// '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. * */ /** @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). */ #ifndef _HASH_FUN_H #define _HASH_FUN_H 1 #include <cstddef> _GLIBCXX_BEGIN_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; } }; _GLIBCXX_END_NAMESPACE #endif