nameidmapping.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
#pragma once
 
#include <string>
#include <iostream>
#include <unordered_map>
#include <cassert>
#include "irrlichttypes.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)
        {
                assert(!name.empty());
                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
        {
                auto 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
        {
                auto 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;
};