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/*
** LUA - Linguagem para Usuarios de Aplicacao
** Grupo de Tecnologia em Computacao Grafica
** TeCGraf - PUC-Rio
** $Id: lua.h,v 3.16 1995/01/27 17:19:06 celes Exp $
*/
#ifndef lua_h
#define lua_h
/* Private Part */
typedef enum
{
LUA_T_NIL = -1,
LUA_T_NUMBER = -2,
LUA_T_STRING = -3,
LUA_T_ARRAY = -4,
LUA_T_FUNCTION = -5,
LUA_T_CFUNCTION= -6,
LUA_T_USERDATA = 0
} lua_Type;
/* Public Part */
#define LUA_NOOBJECT 0
typedef void (*lua_CFunction) (void);
typedef unsigned int lua_Object;
lua_Object lua_setfallback (char *name, lua_CFunction fallback);
void lua_error (char *s);
int lua_dofile (char *filename);
int lua_dostring (char *string);
int lua_callfunction (lua_Object function);
int lua_call (char *funcname);
void lua_beginblock (void);
void lua_endblock (void);
lua_Object lua_getparam (int number);
#define lua_getresult(_) lua_getparam(_)
float lua_getnumber (lua_Object object);
char *lua_getstring (lua_Object object);
lua_CFunction lua_getcfunction (lua_Object object);
void *lua_getuserdata (lua_Object object);
void lua_pushnil (void);
void lua_pushnumber (float n);
void lua_pushstring (char *s);
void lua_pushliteral (char *s);
void lua_pushcfunction (lua_CFunction fn);
void lua_pushusertag (void *u, int tag);
void lua_pushobject (lua_Object object);
lua_Object lua_getglobal (char *name);
void lua_storeglobal (char *name);
void lua_storesubscript (void);
lua_Object lua_getsubscript (void);
int lua_type (lua_Object object);
int lua_lock (void);
lua_Object lua_getlocked (int ref);
void lua_pushlocked (int ref);
void lua_unlock (int ref);
lua_Object lua_createtable (void);
/* some useful macros */
#define lua_lockobject(o) (lua_pushobject(o), lua_lock())
#define lua_register(n,f) (lua_pushcfunction(f), lua_storeglobal(n))
#define lua_pushuserdata(u) lua_pushusertag(u, LUA_T_USERDATA)
#define lua_isnil(_) (lua_type(_)==LUA_T_NIL)
#define lua_isnumber(_) (lua_type(_)==LUA_T_NUMBER)
#define lua_isstring(_) (lua_type(_)==LUA_T_STRING)
#define lua_istable(_) (lua_type(_)==LUA_T_ARRAY)
#define lua_isfunction(_) (lua_type(_)==LUA_T_FUNCTION)
#define lua_iscfunction(_) (lua_type(_)==LUA_T_CFUNCTION)
#define lua_isuserdata(_) (lua_type(_)>=LUA_T_USERDATA)
/* for lua 1.1 compatibility. Avoid using these macros */
#define lua_getindexed(o,n) (lua_pushobject(o), lua_pushnumber(n), lua_getsubscript())
#define lua_getfield(o,f) (lua_pushobject(o), lua_pushliteral(f), lua_getsubscript())
#define lua_copystring(o) (strdup(lua_getstring(o)))
#endif
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