1// Components for manipulating non-owning sequences of characters -*- C++ -*-
2
3// Copyright (C) 2013-2018 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 include/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{string_view}
28 */
29
30//
31// N3762 basic_string_view library
32//
33
34#ifndef _GLIBCXX_STRING_VIEW_TCC
35#define _GLIBCXX_STRING_VIEW_TCC 1
36
37#pragma GCC system_header
38
39#if __cplusplus >= 201703L
40
41namespace std _GLIBCXX_VISIBILITY(default)
42{
43_GLIBCXX_BEGIN_NAMESPACE_VERSION
44
45 template<typename _CharT, typename _Traits>
46 constexpr typename basic_string_view<_CharT, _Traits>::size_type
47 basic_string_view<_CharT, _Traits>::
48 find(const _CharT* __str, size_type __pos, size_type __n) const noexcept
49 {
50 __glibcxx_requires_string_len(__str, __n);
51
52 if (__n == 0)
53 return __pos <= this->_M_len ? __pos : npos;
54
55 if (__n <= this->_M_len)
56 {
57 for (; __pos <= this->_M_len - __n; ++__pos)
58 if (traits_type::eq(this->_M_str[__pos], __str[0])
59 && traits_type::compare(this->_M_str + __pos + 1,
60 __str + 1, __n - 1) == 0)
61 return __pos;
62 }
63 return npos;
64 }
65
66 template<typename _CharT, typename _Traits>
67 constexpr typename basic_string_view<_CharT, _Traits>::size_type
68 basic_string_view<_CharT, _Traits>::
69 find(_CharT __c, size_type __pos) const noexcept
70 {
71 size_type __ret = npos;
72 if (__pos < this->_M_len)
73 {
74 const size_type __n = this->_M_len - __pos;
75 const _CharT* __p = traits_type::find(this->_M_str + __pos, __n, __c);
76 if (__p)
77 __ret = __p - this->_M_str;
78 }
79 return __ret;
80 }
81
82 template<typename _CharT, typename _Traits>
83 constexpr typename basic_string_view<_CharT, _Traits>::size_type
84 basic_string_view<_CharT, _Traits>::
85 rfind(const _CharT* __str, size_type __pos, size_type __n) const noexcept
86 {
87 __glibcxx_requires_string_len(__str, __n);
88
89 if (__n <= this->_M_len)
90 {
91 __pos = std::min(size_type(this->_M_len - __n), __pos);
92 do
93 {
94 if (traits_type::compare(this->_M_str + __pos, __str, __n) == 0)
95 return __pos;
96 }
97 while (__pos-- > 0);
98 }
99 return npos;
100 }
101
102 template<typename _CharT, typename _Traits>
103 constexpr typename basic_string_view<_CharT, _Traits>::size_type
104 basic_string_view<_CharT, _Traits>::
105 rfind(_CharT __c, size_type __pos) const noexcept
106 {
107 size_type __size = this->_M_len;
108 if (__size > 0)
109 {
110 if (--__size > __pos)
111 __size = __pos;
112 for (++__size; __size-- > 0; )
113 if (traits_type::eq(this->_M_str[__size], __c))
114 return __size;
115 }
116 return npos;
117 }
118
119 template<typename _CharT, typename _Traits>
120 constexpr typename basic_string_view<_CharT, _Traits>::size_type
121 basic_string_view<_CharT, _Traits>::
122 find_first_of(const _CharT* __str, size_type __pos,
123 size_type __n) const noexcept
124 {
125 __glibcxx_requires_string_len(__str, __n);
126 for (; __n && __pos < this->_M_len; ++__pos)
127 {
128 const _CharT* __p = traits_type::find(__str, __n,
129 this->_M_str[__pos]);
130 if (__p)
131 return __pos;
132 }
133 return npos;
134 }
135
136 template<typename _CharT, typename _Traits>
137 constexpr typename basic_string_view<_CharT, _Traits>::size_type
138 basic_string_view<_CharT, _Traits>::
139 find_last_of(const _CharT* __str, size_type __pos,
140 size_type __n) const noexcept
141 {
142 __glibcxx_requires_string_len(__str, __n);
143 size_type __size = this->size();
144 if (__size && __n)
145 {
146 if (--__size > __pos)
147 __size = __pos;
148 do
149 {
150 if (traits_type::find(__str, __n, this->_M_str[__size]))
151 return __size;
152 }
153 while (__size-- != 0);
154 }
155 return npos;
156 }
157
158 template<typename _CharT, typename _Traits>
159 constexpr typename basic_string_view<_CharT, _Traits>::size_type
160 basic_string_view<_CharT, _Traits>::
161 find_first_not_of(const _CharT* __str, size_type __pos,
162 size_type __n) const noexcept
163 {
164 __glibcxx_requires_string_len(__str, __n);
165 for (; __pos < this->_M_len; ++__pos)
166 if (!traits_type::find(__str, __n, this->_M_str[__pos]))
167 return __pos;
168 return npos;
169 }
170
171 template<typename _CharT, typename _Traits>
172 constexpr typename basic_string_view<_CharT, _Traits>::size_type
173 basic_string_view<_CharT, _Traits>::
174 find_first_not_of(_CharT __c, size_type __pos) const noexcept
175 {
176 for (; __pos < this->_M_len; ++__pos)
177 if (!traits_type::eq(this->_M_str[__pos], __c))
178 return __pos;
179 return npos;
180 }
181
182 template<typename _CharT, typename _Traits>
183 constexpr typename basic_string_view<_CharT, _Traits>::size_type
184 basic_string_view<_CharT, _Traits>::
185 find_last_not_of(const _CharT* __str, size_type __pos,
186 size_type __n) const noexcept
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
224_GLIBCXX_END_NAMESPACE_VERSION
225} // namespace std
226
227#endif // __cplusplus <= 201402L
228
229#endif // _GLIBCXX_STRING_VIEW_TCC
230