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/*
** LUA - An Extensible Extension Language
** TeCGraf: Grupo de Tecnologia em Computacao Grafica, PUC-Rio, Brazil
** e-mail: lua@tecgraf.puc-rio.br
** $Id: lua.h,v 4.4 1997/05/26 14:42:51 roberto Exp roberto $
*/
#ifndef lua_h
#define lua_h
#define LUA_VERSION "Lua 3.0 (alpha)"
#define LUA_COPYRIGHT "Copyright (C) 1994-1997 TeCGraf"
#define LUA_AUTHORS "W. Celes, R. Ierusalimschy & L. H. de Figueiredo"
#define LUA_NOOBJECT 0
typedef void (*lua_CFunction) (void);
typedef unsigned int lua_Object;
void lua_settagmethod (int tag, char *event, lua_CFunction method);
void lua_gettagmethod (int tag, char *event); /* out: method */
void lua_seterrormethod (lua_CFunction method);
int lua_newtag (void);
void lua_settag (int tag); /* In: object */
void lua_error (char *s);
int lua_dofile (char *filename); /* Out: returns */
int lua_dostring (char *string); /* Out: returns */
int lua_callfunction (lua_Object f);
/* In: parameters; Out: returns */
int lua_call (char *funcname);
/* In: parameters; Out: returns */
void lua_beginblock (void);
void lua_endblock (void);
lua_Object lua_lua2C (int number);
#define lua_getparam(_) lua_lua2C(_)
#define lua_getresult(_) lua_lua2C(_)
int lua_isnil (lua_Object object);
int lua_istable (lua_Object object);
int lua_isuserdata (lua_Object object);
int lua_iscfunction (lua_Object object);
int lua_isnumber (lua_Object object);
int lua_isstring (lua_Object object);
int lua_isfunction (lua_Object object);
float lua_getnumber (lua_Object object);
char *lua_getstring (lua_Object object);
lua_CFunction lua_getcfunction (lua_Object object);
void *lua_getbindata (lua_Object object);
int lua_getbindatasize (lua_Object object);
void lua_pushnil (void);
void lua_pushnumber (float n);
void lua_pushstring (char *s);
void lua_pushcfunction (lua_CFunction fn);
void lua_pushbindata (void *buff, int size, int tag);
void lua_pushusertag (void *u, int tag);
void lua_pushobject (lua_Object object);
lua_Object lua_getglobal (char *name);
lua_Object lua_rawgetglobal (char *name);
void lua_setglobal (char *name); /* In: value */
void lua_rawsetglobal (char *name); /* In: value */
void lua_settable (void); /* In: table, index, value */
void lua_rawsettable (void); /* In: table, index, value */
lua_Object lua_gettable (void); /* In: table, index */
lua_Object lua_rawgettable (void); /* In: table, index */
int lua_tag (lua_Object object);
int lua_ref (int lock); /* In: value */
lua_Object lua_getref (int ref);
void lua_unref (int ref);
lua_Object lua_createtable (void);
long lua_collectgarbage (long limit);
/* =============================================================== */
/* some useful macros */
#define lua_pushref(ref) (lua_pushobject(lua_getref(ref)))
#define lua_refobject(o,l) (lua_pushobject(o), lua_ref(l))
#define lua_register(n,f) (lua_pushcfunction(f), lua_setglobal(n))
#define lua_pushuserdata(u) lua_pushusertag(u, 0)
/* =============================================================== */
/* for compatibility with old versions. Avoid using these macros/functions */
lua_Object lua_setfallback (char *event, lua_CFunction fallback);
#define lua_storeglobal lua_setglobal
#define lua_type lua_tag
void *lua_getuserdata (lua_Object object);
#define lua_lockobject(o) lua_refobject(o,1)
#define lua_lock() lua_ref(1)
#define lua_getlocked lua_getref
#define lua_pushlocked lua_pushref
#define lua_unlock lua_unref
#define lua_pushliteral(o) lua_pushstring(o)
#define lua_getindexed(o,n) (lua_pushobject(o), lua_pushnumber(n), lua_gettable())
#define lua_getfield(o,f) (lua_pushobject(o), lua_pushliteral(f), lua_gettable())
#define lua_copystring(o) (strdup(lua_getstring(o)))
#define lua_getsubscript lua_gettable
#define lua_storesubscript lua_settable
#endif
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