(L, 2)) /* is there a 2nd argument? */ - luaL_checktype(L, 2, LUA_TFUNCTION); /* must be a function */ - lua_settop(L, 2); /* make sure there are two arguments */ - auxsort(L, 1, (IdxT)n, 0); - } - return 0; -} - -/* }====================================================== */ - - -static const luaL_Reg tab_funcs[] = { - {"concat", tconcat}, - {"create", tcreate}, - {"insert", tinsert}, - {"pack", tpack}, - {"unpack", tunpack}, - {"remove", tremove}, - {"move", tmove}, - {"sort", sort}, - {NULL, NULL} -}; - - -LUAMOD_API int luaopen_table (lua_State *L) { - luaL_newlib(L, tab_funcs); - return 1; -} - diff --git a/lib/lua/ltm.c b/lib/lua/ltm.c deleted file mode 100644 index cfe90e3..0000000 --- a/lib/lua/ltm.c +++ /dev/null @@ -1,364 +0,0 @@ -/* -** $Id: ltm.c $ -** Tag methods -** See Copyright Notice in lua.h -*/ - -#define ltm_c -#define LUA_CORE - -#include "lprefix.h" - - -#include - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lgc.h" -#include "lobject.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" -#include "lvm.h" - - -static const char udatatypename[] = "userdata"; - -LUAI_DDEF const char *const luaT_typenames_[LUA_TOTALTYPES] = { - "no value", - "nil", "boolean", udatatypename, "number", - "string", "table", "function", udatatypename, "thread", - "upvalue", "proto" /* these last cases are used for tests only */ -}; - - -void luaT_init (lua_State *L) { - static const char *const luaT_eventname[] = { /* ORDER TM */ - "__index", "__newindex", - "__gc", "__mode", "__len", "__eq", - "__add", "__sub", "__mul", "__mod", "__pow", - "__div", "__idiv", - "__band", "__bor", "__bxor", "__shl", "__shr", - "__unm", "__bnot", "__lt", "__le", - "__concat", "__call", "__close" - }; - int i; - for (i=0; itmname[i] = luaS_new(L, luaT_eventname[i]); - luaC_fix(L, obj2gco(G(L)->tmname[i])); /* never collect these names */ - } -} - - -/* -** function to be used with macro "fasttm": optimized for absence of -** tag methods -*/ -const TValue *luaT_gettm (Table *events, TMS event, TString *ename) { - const TValue *tm = luaH_Hgetshortstr(events, ename); - lua_assert(event <= TM_EQ); - if (notm(tm)) { /* no tag method? */ - events->flags |= cast_byte(1u<metatable; - break; - case LUA_TUSERDATA: - mt = uvalue(o)->metatable; - break; - default: - mt = G(L)->mt[ttype(o)]; - } - return (mt ? luaH_Hgetshortstr(mt, G(L)->tmname[event]) : &G(L)->nilvalue); -} - - -/* -** Return the name of the type of an object. For tables and userdata -** with metatable, use their '__name' metafield, if present. -*/ -const char *luaT_objtypename (lua_State *L, const TValue *o) { - Table *mt; - if ((ttistable(o) && (mt = hvalue(o)->metatable) != NULL) || - (ttisfulluserdata(o) && (mt = uvalue(o)->metatable) != NULL)) { - const TValue *name = luaH_Hgetshortstr(mt, luaS_new(L, "__name")); - if (ttisstring(name)) /* is '__name' a string? */ - return getstr(tsvalue(name)); /* use it as type name */ - } - return ttypename(ttype(o)); /* else use standard type name */ -} - - -void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1, - const TValue *p2, const TValue *p3) { - StkId func = L->top.p; - setobj2s(L, func, f); /* push function (assume EXTRA_STACK) */ - setobj2s(L, func + 1, p1); /* 1st argument */ - setobj2s(L, func + 2, p2); /* 2nd argument */ - setobj2s(L, func + 3, p3); /* 3rd argument */ - L->top.p = func + 4; - /* metamethod may yield only when called from Lua code */ - if (isLuacode(L->ci)) - luaD_call(L, func, 0); - else - luaD_callnoyield(L, func, 0); -} - - -lu_byte luaT_callTMres (lua_State *L, const TValue *f, const TValue *p1, - const TValue *p2, StkId res) { - ptrdiff_t result = savestack(L, res); - StkId func = L->top.p; - setobj2s(L, func, f); /* push function (assume EXTRA_STACK) */ - setobj2s(L, func + 1, p1); /* 1st argument */ - setobj2s(L, func + 2, p2); /* 2nd argument */ - L->top.p += 3; - /* metamethod may yield only when called from Lua code */ - if (isLuacode(L->ci)) - luaD_call(L, func, 1); - else - luaD_callnoyield(L, func, 1); - res = restorestack(L, result); - setobjs2s(L, res, --L->top.p); /* move result to its place */ - return ttypetag(s2v(res)); /* return tag of the result */ -} - - -static int callbinTM (lua_State *L, const TValue *p1, const TValue *p2, - StkId res, TMS event) { - const TValue *tm = luaT_gettmbyobj(L, p1, event); /* try first operand */ - if (notm(tm)) - tm = luaT_gettmbyobj(L, p2, event); /* try second operand */ - if (notm(tm)) - return -1; /* tag method not found */ - else /* call tag method and return the tag of the result */ - return luaT_callTMres(L, tm, p1, p2, res); -} - - -void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2, - StkId res, TMS event) { - if (l_unlikely(callbinTM(L, p1, p2, res, event) < 0)) { - switch (event) { - case TM_BAND: case TM_BOR: case TM_BXOR: - case TM_SHL: case TM_SHR: case TM_BNOT: { - if (ttisnumber(p1) && ttisnumber(p2)) - luaG_tointerror(L, p1, p2); - else - luaG_opinterror(L, p1, p2, "perform bitwise operation on"); - } - /* calls never return, but to avoid warnings: *//* FALLTHROUGH */ - default: - luaG_opinterror(L, p1, p2, "perform arithmetic on"); - } - } -} - - -/* -** The use of 'p1' after 'callbinTM' is safe because, when a tag -** method is not found, 'callbinTM' cannot change the stack. -*/ -void luaT_tryconcatTM (lua_State *L) { - StkId p1 = L->top.p - 2; /* first argument */ - if (l_unlikely(callbinTM(L, s2v(p1), s2v(p1 + 1), p1, TM_CONCAT) < 0)) - luaG_concaterror(L, s2v(p1), s2v(p1 + 1)); -} - - -void luaT_trybinassocTM (lua_State *L, const TValue *p1, const TValue *p2, - int flip, StkId res, TMS event) { - if (flip) - luaT_trybinTM(L, p2, p1, res, event); - else - luaT_trybinTM(L, p1, p2, res, event); -} - - -void luaT_trybiniTM (lua_State *L, const TValue *p1, lua_Integer i2, - int flip, StkId res, TMS event) { - TValue aux; - setivalue(&aux, i2); - luaT_trybinassocTM(L, p1, &aux, flip, res, event); -} - - -/* -** Calls an order tag method. -*/ -int luaT_callorderTM (lua_State *L, const TValue *p1, const TValue *p2, - TMS event) { - int tag = callbinTM(L, p1, p2, L->top.p, event); /* try original event */ - if (tag >= 0) /* found tag method? */ - return !tagisfalse(tag); - luaG_ordererror(L, p1, p2); /* no metamethod found */ - return 0; /* to avoid warnings */ -} - - -int luaT_callorderiTM (lua_State *L, const TValue *p1, int v2, - int flip, int isfloat, TMS event) { - TValue aux; const TValue *p2; - if (isfloat) { - setfltvalue(&aux, cast_num(v2)); - } - else - setivalue(&aux, v2); - if (flip) { /* arguments were exchanged? */ - p2 = p1; p1 = &aux; /* correct them */ - } - else - p2 = &aux; - return luaT_callorderTM(L, p1, p2, event); -} - - -/* -** Create a vararg table at the top of the stack, with 'n' elements -** starting at 'f'. -*/ -static void createvarargtab (lua_State *L, StkId f, int n) { - int i; - TValue key, value; - Table *t = luaH_new(L); - sethvalue(L, s2v(L->top.p), t); - L->top.p++; - luaH_resize(L, t, cast_uint(n), 1); - setsvalue(L, &key, luaS_new(L, "n")); /* key is "n" */ - setivalue(&value, n); /* value is n */ - /* No need to anchor the key: Due to the resize, the next operation - cannot trigger a garbage collection */ - luaH_set(L, t, &key, &value); /* t.n = n */ - for (i = 0; i < n; i++) - luaH_setint(L, t, i + 1, s2v(f + i)); - luaC_checkGC(L); -} - - -/* -** initial stack: func arg1 ... argn extra1 ... -** ^ ci->func ^ L->top -** final stack: func nil ... nil extra1 ... func arg1 ... argn -** ^ ci->func -*/ -static void buildhiddenargs (lua_State *L, CallInfo *ci, const Proto *p, - int totalargs, int nfixparams, int nextra) { - int i; - ci->u.l.nextraargs = nextra; - luaD_checkstack(L, p->maxstacksize + 1); - /* copy function to the top of the stack, after extra arguments */ - setobjs2s(L, L->top.p++, ci->func.p); - /* move fixed parameters to after the copied function */ - for (i = 1; i <= nfixparams; i++) { - setobjs2s(L, L->top.p++, ci->func.p + i); - setnilvalue2s(ci->func.p + i); /* erase original parameter (for GC) */ - } - ci->func.p += totalargs + 1; /* 'func' now lives after hidden arguments */ - ci->top.p += totalargs + 1; -} - - -void luaT_adjustvarargs (lua_State *L, CallInfo *ci, const Proto *p) { - int totalargs = cast_int(L->top.p - ci->func.p) - 1; - int nfixparams = p->numparams; - int nextra = totalargs - nfixparams; /* number of extra arguments */ - if (p->flag & PF_VATAB) { /* does it need a vararg table? */ - lua_assert(!(p->flag & PF_VAHID)); - createvarargtab(L, ci->func.p + nfixparams + 1, nextra); - /* move table to proper place (last parameter) */ - setobjs2s(L, ci->func.p + nfixparams + 1, L->top.p - 1); - } - else { /* no table */ - lua_assert(p->flag & PF_VAHID); - buildhiddenargs(L, ci, p, totalargs, nfixparams, nextra); - /* set vararg parameter to nil */ - setnilvalue2s(ci->func.p + nfixparams + 1); - lua_assert(L->top.p <= ci->top.p && ci->top.p <= L->stack_last.p); - } -} - - -void luaT_getvararg (CallInfo *ci, StkId ra, TValue *rc) { - int nextra = ci->u.l.nextraargs; - lua_Integer n; - if (tointegerns(rc, &n)) { /* integral value? */ - if (l_castS2U(n) - 1 < cast_uint(nextra)) { - StkId slot = ci->func.p - nextra + cast_int(n) - 1; - setobjs2s(((lua_State*)NULL), ra, slot); - return; - } - } - else if (ttisstring(rc)) { /* string value? */ - size_t len; - const char *s = getlstr(tsvalue(rc), len); - if (len == 1 && s[0] == 'n') { /* key is "n"? */ - setivalue(s2v(ra), nextra); - return; - } - } - setnilvalue2s(ra); /* else produce nil */ -} - - -/* -** Get the number of extra arguments in a vararg function. If vararg -** table has been optimized away, that number is in the call info. -** Otherwise, get the field 'n' from the vararg table and check that it -** has a proper value (non-negative integer not larger than the stack -** limit). -*/ -static int getnumargs (lua_State *L, CallInfo *ci, Table *h) { - if (h == NULL) /* no vararg table? */ - return ci->u.l.nextraargs; - else { - TValue res; - if (luaH_getshortstr(h, luaS_new(L, "n"), &res) != LUA_VNUMINT || - l_castS2U(ivalue(&res)) > cast_uint(INT_MAX/2)) - luaG_runerror(L, "vararg table has no proper 'n'"); - return cast_int(ivalue(&res)); - } -} - - -/* -** Get 'wanted' vararg arguments and put them in 'where'. 'vatab' is -** the register of the vararg table or -1 if there is no vararg table. -*/ -void luaT_getvarargs (lua_State *L, CallInfo *ci, StkId where, int wanted, - int vatab) { - Table *h = (vatab < 0) ? NULL : hvalue(s2v(ci->func.p + vatab + 1)); - int nargs = getnumargs(L, ci, h); /* number of available vararg args. */ - int i, touse; /* 'touse' is minimum between 'wanted' and 'nargs' */ - if (wanted < 0) { - touse = wanted = nargs; /* get all extra arguments available */ - checkstackp(L, nargs, where); /* ensure stack space */ - L->top.p = where + nargs; /* next instruction will need top */ - } - else - touse = (nargs > wanted) ? wanted : nargs; - if (h == NULL) { /* no vararg table? */ - for (i = 0; i < touse; i++) /* get vararg values from the stack */ - setobjs2s(L, where + i, ci->func.p - nargs + i); - } - else { /* get vararg values from vararg table */ - for (i = 0; i < touse; i++) { - lu_byte tag = luaH_getint(h, i + 1, s2v(where + i)); - if (tagisempty(tag)) - setnilvalue2s(where + i); - } - } - for (; i < wanted; i++) /* complete required results with nil */ - setnilvalue2s(where + i); -} - diff --git a/lib/lua/ltm.h b/lib/lua/ltm.h deleted file mode 100644 index afc7ad0..0000000 --- a/lib/lua/ltm.h +++ /dev/null @@ -1,105 +0,0 @@ -/* -** $Id: ltm.h $ -** Tag methods -** See Copyright Notice in lua.h -*/ - -#ifndef ltm_h -#define ltm_h - - -#include "lobject.h" - - -/* -* WARNING: if you change the order of this enumeration, -* grep "ORDER TM" and "ORDER OP" -*/ -typedef enum { - TM_INDEX, - TM_NEWINDEX, - TM_GC, - TM_MODE, - TM_LEN, - TM_EQ, /* last tag method with fast access */ - TM_ADD, - TM_SUB, - TM_MUL, - TM_MOD, - TM_POW, - TM_DIV, - TM_IDIV, - TM_BAND, - TM_BOR, - TM_BXOR, - TM_SHL, - TM_SHR, - TM_UNM, - TM_BNOT, - TM_LT, - TM_LE, - TM_CONCAT, - TM_CALL, - TM_CLOSE, - TM_N /* number of elements in the enum */ -} TMS; - - -/* -** Mask with 1 in all fast-access methods. A 1 in any of these bits -** in the flag of a (meta)table means the metatable does not have the -** corresponding metamethod field. (Bit 6 of the flag indicates that -** the table is using the dummy node.) -*/ -#define maskflags cast_byte(~(~0u << (TM_EQ + 1))) - - -/* -** Test whether there is no tagmethod. -** (Because tagmethods use raw accesses, the result may be an "empty" nil.) -*/ -#define notm(tm) ttisnil(tm) - -#define checknoTM(mt,e) ((mt) == NULL || (mt)->flags & (1u<<(e))) - -#define gfasttm(g,mt,e) \ - (checknoTM(mt, e) ? NULL : luaT_gettm(mt, e, (g)->tmname[e])) - -#define fasttm(l,mt,e) gfasttm(G(l), mt, e) - -#define ttypename(x) luaT_typenames_[(x) + 1] - -LUAI_DDEC(const char *const luaT_typenames_[LUA_TOTALTYPES];) - - -LUAI_FUNC const char *luaT_objtypename (lua_State *L, const TValue *o); - -LUAI_FUNC const TValue *luaT_gettm (Table *events, TMS event, TString *ename); -LUAI_FUNC const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, - TMS event); -LUAI_FUNC void luaT_init (lua_State *L); - -LUAI_FUNC void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1, - const TValue *p2, const TValue *p3); -LUAI_FUNC lu_byte luaT_callTMres (lua_State *L, const TValue *f, - const TValue *p1, const TValue *p2, StkId p3); -LUAI_FUNC void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2, - StkId res, TMS event); -LUAI_FUNC void luaT_tryconcatTM (lua_State *L); -LUAI_FUNC void luaT_trybinassocTM (lua_State *L, const TValue *p1, - const TValue *p2, int inv, StkId res, TMS event); -LUAI_FUNC void luaT_trybiniTM (lua_State *L, const TValue *p1, lua_Integer i2, - int inv, StkId res, TMS event); -LUAI_FUNC int luaT_callorderTM (lua_State *L, const TValue *p1, - const TValue *p2, TMS event); -LUAI_FUNC int luaT_callorderiTM (lua_State *L, const TValue *p1, int v2, - int inv, int isfloat, TMS event); - -LUAI_FUNC void luaT_adjustvarargs (lua_State *L, struct CallInfo *ci, - const Proto *p); -LUAI_FUNC void luaT_getvararg (CallInfo *ci, StkId ra, TValue *rc); -LUAI_FUNC void luaT_getvarargs (lua_State *L, struct CallInfo *ci, StkId where, - int wanted, int vatab); - - -#endif diff --git a/lib/lua/lua.c b/lib/lua/lua.c deleted file mode 100644 index 858a04c..0000000 --- a/lib/lua/lua.c +++ /dev/null @@ -1,794 +0,0 @@ -/* -** $Id: lua.c $ -** Lua stand-alone interpreter -** See Copyright Notice in lua.h -*/ - -#define lua_c - -#include "lprefix.h" - - -#include -#include -#include - -#include - -#include "lua.h" - -#include "lauxlib.h" -#include "lualib.h" -#include "llimits.h" - - -#if !defined(LUA_PROGNAME) -#define LUA_PROGNAME "lua" -#endif - -#if !defined(LUA_INIT_VAR) -#define LUA_INIT_VAR "LUA_INIT" -#endif - -/* Name of the environment variable with the name of the readline library */ -#if !defined(LUA_RLLIB_VAR) -#define LUA_RLLIB_VAR "LUA_READLINELIB" -#endif - - -#define LUA_INITVARVERSION LUA_INIT_VAR LUA_VERSUFFIX - - -static lua_State *globalL = NULL; - -static const char *progname = LUA_PROGNAME; - - -#if defined(LUA_USE_POSIX) /* { */ - -/* -** Use 'sigaction' when available. -*/ -static void setsignal (int sig, void (*handler)(int)) { - struct sigaction sa; - sa.sa_handler = handler; - sa.sa_flags = 0; - sigemptyset(&sa.sa_mask); /* do not mask any signal */ - sigaction(sig, &sa, NULL); -} - -#else /* }{ */ - -#define setsignal signal - -#endif /* } */ - - -/* -** Hook set by signal function to stop the interpreter. -*/ -static void lstop (lua_State *L, lua_Debug *ar) { - (void)ar; /* unused arg. */ - lua_sethook(L, NULL, 0, 0); /* reset hook */ - luaL_error(L, "interrupted!"); -} - - -/* -** Function to be called at a C signal. Because a C signal cannot -** just change a Lua state (as there is no proper synchronization), -** this function only sets a hook that, when called, will stop the -** interpreter. -*/ -static void laction (int i) { - int flag = LUA_MASKCALL | LUA_MASKRET | LUA_MASKLINE | LUA_MASKCOUNT; - setsignal(i, SIG_DFL); /* if another SIGINT happens, terminate process */ - lua_sethook(globalL, lstop, flag, 1); -} - - -static void print_usage (const char *badoption) { - lua_writestringerror("%s: ", progname); - if (badoption[1] == 'e' || badoption[1] == 'l') - lua_writestringerror("'%s' needs argument\n", badoption); - else - lua_writestringerror("unrecognized option '%s'\n", badoption); - lua_writestringerror( - "usage: %s [options] [script [args]]\n" - "Available options are:\n" - " -e stat execute string 'stat'\n" - " -i enter interactive mode after executing 'script'\n" - " -l mod require library 'mod' into global 'mod'\n" - " -l g=mod require library 'mod' into global 'g'\n" - " -v show version information\n" - " -E ignore environment variables\n" - " -W turn warnings on\n" - " -- stop handling options\n" - " - stop handling options and execute stdin\n" - , - progname); -} - - -/* -** Prints an error message, adding the program name in front of it -** (if present) -*/ -static void l_message (const char *pname, const char *msg) { - if (pname) lua_writestringerror("%s: ", pname); - lua_writestringerror("%s\n", msg); -} - - -/* -** Check whether 'status' is not OK and, if so, prints the error -** message on the top of the stack. -*/ -static int report (lua_State *L, int status) { - if (status != LUA_OK) { - const char *msg = lua_tostring(L, -1); - if (msg == NULL) - msg = "(error message not a string)"; - l_message(progname, msg); - lua_pop(L, 1); /* remove message */ - } - return status; -} - - -/* -** Message handler used to run all chunks -*/ -static int msghandler (lua_State *L) { - const char *msg = lua_tostring(L, 1); - if (msg == NULL) { /* is error object not a string? */ - if (luaL_callmeta(L, 1, "__tostring") && /* does it have a metamethod */ - lua_type(L, -1) == LUA_TSTRING) /* that produces a string? */ - return 1; /* that is the message */ - else - msg = lua_pushfstring(L, "(error object is a %s value)", - luaL_typename(L, 1)); - } - luaL_traceback(L, L, msg, 1); /* append a standard traceback */ - return 1; /* return the traceback */ -} - - -/* -** Interface to 'lua_pcall', which sets appropriate message function -** and C-signal handler. Used to run all chunks. -*/ -static int docall (lua_State *L, int narg, int nres) { - int status; - int base = lua_gettop(L) - narg; /* function index */ - lua_pushcfunction(L, msghandler); /* push message handler */ - lua_insert(L, base); /* put it under function and args */ - globalL = L; /* to be available to 'laction' */ - setsignal(SIGINT, laction); /* set C-signal handler */ - status = lua_pcall(L, narg, nres, base); - setsignal(SIGINT, SIG_DFL); /* reset C-signal handler */ - lua_remove(L, base); /* remove message handler from the stack */ - return status; -} - - -static void print_version (void) { - lua_writestring(LUA_COPYRIGHT, strlen(LUA_COPYRIGHT)); - lua_writeline(); -} - - -/* -** Create the 'arg' table, which stores all arguments from the -** command line ('argv'). It should be aligned so that, at index 0, -** it has 'argv[script]', which is the script name. The arguments -** to the script (everything after 'script') go to positive indices; -** other arguments (before the script name) go to negative indices. -** If there is no script name, assume interpreter's name as base. -** (If there is no interpreter's name either, 'script' is -1, so -** table sizes are zero.) -*/ -static void createargtable (lua_State *L, char **argv, int argc, int script) { - int i, narg; - narg = argc - (script + 1); /* number of positive indices */ - lua_createtable(L, narg, script + 1); - for (i = 0; i < argc; i++) { - lua_pushstring(L, argv[i]); - lua_rawseti(L, -2, i - script); - } - lua_setglobal(L, "arg"); -} - - -static int dochunk (lua_State *L, int status) { - if (status == LUA_OK) status = docall(L, 0, 0); - return report(L, status); -} - - -static int dofile (lua_State *L, const char *name) { - return dochunk(L, luaL_loadfilex(L, name, "bt")); -} - - -static int dostring (lua_State *L, const char *s, const char *name) { - return dochunk(L, luaL_loadbufferx(L, s, strlen(s), name, "t")); -} - - -/* -** Receives 'globname[=modname]' and runs 'globname = require(modname)'. -** If there is no explicit modname and globname contains a '-', cut -** the suffix after '-' (the "version") to make the global name. -*/ -static int dolibrary (lua_State *L, char *globname) { - int status; - char *suffix = NULL; - char *modname = strchr(globname, '='); - if (modname == NULL) { /* no explicit name? */ - modname = globname; /* module name is equal to global name */ - suffix = strchr(modname, *LUA_IGMARK); /* look for a suffix mark */ - } - else { - *modname = '\0'; /* global name ends here */ - modname++; /* module name starts after the '=' */ - } - lua_getglobal(L, "require"); - lua_pushstring(L, modname); - status = docall(L, 1, 1); /* call 'require(modname)' */ - if (status == LUA_OK) { - if (suffix != NULL) /* is there a suffix mark? */ - *suffix = '\0'; /* remove suffix from global name */ - lua_setglobal(L, globname); /* globname = require(modname) */ - } - return report(L, status); -} - - -/* -** Push on the stack the contents of table 'arg' from 1 to #arg -*/ -static int pushargs (lua_State *L) { - int i, n; - if (lua_getglobal(L, "arg") != LUA_TTABLE) - luaL_error(L, "'arg' is not a table"); - n = (int)luaL_len(L, -1); - luaL_checkstack(L, n + 3, "too many arguments to script"); - for (i = 1; i <= n; i++) - lua_rawgeti(L, -i, i); - lua_remove(L, -i); /* remove table from the stack */ - return n; -} - - -static int handle_script (lua_State *L, char **argv) { - int status; - const char *fname = argv[0]; - if (strcmp(fname, "-") == 0 && strcmp(argv[-1], "--") != 0) - fname = NULL; /* stdin */ - status = luaL_loadfilex(L, fname, "bt"); - if (status == LUA_OK) { - int n = pushargs(L); /* push arguments to script */ - status = docall(L, n, LUA_MULTRET); - } - return report(L, status); -} - - -/* bits of various argument indicators in 'args' */ -#define has_error 1 /* bad option */ -#define has_i 2 /* -i */ -#define has_v 4 /* -v */ -#define has_e 8 /* -e */ -#define has_E 16 /* -E */ - - -/* -** Traverses all arguments from 'argv', returning a mask with those -** needed before running any Lua code or an error code if it finds any -** invalid argument. In case of error, 'first' is the index of the bad -** argument. Otherwise, 'first' is -1 if there is no program name, -** 0 if there is no script name, or the index of the script name. -*/ -static int collectargs (char **argv, int *first) { - int args = 0; - int i; - if (argv[0] != NULL) { /* is there a program name? */ - if (argv[0][0]) /* not empty? */ - progname = argv[0]; /* save it */ - } - else { /* no program name */ - *first = -1; - return 0; - } - for (i = 1; argv[i] != NULL; i++) { /* handle arguments */ - *first = i; - if (argv[i][0] != '-') /* not an option? */ - return args; /* stop handling options */ - switch (argv[i][1]) { /* else check option */ - case '-': /* '--' */ - if (argv[i][2] != '\0') /* extra characters after '--'? */ - return has_error; /* invalid option */ - /* if there is a script name, it comes after '--' */ - *first = (argv[i + 1] != NULL) ? i + 1 : 0; - return args; - case '\0': /* '-' */ - return args; /* script "name" is '-' */ - case 'E': - if (argv[i][2] != '\0') /* extra characters? */ - return has_error; /* invalid option */ - args |= has_E; - break; - case 'W': - if (argv[i][2] != '\0') /* extra characters? */ - return has_error; /* invalid option */ - break; - case 'i': - args |= has_i; /* (-i implies -v) *//* FALLTHROUGH */ - case 'v': - if (argv[i][2] != '\0') /* extra characters? */ - return has_error; /* invalid option */ - args |= has_v; - break; - case 'e': - args |= has_e; /* FALLTHROUGH */ - case 'l': /* both options need an argument */ - if (argv[i][2] == '\0') { /* no concatenated argument? */ - i++; /* try next 'argv' */ - if (argv[i] == NULL || argv[i][0] == '-') - return has_error; /* no next argument or it is another option */ - } - break; - default: /* invalid option */ - return has_error; - } - } - *first = 0; /* no script name */ - return args; -} - - -/* -** Processes options 'e' and 'l', which involve running Lua code, and -** 'W', which also affects the state. -** Returns 0 if some code raises an error. -*/ -static int runargs (lua_State *L, char **argv, int n) { - int i; - lua_warning(L, "@off", 0); /* by default, Lua stand-alone has warnings off */ - for (i = 1; i < n; i++) { - int option = argv[i][1]; - lua_assert(argv[i][0] == '-'); /* already checked */ - switch (option) { - case 'e': case 'l': { - int status; - char *extra = argv[i] + 2; /* both options need an argument */ - if (*extra == '\0') extra = argv[++i]; - lua_assert(extra != NULL); - status = (option == 'e') - ? dostring(L, extra, "=(command line)") - : dolibrary(L, extra); - if (status != LUA_OK) return 0; - break; - } - case 'W': - lua_warning(L, "@on", 0); /* warnings on */ - break; - } - } - return 1; -} - - -static char *(*l_getenv)(const char *name); - -/* Function to ignore environment variables, used by option -E */ -static char *no_getenv (const char *name) { - UNUSED(name); - return NULL; -} - - -static int handle_luainit (lua_State *L) { - const char *name = "=" LUA_INITVARVERSION; - const char *init = l_getenv(name + 1); - if (init == NULL) { - name = "=" LUA_INIT_VAR; - init = l_getenv(name + 1); /* try alternative name */ - } - if (init == NULL) return LUA_OK; - else if (init[0] == '@') - return dofile(L, init+1); - else - return dostring(L, init, name); -} - - -/* -** {================================================================== -** Read-Eval-Print Loop (REPL) -** =================================================================== -*/ - -#if !defined(LUA_PROMPT) -#define LUA_PROMPT "> " -#define LUA_PROMPT2 ">> " -#endif - -#if !defined(LUA_MAXINPUT) -#define LUA_MAXINPUT 512 -#endif - - -/* -** lua_stdin_is_tty detects whether the standard input is a 'tty' (that -** is, whether we're running lua interactively). -*/ -#if !defined(lua_stdin_is_tty) /* { */ - -#if defined(LUA_USE_POSIX) /* { */ - -#include -#define lua_stdin_is_tty() isatty(0) - -#elif defined(LUA_USE_WINDOWS) /* }{ */ - -#include -#include - -#define lua_stdin_is_tty() _isatty(_fileno(stdin)) - -#else /* }{ */ - -/* ISO C definition */ -#define lua_stdin_is_tty() 1 /* assume stdin is a tty */ - -#endif /* } */ - -#endif /* } */ - - -/* -** * lua_initreadline initializes the readline system. -** * lua_readline defines how to show a prompt and then read a line from -** the standard input. -** * lua_saveline defines how to "save" a read line in a "history". -** * lua_freeline defines how to free a line read by lua_readline. -*/ - -#if !defined(lua_readline) /* { */ -/* Otherwise, all previously listed functions should be defined. */ - -#if defined(LUA_USE_READLINE) /* { */ -/* Lua will be linked with '-lreadline' */ - -#include -#include - -#define lua_initreadline(L) ((void)L, rl_readline_name="lua") -#define lua_readline(buff,prompt) ((void)buff, readline(prompt)) -#define lua_saveline(line) add_history(line) -#define lua_freeline(line) free(line) - -#else /* }{ */ -/* use dynamically loaded readline (or nothing) */ - -/* pointer to 'readline' function (if any) */ -typedef char *(*l_readlineT) (const char *prompt); -static l_readlineT l_readline = NULL; - -/* pointer to 'add_history' function (if any) */ -typedef void (*l_addhistT) (const char *string); -static l_addhistT l_addhist = NULL; - - -static char *lua_readline (char *buff, const char *prompt) { - if (l_readline != NULL) /* is there a 'readline'? */ - return (*l_readline)(prompt); /* use it */ - else { /* emulate 'readline' over 'buff' */ - fputs(prompt, stdout); - fflush(stdout); /* show prompt */ - return fgets(buff, LUA_MAXINPUT, stdin); /* read line */ - } -} - - -static void lua_saveline (const char *line) { - if (l_addhist != NULL) /* is there an 'add_history'? */ - (*l_addhist)(line); /* use it */ - /* else nothing to be done */ -} - - -static void lua_freeline (char *line) { - if (l_readline != NULL) /* is there a 'readline'? */ - free(line); /* free line created by it */ - /* else 'lua_readline' used an automatic buffer; nothing to free */ -} - - -#if defined(LUA_USE_DLOPEN) && defined(LUA_READLINELIB) /* { */ -/* try to load 'readline' dynamically */ - -#include - -static void lua_initreadline (lua_State *L) { - const char *rllib = l_getenv(LUA_RLLIB_VAR); /* name of readline library */ - void *lib; /* library handle */ - if (rllib == NULL) /* no environment variable? */ - rllib = LUA_READLINELIB; /* use default name */ - lib = dlopen(rllib, RTLD_NOW | RTLD_LOCAL); - if (lib != NULL) { - const char **name = cast(const char**, dlsym(lib, "rl_readline_name")); - if (name != NULL) - *name = "lua"; - l_readline = cast(l_readlineT, cast_func(dlsym(lib, "readline"))); - l_addhist = cast(l_addhistT, cast_func(dlsym(lib, "add_history"))); - if (l_readline != NULL) /* could load readline function? */ - return; /* everything ok */ - /* else emit a warning */ - } - lua_warning(L, "unable to load readline library '", 1); - lua_warning(L, rllib, 1); - lua_warning(L, "'", 0); -} - -#else /* }{ */ -/* no dlopen or LUA_READLINELIB undefined */ - -/* Leave pointers with NULL */ -#define lua_initreadline(L) ((void)L) - -#endif /* } */ - -#endif /* } */ - -#endif /* } */ - - -/* -** Return the string to be used as a prompt by the interpreter. Leave -** the string (or nil, if using the default value) on the stack, to keep -** it anchored. -*/ -static const char *get_prompt (lua_State *L, int firstline) { - if (lua_getglobal(L, firstline ? "_PROMPT" : "_PROMPT2") == LUA_TNIL) - return (firstline ? LUA_PROMPT : LUA_PROMPT2); /* use the default */ - else { /* apply 'tostring' over the value */ - const char *p = luaL_tolstring(L, -1, NULL); - lua_remove(L, -2); /* remove original value */ - return p; - } -} - -/* mark in error messages for incomplete statements */ -#define EOFMARK "" -#define marklen (sizeof(EOFMARK)/sizeof(char) - 1) - - -/* -** Check whether 'status' signals a syntax error and the error -** message at the top of the stack ends with the above mark for -** incomplete statements. -*/ -static int incomplete (lua_State *L, int status) { - if (status == LUA_ERRSYNTAX) { - size_t lmsg; - const char *msg = lua_tolstring(L, -1, &lmsg); - if (lmsg >= marklen && strcmp(msg + lmsg - marklen, EOFMARK) == 0) - return 1; - } - return 0; /* else... */ -} - - -/* -** Prompt the user, read a line, and push it into the Lua stack. -*/ -static int pushline (lua_State *L, int firstline) { - char buffer[LUA_MAXINPUT]; - size_t l; - const char *prmt = get_prompt(L, firstline); - char *b = lua_readline(buffer, prmt); - lua_pop(L, 1); /* remove prompt */ - if (b == NULL) - return 0; /* no input */ - l = strlen(b); - if (l > 0 && b[l-1] == '\n') /* line ends with newline? */ - b[--l] = '\0'; /* remove it */ - lua_pushlstring(L, b, l); - lua_freeline(b); - return 1; -} - - -/* -** Try to compile line on the stack as 'return ;'; on return, stack -** has either compiled chunk or original line (if compilation failed). -*/ -static int addreturn (lua_State *L) { - const char *line = lua_tostring(L, -1); /* original line */ - const char *retline = lua_pushfstring(L, "return %s;", line); - int status = luaL_loadbufferx(L, retline, strlen(retline), "=stdin", "t"); - if (status == LUA_OK) - lua_remove(L, -2); /* remove modified line */ - else - lua_pop(L, 2); /* pop result from 'luaL_loadbufferx' and modified line */ - return status; -} - - -static void checklocal (const char *line) { - static const size_t szloc = sizeof("local") - 1; - static const char space[] = " \t"; - line += strspn(line, space); /* skip spaces */ - if (strncmp(line, "local", szloc) == 0 && /* "local"? */ - strchr(space, *(line + szloc)) != NULL) { /* followed by a space? */ - lua_writestringerror("%s\n", - "warning: locals do not survive across lines in interactive mode"); - } -} - - -/* -** Read multiple lines until a complete Lua statement or an error not -** for an incomplete statement. Start with first line already read in -** the stack. -*/ -static int multiline (lua_State *L) { - size_t len; - const char *line = lua_tolstring(L, 1, &len); /* get first line */ - checklocal(line); - for (;;) { /* repeat until gets a complete statement */ - int status = luaL_loadbufferx(L, line, len, "=stdin", "t"); /* try it */ - if (!incomplete(L, status) || !pushline(L, 0)) - return status; /* should not or cannot try to add continuation line */ - lua_remove(L, -2); /* remove error message (from incomplete line) */ - lua_pushliteral(L, "\n"); /* add newline... */ - lua_insert(L, -2); /* ...between the two lines */ - lua_concat(L, 3); /* join them */ - line = lua_tolstring(L, 1, &len); /* get what is has */ - } -} - - -/* -** Read a line and try to load (compile) it first as an expression (by -** adding "return " in front of it) and second as a statement. Return -** the final status of load/call with the resulting function (if any) -** in the top of the stack. -*/ -static int loadline (lua_State *L) { - const char *line; - int status; - lua_settop(L, 0); - if (!pushline(L, 1)) - return -1; /* no input */ - if ((status = addreturn(L)) != LUA_OK) /* 'return ...' did not work? */ - status = multiline(L); /* try as command, maybe with continuation lines */ - line = lua_tostring(L, 1); - if (line[0] != '\0') /* non empty? */ - lua_saveline(line); /* keep history */ - lua_remove(L, 1); /* remove line from the stack */ - lua_assert(lua_gettop(L) == 1); - return status; -} - - -/* -** Prints (calling the Lua 'print' function) any values on the stack -*/ -static void l_print (lua_State *L) { - int n = lua_gettop(L); - if (n > 0) { /* any result to be printed? */ - luaL_checkstack(L, LUA_MINSTACK, "too many results to print"); - lua_getglobal(L, "print"); - lua_insert(L, 1); - if (lua_pcall(L, n, 0, 0) != LUA_OK) - l_message(progname, lua_pushfstring(L, "error calling 'print' (%s)", - lua_tostring(L, -1))); - } -} - - -/* -** Do the REPL: repeatedly read (load) a line, evaluate (call) it, and -** print any results. -*/ -static void doREPL (lua_State *L) { - int status; - const char *oldprogname = progname; - progname = NULL; /* no 'progname' on errors in interactive mode */ - lua_initreadline(L); - while ((status = loadline(L)) != -1) { - if (status == LUA_OK) - status = docall(L, 0, LUA_MULTRET); - if (status == LUA_OK) l_print(L); - else report(L, status); - } - lua_settop(L, 0); /* clear stack */ - lua_writeline(); - progname = oldprogname; -} - -/* }================================================================== */ - -#if !defined(luai_openlibs) -#if defined(LUA_NODEBUGLIB) -/* With this option, code must require the debug library before using it */ -#define luai_openlibs(L) luaL_openselectedlibs(L, ~LUA_DBLIBK, LUA_DBLIBK) -#else -/* The default is to open all standard libraries */ -#define luai_openlibs(L) luaL_openselectedlibs(L, ~0, 0) -#endif -#endif - - -/* -** Main body of stand-alone interpreter (to be called in protected mode). -** Reads the options and handles them all. -*/ -static int pmain (lua_State *L) { - int argc = (int)lua_tointeger(L, 1); - char **argv = (char **)lua_touserdata(L, 2); - int script; - int args = collectargs(argv, &script); - int optlim = (script > 0) ? script : argc; /* first argv not an option */ - luaL_checkversion(L); /* check that interpreter has correct version */ - if (args == has_error) { /* bad arg? */ - print_usage(argv[script]); /* 'script' has index of bad arg. */ - return 0; - } - if (args & has_v) /* option '-v'? */ - print_version(); - if (args & has_E) { /* option '-E'? */ - l_getenv = &no_getenv; /* program will ignore environment variables */ - lua_pushboolean(L, 1); /* signal for libraries to ignore env. vars. */ - lua_setfield(L, LUA_REGISTRYINDEX, "LUA_NOENV"); - } - else - l_getenv = &getenv; - luai_openlibs(L); /* open standard libraries */ - createargtable(L, argv, argc, script); /* create table 'arg' */ - lua_gc(L, LUA_GCRESTART); /* start GC... */ - lua_gc(L, LUA_GCGEN); /* ...in generational mode */ - if (handle_luainit(L) != LUA_OK) /* run LUA_INIT */ - return 0; /* error running LUA_INIT */ - if (!runargs(L, argv, optlim)) /* execute arguments -e, -l, and -W */ - return 0; /* something failed */ - if (script > 0) { /* execute main script (if there is one) */ - if (handle_script(L, argv + script) != LUA_OK) - return 0; /* interrupt in case of error */ - } - if (args & has_i) /* -i option? */ - doREPL(L); /* do read-eval-print loop */ - else if (script < 1 && !(args & (has_e | has_v))) { /* no active option? */ - if (lua_stdin_is_tty()) { /* running in interactive mode? */ - print_version(); - doREPL(L); /* do read-eval-print loop */ - } - else dofile(L, NULL); /* executes stdin as a file */ - } - lua_pushboolean(L, 1); /* signal no errors */ - return 1; -} - - -int main (int argc, char **argv) { - int status, result; - lua_State *L = luaL_newstate(); /* create state */ - if (L == NULL) { - l_message(argv[0], "cannot create state: not enough memory"); - return EXIT_FAILURE; - } - lua_gc(L, LUA_GCSTOP); /* stop GC while building state */ - lua_pushcfunction(L, &pmain); /* to call 'pmain' in protected mode */ - lua_pushinteger(L, argc); /* 1st argument */ - lua_pushlightuserdata(L, argv); /* 2nd argument */ - status = lua_pcall(L, 2, 1, 0); /* do the call */ - result = lua_toboolean(L, -1); /* get result */ - report(L, status); - lua_close(L); - return (result && status == LUA_OK) ? EXIT_SUCCESS : EXIT_FAILURE; -} - diff --git a/lib/lua/lua.h b/lib/lua/lua.h deleted file mode 100644 index 6deaed4..0000000 --- a/lib/lua/lua.h +++ /dev/null @@ -1,547 +0,0 @@ -/* -** $Id: lua.h $ -** Lua - A Scripting Language -** Lua.org, PUC-Rio, Brazil (www.lua.org) -** See Copyright Notice at the end of this file -*/ - - -#ifndef lua_h -#define lua_h - -#include -#include - - -#define LUA_COPYRIGHT LUA_RELEASE " Copyright (C) 1994-2026 Lua.org, PUC-Rio" -#define LUA_AUTHORS "R. Ierusalimschy, L. H. de Figueiredo, W. Celes" - - -#define LUA_VERSION_MAJOR_N 5 -#define LUA_VERSION_MINOR_N 5 -#define LUA_VERSION_RELEASE_N 1 - -#define LUA_VERSION_NUM (LUA_VERSION_MAJOR_N * 100 + LUA_VERSION_MINOR_N) -#define LUA_VERSION_RELEASE_NUM (LUA_VERSION_NUM * 100 + LUA_VERSION_RELEASE_N) - - -#include "luaconf.h" - - -/* mark for precompiled code ('Lua') */ -#define LUA_SIGNATURE "\x1bLua" - -/* option for multiple returns in 'lua_pcall' and 'lua_call' */ -#define LUA_MULTRET (-1) - - -/* -** Pseudo-indices -** (The stack size is limited to INT_MAX/2; we keep some free empty -** space after that to help overflow detection.) -*/ -#define LUA_REGISTRYINDEX (-(INT_MAX/2 + 1000)) -#define lua_upvalueindex(i) (LUA_REGISTRYINDEX - (i)) - - -/* thread status */ -#define LUA_OK 0 -#define LUA_YIELD 1 -#define LUA_ERRRUN 2 -#define LUA_ERRSYNTAX 3 -#define LUA_ERRMEM 4 -#define LUA_ERRERR 5 - - -typedef struct lua_State lua_State; - - -/* -** basic types -*/ -#define LUA_TNONE (-1) - -#define LUA_TNIL 0 -#define LUA_TBOOLEAN 1 -#define LUA_TLIGHTUSERDATA 2 -#define LUA_TNUMBER 3 -#define LUA_TSTRING 4 -#define LUA_TTABLE 5 -#define LUA_TFUNCTION 6 -#define LUA_TUSERDATA 7 -#define LUA_TTHREAD 8 - -#define LUA_NUMTYPES 9 - - - -/* minimum Lua stack available to a C function */ -#define LUA_MINSTACK 20 - - -/* predefined values in the registry */ -/* index 1 is reserved for the reference mechanism */ -#define LUA_RIDX_GLOBALS 2 -#define LUA_RIDX_MAINTHREAD 3 -#define LUA_RIDX_LAST 3 - - -/* type of numbers in Lua */ -typedef LUA_NUMBER lua_Number; - - -/* type for integer functions */ -typedef LUA_INTEGER lua_Integer; - -/* unsigned integer type */ -typedef LUA_UNSIGNED lua_Unsigned; - -/* type for continuation-function contexts */ -typedef LUA_KCONTEXT lua_KContext; - - -/* -** Type for C functions registered with Lua -*/ -typedef int (*lua_CFunction) (lua_State *L); - -/* -** Type for continuation functions -*/ -typedef int (*lua_KFunction) (lua_State *L, int status, lua_KContext ctx); - - -/* -** Type for functions that read/write blocks when loading/dumping Lua chunks -*/ -typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz); - -typedef int (*lua_Writer) (lua_State *L, const void *p, size_t sz, void *ud); - - -/* -** Type for memory-allocation functions -*/ -typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize); - - -/* -** Type for warning functions -*/ -typedef void (*lua_WarnFunction) (void *ud, const char *msg, int tocont); - - -/* -** Type used by the debug API to collect debug information -*/ -typedef struct lua_Debug lua_Debug; - - -/* -** Functions to be called by the debugger in specific events -*/ -typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar); - - -/* -** generic extra include file -*/ -#if defined(LUA_USER_H) -#include LUA_USER_H -#endif - - -/* -** RCS ident string -*/ -extern const char lua_ident[]; - - -/* -** state manipulation -*/ -LUA_API lua_State *(lua_newstate) (lua_Alloc f, void *ud, unsigned seed); -LUA_API void (lua_close) (lua_State *L); -LUA_API lua_State *(lua_newthread) (lua_State *L); -LUA_API int (lua_closethread) (lua_State *L, lua_State *from); - -LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf); - - -LUA_API lua_Number (lua_version) (lua_State *L); - - -/* -** basic stack manipulation -*/ -LUA_API int (lua_absindex) (lua_State *L, int idx); -LUA_API int (lua_gettop) (lua_State *L); -LUA_API void (lua_settop) (lua_State *L, int idx); -LUA_API void (lua_pushvalue) (lua_State *L, int idx); -LUA_API void (lua_rotate) (lua_State *L, int idx, int n); -LUA_API void (lua_copy) (lua_State *L, int fromidx, int toidx); -LUA_API int (lua_checkstack) (lua_State *L, int n); - -LUA_API void (lua_xmove) (lua_State *from, lua_State *to, int n); - - -/* -** access functions (stack -> C) -*/ - -LUA_API int (lua_isnumber) (lua_State *L, int idx); -LUA_API int (lua_isstring) (lua_State *L, int idx); -LUA_API int (lua_iscfunction) (lua_State *L, int idx); -LUA_API int (lua_isinteger) (lua_State *L, int idx); -LUA_API int (lua_isuserdata) (lua_State *L, int idx); -LUA_API int (lua_type) (lua_State *L, int idx); -LUA_API const char *(lua_typename) (lua_State *L, int tp); - -LUA_API lua_Number (lua_tonumberx) (lua_State *L, int idx, int *isnum); -LUA_API lua_Integer (lua_tointegerx) (lua_State *L, int idx, int *isnum); -LUA_API int (lua_toboolean) (lua_State *L, int idx); -LUA_API const char *(lua_tolstring) (lua_State *L, int idx, size_t *len); -LUA_API lua_Unsigned (lua_rawlen) (lua_State *L, int idx); -LUA_API lua_CFunction (lua_tocfunction) (lua_State *L, int idx); -LUA_API void *(lua_touserdata) (lua_State *L, int idx); -LUA_API lua_State *(lua_tothread) (lua_State *L, int idx); -LUA_API const void *(lua_topointer) (lua_State *L, int idx); - - -/* -** Comparison and arithmetic functions -*/ - -#define LUA_OPADD 0 /* ORDER TM, ORDER OP */ -#define LUA_OPSUB 1 -#define LUA_OPMUL 2 -#define LUA_OPMOD 3 -#define LUA_OPPOW 4 -#define LUA_OPDIV 5 -#define LUA_OPIDIV 6 -#define LUA_OPBAND 7 -#define LUA_OPBOR 8 -#define LUA_OPBXOR 9 -#define LUA_OPSHL 10 -#define LUA_OPSHR 11 -#define LUA_OPUNM 12 -#define LUA_OPBNOT 13 - -LUA_API void (lua_arith) (lua_State *L, int op); - -#define LUA_OPEQ 0 -#define LUA_OPLT 1 -#define LUA_OPLE 2 - -LUA_API int (lua_rawequal) (lua_State *L, int idx1, int idx2); -LUA_API int (lua_compare) (lua_State *L, int idx1, int idx2, int op); - - -/* -** push functions (C -> stack) -*/ -LUA_API void (lua_pushnil) (lua_State *L); -LUA_API void (lua_pushnumber) (lua_State *L, lua_Number n); -LUA_API void (lua_pushinteger) (lua_State *L, lua_Integer n); -LUA_API const char *(lua_pushlstring) (lua_State *L, const char *s, size_t len); -LUA_API const char *(lua_pushexternalstring) (lua_State *L, - const char *s, size_t len, lua_Alloc falloc, void *ud); -LUA_API const char *(lua_pushstring) (lua_State *L, const char *s); -LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt, - va_list argp); -LUA_API const char *(lua_pushfstring) (lua_State *L, const char *fmt, ...); -LUA_API void (lua_pushcclosure) (lua_State *L, lua_CFunction fn, int n); -LUA_API void (lua_pushboolean) (lua_State *L, int b); -LUA_API void (lua_pushlightuserdata) (lua_State *L, void *p); -LUA_API int (lua_pushthread) (lua_State *L); - - -/* -** get functions (Lua -> stack) -*/ -LUA_API int (lua_getglobal) (lua_State *L, const char *name); -LUA_API int (lua_gettable) (lua_State *L, int idx); -LUA_API int (lua_getfield) (lua_State *L, int idx, const char *k); -LUA_API int (lua_geti) (lua_State *L, int idx, lua_Integer n); -LUA_API int (lua_rawget) (lua_State *L, int idx); -LUA_API int (lua_rawgeti) (lua_State *L, int idx, lua_Integer n); -LUA_API int (lua_rawgetp) (lua_State *L, int idx, const void *p); - -LUA_API void (lua_createtable) (lua_State *L, int narr, int nrec); -LUA_API void *(lua_newuserdatauv) (lua_State *L, size_t sz, int nuvalue); -LUA_API int (lua_getmetatable) (lua_State *L, int objindex); -LUA_API int (lua_getiuservalue) (lua_State *L, int idx, int n); - - -/* -** set functions (stack -> Lua) -*/ -LUA_API void (lua_setglobal) (lua_State *L, const char *name); -LUA_API void (lua_settable) (lua_State *L, int idx); -LUA_API void (lua_setfield) (lua_State *L, int idx, const char *k); -LUA_API void (lua_seti) (lua_State *L, int idx, lua_Integer n); -LUA_API void (lua_rawset) (lua_State *L, int idx); -LUA_API void (lua_rawseti) (lua_State *L, int idx, lua_Integer n); -LUA_API void (lua_rawsetp) (lua_State *L, int idx, const void *p); -LUA_API int (lua_setmetatable) (lua_State *L, int objindex); -LUA_API int (lua_setiuservalue) (lua_State *L, int idx, int n); - - -/* -** 'load' and 'call' functions (load and run Lua code) -*/ -LUA_API void (lua_callk) (lua_State *L, int nargs, int nresults, - lua_KContext ctx, lua_KFunction k); -#define lua_call(L,n,r) lua_callk(L, (n), (r), 0, NULL) - -LUA_API int (lua_pcallk) (lua_State *L, int nargs, int nresults, int errfunc, - lua_KContext ctx, lua_KFunction k); -#define lua_pcall(L,n,r,f) lua_pcallk(L, (n), (r), (f), 0, NULL) - -LUA_API int (lua_load) (lua_State *L, lua_Reader reader, void *dt, - const char *chunkname, const char *mode); - -LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data, int strip); - - -/* -** coroutine functions -*/ -LUA_API int (lua_yieldk) (lua_State *L, int nresults, lua_KContext ctx, - lua_KFunction k); -LUA_API int (lua_resume) (lua_State *L, lua_State *from, int narg, - int *nres); -LUA_API int (lua_status) (lua_State *L); -LUA_API int (lua_isyieldable) (lua_State *L); - -#define lua_yield(L,n) lua_yieldk(L, (n), 0, NULL) - - -/* -** Warning-related functions -*/ -LUA_API void (lua_setwarnf) (lua_State *L, lua_WarnFunction f, void *ud); -LUA_API void (lua_warning) (lua_State *L, const char *msg, int tocont); - - -/* -** garbage-collection options -*/ - -#define LUA_GCSTOP 0 -#define LUA_GCRESTART 1 -#define LUA_GCCOLLECT 2 -#define LUA_GCCOUNT 3 -#define LUA_GCCOUNTB 4 -#define LUA_GCSTEP 5 -#define LUA_GCISRUNNING 6 -#define LUA_GCGEN 7 -#define LUA_GCINC 8 -#define LUA_GCPARAM 9 - - -/* -** garbage-collection parameters -*/ -/* parameters for generational mode */ -#define LUA_GCPMINORMUL 0 /* control minor collections */ -#define LUA_GCPMAJORMINOR 1 /* control shift major->minor */ -#define LUA_GCPMINORMAJOR 2 /* control shift minor->major */ - -/* parameters for incremental mode */ -#define LUA_GCPPAUSE 3 /* size of pause between successive GCs */ -#define LUA_GCPSTEPMUL 4 /* GC "speed" */ -#define LUA_GCPSTEPSIZE 5 /* GC granularity */ - -/* number of parameters */ -#define LUA_GCPN 6 - - -LUA_API int (lua_gc) (lua_State *L, int what, ...); - - -/* -** miscellaneous functions -*/ - -LUA_API int (lua_error) (lua_State *L); - -LUA_API int (lua_next) (lua_State *L, int idx); - -LUA_API void (lua_concat) (lua_State *L, int n); -LUA_API void (lua_len) (lua_State *L, int idx); - -#define LUA_N2SBUFFSZ 64 -LUA_API unsigned (lua_numbertocstring) (lua_State *L, int idx, char *buff); -LUA_API size_t (lua_stringtonumber) (lua_State *L, const char *s); - -LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud); -LUA_API void (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud); - -LUA_API void (lua_toclose) (lua_State *L, int idx); -LUA_API void (lua_closeslot) (lua_State *L, int idx); - - -/* -** {============================================================== -** some useful macros -** =============================================================== -*/ - -#define lua_getextraspace(L) ((void *)((char *)(L) - LUA_EXTRASPACE)) - -#define lua_tonumber(L,i) lua_tonumberx(L,(i),NULL) -#define lua_tointeger(L,i) lua_tointegerx(L,(i),NULL) - -#define lua_pop(L,n) lua_settop(L, -(n)-1) - -#define lua_newtable(L) lua_createtable(L, 0, 0) - -#define lua_register(L,n,f) (lua_pushcfunction(L, (f)), lua_setglobal(L, (n))) - -#define lua_pushcfunction(L,f) lua_pushcclosure(L, (f), 0) - -#define lua_isfunction(L,n) (lua_type(L, (n)) == LUA_TFUNCTION) -#define lua_istable(L,n) (lua_type(L, (n)) == LUA_TTABLE) -#define lua_islightuserdata(L,n) (lua_type(L, (n)) == LUA_TLIGHTUSERDATA) -#define lua_isnil(L,n) (lua_type(L, (n)) == LUA_TNIL) -#define lua_isboolean(L,n) (lua_type(L, (n)) == LUA_TBOOLEAN) -#define lua_isthread(L,n) (lua_type(L, (n)) == LUA_TTHREAD) -#define lua_isnone(L,n) (lua_type(L, (n)) == LUA_TNONE) -#define lua_isnoneornil(L, n) (lua_type(L, (n)) <= 0) - -#define lua_pushliteral(L, s) lua_pushstring(L, "" s) - -#define lua_pushglobaltable(L) \ - ((void)lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS)) - -#define lua_tostring(L,i) lua_tolstring(L, (i), NULL) - - -#define lua_insert(L,idx) lua_rotate(L, (idx), 1) - -#define lua_remove(L,idx) (lua_rotate(L, (idx), -1), lua_pop(L, 1)) - -#define lua_replace(L,idx) (lua_copy(L, -1, (idx)), lua_pop(L, 1)) - -/* }============================================================== */ - - -/* -** {============================================================== -** compatibility macros -** =============================================================== -*/ - -#define lua_newuserdata(L,s) lua_newuserdatauv(L,s,1) -#define lua_getuservalue(L,idx) lua_getiuservalue(L,idx,1) -#define lua_setuservalue(L,idx) lua_setiuservalue(L,idx,1) - -#define lua_resetthread(L) lua_closethread(L,NULL) - -/* }============================================================== */ - -/* -** {====================================================================== -** Debug API -** ======================================================================= -*/ - - -/* -** Event codes -*/ -#define LUA_HOOKCALL 0 -#define LUA_HOOKRET 1 -#define LUA_HOOKLINE 2 -#define LUA_HOOKCOUNT 3 -#define LUA_HOOKTAILCALL 4 - - -/* -** Event masks -*/ -#define LUA_MASKCALL (1 << LUA_HOOKCALL) -#define LUA_MASKRET (1 << LUA_HOOKRET) -#define LUA_MASKLINE (1 << LUA_HOOKLINE) -#define LUA_MASKCOUNT (1 << LUA_HOOKCOUNT) - - -LUA_API int (lua_getstack) (lua_State *L, int level, lua_Debug *ar); -LUA_API int (lua_getinfo) (lua_State *L, const char *what, lua_Debug *ar); -LUA_API const char *(lua_getlocal) (lua_State *L, const lua_Debug *ar, int n); -LUA_API const char *(lua_setlocal) (lua_State *L, const lua_Debug *ar, int n); -LUA_API const char *(lua_getupvalue) (lua_State *L, int funcindex, int n); -LUA_API const char *(lua_setupvalue) (lua_State *L, int funcindex, int n); - -LUA_API void *(lua_upvalueid) (lua_State *L, int fidx, int n); -LUA_API void (lua_upvaluejoin) (lua_State *L, int fidx1, int n1, - int fidx2, int n2); - -LUA_API void (lua_sethook) (lua_State *L, lua_Hook func, int mask, int count); -LUA_API lua_Hook (lua_gethook) (lua_State *L); -LUA_API int (lua_gethookmask) (lua_State *L); -LUA_API int (lua_gethookcount) (lua_State *L); - - -struct lua_Debug { - int event; - const char *name; /* (n) */ - const char *namewhat; /* (n) 'global', 'local', 'field', 'method' */ - const char *what; /* (S) 'Lua', 'C', 'main', 'tail' */ - const char *source; /* (S) */ - size_t srclen; /* (S) */ - int currentline; /* (l) */ - int linedefined; /* (S) */ - int lastlinedefined; /* (S) */ - unsigned char nups; /* (u) number of upvalues */ - unsigned char nparams;/* (u) number of parameters */ - char isvararg; /* (u) */ - unsigned char extraargs; /* (t) number of extra arguments */ - char istailcall; /* (t) */ - int ftransfer; /* (r) index of first value transferred */ - int ntransfer; /* (r) number of transferred values */ - char short_src[LUA_IDSIZE]; /* (S) */ - /* private part */ - struct CallInfo *i_ci; /* active function */ -}; - -/* }====================================================================== */ - - -#define LUAI_TOSTRAUX(x) #x -#define LUAI_TOSTR(x) LUAI_TOSTRAUX(x) - -#define LUA_VERSION_MAJOR LUAI_TOSTR(LUA_VERSION_MAJOR_N) -#define LUA_VERSION_MINOR LUAI_TOSTR(LUA_VERSION_MINOR_N) -#define LUA_VERSION_RELEASE LUAI_TOSTR(LUA_VERSION_RELEASE_N) - -#define LUA_VERSION "Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR -#define LUA_RELEASE LUA_VERSION "." LUA_VERSION_RELEASE - - -/****************************************************************************** -* Copyright (C) 1994-2026 Lua.org, PUC-Rio. -* -* Permission is hereby granted, free of charge, to any person obtaining -* a copy of this software and associated documentation files (the -* "Software"), to deal in the Software without restriction, including -* without limitation the rights to use, copy, modify, merge, publish, -* distribute, sublicense, and/or sell copies of the Software, and to -* permit persons to whom the Software is furnished to do so, subject to -* the following conditions: -* -* The above copyright notice and this permission notice shall be -* included in all copies or substantial portions of the Software. -* -* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. -* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, -* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE -* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. -******************************************************************************/ - - -#endif diff --git a/lib/lua/lua.hpp b/lib/lua/lua.hpp deleted file mode 100644 index 2853364..0000000 --- a/lib/lua/lua.hpp +++ /dev/null @@ -1,10 +0,0 @@ -// lua.hpp -// Lua header files for C++ -// 'extern "C" not supplied automatically in lua.h and other headers -// because Lua also compiles as C++ - -extern "C" { -#include "lua.h" -#include "lualib.h" -#include "lauxlib.h" -} diff --git a/lib/lua/luac.c b/lib/lua/luac.c deleted file mode 100644 index 4a2016a..0000000 --- a/lib/lua/luac.c +++ /dev/null @@ -1,733 +0,0 @@ -/* -** $Id: luac.c $ -** Lua compiler (saves bytecodes to files; also lists bytecodes) -** See Copyright Notice in lua.h -*/ - -#define luac_c -#define LUA_CORE - -#include "lprefix.h" - -#include -#include -#include -#include -#include - -#include "lua.h" -#include "lauxlib.h" - -#include "lapi.h" -#include "ldebug.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lopnames.h" -#include "lstate.h" -#include "lundump.h" - -static void PrintFunction(const Proto* f, int full); -#define luaU_print PrintFunction - -#define PROGNAME "luac" /* default program name */ -#define OUTPUT PROGNAME ".out" /* default output file */ - -static int listing=0; /* list bytecodes? */ -static int dumping=1; /* dump bytecodes? */ -static int stripping=0; /* strip debug information? */ -static char Output[]={ OUTPUT }; /* default output file name */ -static const char* output=Output; /* actual output file name */ -static const char* progname=PROGNAME; /* actual program name */ -static TString **tmname; - -static void fatal(const char* message) -{ - fprintf(stderr,"%s: %s\n",progname,message); - exit(EXIT_FAILURE); -} - -static void cannot(const char* what) -{ - fprintf(stderr,"%s: cannot %s %s: %s\n",progname,what,output,strerror(errno)); - exit(EXIT_FAILURE); -} - -static void usage(const char* message) -{ - if (*message=='-') - fprintf(stderr,"%s: unrecognized option '%s'\n",progname,message); - else - fprintf(stderr,"%s: %s\n",progname,message); - fprintf(stderr, - "usage: %s [options] [filenames]\n" - "Available options are:\n" - " -l list (use -l -l for full listing)\n" - " -o name output to file 'name' (default is \"%s\")\n" - " -p parse only\n" - " -s strip debug information\n" - " -v show version information\n" - " -- stop handling options\n" - " - stop handling options and process stdin\n" - ,progname,Output); - exit(EXIT_FAILURE); -} - -#define IS(s) (strcmp(argv[i],s)==0) - -static int doargs(int argc, char* argv[]) -{ - int i; - int version=0; - if (argv[0]!=NULL && *argv[0]!=0) progname=argv[0]; - for (i=1; itop.p+(i))) - -static const Proto* combine(lua_State* L, int n) -{ - if (n==1) - return toproto(L,-1); - else - { - Proto* f; - int i=n; - if (lua_load(L,reader,&i,"=(" PROGNAME ")",NULL)!=LUA_OK) fatal(lua_tostring(L,-1)); - f=toproto(L,-1); - for (i=0; ip[i]=toproto(L,i-n-1); - if (f->p[i]->sizeupvalues>0) f->p[i]->upvalues[0].instack=0; - } - return f; - } -} - -static int writer(lua_State* L, const void* p, size_t size, void* u) -{ - UNUSED(L); - return (fwrite(p,size,1,(FILE*)u)!=1) && (size!=0); -} - -static int pmain(lua_State* L) -{ - int argc=(int)lua_tointeger(L,1); - char** argv=(char**)lua_touserdata(L,2); - const Proto* f; - int i; - tmname=G(L)->tmname; - if (!lua_checkstack(L,argc)) fatal("too many input files"); - for (i=0; i1); - if (dumping) - { - FILE* D= (output==NULL) ? stdout : fopen(output,"wb"); - if (D==NULL) cannot("open"); - lua_lock(L); - luaU_dump(L,f,writer,D,stripping); - lua_unlock(L); - if (ferror(D)) cannot("write"); - if (fclose(D)) cannot("close"); - } - return 0; -} - -int main(int argc, char* argv[]) -{ - lua_State* L; - int i=doargs(argc,argv); - argc-=i; argv+=i; - if (argc<=0) usage("no input files given"); - L=luaL_newstate(); - if (L==NULL) fatal("cannot create state: not enough memory"); - lua_pushcfunction(L,&pmain); - lua_pushinteger(L,argc); - lua_pushlightuserdata(L,argv); - if (lua_pcall(L,2,0,0)!=LUA_OK) fatal(lua_tostring(L,-1)); - lua_close(L); - return EXIT_SUCCESS; -} - -/* -** print bytecodes -*/ - -#define UPVALNAME(x) ((f->upvalues[x].name) ? getstr(f->upvalues[x].name) : "-") -#define VOID(p) ((const void*)(p)) -#define eventname(i) (getstr(tmname[i])) - -static void PrintString(const TString* ts) -{ - const char* s=getstr(ts); - size_t i,n=tsslen(ts); - printf("\""); - for (i=0; ik[i]; - switch (ttypetag(o)) - { - case LUA_VNIL: - printf("N"); - break; - case LUA_VFALSE: - case LUA_VTRUE: - printf("B"); - break; - case LUA_VNUMFLT: - printf("F"); - break; - case LUA_VNUMINT: - printf("I"); - break; - case LUA_VSHRSTR: - case LUA_VLNGSTR: - printf("S"); - break; - default: /* cannot happen */ - printf("?%d",ttypetag(o)); - break; - } - printf("\t"); -} - -static void PrintConstant(const Proto* f, int i) -{ - const TValue* o=&f->k[i]; - switch (ttypetag(o)) - { - case LUA_VNIL: - printf("nil"); - break; - case LUA_VFALSE: - printf("false"); - break; - case LUA_VTRUE: - printf("true"); - break; - case LUA_VNUMFLT: - { - char buff[100]; - sprintf(buff,LUA_NUMBER_FMT,fltvalue(o)); - printf("%s",buff); - if (buff[strspn(buff,"-0123456789")]=='\0') printf(".0"); - break; - } - case LUA_VNUMINT: - printf(LUA_INTEGER_FMT,ivalue(o)); - break; - case LUA_VSHRSTR: - case LUA_VLNGSTR: - PrintString(tsvalue(o)); - break; - default: /* cannot happen */ - printf("?%d",ttypetag(o)); - break; - } -} - -#define COMMENT "\t; " -#define EXTRAARG GETARG_Ax(code[pc+1]) -#define EXTRAARGC (EXTRAARG*(MAXARG_C+1)) -#define ISK (isk ? "k" : "") - -static void PrintCode(const Proto* f) -{ - const Instruction* code=f->code; - int pc,n=f->sizecode; - for (pc=0; pc0) printf("[%d]\t",line); else printf("[-]\t"); - printf("%-9s\t",opnames[o]); - switch (o) - { - case OP_MOVE: - printf("%d %d",a,b); - break; - case OP_LOADI: - printf("%d %d",a,sbx); - break; - case OP_LOADF: - printf("%d %d",a,sbx); - break; - case OP_LOADK: - printf("%d %d",a,bx); - printf(COMMENT); PrintConstant(f,bx); - break; - case OP_LOADKX: - printf("%d",a); - printf(COMMENT); PrintConstant(f,EXTRAARG); - break; - case OP_LOADFALSE: - printf("%d",a); - break; - case OP_LFALSESKIP: - printf("%d",a); - break; - case OP_LOADTRUE: - printf("%d",a); - break; - case OP_LOADNIL: - printf("%d %d",a,b); - printf(COMMENT "%d out",b+1); - break; - case OP_GETUPVAL: - printf("%d %d",a,b); - printf(COMMENT "%s",UPVALNAME(b)); - break; - case OP_SETUPVAL: - printf("%d %d",a,b); - printf(COMMENT "%s",UPVALNAME(b)); - break; - case OP_GETTABUP: - printf("%d %d %d",a,b,c); - printf(COMMENT "%s",UPVALNAME(b)); - printf(" "); PrintConstant(f,c); - break; - case OP_GETTABLE: - printf("%d %d %d",a,b,c); - break; - case OP_GETI: - printf("%d %d %d",a,b,c); - break; - case OP_GETFIELD: - printf("%d %d %d",a,b,c); - printf(COMMENT); PrintConstant(f,c); - break; - case OP_SETTABUP: - printf("%d %d %d%s",a,b,c,ISK); - printf(COMMENT "%s",UPVALNAME(a)); - printf(" "); PrintConstant(f,b); - if (isk) { printf(" "); PrintConstant(f,c); } - break; - case OP_SETTABLE: - printf("%d %d %d%s",a,b,c,ISK); - if (isk) { printf(COMMENT); PrintConstant(f,c); } - break; - case OP_SETI: - printf("%d %d %d%s",a,b,c,ISK); - if (isk) { printf(COMMENT); PrintConstant(f,c); } - break; - case OP_SETFIELD: - printf("%d %d %d%s",a,b,c,ISK); - printf(COMMENT); PrintConstant(f,b); - if (isk) { printf(" "); PrintConstant(f,c); } - break; - case OP_NEWTABLE: - printf("%d %d %d%s",a,vb,vc,ISK); - printf(COMMENT "%d",vc+EXTRAARGC); - break; - case OP_SELF: - printf("%d %d %d%s",a,b,c,ISK); - if (isk) { printf(COMMENT); PrintConstant(f,c); } - break; - case OP_ADDI: - printf("%d %d %d",a,b,sc); - break; - case OP_ADDK: - printf("%d %d %d",a,b,c); - printf(COMMENT); PrintConstant(f,c); - break; - case OP_SUBK: - printf("%d %d %d",a,b,c); - printf(COMMENT); PrintConstant(f,c); - break; - case OP_MULK: - printf("%d %d %d",a,b,c); - printf(COMMENT); PrintConstant(f,c); - break; - case OP_MODK: - printf("%d %d %d",a,b,c); - printf(COMMENT); PrintConstant(f,c); - break; - case OP_POWK: - printf("%d %d %d",a,b,c); - printf(COMMENT); PrintConstant(f,c); - break; - case OP_DIVK: - printf("%d %d %d",a,b,c); - printf(COMMENT); PrintConstant(f,c); - break; - case OP_IDIVK: - printf("%d %d %d",a,b,c); - printf(COMMENT); PrintConstant(f,c); - break; - case OP_BANDK: - printf("%d %d %d",a,b,c); - printf(COMMENT); PrintConstant(f,c); - break; - case OP_BORK: - printf("%d %d %d",a,b,c); - printf(COMMENT); PrintConstant(f,c); - break; - case OP_BXORK: - printf("%d %d %d",a,b,c); - printf(COMMENT); PrintConstant(f,c); - break; - case OP_SHLI: - printf("%d %d %d",a,b,sc); - break; - case OP_SHRI: - printf("%d %d %d",a,b,sc); - break; - case OP_ADD: - printf("%d %d %d",a,b,c); - break; - case OP_SUB: - printf("%d %d %d",a,b,c); - break; - case OP_MUL: - printf("%d %d %d",a,b,c); - break; - case OP_MOD: - printf("%d %d %d",a,b,c); - break; - case OP_POW: - printf("%d %d %d",a,b,c); - break; - case OP_DIV: - printf("%d %d %d",a,b,c); - break; - case OP_IDIV: - printf("%d %d %d",a,b,c); - break; - case OP_BAND: - printf("%d %d %d",a,b,c); - break; - case OP_BOR: - printf("%d %d %d",a,b,c); - break; - case OP_BXOR: - printf("%d %d %d",a,b,c); - break; - case OP_SHL: - printf("%d %d %d",a,b,c); - break; - case OP_SHR: - printf("%d %d %d",a,b,c); - break; - case OP_MMBIN: - printf("%d %d %d",a,b,c); - printf(COMMENT "%s",eventname(c)); - break; - case OP_MMBINI: - printf("%d %d %d %d",a,sb,c,isk); - printf(COMMENT "%s",eventname(c)); - if (isk) printf(" flip"); - break; - case OP_MMBINK: - printf("%d %d %d %d",a,b,c,isk); - printf(COMMENT "%s ",eventname(c)); PrintConstant(f,b); - if (isk) printf(" flip"); - break; - case OP_UNM: - printf("%d %d",a,b); - break; - case OP_BNOT: - printf("%d %d",a,b); - break; - case OP_NOT: - printf("%d %d",a,b); - break; - case OP_LEN: - printf("%d %d",a,b); - break; - case OP_CONCAT: - printf("%d %d",a,b); - break; - case OP_CLOSE: - printf("%d",a); - break; - case OP_TBC: - printf("%d",a); - break; - case OP_JMP: - printf("%d",GETARG_sJ(i)); - printf(COMMENT "to %d",GETARG_sJ(i)+pc+2); - break; - case OP_EQ: - printf("%d %d %d",a,b,isk); - break; - case OP_LT: - printf("%d %d %d",a,b,isk); - break; - case OP_LE: - printf("%d %d %d",a,b,isk); - break; - case OP_EQK: - printf("%d %d %d",a,b,isk); - printf(COMMENT); PrintConstant(f,b); - break; - case OP_EQI: - printf("%d %d %d",a,sb,isk); - break; - case OP_LTI: - printf("%d %d %d",a,sb,isk); - break; - case OP_LEI: - printf("%d %d %d",a,sb,isk); - break; - case OP_GTI: - printf("%d %d %d",a,sb,isk); - break; - case OP_GEI: - printf("%d %d %d",a,sb,isk); - break; - case OP_TEST: - printf("%d %d",a,isk); - break; - case OP_TESTSET: - printf("%d %d %d",a,b,isk); - break; - case OP_CALL: - printf("%d %d %d",a,b,c); - printf(COMMENT); - if (b==0) printf("all in "); else printf("%d in ",b-1); - if (c==0) printf("all out"); else printf("%d out",c-1); - break; - case OP_TAILCALL: - printf("%d %d %d%s",a,b,c,ISK); - printf(COMMENT "%d in",b-1); - break; - case OP_RETURN: - printf("%d %d %d%s",a,b,c,ISK); - printf(COMMENT); - if (b==0) printf("all out"); else printf("%d out",b-1); - break; - case OP_RETURN0: - break; - case OP_RETURN1: - printf("%d",a); - break; - case OP_FORLOOP: - printf("%d %d",a,bx); - printf(COMMENT "to %d",pc-bx+2); - break; - case OP_FORPREP: - printf("%d %d",a,bx); - printf(COMMENT "exit to %d",pc+bx+3); - break; - case OP_TFORPREP: - printf("%d %d",a,bx); - printf(COMMENT "to %d",pc+bx+2); - break; - case OP_TFORCALL: - printf("%d %d",a,c); - break; - case OP_TFORLOOP: - printf("%d %d",a,bx); - printf(COMMENT "to %d",pc-bx+2); - break; - case OP_SETLIST: - printf("%d %d %d%s",a,vb,vc,ISK); - if (isk) printf(COMMENT "%d",c+EXTRAARGC); - break; - case OP_CLOSURE: - printf("%d %d",a,bx); - printf(COMMENT "%p",VOID(f->p[bx])); - break; - case OP_VARARG: - printf("%d %d %d%s",a,b,c,ISK); - printf(COMMENT); - if (c==0) printf("all out"); else printf("%d out",c-1); - break; - case OP_GETVARG: - printf("%d %d %d",a,b,c); - break; - case OP_ERRNNIL: - printf("%d %d",a,bx); - printf(COMMENT); - if (bx==0) printf("?"); else PrintConstant(f,bx-1); - break; - case OP_VARARGPREP: - printf("%d",a); - break; - case OP_EXTRAARG: - printf("%d",ax); - break; -#if 0 - default: - printf("%d %d %d",a,b,c); - printf(COMMENT "not handled"); - break; -#endif - } - printf("\n"); - } -} - -#define SS(x) ((x==1)?"":"s") -#define S(x) (int)(x),SS(x) - -static void PrintHeader(const Proto* f) -{ - const char* s=f->source ? getstr(f->source) : "=?"; - if (*s=='@' || *s=='=') - s++; - else if (*s==LUA_SIGNATURE[0]) - s="(bstring)"; - else - s="(string)"; - printf("\n%s <%s:%d,%d> (%d instruction%s at %p)\n", - (f->linedefined==0)?"main":"function",s, - f->linedefined,f->lastlinedefined, - S(f->sizecode),VOID(f)); - printf("%d%s param%s, %d slot%s, %d upvalue%s, ", - (int)(f->numparams),isvararg(f)?"+":"",SS(f->numparams), - S(f->maxstacksize),S(f->sizeupvalues)); - printf("%d local%s, %d constant%s, %d function%s\n", - S(f->sizelocvars),S(f->sizek),S(f->sizep)); -} - -static void PrintDebug(const Proto* f) -{ - int i,n; - n=f->sizek; - printf("constants (%d) for %p:\n",n,VOID(f)); - for (i=0; isizelocvars; - printf("locals (%d) for %p:\n",n,VOID(f)); - for (i=0; ilocvars[i].varname),f->locvars[i].startpc+1,f->locvars[i].endpc+1); - } - n=f->sizeupvalues; - printf("upvalues (%d) for %p:\n",n,VOID(f)); - for (i=0; iupvalues[i].instack,f->upvalues[i].idx); - } -} - -static void PrintFunction(const Proto* f, int full) -{ - int i,n=f->sizep; - PrintHeader(f); - PrintCode(f); - if (full) PrintDebug(f); - for (i=0; ip[i],full); -} diff --git a/lib/lua/luaconf.h b/lib/lua/luaconf.h deleted file mode 100644 index 9683cba..0000000 --- a/lib/lua/luaconf.h +++ /dev/null @@ -1,756 +0,0 @@ -/* -** $Id: luaconf.h $ -** Configuration file for Lua -** See Copyright Notice in lua.h -*/ - - -#ifndef luaconf_h -#define luaconf_h - -#include -#include - - -/* -** =================================================================== -** General Configuration File for Lua -** -** Some definitions here can be changed externally, through the compiler -** (e.g., with '-D' options): They are commented out or protected -** by '#if !defined' guards. However, several other definitions -** should be changed directly here, either because they affect the -** Lua ABI (by making the changes here, you ensure that all software -** connected to Lua, such as C libraries, will be compiled with the same -** configuration); or because they are seldom changed. -** -** Search for "@@" to find all configurable definitions. -** =================================================================== -*/ - - -/* -** {==================================================================== -** System Configuration: macros to adapt (if needed) Lua to some -** particular platform, for instance restricting it to C89. -** ===================================================================== -*/ - -/* -@@ LUA_USE_C89 controls the use of non-ISO-C89 features. -** Define it if you want Lua to avoid the use of a few C99 features -** or Windows-specific features on Windows. -*/ -/* #define LUA_USE_C89 */ - - -/* -** By default, Lua on Windows use (some) specific Windows features -*/ -#if !defined(LUA_USE_C89) && defined(_WIN32) && !defined(_WIN32_WCE) -#define LUA_USE_WINDOWS /* enable goodies for regular Windows */ -#endif - - -#if defined(LUA_USE_WINDOWS) -#define LUA_DL_DLL /* enable support for DLL */ -#define LUA_USE_C89 /* broadly, Windows is C89 */ -#endif - - -/* -** When POSIX DLL ('LUA_USE_DLOPEN') is enabled, the Lua stand-alone -** application will try to dynamically link a 'readline' facility -** for its REPL. In that case, LUA_READLINELIB is the name of the -** library it will look for those facilities. If lua.c cannot open -** the specified library, it will generate a warning and then run -** without 'readline'. If that macro is not defined, lua.c will not -** use 'readline'. -*/ -#if defined(LUA_USE_LINUX) -#define LUA_USE_POSIX -#define LUA_USE_DLOPEN /* needs an extra library: -ldl */ -#if !defined(LUA_READLINELIB) -#define LUA_READLINELIB "libreadline.so" -#endif -#endif - - -#if defined(LUA_USE_MACOSX) -#define LUA_USE_POSIX -#define LUA_USE_DLOPEN /* macOS does not need -ldl */ -#define LUA_USE_READLINE /* needs an extra library: -lreadline */ -#endif - - -#if defined(LUA_USE_IOS) -#define LUA_USE_POSIX -#define LUA_USE_DLOPEN -#endif - - -#if defined(LUA_USE_C89) && defined(LUA_USE_POSIX) -#error "POSIX is not compatible with C89" -#endif - - -/* -@@ LUAI_IS32INT is true iff 'int' has (at least) 32 bits. -*/ -#define LUAI_IS32INT ((UINT_MAX >> 30) >= 3) - -/* }================================================================== */ - - - -/* -** {================================================================== -** Configuration for Number types. These options should not be -** set externally, because any other code connected to Lua must -** use the same configuration. -** =================================================================== -*/ - -/* -@@ LUA_INT_TYPE defines the type for Lua integers. -@@ LUA_FLOAT_TYPE defines the type for Lua floats. -** Lua should work fine with any mix of these options supported -** by your C compiler. The usual configurations are 64-bit integers -** and 'double' (the default), 32-bit integers and 'float' (for -** restricted platforms), and 'long'/'double' (for C compilers not -** compliant with C99, which may not have support for 'long long'). -*/ - -/* predefined options for LUA_INT_TYPE */ -#define LUA_INT_INT 1 -#define LUA_INT_LONG 2 -#define LUA_INT_LONGLONG 3 - -/* predefined options for LUA_FLOAT_TYPE */ -#define LUA_FLOAT_FLOAT 1 -#define LUA_FLOAT_DOUBLE 2 -#define LUA_FLOAT_LONGDOUBLE 3 - - -/* Default configuration ('long long' and 'double', for 64-bit Lua) */ -#define LUA_INT_DEFAULT LUA_INT_LONGLONG -#define LUA_FLOAT_DEFAULT LUA_FLOAT_DOUBLE - - -/* -@@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats. -*/ -/* #define LUA_32BITS */ - - -/* -@@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for -** C89 ('long' and 'double'); Windows always has '__int64', so it does -** not need to use this case. -*/ -#if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS) -#define LUA_C89_NUMBERS 1 -#else -#define LUA_C89_NUMBERS 0 -#endif - - -#if defined(LUA_32BITS) /* { */ -/* -** 32-bit integers and 'float' -*/ -#if LUAI_IS32INT /* use 'int' if big enough */ -#define LUA_INT_TYPE LUA_INT_INT -#else /* otherwise use 'long' */ -#define LUA_INT_TYPE LUA_INT_LONG -#endif -#define LUA_FLOAT_TYPE LUA_FLOAT_FLOAT - -#elif LUA_C89_NUMBERS /* }{ */ -/* -** largest types available for C89 ('long' and 'double') -*/ -#define LUA_INT_TYPE LUA_INT_LONG -#define LUA_FLOAT_TYPE LUA_FLOAT_DOUBLE - -#else /* }{ */ -/* use defaults */ - -#define LUA_INT_TYPE LUA_INT_DEFAULT -#define LUA_FLOAT_TYPE LUA_FLOAT_DEFAULT - -#endif /* } */ - - -/* }================================================================== */ - - - -/* -** {================================================================== -** Configuration for Paths. -** =================================================================== -*/ - -/* -** LUA_PATH_SEP is the character that separates templates in a path. -** LUA_PATH_MARK is the string that marks the substitution points in a -** template. -** LUA_EXEC_DIR in a Windows path is replaced by the executable's -** directory. -*/ -#define LUA_PATH_SEP ";" -#define LUA_PATH_MARK "?" -#define LUA_EXEC_DIR "!" - - -/* -@@ LUA_PATH_DEFAULT is the default path that Lua uses to look for -** Lua libraries. -@@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for -** C libraries. -** CHANGE them if your machine has a non-conventional directory -** hierarchy or if you want to install your libraries in -** non-conventional directories. -*/ - -#define LUA_VDIR LUA_VERSION_MAJOR "." LUA_VERSION_MINOR -#if defined(_WIN32) /* { */ -/* -** In Windows, any exclamation mark ('!') in the path is replaced by the -** path of the directory of the executable file of the current process. -*/ -#define LUA_LDIR "!\\lua\\" -#define LUA_CDIR "!\\" -#define LUA_SHRDIR "!\\..\\share\\lua\\" LUA_VDIR "\\" - -#if !defined(LUA_PATH_DEFAULT) -#define LUA_PATH_DEFAULT \ - LUA_LDIR "?.lua;" LUA_LDIR "?\\init.lua;" \ - LUA_CDIR "?.lua;" LUA_CDIR "?\\init.lua;" \ - LUA_SHRDIR "?.lua;" LUA_SHRDIR "?\\init.lua;" \ - ".\\?.lua;" ".\\?\\init.lua" -#endif - -#if !defined(LUA_CPATH_DEFAULT) -#define LUA_CPATH_DEFAULT \ - LUA_CDIR "?.dll;" \ - LUA_CDIR "..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \ - LUA_CDIR "loadall.dll;" ".\\?.dll" -#endif - -#else /* }{ */ - -#define LUA_ROOT "/usr/local/" -#define LUA_LDIR LUA_ROOT "share/lua/" LUA_VDIR "/" -#define LUA_CDIR LUA_ROOT "lib/lua/" LUA_VDIR "/" - -#if !defined(LUA_PATH_DEFAULT) -#define LUA_PATH_DEFAULT \ - LUA_LDIR "?.lua;" LUA_LDIR "?/init.lua;" \ - LUA_CDIR "?.lua;" LUA_CDIR "?/init.lua;" \ - "./?.lua;" "./?/init.lua" -#endif - -#if !defined(LUA_CPATH_DEFAULT) -#define LUA_CPATH_DEFAULT \ - LUA_CDIR "?.so;" LUA_CDIR "loadall.so;" "./?.so" -#endif - -#endif /* } */ - - -/* -@@ LUA_DIRSEP is the directory separator (for submodules). -** CHANGE it if your machine does not use "/" as the directory separator -** and is not Windows. (On Windows Lua automatically uses "\".) -*/ -#if !defined(LUA_DIRSEP) - -#if defined(_WIN32) -#define LUA_DIRSEP "\\" -#else -#define LUA_DIRSEP "/" -#endif - -#endif - - -/* -** LUA_IGMARK is a mark to ignore all after it when building the -** module name (e.g., used to build the luaopen_ function name). -** Typically, the suffix after the mark is the module version, -** as in "mod-v1.2.so". -*/ -#define LUA_IGMARK "-" - -/* }================================================================== */ - - -/* -** {================================================================== -** Marks for exported symbols in the C code -** =================================================================== -*/ - -/* -@@ LUA_API is a mark for all core API functions. -@@ LUALIB_API is a mark for all auxiliary library functions. -@@ LUAMOD_API is a mark for all standard library opening functions. -** CHANGE them if you need to define those functions in some special way. -** For instance, if you want to create one Windows DLL with the core and -** the libraries, you may want to use the following definition (define -** LUA_BUILD_AS_DLL to get it). -*/ -#if defined(LUA_BUILD_AS_DLL) /* { */ - -#if defined(LUA_CORE) || defined(LUA_LIB) /* { */ -#define LUA_API __declspec(dllexport) -#else /* }{ */ -#define LUA_API __declspec(dllimport) -#endif /* } */ - -#else /* }{ */ - -#define LUA_API extern - -#endif /* } */ - - -/* -** More often than not the libs go together with the core. -*/ -#define LUALIB_API LUA_API - -#if defined(__cplusplus) -/* Lua uses the "C name" when calling open functions */ -#define LUAMOD_API extern "C" -#else -#define LUAMOD_API LUA_API -#endif - -/* }================================================================== */ - - -/* -** {================================================================== -** Compatibility with previous versions -** =================================================================== -*/ - -/* -@@ LUA_COMPAT_GLOBAL avoids 'global' being a reserved word -*/ -#if !defined(LUA_COMPAT_GLOBAL) -#define LUA_COMPAT_GLOBAL 1 -#endif - - -/* -@@ LUA_COMPAT_MATHLIB controls the presence of several deprecated -** functions in the mathematical library. -** (These functions were already officially removed in 5.3; -** nevertheless they are still available here.) -*/ -/* #define LUA_COMPAT_MATHLIB */ - - -/* -@@ The following macros supply trivial compatibility for some -** changes in the API. The macros themselves document how to -** change your code to avoid using them. -** (Once more, these macros were officially removed in 5.3, but they are -** still available here.) -*/ -#define lua_strlen(L,i) lua_rawlen(L, (i)) - -#define lua_objlen(L,i) lua_rawlen(L, (i)) - -#define lua_equal(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPEQ) -#define lua_lessthan(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPLT) - -/* }================================================================== */ - - - -/* -** {================================================================== -** Configuration for Numbers (low-level part). -** Change these definitions if no predefined LUA_FLOAT_* / LUA_INT_* -** satisfy your needs. -** =================================================================== -*/ - -/* -@@ LUAI_UACNUMBER is the result of a 'default argument promotion' -@@ over a floating number. -@@ l_floatatt(x) corrects float attribute 'x' to the proper float type -** by prefixing it with one of FLT/DBL/LDBL. -@@ LUA_NUMBER_FRMLEN is the length modifier for writing floats. -@@ LUA_NUMBER_FMT is the format for writing floats with the maximum -** number of digits that respects tostring(tonumber(numeral)) == numeral. -** (That would be floor(log10(2^n)), where n is the number of bits in -** the float mantissa.) -@@ LUA_NUMBER_FMT_N is the format for writing floats with the minimum -** number of digits that ensures tonumber(tostring(number)) == number. -** (That would be LUA_NUMBER_FMT+2.) -@@ l_mathop allows the addition of an 'l' or 'f' to all math operations. -@@ l_floor takes the floor of a float. -@@ lua_str2number converts a decimal numeral to a number. -*/ - - -/* The following definition is good for most cases here */ - -#define l_floor(x) (l_mathop(floor)(x)) - - -/* now the variable definitions */ - -#if LUA_FLOAT_TYPE == LUA_FLOAT_FLOAT /* { single float */ - -#define LUA_NUMBER float - -#define l_floatatt(n) (FLT_##n) - -#define LUAI_UACNUMBER double - -#define LUA_NUMBER_FRMLEN "" -#define LUA_NUMBER_FMT "%.7g" -#define LUA_NUMBER_FMT_N "%.9g" - -#define l_mathop(op) op##f - -#define lua_str2number(s,p) strtof((s), (p)) - - -#elif LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE /* }{ long double */ - -#define LUA_NUMBER long double - -#define l_floatatt(n) (LDBL_##n) - -#define LUAI_UACNUMBER long double - -#define LUA_NUMBER_FRMLEN "L" -#define LUA_NUMBER_FMT "%.19Lg" -#define LUA_NUMBER_FMT_N "%.21Lg" - -#define l_mathop(op) op##l - -#define lua_str2number(s,p) strtold((s), (p)) - -#elif LUA_FLOAT_TYPE == LUA_FLOAT_DOUBLE /* }{ double */ - -#define LUA_NUMBER double - -#define l_floatatt(n) (DBL_##n) - -#define LUAI_UACNUMBER double - -#define LUA_NUMBER_FRMLEN "" -#define LUA_NUMBER_FMT "%.15g" -#define LUA_NUMBER_FMT_N "%.17g" - -#define l_mathop(op) op - -#define lua_str2number(s,p) strtod((s), (p)) - -#else /* }{ */ - -#error "numeric float type not defined" - -#endif /* } */ - - - -/* -@@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER. -@@ LUAI_UACINT is the result of a 'default argument promotion' -@@ over a LUA_INTEGER. -@@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers. -@@ LUA_INTEGER_FMT is the format for writing integers. -@@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER. -@@ LUA_MININTEGER is the minimum value for a LUA_INTEGER. -@@ LUA_MAXUNSIGNED is the maximum value for a LUA_UNSIGNED. -@@ lua_integer2str converts an integer to a string. -*/ - - -/* The following definitions are good for most cases here */ - -#define LUA_INTEGER_FMT "%" LUA_INTEGER_FRMLEN "d" - -#define LUAI_UACINT LUA_INTEGER - -#define lua_integer2str(s,sz,n) \ - l_sprintf((s), sz, LUA_INTEGER_FMT, (LUAI_UACINT)(n)) - -/* -** use LUAI_UACINT here to avoid problems with promotions (which -** can turn a comparison between unsigneds into a signed comparison) -*/ -#define LUA_UNSIGNED unsigned LUAI_UACINT - - -/* now the variable definitions */ - -#if LUA_INT_TYPE == LUA_INT_INT /* { int */ - -#define LUA_INTEGER int -#define LUA_INTEGER_FRMLEN "" - -#define LUA_MAXINTEGER INT_MAX -#define LUA_MININTEGER INT_MIN - -#define LUA_MAXUNSIGNED UINT_MAX - -#elif LUA_INT_TYPE == LUA_INT_LONG /* }{ long */ - -#define LUA_INTEGER long -#define LUA_INTEGER_FRMLEN "l" - -#define LUA_MAXINTEGER LONG_MAX -#define LUA_MININTEGER LONG_MIN - -#define LUA_MAXUNSIGNED ULONG_MAX - -#elif LUA_INT_TYPE == LUA_INT_LONGLONG /* }{ long long */ - -/* use presence of macro LLONG_MAX as proxy for C99 compliance */ -#if defined(LLONG_MAX) /* { */ -/* use ISO C99 stuff */ - -#define LUA_INTEGER long long -#define LUA_INTEGER_FRMLEN "ll" - -#define LUA_MAXINTEGER LLONG_MAX -#define LUA_MININTEGER LLONG_MIN - -#define LUA_MAXUNSIGNED ULLONG_MAX - -#elif defined(LUA_USE_WINDOWS) /* }{ */ -/* in Windows, can use specific Windows types */ - -#define LUA_INTEGER __int64 -#define LUA_INTEGER_FRMLEN "I64" - -#define LUA_MAXINTEGER _I64_MAX -#define LUA_MININTEGER _I64_MIN - -#define LUA_MAXUNSIGNED _UI64_MAX - -#else /* }{ */ - -#error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \ - or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)" - -#endif /* } */ - -#else /* }{ */ - -#error "numeric integer type not defined" - -#endif /* } */ - -/* }================================================================== */ - - -/* -** {================================================================== -** Dependencies with C99 and other C details -** =================================================================== -*/ - -/* -@@ l_sprintf is equivalent to 'snprintf' or 'sprintf' in C89. -** (All uses in Lua have only one format item.) -*/ -#if !defined(LUA_USE_C89) -#define l_sprintf(s,sz,f,i) snprintf(s,sz,f,i) -#else -#define l_sprintf(s,sz,f,i) ((void)(sz), sprintf(s,f,i)) -#endif - - -/* -@@ lua_strx2number converts a hexadecimal numeral to a number. -** In C99, 'strtod' does that conversion. Otherwise, you can -** leave 'lua_strx2number' undefined and Lua will provide its own -** implementation. -*/ -#if !defined(LUA_USE_C89) -#define lua_strx2number(s,p) lua_str2number(s,p) -#endif - - -/* -@@ lua_pointer2str converts a pointer to a readable string in a -** non-specified way. -*/ -#define lua_pointer2str(buff,sz,p) l_sprintf(buff,sz,"%p",p) - - -/* -@@ lua_number2strx converts a float to a hexadecimal numeral. -** In C99, 'sprintf' (with format specifiers '%a'/'%A') does that. -** Otherwise, you can leave 'lua_number2strx' undefined and Lua will -** provide its own implementation. -*/ -#if !defined(LUA_USE_C89) -#define lua_number2strx(L,b,sz,f,n) \ - ((void)L, l_sprintf(b,sz,f,(LUAI_UACNUMBER)(n))) -#endif - - -/* -** 'strtof' and 'opf' variants for math functions are not valid in -** C89. Otherwise, the macro 'HUGE_VALF' is a good proxy for testing the -** availability of these variants. ('math.h' is already included in -** all files that use these macros.) -*/ -#if defined(LUA_USE_C89) || (defined(HUGE_VAL) && !defined(HUGE_VALF)) -#undef l_mathop /* variants not available */ -#undef lua_str2number -#define l_mathop(op) (lua_Number)op /* no variant */ -#define lua_str2number(s,p) ((lua_Number)strtod((s), (p))) -#endif - - -/* -@@ LUA_KCONTEXT is the type of the context ('ctx') for continuation -** functions. It must be a numerical type; Lua will use 'intptr_t' if -** available, otherwise it will use 'ptrdiff_t' (the nearest thing to -** 'intptr_t' in C89) -*/ -#define LUA_KCONTEXT ptrdiff_t - -#if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \ - __STDC_VERSION__ >= 199901L -#include -#if defined(INTPTR_MAX) /* even in C99 this type is optional */ -#undef LUA_KCONTEXT -#define LUA_KCONTEXT intptr_t -#endif -#endif - - -/* -@@ lua_getlocaledecpoint gets the locale "radix character" (decimal point). -** Change that if you do not want to use C locales. (Code using this -** macro must include the header 'locale.h'.) -*/ -#if !defined(lua_getlocaledecpoint) -#define lua_getlocaledecpoint() (localeconv()->decimal_point[0]) -#endif - - -/* -** macros to improve jump prediction, used mostly for error handling -** and debug facilities. (Some macros in the Lua API use these macros. -** Define LUA_NOBUILTIN if you do not want '__builtin_expect' in your -** code.) -*/ -#if !defined(luai_likely) - -#if !defined(LUA_NOBUILTIN) && defined(__GNUC__) && (__GNUC__ >= 3) -#define luai_likely(x) (__builtin_expect(((x) != 0), 1)) -#define luai_unlikely(x) (__builtin_expect(((x) != 0), 0)) -#else -#define luai_likely(x) (x) -#define luai_unlikely(x) (x) -#endif - -#endif - - - -/* }================================================================== */ - - -/* -** {================================================================== -** Language Variations -** ===================================================================== -*/ - -/* -@@ LUA_NOCVTN2S/LUA_NOCVTS2N control how Lua performs some -** coercions. Define LUA_NOCVTN2S to turn off automatic coercion from -** numbers to strings. Define LUA_NOCVTS2N to turn off automatic -** coercion from strings to numbers. -*/ -/* #define LUA_NOCVTN2S */ -/* #define LUA_NOCVTS2N */ - - -/* -@@ LUA_USE_APICHECK turns on several consistency checks on the C API. -** Define it as a help when debugging C code. -*/ -/* #define LUA_USE_APICHECK */ - -/* }================================================================== */ - - -/* -** {================================================================== -** Macros that affect the API and must be stable (that is, must be the -** same when you compile Lua and when you compile code that links to -** Lua). -** ===================================================================== -*/ - -/* -@@ LUA_EXTRASPACE defines the size of a raw memory area associated with -** a Lua state with very fast access. -** CHANGE it if you need a different size. -*/ -#define LUA_EXTRASPACE (272) - - -/* -@@ LUA_IDSIZE gives the maximum size for the description of the source -** of a function in debug information. -** CHANGE it if you want a different size. -*/ -#define LUA_IDSIZE 60 - - -/* -@@ LUAL_BUFFERSIZE is the initial buffer size used by the lauxlib -** buffer system. -*/ -#define LUAL_BUFFERSIZE ((int)(16 * sizeof(void*) * sizeof(lua_Number))) - - -/* -@@ LUAI_MAXALIGN defines fields that ensure proper alignment for -** memory areas offered by Lua (e.g., userdata memory). -** Add fields to it if you need alignment for non-ISO objects. -*/ -#if defined(LLONG_MAX) -/* use ISO C99 stuff */ -#define LUAI_MAXALIGN long double u; void *s; long long l -#else -/* use only C89 stuff */ -#define LUAI_MAXALIGN lua_Number n; double u; void *s; lua_Integer i; long l -#endif - -/* }================================================================== */ - - - - - -/* =================================================================== */ - -/* -** Local configuration. You can use this space to add your redefinitions -** without modifying the main part of the file. -*/ - - - -#endif - diff --git a/lib/lua/lualib.h b/lib/lua/lualib.h deleted file mode 100644 index 068f60a..0000000 --- a/lib/lua/lualib.h +++ /dev/null @@ -1,65 +0,0 @@ -/* -** $Id: lualib.h $ -** Lua standard libraries -** See Copyright Notice in lua.h -*/ - - -#ifndef lualib_h -#define lualib_h - -#include "lua.h" - - -/* version suffix for environment variable names */ -#define LUA_VERSUFFIX "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR - -#define LUA_GLIBK 1 -LUAMOD_API int (luaopen_base) (lua_State *L); - -#define LUA_LOADLIBNAME "package" -#define LUA_LOADLIBK (LUA_GLIBK << 1) -LUAMOD_API int (luaopen_package) (lua_State *L); - - -#define LUA_COLIBNAME "coroutine" -#define LUA_COLIBK (LUA_LOADLIBK << 1) -LUAMOD_API int (luaopen_coroutine) (lua_State *L); - -#define LUA_DBLIBNAME "debug" -#define LUA_DBLIBK (LUA_COLIBK << 1) -LUAMOD_API int (luaopen_debug) (lua_State *L); - -#define LUA_IOLIBNAME "io" -#define LUA_IOLIBK (LUA_DBLIBK << 1) -LUAMOD_API int (luaopen_io) (lua_State *L); - -#define LUA_MATHLIBNAME "math" -#define LUA_MATHLIBK (LUA_IOLIBK << 1) -LUAMOD_API int (luaopen_math) (lua_State *L); - -#define LUA_OSLIBNAME "os" -#define LUA_OSLIBK (LUA_MATHLIBK << 1) -LUAMOD_API int (luaopen_os) (lua_State *L); - -#define LUA_STRLIBNAME "string" -#define LUA_STRLIBK (LUA_OSLIBK << 1) -LUAMOD_API int (luaopen_string) (lua_State *L); - -#define LUA_TABLIBNAME "table" -#define LUA_TABLIBK (LUA_STRLIBK << 1) -LUAMOD_API int (luaopen_table) (lua_State *L); - -#define LUA_UTF8LIBNAME "utf8" -#define LUA_UTF8LIBK (LUA_TABLIBK << 1) -LUAMOD_API int (luaopen_utf8) (lua_State *L); - - -/* open selected libraries */ -LUALIB_API void (luaL_openselectedlibs) (lua_State *L, int load, int preload); - -/* open all libraries */ -#define luaL_openlibs(L) luaL_openselectedlibs(L, ~0, 0) - - -#endif diff --git a/lib/lua/lundump.c b/lib/lua/lundump.c deleted file mode 100644 index d5fdc64..0000000 --- a/lib/lua/lundump.c +++ /dev/null @@ -1,421 +0,0 @@ -/* -** $Id: lundump.c $ -** load precompiled Lua chunks -** See Copyright Notice in lua.h -*/ - -#define lundump_c -#define LUA_CORE - -#include "lprefix.h" - - -#include -#include - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lmem.h" -#include "lobject.h" -#include "lstring.h" -#include "ltable.h" -#include "lundump.h" -#include "lzio.h" - - -#if !defined(luai_verifycode) -#define luai_verifycode(L,f) /* empty */ -#endif - - -typedef struct { - lua_State *L; - ZIO *Z; - const char *name; - Table *h; /* list for string reuse */ - size_t offset; /* current position relative to beginning of dump */ - lua_Unsigned nstr; /* number of strings in the list */ - lu_byte fixed; /* dump is fixed in memory */ -} LoadState; - - -static l_noret error (LoadState *S, const char *why) { - luaO_pushfstring(S->L, "%s: bad binary format (%s)", S->name, why); - luaD_throw(S->L, LUA_ERRSYNTAX); -} - - -/* -** All high-level loads go through loadVector; you can change it to -** adapt to the endianness of the input -*/ -#define loadVector(S,b,n) loadBlock(S,b,cast_sizet(n)*sizeof((b)[0])) - -static void loadBlock (LoadState *S, void *b, size_t size) { - if (luaZ_read(S->Z, b, size) != 0) - error(S, "truncated chunk"); - S->offset += size; -} - - -static void loadAlign (LoadState *S, unsigned align) { - unsigned padding = align - cast_uint(S->offset % align); - if (padding < align) { /* (padding == align) means no padding */ - lua_Integer paddingContent; - loadBlock(S, &paddingContent, padding); - lua_assert(S->offset % align == 0); - } -} - - -#define getaddr(S,n,t) cast(t *, getaddr_(S,cast_sizet(n) * sizeof(t))) - -static const void *getaddr_ (LoadState *S, size_t size) { - const void *block = luaZ_getaddr(S->Z, size); - S->offset += size; - if (block == NULL) - error(S, "truncated fixed buffer"); - return block; -} - - -#define loadVar(S,x) loadVector(S,&x,1) - - -static lu_byte loadByte (LoadState *S) { - int b = zgetc(S->Z); - if (b == EOZ) - error(S, "truncated chunk"); - S->offset++; - return cast_byte(b); -} - - -static lua_Unsigned loadVarint (LoadState *S, lua_Unsigned limit) { - lua_Unsigned x = 0; - int b; - limit >>= 7; - do { - b = loadByte(S); - if (x > limit) - error(S, "integer overflow"); - x = (x << 7) | (b & 0x7f); - } while ((b & 0x80) != 0); - return x; -} - - -static size_t loadSize (LoadState *S) { - return cast_sizet(loadVarint(S, MAX_SIZE)); -} - - -static int loadInt (LoadState *S) { - return cast_int(loadVarint(S, cast_sizet(INT_MAX))); -} - - - -static lua_Number loadNumber (LoadState *S) { - lua_Number x; - loadVar(S, x); - return x; -} - - -static lua_Integer loadInteger (LoadState *S) { - lua_Unsigned cx = loadVarint(S, LUA_MAXUNSIGNED); - /* decode unsigned to signed */ - if ((cx & 1) != 0) - return l_castU2S(~(cx >> 1)); - else - return l_castU2S(cx >> 1); -} - - -/* -** Load a nullable string into slot 'sl' from prototype 'p'. The -** assignment to the slot and the barrier must be performed before any -** possible GC activity, to anchor the string. (Both 'loadVector' and -** 'luaH_setint' can call the GC.) -*/ -static void loadString (LoadState *S, Proto *p, TString **sl) { - lua_State *L = S->L; - TString *ts; - TValue sv; - size_t size = loadSize(S); - if (size == 0) { /* previously saved string? */ - lua_Unsigned idx = loadVarint(S, LUA_MAXUNSIGNED); /* get its index */ - TValue stv; - if (idx == 0) { /* no string? */ - lua_assert(*sl == NULL); /* must be prefilled */ - return; - } - if (novariant(luaH_getint(S->h, l_castU2S(idx), &stv)) != LUA_TSTRING) - error(S, "invalid string index"); - *sl = ts = tsvalue(&stv); /* get its value */ - luaC_objbarrier(L, p, ts); - return; /* do not save it again */ - } - else if ((size -= 1) <= LUAI_MAXSHORTLEN) { /* short string? */ - char buff[LUAI_MAXSHORTLEN + 1]; /* extra space for '\0' */ - loadVector(S, buff, size + 1); /* load string into buffer */ - *sl = ts = luaS_newlstr(L, buff, size); /* create string */ - luaC_objbarrier(L, p, ts); - } - else if (S->fixed) { /* for a fixed buffer, use a fixed string */ - const char *s = getaddr(S, size + 1, char); /* get content address */ - *sl = ts = luaS_newextlstr(L, s, size, NULL, NULL); - luaC_objbarrier(L, p, ts); - } - else { /* create internal copy */ - *sl = ts = luaS_createlngstrobj(L, size); /* create string */ - luaC_objbarrier(L, p, ts); - loadVector(S, getlngstr(ts), size + 1); /* load directly in final place */ - } - /* add string to list of saved strings */ - S->nstr++; - setsvalue(L, &sv, ts); - luaH_setint(L, S->h, l_castU2S(S->nstr), &sv); - luaC_objbarrierback(L, obj2gco(S->h), ts); -} - - -static void loadCode (LoadState *S, Proto *f) { - int n = loadInt(S); - loadAlign(S, sizeof(f->code[0])); - if (S->fixed) { - f->code = getaddr(S, n, Instruction); - f->sizecode = n; - } - else { - f->code = luaM_newvectorchecked(S->L, n, Instruction); - f->sizecode = n; - loadVector(S, f->code, n); - } -} - - -static void loadFunction(LoadState *S, Proto *f); - - -static void loadConstants (LoadState *S, Proto *f) { - int i; - int n = loadInt(S); - f->k = luaM_newvectorchecked(S->L, n, TValue); - f->sizek = n; - for (i = 0; i < n; i++) - setnilvalue(&f->k[i]); - for (i = 0; i < n; i++) { - TValue *o = &f->k[i]; - int t = loadByte(S); - switch (t) { - case LUA_VNIL: - setnilvalue(o); - break; - case LUA_VFALSE: - setbfvalue(o); - break; - case LUA_VTRUE: - setbtvalue(o); - break; - case LUA_VNUMFLT: - setfltvalue(o, loadNumber(S)); - break; - case LUA_VNUMINT: - setivalue(o, loadInteger(S)); - break; - case LUA_VSHRSTR: - case LUA_VLNGSTR: { - lua_assert(f->source == NULL); - loadString(S, f, &f->source); /* use 'source' to anchor string */ - if (f->source == NULL) - error(S, "bad format for constant string"); - setsvalue2n(S->L, o, f->source); /* save it in the right place */ - f->source = NULL; - break; - } - default: error(S, "invalid constant"); - } - } -} - - -static void loadProtos (LoadState *S, Proto *f) { - int i; - int n = loadInt(S); - f->p = luaM_newvectorchecked(S->L, n, Proto *); - f->sizep = n; - for (i = 0; i < n; i++) - f->p[i] = NULL; - for (i = 0; i < n; i++) { - f->p[i] = luaF_newproto(S->L); - luaC_objbarrier(S->L, f, f->p[i]); - loadFunction(S, f->p[i]); - } -} - - -/* -** Load the upvalues for a function. The names must be filled first, -** because the filling of the other fields can raise read errors and -** the creation of the error message can call an emergency collection; -** in that case all prototypes must be consistent for the GC. -*/ -static void loadUpvalues (LoadState *S, Proto *f) { - int i; - int n = loadInt(S); - f->upvalues = luaM_newvectorchecked(S->L, n, Upvaldesc); - f->sizeupvalues = n; - for (i = 0; i < n; i++) /* make array valid for GC */ - f->upvalues[i].name = NULL; - for (i = 0; i < n; i++) { /* following calls can raise errors */ - f->upvalues[i].instack = loadByte(S); - f->upvalues[i].idx = loadByte(S); - f->upvalues[i].kind = loadByte(S); - } -} - - -static void loadDebug (LoadState *S, Proto *f) { - int i; - int n = loadInt(S); - if (S->fixed) { - f->lineinfo = getaddr(S, n, ls_byte); - f->sizelineinfo = n; - } - else { - f->lineinfo = luaM_newvectorchecked(S->L, n, ls_byte); - f->sizelineinfo = n; - loadVector(S, f->lineinfo, n); - } - n = loadInt(S); - if (n > 0) { - loadAlign(S, sizeof(int)); - if (S->fixed) { - f->abslineinfo = getaddr(S, n, AbsLineInfo); - f->sizeabslineinfo = n; - } - else { - f->abslineinfo = luaM_newvectorchecked(S->L, n, AbsLineInfo); - f->sizeabslineinfo = n; - loadVector(S, f->abslineinfo, n); - } - } - n = loadInt(S); - f->locvars = luaM_newvectorchecked(S->L, n, LocVar); - f->sizelocvars = n; - for (i = 0; i < n; i++) - f->locvars[i].varname = NULL; - for (i = 0; i < n; i++) { - loadString(S, f, &f->locvars[i].varname); - f->locvars[i].startpc = loadInt(S); - f->locvars[i].endpc = loadInt(S); - } - n = loadInt(S); - if (n != 0) /* does it have debug information? */ - n = f->sizeupvalues; /* must be this many */ - for (i = 0; i < n; i++) - loadString(S, f, &f->upvalues[i].name); -} - - -static void loadFunction (LoadState *S, Proto *f) { - f->linedefined = loadInt(S); - f->lastlinedefined = loadInt(S); - f->numparams = loadByte(S); - /* get only the meaningful flags */ - f->flag = cast_byte(loadByte(S) & ~PF_FIXED); - if (S->fixed) - f->flag |= PF_FIXED; /* signal that code is fixed */ - f->maxstacksize = loadByte(S); - loadCode(S, f); - loadConstants(S, f); - loadUpvalues(S, f); - loadProtos(S, f); - loadString(S, f, &f->source); - loadDebug(S, f); -} - - -static void checkliteral (LoadState *S, const char *s, const char *msg) { - char buff[sizeof(LUA_SIGNATURE) + sizeof(LUAC_DATA)]; /* larger than both */ - size_t len = strlen(s); - loadVector(S, buff, len); - if (memcmp(s, buff, len) != 0) - error(S, msg); -} - - -static l_noret numerror (LoadState *S, const char *what, const char *tname) { - const char *msg = luaO_pushfstring(S->L, "%s %s mismatch", tname, what); - error(S, msg); -} - - -static void checknumsize (LoadState *S, int size, const char *tname) { - if (size != loadByte(S)) - numerror(S, "size", tname); -} - - -static void checknumformat (LoadState *S, int eq, const char *tname) { - if (!eq) - numerror(S, "format", tname); -} - - -#define checknum(S,tvar,value,tname) \ - { tvar i; checknumsize(S, sizeof(i), tname); \ - loadVar(S, i); \ - checknumformat(S, i == value, tname); } - - -static void checkHeader (LoadState *S) { - /* skip 1st char (already read and checked) */ - checkliteral(S, &LUA_SIGNATURE[1], "not a binary chunk"); - if (loadByte(S) != LUAC_VERSION) - error(S, "version mismatch"); - if (loadByte(S) != LUAC_FORMAT) - error(S, "format mismatch"); - checkliteral(S, LUAC_DATA, "corrupted chunk"); - checknum(S, int, LUAC_INT, "int"); - checknum(S, Instruction, LUAC_INST, "instruction"); - checknum(S, lua_Integer, LUAC_INT, "Lua integer"); - checknum(S, lua_Number, LUAC_NUM, "Lua number"); -} - - -/* -** Load precompiled chunk. -*/ -LClosure *luaU_undump (lua_State *L, ZIO *Z, Table *anchor, const char *name, - int fixed) { - LoadState S; - LClosure *cl; - if (*name == '@' || *name == '=') - name = name + 1; - else if (*name == LUA_SIGNATURE[0]) - name = "binary string"; - S.name = name; - S.L = L; - S.Z = Z; - S.fixed = cast_byte(fixed); - S.offset = 1; /* fist byte was already read */ - checkHeader(&S); - S.h = anchor; - S.nstr = 0; - cl = luaF_newLclosure(L, loadByte(&S)); - luaD_anchorobj(L, anchor, obj2gco(cl)); - cl->p = luaF_newproto(L); - luaC_objbarrier(L, cl, cl->p); - loadFunction(&S, cl->p); - if (cl->nupvalues != cl->p->sizeupvalues) - error(&S, "corrupted chunk"); - luai_verifycode(L, cl->p); - return cl; -} - diff --git a/lib/lua/lundump.h b/lib/lua/lundump.h deleted file mode 100644 index 186e25f..0000000 --- a/lib/lua/lundump.h +++ /dev/null @@ -1,40 +0,0 @@ -/* -** $Id: lundump.h $ -** load precompiled Lua chunks -** See Copyright Notice in lua.h -*/ - -#ifndef lundump_h -#define lundump_h - -#include - -#include "llimits.h" -#include "lobject.h" -#include "lzio.h" - - -/* data to catch conversion errors */ -#define LUAC_DATA "\x19\x93\r\n\x1a\n" - -#define LUAC_INT -0x5678 -#define LUAC_INST 0x12345678 -#define LUAC_NUM cast_num(-370.5) - -/* -** Encode major-minor version in one byte, one nibble for each -*/ -#define LUAC_VERSION (LUA_VERSION_MAJOR_N*16+LUA_VERSION_MINOR_N) - -#define LUAC_FORMAT 0 /* this is the official format */ - - -/* load one chunk; from lundump.c */ -LUAI_FUNC LClosure* luaU_undump (lua_State* L, ZIO* Z, Table *anchor, - const char* name, int fixed); - -/* dump one chunk; from ldump.c */ -LUAI_FUNC int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, - void* data, int strip); - -#endif diff --git a/lib/lua/lutf8lib.c b/lib/lua/lutf8lib.c deleted file mode 100644 index 0cd7f9c..0000000 --- a/lib/lua/lutf8lib.c +++ /dev/null @@ -1,294 +0,0 @@ -/* -** $Id: lutf8lib.c $ -** Standard library for UTF-8 manipulation -** See Copyright Notice in lua.h -*/ - -#define lutf8lib_c -#define LUA_LIB - -#include "lprefix.h" - - -#include -#include -#include - -#include "lua.h" - -#include "lauxlib.h" -#include "lualib.h" -#include "llimits.h" - - -#define MAXUNICODE 0x10FFFFu - -#define MAXUTF 0x7FFFFFFFu - - -#define MSGInvalid "invalid UTF-8 code" - - -#define iscont(c) (((c) & 0xC0) == 0x80) -#define iscontp(p) iscont(*(p)) - - -/* from strlib */ -/* translate a relative string position: negative means back from end */ -static lua_Integer u_posrelat (lua_Integer pos, size_t len) { - if (pos >= 0) return pos; - else if (0u - (size_t)pos > len) return 0; - else return (lua_Integer)len + pos + 1; -} - - -/* -** Decode one UTF-8 sequence, returning NULL if byte sequence is -** invalid. The array 'limits' stores the minimum value for each -** sequence length, to check for overlong representations. Its first -** entry forces an error for non-ASCII bytes with no continuation -** bytes (count == 0). -*/ -static const char *utf8_decode (const char *s, l_uint32 *val, int strict) { - static const l_uint32 limits[] = - {~(l_uint32)0, 0x80, 0x800, 0x10000u, 0x200000u, 0x4000000u}; - unsigned int c = (unsigned char)s[0]; - l_uint32 res = 0; /* final result */ - if (c < 0x80) /* ASCII? */ - res = c; - else if (c >= 0xfe) /* c >= 1111 1110b ? */ - return NULL; /* would need six or more continuation bytes */ - else { - int count = 0; /* to count number of continuation bytes */ - for (; c & 0x40; c <<= 1) { /* while it needs continuation bytes... */ - unsigned int cc = (unsigned char)s[++count]; /* read next byte */ - if (!iscont(cc)) /* not a continuation byte? */ - return NULL; /* invalid byte sequence */ - res = (res << 6) | (cc & 0x3F); /* add lower 6 bits from cont. byte */ - } - lua_assert(count <= 5); - res |= ((l_uint32)(c & 0x7F) << (count * 5)); /* add first byte */ - if (res > MAXUTF || res < limits[count]) - return NULL; /* invalid byte sequence */ - s += count; /* skip continuation bytes read */ - } - if (strict) { - /* check for invalid code points; too large or surrogates */ - if (res > MAXUNICODE || (0xD800u <= res && res <= 0xDFFFu)) - return NULL; - } - if (val) *val = res; - return s + 1; /* +1 to include first byte */ -} - - -/* -** utf8len(s [, i [, j [, lax]]]) --> number of characters that -** start in the range [i,j], or nil + current position if 's' is not -** well formed in that interval -*/ -static int utflen (lua_State *L) { - lua_Integer n = 0; /* counter for the number of characters */ - size_t len; /* string length in bytes */ - const char *s = luaL_checklstring(L, 1, &len); - lua_Integer posi = u_posrelat(luaL_optinteger(L, 2, 1), len); - lua_Integer posj = u_posrelat(luaL_optinteger(L, 3, -1), len); - int lax = lua_toboolean(L, 4); - luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 2, - "initial position out of bounds"); - luaL_argcheck(L, --posj < (lua_Integer)len, 3, - "final position out of bounds"); - while (posi <= posj) { - const char *s1 = utf8_decode(s + posi, NULL, !lax); - if (s1 == NULL) { /* conversion error? */ - luaL_pushfail(L); /* return fail ... */ - lua_pushinteger(L, posi + 1); /* ... and current position */ - return 2; - } - posi = ct_diff2S(s1 - s); - n++; - } - lua_pushinteger(L, n); - return 1; -} - - -/* -** codepoint(s, [i, [j [, lax]]]) -> returns codepoints for all -** characters that start in the range [i,j] -*/ -static int codepoint (lua_State *L) { - size_t len; - const char *s = luaL_checklstring(L, 1, &len); - lua_Integer posi = u_posrelat(luaL_optinteger(L, 2, 1), len); - lua_Integer pose = u_posrelat(luaL_optinteger(L, 3, posi), len); - int lax = lua_toboolean(L, 4); - int n; - const char *se; - luaL_argcheck(L, posi >= 1, 2, "out of bounds"); - luaL_argcheck(L, pose <= (lua_Integer)len, 3, "out of bounds"); - if (posi > pose) return 0; /* empty interval; return no values */ - if (pose - posi >= INT_MAX) /* (lua_Integer -> int) overflow? */ - return luaL_error(L, "string slice too long"); - n = (int)(pose - posi) + 1; /* upper bound for number of returns */ - luaL_checkstack(L, n, "string slice too long"); - n = 0; /* count the number of returns */ - se = s + pose; /* string end */ - for (s += posi - 1; s < se;) { - l_uint32 code; - s = utf8_decode(s, &code, !lax); - if (s == NULL) - return luaL_error(L, MSGInvalid); - lua_pushinteger(L, l_castU2S(code)); - n++; - } - return n; -} - - -static void pushutfchar (lua_State *L, int arg) { - lua_Unsigned code = (lua_Unsigned)luaL_checkinteger(L, arg); - luaL_argcheck(L, code <= MAXUTF, arg, "value out of range"); - lua_pushfstring(L, "%U", cast(unsigned long, code)); -} - - -/* -** utfchar(n1, n2, ...) -> char(n1)..char(n2)... -*/ -static int utfchar (lua_State *L) { - int n = lua_gettop(L); /* number of arguments */ - if (n == 1) /* optimize common case of single char */ - pushutfchar(L, 1); - else { - int i; - luaL_Buffer b; - luaL_buffinit(L, &b); - for (i = 1; i <= n; i++) { - pushutfchar(L, i); - luaL_addvalue(&b); - } - luaL_pushresult(&b); - } - return 1; -} - - -/* -** offset(s, n, [i]) -> indices where n-th character counting from -** position 'i' starts and ends; 0 means character at 'i'. -*/ -static int byteoffset (lua_State *L) { - size_t len; - const char *s = luaL_checklstring(L, 1, &len); - lua_Integer n = luaL_checkinteger(L, 2); - lua_Integer posi = (n >= 0) ? 1 : cast_st2S(len) + 1; - posi = u_posrelat(luaL_optinteger(L, 3, posi), len); - luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 3, - "position out of bounds"); - if (n == 0) { - /* find beginning of current byte sequence */ - while (posi > 0 && iscontp(s + posi)) posi--; - } - else { - if (iscontp(s + posi)) - return luaL_error(L, "initial position is a continuation byte"); - if (n < 0) { - while (n < 0 && posi > 0) { /* move back */ - do { /* find beginning of previous character */ - posi--; - } while (posi > 0 && iscontp(s + posi)); - n++; - } - } - else { - n--; /* do not move for 1st character */ - while (n > 0 && posi < (lua_Integer)len) { - do { /* find beginning of next character */ - posi++; - } while (iscontp(s + posi)); /* (cannot pass final '\0') */ - n--; - } - } - } - if (n != 0) { /* did not find given character? */ - luaL_pushfail(L); - return 1; - } - lua_pushinteger(L, posi + 1); /* initial position */ - if ((s[posi] & 0x80) != 0) { /* multi-byte character? */ - if (iscont(s[posi])) - return luaL_error(L, "initial position is a continuation byte"); - while (iscontp(s + posi + 1)) - posi++; /* skip to last continuation byte */ - } - /* else one-byte character: final position is the initial one */ - lua_pushinteger(L, posi + 1); /* 'posi' now is the final position */ - return 2; -} - - -static int iter_aux (lua_State *L, int strict) { - size_t len; - const char *s = luaL_checklstring(L, 1, &len); - lua_Unsigned n = (lua_Unsigned)lua_tointeger(L, 2); - if (n < len) { - while (iscontp(s + n)) n++; /* go to next character */ - } - if (n >= len) /* (also handles original 'n' being negative) */ - return 0; /* no more codepoints */ - else { - l_uint32 code; - const char *next = utf8_decode(s + n, &code, strict); - if (next == NULL || iscontp(next)) - return luaL_error(L, MSGInvalid); - lua_pushinteger(L, l_castU2S(n + 1)); - lua_pushinteger(L, l_castU2S(code)); - return 2; - } -} - - -static int iter_auxstrict (lua_State *L) { - return iter_aux(L, 1); -} - -static int iter_auxlax (lua_State *L) { - return iter_aux(L, 0); -} - - -static int iter_codes (lua_State *L) { - int lax = lua_toboolean(L, 2); - const char *s = luaL_checkstring(L, 1); - luaL_argcheck(L, !iscontp(s), 1, MSGInvalid); - lua_pushcfunction(L, lax ? iter_auxlax : iter_auxstrict); - lua_pushvalue(L, 1); - lua_pushinteger(L, 0); - return 3; -} - - -/* pattern to match a single UTF-8 character */ -#define UTF8PATT "[\0-\x7F\xC2-\xFD][\x80-\xBF]*" - - -static const luaL_Reg funcs[] = { - {"offset", byteoffset}, - {"codepoint", codepoint}, - {"char", utfchar}, - {"len", utflen}, - {"codes", iter_codes}, - /* placeholders */ - {"charpattern", NULL}, - {NULL, NULL} -}; - - -LUAMOD_API int luaopen_utf8 (lua_State *L) { - luaL_newlib(L, funcs); - lua_pushlstring(L, UTF8PATT, sizeof(UTF8PATT)/sizeof(char) - 1); - lua_setfield(L, -2, "charpattern"); - return 1; -} - diff --git a/lib/lua/lvm.c b/lib/lua/lvm.c deleted file mode 100644 index 986c7db..0000000 --- a/lib/lua/lvm.c +++ /dev/null @@ -1,1978 +0,0 @@ -/* -** $Id: lvm.c $ -** Lua virtual machine -** See Copyright Notice in lua.h -*/ - -#define lvm_c -#define LUA_CORE - -#include "lprefix.h" - -#include -#include -#include -#include -#include -#include - -#include "lua.h" - -#include "lapi.h" -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lgc.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" -#include "lvm.h" - - -/* -** By default, use jump tables in the main interpreter loop on gcc -** and compatible compilers. -*/ -#if !defined(LUA_USE_JUMPTABLE) -#if defined(__GNUC__) -#define LUA_USE_JUMPTABLE 1 -#else -#define LUA_USE_JUMPTABLE 0 -#endif -#endif - - - -/* limit for table tag-method chains (to avoid infinite loops) */ -#define MAXTAGLOOP 2000 - - -/* -** 'l_intfitsf' checks whether a given integer is in the range that -** can be converted to a float without rounding. Used in comparisons. -*/ - -/* number of bits in the mantissa of a float */ -#define NBM (l_floatatt(MANT_DIG)) - -/* -** Check whether some integers may not fit in a float, testing whether -** (maxinteger >> NBM) > 0. (That implies (1 << NBM) <= maxinteger.) -** (The shifts are done in parts, to avoid shifting by more than the size -** of an integer. In a worst case, NBM == 113 for long double and -** sizeof(long) == 32.) -*/ -#if ((((LUA_MAXINTEGER >> (NBM / 4)) >> (NBM / 4)) >> (NBM / 4)) \ - >> (NBM - (3 * (NBM / 4)))) > 0 - -/* limit for integers that fit in a float */ -#define MAXINTFITSF ((lua_Unsigned)1 << NBM) - -/* check whether 'i' is in the interval [-MAXINTFITSF, MAXINTFITSF] */ -#define l_intfitsf(i) ((MAXINTFITSF + l_castS2U(i)) <= (2 * MAXINTFITSF)) - -#else /* all integers fit in a float precisely */ - -#define l_intfitsf(i) 1 - -#endif - - -/* -** Try to convert a value from string to a number value. -** If the value is not a string or is a string not representing -** a valid numeral (or if coercions from strings to numbers -** are disabled via macro 'cvt2num'), do not modify 'result' -** and return 0. -*/ -static int l_strton (const TValue *obj, TValue *result) { - lua_assert(obj != result); - if (!cvt2num(obj)) /* is object not a string? */ - return 0; - else { - TString *st = tsvalue(obj); - size_t stlen; - const char *s = getlstr(st, stlen); - return (luaO_str2num(s, result) == stlen + 1); - } -} - - -/* -** Try to convert a value to a float. The float case is already handled -** by the macro 'tonumber'. -*/ -int luaV_tonumber_ (const TValue *obj, lua_Number *n) { - TValue v; - if (ttisinteger(obj)) { - *n = cast_num(ivalue(obj)); - return 1; - } - else if (l_strton(obj, &v)) { /* string coercible to number? */ - *n = nvalue(&v); /* convert result of 'luaO_str2num' to a float */ - return 1; - } - else - return 0; /* conversion failed */ -} - - -/* -** try to convert a float to an integer, rounding according to 'mode'. -*/ -int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode) { - lua_Number f = l_floor(n); - if (n != f) { /* not an integral value? */ - if (mode == F2Ieq) return 0; /* fails if mode demands integral value */ - else if (mode == F2Iceil) /* needs ceiling? */ - f += 1; /* convert floor to ceiling (remember: n != f) */ - } - return lua_numbertointeger(f, p); -} - - -/* -** try to convert a value to an integer, rounding according to 'mode', -** without string coercion. -** ("Fast track" handled by macro 'tointegerns'.) -*/ -int luaV_tointegerns (const TValue *obj, lua_Integer *p, F2Imod mode) { - if (ttisfloat(obj)) - return luaV_flttointeger(fltvalue(obj), p, mode); - else if (ttisinteger(obj)) { - *p = ivalue(obj); - return 1; - } - else - return 0; -} - - -/* -** try to convert a value to an integer. -*/ -int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode) { - TValue v; - if (l_strton(obj, &v)) /* does 'obj' point to a numerical string? */ - obj = &v; /* change it to point to its corresponding number */ - return luaV_tointegerns(obj, p, mode); -} - - -/* -** Try to convert a 'for' limit to an integer, preserving the semantics -** of the loop. Return true if the loop must not run; otherwise, '*p' -** gets the integer limit. -** (The following explanation assumes a positive step; it is valid for -** negative steps mutatis mutandis.) -** If the limit is an integer or can be converted to an integer, -** rounding down, that is the limit. -** Otherwise, check whether the limit can be converted to a float. If -** the float is too large, clip it to LUA_MAXINTEGER. If the float -** is too negative, the loop should not run, because any initial -** integer value is greater than such limit; so, the function returns -** true to signal that. (For this latter case, no integer limit would be -** correct; even a limit of LUA_MININTEGER would run the loop once for -** an initial value equal to LUA_MININTEGER.) -*/ -static int forlimit (lua_State *L, lua_Integer init, const TValue *lim, - lua_Integer *p, lua_Integer step) { - if (!luaV_tointeger(lim, p, (step < 0 ? F2Iceil : F2Ifloor))) { - /* not coercible to in integer */ - lua_Number flim; /* try to convert to float */ - if (!tonumber(lim, &flim)) /* cannot convert to float? */ - luaG_forerror(L, lim, "limit"); - /* else 'flim' is a float out of integer bounds */ - if (luai_numlt(0, flim)) { /* if it is positive, it is too large */ - if (step < 0) return 1; /* initial value must be less than it */ - *p = LUA_MAXINTEGER; /* truncate */ - } - else { /* it is less than min integer */ - if (step > 0) return 1; /* initial value must be greater than it */ - *p = LUA_MININTEGER; /* truncate */ - } - } - return (step > 0 ? init > *p : init < *p); /* not to run? */ -} - - -/* -** Prepare a numerical for loop (opcode OP_FORPREP). -** Before execution, stack is as follows: -** ra : initial value -** ra + 1 : limit -** ra + 2 : step -** Return true to skip the loop. Otherwise, -** after preparation, stack will be as follows: -** ra : loop counter (integer loops) or limit (float loops) -** ra + 1 : step -** ra + 2 : control variable -*/ -static int forprep (lua_State *L, StkId ra) { - TValue *pinit = s2v(ra); - TValue *plimit = s2v(ra + 1); - TValue *pstep = s2v(ra + 2); - if (ttisinteger(pinit) && ttisinteger(pstep)) { /* integer loop? */ - lua_Integer init = ivalue(pinit); - lua_Integer step = ivalue(pstep); - lua_Integer limit; - if (step == 0) - luaG_runerror(L, "'for' step is zero"); - if (forlimit(L, init, plimit, &limit, step)) - return 1; /* skip the loop */ - else { /* prepare loop counter */ - lua_Unsigned count; - if (step > 0) { /* ascending loop? */ - count = l_castS2U(limit) - l_castS2U(init); - if (step != 1) /* avoid division in the too common case */ - count /= l_castS2U(step); - } - else { /* step < 0; descending loop */ - count = l_castS2U(init) - l_castS2U(limit); - /* 'step+1' avoids negating 'mininteger' */ - count /= l_castS2U(-(step + 1)) + 1u; - } - /* use 'chgivalue' for places that for sure had integers */ - chgivalue(s2v(ra), l_castU2S(count)); /* change init to count */ - setivalue(s2v(ra + 1), step); /* change limit to step */ - chgivalue(s2v(ra + 2), init); /* change step to init */ - } - } - else { /* try making all values floats */ - lua_Number init; lua_Number limit; lua_Number step; - if (l_unlikely(!tonumber(plimit, &limit))) - luaG_forerror(L, plimit, "limit"); - if (l_unlikely(!tonumber(pstep, &step))) - luaG_forerror(L, pstep, "step"); - if (l_unlikely(!tonumber(pinit, &init))) - luaG_forerror(L, pinit, "initial value"); - if (step == 0) - luaG_runerror(L, "'for' step is zero"); - if (luai_numlt(0, step) ? luai_numlt(limit, init) - : luai_numlt(init, limit)) - return 1; /* skip the loop */ - else { - /* make sure all values are floats */ - setfltvalue(s2v(ra), limit); - setfltvalue(s2v(ra + 1), step); - setfltvalue(s2v(ra + 2), init); /* control variable */ - } - } - return 0; -} - - -/* -** Execute a step of a float numerical for loop, returning -** true iff the loop must continue. (The integer case is -** written inline with opcode OP_FORLOOP, for performance.) -*/ -static int floatforloop (lua_State *L, StkId ra) { - lua_Number step = fltvalue(s2v(ra + 1)); - lua_Number limit = fltvalue(s2v(ra)); - lua_Number idx = fltvalue(s2v(ra + 2)); /* control variable */ - idx = luai_numadd(L, idx, step); /* increment index */ - if (luai_numlt(0, step) ? luai_numle(idx, limit) - : luai_numle(limit, idx)) { - chgfltvalue(s2v(ra + 2), idx); /* update control variable */ - return 1; /* jump back */ - } - else - return 0; /* finish the loop */ -} - - -/* -** Finish the table access 'val = t[key]' and return the tag of the result. -*/ -lu_byte luaV_finishget (lua_State *L, const TValue *t, TValue *key, - StkId val, lu_byte tag) { - int loop; /* counter to avoid infinite loops */ - const TValue *tm; /* metamethod */ - for (loop = 0; loop < MAXTAGLOOP; loop++) { - if (tag == LUA_VNOTABLE) { /* 't' is not a table? */ - lua_assert(!ttistable(t)); - tm = luaT_gettmbyobj(L, t, TM_INDEX); - if (l_unlikely(notm(tm))) - luaG_typeerror(L, t, "index"); /* no metamethod */ - /* else will try the metamethod */ - } - else { /* 't' is a table */ - tm = fasttm(L, hvalue(t)->metatable, TM_INDEX); /* table's metamethod */ - if (tm == NULL) { /* no metamethod? */ - setnilvalue2s(val); /* result is nil */ - return LUA_VNIL; - } - /* else will try the metamethod */ - } - if (ttisfunction(tm)) { /* is metamethod a function? */ - tag = luaT_callTMres(L, tm, t, key, val); /* call it */ - return tag; /* return tag of the result */ - } - t = tm; /* else try to access 'tm[key]' */ - luaV_fastget(t, key, s2v(val), luaH_get, tag); - if (!tagisempty(tag)) - return tag; /* done */ - /* else repeat (tail call 'luaV_finishget') */ - } - luaG_runerror(L, "'__index' chain too long; possible loop"); - return 0; /* to avoid warnings */ -} - - -/* -** Finish a table assignment 't[key] = val'. -** About anchoring the table before the call to 'luaH_finishset': -** This call may trigger an emergency collection. When loop>0, -** the table being accessed is a field in some metatable. If this -** metatable is weak and the table is not anchored, this collection -** could collect that table while it is being updated. -*/ -void luaV_finishset (lua_State *L, const TValue *t, TValue *key, - TValue *val, int hres) { - int loop; /* counter to avoid infinite loops */ - for (loop = 0; loop < MAXTAGLOOP; loop++) { - const TValue *tm; /* '__newindex' metamethod */ - if (hres != HNOTATABLE) { /* is 't' a table? */ - Table *h = hvalue(t); /* save 't' table */ - tm = fasttm(L, h->metatable, TM_NEWINDEX); /* get metamethod */ - if (tm == NULL) { /* no metamethod? */ - sethvalue2s(L, L->top.p, h); /* anchor 't' */ - L->top.p++; /* assume EXTRA_STACK */ - luaH_finishset(L, h, key, val, hres); /* set new value */ - L->top.p--; - invalidateTMcache(h); - luaC_barrierback(L, obj2gco(h), val); - return; - } - /* else will try the metamethod */ - } - else { /* not a table; check metamethod */ - tm = luaT_gettmbyobj(L, t, TM_NEWINDEX); - if (l_unlikely(notm(tm))) - luaG_typeerror(L, t, "index"); - } - /* try the metamethod */ - if (ttisfunction(tm)) { - luaT_callTM(L, tm, t, key, val); - return; - } - t = tm; /* else must repeat assignment over 'tm' */ - /* do the equivalent to 'luaV_fastset', but saving 'h' */ - if (!ttistable(t)) - hres = HNOTATABLE; - else { - Table *h = hvalue(t); /* next call can change the value at 't' */ - hres = luaH_pset(h, key, val); - if (hres == HOK) { - luaC_barrierback(L, obj2gco(h), val); /* luaV_finishfastset */ - return; /* done */ - } - } - /* else 'return luaV_finishset(L, t, key, val, hres)' (loop) */ - } - luaG_runerror(L, "'__newindex' chain too long; possible loop"); -} - - -/* -** Function to be used for 0-terminated string order comparison -*/ -#if !defined(l_strcoll) -#define l_strcoll strcoll -#endif - - -/* -** Compare two strings 'ts1' x 'ts2', returning an integer less-equal- -** -greater than zero if 'ts1' is less-equal-greater than 'ts2'. -** The code is a little tricky because it allows '\0' in the strings -** and it uses 'strcoll' (to respect locales) for each segment -** of the strings. Note that segments can compare equal but still -** have different lengths. -*/ -static int l_strcmp (const TString *ts1, const TString *ts2) { - size_t rl1; /* real length */ - const char *s1 = getlstr(ts1, rl1); - size_t rl2; - const char *s2 = getlstr(ts2, rl2); - for (;;) { /* for each segment */ - int temp = l_strcoll(s1, s2); - if (temp != 0) /* not equal? */ - return temp; /* done */ - else { /* strings are equal up to a '\0' */ - size_t zl1 = strlen(s1); /* index of first '\0' in 's1' */ - size_t zl2 = strlen(s2); /* index of first '\0' in 's2' */ - if (zl2 == rl2) /* 's2' is finished? */ - return (zl1 == rl1) ? 0 : 1; /* check 's1' */ - else if (zl1 == rl1) /* 's1' is finished? */ - return -1; /* 's1' is less than 's2' ('s2' is not finished) */ - /* both strings longer than 'zl'; go on comparing after the '\0' */ - zl1++; zl2++; - s1 += zl1; rl1 -= zl1; s2 += zl2; rl2 -= zl2; - } - } -} - - -/* -** Check whether integer 'i' is less than float 'f'. If 'i' has an -** exact representation as a float ('l_intfitsf'), compare numbers as -** floats. Otherwise, use the equivalence 'i < f <=> i < ceil(f)'. -** If 'ceil(f)' is out of integer range, either 'f' is greater than -** all integers or less than all integers. -** (The test with 'l_intfitsf' is only for performance; the else -** case is correct for all values, but it is slow due to the conversion -** from float to int.) -** When 'f' is NaN, comparisons must result in false. -*/ -l_sinline int LTintfloat (lua_Integer i, lua_Number f) { - if (l_intfitsf(i)) - return luai_numlt(cast_num(i), f); /* compare them as floats */ - else { /* i < f <=> i < ceil(f) */ - lua_Integer fi; - if (luaV_flttointeger(f, &fi, F2Iceil)) /* fi = ceil(f) */ - return i < fi; /* compare them as integers */ - else /* 'f' is either greater or less than all integers */ - return f > 0; /* greater? */ - } -} - - -/* -** Check whether integer 'i' is less than or equal to float 'f'. -** See comments on previous function. -*/ -l_sinline int LEintfloat (lua_Integer i, lua_Number f) { - if (l_intfitsf(i)) - return luai_numle(cast_num(i), f); /* compare them as floats */ - else { /* i <= f <=> i <= floor(f) */ - lua_Integer fi; - if (luaV_flttointeger(f, &fi, F2Ifloor)) /* fi = floor(f) */ - return i <= fi; /* compare them as integers */ - else /* 'f' is either greater or less than all integers */ - return f > 0; /* greater? */ - } -} - - -/* -** Check whether float 'f' is less than integer 'i'. -** See comments on previous function. -*/ -l_sinline int LTfloatint (lua_Number f, lua_Integer i) { - if (l_intfitsf(i)) - return luai_numlt(f, cast_num(i)); /* compare them as floats */ - else { /* f < i <=> floor(f) < i */ - lua_Integer fi; - if (luaV_flttointeger(f, &fi, F2Ifloor)) /* fi = floor(f) */ - return fi < i; /* compare them as integers */ - else /* 'f' is either greater or less than all integers */ - return f < 0; /* less? */ - } -} - - -/* -** Check whether float 'f' is less than or equal to integer 'i'. -** See comments on previous function. -*/ -l_sinline int LEfloatint (lua_Number f, lua_Integer i) { - if (l_intfitsf(i)) - return luai_numle(f, cast_num(i)); /* compare them as floats */ - else { /* f <= i <=> ceil(f) <= i */ - lua_Integer fi; - if (luaV_flttointeger(f, &fi, F2Iceil)) /* fi = ceil(f) */ - return fi <= i; /* compare them as integers */ - else /* 'f' is either greater or less than all integers */ - return f < 0; /* less? */ - } -} - - -/* -** Return 'l < r', for numbers. -*/ -l_sinline int LTnum (const TValue *l, const TValue *r) { - lua_assert(ttisnumber(l) && ttisnumber(r)); - if (ttisinteger(l)) { - lua_Integer li = ivalue(l); - if (ttisinteger(r)) - return li < ivalue(r); /* both are integers */ - else /* 'l' is int and 'r' is float */ - return LTintfloat(li, fltvalue(r)); /* l < r ? */ - } - else { - lua_Number lf = fltvalue(l); /* 'l' must be float */ - if (ttisfloat(r)) - return luai_numlt(lf, fltvalue(r)); /* both are float */ - else /* 'l' is float and 'r' is int */ - return LTfloatint(lf, ivalue(r)); - } -} - - -/* -** Return 'l <= r', for numbers. -*/ -l_sinline int LEnum (const TValue *l, const TValue *r) { - lua_assert(ttisnumber(l) && ttisnumber(r)); - if (ttisinteger(l)) { - lua_Integer li = ivalue(l); - if (ttisinteger(r)) - return li <= ivalue(r); /* both are integers */ - else /* 'l' is int and 'r' is float */ - return LEintfloat(li, fltvalue(r)); /* l <= r ? */ - } - else { - lua_Number lf = fltvalue(l); /* 'l' must be float */ - if (ttisfloat(r)) - return luai_numle(lf, fltvalue(r)); /* both are float */ - else /* 'l' is float and 'r' is int */ - return LEfloatint(lf, ivalue(r)); - } -} - - -/* -** return 'l < r' for non-numbers. -*/ -static int lessthanothers (lua_State *L, const TValue *l, const TValue *r) { - lua_assert(!ttisnumber(l) || !ttisnumber(r)); - if (ttisstring(l) && ttisstring(r)) /* both are strings? */ - return l_strcmp(tsvalue(l), tsvalue(r)) < 0; - else - return luaT_callorderTM(L, l, r, TM_LT); -} - - -/* -** Main operation less than; return 'l < r'. -*/ -int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r) { - if (ttisnumber(l) && ttisnumber(r)) /* both operands are numbers? */ - return LTnum(l, r); - else return lessthanothers(L, l, r); -} - - -/* -** return 'l <= r' for non-numbers. -*/ -static int lessequalothers (lua_State *L, const TValue *l, const TValue *r) { - lua_assert(!ttisnumber(l) || !ttisnumber(r)); - if (ttisstring(l) && ttisstring(r)) /* both are strings? */ - return l_strcmp(tsvalue(l), tsvalue(r)) <= 0; - else - return luaT_callorderTM(L, l, r, TM_LE); -} - - -/* -** Main operation less than or equal to; return 'l <= r'. -*/ -int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r) { - if (ttisnumber(l) && ttisnumber(r)) /* both operands are numbers? */ - return LEnum(l, r); - else return lessequalothers(L, l, r); -} - - -/* -** Main operation for equality of Lua values; return 't1 == t2'. -** L == NULL means raw equality (no metamethods) -*/ -int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2) { - const TValue *tm; - if (ttype(t1) != ttype(t2)) /* not the same type? */ - return 0; - else if (ttypetag(t1) != ttypetag(t2)) { - switch (ttypetag(t1)) { - case LUA_VNUMINT: { /* integer == float? */ - /* integer and float can only be equal if float has an integer - value equal to the integer */ - lua_Integer i2; - return (luaV_flttointeger(fltvalue(t2), &i2, F2Ieq) && - ivalue(t1) == i2); - } - case LUA_VNUMFLT: { /* float == integer? */ - lua_Integer i1; /* see comment in previous case */ - return (luaV_flttointeger(fltvalue(t1), &i1, F2Ieq) && - i1 == ivalue(t2)); - } - case LUA_VSHRSTR: case LUA_VLNGSTR: { - /* compare two strings with different variants: they can be - equal when one string is a short string and the other is - an external string */ - return luaS_eqstr(tsvalue(t1), tsvalue(t2)); - } - default: - /* only numbers (integer/float) and strings (long/short) can have - equal values with different variants */ - return 0; - } - } - else { /* equal variants */ - switch (ttypetag(t1)) { - case LUA_VNIL: case LUA_VFALSE: case LUA_VTRUE: - return 1; - case LUA_VNUMINT: - return (ivalue(t1) == ivalue(t2)); - case LUA_VNUMFLT: - return (fltvalue(t1) == fltvalue(t2)); - case LUA_VLIGHTUSERDATA: return pvalue(t1) == pvalue(t2); - case LUA_VSHRSTR: - return eqshrstr(tsvalue(t1), tsvalue(t2)); - case LUA_VLNGSTR: - return luaS_eqstr(tsvalue(t1), tsvalue(t2)); - case LUA_VUSERDATA: { - if (uvalue(t1) == uvalue(t2)) return 1; - else if (L == NULL) return 0; - tm = fasttm(L, uvalue(t1)->metatable, TM_EQ); - if (tm == NULL) - tm = fasttm(L, uvalue(t2)->metatable, TM_EQ); - break; /* will try TM */ - } - case LUA_VTABLE: { - if (hvalue(t1) == hvalue(t2)) return 1; - else if (L == NULL) return 0; - tm = fasttm(L, hvalue(t1)->metatable, TM_EQ); - if (tm == NULL) - tm = fasttm(L, hvalue(t2)->metatable, TM_EQ); - break; /* will try TM */ - } - case LUA_VLCF: - return (fvalue(t1) == fvalue(t2)); - default: /* functions and threads */ - return (gcvalue(t1) == gcvalue(t2)); - } - if (tm == NULL) /* no TM? */ - return 0; /* objects are different */ - else { - int tag = luaT_callTMres(L, tm, t1, t2, L->top.p); /* call TM */ - return !tagisfalse(tag); - } - } -} - - -/* macro used by 'luaV_concat' to ensure that element at 'o' is a string */ -#define tostring(L,o) \ - (ttisstring(o) || (cvt2str(o) && (luaO_tostring(L, o), 1))) - -/* -** Check whether object is a short empty string to optimize concatenation. -** (External strings can be empty too; they will be concatenated like -** non-empty ones.) -*/ -#define isemptystr(o) (ttisshrstring(o) && tsvalue(o)->shrlen == 0) - -/* copy strings in stack from top - n up to top - 1 to buffer */ -static void copy2buff (StkId top, int n, char *buff) { - size_t tl = 0; /* size already copied */ - do { - TString *st = tsvalue(s2v(top - n)); - size_t l; /* length of string being copied */ - const char *s = getlstr(st, l); - memcpy(buff + tl, s, l * sizeof(char)); - tl += l; - } while (--n > 0); -} - - -/* -** Main operation for concatenation: concat 'total' values in the stack, -** from 'L->top.p - total' up to 'L->top.p - 1'. -*/ -void luaV_concat (lua_State *L, int total) { - if (total == 1) - return; /* "all" values already concatenated */ - do { - StkId top = L->top.p; - int n = 2; /* number of elements handled in this pass (at least 2) */ - if (!(ttisstring(s2v(top - 2)) || cvt2str(s2v(top - 2))) || - !tostring(L, s2v(top - 1))) - luaT_tryconcatTM(L); /* may invalidate 'top' */ - else if (isemptystr(s2v(top - 1))) /* second operand is empty? */ - cast_void(tostring(L, s2v(top - 2))); /* result is first operand */ - else if (isemptystr(s2v(top - 2))) { /* first operand is empty string? */ - setobjs2s(L, top - 2, top - 1); /* result is second op. */ - } - else { - /* at least two string values; get as many as possible */ - size_t tl = tsslen(tsvalue(s2v(top - 1))); /* total length */ - TString *ts; - /* collect total length and number of strings */ - for (n = 1; n < total && tostring(L, s2v(top - n - 1)); n++) { - size_t l = tsslen(tsvalue(s2v(top - n - 1))); - if (l_unlikely(l >= MAX_SIZE - sizeof(TString) - tl)) { - L->top.p = top - total; /* pop strings to avoid wasting stack */ - luaG_runerror(L, "string length overflow"); - } - tl += l; - } - if (tl <= LUAI_MAXSHORTLEN) { /* is result a short string? */ - char buff[LUAI_MAXSHORTLEN]; - copy2buff(top, n, buff); /* copy strings to buffer */ - ts = luaS_newlstr(L, buff, tl); - } - else { /* long string; copy strings directly to final result */ - ts = luaS_createlngstrobj(L, tl); - copy2buff(top, n, getlngstr(ts)); - } - setsvalue2s(L, top - n, ts); /* create result */ - } - total -= n - 1; /* got 'n' strings to create one new */ - L->top.p -= n - 1; /* popped 'n' strings and pushed one */ - } while (total > 1); /* repeat until only 1 result left */ -} - - -/* -** Main operation 'ra = #rb'. -*/ -void luaV_objlen (lua_State *L, StkId ra, const TValue *rb) { - const TValue *tm; - switch (ttypetag(rb)) { - case LUA_VTABLE: { - Table *h = hvalue(rb); - tm = fasttm(L, h->metatable, TM_LEN); - if (tm) break; /* metamethod? break switch to call it */ - setivalue(s2v(ra), l_castU2S(luaH_getn(L, h))); /* else primitive len */ - return; - } - case LUA_VSHRSTR: { - setivalue(s2v(ra), tsvalue(rb)->shrlen); - return; - } - case LUA_VLNGSTR: { - setivalue(s2v(ra), cast_st2S(tsvalue(rb)->u.lnglen)); - return; - } - default: { /* try metamethod */ - tm = luaT_gettmbyobj(L, rb, TM_LEN); - if (l_unlikely(notm(tm))) /* no metamethod? */ - luaG_typeerror(L, rb, "get length of"); - break; - } - } - luaT_callTMres(L, tm, rb, rb, ra); -} - - -/* -** Integer division; return 'm // n', that is, floor(m/n). -** C division truncates its result (rounds towards zero). -** 'floor(q) == trunc(q)' when 'q >= 0' or when 'q' is integer, -** otherwise 'floor(q) == trunc(q) - 1'. -*/ -lua_Integer luaV_idiv (lua_State *L, lua_Integer m, lua_Integer n) { - if (l_unlikely(l_castS2U(n) + 1u <= 1u)) { /* special cases: -1 or 0 */ - if (n == 0) - luaG_runerror(L, "attempt to divide by zero"); - return intop(-, 0, m); /* n==-1; avoid overflow with 0x80000...//-1 */ - } - else { - lua_Integer q = m / n; /* perform C division */ - if ((m ^ n) < 0 && m % n != 0) /* 'm/n' would be negative non-integer? */ - q -= 1; /* correct result for different rounding */ - return q; - } -} - - -/* -** Integer modulus; return 'm % n'. (Assume that C '%' with -** negative operands follows C99 behavior. See previous comment -** about luaV_idiv.) -*/ -lua_Integer luaV_mod (lua_State *L, lua_Integer m, lua_Integer n) { - if (l_unlikely(l_castS2U(n) + 1u <= 1u)) { /* special cases: -1 or 0 */ - if (n == 0) - luaG_runerror(L, "attempt to perform 'n%%0'"); - return 0; /* m % -1 == 0; avoid overflow with 0x80000...%-1 */ - } - else { - lua_Integer r = m % n; - if (r != 0 && (r ^ n) < 0) /* 'm/n' would be non-integer negative? */ - r += n; /* correct result for different rounding */ - return r; - } -} - - -/* -** Float modulus -*/ -lua_Number luaV_modf (lua_State *L, lua_Number m, lua_Number n) { - lua_Number r; - luai_nummod(L, m, n, r); - return r; -} - - -/* number of bits in an integer */ -#define NBITS l_numbits(lua_Integer) - - -/* -** Shift left operation. (Shift right just negates 'y'.) -*/ -lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y) { - if (y < 0) { /* shift right? */ - if (y <= -NBITS) return 0; - else return intop(>>, x, -y); - } - else { /* shift left */ - if (y >= NBITS) return 0; - else return intop(<<, x, y); - } -} - - -/* -** create a new Lua closure, push it in the stack, and initialize -** its upvalues. -*/ -static void pushclosure (lua_State *L, Proto *p, UpVal **encup, StkId base, - StkId ra) { - int nup = p->sizeupvalues; - Upvaldesc *uv = p->upvalues; - int i; - LClosure *ncl = luaF_newLclosure(L, nup); - ncl->p = p; - setclLvalue2s(L, ra, ncl); /* anchor new closure in stack */ - for (i = 0; i < nup; i++) { /* fill in its upvalues */ - if (uv[i].instack) /* upvalue refers to local variable? */ - ncl->upvals[i] = luaF_findupval(L, base + uv[i].idx); - else /* get upvalue from enclosing function */ - ncl->upvals[i] = encup[uv[i].idx]; - luaC_objbarrier(L, ncl, ncl->upvals[i]); - } -} - - -/* -** finish execution of an opcode interrupted by a yield -*/ -void luaV_finishOp (lua_State *L) { - CallInfo *ci = L->ci; - StkId base = ci->func.p + 1; - Instruction inst = *(ci->u.l.savedpc - 1); /* interrupted instruction */ - OpCode op = GET_OPCODE(inst); - switch (op) { /* finish its execution */ - case OP_MMBIN: case OP_MMBINI: case OP_MMBINK: { - setobjs2s(L, base + GETARG_A(*(ci->u.l.savedpc - 2)), --L->top.p); - break; - } - case OP_UNM: case OP_BNOT: case OP_LEN: - case OP_GETTABUP: case OP_GETTABLE: case OP_GETI: - case OP_GETFIELD: case OP_SELF: { - setobjs2s(L, base + GETARG_A(inst), --L->top.p); - break; - } - case OP_LT: case OP_LE: - case OP_LTI: case OP_LEI: - case OP_GTI: case OP_GEI: - case OP_EQ: { /* note that 'OP_EQI'/'OP_EQK' cannot yield */ - int res = !l_isfalse(s2v(L->top.p - 1)); - L->top.p--; - lua_assert(GET_OPCODE(*ci->u.l.savedpc) == OP_JMP); - if (res != GETARG_k(inst)) /* condition failed? */ - ci->u.l.savedpc++; /* skip jump instruction */ - break; - } - case OP_CONCAT: { - StkId top = L->top.p - 1; /* top when 'luaT_tryconcatTM' was called */ - int a = GETARG_A(inst); /* first element to concatenate */ - int total = cast_int(top - 1 - (base + a)); /* yet to concatenate */ - setobjs2s(L, top - 2, top); /* put TM result in proper position */ - L->top.p = top - 1; /* top is one after last element (at top-2) */ - luaV_concat(L, total); /* concat them (may yield again) */ - break; - } - case OP_CLOSE: { /* yielded closing variables */ - ci->u.l.savedpc--; /* repeat instruction to close other vars. */ - break; - } - case OP_RETURN: { /* yielded closing variables */ - StkId ra = base + GETARG_A(inst); - /* adjust top to signal correct number of returns, in case the - return is "up to top" ('isIT') */ - L->top.p = ra + ci->u2.nres; - /* repeat instruction to close other vars. and complete the return */ - ci->u.l.savedpc--; - break; - } - default: { - /* only these other opcodes can yield */ - lua_assert(op == OP_TFORCALL || op == OP_CALL || - op == OP_TAILCALL || op == OP_SETTABUP || op == OP_SETTABLE || - op == OP_SETI || op == OP_SETFIELD); - break; - } - } -} - - - - -/* -** {================================================================== -** Macros for arithmetic/bitwise/comparison opcodes in 'luaV_execute' -** -** All these macros are to be used exclusively inside the main -** interpreter loop (function luaV_execute) and may access directly -** the local variables of that function (L, i, pc, ci, etc.). -** =================================================================== -*/ - -#define l_addi(L,a,b) intop(+, a, b) -#define l_subi(L,a,b) intop(-, a, b) -#define l_muli(L,a,b) intop(*, a, b) -#define l_band(a,b) intop(&, a, b) -#define l_bor(a,b) intop(|, a, b) -#define l_bxor(a,b) intop(^, a, b) - -#define l_lti(a,b) (a < b) -#define l_lei(a,b) (a <= b) -#define l_gti(a,b) (a > b) -#define l_gei(a,b) (a >= b) - - -/* -** Arithmetic operations with immediate operands. 'iop' is the integer -** operation, 'fop' is the float operation. -*/ -#define op_arithI(L,iop,fop) { \ - TValue *ra = vRA(i); \ - TValue *v1 = vRB(i); \ - int imm = GETARG_sC(i); \ - if (ttisinteger(v1)) { \ - lua_Integer iv1 = ivalue(v1); \ - pc++; setivalue(ra, iop(L, iv1, imm)); \ - } \ - else if (ttisfloat(v1)) { \ - lua_Number nb = fltvalue(v1); \ - lua_Number fimm = cast_num(imm); \ - pc++; setfltvalue(ra, fop(L, nb, fimm)); \ - }} - - -/* -** Auxiliary function for arithmetic operations over floats and others -** with two operands. -*/ -#define op_arithf_aux(L,v1,v2,fop) { \ - lua_Number n1; lua_Number n2; \ - if (tonumberns(v1, n1) && tonumberns(v2, n2)) { \ - StkId ra = RA(i); \ - pc++; setfltvalue(s2v(ra), fop(L, n1, n2)); \ - }} - - -/* -** Arithmetic operations over floats and others with register operands. -*/ -#define op_arithf(L,fop) { \ - TValue *v1 = vRB(i); \ - TValue *v2 = vRC(i); \ - op_arithf_aux(L, v1, v2, fop); } - - -/* -** Arithmetic operations with K operands for floats. -*/ -#define op_arithfK(L,fop) { \ - TValue *v1 = vRB(i); \ - TValue *v2 = KC(i); lua_assert(ttisnumber(v2)); \ - op_arithf_aux(L, v1, v2, fop); } - - -/* -** Arithmetic operations over integers and floats. -*/ -#define op_arith_aux(L,v1,v2,iop,fop) { \ - if (ttisinteger(v1) && ttisinteger(v2)) { \ - StkId ra = RA(i); \ - lua_Integer i1 = ivalue(v1); lua_Integer i2 = ivalue(v2); \ - pc++; setivalue(s2v(ra), iop(L, i1, i2)); \ - } \ - else op_arithf_aux(L, v1, v2, fop); } - - -/* -** Arithmetic operations with register operands. -*/ -#define op_arith(L,iop,fop) { \ - TValue *v1 = vRB(i); \ - TValue *v2 = vRC(i); \ - op_arith_aux(L, v1, v2, iop, fop); } - - -/* -** Arithmetic operations with K operands. -*/ -#define op_arithK(L,iop,fop) { \ - TValue *v1 = vRB(i); \ - TValue *v2 = KC(i); lua_assert(ttisnumber(v2)); \ - op_arith_aux(L, v1, v2, iop, fop); } - - -/* -** Bitwise operations with constant operand. -*/ -#define op_bitwiseK(L,op) { \ - TValue *v1 = vRB(i); \ - TValue *v2 = KC(i); \ - lua_Integer i1; \ - lua_Integer i2 = ivalue(v2); \ - if (tointegerns(v1, &i1)) { \ - StkId ra = RA(i); \ - pc++; setivalue(s2v(ra), op(i1, i2)); \ - }} - - -/* -** Bitwise operations with register operands. -*/ -#define op_bitwise(L,op) { \ - TValue *v1 = vRB(i); \ - TValue *v2 = vRC(i); \ - lua_Integer i1; lua_Integer i2; \ - if (tointegerns(v1, &i1) && tointegerns(v2, &i2)) { \ - StkId ra = RA(i); \ - pc++; setivalue(s2v(ra), op(i1, i2)); \ - }} - - -/* -** Order operations with register operands. 'opn' actually works -** for all numbers, but the fast track improves performance for -** integers. -*/ -#define op_order(L,opi,opn,other) { \ - TValue *ra = vRA(i); \ - int cond; \ - TValue *rb = vRB(i); \ - if (ttisinteger(ra) && ttisinteger(rb)) { \ - lua_Integer ia = ivalue(ra); \ - lua_Integer ib = ivalue(rb); \ - cond = opi(ia, ib); \ - } \ - else if (ttisnumber(ra) && ttisnumber(rb)) \ - cond = opn(ra, rb); \ - else \ - Protect(cond = other(L, ra, rb)); \ - docondjump(); } - - -/* -** Order operations with immediate operand. (Immediate operand is -** always small enough to have an exact representation as a float.) -*/ -#define op_orderI(L,opi,opf,inv,tm) { \ - TValue *ra = vRA(i); \ - int cond; \ - int im = GETARG_sB(i); \ - if (ttisinteger(ra)) \ - cond = opi(ivalue(ra), im); \ - else if (ttisfloat(ra)) { \ - lua_Number fa = fltvalue(ra); \ - lua_Number fim = cast_num(im); \ - cond = opf(fa, fim); \ - } \ - else { \ - int isf = GETARG_C(i); \ - Protect(cond = luaT_callorderiTM(L, ra, im, inv, isf, tm)); \ - } \ - docondjump(); } - -/* }================================================================== */ - - -/* -** {================================================================== -** Function 'luaV_execute': main interpreter loop -** =================================================================== -*/ - -/* -** some macros for common tasks in 'luaV_execute' -*/ - - -#define RA(i) (base+GETARG_A(i)) -#define vRA(i) s2v(RA(i)) -#define RB(i) (base+GETARG_B(i)) -#define vRB(i) s2v(RB(i)) -#define KB(i) (k+GETARG_B(i)) -#define RC(i) (base+GETARG_C(i)) -#define vRC(i) s2v(RC(i)) -#define KC(i) (k+GETARG_C(i)) -#define RKC(i) ((TESTARG_k(i)) ? k + GETARG_C(i) : s2v(base + GETARG_C(i))) - - - -#define updatetrap(ci) (trap = ci->u.l.trap) - -#define updatebase(ci) (base = ci->func.p + 1) - - -#define updatestack(ci) \ - { if (l_unlikely(trap)) { updatebase(ci); ra = RA(i); } } - - -/* -** Execute a jump instruction. The 'updatetrap' allows signals to stop -** tight loops. (Without it, the local copy of 'trap' could never change.) -*/ -#define dojump(ci,i,e) { pc += GETARG_sJ(i) + e; updatetrap(ci); } - - -/* for test instructions, execute the jump instruction that follows it */ -#define donextjump(ci) { Instruction ni = *pc; dojump(ci, ni, 1); } - -/* -** do a conditional jump: skip next instruction if 'cond' is not what -** was expected (parameter 'k'), else do next instruction, which must -** be a jump. -*/ -#define docondjump() if (cond != GETARG_k(i)) pc++; else donextjump(ci); - - -/* -** Correct global 'pc'. -*/ -#define savepc(ci) (ci->u.l.savedpc = pc) - - -/* -** Whenever code can raise errors, the global 'pc' and the global -** 'top' must be correct to report occasional errors. -*/ -#define savestate(L,ci) (savepc(ci), L->top.p = ci->top.p) - - -/* -** Protect code that, in general, can raise errors, reallocate the -** stack, and change the hooks. -*/ -#define Protect(exp) (savestate(L,ci), (exp), updatetrap(ci)) - -/* special version that does not change the top */ -#define ProtectNT(exp) (savepc(ci), (exp), updatetrap(ci)) - -/* -** Protect code that can only raise errors. (That is, it cannot change -** the stack or hooks.) -*/ -#define halfProtect(exp) (savestate(L,ci), (exp)) - -/* -** macro executed during Lua functions at points where the -** function can yield. -*/ -#if !defined(luai_threadyield) -#define luai_threadyield(L) {lua_unlock(L); lua_lock(L);} -#endif - -/* 'c' is the limit of live values in the stack */ -#define checkGC(L,c) \ - { luaC_condGC(L, (savepc(ci), L->top.p = (c)), \ - updatetrap(ci)); \ - luai_threadyield(L); } - - -/* fetch an instruction and prepare its execution */ -#define vmfetch() { \ - if (l_unlikely(trap)) { /* stack reallocation or hooks? */ \ - trap = luaG_traceexec(L, pc); /* handle hooks */ \ - updatebase(ci); /* correct stack */ \ - } \ - i = *(pc++); \ -} - -#define vmdispatch(o) switch(o) -#define vmcase(l) case l: -#define vmbreak break - - -void luaV_execute (lua_State *L, CallInfo *ci) { - LClosure *cl; - TValue *k; - StkId base; - const Instruction *pc; - int trap; -#if LUA_USE_JUMPTABLE -#include "ljumptab.h" -#endif - startfunc: - trap = L->hookmask; - returning: /* trap already set */ - cl = ci_func(ci); - k = cl->p->k; - pc = ci->u.l.savedpc; - if (l_unlikely(trap)) - trap = luaG_tracecall(L); - base = ci->func.p + 1; - /* main loop of interpreter */ - for (;;) { - Instruction i; /* instruction being executed */ - vmfetch(); - #if 0 - { /* low-level line tracing for debugging Lua */ - #include "lopnames.h" - int pcrel = pcRel(pc, cl->p); - printf("line: %d; %s (%d)\n", luaG_getfuncline(cl->p, pcrel), - opnames[GET_OPCODE(i)], pcrel); - } - #endif - lua_assert(base == ci->func.p + 1); - lua_assert(base <= L->top.p && L->top.p <= L->stack_last.p); - /* for tests, invalidate top for instructions not expecting it */ - lua_assert(luaP_isIT(i) || (cast_void(L->top.p = base), 1)); - vmdispatch (GET_OPCODE(i)) { - vmcase(OP_MOVE) { - StkId ra = RA(i); - setobjs2s(L, ra, RB(i)); - vmbreak; - } - vmcase(OP_LOADI) { - StkId ra = RA(i); - lua_Integer b = GETARG_sBx(i); - setivalue(s2v(ra), b); - vmbreak; - } - vmcase(OP_LOADF) { - StkId ra = RA(i); - int b = GETARG_sBx(i); - setfltvalue(s2v(ra), cast_num(b)); - vmbreak; - } - vmcase(OP_LOADK) { - StkId ra = RA(i); - TValue *rb = k + GETARG_Bx(i); - setobj2s(L, ra, rb); - vmbreak; - } - vmcase(OP_LOADKX) { - StkId ra = RA(i); - TValue *rb; - rb = k + GETARG_Ax(*pc); pc++; - setobj2s(L, ra, rb); - vmbreak; - } - vmcase(OP_LOADFALSE) { - StkId ra = RA(i); - setbfvalue(s2v(ra)); - vmbreak; - } - vmcase(OP_LFALSESKIP) { - StkId ra = RA(i); - setbfvalue(s2v(ra)); - pc++; /* skip next instruction */ - vmbreak; - } - vmcase(OP_LOADTRUE) { - StkId ra = RA(i); - setbtvalue(s2v(ra)); - vmbreak; - } - vmcase(OP_LOADNIL) { - StkId ra = RA(i); - int b = GETARG_B(i); - do { - setnilvalue(s2v(ra++)); - } while (b--); - vmbreak; - } - vmcase(OP_GETUPVAL) { - StkId ra = RA(i); - int b = GETARG_B(i); - setobj2s(L, ra, cl->upvals[b]->v.p); - vmbreak; - } - vmcase(OP_SETUPVAL) { - StkId ra = RA(i); - UpVal *uv = cl->upvals[GETARG_B(i)]; - setobj(L, uv->v.p, s2v(ra)); - luaC_barrier(L, uv, s2v(ra)); - vmbreak; - } - vmcase(OP_GETTABUP) { - StkId ra = RA(i); - TValue *upval = cl->upvals[GETARG_B(i)]->v.p; - TValue *rc = KC(i); - TString *key = tsvalue(rc); /* key must be a short string */ - lu_byte tag; - luaV_fastget(upval, key, s2v(ra), luaH_getshortstr, tag); - if (tagisempty(tag)) - Protect(luaV_finishget(L, upval, rc, ra, tag)); - vmbreak; - } - vmcase(OP_GETTABLE) { - StkId ra = RA(i); - TValue *rb = vRB(i); - TValue *rc = vRC(i); - lu_byte tag; - if (ttisinteger(rc)) { /* fast track for integers? */ - luaV_fastgeti(rb, ivalue(rc), s2v(ra), tag); - } - else - luaV_fastget(rb, rc, s2v(ra), luaH_get, tag); - if (tagisempty(tag)) - Protect(luaV_finishget(L, rb, rc, ra, tag)); - vmbreak; - } - vmcase(OP_GETI) { - StkId ra = RA(i); - TValue *rb = vRB(i); - int c = GETARG_C(i); - lu_byte tag; - luaV_fastgeti(rb, c, s2v(ra), tag); - if (tagisempty(tag)) { - TValue key; - setivalue(&key, c); - Protect(luaV_finishget(L, rb, &key, ra, tag)); - } - vmbreak; - } - vmcase(OP_GETFIELD) { - StkId ra = RA(i); - TValue *rb = vRB(i); - TValue *rc = KC(i); - TString *key = tsvalue(rc); /* key must be a short string */ - lu_byte tag; - luaV_fastget(rb, key, s2v(ra), luaH_getshortstr, tag); - if (tagisempty(tag)) - Protect(luaV_finishget(L, rb, rc, ra, tag)); - vmbreak; - } - vmcase(OP_SETTABUP) { - int hres; - TValue *upval = cl->upvals[GETARG_A(i)]->v.p; - TValue *rb = KB(i); - TValue *rc = RKC(i); - TString *key = tsvalue(rb); /* key must be a short string */ - luaV_fastset(upval, key, rc, hres, luaH_psetshortstr); - if (hres == HOK) - luaV_finishfastset(L, upval, rc); - else - Protect(luaV_finishset(L, upval, rb, rc, hres)); - vmbreak; - } - vmcase(OP_SETTABLE) { - StkId ra = RA(i); - int hres; - TValue *rb = vRB(i); /* key (table is in 'ra') */ - TValue *rc = RKC(i); /* value */ - if (ttisinteger(rb)) { /* fast track for integers? */ - luaV_fastseti(s2v(ra), ivalue(rb), rc, hres); - } - else { - luaV_fastset(s2v(ra), rb, rc, hres, luaH_pset); - } - if (hres == HOK) - luaV_finishfastset(L, s2v(ra), rc); - else - Protect(luaV_finishset(L, s2v(ra), rb, rc, hres)); - vmbreak; - } - vmcase(OP_SETI) { - StkId ra = RA(i); - int hres; - int b = GETARG_B(i); - TValue *rc = RKC(i); - luaV_fastseti(s2v(ra), b, rc, hres); - if (hres == HOK) - luaV_finishfastset(L, s2v(ra), rc); - else { - TValue key; - setivalue(&key, b); - Protect(luaV_finishset(L, s2v(ra), &key, rc, hres)); - } - vmbreak; - } - vmcase(OP_SETFIELD) { - StkId ra = RA(i); - int hres; - TValue *rb = KB(i); - TValue *rc = RKC(i); - TString *key = tsvalue(rb); /* key must be a short string */ - luaV_fastset(s2v(ra), key, rc, hres, luaH_psetshortstr); - if (hres == HOK) - luaV_finishfastset(L, s2v(ra), rc); - else - Protect(luaV_finishset(L, s2v(ra), rb, rc, hres)); - vmbreak; - } - vmcase(OP_NEWTABLE) { - StkId ra = RA(i); - unsigned b = cast_uint(GETARG_vB(i)); /* log2(hash size) + 1 */ - unsigned c = cast_uint(GETARG_vC(i)); /* array size */ - Table *t; - if (b > 0) - b = 1u << (b - 1); /* hash size is 2^(b - 1) */ - if (TESTARG_k(i)) { /* non-zero extra argument? */ - lua_assert(GETARG_Ax(*pc) != 0); - /* add it to array size */ - c += cast_uint(GETARG_Ax(*pc)) * (MAXARG_vC + 1); - } - pc++; /* skip extra argument */ - L->top.p = ra + 1; /* correct top in case of emergency GC */ - t = luaH_new(L); /* memory allocation */ - sethvalue2s(L, ra, t); - if (b != 0 || c != 0) - luaH_resize(L, t, c, b); /* idem */ - checkGC(L, ra + 1); - vmbreak; - } - vmcase(OP_SELF) { - StkId ra = RA(i); - lu_byte tag; - TValue *rb = vRB(i); - TValue *rc = KC(i); - TString *key = tsvalue(rc); /* key must be a short string */ - setobj2s(L, ra + 1, rb); - luaV_fastget(rb, key, s2v(ra), luaH_getshortstr, tag); - if (tagisempty(tag)) - Protect(luaV_finishget(L, rb, rc, ra, tag)); - vmbreak; - } - vmcase(OP_ADDI) { - op_arithI(L, l_addi, luai_numadd); - vmbreak; - } - vmcase(OP_ADDK) { - op_arithK(L, l_addi, luai_numadd); - vmbreak; - } - vmcase(OP_SUBK) { - op_arithK(L, l_subi, luai_numsub); - vmbreak; - } - vmcase(OP_MULK) { - op_arithK(L, l_muli, luai_nummul); - vmbreak; - } - vmcase(OP_MODK) { - savestate(L, ci); /* in case of division by 0 */ - op_arithK(L, luaV_mod, luaV_modf); - vmbreak; - } - vmcase(OP_POWK) { - op_arithfK(L, luai_numpow); - vmbreak; - } - vmcase(OP_DIVK) { - op_arithfK(L, luai_numdiv); - vmbreak; - } - vmcase(OP_IDIVK) { - savestate(L, ci); /* in case of division by 0 */ - op_arithK(L, luaV_idiv, luai_numidiv); - vmbreak; - } - vmcase(OP_BANDK) { - op_bitwiseK(L, l_band); - vmbreak; - } - vmcase(OP_BORK) { - op_bitwiseK(L, l_bor); - vmbreak; - } - vmcase(OP_BXORK) { - op_bitwiseK(L, l_bxor); - vmbreak; - } - vmcase(OP_SHLI) { - StkId ra = RA(i); - TValue *rb = vRB(i); - int ic = GETARG_sC(i); - lua_Integer ib; - if (tointegerns(rb, &ib)) { - pc++; setivalue(s2v(ra), luaV_shiftl(ic, ib)); - } - vmbreak; - } - vmcase(OP_SHRI) { - StkId ra = RA(i); - TValue *rb = vRB(i); - int ic = GETARG_sC(i); - lua_Integer ib; - if (tointegerns(rb, &ib)) { - pc++; setivalue(s2v(ra), luaV_shiftl(ib, -ic)); - } - vmbreak; - } - vmcase(OP_ADD) { - op_arith(L, l_addi, luai_numadd); - vmbreak; - } - vmcase(OP_SUB) { - op_arith(L, l_subi, luai_numsub); - vmbreak; - } - vmcase(OP_MUL) { - op_arith(L, l_muli, luai_nummul); - vmbreak; - } - vmcase(OP_MOD) { - savestate(L, ci); /* in case of division by 0 */ - op_arith(L, luaV_mod, luaV_modf); - vmbreak; - } - vmcase(OP_POW) { - op_arithf(L, luai_numpow); - vmbreak; - } - vmcase(OP_DIV) { /* float division (always with floats) */ - op_arithf(L, luai_numdiv); - vmbreak; - } - vmcase(OP_IDIV) { /* floor division */ - savestate(L, ci); /* in case of division by 0 */ - op_arith(L, luaV_idiv, luai_numidiv); - vmbreak; - } - vmcase(OP_BAND) { - op_bitwise(L, l_band); - vmbreak; - } - vmcase(OP_BOR) { - op_bitwise(L, l_bor); - vmbreak; - } - vmcase(OP_BXOR) { - op_bitwise(L, l_bxor); - vmbreak; - } - vmcase(OP_SHL) { - op_bitwise(L, luaV_shiftl); - vmbreak; - } - vmcase(OP_SHR) { - op_bitwise(L, luaV_shiftr); - vmbreak; - } - vmcase(OP_MMBIN) { - StkId ra = RA(i); - Instruction pi = *(pc - 2); /* original arith. expression */ - TValue *rb = vRB(i); - TMS tm = (TMS)GETARG_C(i); - StkId result = RA(pi); - lua_assert(OP_ADD <= GET_OPCODE(pi) && GET_OPCODE(pi) <= OP_SHR); - Protect(luaT_trybinTM(L, s2v(ra), rb, result, tm)); - vmbreak; - } - vmcase(OP_MMBINI) { - StkId ra = RA(i); - Instruction pi = *(pc - 2); /* original arith. expression */ - int imm = GETARG_sB(i); - TMS tm = (TMS)GETARG_C(i); - int flip = GETARG_k(i); - StkId result = RA(pi); - Protect(luaT_trybiniTM(L, s2v(ra), imm, flip, result, tm)); - vmbreak; - } - vmcase(OP_MMBINK) { - StkId ra = RA(i); - Instruction pi = *(pc - 2); /* original arith. expression */ - TValue *imm = KB(i); - TMS tm = (TMS)GETARG_C(i); - int flip = GETARG_k(i); - StkId result = RA(pi); - Protect(luaT_trybinassocTM(L, s2v(ra), imm, flip, result, tm)); - vmbreak; - } - vmcase(OP_UNM) { - StkId ra = RA(i); - TValue *rb = vRB(i); - lua_Number nb; - if (ttisinteger(rb)) { - lua_Integer ib = ivalue(rb); - setivalue(s2v(ra), intop(-, 0, ib)); - } - else if (tonumberns(rb, nb)) { - setfltvalue(s2v(ra), luai_numunm(L, nb)); - } - else - Protect(luaT_trybinTM(L, rb, rb, ra, TM_UNM)); - vmbreak; - } - vmcase(OP_BNOT) { - StkId ra = RA(i); - TValue *rb = vRB(i); - lua_Integer ib; - if (tointegerns(rb, &ib)) { - setivalue(s2v(ra), intop(^, ~l_castS2U(0), ib)); - } - else - Protect(luaT_trybinTM(L, rb, rb, ra, TM_BNOT)); - vmbreak; - } - vmcase(OP_NOT) { - StkId ra = RA(i); - TValue *rb = vRB(i); - if (l_isfalse(rb)) - setbtvalue(s2v(ra)); - else - setbfvalue(s2v(ra)); - vmbreak; - } - vmcase(OP_LEN) { - StkId ra = RA(i); - Protect(luaV_objlen(L, ra, vRB(i))); - vmbreak; - } - vmcase(OP_CONCAT) { - StkId ra = RA(i); - int n = GETARG_B(i); /* number of elements to concatenate */ - L->top.p = ra + n; /* mark the end of concat operands */ - ProtectNT(luaV_concat(L, n)); - checkGC(L, L->top.p); /* 'luaV_concat' ensures correct top */ - vmbreak; - } - vmcase(OP_CLOSE) { - StkId ra = RA(i); - lua_assert(!GETARG_B(i)); /* 'close must be alive */ - Protect(luaF_close(L, ra, LUA_OK, 1)); - vmbreak; - } - vmcase(OP_TBC) { - StkId ra = RA(i); - /* create new to-be-closed upvalue */ - halfProtect(luaF_newtbcupval(L, ra)); - vmbreak; - } - vmcase(OP_JMP) { - dojump(ci, i, 0); - vmbreak; - } - vmcase(OP_EQ) { - StkId ra = RA(i); - int cond; - TValue *rb = vRB(i); - Protect(cond = luaV_equalobj(L, s2v(ra), rb)); - docondjump(); - vmbreak; - } - vmcase(OP_LT) { - op_order(L, l_lti, LTnum, lessthanothers); - vmbreak; - } - vmcase(OP_LE) { - op_order(L, l_lei, LEnum, lessequalothers); - vmbreak; - } - vmcase(OP_EQK) { - StkId ra = RA(i); - TValue *rb = KB(i); - /* basic types do not use '__eq'; we can use raw equality */ - int cond = luaV_rawequalobj(s2v(ra), rb); - docondjump(); - vmbreak; - } - vmcase(OP_EQI) { - StkId ra = RA(i); - int cond; - int im = GETARG_sB(i); - if (ttisinteger(s2v(ra))) - cond = (ivalue(s2v(ra)) == im); - else if (ttisfloat(s2v(ra))) - cond = luai_numeq(fltvalue(s2v(ra)), cast_num(im)); - else - cond = 0; /* other types cannot be equal to a number */ - docondjump(); - vmbreak; - } - vmcase(OP_LTI) { - op_orderI(L, l_lti, luai_numlt, 0, TM_LT); - vmbreak; - } - vmcase(OP_LEI) { - op_orderI(L, l_lei, luai_numle, 0, TM_LE); - vmbreak; - } - vmcase(OP_GTI) { - op_orderI(L, l_gti, luai_numgt, 1, TM_LT); - vmbreak; - } - vmcase(OP_GEI) { - op_orderI(L, l_gei, luai_numge, 1, TM_LE); - vmbreak; - } - vmcase(OP_TEST) { - StkId ra = RA(i); - int cond = !l_isfalse(s2v(ra)); - docondjump(); - vmbreak; - } - vmcase(OP_TESTSET) { - StkId ra = RA(i); - TValue *rb = vRB(i); - if (l_isfalse(rb) == GETARG_k(i)) - pc++; - else { - setobj2s(L, ra, rb); - donextjump(ci); - } - vmbreak; - } - vmcase(OP_CALL) { - StkId ra = RA(i); - CallInfo *newci; - int b = GETARG_B(i); - int nresults = GETARG_C(i) - 1; - if (b != 0) /* fixed number of arguments? */ - L->top.p = ra + b; /* top signals number of arguments */ - /* else previous instruction set top */ - savepc(ci); /* in case of errors */ - if ((newci = luaD_precall(L, ra, nresults)) == NULL) - updatetrap(ci); /* C call; nothing else to be done */ - else { /* Lua call: run function in this same C frame */ - ci = newci; - goto startfunc; - } - vmbreak; - } - vmcase(OP_TAILCALL) { - StkId ra = RA(i); - int b = GETARG_B(i); /* number of arguments + 1 (function) */ - int n; /* number of results when calling a C function */ - int nparams1 = GETARG_C(i); - /* delta is virtual 'func' - real 'func' (vararg functions) */ - int delta = (nparams1) ? ci->u.l.nextraargs + nparams1 : 0; - if (b != 0) - L->top.p = ra + b; - else /* previous instruction set top */ - b = cast_int(L->top.p - ra); - savepc(ci); /* several calls here can raise errors */ - if (TESTARG_k(i)) { - luaF_closeupval(L, base); /* close upvalues from current call */ - lua_assert(L->tbclist.p < base); /* no pending tbc variables */ - lua_assert(base == ci->func.p + 1); - } - if ((n = luaD_pretailcall(L, ci, ra, b, delta)) < 0) /* Lua function? */ - goto startfunc; /* execute the callee */ - else { /* C function? */ - ci->func.p -= delta; /* restore 'func' (if vararg) */ - luaD_poscall(L, ci, n); /* finish caller */ - updatetrap(ci); /* 'luaD_poscall' can change hooks */ - goto ret; /* caller returns after the tail call */ - } - } - vmcase(OP_RETURN) { - StkId ra = RA(i); - int n = GETARG_B(i) - 1; /* number of results */ - int nparams1 = GETARG_C(i); - if (n < 0) /* not fixed? */ - n = cast_int(L->top.p - ra); /* get what is available */ - savepc(ci); - if (TESTARG_k(i)) { /* may there be open upvalues? */ - ci->u2.nres = n; /* save number of returns */ - if (L->top.p < ci->top.p) - L->top.p = ci->top.p; - luaF_close(L, base, CLOSEKTOP, 1); - updatetrap(ci); - updatestack(ci); - } - if (nparams1) /* vararg function? */ - ci->func.p -= ci->u.l.nextraargs + nparams1; - L->top.p = ra + n; /* set call for 'luaD_poscall' */ - luaD_poscall(L, ci, n); - updatetrap(ci); /* 'luaD_poscall' can change hooks */ - goto ret; - } - vmcase(OP_RETURN0) { - if (l_unlikely(L->hookmask)) { - StkId ra = RA(i); - L->top.p = ra; - savepc(ci); - luaD_poscall(L, ci, 0); /* no hurry... */ - trap = 1; - } - else { /* do the 'poscall' here */ - int nres = get_nresults(ci->callstatus); - L->ci = ci->previous; /* back to caller */ - L->top.p = base - 1; - for (; l_unlikely(nres > 0); nres--) - setnilvalue(s2v(L->top.p++)); /* all results are nil */ - } - goto ret; - } - vmcase(OP_RETURN1) { - if (l_unlikely(L->hookmask)) { - StkId ra = RA(i); - L->top.p = ra + 1; - savepc(ci); - luaD_poscall(L, ci, 1); /* no hurry... */ - trap = 1; - } - else { /* do the 'poscall' here */ - int nres = get_nresults(ci->callstatus); - L->ci = ci->previous; /* back to caller */ - if (nres == 0) - L->top.p = base - 1; /* asked for no results */ - else { - StkId ra = RA(i); - setobjs2s(L, base - 1, ra); /* at least this result */ - L->top.p = base; - for (; l_unlikely(nres > 1); nres--) - setnilvalue(s2v(L->top.p++)); /* complete missing results */ - } - } - ret: /* return from a Lua function */ - if (ci->callstatus & CIST_FRESH) - return; /* end this frame */ - else { - ci = ci->previous; - goto returning; /* continue running caller in this frame */ - } - } - vmcase(OP_FORLOOP) { - StkId ra = RA(i); - if (ttisinteger(s2v(ra + 1))) { /* integer loop? */ - lua_Unsigned count = l_castS2U(ivalue(s2v(ra))); - if (count > 0) { /* still more iterations? */ - lua_Integer step = ivalue(s2v(ra + 1)); - lua_Integer idx = ivalue(s2v(ra + 2)); /* control variable */ - chgivalue(s2v(ra), l_castU2S(count - 1)); /* update counter */ - idx = intop(+, idx, step); /* add step to index */ - chgivalue(s2v(ra + 2), idx); /* update control variable */ - pc -= GETARG_Bx(i); /* jump back */ - } - } - else if (floatforloop(L, ra)) /* float loop */ - pc -= GETARG_Bx(i); /* jump back */ - updatetrap(ci); /* allows a signal to break the loop */ - vmbreak; - } - vmcase(OP_FORPREP) { - StkId ra = RA(i); - savestate(L, ci); /* in case of errors */ - if (forprep(L, ra)) - pc += GETARG_Bx(i) + 1; /* skip the loop */ - vmbreak; - } - vmcase(OP_TFORPREP) { - /* before: 'ra' has the iterator function, 'ra + 1' has the state, - 'ra + 2' has the initial value for the control variable, and - 'ra + 3' has the closing variable. This opcode then swaps the - control and the closing variables and marks the closing variable - as to-be-closed. - */ - StkId ra = RA(i); - TValue temp; /* to swap control and closing variables */ - setobj(L, &temp, s2v(ra + 3)); - setobjs2s(L, ra + 3, ra + 2); - setobj2s(L, ra + 2, &temp); - /* create to-be-closed upvalue (if closing var. is not nil) */ - halfProtect(luaF_newtbcupval(L, ra + 2)); - pc += GETARG_Bx(i); /* go to end of the loop */ - i = *(pc++); /* fetch next instruction */ - lua_assert(GET_OPCODE(i) == OP_TFORCALL && ra == RA(i)); - goto l_tforcall; - } - vmcase(OP_TFORCALL) { - l_tforcall: { - /* 'ra' has the iterator function, 'ra + 1' has the state, - 'ra + 2' has the closing variable, and 'ra + 3' has the control - variable. The call will use the stack starting at 'ra + 3', - so that it preserves the first three values, and the first - return will be the new value for the control variable. - */ - StkId ra = RA(i); - setobjs2s(L, ra + 5, ra + 3); /* copy the control variable */ - setobjs2s(L, ra + 4, ra + 1); /* copy state */ - setobjs2s(L, ra + 3, ra); /* copy function */ - L->top.p = ra + 3 + 3; - ProtectNT(luaD_call(L, ra + 3, GETARG_C(i))); /* do the call */ - updatestack(ci); /* stack may have changed */ - i = *(pc++); /* go to next instruction */ - lua_assert(GET_OPCODE(i) == OP_TFORLOOP && ra == RA(i)); - goto l_tforloop; - }} - vmcase(OP_TFORLOOP) { - l_tforloop: { - StkId ra = RA(i); - if (!ttisnil(s2v(ra + 3))) /* continue loop? */ - pc -= GETARG_Bx(i); /* jump back */ - vmbreak; - }} - vmcase(OP_SETLIST) { - StkId ra = RA(i); - unsigned n = cast_uint(GETARG_vB(i)); - unsigned last = cast_uint(GETARG_vC(i)); - Table *h = hvalue(s2v(ra)); - if (n == 0) - n = cast_uint(L->top.p - ra) - 1; /* get up to the top */ - else - L->top.p = ci->top.p; /* correct top in case of emergency GC */ - last += n; - if (TESTARG_k(i)) { - last += cast_uint(GETARG_Ax(*pc)) * (MAXARG_vC + 1); - pc++; - } - /* when 'n' is known, table should have proper size */ - if (last > h->asize) { /* needs more space? */ - /* fixed-size sets should have space preallocated */ - lua_assert(GETARG_vB(i) == 0); - luaH_resizearray(L, h, last); /* preallocate it at once */ - } - for (; n > 0; n--) { - TValue *val = s2v(ra + n); - obj2arr(h, last - 1, val); - last--; - luaC_barrierback(L, obj2gco(h), val); - } - vmbreak; - } - vmcase(OP_CLOSURE) { - StkId ra = RA(i); - Proto *p = cl->p->p[GETARG_Bx(i)]; - halfProtect(pushclosure(L, p, cl->upvals, base, ra)); - checkGC(L, ra + 1); - vmbreak; - } - vmcase(OP_VARARG) { - StkId ra = RA(i); - int n = GETARG_C(i) - 1; /* required results (-1 means all) */ - int vatab = GETARG_k(i) ? GETARG_B(i) : -1; - Protect(luaT_getvarargs(L, ci, ra, n, vatab)); - vmbreak; - } - vmcase(OP_GETVARG) { - StkId ra = RA(i); - TValue *rc = vRC(i); - luaT_getvararg(ci, ra, rc); - vmbreak; - } - vmcase(OP_ERRNNIL) { - TValue *ra = vRA(i); - if (!ttisnil(ra)) - halfProtect(luaG_errnnil(L, cl, GETARG_Bx(i))); - vmbreak; - } - vmcase(OP_VARARGPREP) { - ProtectNT(luaT_adjustvarargs(L, ci, cl->p)); - if (l_unlikely(trap)) { /* previous "Protect" updated trap */ - luaD_hookcall(L, ci); - L->oldpc = 1; /* next opcode will be seen as a "new" line */ - } - updatebase(ci); /* function has new base after adjustment */ - vmbreak; - } - vmcase(OP_EXTRAARG) { - lua_assert(0); - vmbreak; - } - } - } -} - -/* }================================================================== */ diff --git a/lib/lua/lvm.h b/lib/lua/lvm.h deleted file mode 100644 index be7b9cb..0000000 --- a/lib/lua/lvm.h +++ /dev/null @@ -1,136 +0,0 @@ -/* -** $Id: lvm.h $ -** Lua virtual machine -** See Copyright Notice in lua.h -*/ - -#ifndef lvm_h -#define lvm_h - - -#include "ldo.h" -#include "lobject.h" -#include "ltm.h" - - -#if !defined(LUA_NOCVTN2S) -#define cvt2str(o) ttisnumber(o) -#else -#define cvt2str(o) 0 /* no conversion from numbers to strings */ -#endif - - -#if !defined(LUA_NOCVTS2N) -#define cvt2num(o) ttisstring(o) -#else -#define cvt2num(o) 0 /* no conversion from strings to numbers */ -#endif - - -/* -** You can define LUA_FLOORN2I if you want to convert floats to integers -** by flooring them (instead of raising an error if they are not -** integral values) -*/ -#if !defined(LUA_FLOORN2I) -#define LUA_FLOORN2I F2Ieq -#endif - - -/* -** Rounding modes for float->integer coercion - */ -typedef enum { - F2Ieq, /* no rounding; accepts only integral values */ - F2Ifloor, /* takes the floor of the number */ - F2Iceil /* takes the ceiling of the number */ -} F2Imod; - - -/* convert an object to a float (including string coercion) */ -#define tonumber(o,n) \ - (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n)) - - -/* convert an object to a float (without string coercion) */ -#define tonumberns(o,n) \ - (ttisfloat(o) ? ((n) = fltvalue(o), 1) : \ - (ttisinteger(o) ? ((n) = cast_num(ivalue(o)), 1) : 0)) - - -/* convert an object to an integer (including string coercion) */ -#define tointeger(o,i) \ - (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \ - : luaV_tointeger(o,i,LUA_FLOORN2I)) - - -/* convert an object to an integer (without string coercion) */ -#define tointegerns(o,i) \ - (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \ - : luaV_tointegerns(o,i,LUA_FLOORN2I)) - - -#define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2)) - -#define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2) - - -/* -** fast track for 'gettable' -*/ -#define luaV_fastget(t,k,res,f, tag) \ - (tag = (!ttistable(t) ? LUA_VNOTABLE : f(hvalue(t), k, res))) - - -/* -** Special case of 'luaV_fastget' for integers, inlining the fast case -** of 'luaH_getint'. -*/ -#define luaV_fastgeti(t,k,res,tag) \ - if (!ttistable(t)) tag = LUA_VNOTABLE; \ - else { luaH_fastgeti(hvalue(t), k, res, tag); } - - -#define luaV_fastset(t,k,val,hres,f) \ - (hres = (!ttistable(t) ? HNOTATABLE : f(hvalue(t), k, val))) - -#define luaV_fastseti(t,k,val,hres) \ - if (!ttistable(t)) hres = HNOTATABLE; \ - else { luaH_fastseti(hvalue(t), k, val, hres); } - - -/* -** Finish a fast set operation (when fast set succeeds). -*/ -#define luaV_finishfastset(L,t,v) luaC_barrierback(L, gcvalue(t), v) - - -/* -** Shift right is the same as shift left with a negative 'y' -*/ -#define luaV_shiftr(x,y) luaV_shiftl(x,intop(-, 0, y)) - - - -LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2); -LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r); -LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r); -LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n); -LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode); -LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p, - F2Imod mode); -LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode); -LUAI_FUNC lu_byte luaV_finishget (lua_State *L, const TValue *t, TValue *key, - StkId val, lu_byte tag); -LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key, - TValue *val, int aux); -LUAI_FUNC void luaV_finishOp (lua_State *L); -LUAI_FUNC void luaV_execute (lua_State *L, CallInfo *ci); -LUAI_FUNC void luaV_concat (lua_State *L, int total); -LUAI_FUNC lua_Integer luaV_idiv (lua_State *L, lua_Integer x, lua_Integer y); -LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y); -LUAI_FUNC lua_Number luaV_modf (lua_State *L, lua_Number x, lua_Number y); -LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y); -LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb); - -#endif diff --git a/lib/lua/lzio.c b/lib/lua/lzio.c deleted file mode 100644 index 301df4b..0000000 --- a/lib/lua/lzio.c +++ /dev/null @@ -1,89 +0,0 @@ -/* -** $Id: lzio.c $ -** Buffered streams -** See Copyright Notice in lua.h -*/ - -#define lzio_c -#define LUA_CORE - -#include "lprefix.h" - - -#include - -#include "lua.h" - -#include "lapi.h" -#include "llimits.h" -#include "lmem.h" -#include "lstate.h" -#include "lzio.h" - - -int luaZ_fill (ZIO *z) { - size_t size; - lua_State *L = z->L; - const char *buff; - lua_unlock(L); - buff = z->reader(L, z->data, &size); - lua_lock(L); - if (buff == NULL || size == 0) - return EOZ; - z->n = size - 1; /* discount char being returned */ - z->p = buff; - return cast_uchar(*(z->p++)); -} - - -void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, void *data) { - z->L = L; - z->reader = reader; - z->data = data; - z->n = 0; - z->p = NULL; -} - - -/* --------------------------------------------------------------- read --- */ - -static int checkbuffer (ZIO *z) { - if (z->n == 0) { /* no bytes in buffer? */ - if (luaZ_fill(z) == EOZ) /* try to read more */ - return 0; /* no more input */ - else { - z->n++; /* luaZ_fill consumed first byte; put it back */ - z->p--; - } - } - return 1; /* now buffer has something */ -} - - -size_t luaZ_read (ZIO *z, void *b, size_t n) { - while (n) { - size_t m; - if (!checkbuffer(z)) - return n; /* no more input; return number of missing bytes */ - m = (n <= z->n) ? n : z->n; /* min. between n and z->n */ - memcpy(b, z->p, m); - z->n -= m; - z->p += m; - b = (char *)b + m; - n -= m; - } - return 0; -} - - -const void *luaZ_getaddr (ZIO* z, size_t n) { - const void *res; - if (!checkbuffer(z)) - return NULL; /* no more input */ - if (z->n < n) /* not enough bytes? */ - return NULL; /* block not whole; cannot give an address */ - res = z->p; /* get block address */ - z->n -= n; /* consume these bytes */ - z->p += n; - return res; -} diff --git a/lib/lua/lzio.h b/lib/lua/lzio.h deleted file mode 100644 index 49047c9..0000000 --- a/lib/lua/lzio.h +++ /dev/null @@ -1,67 +0,0 @@ -/* -** $Id: lzio.h $ -** Buffered streams -** See Copyright Notice in lua.h -*/ - - -#ifndef lzio_h -#define lzio_h - -#include "lua.h" - -#include "lmem.h" - - -#define EOZ (-1) /* end of stream */ - -typedef struct Zio ZIO; - -#define zgetc(z) (((z)->n--)>0 ? cast_uchar(*(z)->p++) : luaZ_fill(z)) - - -typedef struct Mbuffer { - char *buffer; - size_t n; - size_t buffsize; -} Mbuffer; - -#define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0) - -#define luaZ_buffer(buff) ((buff)->buffer) -#define luaZ_sizebuffer(buff) ((buff)->buffsize) -#define luaZ_bufflen(buff) ((buff)->n) - -#define luaZ_buffremove(buff,i) ((buff)->n -= cast_sizet(i)) -#define luaZ_resetbuffer(buff) ((buff)->n = 0) - - -#define luaZ_resizebuffer(L, buff, size) \ - ((buff)->buffer = luaM_reallocvchar(L, (buff)->buffer, \ - (buff)->buffsize, size), \ - (buff)->buffsize = size) - -#define luaZ_freebuffer(L, buff) luaZ_resizebuffer(L, buff, 0) - - -LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, - void *data); -LUAI_FUNC size_t luaZ_read (ZIO* z, void *b, size_t n); /* read next n bytes */ - -LUAI_FUNC const void *luaZ_getaddr (ZIO* z, size_t n); - - -/* --------- Private Part ------------------ */ - -struct Zio { - size_t n; /* bytes still unread */ - const char *p; /* current position in buffer */ - lua_Reader reader; /* reader function */ - void *data; /* additional data */ - lua_State *L; /* Lua state (for reader) */ -}; - - -LUAI_FUNC int luaZ_fill (ZIO *z); - -#endif diff --git a/lib/lua/src/Makefile b/lib/lua/src/Makefile new file mode 100644 index 0000000..1ac2ab8 --- /dev/null +++ b/lib/lua/src/Makefile @@ -0,0 +1,66 @@ +# makefile for lua distribution (main library) + +LUA= .. + +include $(LUA)/config + +OBJS= fallback.o\ + func.o\ + hash.o\ + inout.o\ + lex.o\ + mem.o\ + opcode.o\ + parser.o\ + table.o\ + tree.o\ + undump.o + +SRCS= fallback.c\ + fallback.h\ + func.c\ + func.h\ + hash.c\ + hash.h\ + inout.c\ + inout.h\ + lex.c\ + lex.h\ + mem.c\ + mem.h\ + opcode.c\ + opcode.h\ + parser.c\ + parser.h\ + table.c\ + table.h\ + tree.c\ + tree.h\ + types.h\ + undump.c\ + undump.h\ + lua.stx + +SLIB= $(LIB)/liblua.a + +all: $(SLIB) + +$(SLIB): $(OBJS) + ar rcu $@ $(OBJS) + $(RANLIB) $@ + +clean: + rm -f $(OBJS) $(SLIB) + +co: + co -f -M $(SRCS) + +parser: + yacc -d lua.stx + rm -f parser.c parser.h + sed -e 's/yy/luaY_/g' y.tab.c > parser.c + sed -e 's/yy/luaY_/g' y.tab.h > parser.h + rm y.tab.c y.tab.h + +klean: clean + rm -f $(SRCS) diff --git a/lib/lua/src/fallback.c b/lib/lua/src/fallback.c new file mode 100644 index 0000000..5718f5c --- /dev/null +++ b/lib/lua/src/fallback.c @@ -0,0 +1,191 @@ +/* +** fallback.c +** TecCGraf - PUC-Rio +*/ + +char *rcs_fallback="$Id: fallback.c,v 1.25 1996/04/25 14:10:00 roberto Exp $"; + +#include +#include + +#include "mem.h" +#include "fallback.h" +#include "opcode.h" +#include "lua.h" +#include "table.h" + + +static void errorFB (void); +static void indexFB (void); +static void gettableFB (void); +static void arithFB (void); +static void concatFB (void); +static void orderFB (void); +static void GDFB (void); +static void funcFB (void); + + +/* +** Warning: This list must be in the same order as the #define's +*/ +struct FB luaI_fallBacks[] = { +{"error", {LUA_T_CFUNCTION, {errorFB}}, 1, 0}, +{"index", {LUA_T_CFUNCTION, {indexFB}}, 2, 1}, +{"gettable", {LUA_T_CFUNCTION, {gettableFB}}, 2, 1}, +{"arith", {LUA_T_CFUNCTION, {arithFB}}, 3, 1}, +{"order", {LUA_T_CFUNCTION, {orderFB}}, 3, 1}, +{"concat", {LUA_T_CFUNCTION, {concatFB}}, 2, 1}, +{"settable", {LUA_T_CFUNCTION, {gettableFB}}, 3, 0}, +{"gc", {LUA_T_CFUNCTION, {GDFB}}, 1, 0}, +{"function", {LUA_T_CFUNCTION, {funcFB}}, -1, -1}, + /* no fixed number of params or results */ +{"getglobal", {LUA_T_CFUNCTION, {indexFB}}, 1, 1} + /* same default behavior of index FB */ +}; + +#define N_FB (sizeof(luaI_fallBacks)/sizeof(struct FB)) + +void luaI_setfallback (void) +{ + int i; + char *name = lua_getstring(lua_getparam(1)); + lua_Object func = lua_getparam(2); + if (name == NULL || !lua_isfunction(func)) + lua_error("incorrect argument to function `setfallback'"); + for (i=0; i= 0 && ref < refSize) + refArray[ref].status = FREE; +} + + +Object *luaI_getref (int ref) +{ + static Object nul = {LUA_T_NIL, {0}}; + if (ref == -1) + return &nul; + if (ref >= 0 && ref < refSize && + (refArray[ref].status == LOCK || refArray[ref].status == HOLD)) + return &refArray[ref].o; + else + return NULL; +} + + +void luaI_travlock (int (*fn)(Object *)) +{ + int i; + for (i=0; i + +#include "luadebug.h" +#include "table.h" +#include "mem.h" +#include "func.h" +#include "opcode.h" + + +static TFunc *function_root = NULL; +static LocVar *currvars = NULL; +static int numcurrvars = 0; +static int maxcurrvars = 0; + + +/* +** Initialize TFunc struct +*/ +void luaI_initTFunc (TFunc *f) +{ + f->next = NULL; + f->marked = 0; + f->size = 0; + f->code = NULL; + f->lineDefined = 0; + f->fileName = NULL; + f->locvars = NULL; +} + +/* +** Insert function in list for GC +*/ +void luaI_insertfunction (TFunc *f) +{ + lua_pack(); + f->next = function_root; + function_root = f; + f->marked = 0; +} + + +/* +** Free function +*/ +void luaI_freefunc (TFunc *f) +{ + luaI_free (f->code); + luaI_free (f->locvars); + luaI_free (f); +} + +/* +** Garbage collection function. +** This function traverse the function list freeing unindexed functions +*/ +Long luaI_funccollector (void) +{ + TFunc *curr = function_root; + TFunc *prev = NULL; + Long counter = 0; + while (curr) + { + TFunc *next = curr->next; + if (!curr->marked) + { + if (prev == NULL) + function_root = next; + else + prev->next = next; + luaI_freefunc (curr); + ++counter; + } + else + { + curr->marked = 0; + prev = curr; + } + curr = next; + } + return counter; +} + + +void lua_funcinfo (lua_Object func, char **filename, int *linedefined) +{ + Object *f = luaI_Address(func); + if (f->tag == LUA_T_MARK || f->tag == LUA_T_FUNCTION) + { + *filename = f->value.tf->fileName; + *linedefined = f->value.tf->lineDefined; + } + else if (f->tag == LUA_T_CMARK || f->tag == LUA_T_CFUNCTION) + { + *filename = "(C)"; + *linedefined = -1; + } +} + +/* +** Stores information to know that variable has been declared in given line +*/ +void luaI_registerlocalvar (TaggedString *varname, int line) +{ + if (numcurrvars >= maxcurrvars) + maxcurrvars = growvector(&currvars, maxcurrvars, LocVar, "", MAX_WORD); + currvars[numcurrvars].varname = varname; + currvars[numcurrvars].line = line; + numcurrvars++; +} + +/* +** Stores information to know that variable has been out of scope in given line +*/ +void luaI_unregisterlocalvar (int line) +{ + luaI_registerlocalvar(NULL, line); +} + +/* +** Copies "currvars" into a new area and store it in function header. +** The values (varname = NULL, line = -1) signal the end of vector. +*/ +void luaI_closelocalvars (TFunc *func) +{ + func->locvars = newvector (numcurrvars+1, LocVar); + memcpy (func->locvars, currvars, numcurrvars*sizeof(LocVar)); + func->locvars[numcurrvars].varname = NULL; + func->locvars[numcurrvars].line = -1; + numcurrvars = 0; /* prepares for next function */ +} + +/* +** Look for n-esim local variable at line "line" in function "func". +** Returns NULL if not found. +*/ +char *luaI_getlocalname (TFunc *func, int local_number, int line) +{ + int count = 0; + char *varname = NULL; + LocVar *lv = func->locvars; + if (lv == NULL) + return NULL; + for (; lv->line != -1 && lv->line < line; lv++) + { + if (lv->varname) /* register */ + { + if (++count == local_number) + varname = lv->varname->str; + } + else /* unregister */ + if (--count < local_number) + varname = NULL; + } + return varname; +} + diff --git a/lib/lua/src/func.h b/lib/lua/src/func.h new file mode 100644 index 0000000..2ee1210 --- /dev/null +++ b/lib/lua/src/func.h @@ -0,0 +1,44 @@ +/* +** $Id: func.h,v 1.8 1996/03/14 15:54:20 roberto Exp $ +*/ + +#ifndef func_h +#define func_h + +#include "types.h" +#include "lua.h" +#include "tree.h" + +typedef struct LocVar +{ + TaggedString *varname; /* NULL signals end of scope */ + int line; +} LocVar; + + +/* +** Function Headers +*/ +typedef struct TFunc +{ + struct TFunc *next; + int marked; + int size; + Byte *code; + int lineDefined; + char *fileName; + LocVar *locvars; +} TFunc; + +Long luaI_funccollector (void); +void luaI_insertfunction (TFunc *f); + +void luaI_initTFunc (TFunc *f); +void luaI_freefunc (TFunc *f); + +void luaI_registerlocalvar (TaggedString *varname, int line); +void luaI_unregisterlocalvar (int line); +void luaI_closelocalvars (TFunc *func); +char *luaI_getlocalname (TFunc *func, int local_number, int line); + +#endif diff --git a/lib/lua/src/hash.c b/lib/lua/src/hash.c new file mode 100644 index 0000000..19ae7b1 --- /dev/null +++ b/lib/lua/src/hash.c @@ -0,0 +1,319 @@ +/* +** hash.c +** hash manager for lua +*/ + +char *rcs_hash="$Id: hash.c,v 2.32 1996/11/18 13:48:44 roberto Exp $"; + + +#include "mem.h" +#include "opcode.h" +#include "hash.h" +#include "table.h" +#include "lua.h" + + +#define nhash(t) ((t)->nhash) +#define nuse(t) ((t)->nuse) +#define markarray(t) ((t)->mark) +#define nodevector(t) ((t)->node) +#define node(t,i) (&(t)->node[i]) +#define ref(n) (&(n)->ref) +#define val(n) (&(n)->val) + + +#define REHASH_LIMIT 0.70 /* avoid more than this % full */ + + +static Hash *listhead = NULL; + + +/* hash dimensions values */ +static Long dimensions[] = + {3L, 5L, 7L, 11L, 23L, 47L, 97L, 197L, 397L, 797L, 1597L, 3203L, 6421L, + 12853L, 25717L, 51437L, 102811L, 205619L, 411233L, 822433L, + 1644817L, 3289613L, 6579211L, 13158023L, MAX_INT}; + +int luaI_redimension (int nhash) +{ + int i; + for (i=0; dimensions[i] nhash) + return dimensions[i]; + } + lua_error("table overflow"); + return 0; /* to avoid warnings */ +} + +static int hashindex (Hash *t, Object *ref) /* hash function */ +{ + long int h; + switch (tag(ref)) { + case LUA_T_NIL: + lua_error ("unexpected type to index table"); + h = 0; /* UNREACHEABLE */ + case LUA_T_NUMBER: + h = (long int)nvalue(ref); break; + case LUA_T_STRING: + h = tsvalue(ref)->hash; break; + case LUA_T_FUNCTION: + h = (IntPoint)ref->value.tf; break; + case LUA_T_CFUNCTION: + h = (IntPoint)fvalue(ref); break; + case LUA_T_ARRAY: + h = (IntPoint)avalue(ref); break; + default: /* user data */ + h = (IntPoint)uvalue(ref); break; + } + if (h < 0) h = -h; + return h%nhash(t); /* make it a valid index */ +} + +int lua_equalObj (Object *t1, Object *t2) +{ + if (tag(t1) != tag(t2)) return 0; + switch (tag(t1)) + { + case LUA_T_NIL: return 1; + case LUA_T_NUMBER: return nvalue(t1) == nvalue(t2); + case LUA_T_STRING: return svalue(t1) == svalue(t2); + case LUA_T_ARRAY: return avalue(t1) == avalue(t2); + case LUA_T_FUNCTION: return t1->value.tf == t2->value.tf; + case LUA_T_CFUNCTION: return fvalue(t1) == fvalue(t2); + default: return uvalue(t1) == uvalue(t2); + } +} + +static int present (Hash *t, Object *ref) +{ + int h = hashindex(t, ref); + while (tag(ref(node(t, h))) != LUA_T_NIL) + { + if (lua_equalObj(ref, ref(node(t, h)))) + return h; + h = (h+1) % nhash(t); + } + return h; +} + + +/* +** Alloc a vector node +*/ +static Node *hashnodecreate (int nhash) +{ + int i; + Node *v = newvector (nhash, Node); + for (i=0; iref); + lua_markobject(&n->val); + } + } + } +} + + +static void call_fallbacks (void) +{ + Hash *curr_array; + Object t; + tag(&t) = LUA_T_ARRAY; + for (curr_array = listhead; curr_array; curr_array = curr_array->next) + if (markarray(curr_array) != 1) + { + avalue(&t) = curr_array; + luaI_gcFB(&t); + } + tag(&t) = LUA_T_NIL; + luaI_gcFB(&t); /* end of list */ +} + + +/* +** Garbage collection to arrays +** Delete all unmarked arrays. +*/ +Long lua_hashcollector (void) +{ + Hash *curr_array = listhead, *prev = NULL; + Long counter = 0; + call_fallbacks(); + while (curr_array != NULL) + { + Hash *next = curr_array->next; + if (markarray(curr_array) != 1) + { + if (prev == NULL) listhead = next; + else prev->next = next; + hashdelete(curr_array); + ++counter; + } + else + { + markarray(curr_array) = 0; + prev = curr_array; + } + curr_array = next; + } + return counter; +} + + +/* +** Create a new array +** This function inserts the new array in the array list. It also +** executes garbage collection if the number of arrays created +** exceed a pre-defined range. +*/ +Hash *lua_createarray (int nhash) +{ + Hash *array; + lua_pack(); + array = hashcreate(nhash); + array->next = listhead; + listhead = array; + return array; +} + + +/* +** Re-hash +*/ +static void rehash (Hash *t) +{ + int i; + int nold = nhash(t); + Node *vold = nodevector(t); + nhash(t) = luaI_redimension(nhash(t)); + nodevector(t) = hashnodecreate(nhash(t)); + for (i=0; i (float)nhash(t)*REHASH_LIMIT) + { + rehash(t); + h = present(t, ref); + n = node(t, h); + } + *ref(n) = *ref; + tag(val(n)) = LUA_T_NIL; + } + return (val(n)); +} + + +/* +** Internal function to manipulate arrays. +** Given an array object and a reference value, return the next element +** in the hash. +** This function pushs the element value and its reference to the stack. +*/ +static void hashnext (Hash *t, int i) +{ + if (i >= nhash(t)) + return; + while (tag(ref(node(t,i))) == LUA_T_NIL || tag(val(node(t,i))) == LUA_T_NIL) + { + if (++i >= nhash(t)) + return; + } + luaI_pushobject(ref(node(t,i))); + luaI_pushobject(val(node(t,i))); +} + +void lua_next (void) +{ + Hash *t; + lua_Object o = lua_getparam(1); + lua_Object r = lua_getparam(2); + if (o == LUA_NOOBJECT || r == LUA_NOOBJECT) + lua_error ("too few arguments to function `next'"); + if (lua_getparam(3) != LUA_NOOBJECT) + lua_error ("too many arguments to function `next'"); + if (!lua_istable(o)) + lua_error ("first argument of function `next' is not a table"); + t = avalue(luaI_Address(o)); + if (lua_isnil(r)) + { + hashnext(t, 0); + } + else + { + int h = present (t, luaI_Address(r)); + hashnext(t, h+1); + } +} diff --git a/lib/lua/src/hash.h b/lib/lua/src/hash.h new file mode 100644 index 0000000..c2b5201 --- /dev/null +++ b/lib/lua/src/hash.h @@ -0,0 +1,38 @@ +/* +** hash.h +** hash manager for lua +** $Id: hash.h,v 2.12 1996/05/06 14:30:27 roberto Exp $ +*/ + +#ifndef hash_h +#define hash_h + +#include "types.h" +#include "opcode.h" + +typedef struct node +{ + Object ref; + Object val; +} Node; + +typedef struct Hash +{ + struct Hash *next; + Node *node; + int nhash; + int nuse; + char mark; +} Hash; + + +int lua_equalObj (Object *t1, Object *t2); +int luaI_redimension (int nhash); +Hash *lua_createarray (int nhash); +void lua_hashmark (Hash *h); +Long lua_hashcollector (void); +Object *lua_hashget (Hash *t, Object *ref); +Object *lua_hashdefine (Hash *t, Object *ref); +void lua_next (void); + +#endif diff --git a/lib/lua/src/inout.c b/lib/lua/src/inout.c new file mode 100644 index 0000000..0aa551c --- /dev/null +++ b/lib/lua/src/inout.c @@ -0,0 +1,300 @@ +/* +** inout.c +** Provide function to realise the input/output function and debugger +** facilities. +** Also provides some predefined lua functions. +*/ + +char *rcs_inout="$Id: inout.c,v 2.43 1996/09/25 12:57:22 roberto Exp $"; + +#include +#include + +#include "lex.h" +#include "opcode.h" +#include "inout.h" +#include "table.h" +#include "tree.h" +#include "lua.h" +#include "mem.h" + + +/* Exported variables */ +Word lua_linenumber; +char *lua_parsedfile; + + +static FILE *fp; +static char *st; + +/* +** Function to get the next character from the input file +*/ +static int fileinput (void) +{ + int c = fgetc(fp); + return (c == EOF) ? 0 : c; +} + +/* +** Function to get the next character from the input string +*/ +static int stringinput (void) +{ + return *st++; +} + +/* +** Function to open a file to be input unit. +** Return the file. +*/ +FILE *lua_openfile (char *fn) +{ + lua_setinput (fileinput); + if (fn == NULL) + { + fp = stdin; + fn = "(stdin)"; + } + else + fp = fopen (fn, "r"); + if (fp == NULL) + return NULL; + lua_parsedfile = luaI_createfixedstring(fn)->str; + return fp; +} + +/* +** Function to close an opened file +*/ +void lua_closefile (void) +{ + if (fp != NULL && fp != stdin) + { + fclose (fp); + fp = NULL; + } +} + +/* +** Function to open a string to be input unit +*/ +#define SIZE_PREF 20 /* size of string prefix to appear in error messages */ +void lua_openstring (char *s) +{ + char buff[SIZE_PREF+25]; + lua_setinput(stringinput); + st = s; + strcpy(buff, "(dostring) >> "); + strncat(buff, s, SIZE_PREF); + if (strlen(s) > SIZE_PREF) strcat(buff, "..."); + lua_parsedfile = luaI_createfixedstring(buff)->str; +} + +/* +** Function to close an opened string +*/ +void lua_closestring (void) +{ +} + + +static void check_arg (int cond, char *func) +{ + if (!cond) + { + char buff[100]; + sprintf(buff, "incorrect argument to function `%s'", func); + lua_error(buff); + } +} + + +static int passresults (void) +{ + int arg = 0; + lua_Object obj; + while ((obj = lua_getresult(++arg)) != LUA_NOOBJECT) + lua_pushobject(obj); + return arg-1; +} + +/* +** Internal function: do a string +*/ +void lua_internaldostring (void) +{ + lua_Object obj = lua_getparam (1); + if (lua_isstring(obj) && lua_dostring(lua_getstring(obj)) == 0) + if (passresults() == 0) + lua_pushuserdata(NULL); /* at least one result to signal no errors */ +} + +/* +** Internal function: do a file +*/ +void lua_internaldofile (void) +{ + lua_Object obj = lua_getparam (1); + char *fname = NULL; + if (lua_isstring(obj)) + fname = lua_getstring(obj); + else if (obj != LUA_NOOBJECT) + lua_error("invalid argument to function `dofile'"); + /* else fname = NULL */ + if (lua_dofile(fname) == 0) + if (passresults() == 0) + lua_pushuserdata(NULL); /* at least one result to signal no errors */ +} + + +static char *tostring (lua_Object obj) +{ + char *buff = luaI_buffer(20); + if (lua_isstring(obj)) /* get strings and numbers */ + return lua_getstring(obj); + else switch(lua_type(obj)) + { + case LUA_T_FUNCTION: + sprintf(buff, "function: %p", (luaI_Address(obj))->value.tf); + break; + case LUA_T_CFUNCTION: + sprintf(buff, "cfunction: %p", lua_getcfunction(obj)); + break; + case LUA_T_ARRAY: + sprintf(buff, "table: %p", avalue(luaI_Address(obj))); + break; + case LUA_T_NIL: + sprintf(buff, "nil"); + break; + default: + sprintf(buff, "userdata: %p", lua_getuserdata(obj)); + break; + } + return buff; +} + +void luaI_tostring (void) +{ + lua_pushstring(tostring(lua_getparam(1))); +} + +void luaI_print (void) +{ + int i = 1; + lua_Object obj; + while ((obj = lua_getparam(i++)) != LUA_NOOBJECT) + printf("%s\n", tostring(obj)); +} + +/* +** Internal function: return an object type. +*/ +void luaI_type (void) +{ + lua_Object o = lua_getparam(1); + int t; + if (o == LUA_NOOBJECT) + lua_error("no parameter to function 'type'"); + t = lua_type(o); + switch (t) + { + case LUA_T_NIL : + lua_pushliteral("nil"); + break; + case LUA_T_NUMBER : + lua_pushliteral("number"); + break; + case LUA_T_STRING : + lua_pushliteral("string"); + break; + case LUA_T_ARRAY : + lua_pushliteral("table"); + break; + case LUA_T_FUNCTION : + case LUA_T_CFUNCTION : + lua_pushliteral("function"); + break; + default : + lua_pushliteral("userdata"); + break; + } + lua_pushnumber(t); +} + +/* +** Internal function: convert an object to a number +*/ +void lua_obj2number (void) +{ + lua_Object o = lua_getparam(1); + if (lua_isnumber(o)) + lua_pushnumber(lua_getnumber(o)); +} + + +void luaI_error (void) +{ + char *s = lua_getstring(lua_getparam(1)); + if (s == NULL) s = "(no message)"; + lua_error(s); +} + +void luaI_assert (void) +{ + lua_Object p = lua_getparam(1); + if (p == LUA_NOOBJECT || lua_isnil(p)) + lua_error("assertion failed!"); +} + +void luaI_setglobal (void) +{ + lua_Object name = lua_getparam(1); + lua_Object value = lua_getparam(2); + check_arg(lua_isstring(name), "setglobal"); + lua_pushobject(value); + lua_storeglobal(lua_getstring(name)); + lua_pushobject(value); /* return given value */ +} + +void luaI_getglobal (void) +{ + lua_Object name = lua_getparam(1); + check_arg(lua_isstring(name), "getglobal"); + lua_pushobject(lua_getglobal(lua_getstring(name))); +} + +#define MAXPARAMS 256 +void luaI_call (void) +{ + lua_Object f = lua_getparam(1); + lua_Object arg = lua_getparam(2); + lua_Object temp, params[MAXPARAMS]; + int narg, i; + check_arg(lua_istable(arg), "call"); + check_arg(lua_isfunction(f), "call"); + /* narg = arg.n */ + lua_pushobject(arg); + lua_pushstring("n"); + temp = lua_getsubscript(); + narg = lua_isnumber(temp) ? lua_getnumber(temp) : MAXPARAMS+1; + /* read arg[1...n] */ + for (i=0; i=MAXPARAMS) + lua_error("argument list too long in function `call'"); + lua_pushobject(arg); + lua_pushnumber(i+1); + params[i] = lua_getsubscript(); + if (narg == MAXPARAMS+1 && lua_isnil(params[i])) { + narg = i; + break; + } + } + /* push parameters and do the call */ + for (i=0; i + + +extern Word lua_linenumber; +extern Word lua_debugline; +extern char *lua_parsedfile; + +FILE *lua_openfile (char *fn); +void lua_closefile (void); +void lua_openstring (char *s); +void lua_closestring (void); + +void lua_internaldofile (void); +void lua_internaldostring (void); +void luaI_tostring (void); +void luaI_print (void); +void luaI_type (void); +void lua_obj2number (void); +void luaI_error (void); +void luaI_assert (void); +void luaI_setglobal (void); +void luaI_getglobal (void); +void luaI_call (void); + +#endif diff --git a/lib/lua/src/lex.c b/lib/lua/src/lex.c new file mode 100644 index 0000000..bd3233a --- /dev/null +++ b/lib/lua/src/lex.c @@ -0,0 +1,341 @@ +char *rcs_lex = "$Id: lex.c,v 2.39 1996/11/08 19:08:30 roberto Exp $"; + + +#include +#include + +#include "mem.h" +#include "tree.h" +#include "table.h" +#include "lex.h" +#include "inout.h" +#include "luadebug.h" +#include "parser.h" + +#define MINBUFF 260 + +#define next() (current = input()) +#define save(x) (yytext[tokensize++] = (x)) +#define save_and_next() (save(current), next()) + + +static int current; /* look ahead character */ +static Input input; /* input function */ + + +void lua_setinput (Input fn) +{ + current = '\n'; + lua_linenumber = 0; + input = fn; +} + +void luaI_syntaxerror (char *s) +{ + char msg[256]; + char *token = luaI_buffer(1); + if (token[0] == 0) + token = ""; + sprintf (msg,"%s;\n> last token read: \"%s\" at line %d in file %s", + s, token, lua_linenumber, lua_parsedfile); + lua_error (msg); +} + + +static struct + { + char *name; + int token; + } reserved [] = { + {"and", AND}, + {"do", DO}, + {"else", ELSE}, + {"elseif", ELSEIF}, + {"end", END}, + {"function", FUNCTION}, + {"if", IF}, + {"local", LOCAL}, + {"nil", NIL}, + {"not", NOT}, + {"or", OR}, + {"repeat", REPEAT}, + {"return", RETURN}, + {"then", THEN}, + {"until", UNTIL}, + {"while", WHILE} }; + + +#define RESERVEDSIZE (sizeof(reserved)/sizeof(reserved[0])) + + +void luaI_addReserved (void) +{ + int i; + for (i=0; imarked = reserved[i].token; /* reserved word (always > 255) */ + } +} + +static int inclinenumber (int pragma_allowed) +{ + ++lua_linenumber; + if (pragma_allowed && current == '$') { /* is a pragma? */ + char *buff = luaI_buffer(MINBUFF+1); + int i = 0; + next(); /* skip $ */ + while (isalnum(current)) { + if (i >= MINBUFF) luaI_syntaxerror("pragma too long"); + buff[i++] = current; + next(); + } + buff[i] = 0; + if (strcmp(buff, "debug") == 0) + lua_debug = 1; + else if (strcmp(buff, "nodebug") == 0) + lua_debug = 0; + else luaI_syntaxerror("invalid pragma"); + } + return lua_linenumber; +} + +static int read_long_string (char *yytext, int buffsize) +{ + int cont = 0; + int tokensize = 2; /* '[[' already stored */ + while (1) + { + if (buffsize-tokensize <= 2) /* may read more than 1 char in one cicle */ + yytext = luaI_buffer(buffsize *= 2); + switch (current) + { + case 0: + save(0); + return WRONGTOKEN; + case '[': + save_and_next(); + if (current == '[') + { + cont++; + save_and_next(); + } + continue; + case ']': + save_and_next(); + if (current == ']') + { + if (cont == 0) goto endloop; + cont--; + save_and_next(); + } + continue; + case '\n': + save_and_next(); + inclinenumber(0); + continue; + default: + save_and_next(); + } + } endloop: + save_and_next(); /* pass the second ']' */ + yytext[tokensize-2] = 0; /* erases ']]' */ + luaY_lval.vWord = luaI_findconstantbyname(yytext+2); + yytext[tokensize-2] = ']'; /* restores ']]' */ + save(0); + return STRING; +} + +int luaY_lex (void) +{ + static int linelasttoken = 0; + double a; + int buffsize = MINBUFF; + char *yytext = luaI_buffer(buffsize); + yytext[1] = yytext[2] = yytext[3] = 0; + if (lua_debug) + luaI_codedebugline(linelasttoken); + linelasttoken = lua_linenumber; + while (1) + { + int tokensize = 0; + switch (current) + { + case '\n': + next(); + linelasttoken = inclinenumber(1); + continue; + + case ' ': case '\t': case '\r': /* CR: to avoid problems with DOS */ + next(); + continue; + + case '-': + save_and_next(); + if (current != '-') return '-'; + do { next(); } while (current != '\n' && current != 0); + continue; + + case '[': + save_and_next(); + if (current != '[') return '['; + else + { + save_and_next(); /* pass the second '[' */ + return read_long_string(yytext, buffsize); + } + + case '=': + save_and_next(); + if (current != '=') return '='; + else { save_and_next(); return EQ; } + + case '<': + save_and_next(); + if (current != '=') return '<'; + else { save_and_next(); return LE; } + + case '>': + save_and_next(); + if (current != '=') return '>'; + else { save_and_next(); return GE; } + + case '~': + save_and_next(); + if (current != '=') return '~'; + else { save_and_next(); return NE; } + + case '"': + case '\'': + { + int del = current; + save_and_next(); + while (current != del) + { + if (buffsize-tokensize <= 2) /* may read more than 1 char in one cicle */ + yytext = luaI_buffer(buffsize *= 2); + switch (current) + { + case 0: + case '\n': + save(0); + return WRONGTOKEN; + case '\\': + next(); /* do not save the '\' */ + switch (current) + { + case 'n': save('\n'); next(); break; + case 't': save('\t'); next(); break; + case 'r': save('\r'); next(); break; + case '\n': save_and_next(); inclinenumber(0); break; + default : save_and_next(); break; + } + break; + default: + save_and_next(); + } + } + next(); /* skip delimiter */ + save(0); + luaY_lval.vWord = luaI_findconstantbyname(yytext+1); + tokensize--; + save(del); save(0); /* restore delimiter */ + return STRING; + } + + case 'a': case 'b': case 'c': case 'd': case 'e': + case 'f': case 'g': case 'h': case 'i': case 'j': + case 'k': case 'l': case 'm': case 'n': case 'o': + case 'p': case 'q': case 'r': case 's': case 't': + case 'u': case 'v': case 'w': case 'x': case 'y': + case 'z': + case 'A': case 'B': case 'C': case 'D': case 'E': + case 'F': case 'G': case 'H': case 'I': case 'J': + case 'K': case 'L': case 'M': case 'N': case 'O': + case 'P': case 'Q': case 'R': case 'S': case 'T': + case 'U': case 'V': case 'W': case 'X': case 'Y': + case 'Z': + case '_': + { + TaggedString *ts; + do { save_and_next(); } while (isalnum(current) || current == '_'); + save(0); + ts = lua_createstring(yytext); + if (ts->marked > 2) + return ts->marked; /* reserved word */ + luaY_lval.pTStr = ts; + ts->marked = 2; /* avoid GC */ + return NAME; + } + + case '.': + save_and_next(); + if (current == '.') + { + save_and_next(); + if (current == '.') + { + save_and_next(); + return DOTS; /* ... */ + } + else return CONC; /* .. */ + } + else if (!isdigit(current)) return '.'; + /* current is a digit: goes through to number */ + a=0.0; + goto fraction; + + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + a=0.0; + do { + a=10.0*a+(current-'0'); + save_and_next(); + } while (isdigit(current)); + if (current == '.') { + save_and_next(); + if (current == '.') + luaI_syntaxerror( + "ambiguous syntax (decimal point x string concatenation)"); + } + fraction: + { double da=0.1; + while (isdigit(current)) + { + a+=(current-'0')*da; + da/=10.0; + save_and_next(); + } + if (current == 'e' || current == 'E') + { + int e=0; + int neg; + double ea; + save_and_next(); + neg=(current=='-'); + if (current == '+' || current == '-') save_and_next(); + if (!isdigit(current)) { save(0); return WRONGTOKEN; } + do { + e=10.0*e+(current-'0'); + save_and_next(); + } while (isdigit(current)); + for (ea=neg?0.1:10.0; e>0; e>>=1) + { + if (e & 1) a*=ea; + ea*=ea; + } + } + luaY_lval.vFloat = a; + save(0); + return NUMBER; + } + + default: /* also end of program (0) */ + { + save_and_next(); + return yytext[0]; + } + } + } +} + diff --git a/lib/lua/src/lex.h b/lib/lua/src/lex.h new file mode 100644 index 0000000..5245d06 --- /dev/null +++ b/lib/lua/src/lex.h @@ -0,0 +1,19 @@ +/* +** lex.h +** TecCGraf - PUC-Rio +** $Id: lex.h,v 1.3 1996/11/08 12:49:35 roberto Exp $ +*/ + +#ifndef lex_h +#define lex_h + + +typedef int (*Input) (void); + +void lua_setinput (Input fn); +void luaI_syntaxerror (char *s); +int luaY_lex (void); +void luaI_addReserved (void); + + +#endif diff --git a/lib/lua/src/lua.stx b/lib/lua/src/lua.stx new file mode 100644 index 0000000..0075260 --- /dev/null +++ b/lib/lua/src/lua.stx @@ -0,0 +1,796 @@ +%{ + +char *rcs_luastx = "$Id: lua.stx,v 3.41 1996/11/08 12:49:35 roberto Exp $"; + +#include +#include +#include + +#include "luadebug.h" +#include "mem.h" +#include "lex.h" +#include "opcode.h" +#include "hash.h" +#include "inout.h" +#include "tree.h" +#include "table.h" +#include "lua.h" +#include "func.h" + +/* to avoid warnings generated by yacc */ +int yyparse (void); +#define malloc luaI_malloc +#define realloc luaI_realloc +#define free luaI_free + +#ifndef LISTING +#define LISTING 0 +#endif + +#ifndef CODE_BLOCK +#define CODE_BLOCK 256 +#endif +static int maxcode; +static int maxmain; +static int maxcurr; +static Byte *funcCode = NULL; +static Byte **initcode; +static Byte *basepc; +static int maincode; +static int pc; + + +#define MAXVAR 32 +static Long varbuffer[MAXVAR]; /* variables in an assignment list; + it's long to store negative Word values */ +static int nvarbuffer=0; /* number of variables at a list */ + +#define MAXLOCALS 32 +static TaggedString *localvar[MAXLOCALS]; /* store local variable names */ +static int nlocalvar=0; /* number of local variables */ + +#define MAXFIELDS FIELDS_PER_FLUSH*2 +static Word fields[MAXFIELDS]; /* fieldnames to be flushed */ +static int nfields=0; + +int lua_debug = 0; + +/* Internal functions */ + +static void yyerror (char *s) +{ + luaI_syntaxerror(s); +} + +static void check_space (int i) +{ + if (pc+i>maxcurr-1) /* 1 byte free to code HALT of main code */ + maxcurr = growvector(&basepc, maxcurr, Byte, codeEM, MAX_INT); +} + +static void code_byte (Byte c) +{ + check_space(1); + basepc[pc++] = c; +} + +static void code_word (Word n) +{ + check_space(sizeof(Word)); + memcpy(basepc+pc, &n, sizeof(Word)); + pc += sizeof(Word); +} + +static void code_float (real n) +{ + check_space(sizeof(real)); + memcpy(basepc+pc, &n, sizeof(real)); + pc += sizeof(real); +} + +static void code_code (TFunc *tf) +{ + check_space(sizeof(TFunc *)); + memcpy(basepc+pc, &tf, sizeof(TFunc *)); + pc += sizeof(TFunc *); +} + +static void code_word_at (Byte *p, int n) +{ + Word w = n; + if (w != n) + yyerror("block too big"); + memcpy(p, &w, sizeof(Word)); +} + +static void push_field (Word name) +{ + if (nfields < MAXFIELDS) + fields[nfields++] = name; + else + yyerror ("too many fields in nested constructors"); +} + +static void flush_record (int n) +{ + int i; + if (n == 0) return; + code_byte(STORERECORD); + code_byte(n); + for (i=0; i= 0; i--) + if (n == localvar[i]) return i; /* local var */ + return -1; /* global var */ +} + +/* +** Push a variable given a number. If number is positive, push global variable +** indexed by (number -1). If negative, push local indexed by ABS(number)-1. +** Otherwise, if zero, push indexed variable (record). +*/ +static void lua_pushvar (Long number) +{ + if (number > 0) /* global var */ + { + code_byte(PUSHGLOBAL); + code_word(number-1); + } + else if (number < 0) /* local var */ + { + number = (-number) - 1; + if (number < 10) code_byte(PUSHLOCAL0 + number); + else + { + code_byte(PUSHLOCAL); + code_byte(number); + } + } + else + { + code_byte(PUSHINDEXED); + } +} + +static void lua_codeadjust (int n) +{ + if (n+nlocalvar == 0) + code_byte(ADJUST0); + else + { + code_byte(ADJUST); + code_byte(n+nlocalvar); + } +} + +static void change2main (void) +{ + /* (re)store main values */ + pc=maincode; basepc=*initcode; maxcurr=maxmain; + nlocalvar=0; +} + +static void savemain (void) +{ + /* save main values */ + maincode=pc; *initcode=basepc; maxmain=maxcurr; +} + +static void init_func (void) +{ + if (funcCode == NULL) /* first function */ + { + funcCode = newvector(CODE_BLOCK, Byte); + maxcode = CODE_BLOCK; + } + savemain(); /* save main values */ + /* set func values */ + pc=0; basepc=funcCode; maxcurr=maxcode; + nlocalvar = 0; + luaI_codedebugline(lua_linenumber); +} + +static void codereturn (void) +{ + if (nlocalvar == 0) + code_byte(RETCODE0); + else + { + code_byte(RETCODE); + code_byte(nlocalvar); + } +} + +void luaI_codedebugline (int line) +{ + static int lastline = 0; + if (lua_debug && line != lastline) + { + code_byte(SETLINE); + code_word(line); + lastline = line; + } +} + +static int adjust_functioncall (Long exp, int i) +{ + if (exp <= 0) + return -exp; /* exp is -list length */ + else + { + int temp = basepc[exp]; + basepc[exp] = i; + return temp+i; + } +} + +static void adjust_mult_assign (int vars, Long exps, int temps) +{ + if (exps > 0) + { /* must correct function call */ + int diff = vars - basepc[exps]; + if (diff >= 0) + adjust_functioncall(exps, diff); + else + { + adjust_functioncall(exps, 0); + lua_codeadjust(temps); + } + } + else if (vars != -exps) + lua_codeadjust(temps); +} + +static int close_parlist (int dots) +{ + if (!dots) + lua_codeadjust(0); + else + { + code_byte(VARARGS); + code_byte(nlocalvar); + add_localvar(luaI_createfixedstring("arg")); + } + return lua_linenumber; +} + +static void storesinglevar (Long v) +{ + if (v > 0) /* global var */ + { + code_byte(STOREGLOBAL); + code_word(v-1); + } + else if (v < 0) /* local var */ + { + int number = (-v) - 1; + if (number < 10) code_byte(STORELOCAL0 + number); + else + { + code_byte(STORELOCAL); + code_byte(number); + } + } + else + code_byte(STOREINDEXED0); +} + +static void lua_codestore (int i) +{ + if (varbuffer[i] != 0) /* global or local var */ + storesinglevar(varbuffer[i]); + else /* indexed var */ + { + int j; + int upper=0; /* number of indexed variables upper */ + int param; /* number of itens until indexed expression */ + for (j=i+1; j code); + *initcode = newvector(CODE_BLOCK, Byte); + maincode = 0; + maxmain = CODE_BLOCK; + change2main(); + if (yyparse ()) lua_error("parse error"); + savemain(); + (*initcode)[maincode++] = RETCODE0; + tf->size = maincode; +#if LISTING +{ static void PrintCode (Byte *c, Byte *end); + PrintCode(*initcode,*initcode+maincode); } +#endif +} + + +%} + + +%union +{ + int vInt; + float vFloat; + char *pChar; + Word vWord; + Long vLong; + TFunc *pFunc; + TaggedString *pTStr; +} + +%start chunk + +%token WRONGTOKEN +%token NIL +%token IF THEN ELSE ELSEIF WHILE DO REPEAT UNTIL END +%token RETURN +%token LOCAL +%token FUNCTION +%token DOTS +%token NUMBER +%token STRING +%token NAME + +%type PrepJump +%type exprlist, exprlist1 /* if > 0, points to function return + counter (which has list length); if <= 0, -list lenght */ +%type functioncall, expr /* if != 0, points to function return + counter */ +%type varlist1, funcParams, funcvalue +%type fieldlist, localdeclist, decinit +%type ffieldlist, ffieldlist1, semicolonpart +%type lfieldlist, lfieldlist1 +%type parlist, parlist1, par +%type var, singlevar, funcname +%type body + +%left AND OR +%left EQ NE '>' '<' LE GE +%left CONC +%left '+' '-' +%left '*' '/' +%left UNARY NOT +%right '^' + + +%% /* beginning of rules section */ + +chunk : chunklist ret + +chunklist : /* empty */ + | chunklist stat sc + | chunklist function + ; + +function : FUNCTION funcname body + { + code_byte(PUSHFUNCTION); + code_code($3); + storesinglevar($2); + } + ; + +funcname : var { $$ =$1; init_func(); } + | varexp ':' NAME + { + code_byte(PUSHSTRING); + code_word(luaI_findconstant($3)); + $$ = 0; /* indexed variable */ + init_func(); + add_localvar(luaI_createfixedstring("self")); + } + ; + +body : '(' parlist ')' block END + { + codereturn(); + $$ = new(TFunc); + luaI_initTFunc($$); + $$->size = pc; + $$->code = newvector(pc, Byte); + $$->fileName = lua_parsedfile; + $$->lineDefined = $2; + memcpy($$->code, basepc, pc*sizeof(Byte)); + if (lua_debug) + luaI_closelocalvars($$); + /* save func values */ + funcCode = basepc; maxcode=maxcurr; +#if LISTING + PrintCode(funcCode,funcCode+pc); +#endif + change2main(); /* change back to main code */ + } + ; + +statlist : /* empty */ + | statlist stat sc + ; + +sc : /* empty */ | ';' ; + +stat : IF expr1 THEN PrepJump block PrepJump elsepart END + { codeIf($4, $6); } + + | WHILE {$$=pc;} expr1 DO PrepJump block PrepJump END + { + basepc[$5] = IFFJMP; + code_word_at(basepc+$5+1, pc - ($5 + sizeof(Word)+1)); + basepc[$7] = UPJMP; + code_word_at(basepc+$7+1, pc - ($2)); + } + + | REPEAT {$$=pc;} block UNTIL expr1 PrepJump + { + basepc[$6] = IFFUPJMP; + code_word_at(basepc+$6+1, pc - ($2)); + } + + | varlist1 '=' exprlist1 + { + { + int i; + adjust_mult_assign(nvarbuffer, $3, $1 * 2 + nvarbuffer); + for (i=nvarbuffer-1; i>=0; i--) + lua_codestore (i); + if ($1 > 1 || ($1 == 1 && varbuffer[0] != 0)) + lua_codeadjust (0); + } + } + | functioncall + | LOCAL localdeclist decinit + { nlocalvar += $2; + adjust_mult_assign($2, $3, 0); + } + ; + +elsepart : /* empty */ + | ELSE block + | ELSEIF expr1 THEN PrepJump block PrepJump elsepart + { codeIf($4, $6); } + ; + +block : {$$ = nlocalvar;} statlist ret + { + if (nlocalvar != $1) + { + if (lua_debug) + for (; nlocalvar > $1; nlocalvar--) + luaI_unregisterlocalvar(lua_linenumber); + else + nlocalvar = $1; + lua_codeadjust (0); + } + } + ; + +ret : /* empty */ + | RETURN exprlist sc + { + adjust_functioncall($2, MULT_RET); + codereturn(); + } + ; + +PrepJump : /* empty */ + { + $$ = pc; + code_byte(0); /* open space */ + code_word (0); + } + ; + +expr1 : expr { adjust_functioncall($1, 1); } + ; + +expr : '(' expr ')' { $$ = $2; } + | expr1 EQ expr1 { code_byte(EQOP); $$ = 0; } + | expr1 '<' expr1 { code_byte(LTOP); $$ = 0; } + | expr1 '>' expr1 { code_byte(GTOP); $$ = 0; } + | expr1 NE expr1 { code_byte(EQOP); code_byte(NOTOP); $$ = 0; } + | expr1 LE expr1 { code_byte(LEOP); $$ = 0; } + | expr1 GE expr1 { code_byte(GEOP); $$ = 0; } + | expr1 '+' expr1 { code_byte(ADDOP); $$ = 0; } + | expr1 '-' expr1 { code_byte(SUBOP); $$ = 0; } + | expr1 '*' expr1 { code_byte(MULTOP); $$ = 0; } + | expr1 '/' expr1 { code_byte(DIVOP); $$ = 0; } + | expr1 '^' expr1 { code_byte(POWOP); $$ = 0; } + | expr1 CONC expr1 { code_byte(CONCOP); $$ = 0; } + | '-' expr1 %prec UNARY { code_byte(MINUSOP); $$ = 0;} + | table { $$ = 0; } + | varexp { $$ = 0;} + | NUMBER { code_number($1); $$ = 0; } + | STRING + { + code_byte(PUSHSTRING); + code_word($1); + $$ = 0; + } + | NIL {code_byte(PUSHNIL); $$ = 0; } + | functioncall { $$ = $1; } + | NOT expr1 { code_byte(NOTOP); $$ = 0;} + | expr1 AND PrepJump {code_byte(POP); } expr1 + { + basepc[$3] = ONFJMP; + code_word_at(basepc+$3+1, pc - ($3 + sizeof(Word)+1)); + $$ = 0; + } + | expr1 OR PrepJump {code_byte(POP); } expr1 + { + basepc[$3] = ONTJMP; + code_word_at(basepc+$3+1, pc - ($3 + sizeof(Word)+1)); + $$ = 0; + } + ; + +table : + { + code_byte(CREATEARRAY); + $$ = pc; code_word(0); + } + '{' fieldlist '}' + { + code_word_at(basepc+$1, $3); + } + ; + +functioncall : funcvalue funcParams + { + code_byte(CALLFUNC); + code_byte($1+$2); + $$ = pc; + code_byte(0); /* may be modified by other rules */ + } + ; + +funcvalue : varexp { $$ = 0; } + | varexp ':' NAME + { + code_byte(PUSHSELF); + code_word(luaI_findconstant($3)); + $$ = 1; + } + ; + +funcParams : '(' exprlist ')' + { $$ = adjust_functioncall($2, 1); } + | table { $$ = 1; } + ; + +exprlist : /* empty */ { $$ = 0; } + | exprlist1 { $$ = $1; } + ; + +exprlist1 : expr { if ($1 != 0) $$ = $1; else $$ = -1; } + | exprlist1 ',' { $$ = adjust_functioncall($1, 1); } expr + { + if ($4 == 0) $$ = -($3 + 1); /* -length */ + else + { + adjust_functioncall($4, $3); + $$ = $4; + } + } + ; + +parlist : /* empty */ { $$ = close_parlist(0); } + | parlist1 { $$ = close_parlist($1); } + ; + +parlist1 : par { $$ = $1; } + | parlist1 ',' par + { + if ($1) + lua_error("invalid parameter list"); + $$ = $3; + } + ; + +par : NAME { add_localvar($1); $$ = 0; } + | DOTS { $$ = 1; } + ; + +fieldlist : lfieldlist + { flush_list($1/FIELDS_PER_FLUSH, $1%FIELDS_PER_FLUSH); } + semicolonpart + { $$ = $1+$3; } + | ffieldlist1 lastcomma + { $$ = $1; flush_record($1%FIELDS_PER_FLUSH); } + ; + +semicolonpart : /* empty */ + { $$ = 0; } + | ';' ffieldlist + { $$ = $2; flush_record($2%FIELDS_PER_FLUSH); } + ; + +lastcomma : /* empty */ + | ',' + ; + +ffieldlist : /* empty */ { $$ = 0; } + | ffieldlist1 lastcomma { $$ = $1; } + ; + +ffieldlist1 : ffield {$$=1;} + | ffieldlist1 ',' ffield + { + $$=$1+1; + if ($$%FIELDS_PER_FLUSH == 0) flush_record(FIELDS_PER_FLUSH); + } + ; + +ffield : NAME '=' expr1 + { + push_field(luaI_findconstant($1)); + } + ; + +lfieldlist : /* empty */ { $$ = 0; } + | lfieldlist1 lastcomma { $$ = $1; } + ; + +lfieldlist1 : expr1 {$$=1;} + | lfieldlist1 ',' expr1 + { + $$=$1+1; + if ($$%FIELDS_PER_FLUSH == 0) + flush_list($$/FIELDS_PER_FLUSH - 1, FIELDS_PER_FLUSH); + } + ; + +varlist1 : var + { + nvarbuffer = 0; + add_varbuffer($1); + $$ = ($1 == 0) ? 1 : 0; + } + | varlist1 ',' var + { + add_varbuffer($3); + $$ = ($3 == 0) ? $1 + 1 : $1; + } + ; + +var : singlevar { $$ = $1; } + | varexp '[' expr1 ']' + { + $$ = 0; /* indexed variable */ + } + | varexp '.' NAME + { + code_byte(PUSHSTRING); + code_word(luaI_findconstant($3)); + $$ = 0; /* indexed variable */ + } + ; + +singlevar : NAME + { + int local = lua_localname($1); + if (local == -1) /* global var */ + $$ = luaI_findsymbol($1)+1; /* return positive value */ + else + $$ = -(local+1); /* return negative value */ + } + ; + +varexp : var { lua_pushvar($1); } + ; + +localdeclist : NAME {store_localvar($1, 0); $$ = 1;} + | localdeclist ',' NAME + { + store_localvar($3, $1); + $$ = $1+1; + } + ; + +decinit : /* empty */ { $$ = 0; } + | '=' exprlist1 { $$ = $2; } + ; + +%% diff --git a/lib/lua/src/luac/Makefile b/lib/lua/src/luac/Makefile new file mode 100644 index 0000000..813393e --- /dev/null +++ b/lib/lua/src/luac/Makefile @@ -0,0 +1,24 @@ +# makefile for lua distribution (compiler) + +LUA= ../.. + +include $(LUA)/config + +INCS= -I$(INC) $(EXTRA_INCS) -I.. +OBJS= dump.o luac.o print.o +SRCS= dump.c luac.c print.c luac.h print.h +T=$(BIN)/luac + +all: $T + +$T: $(OBJS) + $(CC) -o $@ $(OBJS) -L$(LIB) -llua + +clean: + rm -f $(OBJS) $T + +co: + co -f -M $(SRCS) + +klean: clean + rm -f $(SRCS) diff --git a/lib/lua/src/luac/dump.c b/lib/lua/src/luac/dump.c new file mode 100644 index 0000000..656cc29 --- /dev/null +++ b/lib/lua/src/luac/dump.c @@ -0,0 +1,248 @@ +/* +** dump.c +** thread and save bytecodes to file +*/ + +char* rcs_dump="$Id: dump.c,v 1.17 1996/11/18 11:18:29 lhf Exp $"; + +#include +#include +#include +#include "luac.h" + +static TFunc* lastF=NULL; /* list of functions seen in code */ + +static int SawVar(int i, int at) +{ + int old=VarLoc(i); + VarLoc(i)=at; + return old; +} + +static int SawStr(int i, int at) +{ + int old=StrLoc(i); + StrLoc(i)=at; + return old; +} + +static void ThreadCode(Byte* code, Byte* end) +{ + Byte* p; + int i; + for (i=0; imarked=at; + tf->next=NULL; /* TODO: remove? */ + lastF=lastF->next=tf; + break; + } + case PUSHGLOBAL: + case STOREGLOBAL: + { + Word w; + p++; + get_word(w,p); + w=SawVar(w,at); + memcpy(p-2,&w,sizeof(w)); + break; + } + case STORERECORD: + { + int n=*++p; + p++; + while (n--) + { + Word w; + at=p-code; + get_word(w,p); + w=SawStr(w,at); + memcpy(p-2,&w,sizeof(w)); + } + break; + } + default: + fprintf(stderr,"luac: cannot happen: opcode=%d",*p); + exit(1); + break; + } + } +} + +static void DumpWord(int i, FILE* D) +{ + Word w=i; + fwrite(&w,sizeof(w),1,D); +} + +static void DumpBlock(void* b, int size, FILE* D) +{ + fwrite(b,size,1,D); +} + +static void DumpSize(int i, FILE* D) +{ + Word lo=i&0x0FFFF; + Word hi=(i>>16)&0x0FFFF; + fwrite(&hi,sizeof(hi),1,D); + fwrite(&lo,sizeof(lo),1,D); + if (hi!=0) + fprintf(stderr, + "luac: warning: code too long for 16-bit machines (%d bytes)\n",i); +} + +static void DumpString(char* s, FILE* D) +{ + int n=strlen(s)+1; + if ((Word)n != n) + { + fprintf(stderr,"luac: string too long: \"%.32s...\"\n",s); + exit(1); + } + DumpWord(n,D); + DumpBlock(s,n,D); +} + +static void DumpStrings(FILE* D) +{ + int i; + for (i=0; icode,tf->code+tf->size); + fputc(ID_FUN,D); + DumpSize(tf->size,D); + DumpWord(tf->lineDefined,D); + if (IsMain(tf)) + DumpString(tf->fileName,D); + else + DumpWord(tf->marked,D); + DumpBlock(tf->code,tf->size,D); + DumpStrings(D); +} + +void DumpHeader(FILE* D) +{ + Word w=TEST_WORD; + float f=TEST_FLOAT; + fputc(ID_CHUNK,D); + fputs(SIGNATURE,D); + fputc(VERSION,D); + fputc(sizeof(Word),D); + fputc(sizeof(float),D); + fputc(sizeof(TFunc*),D); + fwrite(&w,sizeof(w),1,D); + fwrite(&f,sizeof(f),1,D); +} diff --git a/lib/lua/src/luac/luac.c b/lib/lua/src/luac/luac.c new file mode 100644 index 0000000..7546c1b --- /dev/null +++ b/lib/lua/src/luac/luac.c @@ -0,0 +1,105 @@ +/* +** luac.c +** lua compiler (saves bytecodes to files) +*/ + +char* rcs_luac="$Id: luac.c,v 1.18 1996/11/16 20:14:23 lhf Exp $"; + +#include +#include +#include +#include "luac.h" + +static void compile(char* filename); + +static int listing=0; /* list bytecodes? */ +static int dumping=1; /* dump bytecodes? */ +static FILE* D; /* output file */ + +static void usage(void) +{ + fprintf(stderr,"usage: luac [-dlpv] [-o output] file ...\n"); + exit(0); +} + +#define IS(s) (strcmp(argv[i],s)==0) + +int main(int argc, char* argv[]) +{ + char* d="luac.out"; /* default output file */ + int i; + for (i=1; inext; /* list only built after first main */ + luaI_freefunc(tf); + tf=nf; + } +} + +static void do_compile(void) +{ + TFunc* tf=new(TFunc); + luaI_initTFunc(tf); + tf->fileName = lua_parsedfile; + lua_parse(tf); + do_dump(tf); +} + +static void compile(char* filename) +{ + if (lua_openfile(filename)==NULL) + { + fprintf(stderr,"luac: cannot open "); + perror(filename); + exit(1); + } + do_compile(); + lua_closefile(); +} diff --git a/lib/lua/src/luac/luac.h b/lib/lua/src/luac/luac.h new file mode 100644 index 0000000..ceb311b --- /dev/null +++ b/lib/lua/src/luac/luac.h @@ -0,0 +1,24 @@ +/* +** luac.h +** definitions for luac compiler +** $Id: luac.h,v 1.5 1996/03/08 21:41:47 lhf Exp $ +*/ + +#include "inout.h" +#include "mem.h" +#include "opcode.h" +#include "table.h" +#include "undump.h" + +#define VarStr(i) (lua_table[i].varname->str) +#define VarLoc(i) (lua_table[i].varname->varindex) +#define StrStr(i) (lua_constant[i]->str) +#define StrLoc(i) (lua_constant[i]->constindex) + +extern Word lua_ntable; +extern Word lua_nconstant; +extern int lua_debug; + +void DumpHeader(FILE* D); +void DumpFunction(TFunc* tf, FILE* D); +void PrintFunction(TFunc* tf); diff --git a/lib/lua/src/luac/print.c b/lib/lua/src/luac/print.c new file mode 100644 index 0000000..0e1d256 --- /dev/null +++ b/lib/lua/src/luac/print.c @@ -0,0 +1,190 @@ +/* +** print.c +** print bytecodes +*/ + +char* rcs_print="$Id: print.c,v 1.11 1996/11/18 11:24:16 lhf Exp $"; + +#include +#include +#include +#include "luac.h" +#include "print.h" + +static LocVar* V=NULL; + +static char* LocStr(int i) +{ + if (V==NULL) return ""; else return V[i].varname->str; +} + +static void PrintCode(Byte* code, Byte* end) +{ + Byte* p; + for (p=code; p!=end;) + { + OpCode op=(OpCode)*p; + if (op>SETLINE) op=SETLINE+1; + printf("%6d\t%s",(int)(p-code),OpCodeName[op]); + switch (op) + { + case PUSHNIL: + case PUSH0: + case PUSH1: + case PUSH2: + case PUSHINDEXED: + case STOREINDEXED0: + case ADJUST0: + case EQOP: + case LTOP: + case LEOP: + case GTOP: + case GEOP: + case ADDOP: + case SUBOP: + case MULTOP: + case DIVOP: + case POWOP: + case CONCOP: + case MINUSOP: + case NOTOP: + case POP: + case RETCODE0: + p++; + break; + case PUSHLOCAL0: + case PUSHLOCAL1: + case PUSHLOCAL2: + case PUSHLOCAL3: + case PUSHLOCAL4: + case PUSHLOCAL5: + case PUSHLOCAL6: + case PUSHLOCAL7: + case PUSHLOCAL8: + case PUSHLOCAL9: + { + int i=op-PUSHLOCAL0; + printf("\t%d\t; %s",i,LocStr(i)); + p++; + break; + } + case STORELOCAL0: + case STORELOCAL1: + case STORELOCAL2: + case STORELOCAL3: + case STORELOCAL4: + case STORELOCAL5: + case STORELOCAL6: + case STORELOCAL7: + case STORELOCAL8: + case STORELOCAL9: + { + int i=op-STORELOCAL0; + printf("\t%d\t; %s",i,LocStr(i)); + p++; + break; + } + case PUSHLOCAL: + case STORELOCAL: + { + int i=*(p+1); + printf("\t%d\t; %s",i,LocStr(i)); + p+=2; + break; + } + case PUSHBYTE: + case STOREINDEXED: + case STORELIST0: + case ADJUST: + case RETCODE: + printf("\t%d",*(p+1)); + p+=2; + break; + case PUSHWORD: + case CREATEARRAY: + case ONTJMP: + case ONFJMP: + case JMP: + case UPJMP: + case IFFJMP: + case IFFUPJMP: + case SETLINE: + { + Word w; + p++; + get_word(w,p); + printf("\t%d",w); + break; + } + case PUSHFLOAT: + { + float f; + p++; + get_float(f,p); + printf("\t%g",f); + break; + } + case PUSHSELF: + case PUSHSTRING: + { + Word w; + p++; + get_word(w,p); + printf("\t%d\t; \"%s\"",w,StrStr(w)); + break; + } + case PUSHFUNCTION: + { + TFunc* tf; + p++; + get_code(tf,p); + printf("\t%p\t; \"%s\":%d",tf,tf->fileName,tf->lineDefined); + break; + } + case PUSHGLOBAL: + case STOREGLOBAL: + { + Word w; + p++; + get_word(w,p); + printf("\t%d\t; %s",w,VarStr(w)); + break; + } + case STORELIST: + case CALLFUNC: + printf("\t%d %d",*(p+1),*(p+2)); + p+=3; + break; + case STORERECORD: + { + int n=*++p; + printf("\t%d",n); + p++; + while (n--) + { + Word w; + printf("\n%6d\t FIELD",(int)(p-code)); + get_word(w,p); + printf("\t%d\t; \"%s\"",w,StrStr(w)); + } + break; + } + default: + printf("\tcannot happen: opcode=%d",*p); + exit(1); + break; + } + printf("\n"); + } +} + +void PrintFunction(TFunc* tf) +{ + if (IsMain(tf)) + printf("\nmain of \"%s\" (%d bytes at %p)\n",tf->fileName,tf->size,tf); + else + printf("\nfunction \"%s\":%d (%d bytes at %p); used at main+%d\n", + tf->fileName,tf->lineDefined,tf->size,tf,tf->marked); + V=tf->locvars; + PrintCode(tf->code,tf->code+tf->size); +} diff --git a/lib/lua/src/luac/print.h b/lib/lua/src/luac/print.h new file mode 100644 index 0000000..31e2bb8 --- /dev/null +++ b/lib/lua/src/luac/print.h @@ -0,0 +1,76 @@ +/* +** print.h +** opcode names +** $Id: print.h,v 1.1 1996/02/23 19:04:13 lhf Exp $ +*/ + +static char* OpCodeName[]={ /* attention: same order as enum in opcode.h */ + "PUSHNIL", + "PUSH0", + "PUSH1", + "PUSH2", + "PUSHBYTE", + "PUSHWORD", + "PUSHFLOAT", + "PUSHSTRING", + "PUSHFUNCTION", + "PUSHLOCAL0", + "PUSHLOCAL1", + "PUSHLOCAL2", + "PUSHLOCAL3", + "PUSHLOCAL4", + "PUSHLOCAL5", + "PUSHLOCAL6", + "PUSHLOCAL7", + "PUSHLOCAL8", + "PUSHLOCAL9", + "PUSHLOCAL", + "PUSHGLOBAL", + "PUSHINDEXED", + "PUSHSELF", + "STORELOCAL0", + "STORELOCAL1", + "STORELOCAL2", + "STORELOCAL3", + "STORELOCAL4", + "STORELOCAL5", + "STORELOCAL6", + "STORELOCAL7", + "STORELOCAL8", + "STORELOCAL9", + "STORELOCAL", + "STOREGLOBAL", + "STOREINDEXED0", + "STOREINDEXED", + "STORELIST0", + "STORELIST", + "STORERECORD", + "ADJUST0", + "ADJUST", + "CREATEARRAY", + "EQOP", + "LTOP", + "LEOP", + "GTOP", + "GEOP", + "ADDOP", + "SUBOP", + "MULTOP", + "DIVOP", + "POWOP", + "CONCOP", + "MINUSOP", + "NOTOP", + "ONTJMP", + "ONFJMP", + "JMP", + "UPJMP", + "IFFJMP", + "IFFUPJMP", + "POP", + "CALLFUNC", + "RETCODE0", + "RETCODE", + "SETLINE", + "" +}; diff --git a/lib/lua/src/mem.c b/lib/lua/src/mem.c new file mode 100644 index 0000000..4e3bcc5 --- /dev/null +++ b/lib/lua/src/mem.c @@ -0,0 +1,58 @@ +/* +** mem.c +** TecCGraf - PUC-Rio +*/ + +char *rcs_mem = "$Id: mem.c,v 1.13 1996/05/24 14:31:10 roberto Exp $"; + +#include + +#include "mem.h" +#include "lua.h" + + +void luaI_free (void *block) +{ + if (block) + { + *((int *)block) = -1; /* to catch errors */ + free(block); + } +} + + +void *luaI_realloc (void *oldblock, unsigned long size) +{ + void *block; + size_t s = (size_t)size; + if (s != size) + lua_error("Allocation Error: Block too big"); + block = oldblock ? realloc(oldblock, s) : malloc(s); + if (block == NULL) + lua_error(memEM); + return block; +} + + +int luaI_growvector (void **block, unsigned long nelems, int size, + char *errormsg, unsigned long limit) +{ + if (nelems >= limit) + lua_error(errormsg); + nelems = (nelems == 0) ? 20 : nelems*2; + if (nelems > limit) + nelems = limit; + *block = luaI_realloc(*block, nelems*size); + return (int)nelems; +} + + +void* luaI_buffer (unsigned long size) +{ + static unsigned long buffsize = 0; + static char* buffer = NULL; + if (size > buffsize) + buffer = luaI_realloc(buffer, buffsize=size); + return buffer; +} + diff --git a/lib/lua/src/mem.h b/lib/lua/src/mem.h new file mode 100644 index 0000000..86f024f --- /dev/null +++ b/lib/lua/src/mem.h @@ -0,0 +1,39 @@ +/* +** mem.c +** memory manager for lua +** $Id: mem.h,v 1.8 1996/05/24 14:31:10 roberto Exp $ +*/ + +#ifndef mem_h +#define mem_h + +#ifndef NULL +#define NULL 0 +#endif + + +/* memory error messages */ +#define codeEM "code size overflow" +#define symbolEM "symbol table overflow" +#define constantEM "constant table overflow" +#define stackEM "stack size overflow" +#define lexEM "lex buffer overflow" +#define refEM "reference table overflow" +#define tableEM "table overflow" +#define memEM "not enough memory" + + +void luaI_free (void *block); +void *luaI_realloc (void *oldblock, unsigned long size); +void *luaI_buffer (unsigned long size); +int luaI_growvector (void **block, unsigned long nelems, int size, + char *errormsg, unsigned long limit); + +#define luaI_malloc(s) luaI_realloc(NULL, (s)) +#define new(s) ((s *)luaI_malloc(sizeof(s))) +#define newvector(n,s) ((s *)luaI_malloc((n)*sizeof(s))) +#define growvector(old,n,s,e,l) \ + (luaI_growvector((void**)old,n,sizeof(s),e,l)) + +#endif + diff --git a/lib/lua/src/opcode.c b/lib/lua/src/opcode.c new file mode 100644 index 0000000..c3bcf54 --- /dev/null +++ b/lib/lua/src/opcode.c @@ -0,0 +1,1330 @@ +/* +** opcode.c +** TecCGraf - PUC-Rio +*/ + +char *rcs_opcode="$Id: opcode.c,v 3.77 1996/11/18 13:48:44 roberto Exp $"; + +#include +#include +#include +#include + +#include "luadebug.h" +#include "mem.h" +#include "opcode.h" +#include "hash.h" +#include "inout.h" +#include "table.h" +#include "lua.h" +#include "fallback.h" +#include "undump.h" + +#define tonumber(o) ((tag(o) != LUA_T_NUMBER) && (lua_tonumber(o) != 0)) +#define tostring(o) ((tag(o) != LUA_T_STRING) && (lua_tostring(o) != 0)) + + +#define STACK_SIZE 128 + +#ifndef STACK_LIMIT +#define STACK_LIMIT 6000 +#endif + +typedef int StkId; /* index to stack elements */ + +static Object initial_stack; + +static Object *stackLimit = &initial_stack+1; +static Object *stack = &initial_stack; +static Object *top = &initial_stack; + + +/* macros to convert from lua_Object to (Object *) and back */ + +#define Address(lo) ((lo)+stack-1) +#define Ref(st) ((st)-stack+1) + + +/* macro to increment stack top. There must be always an empty slot in +* the stack +*/ +#define incr_top if (++top >= stackLimit) growstack() + +struct C_Lua_Stack { + StkId base; /* when Lua calls C or C calls Lua, points to */ + /* the first slot after the last parameter. */ + int num; /* when Lua calls C, has the number of parameters; */ + /* when C calls Lua, has the number of results. */ +}; + +static struct C_Lua_Stack CLS_current = {0, 0}; + +static jmp_buf *errorJmp = NULL; /* current error recover point */ + + +/* Hooks */ +lua_LHFunction lua_linehook = NULL; +lua_CHFunction lua_callhook = NULL; + + +static StkId lua_execute (Byte *pc, StkId base); +static void do_call (StkId base, int nResults); + + + +Object *luaI_Address (lua_Object o) +{ + return Address(o); +} + + +/* +** Init stack +*/ +static void lua_initstack (void) +{ + Long maxstack = STACK_SIZE; + stack = newvector(maxstack, Object); + stackLimit = stack+maxstack; + top = stack; + *(top++) = initial_stack; +} + + +/* +** Check stack overflow and, if necessary, realloc vector +*/ +#define lua_checkstack(nt) if ((nt) >= stackLimit) growstack() + +static void growstack (void) +{ + if (stack == &initial_stack) + lua_initstack(); + else + { + static int limit = STACK_LIMIT; + StkId t = top-stack; + Long stacksize = stackLimit - stack; + stacksize = growvector(&stack, stacksize, Object, stackEM, limit+100); + stackLimit = stack+stacksize; + top = stack + t; + if (stacksize >= limit) + { + limit = stacksize; + lua_error(stackEM); + } + } +} + + +/* +** Concatenate two given strings. Return the new string pointer. +*/ +static char *lua_strconc (char *l, char *r) +{ + size_t nl = strlen(l); + char *buffer = luaI_buffer(nl+strlen(r)+1); + strcpy(buffer, l); + strcpy(buffer+nl, r); + return buffer; +} + + +/* +** Convert, if possible, to a number object. +** Return 0 if success, not 0 if error. +*/ +static int lua_tonumber (Object *obj) +{ + float t; + char c; + if (tag(obj) != LUA_T_STRING) + return 1; + else if (sscanf(svalue(obj), "%f %c",&t, &c) == 1) + { + nvalue(obj) = t; + tag(obj) = LUA_T_NUMBER; + return 0; + } + else + return 2; +} + + +/* +** Convert, if possible, to a string tag +** Return 0 in success or not 0 on error. +*/ +static int lua_tostring (Object *obj) +{ + char s[256]; + if (tag(obj) != LUA_T_NUMBER) + return 1; + if ((int) nvalue(obj) == nvalue(obj)) + sprintf (s, "%d", (int) nvalue(obj)); + else + sprintf (s, "%g", nvalue(obj)); + tsvalue(obj) = lua_createstring(s); + tag(obj) = LUA_T_STRING; + return 0; +} + + +/* +** Adjust stack. Set top to the given value, pushing NILs if needed. +*/ +static void adjust_top (StkId newtop) +{ + Object *nt; + lua_checkstack(stack+newtop); + nt = stack+newtop; /* warning: previous call may change stack */ + while (top < nt) tag(top++) = LUA_T_NIL; + top = nt; /* top could be bigger than newtop */ +} + +#define adjustC(nParams) adjust_top(CLS_current.base+nParams) + + +/* +** Open a hole below "nelems" from the top. +*/ +static void open_stack (int nelems) +{ + int i; + for (i=0; ivalue.tf->fileName, f->value.tf->lineDefined); + else + (*lua_callhook)(Ref(f), "(C)", -1); + } + top = stack+old_top; + CLS_current = oldCLS; +} + + +/* +** Call a C function. CLS_current.base will point to the top of the stack, +** and CLS_current.num is the number of parameters. Returns an index +** to the first result from C. +*/ +static StkId callC (lua_CFunction func, StkId base) +{ + struct C_Lua_Stack oldCLS = CLS_current; + StkId firstResult; + CLS_current.num = (top-stack) - base; + /* incorporate parameters on the stack */ + CLS_current.base = base+CLS_current.num; /* == top-stack */ + if (lua_callhook) + callHook(base, LUA_T_CMARK, 0); + (*func)(); + if (lua_callhook) /* func may have changed lua_callhook */ + callHook(base, LUA_T_CMARK, 1); + firstResult = CLS_current.base; + CLS_current = oldCLS; + return firstResult; +} + +/* +** Call the specified fallback, putting it on the stack below its arguments +*/ +static void callFB (int fb) +{ + int nParams = luaI_fallBacks[fb].nParams; + open_stack(nParams); + *(top-nParams-1) = luaI_fallBacks[fb].function; + do_call((top-stack)-nParams, luaI_fallBacks[fb].nResults); +} + + +/* +** Call a function (C or Lua). The parameters must be on the stack, +** between [stack+base,top). The function to be called is at stack+base-1. +** When returns, the results are on the stack, between [stack+base-1,top). +** The number of results is nResults, unless nResults=MULT_RET. +*/ +static void do_call (StkId base, int nResults) +{ + StkId firstResult; + Object *func = stack+base-1; + int i; + if (tag(func) == LUA_T_CFUNCTION) + { + tag(func) = LUA_T_CMARK; + firstResult = callC(fvalue(func), base); + } + else if (tag(func) == LUA_T_FUNCTION) + { + tag(func) = LUA_T_MARK; + firstResult = lua_execute(func->value.tf->code, base); + } + else + { /* func is not a function */ + /* Call the fallback for invalid functions */ + open_stack((top-stack)-(base-1)); + stack[base-1] = luaI_fallBacks[FB_FUNCTION].function; + do_call(base, nResults); + return; + } + /* adjust the number of results */ + if (nResults != MULT_RET && top - (stack+firstResult) != nResults) + adjust_top(firstResult+nResults); + /* move results to base-1 (to erase parameters and function) */ + base--; + nResults = top - (stack+firstResult); /* actual number of results */ + for (i=0; i= stack; o--) + fn (o); +} + + +/* +** Error messages and debug functions +*/ + +static void lua_message (char *s) +{ + lua_pushstring(s); + callFB(FB_ERROR); +} + +/* +** Reports an error, and jumps up to the available recover label +*/ +void lua_error (char *s) +{ + if (s) lua_message(s); + if (errorJmp) + longjmp(*errorJmp, 1); + else + { + fprintf (stderr, "lua: exit(1). Unable to recover\n"); + exit(1); + } +} + + +lua_Function lua_stackedfunction (int level) +{ + Object *p = top; + while (--p >= stack) + if (p->tag == LUA_T_MARK || p->tag == LUA_T_CMARK) + if (level-- == 0) + return Ref(p); + return LUA_NOOBJECT; +} + + +int lua_currentline (lua_Function func) +{ + Object *f = Address(func); + return (f+1 < top && (f+1)->tag == LUA_T_LINE) ? (f+1)->value.i : -1; +} + + +lua_Object lua_getlocal (lua_Function func, int local_number, char **name) +{ + Object *f = luaI_Address(func); + *name = luaI_getlocalname(f->value.tf, local_number, lua_currentline(func)); + if (*name) + { + /* if "*name", there must be a LUA_T_LINE */ + /* therefore, f+2 points to function base */ + return Ref((f+2)+(local_number-1)); + } + else + return LUA_NOOBJECT; +} + +int lua_setlocal (lua_Function func, int local_number) +{ + Object *f = Address(func); + char *name = luaI_getlocalname(f->value.tf, local_number, lua_currentline(func)); + adjustC(1); + --top; + if (name) + { + /* if "name", there must be a LUA_T_LINE */ + /* therefore, f+2 points to function base */ + *((f+2)+(local_number-1)) = *top; + return 1; + } + else + return 0; +} + + +/* +** Execute a protected call. Assumes that function is at CLS_current.base and +** parameters are on top of it. Leave nResults on the stack. +*/ +static int do_protectedrun (int nResults) +{ + jmp_buf myErrorJmp; + int status; + struct C_Lua_Stack oldCLS = CLS_current; + jmp_buf *oldErr = errorJmp; + errorJmp = &myErrorJmp; + if (setjmp(myErrorJmp) == 0) + { + do_call(CLS_current.base+1, nResults); + CLS_current.num = (top-stack) - CLS_current.base; /* number of results */ + CLS_current.base += CLS_current.num; /* incorporate results on the stack */ + status = 0; + } + else + { /* an error occurred: restore CLS_current and top */ + CLS_current = oldCLS; + top = stack+CLS_current.base; + status = 1; + } + errorJmp = oldErr; + return status; +} + +int luaI_dorun (TFunc *tf) +{ + int status; + adjustC(1); /* one slot for the pseudo-function */ + stack[CLS_current.base].tag = LUA_T_FUNCTION; + stack[CLS_current.base].value.tf = tf; + status = do_protectedrun(MULT_RET); + return status; +} + +static int do_protectedmain (void) +{ + TFunc tf; + int status; + jmp_buf myErrorJmp; + jmp_buf *oldErr = errorJmp; + errorJmp = &myErrorJmp; + luaI_initTFunc(&tf); + tf.fileName = lua_parsedfile; + if (setjmp(myErrorJmp) == 0) + { + lua_parse(&tf); + status = luaI_dorun(&tf); + } + else + { + status = 1; + adjustC(0); /* erase extra slot */ + } + errorJmp = oldErr; + luaI_free(tf.code); + return status; +} + + +/* +** Execute the given lua function. Return 0 on success or 1 on error. +*/ +int lua_callfunction (lua_Object function) +{ + if (function == LUA_NOOBJECT) + return 1; + else + { + open_stack((top-stack)-CLS_current.base); + stack[CLS_current.base] = *Address(function); + return do_protectedrun (MULT_RET); + } +} + + +int lua_call (char *funcname) +{ + Word n = luaI_findsymbolbyname(funcname); + open_stack((top-stack)-CLS_current.base); + stack[CLS_current.base] = s_object(n); + return do_protectedrun(MULT_RET); +} + + +/* +** Open file, generate opcode and execute global statement. Return 0 on +** success or non 0 on error. +*/ +int lua_dofile (char *filename) +{ + int status; + int c; + FILE *f = lua_openfile(filename); + if (f == NULL) + return 2; + c = fgetc(f); + ungetc(c, f); + if (c == ID_CHUNK) { + f = freopen(filename, "rb", f); /* set binary mode */ + status = luaI_undump(f); + } + else { + if (c == '#') + while ((c=fgetc(f)) != '\n') /* skip first line */; + status = do_protectedmain(); + } + lua_closefile(); + return status; +} + +/* +** Generate opcode stored on string and execute global statement. Return 0 on +** success or non 0 on error. +*/ +int lua_dostring (char *str) +{ + int status; + if (str == NULL) + return 1; + lua_openstring(str); + status = do_protectedmain(); + lua_closestring(); + return status; +} + + +/* +** API: set a function as a fallback +*/ +lua_Object lua_setfallback (char *name, lua_CFunction fallback) +{ + adjustC(1); /* one slot for the pseudo-function */ + stack[CLS_current.base].tag = LUA_T_CFUNCTION; + stack[CLS_current.base].value.f = luaI_setfallback; + lua_pushstring(name); + lua_pushcfunction(fallback); + if (do_protectedrun(1) == 0) + return (Ref(top-1)); + else + return LUA_NOOBJECT; +} + + +/* +** API: receives on the stack the table and the index. +** returns the value. +*/ +lua_Object lua_getsubscript (void) +{ + adjustC(2); + pushsubscript(); + CLS_current.base++; /* incorporate object in the stack */ + return (Ref(top-1)); +} + + +#define MAX_C_BLOCKS 10 + +static int numCblocks = 0; +static struct C_Lua_Stack Cblocks[MAX_C_BLOCKS]; + +/* +** API: starts a new block +*/ +void lua_beginblock (void) +{ + if (numCblocks >= MAX_C_BLOCKS) + lua_error("`lua_beginblock': too many nested blocks"); + Cblocks[numCblocks] = CLS_current; + numCblocks++; +} + +/* +** API: ends a block +*/ +void lua_endblock (void) +{ + --numCblocks; + CLS_current = Cblocks[numCblocks]; + adjustC(0); +} + +/* +** API: receives on the stack the table, the index, and the new value. +*/ +void lua_storesubscript (void) +{ + adjustC(3); + storesubscript(); +} + +/* +** API: creates a new table +*/ +lua_Object lua_createtable (void) +{ + adjustC(0); + avalue(top) = lua_createarray(0); + tag(top) = LUA_T_ARRAY; + incr_top; + CLS_current.base++; /* incorporate object in the stack */ + return Ref(top-1); +} + +/* +** Get a parameter, returning the object handle or LUA_NOOBJECT on error. +** 'number' must be 1 to get the first parameter. +*/ +lua_Object lua_getparam (int number) +{ + if (number <= 0 || number > CLS_current.num) return LUA_NOOBJECT; + /* Ref(stack+(CLS_current.base-CLS_current.num+number-1)) == + stack+(CLS_current.base-CLS_current.num+number-1)-stack+1 == */ + return CLS_current.base-CLS_current.num+number; +} + +int lua_isnumber (lua_Object object) +{ + return (object != LUA_NOOBJECT) && (tonumber(Address(object)) == 0); +} + +int lua_isstring (lua_Object object) +{ + int t = lua_type(object); + return (t == LUA_T_STRING) || (t == LUA_T_NUMBER); +} + +int lua_isfunction (lua_Object object) +{ + int t = lua_type(object); + return (t == LUA_T_FUNCTION) || (t == LUA_T_CFUNCTION) || + (t == LUA_T_MARK) || (t == LUA_T_CMARK); +} + +/* +** Given an object handle, return its number value. On error, return 0.0. +*/ +real lua_getnumber (lua_Object object) +{ + if (object == LUA_NOOBJECT) return 0.0; + if (tonumber (Address(object))) return 0.0; + else return (nvalue(Address(object))); +} + +/* +** Given an object handle, return its string pointer. On error, return NULL. +*/ +char *lua_getstring (lua_Object object) +{ + if (object == LUA_NOOBJECT) return NULL; + if (tostring (Address(object))) return NULL; + else return (svalue(Address(object))); +} + +/* +** Given an object handle, return its cfuntion pointer. On error, return NULL. +*/ +lua_CFunction lua_getcfunction (lua_Object object) +{ + if (object == LUA_NOOBJECT || ((tag(Address(object)) != LUA_T_CFUNCTION) && + (tag(Address(object)) != LUA_T_CMARK))) + return NULL; + else return (fvalue(Address(object))); +} + +/* +** Given an object handle, return its user data. On error, return NULL. +*/ +void *lua_getuserdata (lua_Object object) +{ + if (object == LUA_NOOBJECT || tag(Address(object)) < LUA_T_USERDATA) + return NULL; + else return (uvalue(Address(object))); +} + + +lua_Object lua_getref (int ref) +{ + Object *o = luaI_getref(ref); + if (o == NULL) + return LUA_NOOBJECT; + adjustC(0); + luaI_pushobject(o); + CLS_current.base++; /* incorporate object in the stack */ + return Ref(top-1); +} + + +void lua_pushref (int ref) +{ + Object *o = luaI_getref(ref); + if (o == NULL) + lua_error("access to invalid (possibly garbage collected) reference"); + luaI_pushobject(o); +} + + +int lua_ref (int lock) +{ + adjustC(1); + return luaI_ref(--top, lock); +} + + + +/* +** Get a global object. +*/ +lua_Object lua_getglobal (char *name) +{ + adjustC(0); + getglobal(luaI_findsymbolbyname(name)); + CLS_current.base++; /* incorporate object in the stack */ + return Ref(top-1); +} + +/* +** Store top of the stack at a global variable array field. +*/ +void lua_storeglobal (char *name) +{ + Word n = luaI_findsymbolbyname(name); + adjustC(1); + s_object(n) = *(--top); +} + +/* +** Push a nil object +*/ +void lua_pushnil (void) +{ + tag(top) = LUA_T_NIL; + incr_top; +} + +/* +** Push an object (tag=number) to stack. +*/ +void lua_pushnumber (real n) +{ + tag(top) = LUA_T_NUMBER; nvalue(top) = n; + incr_top; +} + +/* +** Push an object (tag=string) to stack. +*/ +void lua_pushstring (char *s) +{ + if (s == NULL) + tag(top) = LUA_T_NIL; + else + { + tsvalue(top) = lua_createstring(s); + tag(top) = LUA_T_STRING; + } + incr_top; +} +/*>>>>>>>>>#undef lua_pushliteral +void lua_pushliteral(char *s) { lua_pushstring(s); }*/ + +/* +** Push an object (tag=cfunction) to stack. +*/ +void lua_pushcfunction (lua_CFunction fn) +{ + tag(top) = LUA_T_CFUNCTION; fvalue(top) = fn; + incr_top; +} + +/* +** Push an object (tag=userdata) to stack. +*/ +void lua_pushusertag (void *u, int tag) +{ + if (tag < LUA_T_USERDATA) + lua_error("invalid tag in `lua_pushusertag'"); + tag(top) = tag; uvalue(top) = u; + incr_top; +} + +/* +** Push an object on the stack. +*/ +void luaI_pushobject (Object *o) +{ + *top = *o; + incr_top; +} + +/* +** Push a lua_Object on stack. +*/ +void lua_pushobject (lua_Object o) +{ + if (o == LUA_NOOBJECT) + lua_error("attempt to push a NOOBJECT"); + *top = *Address(o); + if (tag(top) == LUA_T_MARK) tag(top) = LUA_T_FUNCTION; + else if (tag(top) == LUA_T_CMARK) tag(top) = LUA_T_CFUNCTION; + incr_top; +} + +int lua_type (lua_Object o) +{ + if (o == LUA_NOOBJECT) + return LUA_T_NIL; + else + return tag(Address(o)); +} + + +void luaI_gcFB (Object *o) +{ + *top = *o; + incr_top; + callFB(FB_GC); +} + + +static void call_arith (char *op) +{ + lua_pushstring(op); + callFB(FB_ARITH); +} + +static void comparison (lua_Type tag_less, lua_Type tag_equal, + lua_Type tag_great, char *op) +{ + Object *l = top-2; + Object *r = top-1; + int result; + if (tag(l) == LUA_T_NUMBER && tag(r) == LUA_T_NUMBER) + result = (nvalue(l) < nvalue(r)) ? -1 : (nvalue(l) == nvalue(r)) ? 0 : 1; + else if (tostring(l) || tostring(r)) + { + lua_pushstring(op); + callFB(FB_ORDER); + return; + } + else + result = strcmp(svalue(l), svalue(r)); + top--; + nvalue(top-1) = 1; + tag(top-1) = (result < 0) ? tag_less : (result == 0) ? tag_equal : tag_great; +} + + +static void adjust_varargs (StkId first_extra_arg) +{ + Object arg; + Object *firstelem = stack+first_extra_arg; + int nvararg = top-firstelem; + int i; + if (nvararg < 0) nvararg = 0; + avalue(&arg) = lua_createarray(nvararg+1); /* +1 for field 'n' */ + tag(&arg) = LUA_T_ARRAY; + for (i=0; itag = LUA_T_FUNCTION; + top->value.tf = f; + incr_top; + } + break; + + case PUSHLOCAL0: case PUSHLOCAL1: case PUSHLOCAL2: + case PUSHLOCAL3: case PUSHLOCAL4: case PUSHLOCAL5: + case PUSHLOCAL6: case PUSHLOCAL7: case PUSHLOCAL8: + case PUSHLOCAL9: + *top = *((stack+base) + (int)(opcode-PUSHLOCAL0)); incr_top; break; + + case PUSHLOCAL: *top = *((stack+base) + (*pc++)); incr_top; break; + + case PUSHGLOBAL: + { + Word w; + get_word(w,pc); + getglobal(w); + } + break; + + case PUSHINDEXED: + pushsubscript(); + break; + + case PUSHSELF: + { + Object receiver = *(top-1); + Word w; + get_word(w,pc); + tag(top) = LUA_T_STRING; tsvalue(top) = lua_constant[w]; + incr_top; + pushsubscript(); + *top = receiver; + incr_top; + break; + } + + case STORELOCAL0: case STORELOCAL1: case STORELOCAL2: + case STORELOCAL3: case STORELOCAL4: case STORELOCAL5: + case STORELOCAL6: case STORELOCAL7: case STORELOCAL8: + case STORELOCAL9: + *((stack+base) + (int)(opcode-STORELOCAL0)) = *(--top); + break; + + case STORELOCAL: *((stack+base) + (*pc++)) = *(--top); break; + + case STOREGLOBAL: + { + Word w; + get_word(w,pc); + s_object(w) = *(--top); + } + break; + + case STOREINDEXED0: + storesubscript(); + break; + + case STOREINDEXED: + { + int n = *pc++; + if (tag(top-3-n) != LUA_T_ARRAY) + { + lua_checkstack(top+2); + *(top+1) = *(top-1); + *(top) = *(top-2-n); + *(top-1) = *(top-3-n); + top += 2; + callFB(FB_SETTABLE); + } + else + { + Object *h = lua_hashdefine (avalue(top-3-n), top-2-n); + *h = *(top-1); + top--; + } + } + break; + + case STORELIST0: + case STORELIST: + { + int m, n; + Object *arr; + if (opcode == STORELIST0) m = 0; + else m = *(pc++) * FIELDS_PER_FLUSH; + n = *(pc++); + arr = top-n-1; + while (n) + { + tag(top) = LUA_T_NUMBER; nvalue(top) = n+m; + *(lua_hashdefine (avalue(arr), top)) = *(top-1); + top--; + n--; + } + } + break; + + case STORERECORD: + { + int n = *(pc++); + Object *arr = top-n-1; + while (n) + { + Word w; + get_word(w,pc); + tag(top) = LUA_T_STRING; tsvalue(top) = lua_constant[w]; + *(lua_hashdefine (avalue(arr), top)) = *(top-1); + top--; + n--; + } + } + break; + + case ADJUST0: + adjust_top(base); + break; + + case ADJUST: + adjust_top(base + *(pc++)); + break; + + case VARARGS: + adjust_varargs(base + *(pc++)); + break; + + case CREATEARRAY: + { + Word size; + get_word(size,pc); + avalue(top) = lua_createarray(size); + tag(top) = LUA_T_ARRAY; + incr_top; + } + break; + + case EQOP: + { + int res = lua_equalObj(top-2, top-1); + --top; + tag(top-1) = res ? LUA_T_NUMBER : LUA_T_NIL; + nvalue(top-1) = 1; + } + break; + + case LTOP: + comparison(LUA_T_NUMBER, LUA_T_NIL, LUA_T_NIL, "lt"); + break; + + case LEOP: + comparison(LUA_T_NUMBER, LUA_T_NUMBER, LUA_T_NIL, "le"); + break; + + case GTOP: + comparison(LUA_T_NIL, LUA_T_NIL, LUA_T_NUMBER, "gt"); + break; + + case GEOP: + comparison(LUA_T_NIL, LUA_T_NUMBER, LUA_T_NUMBER, "ge"); + break; + + case ADDOP: + { + Object *l = top-2; + Object *r = top-1; + if (tonumber(r) || tonumber(l)) + call_arith("add"); + else + { + nvalue(l) += nvalue(r); + --top; + } + } + break; + + case SUBOP: + { + Object *l = top-2; + Object *r = top-1; + if (tonumber(r) || tonumber(l)) + call_arith("sub"); + else + { + nvalue(l) -= nvalue(r); + --top; + } + } + break; + + case MULTOP: + { + Object *l = top-2; + Object *r = top-1; + if (tonumber(r) || tonumber(l)) + call_arith("mul"); + else + { + nvalue(l) *= nvalue(r); + --top; + } + } + break; + + case DIVOP: + { + Object *l = top-2; + Object *r = top-1; + if (tonumber(r) || tonumber(l)) + call_arith("div"); + else + { + nvalue(l) /= nvalue(r); + --top; + } + } + break; + + case POWOP: + call_arith("pow"); + break; + + case CONCOP: + { + Object *l = top-2; + Object *r = top-1; + if (tostring(r) || tostring(l)) + callFB(FB_CONCAT); + else + { + tsvalue(l) = lua_createstring (lua_strconc(svalue(l),svalue(r))); + --top; + } + } + break; + + case MINUSOP: + if (tonumber(top-1)) + { + tag(top) = LUA_T_NIL; + incr_top; + call_arith("unm"); + } + else + nvalue(top-1) = - nvalue(top-1); + break; + + case NOTOP: + tag(top-1) = (tag(top-1) == LUA_T_NIL) ? LUA_T_NUMBER : LUA_T_NIL; + nvalue(top-1) = 1; + break; + + case ONTJMP: + { + Word w; + get_word(w,pc); + if (tag(top-1) != LUA_T_NIL) pc += w; + } + break; + + case ONFJMP: + { + Word w; + get_word(w,pc); + if (tag(top-1) == LUA_T_NIL) pc += w; + } + break; + + case JMP: + { + Word w; + get_word(w,pc); + pc += w; + } + break; + + case UPJMP: + { + Word w; + get_word(w,pc); + pc -= w; + } + break; + + case IFFJMP: + { + Word w; + get_word(w,pc); + top--; + if (tag(top) == LUA_T_NIL) pc += w; + } + break; + + case IFFUPJMP: + { + Word w; + get_word(w,pc); + top--; + if (tag(top) == LUA_T_NIL) pc -= w; + } + break; + + case POP: --top; break; + + case CALLFUNC: + { + int nParams = *(pc++); + int nResults = *(pc++); + StkId newBase = (top-stack)-nParams; + do_call(newBase, nResults); + } + break; + + case RETCODE0: + case RETCODE: + if (lua_callhook) + callHook (base, LUA_T_MARK, 1); + return (base + ((opcode==RETCODE0) ? 0 : *pc)); + + case SETLINE: + { + Word line; + get_word(line,pc); + if ((stack+base-1)->tag != LUA_T_LINE) + { + /* open space for LINE value */ + open_stack((top-stack)-base); + base++; + (stack+base-1)->tag = LUA_T_LINE; + } + (stack+base-1)->value.i = line; + if (lua_linehook) + lineHook (line); + break; + } + + default: + lua_error ("internal error - opcode doesn't match"); + } + } +} + diff --git a/lib/lua/src/opcode.h b/lib/lua/src/opcode.h new file mode 100644 index 0000000..381efbc --- /dev/null +++ b/lib/lua/src/opcode.h @@ -0,0 +1,150 @@ +/* +** TeCGraf - PUC-Rio +** $Id: opcode.h,v 3.24 1996/11/01 12:46:59 roberto Exp $ +*/ + +#ifndef opcode_h +#define opcode_h + +#include "lua.h" +#include "types.h" +#include "tree.h" +#include "func.h" + + +#define FIELDS_PER_FLUSH 40 + + +typedef enum { +/* name parm before after side effect +-----------------------------------------------------------------------------*/ + +PUSHNIL,/* - nil */ +PUSH0,/* - 0.0 */ +PUSH1,/* - 1.0 */ +PUSH2,/* - 2.0 */ +PUSHBYTE,/* b - (float)b */ +PUSHWORD,/* w - (float)w */ +PUSHFLOAT,/* f - f */ +PUSHSTRING,/* w - STR[w] */ +PUSHFUNCTION,/* p - FUN(p) */ +PUSHLOCAL0,/* - LOC[0] */ +PUSHLOCAL1,/* - LOC[1] */ +PUSHLOCAL2,/* - LOC[2] */ +PUSHLOCAL3,/* - LOC[3] */ +PUSHLOCAL4,/* - LOC[4] */ +PUSHLOCAL5,/* - LOC[5] */ +PUSHLOCAL6,/* - LOC[6] */ +PUSHLOCAL7,/* - LOC[7] */ +PUSHLOCAL8,/* - LOC[8] */ +PUSHLOCAL9,/* - LOC[9] */ +PUSHLOCAL,/* w - LOC[w] */ +PUSHGLOBAL,/* w - VAR[w] */ +PUSHINDEXED,/* i t t[i] */ +PUSHSELF,/* w t t t[STR[w]] */ +STORELOCAL0,/* x - LOC[0]=x */ +STORELOCAL1,/* x - LOC[1]=x */ +STORELOCAL2,/* x - LOC[2]=x */ +STORELOCAL3,/* x - LOC[3]=x */ +STORELOCAL4,/* x - LOC[4]=x */ +STORELOCAL5,/* x - LOC[5]=x */ +STORELOCAL6,/* x - LOC[6]=x */ +STORELOCAL7,/* x - LOC[7]=x */ +STORELOCAL8,/* x - LOC[8]=x */ +STORELOCAL9,/* x - LOC[9]=x */ +STORELOCAL,/* w x - LOC[w]=x */ +STOREGLOBAL,/* w x - VAR[w]=x */ +STOREINDEXED0,/* v i t - t[i]=v */ +STOREINDEXED,/* b v a_b...a_1 i t a_b...a_1 i t t[i]=v */ +STORELIST0,/* w v_w...v_1 t - t[i]=v_i */ +STORELIST,/* w n v_w...v_1 t - t[i+n*FPF]=v_i */ +STORERECORD,/* n + w_n...w_1 v_n...v_1 t - t[STR[w_i]]=v_i */ +ADJUST0,/* - - TOP=BASE */ +ADJUST,/* b - - TOP=BASE+b */ +CREATEARRAY,/* w - newarray(size = w) */ +EQOP,/* y x (x==y)? 1 : nil */ +LTOP,/* y x (xy)? 1 : nil */ +GEOP,/* y x (x>=y)? 1 : nil */ +ADDOP,/* y x x+y */ +SUBOP,/* y x x-y */ +MULTOP,/* y x x*y */ +DIVOP,/* y x x/y */ +POWOP,/* y x x^y */ +CONCOP,/* y x x..y */ +MINUSOP,/* x -x */ +NOTOP,/* x (x==nil)? 1 : nil */ +ONTJMP,/* w x - (x!=nil)? PC+=w */ +ONFJMP,/* w x - (x==nil)? PC+=w */ +JMP,/* w - - PC+=w */ +UPJMP,/* w - - PC-=w */ +IFFJMP,/* w x - (x==nil)? PC+=w */ +IFFUPJMP,/* w x - (x==nil)? PC-=w */ +POP,/* x - */ +CALLFUNC,/* n m v_n...v_1 f r_m...r_1 f(v1,...,v_n) */ +RETCODE0, +RETCODE,/* b - - */ +SETLINE,/* w - - LINE=w */ +VARARGS/* b v_n...v_1 {v_1...v_n;n=n} */ + +} OpCode; + + +#define MULT_RET 255 + + +typedef union +{ + lua_CFunction f; + real n; + TaggedString *ts; + TFunc *tf; + struct Hash *a; + void *u; + int i; +} Value; + +typedef struct Object +{ + lua_Type tag; + Value value; +} Object; + + +/* Macros to access structure members */ +#define tag(o) ((o)->tag) +#define nvalue(o) ((o)->value.n) +#define svalue(o) ((o)->value.ts->str) +#define tsvalue(o) ((o)->value.ts) +#define avalue(o) ((o)->value.a) +#define fvalue(o) ((o)->value.f) +#define uvalue(o) ((o)->value.u) + +/* Macros to access symbol table */ +#define s_object(i) (lua_table[i].object) +#define s_tag(i) (tag(&s_object(i))) +#define s_nvalue(i) (nvalue(&s_object(i))) +#define s_svalue(i) (svalue(&s_object(i))) +#define s_tsvalue(i) (tsvalue(&s_object(i))) +#define s_avalue(i) (avalue(&s_object(i))) +#define s_fvalue(i) (fvalue(&s_object(i))) +#define s_uvalue(i) (uvalue(&s_object(i))) + +#define get_word(code,pc) {memcpy(&code, pc, sizeof(Word)); pc+=sizeof(Word);} +#define get_float(code,pc){memcpy(&code, pc, sizeof(real)); pc+=sizeof(real);} +#define get_code(code,pc) {memcpy(&code, pc, sizeof(TFunc *)); \ + pc+=sizeof(TFunc *);} + + +/* Exported functions */ +void lua_parse (TFunc *tf); /* from "lua.stx" module */ +void luaI_codedebugline (int line); /* from "lua.stx" module */ +void lua_travstack (int (*fn)(Object *)); +Object *luaI_Address (lua_Object o); +void luaI_pushobject (Object *o); +void luaI_gcFB (Object *o); +int luaI_dorun (TFunc *tf); + +#endif diff --git a/lib/lua/src/parser.c b/lib/lua/src/parser.c new file mode 100644 index 0000000..c91ee00 --- /dev/null +++ b/lib/lua/src/parser.c @@ -0,0 +1,1668 @@ +#ifndef lint +static char luaY_sccsid[] = "@(#)yaccpar 1.9 (Berkeley) 02/21/93"; +#endif +#define YYBYACC 1 +#define YYMAJOR 1 +#define YYMINOR 9 +#define luaY_clearin (luaY_char=(-1)) +#define luaY_errok (luaY_errflag=0) +#define YYRECOVERING (luaY_errflag!=0) +#define YYPREFIX "luaY_" +#line 2 "lua.stx" + +char *rcs_luastx = "$Id: parser.c,v 1.1 1996/11/21 16:11:40 lhf Exp $"; + +#include +#include +#include + +#include "luadebug.h" +#include "mem.h" +#include "lex.h" +#include "opcode.h" +#include "hash.h" +#include "inout.h" +#include "tree.h" +#include "table.h" +#include "lua.h" +#include "func.h" + +/* to avoid warnings generated by yacc */ +int luaY_parse (void); +#define malloc luaI_malloc +#define realloc luaI_realloc +#define free luaI_free + +#ifndef LISTING +#define LISTING 0 +#endif + +#ifndef CODE_BLOCK +#define CODE_BLOCK 256 +#endif +static int maxcode; +static int maxmain; +static int maxcurr; +static Byte *funcCode = NULL; +static Byte **initcode; +static Byte *basepc; +static int maincode; +static int pc; + + +#define MAXVAR 32 +static Long varbuffer[MAXVAR]; /* variables in an assignment list; + it's long to store negative Word values */ +static int nvarbuffer=0; /* number of variables at a list */ + +#define MAXLOCALS 32 +static TaggedString *localvar[MAXLOCALS]; /* store local variable names */ +static int nlocalvar=0; /* number of local variables */ + +#define MAXFIELDS FIELDS_PER_FLUSH*2 +static Word fields[MAXFIELDS]; /* fieldnames to be flushed */ +static int nfields=0; + +int lua_debug = 0; + +/* Internal functions */ + +static void luaY_error (char *s) +{ + luaI_syntaxerror(s); +} + +static void check_space (int i) +{ + if (pc+i>maxcurr-1) /* 1 byte free to code HALT of main code */ + maxcurr = growvector(&basepc, maxcurr, Byte, codeEM, MAX_INT); +} + +static void code_byte (Byte c) +{ + check_space(1); + basepc[pc++] = c; +} + +static void code_word (Word n) +{ + check_space(sizeof(Word)); + memcpy(basepc+pc, &n, sizeof(Word)); + pc += sizeof(Word); +} + +static void code_float (real n) +{ + check_space(sizeof(real)); + memcpy(basepc+pc, &n, sizeof(real)); + pc += sizeof(real); +} + +static void code_code (TFunc *tf) +{ + check_space(sizeof(TFunc *)); + memcpy(basepc+pc, &tf, sizeof(TFunc *)); + pc += sizeof(TFunc *); +} + +static void code_word_at (Byte *p, int n) +{ + Word w = n; + if (w != n) + luaY_error("block too big"); + memcpy(p, &w, sizeof(Word)); +} + +static void push_field (Word name) +{ + if (nfields < MAXFIELDS) + fields[nfields++] = name; + else + luaY_error ("too many fields in nested constructors"); +} + +static void flush_record (int n) +{ + int i; + if (n == 0) return; + code_byte(STORERECORD); + code_byte(n); + for (i=0; i= 0; i--) + if (n == localvar[i]) return i; /* local var */ + return -1; /* global var */ +} + +/* +** Push a variable given a number. If number is positive, push global variable +** indexed by (number -1). If negative, push local indexed by ABS(number)-1. +** Otherwise, if zero, push indexed variable (record). +*/ +static void lua_pushvar (Long number) +{ + if (number > 0) /* global var */ + { + code_byte(PUSHGLOBAL); + code_word(number-1); + } + else if (number < 0) /* local var */ + { + number = (-number) - 1; + if (number < 10) code_byte(PUSHLOCAL0 + number); + else + { + code_byte(PUSHLOCAL); + code_byte(number); + } + } + else + { + code_byte(PUSHINDEXED); + } +} + +static void lua_codeadjust (int n) +{ + if (n+nlocalvar == 0) + code_byte(ADJUST0); + else + { + code_byte(ADJUST); + code_byte(n+nlocalvar); + } +} + +static void change2main (void) +{ + /* (re)store main values */ + pc=maincode; basepc=*initcode; maxcurr=maxmain; + nlocalvar=0; +} + +static void savemain (void) +{ + /* save main values */ + maincode=pc; *initcode=basepc; maxmain=maxcurr; +} + +static void init_func (void) +{ + if (funcCode == NULL) /* first function */ + { + funcCode = newvector(CODE_BLOCK, Byte); + maxcode = CODE_BLOCK; + } + savemain(); /* save main values */ + /* set func values */ + pc=0; basepc=funcCode; maxcurr=maxcode; + nlocalvar = 0; + luaI_codedebugline(lua_linenumber); +} + +static void codereturn (void) +{ + if (nlocalvar == 0) + code_byte(RETCODE0); + else + { + code_byte(RETCODE); + code_byte(nlocalvar); + } +} + +void luaI_codedebugline (int line) +{ + static int lastline = 0; + if (lua_debug && line != lastline) + { + code_byte(SETLINE); + code_word(line); + lastline = line; + } +} + +static int adjust_functioncall (Long exp, int i) +{ + if (exp <= 0) + return -exp; /* exp is -list length */ + else + { + int temp = basepc[exp]; + basepc[exp] = i; + return temp+i; + } +} + +static void adjust_mult_assign (int vars, Long exps, int temps) +{ + if (exps > 0) + { /* must correct function call */ + int diff = vars - basepc[exps]; + if (diff >= 0) + adjust_functioncall(exps, diff); + else + { + adjust_functioncall(exps, 0); + lua_codeadjust(temps); + } + } + else if (vars != -exps) + lua_codeadjust(temps); +} + +static int close_parlist (int dots) +{ + if (!dots) + lua_codeadjust(0); + else + { + code_byte(VARARGS); + code_byte(nlocalvar); + add_localvar(luaI_createfixedstring("arg")); + } + return lua_linenumber; +} + +static void storesinglevar (Long v) +{ + if (v > 0) /* global var */ + { + code_byte(STOREGLOBAL); + code_word(v-1); + } + else if (v < 0) /* local var */ + { + int number = (-v) - 1; + if (number < 10) code_byte(STORELOCAL0 + number); + else + { + code_byte(STORELOCAL); + code_byte(number); + } + } + else + code_byte(STOREINDEXED0); +} + +static void lua_codestore (int i) +{ + if (varbuffer[i] != 0) /* global or local var */ + storesinglevar(varbuffer[i]); + else /* indexed var */ + { + int j; + int upper=0; /* number of indexed variables upper */ + int param; /* number of itens until indexed expression */ + for (j=i+1; j code); + *initcode = newvector(CODE_BLOCK, Byte); + maincode = 0; + maxmain = CODE_BLOCK; + change2main(); + if (luaY_parse ()) lua_error("parse error"); + savemain(); + (*initcode)[maincode++] = RETCODE0; + tf->size = maincode; +#if LISTING +{ static void PrintCode (Byte *c, Byte *end); + PrintCode(*initcode,*initcode+maincode); } +#endif +} + + +#line 414 "lua.stx" +typedef union +{ + int vInt; + float vFloat; + char *pChar; + Word vWord; + Long vLong; + TFunc *pFunc; + TaggedString *pTStr; +} YYSTYPE; +#line 433 "y.tab.c" +#define WRONGTOKEN 257 +#define NIL 258 +#define IF 259 +#define THEN 260 +#define ELSE 261 +#define ELSEIF 262 +#define WHILE 263 +#define DO 264 +#define REPEAT 265 +#define UNTIL 266 +#define END 267 +#define RETURN 268 +#define LOCAL 269 +#define FUNCTION 270 +#define DOTS 271 +#define NUMBER 272 +#define STRING 273 +#define NAME 274 +#define AND 275 +#define OR 276 +#define EQ 277 +#define NE 278 +#define LE 279 +#define GE 280 +#define CONC 281 +#define UNARY 282 +#define NOT 283 +#define YYERRCODE 256 +short luaY_lhs[] = { -1, + 0, 24, 24, 24, 28, 22, 22, 23, 31, 31, + 27, 27, 26, 34, 26, 35, 26, 26, 26, 26, + 33, 33, 33, 36, 30, 25, 25, 1, 32, 5, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, + 38, 5, 39, 5, 40, 37, 4, 8, 8, 7, + 7, 2, 2, 3, 41, 3, 17, 17, 18, 18, + 19, 19, 42, 9, 9, 14, 14, 43, 43, 12, + 12, 13, 13, 44, 15, 15, 16, 16, 6, 6, + 20, 20, 20, 21, 29, 10, 10, 11, 11, +}; +short luaY_len[] = { 2, + 2, 0, 3, 2, 3, 1, 3, 5, 0, 3, + 0, 1, 8, 0, 8, 0, 6, 3, 1, 3, + 0, 2, 7, 0, 3, 0, 3, 0, 1, 3, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 2, 1, 1, 1, 1, 1, 1, 2, + 0, 5, 0, 5, 0, 4, 2, 1, 3, 3, + 1, 0, 1, 1, 0, 4, 0, 1, 1, 3, + 1, 1, 0, 3, 2, 0, 2, 0, 1, 0, + 2, 1, 3, 3, 0, 2, 1, 3, 1, 3, + 1, 4, 3, 1, 1, 1, 3, 0, 2, +}; +short luaY_defred[] = { 2, + 0, 0, 0, 14, 16, 0, 0, 0, 94, 19, + 0, 0, 0, 91, 1, 0, 4, 0, 48, 46, + 47, 0, 0, 0, 49, 29, 95, 0, 0, 44, + 0, 0, 24, 0, 0, 0, 0, 96, 0, 0, + 0, 0, 0, 0, 0, 57, 61, 12, 3, 0, + 0, 0, 0, 0, 0, 28, 28, 28, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 9, 27, 65, 0, 0, 20, 0, + 5, 0, 0, 0, 0, 0, 59, 0, 93, 30, + 24, 51, 53, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 73, 0, + 0, 82, 28, 0, 0, 0, 0, 97, 72, 71, + 0, 0, 69, 7, 60, 92, 28, 0, 0, 0, + 56, 0, 75, 0, 0, 86, 24, 0, 25, 0, + 0, 24, 0, 0, 0, 0, 0, 0, 83, 0, + 74, 0, 28, 17, 10, 0, 70, 24, 0, 0, + 77, 0, 0, 8, 22, 0, 13, 81, 15, 28, + 24, 28, 0, 23, +}; +short luaY_dgoto[] = { 1, + 91, 34, 35, 25, 26, 11, 46, 12, 107, 39, + 79, 161, 108, 151, 109, 110, 121, 122, 123, 27, + 14, 41, 81, 2, 15, 16, 49, 17, 28, 73, + 115, 37, 160, 32, 33, 74, 30, 128, 129, 31, + 116, 134, 133, 112, +}; +short luaY_sindex[] = { 0, + 0, 332, -38, 0, 0, -38, -239, -223, 0, 0, + -23, 17, 0, 0, 0, 3, 0, 137, 0, 0, + 0, -38, -38, -38, 0, 0, 0, 137, 547, 0, + -25, -38, 0, 3, 45, 0, 212, 0, -22, 0, + 52, 140, -38, -223, -38, 0, 0, 0, 0, -166, + -38, -154, 40, 40, 102, 0, 0, 0, -38, -38, + -38, -38, -38, -38, -38, -38, -38, -38, -38, -38, + -34, 481, -130, 0, 0, 0, -38, -129, 0, -194, + 0, -123, 45, 0, -17, 103, 0, 753, 0, 0, + 0, 0, 0, -30, -30, -30, -30, -30, -30, 95, + 11, 11, 40, 40, 40, 97, 41, 123, 0, 124, + 212, 0, 0, -38, -59, -38, 45, 0, 0, 0, + 128, 131, 0, 0, 0, 0, 0, -38, -38, -38, + 0, -97, 0, 120, -38, 0, 0, 212, 0, 3, + 0, 0, -194, -183, 118, 118, 212, 97, 0, -97, + 0, 212, 0, 0, 0, -85, 0, 0, -38, -82, + 0, 123, -80, 0, 0, 1105, 0, 0, 0, 0, + 0, 0, -183, 0, +}; +short luaY_rindex[] = { 0, + 0, 191, 69, 0, 0, 173, 0, 0, 0, 0, + 0, 69, 150, 0, 0, 146, 0, -36, 0, 0, + 0, 69, 69, 69, 0, 0, 0, 1, 0, 0, + 0, 69, 0, 47, 461, 436, 0, 0, 197, 130, + 0, 0, 69, 0, -33, 0, 0, 0, 0, 0, + 69, 0, 24, 59, 1181, 0, 0, 0, 69, 69, + 69, 69, 69, 69, 69, 69, 69, 69, 69, 69, + -50, 0, 0, 0, 0, 0, 69, 0, 0, 152, + 0, 0, 311, -21, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 746, 776, 799, 821, 844, 866, 505, + 383, 410, 88, 112, 359, 1174, 0, 74, 0, -40, + -26, 0, 0, 69, -230, 69, 921, 0, 0, 0, + 0, 160, 0, 0, 0, 0, 0, 69, 69, 69, + 0, 77, 0, 78, -9, 0, 0, 939, 0, 289, + 474, 0, 0, -60, 894, 1137, -16, 0, 0, 89, + 0, -10, 0, 0, 0, 0, 0, 0, 69, 0, + 0, 74, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, -60, 0, +}; +short luaY_gindex[] = { 0, + -31, 171, 85, -2, 48, 0, 0, 0, 0, 0, + 0, 0, 67, 0, 0, 0, 0, 0, 75, 8, + 0, 0, 0, 0, 104, 107, -29, 0, 12, -61, + 0, 1260, 50, 0, 0, 0, 213, 0, 0, 0, + 0, 0, -107, 94, +}; +#define YYTABLESIZE 1462 +short luaY_table[] = { 10, + 45, 24, 136, 58, 75, 24, 22, 62, 85, 13, + 22, 68, 66, 18, 67, 40, 69, 87, 78, 42, + 44, 78, 90, 43, 95, 92, 93, 84, 52, 127, + 26, 26, 87, 88, 38, 26, 26, 43, 77, 90, + 58, 45, 45, 45, 45, 45, 11, 45, 88, 79, + 9, 84, 68, 36, 168, 85, 45, 69, 50, 45, + 45, 48, 45, 70, 43, 43, 43, 43, 43, 95, + 43, 55, 55, 51, 85, 153, 119, 158, 159, 120, + 156, 137, 43, 43, 78, 43, 58, 39, 76, 55, + 36, 80, 36, 45, 45, 144, 165, 71, 87, 50, + 50, 50, 50, 50, 70, 50, 154, 87, 84, 172, + 155, 40, 10, 55, 88, 79, 43, 50, 50, 89, + 50, 163, 13, 58, 36, 45, 18, 83, 39, 39, + 39, 39, 39, 70, 39, 114, 68, 66, 171, 67, + 173, 69, 90, 125, 118, 11, 39, 39, 43, 39, + 124, 50, 40, 40, 40, 40, 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0, 36, 0, 0, + 0, 0, 0, 0, 52, 0, 35, 52, 28, 0, + 0, 0, 0, 0, 0, 32, 0, 0, 0, 0, + 0, 0, 52, 0, 0, 0, 0, 0, 36, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 35, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 99, + 0, 0, 0, 0, 0, 0, 52, 0, 0, 0, + 36, 0, 0, 0, 0, 0, 0, 28, 0, 0, + 0, 0, 0, 0, 31, 31, 31, 31, 31, 31, + 31, 31, 31, 31, 31, 31, 0, 0, 52, 31, + 31, 31, 31, 31, 31, 31, 0, 57, 58, 59, + 60, 63, 64, 65, 34, 34, 34, 34, 34, 34, + 34, 34, 34, 34, 34, 34, 0, 0, 0, 34, + 34, 34, 34, 34, 34, 34, 0, 33, 33, 33, + 33, 33, 33, 33, 33, 33, 33, 33, 33, 0, + 0, 0, 33, 33, 33, 33, 33, 33, 33, 32, + 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, + 32, 0, 0, 0, 32, 32, 32, 32, 32, 32, + 32, 0, 35, 35, 35, 35, 35, 35, 35, 35, + 35, 35, 35, 35, 0, 0, 0, 35, 35, 35, + 35, 35, 35, 35, 36, 36, 36, 36, 36, 36, + 36, 36, 36, 36, 36, 36, 54, 0, 0, 36, + 36, 36, 36, 36, 36, 36, 68, 66, 0, 67, + 0, 69, 52, 52, 52, 52, 52, 52, 52, 52, + 52, 52, 52, 52, 62, 0, 61, 52, 52, 52, + 0, 0, 0, 0, 0, 0, 0, 54, 0, 99, + 54, 99, 99, 99, 0, 99, 99, 99, 99, 99, + 99, 0, 0, 0, 99, 54, 0, 28, 70, 28, + 28, 28, 0, 28, 28, 28, 28, 28, 28, 0, + 0, 0, 28, 94, 0, 94, 94, 94, 94, 94, + 94, 0, 29, 29, 0, 29, 0, 29, 0, 54, + 0, 94, 94, 94, 0, 94, 0, 0, 0, 0, + 29, 0, 29, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 54, 29, 0, 94, 0, 0, 94, 0, 0, + 0, 0, 0, 0, 29, 0, 0, 0, 0, 0, + 0, 53, 54, 0, 0, 0, 0, 0, 0, 0, + 0, 72, 0, 0, 0, 0, 94, 0, 94, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 88, 0, 0, 0, 0, 0, 0, 0, 94, 95, + 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, + 111, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 170, 0, 0, 0, 0, 0, + 0, 0, 0, 138, 0, 0, 0, 0, 0, 57, + 58, 59, 60, 63, 64, 65, 0, 145, 146, 147, + 0, 0, 0, 0, 152, 54, 54, 54, 54, 54, + 54, 54, 54, 54, 54, 54, 54, 0, 0, 0, + 54, 54, 54, 0, 0, 0, 0, 0, 166, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 94, 94, + 94, 94, 94, 94, 94, 29, 29, 29, 29, 29, + 29, 29, +}; +short luaY_check[] = { 2, + 0, 40, 110, 40, 34, 40, 45, 41, 59, 2, + 45, 42, 43, 2, 45, 8, 47, 44, 59, 8, + 44, 44, 44, 0, 46, 57, 58, 44, 46, 91, + 261, 262, 59, 44, 274, 266, 267, 61, 61, 61, + 40, 41, 42, 43, 44, 45, 0, 47, 59, 59, + 274, 44, 42, 6, 162, 44, 40, 47, 0, 59, + 60, 59, 62, 94, 41, 42, 43, 44, 45, 91, + 47, 24, 123, 91, 125, 137, 271, 261, 262, 274, + 142, 113, 59, 60, 125, 62, 123, 0, 44, 123, + 43, 40, 45, 93, 94, 127, 158, 123, 125, 41, + 42, 43, 44, 45, 94, 47, 138, 274, 125, 171, + 140, 0, 115, 123, 125, 125, 93, 59, 60, 274, + 62, 153, 115, 123, 77, 125, 115, 43, 41, 42, + 43, 44, 45, 94, 47, 266, 42, 43, 170, 45, + 172, 47, 41, 41, 274, 0, 59, 60, 125, 62, + 274, 93, 41, 42, 43, 44, 45, 61, 47, 42, + 43, 77, 45, 116, 47, 125, 44, 44, 41, 40, + 59, 60, 0, 62, 44, 46, 274, 60, 59, 62, + 93, 267, 46, 125, 267, 46, 267, 58, 94, 40, + 0, 123, 41, 44, 58, 46, 0, 58, 125, 259, + 41, 125, 125, 263, 93, 265, 267, 58, 268, 269, + 61, 94, 125, 125, 274, 45, 150, 143, 115, 258, + 91, 115, 173, 258, 12, 132, -1, 91, -1, -1, + 91, 59, -1, 272, 273, 274, 125, 272, 273, 274, + 91, -1, -1, -1, 283, -1, -1, -1, 283, -1, + 281, -1, -1, 42, 43, 59, 45, -1, 47, 259, + 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, + 270, 60, 123, 62, 274, 275, 276, 277, 278, 279, + 280, 281, 259, 260, 261, 262, 263, 264, 265, 266, + 267, 268, 269, 270, -1, 123, -1, 274, 275, 276, + 277, 278, 279, 280, 281, 94, -1, 261, 262, -1, + 0, -1, 266, 267, -1, -1, -1, 259, 260, 261, + 262, 263, 264, 265, 266, 267, 268, 269, 270, -1, + -1, -1, 274, 275, 276, 277, 278, 279, 280, 281, + -1, -1, -1, -1, -1, -1, 259, 260, 261, 262, + 263, 264, 265, 266, 267, 268, 269, 270, 0, -1, + -1, 274, 275, 276, 277, 278, 279, 280, 281, 59, + 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, + 269, 270, 0, -1, -1, 274, 275, 276, 277, 278, + 279, 280, 281, -1, 277, 278, 279, 280, 281, 41, + 42, 43, 44, 45, 259, 47, -1, -1, 263, 0, + 265, -1, -1, 268, 269, 270, -1, 59, 60, 274, + 62, -1, -1, 41, -1, 43, 44, 45, -1, -1, + -1, -1, -1, 261, 262, 0, -1, -1, 266, 267, + -1, 59, 60, -1, 62, -1, -1, -1, -1, -1, + 41, 93, 43, 44, 45, 259, -1, 261, 262, 263, + 0, 265, 266, 267, 268, 269, 270, -1, 59, 60, + 274, 62, -1, 0, -1, 93, 41, 42, 43, 44, + 45, -1, 47, 125, -1, -1, 275, 276, 277, 278, + 279, 280, 281, -1, 59, 60, -1, 62, -1, -1, + -1, 41, 93, -1, 0, -1, -1, 125, -1, -1, + -1, -1, -1, -1, 41, 42, 43, 44, 45, 59, + 47, -1, 42, 43, -1, 45, -1, 47, -1, 94, + -1, -1, 59, 60, 125, 62, -1, -1, -1, -1, + 60, -1, 62, -1, -1, 41, -1, 259, 44, 261, + 262, 263, -1, 265, 266, 267, 268, 269, -1, -1, + -1, -1, 274, 59, 60, -1, 62, 94, -1, 259, + -1, 261, 262, 263, 94, 265, 266, 267, 268, 269, + 270, -1, -1, -1, 274, -1, -1, -1, 42, 43, + 259, 45, -1, 47, 263, -1, 265, 93, -1, 268, + 269, 270, -1, -1, -1, 274, 60, -1, 62, -1, + -1, -1, -1, -1, -1, -1, -1, 259, 260, 261, + 262, 263, 264, 265, 266, 267, 268, 269, 270, 125, + -1, -1, 274, 275, 276, 277, 278, 279, 280, 281, + 94, 259, 260, 261, 262, 263, 264, 265, 266, 267, + 268, 269, 270, -1, -1, -1, 274, 275, 276, 277, + 278, 279, 280, 281, -1, -1, -1, -1, 259, 260, + 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, + -1, -1, -1, 274, 275, 276, 277, 278, 279, 280, + 281, -1, -1, -1, 259, -1, 261, 262, 263, -1, + 265, 266, 267, 268, 269, 270, -1, -1, -1, 274, + 275, 276, 277, 278, 279, 280, 281, -1, -1, -1, + -1, 261, 262, -1, -1, -1, 266, 267, -1, -1, + -1, -1, 259, -1, 261, 262, 263, -1, 265, 266, + 267, 268, 269, 270, 264, 0, -1, 274, 275, 276, + 277, 278, 279, 280, 281, 275, 276, 277, 278, 279, + 280, 281, -1, 259, 260, 261, 262, 263, 264, 265, + 266, 267, 268, 269, 270, 0, -1, -1, 274, 275, + 276, 277, 278, 279, 280, 281, 41, -1, -1, 44, + -1, -1, -1, -1, 42, 43, -1, 45, 0, 47, + -1, -1, -1, -1, 59, 60, 260, 62, -1, -1, + -1, -1, 60, -1, 62, -1, 41, -1, -1, 44, + 0, 275, 276, 277, 278, 279, 280, 281, -1, -1, + -1, -1, -1, -1, 59, 60, -1, 62, 93, 41, + -1, -1, 44, 0, -1, 93, 94, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, 59, 60, -1, + 62, 41, -1, -1, 44, 0, -1, -1, 93, -1, + 125, -1, -1, -1, -1, -1, -1, -1, -1, 59, + 60, -1, 62, -1, 41, -1, -1, 44, -1, -1, + -1, 93, -1, 0, -1, -1, -1, -1, -1, -1, + 125, -1, 59, 60, -1, 62, 41, -1, -1, 44, + -1, -1, -1, 93, -1, -1, -1, -1, -1, -1, + 0, -1, -1, 125, 59, 60, -1, 62, -1, -1, + -1, -1, -1, -1, 41, -1, 93, 44, 0, -1, + -1, -1, -1, -1, -1, 125, -1, -1, -1, -1, + -1, -1, 59, -1, -1, -1, -1, -1, 93, -1, + -1, -1, -1, -1, -1, -1, -1, -1, 125, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, 59, + -1, -1, -1, -1, -1, -1, 93, -1, -1, -1, + 125, -1, -1, -1, -1, -1, -1, 59, -1, -1, + -1, -1, -1, -1, 259, 260, 261, 262, 263, 264, + 265, 266, 267, 268, 269, 270, -1, -1, 125, 274, + 275, 276, 277, 278, 279, 280, -1, 275, 276, 277, + 278, 279, 280, 281, 259, 260, 261, 262, 263, 264, + 265, 266, 267, 268, 269, 270, -1, -1, -1, 274, + 275, 276, 277, 278, 279, 280, -1, 259, 260, 261, + 262, 263, 264, 265, 266, 267, 268, 269, 270, -1, + -1, -1, 274, 275, 276, 277, 278, 279, 280, 259, + 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, + 270, -1, -1, -1, 274, 275, 276, 277, 278, 279, + 280, -1, 259, 260, 261, 262, 263, 264, 265, 266, + 267, 268, 269, 270, -1, -1, -1, 274, 275, 276, + 277, 278, 279, 280, 259, 260, 261, 262, 263, 264, + 265, 266, 267, 268, 269, 270, 0, -1, -1, 274, + 275, 276, 277, 278, 279, 280, 42, 43, -1, 45, + -1, 47, 259, 260, 261, 262, 263, 264, 265, 266, + 267, 268, 269, 270, 60, -1, 62, 274, 275, 276, + -1, -1, -1, -1, -1, -1, -1, 41, -1, 259, + 44, 261, 262, 263, -1, 265, 266, 267, 268, 269, + 270, -1, -1, -1, 274, 59, -1, 259, 94, 261, + 262, 263, -1, 265, 266, 267, 268, 269, 270, -1, + -1, -1, 274, 40, -1, 42, 43, 44, 45, 46, + 47, -1, 42, 43, -1, 45, -1, 47, -1, 93, + -1, 58, 59, 60, -1, 62, -1, -1, -1, -1, + 60, -1, 62, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, 125, 3, -1, 91, -1, -1, 94, -1, -1, + -1, -1, -1, -1, 94, -1, -1, -1, -1, -1, + -1, 22, 23, -1, -1, -1, -1, -1, -1, -1, + -1, 32, -1, -1, -1, -1, 123, -1, 125, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + 51, -1, -1, -1, -1, -1, -1, -1, 59, 60, + 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, + 71, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, 260, -1, -1, -1, -1, -1, + -1, -1, -1, 114, -1, -1, -1, -1, -1, 275, + 276, 277, 278, 279, 280, 281, -1, 128, 129, 130, + -1, -1, -1, -1, 135, 259, 260, 261, 262, 263, + 264, 265, 266, 267, 268, 269, 270, -1, -1, -1, + 274, 275, 276, -1, -1, -1, -1, -1, 159, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, 275, 276, + 277, 278, 279, 280, 281, 275, 276, 277, 278, 279, + 280, 281, +}; +#define YYFINAL 1 +#ifndef YYDEBUG +#define YYDEBUG 0 +#endif +#define YYMAXTOKEN 283 +#if YYDEBUG +char *luaY_name[] = { +"end-of-file",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, +0,0,0,0,0,0,"'('","')'","'*'","'+'","','","'-'","'.'","'/'",0,0,0,0,0,0,0,0,0,0, +"':'","';'","'<'","'='","'>'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, +0,0,0,"'['",0,"']'","'^'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, +0,"'{'",0,"'}'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, +0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, +0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, +0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"WRONGTOKEN","NIL","IF","THEN","ELSE", +"ELSEIF","WHILE","DO","REPEAT","UNTIL","END","RETURN","LOCAL","FUNCTION","DOTS", +"NUMBER","STRING","NAME","AND","OR","EQ","NE","LE","GE","CONC","UNARY","NOT", +}; +char *luaY_rule[] = { +"$accept : chunk", +"chunk : chunklist ret", +"chunklist :", +"chunklist : chunklist stat sc", +"chunklist : chunklist function", +"function : FUNCTION funcname body", +"funcname : var", +"funcname : varexp ':' NAME", +"body : '(' parlist ')' block END", +"statlist :", +"statlist : statlist stat sc", +"sc :", +"sc : ';'", +"stat : IF expr1 THEN PrepJump block PrepJump elsepart END", +"$$1 :", +"stat : WHILE $$1 expr1 DO PrepJump block PrepJump END", +"$$2 :", +"stat : REPEAT $$2 block UNTIL expr1 PrepJump", +"stat : varlist1 '=' exprlist1", +"stat : functioncall", +"stat : LOCAL localdeclist decinit", +"elsepart :", +"elsepart : ELSE block", +"elsepart : ELSEIF expr1 THEN PrepJump block PrepJump elsepart", +"$$3 :", +"block : $$3 statlist ret", +"ret :", +"ret : RETURN exprlist sc", +"PrepJump :", +"expr1 : expr", +"expr : '(' expr ')'", +"expr : expr1 EQ expr1", +"expr : expr1 '<' expr1", +"expr : expr1 '>' expr1", +"expr : expr1 NE expr1", +"expr : expr1 LE expr1", +"expr : expr1 GE expr1", +"expr : expr1 '+' expr1", +"expr : expr1 '-' expr1", +"expr : expr1 '*' expr1", +"expr : expr1 '/' expr1", +"expr : expr1 '^' expr1", +"expr : expr1 CONC expr1", +"expr : '-' expr1", +"expr : table", +"expr : varexp", +"expr : NUMBER", +"expr : STRING", +"expr : NIL", +"expr : functioncall", +"expr : NOT expr1", +"$$4 :", +"expr : expr1 AND PrepJump $$4 expr1", +"$$5 :", +"expr : expr1 OR PrepJump $$5 expr1", +"$$6 :", +"table : $$6 '{' fieldlist '}'", +"functioncall : funcvalue funcParams", +"funcvalue : varexp", +"funcvalue : varexp ':' NAME", +"funcParams : '(' exprlist ')'", +"funcParams : table", +"exprlist :", +"exprlist : exprlist1", +"exprlist1 : expr", +"$$7 :", +"exprlist1 : exprlist1 ',' $$7 expr", +"parlist :", +"parlist : parlist1", +"parlist1 : par", +"parlist1 : parlist1 ',' par", +"par : NAME", +"par : DOTS", +"$$8 :", +"fieldlist : lfieldlist $$8 semicolonpart", +"fieldlist : ffieldlist1 lastcomma", +"semicolonpart :", +"semicolonpart : ';' ffieldlist", +"lastcomma :", +"lastcomma : ','", +"ffieldlist :", +"ffieldlist : ffieldlist1 lastcomma", +"ffieldlist1 : ffield", +"ffieldlist1 : ffieldlist1 ',' ffield", +"ffield : NAME '=' expr1", +"lfieldlist :", +"lfieldlist : lfieldlist1 lastcomma", +"lfieldlist1 : expr1", +"lfieldlist1 : lfieldlist1 ',' expr1", +"varlist1 : var", +"varlist1 : varlist1 ',' var", +"var : singlevar", +"var : varexp '[' expr1 ']'", +"var : varexp '.' NAME", +"singlevar : NAME", +"varexp : var", +"localdeclist : NAME", +"localdeclist : localdeclist ',' NAME", +"decinit :", +"decinit : '=' exprlist1", +}; +#endif +#ifdef YYSTACKSIZE +#undef YYMAXDEPTH +#define YYMAXDEPTH YYSTACKSIZE +#else +#ifdef YYMAXDEPTH +#define YYSTACKSIZE YYMAXDEPTH +#else +#define YYSTACKSIZE 500 +#define YYMAXDEPTH 500 +#endif +#endif +int luaY_debug; +int luaY_nerrs; +int luaY_errflag; +int luaY_char; +short *luaY_ssp; +YYSTYPE *luaY_vsp; +YYSTYPE luaY_val; +YYSTYPE luaY_lval; +short luaY_ss[YYSTACKSIZE]; +YYSTYPE luaY_vs[YYSTACKSIZE]; +#define luaY_stacksize YYSTACKSIZE +#define YYABORT goto luaY_abort +#define YYREJECT goto luaY_abort +#define YYACCEPT goto luaY_accept +#define YYERROR goto luaY_errlab +int +luaY_parse() +{ + register int luaY_m, luaY_n, luaY_state; +#if YYDEBUG + register char *luaY_s; + extern char *getenv(); + + if (luaY_s = getenv("YYDEBUG")) + { + luaY_n = *luaY_s; + if (luaY_n >= '0' && luaY_n <= '9') + luaY_debug = luaY_n - '0'; + } +#endif + + luaY_nerrs = 0; + luaY_errflag = 0; + luaY_char = (-1); + + luaY_ssp = luaY_ss; + luaY_vsp = luaY_vs; + *luaY_ssp = luaY_state = 0; + +luaY_loop: + if (luaY_n = luaY_defred[luaY_state]) goto luaY_reduce; + if (luaY_char < 0) + { + if ((luaY_char = luaY_lex()) < 0) luaY_char = 0; +#if YYDEBUG + if (luaY_debug) + { + luaY_s = 0; + if (luaY_char <= YYMAXTOKEN) luaY_s = luaY_name[luaY_char]; + if (!luaY_s) luaY_s = "illegal-symbol"; + printf("%sdebug: state %d, reading %d (%s)\n", + YYPREFIX, luaY_state, luaY_char, luaY_s); + } +#endif + } + if ((luaY_n = luaY_sindex[luaY_state]) && (luaY_n += luaY_char) >= 0 && + luaY_n <= YYTABLESIZE && luaY_check[luaY_n] == luaY_char) + { +#if YYDEBUG + if (luaY_debug) + printf("%sdebug: state %d, shifting to state %d\n", + YYPREFIX, luaY_state, luaY_table[luaY_n]); +#endif + if (luaY_ssp >= luaY_ss + luaY_stacksize - 1) + { + goto luaY_overflow; + } + *++luaY_ssp = luaY_state = luaY_table[luaY_n]; + *++luaY_vsp = luaY_lval; + luaY_char = (-1); + if (luaY_errflag > 0) --luaY_errflag; + goto luaY_loop; + } + if ((luaY_n = luaY_rindex[luaY_state]) && (luaY_n += luaY_char) >= 0 && + luaY_n <= YYTABLESIZE && luaY_check[luaY_n] == luaY_char) + { + luaY_n = luaY_table[luaY_n]; + goto luaY_reduce; + } + if (luaY_errflag) goto luaY_inrecovery; +#ifdef lint + goto luaY_newerror; +#endif +luaY_newerror: + luaY_error("syntax error"); +#ifdef lint + goto luaY_errlab; +#endif +luaY_errlab: + ++luaY_nerrs; +luaY_inrecovery: + if (luaY_errflag < 3) + { + luaY_errflag = 3; + for (;;) + { + if ((luaY_n = luaY_sindex[*luaY_ssp]) && (luaY_n += YYERRCODE) >= 0 && + luaY_n <= YYTABLESIZE && luaY_check[luaY_n] == YYERRCODE) + { +#if YYDEBUG + if (luaY_debug) + printf("%sdebug: state %d, error recovery shifting\ + to state %d\n", YYPREFIX, *luaY_ssp, luaY_table[luaY_n]); +#endif + if (luaY_ssp >= luaY_ss + luaY_stacksize - 1) + { + goto luaY_overflow; + } + *++luaY_ssp = luaY_state = luaY_table[luaY_n]; + *++luaY_vsp = luaY_lval; + goto luaY_loop; + } + else + { +#if YYDEBUG + if (luaY_debug) + printf("%sdebug: error recovery discarding state %d\n", + YYPREFIX, *luaY_ssp); +#endif + if (luaY_ssp <= luaY_ss) goto luaY_abort; + --luaY_ssp; + --luaY_vsp; + } + } + } + else + { + if (luaY_char == 0) goto luaY_abort; +#if YYDEBUG + if (luaY_debug) + { + luaY_s = 0; + if (luaY_char <= YYMAXTOKEN) luaY_s = luaY_name[luaY_char]; + if (!luaY_s) luaY_s = "illegal-symbol"; + printf("%sdebug: state %d, error recovery discards token %d (%s)\n", + YYPREFIX, luaY_state, luaY_char, luaY_s); + } +#endif + luaY_char = (-1); + goto luaY_loop; + } +luaY_reduce: +#if YYDEBUG + if (luaY_debug) + printf("%sdebug: state %d, reducing by rule %d (%s)\n", + YYPREFIX, luaY_state, luaY_n, luaY_rule[luaY_n]); +#endif + luaY_m = luaY_len[luaY_n]; + luaY_val = luaY_vsp[1-luaY_m]; + switch (luaY_n) + { +case 5: +#line 470 "lua.stx" +{ + code_byte(PUSHFUNCTION); + code_code(luaY_vsp[0].pFunc); + storesinglevar(luaY_vsp[-1].vLong); + } +break; +case 6: +#line 477 "lua.stx" +{ luaY_val.vLong =luaY_vsp[0].vLong; init_func(); } +break; +case 7: +#line 479 "lua.stx" +{ + code_byte(PUSHSTRING); + code_word(luaI_findconstant(luaY_vsp[0].pTStr)); + luaY_val.vLong = 0; /* indexed variable */ + init_func(); + add_localvar(luaI_createfixedstring("self")); + } +break; +case 8: +#line 489 "lua.stx" +{ + codereturn(); + luaY_val.pFunc = new(TFunc); + luaI_initTFunc(luaY_val.pFunc); + luaY_val.pFunc->size = pc; + luaY_val.pFunc->code = newvector(pc, Byte); + luaY_val.pFunc->fileName = lua_parsedfile; + luaY_val.pFunc->lineDefined = luaY_vsp[-3].vInt; + memcpy(luaY_val.pFunc->code, basepc, pc*sizeof(Byte)); + if (lua_debug) + luaI_closelocalvars(luaY_val.pFunc); + /* save func values */ + funcCode = basepc; maxcode=maxcurr; +#if LISTING + PrintCode(funcCode,funcCode+pc); +#endif + change2main(); /* change back to main code */ + } +break; +case 13: +#line 516 "lua.stx" +{ codeIf(luaY_vsp[-4].vLong, luaY_vsp[-2].vLong); } +break; +case 14: +#line 518 "lua.stx" +{luaY_val.vLong=pc;} +break; +case 15: +#line 519 "lua.stx" +{ + basepc[luaY_vsp[-3].vLong] = IFFJMP; + code_word_at(basepc+luaY_vsp[-3].vLong+1, pc - (luaY_vsp[-3].vLong + sizeof(Word)+1)); + basepc[luaY_vsp[-1].vLong] = UPJMP; + code_word_at(basepc+luaY_vsp[-1].vLong+1, pc - (luaY_vsp[-6].vLong)); + } +break; +case 16: +#line 526 "lua.stx" +{luaY_val.vLong=pc;} +break; +case 17: +#line 527 "lua.stx" +{ + basepc[luaY_vsp[0].vLong] = IFFUPJMP; + code_word_at(basepc+luaY_vsp[0].vLong+1, pc - (luaY_vsp[-4].vLong)); + } +break; +case 18: +#line 533 "lua.stx" +{ + { + int i; + adjust_mult_assign(nvarbuffer, luaY_vsp[0].vLong, luaY_vsp[-2].vInt * 2 + nvarbuffer); + for (i=nvarbuffer-1; i>=0; i--) + lua_codestore (i); + if (luaY_vsp[-2].vInt > 1 || (luaY_vsp[-2].vInt == 1 && varbuffer[0] != 0)) + lua_codeadjust (0); + } + } +break; +case 20: +#line 545 "lua.stx" +{ nlocalvar += luaY_vsp[-1].vInt; + adjust_mult_assign(luaY_vsp[-1].vInt, luaY_vsp[0].vInt, 0); + } +break; +case 23: +#line 553 "lua.stx" +{ codeIf(luaY_vsp[-3].vLong, luaY_vsp[-1].vLong); } +break; +case 24: +#line 556 "lua.stx" +{luaY_val.vInt = nlocalvar;} +break; +case 25: +#line 557 "lua.stx" +{ + if (nlocalvar != luaY_vsp[-2].vInt) + { + if (lua_debug) + for (; nlocalvar > luaY_vsp[-2].vInt; nlocalvar--) + luaI_unregisterlocalvar(lua_linenumber); + else + nlocalvar = luaY_vsp[-2].vInt; + lua_codeadjust (0); + } + } +break; +case 27: +#line 572 "lua.stx" +{ + adjust_functioncall(luaY_vsp[-1].vLong, MULT_RET); + codereturn(); + } +break; +case 28: +#line 579 "lua.stx" +{ + luaY_val.vLong = pc; + code_byte(0); /* open space */ + code_word (0); + } +break; +case 29: +#line 586 "lua.stx" +{ adjust_functioncall(luaY_vsp[0].vLong, 1); } +break; +case 30: +#line 589 "lua.stx" +{ luaY_val.vLong = luaY_vsp[-1].vLong; } +break; +case 31: +#line 590 "lua.stx" +{ code_byte(EQOP); luaY_val.vLong = 0; } +break; +case 32: +#line 591 "lua.stx" +{ code_byte(LTOP); luaY_val.vLong = 0; } +break; +case 33: +#line 592 "lua.stx" +{ code_byte(GTOP); luaY_val.vLong = 0; } +break; +case 34: +#line 593 "lua.stx" +{ code_byte(EQOP); code_byte(NOTOP); luaY_val.vLong = 0; } +break; +case 35: +#line 594 "lua.stx" +{ code_byte(LEOP); luaY_val.vLong = 0; } +break; +case 36: +#line 595 "lua.stx" +{ code_byte(GEOP); luaY_val.vLong = 0; } +break; +case 37: +#line 596 "lua.stx" +{ code_byte(ADDOP); luaY_val.vLong = 0; } +break; +case 38: +#line 597 "lua.stx" +{ code_byte(SUBOP); luaY_val.vLong = 0; } +break; +case 39: +#line 598 "lua.stx" +{ code_byte(MULTOP); luaY_val.vLong = 0; } +break; +case 40: +#line 599 "lua.stx" +{ code_byte(DIVOP); luaY_val.vLong = 0; } +break; +case 41: +#line 600 "lua.stx" +{ code_byte(POWOP); luaY_val.vLong = 0; } +break; +case 42: +#line 601 "lua.stx" +{ code_byte(CONCOP); luaY_val.vLong = 0; } +break; +case 43: +#line 602 "lua.stx" +{ code_byte(MINUSOP); luaY_val.vLong = 0;} +break; +case 44: +#line 603 "lua.stx" +{ luaY_val.vLong = 0; } +break; +case 45: +#line 604 "lua.stx" +{ luaY_val.vLong = 0;} +break; +case 46: +#line 605 "lua.stx" +{ code_number(luaY_vsp[0].vFloat); luaY_val.vLong = 0; } +break; +case 47: +#line 607 "lua.stx" +{ + code_byte(PUSHSTRING); + code_word(luaY_vsp[0].vWord); + luaY_val.vLong = 0; + } +break; +case 48: +#line 612 "lua.stx" +{code_byte(PUSHNIL); luaY_val.vLong = 0; } +break; +case 49: +#line 613 "lua.stx" +{ luaY_val.vLong = luaY_vsp[0].vLong; } +break; +case 50: +#line 614 "lua.stx" +{ code_byte(NOTOP); luaY_val.vLong = 0;} +break; +case 51: +#line 615 "lua.stx" +{code_byte(POP); } +break; +case 52: +#line 616 "lua.stx" +{ + basepc[luaY_vsp[-2].vLong] = ONFJMP; + code_word_at(basepc+luaY_vsp[-2].vLong+1, pc - (luaY_vsp[-2].vLong + sizeof(Word)+1)); + luaY_val.vLong = 0; + } +break; +case 53: +#line 621 "lua.stx" +{code_byte(POP); } +break; +case 54: +#line 622 "lua.stx" +{ + basepc[luaY_vsp[-2].vLong] = ONTJMP; + code_word_at(basepc+luaY_vsp[-2].vLong+1, pc - (luaY_vsp[-2].vLong + sizeof(Word)+1)); + luaY_val.vLong = 0; + } +break; +case 55: +#line 630 "lua.stx" +{ + code_byte(CREATEARRAY); + luaY_val.vLong = pc; code_word(0); + } +break; +case 56: +#line 635 "lua.stx" +{ + code_word_at(basepc+luaY_vsp[-3].vLong, luaY_vsp[-1].vInt); + } +break; +case 57: +#line 641 "lua.stx" +{ + code_byte(CALLFUNC); + code_byte(luaY_vsp[-1].vInt+luaY_vsp[0].vInt); + luaY_val.vLong = pc; + code_byte(0); /* may be modified by other rules */ + } +break; +case 58: +#line 649 "lua.stx" +{ luaY_val.vInt = 0; } +break; +case 59: +#line 651 "lua.stx" +{ + code_byte(PUSHSELF); + code_word(luaI_findconstant(luaY_vsp[0].pTStr)); + luaY_val.vInt = 1; + } +break; +case 60: +#line 659 "lua.stx" +{ luaY_val.vInt = adjust_functioncall(luaY_vsp[-1].vLong, 1); } +break; +case 61: +#line 660 "lua.stx" +{ luaY_val.vInt = 1; } +break; +case 62: +#line 663 "lua.stx" +{ luaY_val.vLong = 0; } +break; +case 63: +#line 664 "lua.stx" +{ luaY_val.vLong = luaY_vsp[0].vLong; } +break; +case 64: +#line 667 "lua.stx" +{ if (luaY_vsp[0].vLong != 0) luaY_val.vLong = luaY_vsp[0].vLong; else luaY_val.vLong = -1; } +break; +case 65: +#line 668 "lua.stx" +{ luaY_val.vLong = adjust_functioncall(luaY_vsp[-1].vLong, 1); } +break; +case 66: +#line 669 "lua.stx" +{ + if (luaY_vsp[0].vLong == 0) luaY_val.vLong = -(luaY_vsp[-1].vLong + 1); /* -length */ + else + { + adjust_functioncall(luaY_vsp[0].vLong, luaY_vsp[-1].vLong); + luaY_val.vLong = luaY_vsp[0].vLong; + } + } +break; +case 67: +#line 679 "lua.stx" +{ luaY_val.vInt = close_parlist(0); } +break; +case 68: +#line 680 "lua.stx" +{ luaY_val.vInt = close_parlist(luaY_vsp[0].vInt); } +break; +case 69: +#line 683 "lua.stx" +{ luaY_val.vInt = luaY_vsp[0].vInt; } +break; +case 70: +#line 685 "lua.stx" +{ + if (luaY_vsp[-2].vInt) + lua_error("invalid parameter list"); + luaY_val.vInt = luaY_vsp[0].vInt; + } +break; +case 71: +#line 692 "lua.stx" +{ add_localvar(luaY_vsp[0].pTStr); luaY_val.vInt = 0; } +break; +case 72: +#line 693 "lua.stx" +{ luaY_val.vInt = 1; } +break; +case 73: +#line 697 "lua.stx" +{ flush_list(luaY_vsp[0].vInt/FIELDS_PER_FLUSH, luaY_vsp[0].vInt%FIELDS_PER_FLUSH); } +break; +case 74: +#line 699 "lua.stx" +{ luaY_val.vInt = luaY_vsp[-2].vInt+luaY_vsp[0].vInt; } +break; +case 75: +#line 701 "lua.stx" +{ luaY_val.vInt = luaY_vsp[-1].vInt; flush_record(luaY_vsp[-1].vInt%FIELDS_PER_FLUSH); } +break; +case 76: +#line 705 "lua.stx" +{ luaY_val.vInt = 0; } +break; +case 77: +#line 707 "lua.stx" +{ luaY_val.vInt = luaY_vsp[0].vInt; flush_record(luaY_vsp[0].vInt%FIELDS_PER_FLUSH); } +break; +case 80: +#line 714 "lua.stx" +{ luaY_val.vInt = 0; } +break; +case 81: +#line 715 "lua.stx" +{ luaY_val.vInt = luaY_vsp[-1].vInt; } +break; +case 82: +#line 718 "lua.stx" +{luaY_val.vInt=1;} +break; +case 83: +#line 720 "lua.stx" +{ + luaY_val.vInt=luaY_vsp[-2].vInt+1; + if (luaY_val.vInt%FIELDS_PER_FLUSH == 0) flush_record(FIELDS_PER_FLUSH); + } +break; +case 84: +#line 727 "lua.stx" +{ + push_field(luaI_findconstant(luaY_vsp[-2].pTStr)); + } +break; +case 85: +#line 732 "lua.stx" +{ luaY_val.vInt = 0; } +break; +case 86: +#line 733 "lua.stx" +{ luaY_val.vInt = luaY_vsp[-1].vInt; } +break; +case 87: +#line 736 "lua.stx" +{luaY_val.vInt=1;} +break; +case 88: +#line 738 "lua.stx" +{ + luaY_val.vInt=luaY_vsp[-2].vInt+1; + if (luaY_val.vInt%FIELDS_PER_FLUSH == 0) + flush_list(luaY_val.vInt/FIELDS_PER_FLUSH - 1, FIELDS_PER_FLUSH); + } +break; +case 89: +#line 746 "lua.stx" +{ + nvarbuffer = 0; + add_varbuffer(luaY_vsp[0].vLong); + luaY_val.vInt = (luaY_vsp[0].vLong == 0) ? 1 : 0; + } +break; +case 90: +#line 752 "lua.stx" +{ + add_varbuffer(luaY_vsp[0].vLong); + luaY_val.vInt = (luaY_vsp[0].vLong == 0) ? luaY_vsp[-2].vInt + 1 : luaY_vsp[-2].vInt; + } +break; +case 91: +#line 758 "lua.stx" +{ luaY_val.vLong = luaY_vsp[0].vLong; } +break; +case 92: +#line 760 "lua.stx" +{ + luaY_val.vLong = 0; /* indexed variable */ + } +break; +case 93: +#line 764 "lua.stx" +{ + code_byte(PUSHSTRING); + code_word(luaI_findconstant(luaY_vsp[0].pTStr)); + luaY_val.vLong = 0; /* indexed variable */ + } +break; +case 94: +#line 772 "lua.stx" +{ + int local = lua_localname(luaY_vsp[0].pTStr); + if (local == -1) /* global var */ + luaY_val.vLong = luaI_findsymbol(luaY_vsp[0].pTStr)+1; /* return positive value */ + else + luaY_val.vLong = -(local+1); /* return negative value */ + } +break; +case 95: +#line 781 "lua.stx" +{ lua_pushvar(luaY_vsp[0].vLong); } +break; +case 96: +#line 784 "lua.stx" +{store_localvar(luaY_vsp[0].pTStr, 0); luaY_val.vInt = 1;} +break; +case 97: +#line 786 "lua.stx" +{ + store_localvar(luaY_vsp[0].pTStr, luaY_vsp[-2].vInt); + luaY_val.vInt = luaY_vsp[-2].vInt+1; + } +break; +case 98: +#line 792 "lua.stx" +{ luaY_val.vInt = 0; } +break; +case 99: +#line 793 "lua.stx" +{ luaY_val.vInt = luaY_vsp[0].vLong; } +break; +#line 1613 "y.tab.c" + } + luaY_ssp -= luaY_m; + luaY_state = *luaY_ssp; + luaY_vsp -= luaY_m; + luaY_m = luaY_lhs[luaY_n]; + if (luaY_state == 0 && luaY_m == 0) + { +#if YYDEBUG + if (luaY_debug) + printf("%sdebug: after reduction, shifting from state 0 to\ + state %d\n", YYPREFIX, YYFINAL); +#endif + luaY_state = YYFINAL; + *++luaY_ssp = YYFINAL; + *++luaY_vsp = luaY_val; + if (luaY_char < 0) + { + if ((luaY_char = luaY_lex()) < 0) luaY_char = 0; +#if YYDEBUG + if (luaY_debug) + { + luaY_s = 0; + if (luaY_char <= YYMAXTOKEN) luaY_s = luaY_name[luaY_char]; + if (!luaY_s) luaY_s = "illegal-symbol"; + printf("%sdebug: state %d, reading %d (%s)\n", + YYPREFIX, YYFINAL, luaY_char, luaY_s); + } +#endif + } + if (luaY_char == 0) goto luaY_accept; + goto luaY_loop; + } + if ((luaY_n = luaY_gindex[luaY_m]) && (luaY_n += luaY_state) >= 0 && + luaY_n <= YYTABLESIZE && luaY_check[luaY_n] == luaY_state) + luaY_state = luaY_table[luaY_n]; + else + luaY_state = luaY_dgoto[luaY_m]; +#if YYDEBUG + if (luaY_debug) + printf("%sdebug: after reduction, shifting from state %d \ +to state %d\n", YYPREFIX, *luaY_ssp, luaY_state); +#endif + if (luaY_ssp >= luaY_ss + luaY_stacksize - 1) + { + goto luaY_overflow; + } + *++luaY_ssp = luaY_state; + *++luaY_vsp = luaY_val; + goto luaY_loop; +luaY_overflow: + luaY_error("yacc stack overflow"); +luaY_abort: + return (1); +luaY_accept: + return (0); +} diff --git a/lib/lua/src/parser.h b/lib/lua/src/parser.h new file mode 100644 index 0000000..7087ef9 --- /dev/null +++ b/lib/lua/src/parser.h @@ -0,0 +1,38 @@ +#define WRONGTOKEN 257 +#define NIL 258 +#define IF 259 +#define THEN 260 +#define ELSE 261 +#define ELSEIF 262 +#define WHILE 263 +#define DO 264 +#define REPEAT 265 +#define UNTIL 266 +#define END 267 +#define RETURN 268 +#define LOCAL 269 +#define FUNCTION 270 +#define DOTS 271 +#define NUMBER 272 +#define STRING 273 +#define NAME 274 +#define AND 275 +#define OR 276 +#define EQ 277 +#define NE 278 +#define LE 279 +#define GE 280 +#define CONC 281 +#define UNARY 282 +#define NOT 283 +typedef union +{ + int vInt; + float vFloat; + char *pChar; + Word vWord; + Long vLong; + TFunc *pFunc; + TaggedString *pTStr; +} YYSTYPE; +extern YYSTYPE luaY_lval; diff --git a/lib/lua/src/table.c b/lib/lua/src/table.c new file mode 100644 index 0000000..b2e60a3 --- /dev/null +++ b/lib/lua/src/table.c @@ -0,0 +1,278 @@ +/* +** table.c +** Module to control static tables +*/ + +char *rcs_table="$Id: table.c,v 2.58 1996/11/01 12:47:45 roberto Exp $"; + +#include "mem.h" +#include "opcode.h" +#include "tree.h" +#include "hash.h" +#include "table.h" +#include "inout.h" +#include "lua.h" +#include "fallback.h" +#include "luadebug.h" + + +#define BUFFER_BLOCK 256 + +Symbol *lua_table = NULL; +Word lua_ntable = 0; +static Long lua_maxsymbol = 0; + +TaggedString **lua_constant = NULL; +Word lua_nconstant = 0; +static Long lua_maxconstant = 0; + + +#define GARBAGE_BLOCK 50 + +static void lua_nextvar (void); + +/* +** Internal functions +*/ +static struct { + char *name; + lua_CFunction func; +} int_funcs[] = { + {"assert", luaI_assert}, + {"call", luaI_call}, + {"dofile", lua_internaldofile}, + {"dostring", lua_internaldostring}, + {"error", luaI_error}, + {"getglobal", luaI_getglobal}, + {"next", lua_next}, + {"nextvar", lua_nextvar}, + {"print", luaI_print}, + {"setfallback", luaI_setfallback}, + {"setglobal", luaI_setglobal}, + {"tonumber", lua_obj2number}, + {"tostring", luaI_tostring}, + {"type", luaI_type} +}; + +#define INTFUNCSIZE (sizeof(int_funcs)/sizeof(int_funcs[0])) + + +void luaI_initsymbol (void) +{ + int i; + Word n; + lua_maxsymbol = BUFFER_BLOCK; + lua_table = newvector(lua_maxsymbol, Symbol); + for (i=0; ivarindex == NOT_USED) + { + if (lua_ntable == lua_maxsymbol) + lua_maxsymbol = growvector(&lua_table, lua_maxsymbol, Symbol, + symbolEM, MAX_WORD); + t->varindex = lua_ntable; + lua_table[lua_ntable].varname = t; + s_tag(lua_ntable) = LUA_T_NIL; + lua_ntable++; + } + return t->varindex; +} + + +Word luaI_findsymbolbyname (char *name) +{ + return luaI_findsymbol(luaI_createfixedstring(name)); +} + + +/* +** Given a tree node, check it is has a correspondent constant index. If not, +** allocate it. +*/ +Word luaI_findconstant (TaggedString *t) +{ + if (t->constindex == NOT_USED) + { + if (lua_nconstant == lua_maxconstant) + lua_maxconstant = growvector(&lua_constant, lua_maxconstant, TaggedString *, + constantEM, MAX_WORD); + t->constindex = lua_nconstant; + lua_constant[lua_nconstant] = t; + lua_nconstant++; + } + return t->constindex; +} + + +Word luaI_findconstantbyname (char *name) +{ + return luaI_findconstant(luaI_createfixedstring(name)); +} + +TaggedString *luaI_createfixedstring (char *name) +{ + TaggedString *ts = lua_createstring(name); + if (!ts->marked) + ts->marked = 2; /* avoid GC */ + return ts; +} + + +/* +** Traverse symbol table objects +*/ +static char *lua_travsymbol (int (*fn)(Object *)) +{ + Word i; + for (i=0; istr; + return NULL; +} + + +/* +** Mark an object if it is a string or a unmarked array. +*/ +int lua_markobject (Object *o) +{/* if already marked, does not change mark value */ + if (tag(o) == LUA_T_STRING && !tsvalue(o)->marked) + tsvalue(o)->marked = 1; + else if (tag(o) == LUA_T_ARRAY) + lua_hashmark (avalue(o)); + else if ((o->tag == LUA_T_FUNCTION || o->tag == LUA_T_MARK) + && !o->value.tf->marked) + o->value.tf->marked = 1; + return 0; +} + +/* +* returns 0 if the object is going to be (garbage) collected +*/ +int luaI_ismarked (Object *o) +{ + switch (o->tag) + { + case LUA_T_STRING: + return o->value.ts->marked; + case LUA_T_FUNCTION: + return o->value.tf->marked; + case LUA_T_ARRAY: + return o->value.a->mark; + default: /* nil, number, cfunction, or user data */ + return 1; + } +} + + +/* +** Garbage collection. +** Delete all unused strings and arrays. +*/ +Long luaI_collectgarbage (void) +{ + Long recovered = 0; + lua_travstack(lua_markobject); /* mark stack objects */ + lua_travsymbol(lua_markobject); /* mark symbol table objects */ + luaI_travlock(lua_markobject); /* mark locked objects */ + luaI_travfallbacks(lua_markobject); /* mark fallbacks */ + luaI_invalidaterefs(); + recovered += lua_strcollector(); + recovered += lua_hashcollector(); + recovered += luaI_funccollector(); + return recovered; +} + +void lua_pack (void) +{ + static unsigned long block = GARBAGE_BLOCK; + static unsigned long nentity = 0; /* total of strings, arrays, etc */ + unsigned long recovered = 0; + if (nentity++ < block) return; + recovered = luaI_collectgarbage(); + block = 2*(block-recovered); + nentity -= recovered; +} + + +/* +** Internal function: return next global variable +*/ +static void lua_nextvar (void) +{ + Word next; + lua_Object o = lua_getparam(1); + if (o == LUA_NOOBJECT) + lua_error("too few arguments to function `nextvar'"); + if (lua_getparam(2) != LUA_NOOBJECT) + lua_error("too many arguments to function `nextvar'"); + if (lua_isnil(o)) + next = 0; + else if (!lua_isstring(o)) + { + lua_error("incorrect argument to function `nextvar'"); + return; /* to avoid warnings */ + } + else + next = luaI_findsymbolbyname(lua_getstring(o)) + 1; + while (next < lua_ntable && s_tag(next) == LUA_T_NIL) next++; + if (next < lua_ntable) + { + lua_pushstring(lua_table[next].varname->str); + luaI_pushobject(&s_object(next)); + } +} + + +static Object *functofind; +static int checkfunc (Object *o) +{ + if (o->tag == LUA_T_FUNCTION) + return + ((functofind->tag == LUA_T_FUNCTION || functofind->tag == LUA_T_MARK) + && (functofind->value.tf == o->value.tf)); + if (o->tag == LUA_T_CFUNCTION) + return + ((functofind->tag == LUA_T_CFUNCTION || functofind->tag == LUA_T_CMARK) + && (functofind->value.f == o->value.f)); + return 0; +} + + +char *lua_getobjname (lua_Object o, char **name) +{ /* try to find a name for given function */ + functofind = luaI_Address(o); + if ((*name = luaI_travfallbacks(checkfunc)) != NULL) + return "fallback"; + else if ((*name = lua_travsymbol(checkfunc)) != NULL) + return "global"; + else return ""; +} + diff --git a/lib/lua/src/table.h b/lib/lua/src/table.h new file mode 100644 index 0000000..d7003c9 --- /dev/null +++ b/lib/lua/src/table.h @@ -0,0 +1,38 @@ +/* +** Module to control static tables +** TeCGraf - PUC-Rio +** $Id: table.h,v 2.21 1996/04/22 18:00:37 roberto Exp $ +*/ + +#ifndef table_h +#define table_h + +#include "tree.h" +#include "opcode.h" + +typedef struct +{ + Object object; + TaggedString *varname; +} Symbol; + + +extern Symbol *lua_table; +extern Word lua_ntable; +extern TaggedString **lua_constant; +extern Word lua_nconstant; + +void luaI_initsymbol (void); +void luaI_initconstant (void); +Word luaI_findsymbolbyname (char *name); +Word luaI_findsymbol (TaggedString *t); +Word luaI_findconstant (TaggedString *t); +Word luaI_findconstantbyname (char *name); +TaggedString *luaI_createfixedstring (char *str); +int lua_markobject (Object *o); +int luaI_ismarked (Object *o); +Long luaI_collectgarbage (void); +void lua_pack (void); + + +#endif diff --git a/lib/lua/src/tree.c b/lib/lua/src/tree.c new file mode 100644 index 0000000..8fbe420 --- /dev/null +++ b/lib/lua/src/tree.c @@ -0,0 +1,145 @@ +/* +** tree.c +** TecCGraf - PUC-Rio +*/ + +char *rcs_tree="$Id: tree.c,v 1.20 1996/03/14 15:56:26 roberto Exp $"; + + +#include + +#include "mem.h" +#include "lua.h" +#include "tree.h" +#include "lex.h" +#include "hash.h" +#include "table.h" + + +#define NUM_HASHS 64 + +typedef struct { + int size; + int nuse; /* number of elements (including EMPTYs) */ + TaggedString **hash; +} stringtable; + +static int initialized = 0; + +static stringtable string_root[NUM_HASHS]; + +static TaggedString EMPTY = {NOT_USED, NOT_USED, 0, 2, {0}}; + + +static unsigned long hash (char *str) +{ + unsigned long h = 0; + while (*str) + h = ((h<<5)-h)^(unsigned char)*(str++); + return h; +} + +static void initialize (void) +{ + initialized = 1; + luaI_addReserved(); + luaI_initsymbol(); + luaI_initconstant(); +} + + +static void grow (stringtable *tb) +{ + int newsize = luaI_redimension(tb->size); + TaggedString **newhash = newvector(newsize, TaggedString *); + int i; + for (i=0; inuse = 0; + for (i=0; isize; i++) + if (tb->hash[i] != NULL && tb->hash[i] != &EMPTY) + { + int h = tb->hash[i]->hash%newsize; + while (newhash[h]) + h = (h+1)%newsize; + newhash[h] = tb->hash[i]; + tb->nuse++; + } + luaI_free(tb->hash); + tb->size = newsize; + tb->hash = newhash; +} + +static TaggedString *insert (char *str, stringtable *tb) +{ + TaggedString *ts; + unsigned long h = hash(str); + int i; + int j = -1; + if ((Long)tb->nuse*3 >= (Long)tb->size*2) + { + if (!initialized) + initialize(); + grow(tb); + } + i = h%tb->size; + while (tb->hash[i]) + { + if (tb->hash[i] == &EMPTY) + j = i; + else if (strcmp(str, tb->hash[i]->str) == 0) + return tb->hash[i]; + i = (i+1)%tb->size; + } + /* not found */ + lua_pack(); + if (j != -1) /* is there an EMPTY space? */ + i = j; + else + tb->nuse++; + ts = tb->hash[i] = (TaggedString *)luaI_malloc(sizeof(TaggedString)+strlen(str)); + strcpy(ts->str, str); + ts->marked = 0; + ts->hash = h; + ts->varindex = ts->constindex = NOT_USED; + return ts; +} + +TaggedString *lua_createstring (char *str) +{ + return insert(str, &string_root[(unsigned)str[0]%NUM_HASHS]); +} + + +/* +** Garbage collection function. +** This function traverse the string list freeing unindexed strings +*/ +Long lua_strcollector (void) +{ + Long counter = 0; + int i; + for (i=0; isize; j++) + { + TaggedString *t = tb->hash[j]; + if (t != NULL && t->marked <= 1) + { + if (t->marked) + t->marked = 0; + else + { + luaI_free(t); + tb->hash[j] = &EMPTY; + counter++; + } + } + } + } + return counter; +} + diff --git a/lib/lua/src/tree.h b/lib/lua/src/tree.h new file mode 100644 index 0000000..f3af0a0 --- /dev/null +++ b/lib/lua/src/tree.h @@ -0,0 +1,28 @@ +/* +** tree.h +** TecCGraf - PUC-Rio +** $Id: tree.h,v 1.14 1996/02/26 17:07:49 roberto Exp $ +*/ + +#ifndef tree_h +#define tree_h + +#include "types.h" + +#define NOT_USED 0xFFFE + + +typedef struct TaggedString +{ + Word varindex; /* != NOT_USED if this is a symbol */ + Word constindex; /* != NOT_USED if this is a constant */ + unsigned long hash; /* 0 if not initialized */ + int marked; /* for garbage collection; never collect (nor change) if > 1 */ + char str[1]; /* \0 byte already reserved */ +} TaggedString; + + +TaggedString *lua_createstring (char *str); +Long lua_strcollector (void); + +#endif diff --git a/lib/lua/src/types.h b/lib/lua/src/types.h new file mode 100644 index 0000000..748ed83 --- /dev/null +++ b/lib/lua/src/types.h @@ -0,0 +1,29 @@ +/* +** TeCGraf - PUC-Rio +** $Id: types.h,v 1.4 1996/02/07 14:13:17 roberto Exp $ +*/ + +#ifndef types_h +#define types_h + +#include + +#ifndef real +#define real float +#endif + +#define Byte lua_Byte /* some systems have Byte as a predefined type */ +typedef unsigned char Byte; /* unsigned 8 bits */ + +#define Word lua_Word /* some systems have Word as a predefined type */ +typedef unsigned short Word; /* unsigned 16 bits */ + +#define MAX_WORD (USHRT_MAX-2) /* maximum value of a word (-2 for safety) */ +#define MAX_INT (INT_MAX-2) /* maximum value of a int (-2 for safety) */ + +#define Long lua_Long /* some systems have Long as a predefined type */ +typedef signed long Long; /* 32 bits */ + +typedef unsigned int IntPoint; /* unsigned with same size as a pointer (for hashing) */ + +#endif diff --git a/lib/lua/src/undump.c b/lib/lua/src/undump.c new file mode 100644 index 0000000..2e6ee07 --- /dev/null +++ b/lib/lua/src/undump.c @@ -0,0 +1,333 @@ +/* +** undump.c +** load bytecodes from files +*/ + +char* rcs_undump="$Id: undump.c,v 1.21 1996/11/18 11:18:29 lhf Exp $"; + +#include +#include +#include "opcode.h" +#include "mem.h" +#include "table.h" +#include "undump.h" + +static int swapword=0; +static int swapfloat=0; +static TFunc* Main=NULL; /* functions in a chunk */ +static TFunc* lastF=NULL; + +static void warn(char* s) /* TODO: remove */ +{ +#if 0 + fprintf(stderr,"undump: %s\n",s); +#endif +} + +static void FixCode(Byte* code, Byte* end) /* swap words */ +{ + Byte* p; + for (p=code; p!=end;) + { + OpCode op=(OpCode)*p; + switch (op) + { + case PUSHNIL: + case PUSH0: + case PUSH1: + case PUSH2: + case PUSHLOCAL0: + case PUSHLOCAL1: + case PUSHLOCAL2: + case PUSHLOCAL3: + case PUSHLOCAL4: + case PUSHLOCAL5: + case PUSHLOCAL6: + case PUSHLOCAL7: + case PUSHLOCAL8: + case PUSHLOCAL9: + case PUSHINDEXED: + case STORELOCAL0: + case STORELOCAL1: + case STORELOCAL2: + case STORELOCAL3: + case STORELOCAL4: + case STORELOCAL5: + case STORELOCAL6: + case STORELOCAL7: + case STORELOCAL8: + case STORELOCAL9: + case STOREINDEXED0: + case ADJUST0: + case EQOP: + case LTOP: + case LEOP: + case GTOP: + case GEOP: + case ADDOP: + case SUBOP: + case MULTOP: + case DIVOP: + case POWOP: + case CONCOP: + case MINUSOP: + case NOTOP: + case POP: + case RETCODE0: + p++; + break; + case PUSHBYTE: + case PUSHLOCAL: + case STORELOCAL: + case STOREINDEXED: + case STORELIST0: + case ADJUST: + case RETCODE: + p+=2; + break; + case STORELIST: + case CALLFUNC: + p+=3; + break; + case PUSHFUNCTION: + p+=5; /* TODO: use sizeof(TFunc*) or old? */ + break; + case PUSHWORD: + case PUSHSELF: + case CREATEARRAY: + case ONTJMP: + case ONFJMP: + case JMP: + case UPJMP: + case IFFJMP: + case IFFUPJMP: + case SETLINE: + case PUSHSTRING: + case PUSHGLOBAL: + case STOREGLOBAL: + { + Byte t; + t=p[1]; p[1]=p[2]; p[2]=t; + p+=3; + break; + } + case PUSHFLOAT: /* assumes sizeof(float)==4 */ + { + Byte t; + t=p[1]; p[1]=p[4]; p[4]=t; + t=p[2]; p[2]=p[3]; p[3]=t; + p+=5; + break; + } + case STORERECORD: + { + int n=*++p; + p++; + while (n--) + { + Byte t; + t=p[0]; p[0]=p[1]; p[1]=t; + p+=2; + } + break; + } + default: + lua_error("corrupt binary file"); + break; + } + } +} + +static void Unthread(Byte* code, int i, int v) +{ + while (i!=0) + { + Word w; + Byte* p=code+i; + memcpy(&w,p,sizeof(w)); + i=w; w=v; + memcpy(p,&w,sizeof(w)); + } +} + +static int LoadWord(FILE* D) +{ + Word w; + fread(&w,sizeof(w),1,D); + if (swapword) + { + Byte* p=(Byte*)&w; /* TODO: need union? */ + Byte t; + t=p[0]; p[0]=p[1]; p[1]=t; + } + return w; +} + +static int LoadSize(FILE* D) +{ + Word hi=LoadWord(D); + Word lo=LoadWord(D); + int s=(hi<<16)|lo; + if ((Word)s != s) lua_error("code too long"); + return s; +} + +static void* LoadBlock(int size, FILE* D) +{ + void* b=luaI_malloc(size); + fread(b,size,1,D); + return b; +} + +static char* LoadString(FILE* D) +{ + int size=LoadWord(D); + char *b=luaI_buffer(size); + fread(b,size,1,D); + return b; +} + +static char* LoadNewString(FILE* D) +{ + return LoadBlock(LoadWord(D),D); +} + +static void LoadFunction(FILE* D) +{ + TFunc* tf=new(TFunc); + tf->next=NULL; + tf->locvars=NULL; + tf->size=LoadSize(D); + tf->lineDefined=LoadWord(D); + if (IsMain(tf)) /* new main */ + { + tf->fileName=LoadNewString(D); + Main=lastF=tf; + } + else /* fix PUSHFUNCTION */ + { + tf->marked=LoadWord(D); + tf->fileName=Main->fileName; + memcpy(Main->code+tf->marked,&tf,sizeof(tf)); + lastF=lastF->next=tf; + } + tf->code=LoadBlock(tf->size,D); + if (swapword || swapfloat) FixCode(tf->code,tf->code+tf->size); + while (1) /* unthread */ + { + int c=getc(D); + if (c==ID_VAR) /* global var */ + { + int i=LoadWord(D); + char* s=LoadString(D); + int v=luaI_findsymbolbyname(s); + Unthread(tf->code,i,v); + } + else if (c==ID_STR) /* constant string */ + { + int i=LoadWord(D); + char* s=LoadString(D); + int v=luaI_findconstantbyname(s); + Unthread(tf->code,i,v); + } + else + { + ungetc(c,D); + break; + } + } +} + +static void LoadSignature(FILE* D) +{ + char* s=SIGNATURE; + while (*s!=0 && getc(D)==*s) + ++s; + if (*s!=0) lua_error("bad signature"); +} + +static void LoadHeader(FILE* D) /* TODO: error handling */ +{ + Word w,tw=TEST_WORD; + float f,tf=TEST_FLOAT; + int version; + LoadSignature(D); + version=getc(D); + if (version>0x23) /* after 2.5 */ + { + int oldsizeofW=getc(D); + int oldsizeofF=getc(D); + int oldsizeofP=getc(D); + if (oldsizeofW!=2) + lua_error("cannot load binary file created on machine with sizeof(Word)!=2"); + if (oldsizeofF!=4) + lua_error("cannot load binary file created on machine with sizeof(float)!=4. not an IEEE machine?"); + if (oldsizeofP!=sizeof(TFunc*)) /* TODO: pack */ + lua_error("cannot load binary file: different pointer sizes"); + } + fread(&w,sizeof(w),1,D); /* test word */ + if (w!=tw) + { + swapword=1; + warn("different byte order"); + } + fread(&f,sizeof(f),1,D); /* test float */ + if (f!=tf) + { + Byte* p=(Byte*)&f; /* TODO: need union? */ + Byte t; + swapfloat=1; + t=p[0]; p[0]=p[3]; p[3]=t; + t=p[1]; p[1]=p[2]; p[2]=t; + if (f!=tf) /* TODO: try another perm? */ + lua_error("different float representation"); + else + warn("different byte order in floats"); + } +} + +static void LoadChunk(FILE* D) +{ + LoadHeader(D); + while (1) + { + int c=getc(D); + if (c==ID_FUN) LoadFunction(D); else { ungetc(c,D); break; } + } +} + +/* +** load one chunk from a file. +** return list of functions found, headed by main, or NULL at EOF. +*/ +TFunc* luaI_undump1(FILE* D) +{ + while (1) + { + int c=getc(D); + if (c==ID_CHUNK) + { + LoadChunk(D); + return Main; + } + else if (c==EOF) + return NULL; + else + lua_error("not a lua binary file"); + } +} + +/* +** load and run all chunks in a file +*/ +int luaI_undump(FILE* D) +{ + TFunc* m; + while ((m=luaI_undump1(D))) + { + int status=luaI_dorun(m); + luaI_freefunc(m); + if (status!=0) return status; + } + return 0; +} diff --git a/lib/lua/src/undump.h b/lib/lua/src/undump.h new file mode 100644 index 0000000..8d757e3 --- /dev/null +++ b/lib/lua/src/undump.h @@ -0,0 +1,23 @@ +/* +** undump.h +** definitions for lua decompiler +** $Id: undump.h,v 1.3 1996/11/14 11:44:34 lhf Exp $ +*/ + +#include "func.h" + +#define IsMain(f) (f->lineDefined==0) + +/* definitions for chunk headers */ + +#define ID_CHUNK 27 /* ESC */ +#define ID_FUN 'F' +#define ID_VAR 'V' +#define ID_STR 'S' +#define SIGNATURE "Lua" +#define VERSION 0x25 /* 2.5 */ +#define TEST_WORD 0x1234 /* a word for testing byte ordering */ +#define TEST_FLOAT 0.123456789e-23 /* a float for testing representation */ + +TFunc* luaI_undump1(FILE* D); /* load one chunk */ +int luaI_undump(FILE* D); /* load all chunks */