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 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 41 namespace std _GLIBCXX_VISIBILITY(default) 42 { 43 _GLIBCXX_BEGIN_NAMESPACE_VERSION 44 45 namespace experimental 46 { 47 inline 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>:: find(const _CharT * __str,size_type __pos,size_type __n) const52 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>:: find(_CharT __c,size_type __pos) const73 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>:: rfind(const _CharT * __str,size_type __pos,size_type __n) const89 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>:: rfind(_CharT __c,size_type __pos) const109 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>:: find_first_of(const _CharT * __str,size_type __pos,size_type __n) const126 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>:: find_last_of(const _CharT * __str,size_type __pos,size_type __n) const142 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>:: find_first_not_of(const _CharT * __str,size_type __pos,size_type __n) const163 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>:: find_first_not_of(_CharT __c,size_type __pos) const175 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>:: find_last_not_of(const _CharT * __str,size_type __pos,size_type __n) const186 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>:: find_last_not_of(_CharT __c,size_type __pos) const207 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 232