123 lines
4.2 KiB
C++
123 lines
4.2 KiB
C++
// 'struct hash' from SGI -*- C++ -*-
|
|
|
|
// Copyright (C) 2001, 2002, 2003 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
|
|
// 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.
|
|
*
|
|
*/
|
|
|
|
/** @file ext/hash_fun.h
|
|
* This file is a GNU extension to the Standard C++ Library (possibly
|
|
* containing extensions from the HP/SGI STL subset). You should only
|
|
* include this header if you are using GCC 3 or later.
|
|
*/
|
|
|
|
#ifndef _HASH_FUN_H
|
|
#define _HASH_FUN_H 1
|
|
|
|
#include <cstddef>
|
|
|
|
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<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; } };
|
|
} // namespace __gnu_cxx
|
|
|
|
#endif
|