/*
** $Id: lua.h,v 1.62 2000/08/29 20:43:28 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 <stddef.h>
#define LUA_VERSION "Lua 4.0 (beta)"
#define LUA_COPYRIGHT "Copyright (C) 1994-2000 TeCGraf, PUC-Rio"
#define LUA_AUTHORS "W. Celes, R. Ierusalimschy & L. H. de Figueiredo"
#define LUA_ALERT "_ALERT"
#define LUA_ERRORMESSAGE "_ERRORMESSAGE"
#define LUA_NOREF (-2)
#define LUA_REFNIL (-1)
#define LUA_ANYTAG (-1)
#define LUA_NOTAG (-2)
#define LUA_MULTRET (-1)
#define LUA_MINSTACK 16
/* error codes for lua_do* */
#define LUA_ERRFILE 2
#define LUA_ERRSYNTAX 3
#define LUA_ERRRUN 1
#define LUA_ERRMEM 4
typedef struct lua_State lua_State;
typedef int (*lua_CFunction) (lua_State *L);
/*
** state manipulation
*/
lua_State *lua_newstate (int stacksize, int builtin);
void lua_close (lua_State *L);
/*
** basic stack manipulation
*/
int lua_gettop (lua_State *L);
void lua_settop (lua_State *L, int index);
void lua_pushobject (lua_State *L, int index);
int lua_stackspace (lua_State *L);
/*
** access functions (stack -> C)
*/
const char *lua_type (lua_State *L, int index);
int lua_isnumber (lua_State *L, int index);
int lua_iscfunction (lua_State *L, int index);
int lua_tag (lua_State *L, int index);
int lua_equal (lua_State *L, int index1, int index2);
double lua_tonumber (lua_State *L, int index);
const char *lua_tostring (lua_State *L, int index);
size_t lua_strlen (lua_State *L, int index);
lua_CFunction lua_tocfunction (lua_State *L, int index);
void *lua_touserdata (lua_State *L, int index);
/*
** push functions (C -> stack)
*/
void lua_pushnil (lua_State *L);
void lua_pushnumber (lua_State *L, double n);
void lua_pushlstring (lua_State *L, const char *s, size_t len);
void lua_pushstring (lua_State *L, const char *s);
void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n);
void lua_pushusertag (lua_State *L, void *u, int tag);
/*
** get functions (Lua -> stack)
*/
void lua_getglobal (lua_State *L, const char *name);
void lua_gettable (lua_State *L);
void lua_rawget (lua_State *L);
void lua_getglobals (lua_State *L);
void lua_gettagmethod (lua_State *L, int tag, const char *event);
int lua_getref (lua_State *L, int ref);
void lua_newtable (lua_State *L);
/*
** set functions (stack -> Lua)
*/
void lua_setglobal (lua_State *L, const char *name);
void lua_settable (lua_State *L);
void lua_rawset (lua_State *L);
void lua_setglobals (lua_State *L);
void lua_settagmethod (lua_State *L, int tag, const char *event);
int lua_ref (lua_State *L, int lock);
/*
** "do" functions (run Lua code)
*/
int lua_call (lua_State *L, int nargs, int nresults);
int lua_dofile (lua_State *L, const char *filename);
int lua_dostring (lua_State *L, const char *str);
int lua_dobuffer (lua_State *L, const char *buff, size_t size,
const char *name);
/*
** miscellaneous functions
*/
int lua_newtag (lua_State *L);
int lua_copytagmethods (lua_State *L, int tagto, int tagfrom);
void lua_settag (lua_State *L, int tag);
void lua_error (lua_State *L, const char *s);
void lua_unref (lua_State *L, int ref);
long lua_collectgarbage (lua_State *L, long limit);
int lua_next (lua_State *L);
/*
** ===============================================================
** some useful macros
** ===============================================================
*/
#define lua_register(L,n,f) (lua_pushcfunction(L, f), lua_setglobal(L, n))
#define lua_pushuserdata(L,u) lua_pushusertag(L, u, 0)
#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) == 'f')
#define lua_isstring(L,n) (lua_tostring(L,n) != 0)
#define lua_istable(L,n) (*lua_type(L,n) == 't')
#define lua_isuserdata(L,n) (*lua_type(L,n) == 'u')
#define lua_isnil(L,n) (lua_type(L,n)[2] == 'l')
#define lua_isnull(L,n) (*lua_type(L,n) == 'N')
#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.
******************************************************************************/