| 1 | // Components for manipulating non-owning sequences of characters -*- C++ -*- |
| 2 | |
| 3 | // Note: This file has been stolen from the gcc repo |
| 4 | // (libstdc++-v3/include/experimental/bits/string_view.tcc) and has local |
| 5 | // modifications. |
| 6 | |
| 7 | // Copyright (C) 2013-2020 Free Software Foundation, Inc. |
| 8 | // |
| 9 | // This file is part of the GNU ISO C++ Library. This library is free |
| 10 | // software; you can redistribute it and/or modify it under the |
| 11 | // terms of the GNU General Public License as published by the |
| 12 | // Free Software Foundation; either version 3, or (at your option) |
| 13 | // any later version. |
| 14 | |
| 15 | // This library is distributed in the hope that it will be useful, |
| 16 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | // GNU General Public License for more details. |
| 19 | |
| 20 | // Under Section 7 of GPL version 3, you are granted additional |
| 21 | // permissions described in the GCC Runtime Library Exception, version |
| 22 | // 3.1, as published by the Free Software Foundation. |
| 23 | |
| 24 | // You should have received a copy of the GNU General Public License and |
| 25 | // a copy of the GCC Runtime Library Exception along with this program; |
| 26 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| 27 | // <http://www.gnu.org/licenses/>. |
| 28 | |
| 29 | /** @file experimental/bits/string_view.tcc |
| 30 | * This is an internal header file, included by other library headers. |
| 31 | * Do not attempt to use it directly. @headername{experimental/string_view} |
| 32 | */ |
| 33 | |
| 34 | // |
| 35 | // N3762 basic_string_view library |
| 36 | // |
| 37 | |
| 38 | #ifndef GDB_STRING_VIEW_TCC |
| 39 | #define GDB_STRING_VIEW_TCC 1 |
| 40 | |
| 41 | namespace gdb |
| 42 | { |
| 43 | template<typename _CharT, typename _Traits> |
| 44 | /*constexpr*/ typename basic_string_view<_CharT, _Traits>::size_type |
| 45 | basic_string_view<_CharT, _Traits>:: |
| 46 | find(const _CharT* __str, size_type __pos, size_type __n) const noexcept |
| 47 | { |
| 48 | gdb_assert (__str != nullptr || __n == 0); |
| 49 | |
| 50 | if (__n == 0) |
| 51 | return __pos <= this->_M_len ? __pos : npos; |
| 52 | |
| 53 | if (__n <= this->_M_len) |
| 54 | { |
| 55 | for (; __pos <= this->_M_len - __n; ++__pos) |
| 56 | if (traits_type::eq(this->_M_str[__pos], __str[0]) |
| 57 | && traits_type::compare(this->_M_str + __pos + 1, |
| 58 | __str + 1, __n - 1) == 0) |
| 59 | return __pos; |
| 60 | } |
| 61 | return npos; |
| 62 | } |
| 63 | |
| 64 | template<typename _CharT, typename _Traits> |
| 65 | /*constexpr*/ typename basic_string_view<_CharT, _Traits>::size_type |
| 66 | basic_string_view<_CharT, _Traits>:: |
| 67 | find(_CharT __c, size_type __pos) const noexcept |
| 68 | { |
| 69 | size_type __ret = npos; |
| 70 | if (__pos < this->_M_len) |
| 71 | { |
| 72 | const size_type __n = this->_M_len - __pos; |
| 73 | const _CharT* __p = traits_type::find(this->_M_str + __pos, __n, __c); |
| 74 | if (__p) |
| 75 | __ret = __p - this->_M_str; |
| 76 | } |
| 77 | return __ret; |
| 78 | } |
| 79 | |
| 80 | template<typename _CharT, typename _Traits> |
| 81 | /*constexpr*/ typename basic_string_view<_CharT, _Traits>::size_type |
| 82 | basic_string_view<_CharT, _Traits>:: |
| 83 | rfind(const _CharT* __str, size_type __pos, size_type __n) const noexcept |
| 84 | { |
| 85 | gdb_assert (__str != nullptr || __n == 0); |
| 86 | |
| 87 | if (__n <= this->_M_len) |
| 88 | { |
| 89 | __pos = std::min(size_type(this->_M_len - __n), __pos); |
| 90 | do |
| 91 | { |
| 92 | if (traits_type::compare(this->_M_str + __pos, __str, __n) == 0) |
| 93 | return __pos; |
| 94 | } |
| 95 | while (__pos-- > 0); |
| 96 | } |
| 97 | return npos; |
| 98 | } |
| 99 | |
| 100 | template<typename _CharT, typename _Traits> |
| 101 | /*constexpr*/ typename basic_string_view<_CharT, _Traits>::size_type |
| 102 | basic_string_view<_CharT, _Traits>:: |
| 103 | rfind(_CharT __c, size_type __pos) const noexcept |
| 104 | { |
| 105 | size_type __size = this->_M_len; |
| 106 | if (__size > 0) |
| 107 | { |
| 108 | if (--__size > __pos) |
| 109 | __size = __pos; |
| 110 | for (++__size; __size-- > 0; ) |
| 111 | if (traits_type::eq(this->_M_str[__size], __c)) |
| 112 | return __size; |
| 113 | } |
| 114 | return npos; |
| 115 | } |
| 116 | |
| 117 | template<typename _CharT, typename _Traits> |
| 118 | /*constexpr*/ typename basic_string_view<_CharT, _Traits>::size_type |
| 119 | basic_string_view<_CharT, _Traits>:: |
| 120 | find_first_of(const _CharT* __str, size_type __pos, size_type __n) const |
| 121 | { |
| 122 | gdb_assert (__str != nullptr || __n == 0); |
| 123 | for (; __n && __pos < this->_M_len; ++__pos) |
| 124 | { |
| 125 | const _CharT* __p = traits_type::find(__str, __n, |
| 126 | this->_M_str[__pos]); |
| 127 | if (__p) |
| 128 | return __pos; |
| 129 | } |
| 130 | return npos; |
| 131 | } |
| 132 | |
| 133 | template<typename _CharT, typename _Traits> |
| 134 | /*constexpr*/ typename basic_string_view<_CharT, _Traits>::size_type |
| 135 | basic_string_view<_CharT, _Traits>:: |
| 136 | find_last_of(const _CharT* __str, size_type __pos, size_type __n) const |
| 137 | { |
| 138 | gdb_assert (__str != nullptr || __n == 0); |
| 139 | size_type __size = this->size(); |
| 140 | if (__size && __n) |
| 141 | { |
| 142 | if (--__size > __pos) |
| 143 | __size = __pos; |
| 144 | do |
| 145 | { |
| 146 | if (traits_type::find(__str, __n, this->_M_str[__size])) |
| 147 | return __size; |
| 148 | } |
| 149 | while (__size-- != 0); |
| 150 | } |
| 151 | return npos; |
| 152 | } |
| 153 | |
| 154 | template<typename _CharT, typename _Traits> |
| 155 | /*constexpr*/ typename basic_string_view<_CharT, _Traits>::size_type |
| 156 | basic_string_view<_CharT, _Traits>:: |
| 157 | find_first_not_of(const _CharT* __str, size_type __pos, size_type __n) const |
| 158 | { |
| 159 | gdb_assert (__str != nullptr || __n == 0); |
| 160 | for (; __pos < this->_M_len; ++__pos) |
| 161 | if (!traits_type::find(__str, __n, this->_M_str[__pos])) |
| 162 | return __pos; |
| 163 | return npos; |
| 164 | } |
| 165 | |
| 166 | template<typename _CharT, typename _Traits> |
| 167 | /*constexpr*/ typename basic_string_view<_CharT, _Traits>::size_type |
| 168 | basic_string_view<_CharT, _Traits>:: |
| 169 | find_first_not_of(_CharT __c, size_type __pos) const noexcept |
| 170 | { |
| 171 | for (; __pos < this->_M_len; ++__pos) |
| 172 | if (!traits_type::eq(this->_M_str[__pos], __c)) |
| 173 | return __pos; |
| 174 | return npos; |
| 175 | } |
| 176 | |
| 177 | template<typename _CharT, typename _Traits> |
| 178 | /*constexpr*/ typename basic_string_view<_CharT, _Traits>::size_type |
| 179 | basic_string_view<_CharT, _Traits>:: |
| 180 | find_last_not_of(const _CharT* __str, size_type __pos, size_type __n) const |
| 181 | { |
| 182 | gdb_assert (__str != nullptr || __n == 0); |
| 183 | size_type __size = this->_M_len; |
| 184 | if (__size) |
| 185 | { |
| 186 | if (--__size > __pos) |
| 187 | __size = __pos; |
| 188 | do |
| 189 | { |
| 190 | if (!traits_type::find(__str, __n, this->_M_str[__size])) |
| 191 | return __size; |
| 192 | } |
| 193 | while (__size--); |
| 194 | } |
| 195 | return npos; |
| 196 | } |
| 197 | |
| 198 | template<typename _CharT, typename _Traits> |
| 199 | /*constexpr*/ typename basic_string_view<_CharT, _Traits>::size_type |
| 200 | basic_string_view<_CharT, _Traits>:: |
| 201 | find_last_not_of(_CharT __c, size_type __pos) const noexcept |
| 202 | { |
| 203 | size_type __size = this->_M_len; |
| 204 | if (__size) |
| 205 | { |
| 206 | if (--__size > __pos) |
| 207 | __size = __pos; |
| 208 | do |
| 209 | { |
| 210 | if (!traits_type::eq(this->_M_str[__size], __c)) |
| 211 | return __size; |
| 212 | } |
| 213 | while (__size--); |
| 214 | } |
| 215 | return npos; |
| 216 | } |
| 217 | } // namespace gdb |
| 218 | |
| 219 | #endif // GDB_STRING_VIEW_TCC |