// Components for manipulating non-owning sequences of characters -*- C++ -*- // Copyright (C) 2013-2021 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** @file include/bits/string_view.tcc * This is an internal header file, included by other library headers. * Do not attempt to use it directly. @headername{string_view} */ // // N3762 basic_string_view library // #ifndef _GLIBCXX_STRING_VIEW_TCC #define _GLIBCXX_STRING_VIEW_TCC 1 #pragma GCC system_header #if __cplusplus >= 201703L namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _CharT, typename _Traits> constexpr typename basic_string_view<_CharT, _Traits>::size_type basic_string_view<_CharT, _Traits>:: find(const _CharT* __str, size_type __pos, size_type __n) const noexcept { __glibcxx_requires_string_len(__str, __n); if (__n == 0) return __pos <= _M_len ? __pos : npos; if (__pos >= _M_len) return npos; const _CharT __elem0 = __str[0]; const _CharT* __first = _M_str + __pos; const _CharT* const __last = _M_str + _M_len; size_type __len = _M_len - __pos; while (__len >= __n) { // Find the first occurrence of __elem0: __first = traits_type::find(__first, __len - __n + 1, __elem0); if (!__first) return npos; // Compare the full strings from the first occurrence of __elem0. // We already know that __first[0] == __s[0] but compare them again // anyway because __s is probably aligned, which helps memcmp. if (traits_type::compare(__first, __str, __n) == 0) return __first - _M_str; __len = __last - ++__first; } return npos; } template<typename _CharT, typename _Traits> constexpr typename basic_string_view<_CharT, _Traits>::size_type basic_string_view<_CharT, _Traits>:: find(_CharT __c, size_type __pos) const noexcept { size_type __ret = npos; if (__pos < this->_M_len) { const size_type __n = this->_M_len - __pos; const _CharT* __p = traits_type::find(this->_M_str + __pos, __n, __c); if (__p) __ret = __p - this->_M_str; } return __ret; } template<typename _CharT, typename _Traits> constexpr typename basic_string_view<_CharT, _Traits>::size_type basic_string_view<_CharT, _Traits>:: rfind(const _CharT* __str, size_type __pos, size_type __n) const noexcept { __glibcxx_requires_string_len(__str, __n); if (__n <= this->_M_len) { __pos = std::min(size_type(this->_M_len - __n), __pos); do { if (traits_type::compare(this->_M_str + __pos, __str, __n) == 0) return __pos; } while (__pos-- > 0); } return npos; } template<typename _CharT, typename _Traits> constexpr typename basic_string_view<_CharT, _Traits>::size_type basic_string_view<_CharT, _Traits>:: rfind(_CharT __c, size_type __pos) const noexcept { size_type __size = this->_M_len; if (__size > 0) { if (--__size > __pos) __size = __pos; for (++__size; __size-- > 0; ) if (traits_type::eq(this->_M_str[__size], __c)) return __size; } return npos; } template<typename _CharT, typename _Traits> constexpr typename basic_string_view<_CharT, _Traits>::size_type basic_string_view<_CharT, _Traits>:: find_first_of(const _CharT* __str, size_type __pos, size_type __n) const noexcept { __glibcxx_requires_string_len(__str, __n); for (; __n && __pos < this->_M_len; ++__pos) { const _CharT* __p = traits_type::find(__str, __n, this->_M_str[__pos]); if (__p) return __pos; } return npos; } template<typename _CharT, typename _Traits> constexpr typename basic_string_view<_CharT, _Traits>::size_type basic_string_view<_CharT, _Traits>:: find_last_of(const _CharT* __str, size_type __pos, size_type __n) const noexcept { __glibcxx_requires_string_len(__str, __n); size_type __size = this->size(); if (__size && __n) { if (--__size > __pos) __size = __pos; do { if (traits_type::find(__str, __n, this->_M_str[__size])) return __size; } while (__size-- != 0); } return npos; } template<typename _CharT, typename _Traits> constexpr typename basic_string_view<_CharT, _Traits>::size_type basic_string_view<_CharT, _Traits>:: find_first_not_of(const _CharT* __str, size_type __pos, size_type __n) const noexcept { __glibcxx_requires_string_len(__str, __n); for (; __pos < this->_M_len; ++__pos) if (!traits_type::find(__str, __n, this->_M_str[__pos])) return __pos; return npos; } template<typename _CharT, typename _Traits> constexpr typename basic_string_view<_CharT, _Traits>::size_type basic_string_view<_CharT, _Traits>:: find_first_not_of(_CharT __c, size_type __pos) const noexcept { for (; __pos < this->_M_len; ++__pos) if (!traits_type::eq(this->_M_str[__pos], __c)) return __pos; return npos; } template<typename _CharT, typename _Traits> constexpr typename basic_string_view<_CharT, _Traits>::size_type basic_string_view<_CharT, _Traits>:: find_last_not_of(const _CharT* __str, size_type __pos, size_type __n) const noexcept { __glibcxx_requires_string_len(__str, __n); size_type __size = this->_M_len; if (__size) { if (--__size > __pos) __size = __pos; do { if (!traits_type::find(__str, __n, this->_M_str[__size])) return __size; } while (__size--); } return npos; } template<typename _CharT, typename _Traits> constexpr typename basic_string_view<_CharT, _Traits>::size_type basic_string_view<_CharT, _Traits>:: find_last_not_of(_CharT __c, size_type __pos) const noexcept { size_type __size = this->_M_len; if (__size) { if (--__size > __pos) __size = __pos; do { if (!traits_type::eq(this->_M_str[__size], __c)) return __size; } while (__size--); } return npos; } _GLIBCXX_END_NAMESPACE_VERSION } // namespace std #endif // __cplusplus <= 201402L #endif // _GLIBCXX_STRING_VIEW_TCC SIMPAN PERUBAHAN