Public API Reference

csutil/hashr.h

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/*
    Copyright (C) 2003 by Jorrit Tyberghein
              (C) 2003 by Frank Richter

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifndef __CS_UTIL_HASHR_H__
#define __CS_UTIL_HASHR_H__

#include "csutil/hash.h"
 

template <class T, class K = unsigned int> 
class csHashReversible : public csHash<T, K>
{
  csHash<K, T> reverse;
public:
  csHashReversible (int size = 23, int grow_rate = 5, int max_size = 20000) :
    csHash<T, K> (size, grow_rate, max_size), 
    reverse (size, grow_rate, max_size)
  {
  }
  void Put (const K& key, const T &value)
  {
    csHash<T, K>::Put (key, value);
    reverse.Put (value, key);
  }

  void PutUnique (const K& key, const T &value)
  {
    csHash<T, K>::PutUnique (key, value);
    reverse.PutUnique (value, key);
  }

  const K* GetKeyPointer (const T& key) const
  {
    return reverse.GetElementPointer (key);
  }
 
  const K& GetKey (const T& key, const K& fallback) const
  {
    return reverse.Get (key, fallback);
  }
};

#endif // __CS_UTIL_HASHR_H__

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