/* ** $Id: lua.h,v 1.90 2001/02/23 17:28:12 roberto Exp roberto $ ** Lua - An Extensible Extension Language ** TeCGraf: Grupo de Tecnologia em Computacao Grafica, PUC-Rio, Brazil ** e-mail: lua@tecgraf.puc-rio.br ** www: http://www.tecgraf.puc-rio.br/lua/ ** See Copyright Notice at the end of this file */ #ifndef lua_h #define lua_h /* definition of `size_t' */ #include #define LUA_VERSION l_s("Lua 4.1 (work)") #define LUA_COPYRIGHT l_s("Copyright (C) 1994-2000 TeCGraf, PUC-Rio") #define LUA_AUTHORS l_s("W. Celes, R. Ierusalimschy & L. H. de Figueiredo") /* name of global variable with error handler */ #define LUA_ERRORMESSAGE l_s("_ERRORMESSAGE") /* pre-defined references */ #define LUA_NOREF (-2) #define LUA_REFNIL (-1) #define LUA_REFREGISTRY 0 /* pre-defined tags */ #define LUA_NOTAG (-2) /* option for multiple returns in lua_call */ #define LUA_MULTRET (-1) /* error codes for lua_do* */ #define LUA_ERRRUN 1 #define LUA_ERRFILE 2 #define LUA_ERRSYNTAX 3 #define LUA_ERRMEM 4 #define LUA_ERRERR 5 typedef struct lua_State lua_State; typedef int (*lua_CFunction) (lua_State *L); /* ** types returned by `lua_type' */ #define LUA_TNONE (-1) #define LUA_TUSERDATA 0 #define LUA_TNIL 1 #define LUA_TNUMBER 2 #define LUA_TSTRING 3 #define LUA_TTABLE 4 #define LUA_TFUNCTION 5 /* ** generic extra include file */ #ifdef LUA_USER_H #include LUA_USER_H #endif /* minimum stack available for a C function */ #define LUA_MINSTACK 20 /* Lua numerical type */ typedef double lua_Number; /* Lua character type */ typedef char l_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 int lua_type (lua_State *L, int index); LUA_API const l_char *lua_typename (lua_State *L, int t); LUA_API const l_char *lua_xtype (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_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 l_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 l_char *s, size_t len); LUA_API void lua_pushstring (lua_State *L, const l_char *s); LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n); LUA_API int lua_pushuserdata (lua_State *L, void *u); /* ** get functions (Lua -> stack) */ LUA_API void lua_getglobal (lua_State *L, const l_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 l_char *event); LUA_API int lua_getref (lua_State *L, int ref); LUA_API void lua_newtable (lua_State *L); /* ** set functions (stack -> Lua) */ LUA_API void lua_setglobal (lua_State *L, const l_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 l_char *event); LUA_API int lua_ref (lua_State *L, int lock); /* ** `do' functions (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_dofile (lua_State *L, const l_char *filename); LUA_API int lua_dostring (lua_State *L, const l_char *str); LUA_API int lua_dobuffer (lua_State *L, const l_char *buff, size_t size, const l_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 l_char *name, int basictype); LUA_API int lua_type2tag (lua_State *L, const l_char *name); LUA_API int lua_copytagmethods (lua_State *L, int tagto, int tagfrom); LUA_API void lua_settag (lua_State *L, int tag); LUA_API void lua_error (lua_State *L, const l_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); /* ** =============================================================== ** 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_pushusertag(L,u,t) (lua_pushuserdata(L, u), lua_settag(L, t)) #define lua_pushcfunction(L,f) lua_pushcclosure(L, f, 0) #define lua_clonetag(L,t) lua_copytagmethods(L, lua_newtag(L), (t)) #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_isnil(L,n) (lua_type(L,n) == LUA_TNIL) #define lua_isnull(L,n) (lua_type(L,n) == LUA_TNONE) #define lua_getregistry(L) lua_getref(L, LUA_REFREGISTRY) #define lua_pushliteral(L, s) lua_pushlstring(L, l_s("") s, \ (sizeof(s)/sizeof(l_char))-1) #define lua_newtag(L) lua_newtype(L, NULL, LUA_TNONE) #endif /****************************************************************************** * Copyright (C) 1994-2000 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. ******************************************************************************/