cmtkHashMapSTL.h

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/*
//
//  Copyright 1997-2009 Torsten Rohlfing
//  Copyright 2009 SRI International
//
//  This file is part of the Computational Morphometry Toolkit.
//
//  http://www.nitrc.org/projects/cmtk/
//
//  The Computational Morphometry Toolkit 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 3 of
//  the License, or (at your option) any later version.
//
//  The Computational Morphometry Toolkit 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 General Public License along
//  with the Computational Morphometry Toolkit.  If not, see
//  <http://www.gnu.org/licenses/>.
//
//  $Revision: 269 $
//
//  $LastChangedDate: 2009-07-17 15:14:48 -0700 (Fri, 17 Jul 2009) $
//
//  $LastChangedBy: torstenrohlfing $
//
*/

#ifndef __cmtkHashMapSTL_h_included_
#define __cmtkHashMapSTL_h_included_

#include <cmtkconfig.h>

#define HAVE_STL_HASH_MAP

#if defined(__APPLE__)
#  include <hash_map.h>
#elif defined(HAVE_UNORDERED_MAP)
#  include <unordered_map>
#elif defined(HAVE_UNORDERED_MAP_TR1)
#  include <tr1/unordered_map>
#elif defined(HAVE_HASH_MAP_H)
#  include <hash_map.h>
#elif defined(HAVE_HASH_MAP)
#  include <hash_map>
#else
#  undef HAVE_STL_HASH_MAP
#endif

#ifdef __APPLE__
namespace __gnu_cxx
{

  template<>
    struct hash<unsigned long long>
    {
      size_t
      operator()(unsigned long long __x) const
      { return (__x & 0xffff) ^ (__x >> 32 ); }
    };

}
#endif // #ifdef __APPLE__

#ifdef HAVE_STL_HASH_MAP
namespace
cmtk
{

#ifndef __APPLE__

template<typename TKey>
struct HashFunctionInteger
{
  size_t operator()( const TKey x ) const
  { 
    return static_cast<size_t>( x ); 
  }
};
#endif // #ifdef __APPLE__

template<
  class TKey, 
  class TValue, 
#ifndef __APPLE__
  class THashFunc = HashFunctionInteger<TKey>
#else
  class THashFunc = __gnu_cxx::hash<TKey>
#endif
  >
class HashMapSTL : 
#if defined(__APPLE__)
    public __gnu_cxx::hash_map<TKey,TValue,THashFunc>
#elif defined(_MSC_VER)
    public std::tr1::unordered_map<TKey,TValue,THashFunc>
#elif defined(HAVE_UNORDERED_MAP)
    public std::unordered_map<TKey,TValue,THashFunc>
#elif defined(HAVE_UNORDERED_MAP_TR1)
    public std::tr1::unordered_map<TKey,TValue,THashFunc>
#elif defined(__GNUC__)
    public __gnu_cxx::hash_map<TKey,TValue,THashFunc>
#else
    public std::hash_map<TKey,TValue,THashFunc>
#endif
{
};

} // namespace cmtk

#endif // #ifdef HAVE_STL_HASH_MAP
#endif // #ifndef __cmtkHashMapSTL_h_included_