Function check_penarray_native

library/LuaApi.cpp:972–982

using Screen::PenArray;

static PenArray *check_penarray_native(lua_State *L, int index)
{
    lua_rawgetp(L, LUA_REGISTRYINDEX, &DFHACK_PENARRAY_TOKEN);

    if (!lua_getmetatable(L, index) || !lua_rawequal(L, -1, -2))
        luaL_argerror(L, index, "not a penarray object");

    lua_pop(L, 2);

    return (PenArray*)lua_touserdata(L, index);
}

static int dfhack_penarray_new(lua_State *L)
{