lua.h - external/github.com/lua/lua - Git at Google

 /*
 ** $Id: lua.h,v 1.153 2002/08/06 18:54:18 roberto Exp roberto $
 ** Lua - An Extensible Extension Language
 ** Tecgraf: Computer Graphics Technology Group, PUC-Rio, Brazil
 ** http://www.lua.org	mailto:info@lua.org
 ** See Copyright Notice at the end of this file
 */


 #ifndef lua_h
 #define lua_h


 /* definition of `va_list' */
 #include <stdarg.h>

 /* definition of `size_t' */
 #include <stddef.h>


 #define LUA_VERSION	"Lua 5.0 (alpha)"
 #define LUA_COPYRIGHT	"Copyright (C) 1994-2002 Tecgraf, PUC-Rio"
 #define LUA_AUTHORS 	"W. Celes, R. Ierusalimschy & L. H. de Figueiredo"


 /* option for multiple returns in `lua_pcall' and `lua_call' */
 #define LUA_MULTRET	(-1)


 /*
 ** pseudo-indices
 */
 #define LUA_REGISTRYINDEX	(-10000)
 #define LUA_GLOBALSINDEX	(-10001)
 #define lua_upvalueindex(i)	(LUA_GLOBALSINDEX-(i))


 /* error codes for `lua_load' and `lua_pcall' */
 #define LUA_ERRRUN	1
 #define LUA_ERRFILE	2
 #define LUA_ERRSYNTAX	3
 #define LUA_ERRMEM	4
 #define LUA_ERRERR	5
 #define LUA_ERRTHROW	6


 typedef struct lua_State lua_State;

 typedef int (*lua_CFunction) (lua_State *L);


 /*
 ** functions that read blocks when loading Lua chunk
 */
 typedef const char * (*lua_Chunkreader) (lua_State *L, void *ud, size_t *size);


 /*
 ** basic types
 */
 #define LUA_TNONE	(-1)

 #define LUA_TNIL	0
 #define LUA_TNUMBER	1
 #define LUA_TSTRING	2
 #define LUA_TBOOLEAN	3
 #define LUA_TTABLE	4
 #define LUA_TFUNCTION	5
 #define LUA_TUSERDATA	6
 #define LUA_TLIGHTUSERDATA	7


 /* minimum Lua stack available to a C function */
 #define LUA_MINSTACK	20


 /*
 ** generic extra include file
 */
 #ifdef LUA_USER_H
 #include LUA_USER_H
 #endif


 /* type of Numbers in Lua */
 #ifndef LUA_NUMBER
 #define LUA_NUMBER	double
 #endif
 typedef LUA_NUMBER lua_Number;


 /* mark for all API functions */
 #ifndef LUA_API
 #define LUA_API		extern
 #endif


 /*
 ** state manipulation
 */
 LUA_API lua_State *lua_open (void);
 LUA_API void       lua_close (lua_State *L);
 LUA_API lua_State *lua_newthread (lua_State *L);
 LUA_API void       lua_closethread (lua_State *L, lua_State *thread);

 LUA_API lua_CFunction lua_atpanic (lua_State *L, lua_CFunction panicf);


 /*
 ** basic stack manipulation
 */
 LUA_API int   lua_gettop (lua_State *L);
 LUA_API void  lua_settop (lua_State *L, int index);
 LUA_API void  lua_pushvalue (lua_State *L, int index);
 LUA_API void  lua_remove (lua_State *L, int index);
 LUA_API void  lua_insert (lua_State *L, int index);
 LUA_API void  lua_replace (lua_State *L, int index);
 LUA_API int   lua_checkstack (lua_State *L, int size);


 /*
 ** access functions (stack -> C)
 */

 LUA_API int             lua_isnumber (lua_State *L, int index);
 LUA_API int             lua_isstring (lua_State *L, int index);
 LUA_API int             lua_iscfunction (lua_State *L, int index);
 LUA_API int             lua_type (lua_State *L, int index);
 LUA_API const char     *lua_typename (lua_State *L, int type);

 LUA_API int            lua_equal (lua_State *L, int index1, int index2);
 LUA_API int            lua_rawequal (lua_State *L, int index1, int index2);
 LUA_API int            lua_lessthan (lua_State *L, int index1, int index2);

 LUA_API lua_Number      lua_tonumber (lua_State *L, int index);
 LUA_API int             lua_toboolean (lua_State *L, int index);
 LUA_API const char     *lua_tostring (lua_State *L, int index);
 LUA_API size_t          lua_strlen (lua_State *L, int index);
 LUA_API lua_CFunction   lua_tocfunction (lua_State *L, int index);
 LUA_API void	       *lua_touserdata (lua_State *L, int index);
 LUA_API const void     *lua_topointer (lua_State *L, int index);


 /*
 ** 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_pushlstring (lua_State *L, const char *s, size_t len);
 LUA_API void  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);


 /*
 ** get functions (Lua -> stack)
 */
 LUA_API void  lua_gettable (lua_State *L, int index);
 LUA_API void  lua_rawget (lua_State *L, int index);
 LUA_API void  lua_rawgeti (lua_State *L, int index, int n);
 LUA_API void  lua_newtable (lua_State *L);
 LUA_API int   lua_getmetatable (lua_State *L, int objindex);
 LUA_API const char *lua_getmode (lua_State *L, int index);
 LUA_API void  lua_getglobals (lua_State *L, int index);


 /*
 ** set functions (stack -> Lua)
 */
 LUA_API void  lua_settable (lua_State *L, int index);
 LUA_API void  lua_rawset (lua_State *L, int index);
 LUA_API void  lua_rawseti (lua_State *L, int index, int n);
 LUA_API void  lua_setmode (lua_State *L, int index, const char *mode);
 LUA_API int   lua_setmetatable (lua_State *L, int objindex);
 LUA_API int   lua_setglobals (lua_State *L, int index);


 /*
 ** `load' and `call' functions (load and run Lua code)
 */
 LUA_API void  lua_call (lua_State *L, int nargs, int nresults);
 LUA_API int   lua_pcall (lua_State *L, int nargs, int nresults, int errfunc);
 LUA_API int   lua_load (lua_State *L, lua_Chunkreader reader, void *data,
                         const char *chunkname);


 /*
 ** coroutine functions
 */
 LUA_API void lua_cobegin (lua_State *L, int nargs);
 LUA_API int  lua_yield (lua_State *L, int nresults);
 LUA_API int  lua_resume (lua_State *L, lua_State *co);

 /*
 ** Garbage-collection functions
 */
 LUA_API int   lua_getgcthreshold (lua_State *L);
 LUA_API int   lua_getgccount (lua_State *L);
 LUA_API void  lua_setgcthreshold (lua_State *L, int newthreshold);

 /*
 ** miscellaneous functions
 */

 LUA_API int   lua_error (lua_State *L);

 LUA_API int   lua_next (lua_State *L, int index);

 LUA_API void  lua_concat (lua_State *L, int n);

 LUA_API void *lua_newuserdata (lua_State *L, size_t size);


 /*
 ** ===============================================================
 ** some useful macros
 ** ===============================================================
 */

 #define lua_boxpointer(L,u) \
 	(*(void **)(lua_newuserdata(L, sizeof(void *))) = (u))

 #define lua_unboxpointer(L,i)	(*(void **)(lua_touserdata(L, i)))

 #define lua_pop(L,n)		lua_settop(L, -(n)-1)

 #define lua_register(L,n,f) \
 	(lua_pushstring(L, n), \
 	 lua_pushcfunction(L, f), \
 	 lua_settable(L, LUA_GLOBALSINDEX))

 #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_isuserdata(L,n)	(lua_type(L,n) >= LUA_TUSERDATA)
 #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_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_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1)


 /*
 ** compatibility macros and functions
 */


 LUA_API int lua_pushupvalues (lua_State *L);

 #define lua_getregistry(L)	lua_pushvalue(L, LUA_REGISTRYINDEX)
 #define lua_setglobal(L,s)	\
    (lua_pushstring(L, s), lua_insert(L, -2), lua_settable(L, LUA_GLOBALSINDEX))

 #define lua_getglobal(L,s)	\
 		(lua_pushstring(L, s), lua_gettable(L, LUA_GLOBALSINDEX))

 #define lua_isnull	lua_isnone


 /* compatibility with ref system */

 /* pre-defined references */
 #define LUA_NOREF	(-2)
 #define LUA_REFNIL	(-1)

 #define lua_ref(L,lock)	((lock) ? luaL_ref(L, LUA_REGISTRYINDEX) : \
       (lua_pushstring(L, "unlocked references are obsolete"), lua_error(L), 0))

 #define lua_unref(L,ref)	luaL_unref(L, LUA_REGISTRYINDEX, (ref))

 #define lua_getref(L,ref)	lua_rawgeti(L, LUA_REGISTRYINDEX, ref)


 /*
 ** {======================================================================
 ** useful definitions for Lua kernel and libraries
 ** =======================================================================
 */

 /* formats for Lua numbers */
 #ifndef LUA_NUMBER_SCAN
 #define LUA_NUMBER_SCAN		"%lf"
 #endif

 #ifndef LUA_NUMBER_FMT
 #define LUA_NUMBER_FMT		"%.16g"
 #endif

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


 /*
 ** {======================================================================
 ** Debug API
 ** =======================================================================
 */

 typedef enum lua_Hookevent {
   LUA_HOOKCALL, LUA_HOOKRET, LUA_HOOKLINE, LUA_HOOKCOUNT
 } lua_Hookevent;


 #define LUA_MASKCALL	(2 << LUA_HOOKCALL)
 #define LUA_MASKRET	(2 << LUA_HOOKRET)
 #define LUA_MASKLINE	(2 << LUA_HOOKLINE)
 #define LUA_MASKCOUNT(count)	((unsigned long)(count) << 8)
 #define lua_getmaskcount(mask)	((mask) >> 8)

 #define LUA_MAXCOUNT	((1<<24) - 1)

 typedef struct lua_Debug lua_Debug;  /* activation record */

 typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar);


 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 int lua_sethook (lua_State *L, lua_Hook func, unsigned long mask);
 LUA_API lua_Hook lua_gethook (lua_State *L);
 LUA_API unsigned long lua_gethookmask (lua_State *L);


 #define LUA_IDSIZE	60

 struct lua_Debug {
   lua_Hookevent event;
   const char *name;	/* (n) */
   const char *namewhat;	/* (n) `global', `local', `field', `method' */
   const char *what;	/* (S) `Lua' function, `C' function, Lua `main' */
   const char *source;	/* (S) */
   int currentline;	/* (l) */
   int nups;		/* (u) number of upvalues */
   int linedefined;	/* (S) */
   char short_src[LUA_IDSIZE]; /* (S) */
   /* private part */
   int i_ci;  /* active function */
 };

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


 /******************************************************************************
 * Copyright (C) 2002 Tecgraf, PUC-Rio.  All rights reserved.
 *
 * 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
	/*
	** $Id: lua.h,v 1.153 2002/08/06 18:54:18 roberto Exp roberto $
	** Lua - An Extensible Extension Language
	** Tecgraf: Computer Graphics Technology Group, PUC-Rio, Brazil
	** http://www.lua.org mailto:info@lua.org
	** See Copyright Notice at the end of this file
	*/


	#ifndef lua_h
	#define lua_h


	/* definition of `va_list' */
	#include <stdarg.h>

	/* definition of `size_t' */
	#include <stddef.h>



	#define LUA_VERSION "Lua 5.0 (alpha)"
	#define LUA_COPYRIGHT "Copyright (C) 1994-2002 Tecgraf, PUC-Rio"
	#define LUA_AUTHORS "W. Celes, R. Ierusalimschy & L. H. de Figueiredo"



	/* option for multiple returns in `lua_pcall' and `lua_call' */
	#define LUA_MULTRET (-1)


	/*
	** pseudo-indices
	*/
	#define LUA_REGISTRYINDEX (-10000)
	#define LUA_GLOBALSINDEX (-10001)
	#define lua_upvalueindex(i) (LUA_GLOBALSINDEX-(i))


	/* error codes for `lua_load' and `lua_pcall' */
	#define LUA_ERRRUN 1
	#define LUA_ERRFILE 2
	#define LUA_ERRSYNTAX 3
	#define LUA_ERRMEM 4
	#define LUA_ERRERR 5
	#define LUA_ERRTHROW 6


	typedef struct lua_State lua_State;

	typedef int (lua_CFunction) (lua_State L);


	/*
	** functions that read blocks when loading Lua chunk
	*/
	typedef const char * (lua_Chunkreader) (lua_State L, void ud, size_t size);


	/*
	** basic types
	*/
	#define LUA_TNONE (-1)

	#define LUA_TNIL 0
	#define LUA_TNUMBER 1
	#define LUA_TSTRING 2
	#define LUA_TBOOLEAN 3
	#define LUA_TTABLE 4
	#define LUA_TFUNCTION 5
	#define LUA_TUSERDATA 6
	#define LUA_TLIGHTUSERDATA 7


	/* minimum Lua stack available to a C function */
	#define LUA_MINSTACK 20


	/*
	** generic extra include file
	*/
	#ifdef LUA_USER_H
	#include LUA_USER_H
	#endif


	/* type of Numbers in Lua */
	#ifndef LUA_NUMBER
	#define LUA_NUMBER double
	#endif
	typedef LUA_NUMBER lua_Number;


	/* mark for all API functions */
	#ifndef LUA_API
	#define LUA_API extern
	#endif


	/*
	** state manipulation
	*/
	LUA_API lua_State *lua_open (void);
	LUA_API void lua_close (lua_State *L);
	LUA_API lua_State lua_newthread (lua_State L);
	LUA_API void lua_closethread (lua_State L, lua_State thread);

	LUA_API lua_CFunction lua_atpanic (lua_State *L, lua_CFunction panicf);


	/*
	** basic stack manipulation
	*/
	LUA_API int lua_gettop (lua_State *L);
	LUA_API void lua_settop (lua_State *L, int index);
	LUA_API void lua_pushvalue (lua_State *L, int index);
	LUA_API void lua_remove (lua_State *L, int index);
	LUA_API void lua_insert (lua_State *L, int index);
	LUA_API void lua_replace (lua_State *L, int index);
	LUA_API int lua_checkstack (lua_State *L, int size);


	/*
	** access functions (stack -> C)
	*/

	LUA_API int lua_isnumber (lua_State *L, int index);
	LUA_API int lua_isstring (lua_State *L, int index);
	LUA_API int lua_iscfunction (lua_State *L, int index);
	LUA_API int lua_type (lua_State *L, int index);
	LUA_API const char lua_typename (lua_State L, int type);

	LUA_API int lua_equal (lua_State *L, int index1, int index2);
	LUA_API int lua_rawequal (lua_State *L, int index1, int index2);
	LUA_API int lua_lessthan (lua_State *L, int index1, int index2);

	LUA_API lua_Number lua_tonumber (lua_State *L, int index);
	LUA_API int lua_toboolean (lua_State *L, int index);
	LUA_API const char lua_tostring (lua_State L, int index);
	LUA_API size_t lua_strlen (lua_State *L, int index);
	LUA_API lua_CFunction lua_tocfunction (lua_State *L, int index);
	LUA_API void lua_touserdata (lua_State L, int index);
	LUA_API const void lua_topointer (lua_State L, int index);


	/*
	** 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_pushlstring (lua_State L, const char s, size_t len);
	LUA_API void 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);


	/*
	** get functions (Lua -> stack)
	*/
	LUA_API void lua_gettable (lua_State *L, int index);
	LUA_API void lua_rawget (lua_State *L, int index);
	LUA_API void lua_rawgeti (lua_State *L, int index, int n);
	LUA_API void lua_newtable (lua_State *L);
	LUA_API int lua_getmetatable (lua_State *L, int objindex);
	LUA_API const char lua_getmode (lua_State L, int index);
	LUA_API void lua_getglobals (lua_State *L, int index);


	/*
	** set functions (stack -> Lua)
	*/
	LUA_API void lua_settable (lua_State *L, int index);
	LUA_API void lua_rawset (lua_State *L, int index);
	LUA_API void lua_rawseti (lua_State *L, int index, int n);
	LUA_API void lua_setmode (lua_State L, int index, const char mode);
	LUA_API int lua_setmetatable (lua_State *L, int objindex);
	LUA_API int lua_setglobals (lua_State *L, int index);


	/*
	** `load' and `call' functions (load and run Lua code)
	*/
	LUA_API void lua_call (lua_State *L, int nargs, int nresults);
	LUA_API int lua_pcall (lua_State *L, int nargs, int nresults, int errfunc);
	LUA_API int lua_load (lua_State L, lua_Chunkreader reader, void data,
	const char *chunkname);


	/*
	** coroutine functions
	*/
	LUA_API void lua_cobegin (lua_State *L, int nargs);
	LUA_API int lua_yield (lua_State *L, int nresults);
	LUA_API int lua_resume (lua_State L, lua_State co);

	/*
	** Garbage-collection functions
	*/
	LUA_API int lua_getgcthreshold (lua_State *L);
	LUA_API int lua_getgccount (lua_State *L);
	LUA_API void lua_setgcthreshold (lua_State *L, int newthreshold);

	/*
	** miscellaneous functions
	*/

	LUA_API int lua_error (lua_State *L);

	LUA_API int lua_next (lua_State *L, int index);

	LUA_API void lua_concat (lua_State *L, int n);

	LUA_API void lua_newuserdata (lua_State L, size_t size);



	/*
	** ===============================================================
	** some useful macros
	** ===============================================================
	*/

	#define lua_boxpointer(L,u) \
	((void )(lua_newuserdata(L, sizeof(void ))) = (u))

	#define lua_unboxpointer(L,i) ((void *)(lua_touserdata(L, i)))

	#define lua_pop(L,n) lua_settop(L, -(n)-1)

	#define lua_register(L,n,f) \
	(lua_pushstring(L, n), \
	lua_pushcfunction(L, f), \
	lua_settable(L, LUA_GLOBALSINDEX))

	#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_isuserdata(L,n) (lua_type(L,n) >= LUA_TUSERDATA)
	#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_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_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1)



	/*
	** compatibility macros and functions
	*/


	LUA_API int lua_pushupvalues (lua_State *L);

	#define lua_getregistry(L) lua_pushvalue(L, LUA_REGISTRYINDEX)
	#define lua_setglobal(L,s) \
	(lua_pushstring(L, s), lua_insert(L, -2), lua_settable(L, LUA_GLOBALSINDEX))

	#define lua_getglobal(L,s) \
	(lua_pushstring(L, s), lua_gettable(L, LUA_GLOBALSINDEX))

	#define lua_isnull lua_isnone


	/* compatibility with ref system */

	/* pre-defined references */
	#define LUA_NOREF (-2)
	#define LUA_REFNIL (-1)

	#define lua_ref(L,lock) ((lock) ? luaL_ref(L, LUA_REGISTRYINDEX) : \
	(lua_pushstring(L, "unlocked references are obsolete"), lua_error(L), 0))

	#define lua_unref(L,ref) luaL_unref(L, LUA_REGISTRYINDEX, (ref))

	#define lua_getref(L,ref) lua_rawgeti(L, LUA_REGISTRYINDEX, ref)



	/*
	** {======================================================================
	** useful definitions for Lua kernel and libraries
	** =======================================================================
	*/

	/* formats for Lua numbers */
	#ifndef LUA_NUMBER_SCAN
	#define LUA_NUMBER_SCAN "%lf"
	#endif

	#ifndef LUA_NUMBER_FMT
	#define LUA_NUMBER_FMT "%.16g"
	#endif

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


	/*
	** {======================================================================
	** Debug API
	** =======================================================================
	*/

	typedef enum lua_Hookevent {
	LUA_HOOKCALL, LUA_HOOKRET, LUA_HOOKLINE, LUA_HOOKCOUNT
	} lua_Hookevent;


	#define LUA_MASKCALL (2 << LUA_HOOKCALL)
	#define LUA_MASKRET (2 << LUA_HOOKRET)
	#define LUA_MASKLINE (2 << LUA_HOOKLINE)
	#define LUA_MASKCOUNT(count) ((unsigned long)(count) << 8)
	#define lua_getmaskcount(mask) ((mask) >> 8)

	#define LUA_MAXCOUNT ((1<<24) - 1)

	typedef struct lua_Debug lua_Debug; /* activation record */

	typedef void (lua_Hook) (lua_State L, lua_Debug *ar);


	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 int lua_sethook (lua_State *L, lua_Hook func, unsigned long mask);
	LUA_API lua_Hook lua_gethook (lua_State *L);
	LUA_API unsigned long lua_gethookmask (lua_State *L);


	#define LUA_IDSIZE 60

	struct lua_Debug {
	lua_Hookevent event;
	const char name; / (n) */
	const char namewhat; / (n) `global', `local', `field', `method' */
	const char what; / (S) `Lua' function, `C' function, Lua `main' */
	const char source; / (S) */
	int currentline; /* (l) */
	int nups; /* (u) number of upvalues */
	int linedefined; /* (S) */
	char short_src[LUA_IDSIZE]; /* (S) */
	/* private part */
	int i_ci; /* active function */
	};

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


	/******************************************************************************
	* Copyright (C) 2002 Tecgraf, PUC-Rio. All rights reserved.
	*
	* 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