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 41 namespace 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