/* ** $Id: lua.h,v 1.104 2001/10/11 21:41:21 roberto Exp $ ** Lua - An Extensible Extension Language ** TeCGraf: Grupo de Tecnologia em Computacao Grafica, PUC-Rio, Brazil ** e-mail: info@lua.org ** www: http://www.lua.org ** See Copyright Notice at the end of this file */ #ifndef lua_h #define lua_h /* definition of `size_t' */ #include #define LUA_VERSION "Lua 4.1 (beta)" #define LUA_COPYRIGHT "Copyright (C) 1994-2001 TeCGraf, PUC-Rio" #define LUA_AUTHORS "W. Celes, R. Ierusalimschy & L. H. de Figueiredo" /* name of global variable with error handler */ #define LUA_ERRORMESSAGE "_ERRORMESSAGE" /* pre-defined references */ #define LUA_NOREF (-2) #define LUA_REFNIL (-1) /* option for multiple returns in `lua_call' */ #define LUA_MULTRET (-1) /* pseudo-index for registry */ #define LUA_REGISTRYINDEX (-10000) /* pseudo-indices for upvalues */ #define lua_upvalueindex(i) (LUA_REGISTRYINDEX-(i)) /* error codes for `lua_do*' and the like */ #define LUA_ERRRUN 1 #define LUA_ERRFILE 2 #define LUA_ERRSYNTAX 3 #define LUA_ERRMEM 4 #define LUA_ERRERR 5 /* weak-table modes */ #define LUA_WEAK_KEY 1 #define LUA_WEAK_VALUE 2 typedef struct lua_State lua_State; typedef int (*lua_CFunction) (lua_State *L); /* ** an invalid `tag' */ #define LUA_NOTAG (-1) /* ** tags for basic types */ #define LUA_TNONE LUA_NOTAG #define LUA_TUSERDATA 0 #define LUA_TNIL 1 #define LUA_TNUMBER 2 #define LUA_TSTRING 3 #define LUA_TTABLE 4 #define LUA_TFUNCTION 5 /* 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 /* Lua numerical type */ #ifndef LUA_NUMBER #define LUA_NUMBER double #endif typedef LUA_NUMBER lua_Number; /* Lua character type */ #ifndef L_CHAR #define L_CHAR char #endif typedef L_CHAR lua_char; /* mark for all API functions */ #ifndef LUA_API #define LUA_API extern #endif /* ** state manipulation */ LUA_API lua_State *lua_newthread (lua_State *L, int stacksize); LUA_API void lua_close (lua_State *L); /* ** 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 int lua_stackspace (lua_State *L); /* ** access functions (stack -> C) */ LUA_API const lua_char *lua_type (lua_State *L, int index); 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_tag (lua_State *L, int index); LUA_API int lua_rawtag (lua_State *L, int index); LUA_API int lua_equal (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 const lua_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 lua_char *s, size_t len); LUA_API void lua_pushstring (lua_State *L, const lua_char *s); LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n); /* ** get functions (Lua -> stack) */ LUA_API void lua_getglobal (lua_State *L, const lua_char *name); 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_getglobals (lua_State *L); LUA_API void lua_gettagmethod (lua_State *L, int tag, const lua_char *event); LUA_API void lua_newtable (lua_State *L); LUA_API void lua_getweakregistry (lua_State *L); /* ** set functions (stack -> Lua) */ LUA_API void lua_setglobal (lua_State *L, const lua_char *name); 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_setglobals (lua_State *L); LUA_API void lua_settagmethod (lua_State *L, int tag, const lua_char *event); LUA_API int lua_ref (lua_State *L, int lock); /* ** `load' and `do' functions (load and run Lua code) */ LUA_API int lua_call (lua_State *L, int nargs, int nresults); LUA_API void lua_rawcall (lua_State *L, int nargs, int nresults); LUA_API int lua_loadfile (lua_State *L, const lua_char *filename); LUA_API int lua_dofile (lua_State *L, const lua_char *filename); LUA_API int lua_dostring (lua_State *L, const lua_char *str); LUA_API int lua_loadbuffer (lua_State *L, const lua_char *buff, size_t size, const lua_char *name); LUA_API int lua_dobuffer (lua_State *L, const lua_char *buff, size_t size, const lua_char *name); /* ** 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_newtype (lua_State *L, const lua_char *name, int basictype); LUA_API void lua_settag (lua_State *L, int tag); LUA_API int lua_name2tag (lua_State *L, const lua_char *name); LUA_API const lua_char *lua_tag2name (lua_State *L, int tag); LUA_API void lua_error (lua_State *L, const lua_char *s); LUA_API void lua_unref (lua_State *L, int ref); LUA_API int lua_next (lua_State *L, int index); LUA_API int lua_getn (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); LUA_API void lua_newuserdatabox (lua_State *L, void *u); LUA_API void lua_setweakmode (lua_State *L, int mode); LUA_API int lua_getweakmode (lua_State *L, int index); /* ** =============================================================== ** some useful macros ** =============================================================== */ #define lua_open(n) lua_newthread(NULL, (n)) #define lua_pop(L,n) lua_settop(L, -(n)-1) #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_rawtag(L,n) == LUA_TFUNCTION) #define lua_istable(L,n) (lua_rawtag(L,n) == LUA_TTABLE) #define lua_isuserdata(L,n) (lua_rawtag(L,n) == LUA_TUSERDATA) #define lua_isnil(L,n) (lua_rawtag(L,n) == LUA_TNIL) #define lua_isnull(L,n) (lua_rawtag(L,n) == LUA_TNONE) #define lua_pushliteral(L, s) lua_pushlstring(L, s, \ (sizeof(s)/sizeof(lua_char))-1) #define lua_getregistry(L) lua_pushvalue(L, LUA_REGISTRYINDEX); #define lua_getref(L,ref) lua_rawgeti(L, LUA_REGISTRYINDEX, ref) /* ** compatibility macros and functions */ #define lua_newtag(L) lua_newtype(L, NULL, LUA_TNONE) #define lua_typename lua_tag2name LUA_API void lua_pushupvalues (lua_State *L); #endif /* ** {====================================================================== ** useful definitions for Lua kernel and libraries */ #ifdef LUA_PRIVATE #define l_char lua_char /* macro to control type of literal strings */ #ifndef l_s #define l_s(x) x #endif /* macro to control type of literal chars */ #ifndef l_c #define l_c(x) x #endif /* macro to `unsign' a character */ #ifndef uchar #define uchar(c) ((unsigned char)(c)) #endif /* integer type to hold the result of fgetc */ #ifndef l_charint #define l_charint int #endif /* ** formats for Lua numbers */ #ifndef LUA_NUMBER_SCAN #define LUA_NUMBER_SCAN "%lf" #endif #ifndef LUA_NUMBER_FMT #define LUA_NUMBER_FMT "%.16g" #endif /* function to convert a lua_Number to a string */ #ifndef lua_number2str #define lua_number2str(s,n) sprintf((s), l_s(LUA_NUMBER_FMT), (n)) #endif /* function to convert a string to a lua_Number */ #ifndef lua_str2number #define lua_str2number(s,p) strtod((s), (p)) #endif #endif /* }====================================================================== */ /****************************************************************************** * Copyright (C) 1994-2001 TeCGraf, PUC-Rio. 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, including commercial applications, 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 origin of this software must not be misrepresented; you must not * claim that you wrote the original software. If you use this software in a * product, an acknowledgment in the product documentation would be greatly * appreciated (but it is not required). * * - Altered source versions must be plainly marked as such, and must not be * misrepresented as being the original software. * * 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 held liable to any party for direct, indirect, special, * incidental, or consequential damages arising out of the use of this software * and its documentation. * * The Lua language and this implementation have been entirely designed and * written by Waldemar Celes Filho, Roberto Ierusalimschy and * Luiz Henrique de Figueiredo at TeCGraf, PUC-Rio. * * This implementation contains no third-party code. ******************************************************************************/