vendor: 引入 Lua 2.5 官方源码 + 移植评估 (lua_2.5 分支)

- 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

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
+