Initial commit

src/nameidmapping.h

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+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+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 2.1 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, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#pragma once
+
+#include <string>
+#include <iostream>
+#include <set>
+#include <unordered_map>
+#include "irrlichttypes_bloated.h"
+
+typedef std::unordered_map<u16, std::string> IdToNameMap;
+typedef std::unordered_map<std::string, u16> NameToIdMap;
+
+class NameIdMapping
+{
+public:
+	void serialize(std::ostream &os) const;
+	void deSerialize(std::istream &is);
+
+	void clear()
+	{
+		m_id_to_name.clear();
+		m_name_to_id.clear();
+	}
+
+	void set(u16 id, const std::string &name)
+	{
+		m_id_to_name[id] = name;
+		m_name_to_id[name] = id;
+	}
+
+	void removeId(u16 id)
+	{
+		std::string name;
+		bool found = getName(id, name);
+		if (!found)
+			return;
+		m_id_to_name.erase(id);
+		m_name_to_id.erase(name);
+	}
+
+	void eraseName(const std::string &name)
+	{
+		u16 id;
+		bool found = getId(name, id);
+		if (!found)
+			return;
+		m_id_to_name.erase(id);
+		m_name_to_id.erase(name);
+	}
+	bool getName(u16 id, std::string &result) const
+	{
+		IdToNameMap::const_iterator i;
+		i = m_id_to_name.find(id);
+		if (i == m_id_to_name.end())
+			return false;
+		result = i->second;
+		return true;
+	}
+	bool getId(const std::string &name, u16 &result) const
+	{
+		NameToIdMap::const_iterator i;
+		i = m_name_to_id.find(name);
+		if (i == m_name_to_id.end())
+			return false;
+		result = i->second;
+		return true;
+	}
+	u16 size() const { return m_id_to_name.size(); }
+
+private:
+	IdToNameMap m_id_to_name;
+	NameToIdMap m_name_to_id;
+};