October 2026 main drop: mirror from GitHub

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/*
** $Id: lauxlib.h $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/


#ifndef lauxlib_h
#define lauxlib_h


#include <stddef.h>
#include <stdio.h>

#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);


/* 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 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 */
#define luaL_pushfail(L)	lua_pushnil(L)


/*
** Internal assertions for in-house debugging
*/
#if !defined(lua_assert)

#if defined LUAI_ASSERT
  #include <assert.h>
  #define lua_assert(c)		assert(c)
#else
  #define lua_assert(c)		((void)0)
#endif

#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;

/* }====================================================== */

/*
** {==================================================================
** "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

/* }================================================================== */


/*
** {============================================================
** 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

	/*
	** $Id: lauxlib.h $
	** Auxiliary functions for building Lua libraries
	** See Copyright Notice in lua.h
	*/


	#ifndef lauxlib_h
	#define lauxlib_h


	#include <stddef.h>
	#include <stdio.h>

	#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);


	/* 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 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 */
	#define luaL_pushfail(L) lua_pushnil(L)


	/*
	** Internal assertions for in-house debugging
	*/
	#if !defined(lua_assert)

	#if defined LUAI_ASSERT
	#include <assert.h>
	#define lua_assert(c) assert(c)
	#else
	#define lua_assert(c) ((void)0)
	#endif

	#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;

	/* }====================================================== */

	/*
	** {==================================================================
	** "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

	/* }================================================================== */


	/*
	** {============================================================
	** 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