osrm-backend/DataStructures/HashTable.h

79 lines
2.1 KiB
C++

/*
open source routing machine
Copyright (C) Dennis Luxen, others 2010
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU AFFERO General Public License as published by
the Free Software Foundation; either version 3 of the License, or
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 General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
or see http://www.gnu.org/licenses/agpl.txt.
Created on: 18.11.2010
Author: dennis
*/
#ifndef HASHTABLE_H_
#define HASHTABLE_H_
#include <boost/unordered_map.hpp>
template<typename keyT, typename valueT>
class HashTable {
typedef boost::unordered_map<keyT, valueT> MyHashTable;
public:
typedef typename boost::unordered_map<keyT, valueT>::const_iterator MyIterator;
typedef MyIterator iterator;
HashTable() { }
HashTable(const unsigned size) {
table.resize(size);
}
void Add(const keyT& key, const valueT& value){
table[key] = value;
}
void Set(const keyT& key, const valueT& value){
table[key] = value;
}
valueT Find(const keyT& key) {
if(table.find(key) == table.end())
return valueT();
return table.find(key)->second;
}
bool Holds(const keyT& key) {
if(table.find(key) == table.end())
return false;
return true;
}
void EraseAll() {
if(table.size() > 0)
table.clear();
}
inline
valueT & operator[] (keyT key) {
return table[key];
}
unsigned Size() const {
return table.size();
}
MyIterator begin() const {
return table.begin();
}
MyIterator end() const {
return table.end();
}
private:
MyHashTable table;
};
#endif /* HASHTABLE_H_ */