/* ** $Id: lua.h,v 1.142 2002/06/20 20:41:46 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 /* definition of `size_t' */ #include #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) /* index for a traceback function in the registry */ #define LUA_TRACEBACK "_TRACEBACK" /* ** 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) (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_TUSERDATA 5 #define LUA_TUDATAVAL 6 #define LUA_TFUNCTION 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_pushudataval (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 void lua_getglobals (lua_State *L, int level); /* ** 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 int lua_setmetatable (lua_State *L, int objindex); LUA_API int lua_setglobals (lua_State *L, int level); /* ** `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); 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 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_newpointerbox(L,u) \ (*(void **)(lua_newuserdata(L, sizeof(void *))) = (u)) #define lua_getfrombox(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_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) #endif /* ** {====================================================================== ** 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 /* function to convert a lua_Number to int (with any rounding method) */ #ifndef lua_number2int #define lua_number2int(i,n) ((i)=(int)(n)) #endif /* }====================================================================== */ /****************************************************************************** * 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. ******************************************************************************/