90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/*
|
|
* lualib.h - useful functions and type for Lua
|
|
*
|
|
* Copyright © 2009 Julien Danjou <julien@danjou.info>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
*/
|
|
|
|
#ifndef AWESOME_COMMON_LUALIB
|
|
#define AWESOME_COMMON_LUALIB
|
|
|
|
#include <lua.h>
|
|
|
|
#include "common/util.h"
|
|
|
|
/** Lua function to call on dofunction() error */
|
|
lua_CFunction lualib_dofunction_on_error;
|
|
|
|
void luaA_checkfunction(lua_State *, int);
|
|
void luaA_checktable(lua_State *, int);
|
|
|
|
/** Dump the Lua stack. Useful for debugging.
|
|
* \param L The Lua VM state.
|
|
*/
|
|
void luaA_dumpstack(lua_State *);
|
|
|
|
/** Convert s stack index to positive.
|
|
* \param L The Lua VM state.
|
|
* \param ud The index.
|
|
* \return A positive index.
|
|
*/
|
|
static inline int
|
|
luaA_absindex(lua_State *L, int ud)
|
|
{
|
|
return (ud > 0 || ud <= LUA_REGISTRYINDEX) ? ud : lua_gettop(L) + ud + 1;
|
|
}
|
|
|
|
static inline int
|
|
luaA_dofunction_error(lua_State *L)
|
|
{
|
|
if(lualib_dofunction_on_error)
|
|
return lualib_dofunction_on_error(L);
|
|
return 0;
|
|
}
|
|
|
|
/** Execute an Lua function on top of the stack.
|
|
* \param L The Lua stack.
|
|
* \param nargs The number of arguments for the Lua function.
|
|
* \param nret The number of returned value from the Lua function.
|
|
* \return True on no error, false otherwise.
|
|
*/
|
|
static inline bool
|
|
luaA_dofunction(lua_State *L, int nargs, int nret)
|
|
{
|
|
/* Move function before arguments */
|
|
lua_insert(L, - nargs - 1);
|
|
/* Push error handling function */
|
|
lua_pushcfunction(L, luaA_dofunction_error);
|
|
/* Move error handling function before args and function */
|
|
lua_insert(L, - nargs - 2);
|
|
int error_func_pos = lua_gettop(L) - nargs - 1;
|
|
if(lua_pcall(L, nargs, nret, - nargs - 2))
|
|
{
|
|
warn("%s", lua_tostring(L, -1));
|
|
/* Remove error function and error string */
|
|
lua_pop(L, 2);
|
|
return false;
|
|
}
|
|
/* Remove error function */
|
|
lua_remove(L, error_func_pos);
|
|
return true;
|
|
}
|
|
|
|
#endif
|
|
|
|
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
|