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/*
* Copyright (C) 2013 Patrick "P. J." McDermott
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
#include "../logging.h"
#include "../scripting/ffi.h"
#include "script.h"
#include "resource.h"
/* LUA_OK is defined in Lua 5.2 but not 5.1. */
#ifndef LUA_OK
#define LUA_OK 0
#endif
static struct resource_table script_res;
struct script *
script_get(const char *path)
{
struct script *s;
s = (struct script *) resource_get(&script_res, path);
if (s != NULL) {
resource_use((struct resource *) s);
return s;
}
s = resource_alloc(path, sizeof(*s));
/* Load the script. */
s->lua_state = luaL_newstate();
luaL_openlibs(s->lua_state);
if (luaL_loadfile(s->lua_state, path) != LUA_OK) {
err(1, "Error loading script: %s\n",
lua_tostring(s->lua_state, -1));
}
/* Run the script once to let it define functions. */
if (lua_pcall(s->lua_state, 0, 0, 0) != LUA_OK) {
err(1, "Error running script: %s\n",
lua_tostring(s->lua_state, -1));
}
ffi_register_functions(s);
resource_use((struct resource *) s);
resource_add(&script_res, path, (struct resource *) s);
return s;
}
void
script_free(struct script *script)
{
lua_State *data;
if (script == NULL) {
return;
}
data = script->lua_state;
if (resource_free(&script_res, (struct resource *) script)) {
lua_close(data);
}
}
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