source: Daodan/MSYS2/mingw32/include/c++/11.2.0/experimental/bits/string_view.tcc@ 1181

Last change on this file since 1181 was 1166, checked in by rossy, 3 years ago

Daodan: Replace MinGW build env with an up-to-date MSYS2 env
File size: 6.7 KB
Line 
1// Components for manipulating non-owning sequences of characters -*- C++ -*-
2
3// Copyright (C) 2013-2021 Free Software Foundation, Inc.
4//
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
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
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.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25/** @file experimental/bits/string_view.tcc
26 * This is an internal header file, included by other library headers.
27 * Do not attempt to use it directly. @headername{experimental/string_view}
28 */
29
30//
31// N3762 basic_string_view library
32//
33
34#ifndef _GLIBCXX_EXPERIMENTAL_STRING_VIEW_TCC
35#define _GLIBCXX_EXPERIMENTAL_STRING_VIEW_TCC 1
36
37#pragma GCC system_header
38
39#if __cplusplus >= 201402L
40
41namespace std _GLIBCXX_VISIBILITY(default)
42{
43_GLIBCXX_BEGIN_NAMESPACE_VERSION
44
45namespace experimental
46{
47inline namespace fundamentals_v1
48{
49 template<typename _CharT, typename _Traits>
50 constexpr typename basic_string_view<_CharT, _Traits>::size_type
51 basic_string_view<_CharT, _Traits>::
52 find(const _CharT* __str, size_type __pos, size_type __n) const noexcept
53 {
54 __glibcxx_requires_string_len(__str, __n);
55
56 if (__n == 0)
57 return __pos <= this->_M_len ? __pos : npos;
58
59 if (__n <= this->_M_len)
60 {
61 for (; __pos <= this->_M_len - __n; ++__pos)
62 if (traits_type::eq(this->_M_str[__pos], __str[0])
63 && traits_type::compare(this->_M_str + __pos + 1,
64 __str + 1, __n - 1) == 0)
65 return __pos;
66 }
67 return npos;
68 }
69
70 template<typename _CharT, typename _Traits>
71 constexpr typename basic_string_view<_CharT, _Traits>::size_type
72 basic_string_view<_CharT, _Traits>::
73 find(_CharT __c, size_type __pos) const noexcept
74 {
75 size_type __ret = npos;
76 if (__pos < this->_M_len)
77 {
78 const size_type __n = this->_M_len - __pos;
79 const _CharT* __p = traits_type::find(this->_M_str + __pos, __n, __c);
80 if (__p)
81 __ret = __p - this->_M_str;
82 }
83 return __ret;
84 }
85
86 template<typename _CharT, typename _Traits>
87 constexpr typename basic_string_view<_CharT, _Traits>::size_type
88 basic_string_view<_CharT, _Traits>::
89 rfind(const _CharT* __str, size_type __pos, size_type __n) const noexcept
90 {
91 __glibcxx_requires_string_len(__str, __n);
92
93 if (__n <= this->_M_len)
94 {
95 __pos = std::min(size_type(this->_M_len - __n), __pos);
96 do
97 {
98 if (traits_type::compare(this->_M_str + __pos, __str, __n) == 0)
99 return __pos;
100 }
101 while (__pos-- > 0);
102 }
103 return npos;
104 }
105
106 template<typename _CharT, typename _Traits>
107 constexpr typename basic_string_view<_CharT, _Traits>::size_type
108 basic_string_view<_CharT, _Traits>::
109 rfind(_CharT __c, size_type __pos) const noexcept
110 {
111 size_type __size = this->_M_len;
112 if (__size > 0)
113 {
114 if (--__size > __pos)
115 __size = __pos;
116 for (++__size; __size-- > 0; )
117 if (traits_type::eq(this->_M_str[__size], __c))
118 return __size;
119 }
120 return npos;
121 }
122
123 template<typename _CharT, typename _Traits>
124 constexpr typename basic_string_view<_CharT, _Traits>::size_type
125 basic_string_view<_CharT, _Traits>::
126 find_first_of(const _CharT* __str, size_type __pos, size_type __n) const
127 {
128 __glibcxx_requires_string_len(__str, __n);
129 for (; __n && __pos < this->_M_len; ++__pos)
130 {
131 const _CharT* __p = traits_type::find(__str, __n,
132 this->_M_str[__pos]);
133 if (__p)
134 return __pos;
135 }
136 return npos;
137 }
138
139 template<typename _CharT, typename _Traits>
140 constexpr typename basic_string_view<_CharT, _Traits>::size_type
141 basic_string_view<_CharT, _Traits>::
142 find_last_of(const _CharT* __str, size_type __pos, size_type __n) const
143 {
144 __glibcxx_requires_string_len(__str, __n);
145 size_type __size = this->size();
146 if (__size && __n)
147 {
148 if (--__size > __pos)
149 __size = __pos;
150 do
151 {
152 if (traits_type::find(__str, __n, this->_M_str[__size]))
153 return __size;
154 }
155 while (__size-- != 0);
156 }
157 return npos;
158 }
159
160 template<typename _CharT, typename _Traits>
161 constexpr typename basic_string_view<_CharT, _Traits>::size_type
162 basic_string_view<_CharT, _Traits>::
163 find_first_not_of(const _CharT* __str, size_type __pos, size_type __n) const
164 {
165 __glibcxx_requires_string_len(__str, __n);
166 for (; __pos < this->_M_len; ++__pos)
167 if (!traits_type::find(__str, __n, this->_M_str[__pos]))
168 return __pos;
169 return npos;
170 }
171
172 template<typename _CharT, typename _Traits>
173 constexpr typename basic_string_view<_CharT, _Traits>::size_type
174 basic_string_view<_CharT, _Traits>::
175 find_first_not_of(_CharT __c, size_type __pos) const noexcept
176 {
177 for (; __pos < this->_M_len; ++__pos)
178 if (!traits_type::eq(this->_M_str[__pos], __c))
179 return __pos;
180 return npos;
181 }
182
183 template<typename _CharT, typename _Traits>
184 constexpr typename basic_string_view<_CharT, _Traits>::size_type
185 basic_string_view<_CharT, _Traits>::
186 find_last_not_of(const _CharT* __str, size_type __pos, size_type __n) const
187 {
188 __glibcxx_requires_string_len(__str, __n);
189 size_type __size = this->_M_len;
190 if (__size)
191 {
192 if (--__size > __pos)
193 __size = __pos;
194 do
195 {
196 if (!traits_type::find(__str, __n, this->_M_str[__size]))
197 return __size;
198 }
199 while (__size--);
200 }
201 return npos;
202 }
203
204 template<typename _CharT, typename _Traits>
205 constexpr typename basic_string_view<_CharT, _Traits>::size_type
206 basic_string_view<_CharT, _Traits>::
207 find_last_not_of(_CharT __c, size_type __pos) const noexcept
208 {
209 size_type __size = this->_M_len;
210 if (__size)
211 {
212 if (--__size > __pos)
213 __size = __pos;
214 do
215 {
216 if (!traits_type::eq(this->_M_str[__size], __c))
217 return __size;
218 }
219 while (__size--);
220 }
221 return npos;
222 }
223} // namespace fundamentals_v1
224} // namespace experimental
225
226_GLIBCXX_END_NAMESPACE_VERSION
227} // namespace std
228
229#endif // __cplusplus <= 201103L
230
231#endif // _GLIBCXX_EXPERIMENTAL_STRING_VIEW_TCC
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