hash_fun.h
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// 'struct hash' from SGI -*- C++ -*-
// Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library 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, 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 General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
/*
* Copyright (c) 1996-1998
* 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 _HASH_FUN_H
#define _HASH_FUN_H 1
#include <cstddef>
#include <string>
namespace __gnu_cxx {
using std::size_t;
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);
}
template<>
struct hash<char*>
{
size_t
operator()(const char* __s) const
{ return __stl_hash_string(__s); }
};
template<>
struct hash<const char*>
{
size_t
operator()(const char* __s) const
{ return __stl_hash_string(__s); }
};
template<>
struct hash<string>
{
size_t
operator()(const string& str) const
{ return __stl_hash_string(str.c_str()); }
};
template<>
struct hash<char>
{
size_t
operator()(char __x) const
{ return __x; }
};
template<>
struct hash<unsigned char>
{
size_t
operator()(unsigned char __x) const
{ return __x; }
};
template<>
struct hash<signed char>
{
size_t
operator()(unsigned char __x) const
{ return __x; }
};
template<>
struct hash<short>
{
size_t
operator()(short __x) const
{ return __x; }
};
template<>
struct hash<unsigned short>
{
size_t
operator()(unsigned short __x) const
{ return __x; }
};
template<>
struct hash<int>
{
size_t
operator()(int __x) const
{ return __x; }
};
template<>
struct hash<unsigned int>
{
size_t
operator()(unsigned int __x) const
{ return __x; }
};
template<>
struct hash<long>
{
size_t
operator()(long __x) const
{ return __x; }
};
template<>
struct hash<unsigned long>
{
size_t
operator()(unsigned long __x) const
{ return __x; }
};
}
#endif
__gnu_cxx
This file is a GNU extension to the Standard C++ Library (possibly containing extensions from the HP/...
Definition hash_fun.h:67
__gnu_cxx::__stl_hash_string
size_t __stl_hash_string(const char *__s)
Definition hash_fun.h:74
__gnu_cxx::hash< char >::operator()
size_t operator()(char __x) const
Definition hash_fun.h:110
__gnu_cxx::hash< char * >::operator()
size_t operator()(const char *__s) const
Definition hash_fun.h:86
__gnu_cxx::hash< const char * >::operator()
size_t operator()(const char *__s) const
Definition hash_fun.h:94
__gnu_cxx::hash< int >::operator()
size_t operator()(int __x) const
Definition hash_fun.h:150
__gnu_cxx::hash< long >::operator()
size_t operator()(long __x) const
Definition hash_fun.h:166
__gnu_cxx::hash< short >::operator()
size_t operator()(short __x) const
Definition hash_fun.h:134
__gnu_cxx::hash< signed char >::operator()
size_t operator()(unsigned char __x) const
Definition hash_fun.h:126
__gnu_cxx::hash< string >::operator()
size_t operator()(const string &str) const
Definition hash_fun.h:102
__gnu_cxx::hash< unsigned char >::operator()
size_t operator()(unsigned char __x) const
Definition hash_fun.h:118
__gnu_cxx::hash< unsigned int >::operator()
size_t operator()(unsigned int __x) const
Definition hash_fun.h:158
__gnu_cxx::hash< unsigned long >::operator()
size_t operator()(unsigned long __x) const
Definition hash_fun.h:174
__gnu_cxx::hash< unsigned short >::operator()
size_t operator()(unsigned short __x) const
Definition hash_fun.h:142
__gnu_cxx::hash
Definition hash_fun.h:71