1 // 'struct hash' from SGI -*- C++ -*-
3 // Copyright (C) 2001 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
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11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
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28 // the GNU General Public License.
31 * Copyright (c) 1996-1998
32 * Silicon Graphics Computer Systems, Inc.
34 * Permission to use, copy, modify, distribute and sell this software
35 * and its documentation for any purpose is hereby granted without fee,
36 * provided that the above copyright notice appear in all copies and
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38 * in supporting documentation. Silicon Graphics makes no
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40 * purpose. It is provided "as is" without express or implied warranty.
44 * Hewlett-Packard Company
46 * Permission to use, copy, modify, distribute and sell this software
47 * and its documentation for any purpose is hereby granted without fee,
48 * provided that the above copyright notice appear in all copies and
49 * that both that copyright notice and this permission notice appear
50 * in supporting documentation. Hewlett-Packard Company makes no
51 * representations about the suitability of this software for any
52 * purpose. It is provided "as is" without express or implied warranty.
56 /** @file stl_hash_fun.h
57 * This is an internal header file, included by other library headers.
58 * You should not attempt to use it directly.
61 #ifndef _CPP_BITS_STL_HASH_FUN_H
62 #define _CPP_BITS_STL_HASH_FUN_H 1
64 #include <bits/std_cstddef.h>
69 template <class _Key> struct hash { };
71 inline size_t __stl_hash_string(const char* __s)
73 unsigned long __h = 0;
80 template<> struct hash<char*>
82 size_t operator()(const char* __s) const { return __stl_hash_string(__s); }
85 template<> struct hash<const char*>
87 size_t operator()(const char* __s) const { return __stl_hash_string(__s); }
90 template<> struct hash<char> {
91 size_t operator()(char __x) const { return __x; }
93 template<> struct hash<unsigned char> {
94 size_t operator()(unsigned char __x) const { return __x; }
96 template<> struct hash<signed char> {
97 size_t operator()(unsigned char __x) const { return __x; }
99 template<> struct hash<short> {
100 size_t operator()(short __x) const { return __x; }
102 template<> struct hash<unsigned short> {
103 size_t operator()(unsigned short __x) const { return __x; }
105 template<> struct hash<int> {
106 size_t operator()(int __x) const { return __x; }
108 template<> struct hash<unsigned int> {
109 size_t operator()(unsigned int __x) const { return __x; }
111 template<> struct hash<long> {
112 size_t operator()(long __x) const { return __x; }
114 template<> struct hash<unsigned long> {
115 size_t operator()(unsigned long __x) const { return __x; }
120 #endif /* _CPP_BITS_STL_HASH_FUN_H */