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Diffstat (limited to 'contrib/libstdc++/include/ext/stl_hash_fun.h')
-rw-r--r-- | contrib/libstdc++/include/ext/stl_hash_fun.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/contrib/libstdc++/include/ext/stl_hash_fun.h b/contrib/libstdc++/include/ext/stl_hash_fun.h new file mode 100644 index 0000000..562fe7a --- /dev/null +++ b/contrib/libstdc++/include/ext/stl_hash_fun.h @@ -0,0 +1,126 @@ +// 'struct hash' from SGI -*- C++ -*- + +// Copyright (C) 2001, 2002 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/stl_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 _CPP_BITS_STL_HASH_FUN_H +#define _CPP_BITS_STL_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 /* _CPP_BITS_STL_HASH_FUN_H */ + +// Local Variables: +// mode:C++ +// End: |