mirror of
https://gitcode.com/JianFeeeee/LuaCangjia_api.git
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c23f8c5e32
- lib/lua 替换为 Lua 5.1.5 官方源码; CMakeLists 删除 5.1 不存在的 lcorolib.c/lctype.c/lutf8lib.c/lbitlib.c - 补充 lua.hpp C++ 包装头(5.1 官方不提供, 保持桥接 include 路径不变) - LUA_OK 兼容宏: 5.1 无此定义(成功返回值为 0) - luaL_tolstring 兼容: 5.1 无此 API, l_print 改用 lua_tostring + lua_typename 兜底(#if LUA_VERSION_NUM >= 502 条件编译, 弹栈逻辑同步分支) - luaL_setfuncs 兼容: 5.1 无此 API, push_tty_file 改手动循环注册 - I/O 重定向沿用 Registry 方案(自 5.2.4 分支同步), typed interop 版本自适应断言同步 - 验证: GTest 44/44 通过
83 lines
1.6 KiB
C
83 lines
1.6 KiB
C
/*
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** $Id: lzio.c,v 1.31.1.1 2007/12/27 13:02:25 roberto Exp $
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** a generic input stream interface
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** See Copyright Notice in lua.h
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*/
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#include <string.h>
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#define lzio_c
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#define LUA_CORE
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#include "lua.h"
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#include "llimits.h"
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#include "lmem.h"
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#include "lstate.h"
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#include "lzio.h"
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int luaZ_fill (ZIO *z) {
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size_t size;
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lua_State *L = z->L;
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const char *buff;
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lua_unlock(L);
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buff = z->reader(L, z->data, &size);
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lua_lock(L);
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if (buff == NULL || size == 0) return EOZ;
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z->n = size - 1;
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z->p = buff;
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return char2int(*(z->p++));
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}
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int luaZ_lookahead (ZIO *z) {
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if (z->n == 0) {
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if (luaZ_fill(z) == EOZ)
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return EOZ;
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else {
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z->n++; /* luaZ_fill removed first byte; put back it */
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z->p--;
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}
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}
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return char2int(*z->p);
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}
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void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, void *data) {
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z->L = L;
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z->reader = reader;
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z->data = data;
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z->n = 0;
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z->p = NULL;
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}
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/* --------------------------------------------------------------- read --- */
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size_t luaZ_read (ZIO *z, void *b, size_t n) {
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while (n) {
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size_t m;
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if (luaZ_lookahead(z) == EOZ)
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return n; /* return number of missing bytes */
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m = (n <= z->n) ? n : z->n; /* min. between n and z->n */
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memcpy(b, z->p, m);
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z->n -= m;
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z->p += m;
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b = (char *)b + m;
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n -= m;
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}
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return 0;
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}
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/* ------------------------------------------------------------------------ */
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char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) {
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if (n > buff->buffsize) {
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if (n < LUA_MINBUFFER) n = LUA_MINBUFFER;
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luaZ_resizebuffer(L, buff, n);
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}
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return buff->buffer;
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}
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