Function undo

src/editor.cpp:1188–1227

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void undo()
{
	node_t* node;
	if ( undospot == NULL )
	{
		return;
	}
	selectedEntity[0] = NULL;
	if ( undospot == undolist.last )
	{
		node_t* tempnode = undospot;
		makeUndo();
		undospot = tempnode;
	}
	free(map.tiles);
	free(camera.vismap);
	map_t* undomap = (map_t*)undospot->element;
	map.width = undomap->width;
	map.height = undomap->height;
	map.tiles = (Sint32*) malloc(sizeof(Sint32) * map.width * map.height * MAPLAYERS);
	camera.vismap = (bool*) malloc(sizeof(bool) * map.height * map.width);
    memset(camera.vismap, 0, sizeof(bool) * map.height * map.width);
	memcpy(map.tiles, undomap->tiles, sizeof(Sint32)*undomap->width * undomap->height * MAPLAYERS);
	list_FreeAll(map.entities);
	for ( node = undomap->entities->first; node != NULL; node = node->next )
	{
		Entity* entity = newEntity(((Entity*)node->element)->sprite, 1, map.entities, nullptr);

		setSpriteAttributes(entity, (Entity*)node->element, (Entity*)node->element);
	}
	if ( redospot != NULL )
	{
		redospot = redospot->prev;
	}
	else
	{
		redospot = undospot->next;
	}
	undospot = undospot->prev;
}

void redo()
{