hash_fun.hxx.in 3.96 KB
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/*============================================================================
  KWSys - Kitware System Library
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.
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  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
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/*
 * Copyright (c) 1996
 * Silicon Graphics Computer Systems, Inc.
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Silicon Graphics makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 *
 * Copyright (c) 1994
 * Hewlett-Packard Company
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Hewlett-Packard Company makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 */
#ifndef @KWSYS_NAMESPACE@_hash_fun_hxx
#define @KWSYS_NAMESPACE@_hash_fun_hxx

#include <@KWSYS_NAMESPACE@/Configure.hxx>
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#include <stddef.h> // size_t
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#include <string>
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namespace @KWSYS_NAMESPACE@
{

template <class _Key> struct hash { };

inline size_t _stl_hash_string(const char* __s)
{
  unsigned long __h = 0;
  for ( ; *__s; ++__s)
    __h = 5*__h + *__s;

  return size_t(__h);
}

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template <>
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struct hash<char*> {
  size_t operator()(const char* __s) const { return _stl_hash_string(__s); }
};

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template <>
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struct hash<const char*> {
  size_t operator()(const char* __s) const { return _stl_hash_string(__s); }
};

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template <>
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  struct hash<std::string> {
  size_t operator()(const std::string & __s) const { return _stl_hash_string(__s.c_str()); }
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};

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#if !defined(__BORLANDC__)
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template <>
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  struct hash<const std::string> {
  size_t operator()(const std::string & __s) const { return _stl_hash_string(__s.c_str()); }
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};
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#endif
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template <>
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struct hash<char> {
  size_t operator()(char __x) const { return __x; }
};

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template <>
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struct hash<unsigned char> {
  size_t operator()(unsigned char __x) const { return __x; }
};

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template <>
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struct hash<signed char> {
  size_t operator()(unsigned char __x) const { return __x; }
};

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template <>
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struct hash<short> {
  size_t operator()(short __x) const { return __x; }
};

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template <>
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struct hash<unsigned short> {
  size_t operator()(unsigned short __x) const { return __x; }
};

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template <>
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struct hash<int> {
  size_t operator()(int __x) const { return __x; }
};

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template <>
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struct hash<unsigned int> {
  size_t operator()(unsigned int __x) const { return __x; }
};

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template <>
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struct hash<long> {
  size_t operator()(long __x) const { return __x; }
};

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template <>
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struct hash<unsigned long> {
  size_t operator()(unsigned long __x) const { return __x; }
};

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// use long long or __int64
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#if @KWSYS_USE_LONG_LONG@
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template <>
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struct hash<long long> {
  size_t operator()(long long __x) const { return __x; }
};

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template <>
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struct hash<unsigned long long> {
  size_t operator()(unsigned long long __x) const { return __x; }
};
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#elif @KWSYS_USE___INT64@
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template <>
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struct hash<__int64> {
  size_t operator()(__int64 __x) const { return __x; }
};
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template <>
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struct hash<unsigned __int64> {
  size_t operator()(unsigned __int64 __x) const { return __x; }
};
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#endif // use long long or __int64
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} // namespace @KWSYS_NAMESPACE@

#endif