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/*
//
// Copyright 1997-2009 Torsten Rohlfing
//
// Copyright 2009, 2012 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: 5436 $
//
// $LastChangedDate: 2018-12-10 19:01:20 -0800 (Mon, 10 Dec 2018) $
//
// $LastChangedBy: torstenrohlfing $
//
*/
#ifndef __cmtkHashMapSTL_h_included_
#define __cmtkHashMapSTL_h_included_
#include <cmtkconfig.h>
#define HAVE_STL_HASH_MAP
#if defined(HAVE_UNORDERED_MAP)
# include <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 HAVE_STL_HASH_MAP
namespace
cmtk
{
/// Generic hash function for all integer types.
template<typename TKey>
struct HashFunctionInteger
{
/// Simply cast integer key to size_t
size_t operator()( const TKey x ) const
{
return static_cast<size_t>( x );
}
};
/** Wrapper class for STL hash_map or unordered_map classes.
* This class will use whatever hash map implementation is provided by the
* currently used STL. If both unordered_map and hash_map are provided, the
* former is used as it is the future standard class.
*/
template<
class TKey,
class TValue,
class THashFunc = HashFunctionInteger<TKey>
>
class HashMapSTL :
/// Inherit STL hash/unordered map.
#if 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(__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_
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