__hash revision 1.1 1 // -*- C++ -*-
2 //===------------------------- hash_set ------------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9
10 #ifndef _LIBCPP_EXT_HASH
11 #define _LIBCPP_EXT_HASH
12
13 #pragma GCC system_header
14
15 #include <string>
16 #include <cstring>
17
18 namespace __gnu_cxx {
19
20 template <typename _Tp> struct _LIBCPP_TEMPLATE_VIS hash { };
21
22 template <> struct _LIBCPP_TEMPLATE_VIS hash<const char*>
23 : public std::unary_function<const char*, size_t>
24 {
25 _LIBCPP_INLINE_VISIBILITY
26 size_t operator()(const char *__c) const _NOEXCEPT
27 {
28 return std::__do_string_hash(__c, __c + strlen(__c));
29 }
30 };
31
32 template <> struct _LIBCPP_TEMPLATE_VIS hash<char *>
33 : public std::unary_function<char*, size_t>
34 {
35 _LIBCPP_INLINE_VISIBILITY
36 size_t operator()(char *__c) const _NOEXCEPT
37 {
38 return std::__do_string_hash<const char *>(__c, __c + strlen(__c));
39 }
40 };
41
42 template <> struct _LIBCPP_TEMPLATE_VIS hash<char>
43 : public std::unary_function<char, size_t>
44 {
45 _LIBCPP_INLINE_VISIBILITY
46 size_t operator()(char __c) const _NOEXCEPT
47 {
48 return __c;
49 }
50 };
51
52 template <> struct _LIBCPP_TEMPLATE_VIS hash<signed char>
53 : public std::unary_function<signed char, size_t>
54 {
55 _LIBCPP_INLINE_VISIBILITY
56 size_t operator()(signed char __c) const _NOEXCEPT
57 {
58 return __c;
59 }
60 };
61
62 template <> struct _LIBCPP_TEMPLATE_VIS hash<unsigned char>
63 : public std::unary_function<unsigned char, size_t>
64 {
65 _LIBCPP_INLINE_VISIBILITY
66 size_t operator()(unsigned char __c) const _NOEXCEPT
67 {
68 return __c;
69 }
70 };
71
72 template <> struct _LIBCPP_TEMPLATE_VIS hash<short>
73 : public std::unary_function<short, size_t>
74 {
75 _LIBCPP_INLINE_VISIBILITY
76 size_t operator()(short __c) const _NOEXCEPT
77 {
78 return __c;
79 }
80 };
81
82 template <> struct _LIBCPP_TEMPLATE_VIS hash<unsigned short>
83 : public std::unary_function<unsigned short, size_t>
84 {
85 _LIBCPP_INLINE_VISIBILITY
86 size_t operator()(unsigned short __c) const _NOEXCEPT
87 {
88 return __c;
89 }
90 };
91
92 template <> struct _LIBCPP_TEMPLATE_VIS hash<int>
93 : public std::unary_function<int, size_t>
94 {
95 _LIBCPP_INLINE_VISIBILITY
96 size_t operator()(int __c) const _NOEXCEPT
97 {
98 return __c;
99 }
100 };
101
102 template <> struct _LIBCPP_TEMPLATE_VIS hash<unsigned int>
103 : public std::unary_function<unsigned int, size_t>
104 {
105 _LIBCPP_INLINE_VISIBILITY
106 size_t operator()(unsigned int __c) const _NOEXCEPT
107 {
108 return __c;
109 }
110 };
111
112 template <> struct _LIBCPP_TEMPLATE_VIS hash<long>
113 : public std::unary_function<long, size_t>
114 {
115 _LIBCPP_INLINE_VISIBILITY
116 size_t operator()(long __c) const _NOEXCEPT
117 {
118 return __c;
119 }
120 };
121
122 template <> struct _LIBCPP_TEMPLATE_VIS hash<unsigned long>
123 : public std::unary_function<unsigned long, size_t>
124 {
125 _LIBCPP_INLINE_VISIBILITY
126 size_t operator()(unsigned long __c) const _NOEXCEPT
127 {
128 return __c;
129 }
130 };
131 }
132
133 #endif // _LIBCPP_EXT_HASH
134