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// Description:
// Hash functions for strings.
//
// Copyright (C) 2001 Frank Becker
//
// This program is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation; either version 2 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 General Public License for more details
//
#ifndef _HashString_hpp_
#define _HashString_hpp_
#include <hashMap.hpp>
#include <string>
using namespace std;
namespace HASH_NAMESPACE
{
template<>
struct hash<const string>
{
//a simple hash function for string
int operator()(const string & s) const
{
int hashval = 13*(int)s.size() + 5*s[(int)s.size()/2];
// cout << " > Hash of " << s << " = " << hashval << endl;
return hashval;
}
};
template<>
struct hash<string>
{
//a simple hash function for string
int operator()(string s) const
{
int hashval = 13*(int)s.size() + 5*s[(int)s.size()/2];
// cout << " > Hash of " << s << " = " << hashval << endl;
return hashval;
}
};
} //namespace std
#endif
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