void CNodeDefManager::updateAliases(IItemDefManager *idef)
{
	std::set<std::string> all = idef->getAll();
	m_name_id_mapping_with_aliases.clear();
	for (std::set<std::string>::iterator
			i = all.begin(); i != all.end(); ++i) {
		std::string name = *i;
		std::string convert_to = idef->getAlias(name);
		content_t id;
		if (m_name_id_mapping.getId(convert_to, id)) {
			m_name_id_mapping_with_aliases.insert(
				std::make_pair(name, id));
		}
	}
}
void generate_nodelist_and_update_ids(MapNode *nodes, size_t nodecount,
	std::vector<std::string> *usednodes, INodeDefManager *ndef)
{
	UNORDERED_MAP<content_t, content_t> nodeidmap;
	content_t numids = 0;

	for (size_t i = 0; i != nodecount; i++) {
		content_t id;
		content_t c = nodes[i].getContent();

		UNORDERED_MAP<content_t, content_t>::const_iterator it = nodeidmap.find(c);
		if (it == nodeidmap.end()) {
			id = numids;
			numids++;

			usednodes->push_back(ndef->get(c).name);
			nodeidmap.insert(std::make_pair(c, id));
		} else {
			id = it->second;
		}
		nodes[i].setContent(id);
	}
}
void CNodeDefManager::addNameIdMapping(content_t i, std::string name)
{
	m_name_id_mapping.set(i, name);
	m_name_id_mapping_with_aliases.insert(std::make_pair(name, i));
}