1 /*
2 Minetest
3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
4 
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
9 
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 GNU Lesser General Public License for more details.
14 
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19 
20 #pragma once
21 
22 #include <string>
23 #include <iostream>
24 #include <set>
25 #include <unordered_map>
26 #include "irrlichttypes_bloated.h"
27 
28 typedef std::unordered_map<u16, std::string> IdToNameMap;
29 typedef std::unordered_map<std::string, u16> NameToIdMap;
30 
31 class NameIdMapping
32 {
33 public:
34 	void serialize(std::ostream &os) const;
35 	void deSerialize(std::istream &is);
36 
clear()37 	void clear()
38 	{
39 		m_id_to_name.clear();
40 		m_name_to_id.clear();
41 	}
42 
set(u16 id,const std::string & name)43 	void set(u16 id, const std::string &name)
44 	{
45 		m_id_to_name[id] = name;
46 		m_name_to_id[name] = id;
47 	}
48 
removeId(u16 id)49 	void removeId(u16 id)
50 	{
51 		std::string name;
52 		bool found = getName(id, name);
53 		if (!found)
54 			return;
55 		m_id_to_name.erase(id);
56 		m_name_to_id.erase(name);
57 	}
58 
eraseName(const std::string & name)59 	void eraseName(const std::string &name)
60 	{
61 		u16 id;
62 		bool found = getId(name, id);
63 		if (!found)
64 			return;
65 		m_id_to_name.erase(id);
66 		m_name_to_id.erase(name);
67 	}
getName(u16 id,std::string & result)68 	bool getName(u16 id, std::string &result) const
69 	{
70 		IdToNameMap::const_iterator i;
71 		i = m_id_to_name.find(id);
72 		if (i == m_id_to_name.end())
73 			return false;
74 		result = i->second;
75 		return true;
76 	}
getId(const std::string & name,u16 & result)77 	bool getId(const std::string &name, u16 &result) const
78 	{
79 		NameToIdMap::const_iterator i;
80 		i = m_name_to_id.find(name);
81 		if (i == m_name_to_id.end())
82 			return false;
83 		result = i->second;
84 		return true;
85 	}
size()86 	u16 size() const { return m_id_to_name.size(); }
87 
88 private:
89 	IdToNameMap m_id_to_name;
90 	NameToIdMap m_name_to_id;
91 };
92