scripts_lua.cpp

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/*
Copyright (C) 2002-2020 UFO: Alien Invasion.

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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#include "scripts_lua.h"
#include "../shared/cxx.h"

int Com_LuaIsNilOrTable (lua_State* L, int index) {
    return (lua_isnil(L, index) || lua_istable(L, index));
}

linkedList_t* Com_LuaTableToStringList (lua_State* L, int index) {
    if (lua_isnil(L, index))
        return nullptr;

    linkedList_t* result = nullptr;
    /* table is in the stack at 'index' */
    lua_pushnil(L);  /* first key */
    while (lua_next(L, index) != 0) {
        /* 'key' at index -2 and 'value' at index -1 */
        const char* v = lua_tostring(L, -1);
        if (v)
            LIST_AddString(&result, v);
        /* removes 'value', keeps 'key' for next iteration */
        lua_pop(L, 1);
    }
    return result;
}