1/*
2 * Copyright (c) 1996-1998
3 * Silicon Graphics Computer Systems, Inc.
4 *
5 * Permission to use, copy, modify, distribute and sell this software
6 * and its documentation for any purpose is hereby granted without fee,
7 * provided that the above copyright notice appear in all copies and
8 * that both that copyright notice and this permission notice appear
9 * in supporting documentation.  Silicon Graphics makes no
10 * representations about the suitability of this software for any
11 * purpose.  It is provided "as is" without express or implied warranty.
12 *
13 *
14 * Copyright (c) 1994
15 * Hewlett-Packard Company
16 *
17 * Permission to use, copy, modify, distribute and sell this software
18 * and its documentation for any purpose is hereby granted without fee,
19 * provided that the above copyright notice appear in all copies and
20 * that both that copyright notice and this permission notice appear
21 * in supporting documentation.  Hewlett-Packard Company makes no
22 * representations about the suitability of this software for any
23 * purpose.  It is provided "as is" without express or implied warranty.
24 *
25 */
26
27/* NOTE: This is an internal header file, included by other STL headers.
28 *   You should not attempt to use it directly.
29 */
30
31#ifndef __SGI_STL_HASH_FUN_H
32#define __SGI_STL_HASH_FUN_H
33
34#include <stddef.h>
35
36__STL_BEGIN_NAMESPACE
37
38template <class _Key> struct hash { };
39
40inline size_t __stl_hash_string(const char* __s)
41{
42  unsigned long __h = 0;
43  for ( ; *__s; ++__s)
44    __h = 5*__h + *__s;
45
46  return size_t(__h);
47}
48
49__STL_TEMPLATE_NULL struct hash<char*>
50{
51  size_t operator()(const char* __s) const { return __stl_hash_string(__s); }
52};
53
54__STL_TEMPLATE_NULL struct hash<const char*>
55{
56  size_t operator()(const char* __s) const { return __stl_hash_string(__s); }
57};
58
59__STL_TEMPLATE_NULL struct hash<char> {
60  size_t operator()(char __x) const { return __x; }
61};
62__STL_TEMPLATE_NULL struct hash<unsigned char> {
63  size_t operator()(unsigned char __x) const { return __x; }
64};
65__STL_TEMPLATE_NULL struct hash<signed char> {
66  size_t operator()(unsigned char __x) const { return __x; }
67};
68__STL_TEMPLATE_NULL struct hash<short> {
69  size_t operator()(short __x) const { return __x; }
70};
71__STL_TEMPLATE_NULL struct hash<unsigned short> {
72  size_t operator()(unsigned short __x) const { return __x; }
73};
74__STL_TEMPLATE_NULL struct hash<int> {
75  size_t operator()(int __x) const { return __x; }
76};
77__STL_TEMPLATE_NULL struct hash<unsigned int> {
78  size_t operator()(unsigned int __x) const { return __x; }
79};
80__STL_TEMPLATE_NULL struct hash<long> {
81  size_t operator()(long __x) const { return __x; }
82};
83__STL_TEMPLATE_NULL struct hash<unsigned long> {
84  size_t operator()(unsigned long __x) const { return __x; }
85};
86
87__STL_END_NAMESPACE
88
89#endif /* __SGI_STL_HASH_FUN_H */
90
91// Local Variables:
92// mode:C++
93// End:
94