| 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>:: |
| 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 |