| // Components for manipulating sequences of characters -*- C++ -*- |
| |
| // Copyright (C) 1997-2021 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 bits/basic_string.tcc |
| * This is an internal header file, included by other library headers. |
| * Do not attempt to use it directly. @headername{string} |
| */ |
| |
| // |
| // ISO C++ 14882: 21 Strings library |
| // |
| |
| // Written by Jason Merrill based upon the specification by Takanori Adachi |
| // in ANSI X3J16/94-0013R2. Rewritten by Nathan Myers to ISO-14882. |
| // Non-reference-counted implementation written by Paolo Carlini and |
| // updated by Jonathan Wakely for ISO-14882-2011. |
| |
| #ifndef _BASIC_STRING_TCC |
| #define _BASIC_STRING_TCC 1 |
| |
| #pragma GCC system_header |
| |
| #include <bits/cxxabi_forced.h> |
| |
| namespace std _GLIBCXX_VISIBILITY(default) |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| #if _GLIBCXX_USE_CXX11_ABI |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| const typename basic_string<_CharT, _Traits, _Alloc>::size_type |
| basic_string<_CharT, _Traits, _Alloc>::npos; |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| void |
| basic_string<_CharT, _Traits, _Alloc>:: |
| swap(basic_string& __s) _GLIBCXX_NOEXCEPT |
| { |
| if (this == std::__addressof(__s)) |
| return; |
| |
| _Alloc_traits::_S_on_swap(_M_get_allocator(), __s._M_get_allocator()); |
| |
| if (_M_is_local()) |
| if (__s._M_is_local()) |
| { |
| if (length() && __s.length()) |
| { |
| _CharT __tmp_data[_S_local_capacity + 1]; |
| traits_type::copy(__tmp_data, __s._M_local_buf, |
| _S_local_capacity + 1); |
| traits_type::copy(__s._M_local_buf, _M_local_buf, |
| _S_local_capacity + 1); |
| traits_type::copy(_M_local_buf, __tmp_data, |
| _S_local_capacity + 1); |
| } |
| else if (__s.length()) |
| { |
| traits_type::copy(_M_local_buf, __s._M_local_buf, |
| _S_local_capacity + 1); |
| _M_length(__s.length()); |
| __s._M_set_length(0); |
| return; |
| } |
| else if (length()) |
| { |
| traits_type::copy(__s._M_local_buf, _M_local_buf, |
| _S_local_capacity + 1); |
| __s._M_length(length()); |
| _M_set_length(0); |
| return; |
| } |
| } |
| else |
| { |
| const size_type __tmp_capacity = __s._M_allocated_capacity; |
| traits_type::copy(__s._M_local_buf, _M_local_buf, |
| _S_local_capacity + 1); |
| _M_data(__s._M_data()); |
| __s._M_data(__s._M_local_buf); |
| _M_capacity(__tmp_capacity); |
| } |
| else |
| { |
| const size_type __tmp_capacity = _M_allocated_capacity; |
| if (__s._M_is_local()) |
| { |
| traits_type::copy(_M_local_buf, __s._M_local_buf, |
| _S_local_capacity + 1); |
| __s._M_data(_M_data()); |
| _M_data(_M_local_buf); |
| } |
| else |
| { |
| pointer __tmp_ptr = _M_data(); |
| _M_data(__s._M_data()); |
| __s._M_data(__tmp_ptr); |
| _M_capacity(__s._M_allocated_capacity); |
| } |
| __s._M_capacity(__tmp_capacity); |
| } |
| |
| const size_type __tmp_length = length(); |
| _M_length(__s.length()); |
| __s._M_length(__tmp_length); |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| typename basic_string<_CharT, _Traits, _Alloc>::pointer |
| basic_string<_CharT, _Traits, _Alloc>:: |
| _M_create(size_type& __capacity, size_type __old_capacity) |
| { |
| // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| // 83. String::npos vs. string::max_size() |
| if (__capacity > max_size()) |
| std::__throw_length_error(__N("basic_string::_M_create")); |
| |
| // The below implements an exponential growth policy, necessary to |
| // meet amortized linear time requirements of the library: see |
| // http://gcc.gnu.org/ml/libstdc++/2001-07/msg00085.html. |
| if (__capacity > __old_capacity && __capacity < 2 * __old_capacity) |
| { |
| __capacity = 2 * __old_capacity; |
| // Never allocate a string bigger than max_size. |
| if (__capacity > max_size()) |
| __capacity = max_size(); |
| } |
| |
| // NB: Need an array of char_type[__capacity], plus a terminating |
| // null char_type() element. |
| return _Alloc_traits::allocate(_M_get_allocator(), __capacity + 1); |
| } |
| |
| // NB: This is the special case for Input Iterators, used in |
| // istreambuf_iterators, etc. |
| // Input Iterators have a cost structure very different from |
| // pointers, calling for a different coding style. |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| template<typename _InIterator> |
| void |
| basic_string<_CharT, _Traits, _Alloc>:: |
| _M_construct(_InIterator __beg, _InIterator __end, |
| std::input_iterator_tag) |
| { |
| size_type __len = 0; |
| size_type __capacity = size_type(_S_local_capacity); |
| |
| while (__beg != __end && __len < __capacity) |
| { |
| _M_data()[__len++] = *__beg; |
| ++__beg; |
| } |
| |
| __try |
| { |
| while (__beg != __end) |
| { |
| if (__len == __capacity) |
| { |
| // Allocate more space. |
| __capacity = __len + 1; |
| pointer __another = _M_create(__capacity, __len); |
| this->_S_copy(__another, _M_data(), __len); |
| _M_dispose(); |
| _M_data(__another); |
| _M_capacity(__capacity); |
| } |
| _M_data()[__len++] = *__beg; |
| ++__beg; |
| } |
| } |
| __catch(...) |
| { |
| _M_dispose(); |
| __throw_exception_again; |
| } |
| |
| _M_set_length(__len); |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| template<typename _InIterator> |
| void |
| basic_string<_CharT, _Traits, _Alloc>:: |
| _M_construct(_InIterator __beg, _InIterator __end, |
| std::forward_iterator_tag) |
| { |
| // NB: Not required, but considered best practice. |
| if (__gnu_cxx::__is_null_pointer(__beg) && __beg != __end) |
| std::__throw_logic_error(__N("basic_string::" |
| "_M_construct null not valid")); |
| |
| size_type __dnew = static_cast<size_type>(std::distance(__beg, __end)); |
| |
| if (__dnew > size_type(_S_local_capacity)) |
| { |
| _M_data(_M_create(__dnew, size_type(0))); |
| _M_capacity(__dnew); |
| } |
| |
| // Check for out_of_range and length_error exceptions. |
| __try |
| { this->_S_copy_chars(_M_data(), __beg, __end); } |
| __catch(...) |
| { |
| _M_dispose(); |
| __throw_exception_again; |
| } |
| |
| _M_set_length(__dnew); |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| void |
| basic_string<_CharT, _Traits, _Alloc>:: |
| _M_construct(size_type __n, _CharT __c) |
| { |
| if (__n > size_type(_S_local_capacity)) |
| { |
| _M_data(_M_create(__n, size_type(0))); |
| _M_capacity(__n); |
| } |
| |
| if (__n) |
| this->_S_assign(_M_data(), __n, __c); |
| |
| _M_set_length(__n); |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| void |
| basic_string<_CharT, _Traits, _Alloc>:: |
| _M_assign(const basic_string& __str) |
| { |
| if (this != std::__addressof(__str)) |
| { |
| const size_type __rsize = __str.length(); |
| const size_type __capacity = capacity(); |
| |
| if (__rsize > __capacity) |
| { |
| size_type __new_capacity = __rsize; |
| pointer __tmp = _M_create(__new_capacity, __capacity); |
| _M_dispose(); |
| _M_data(__tmp); |
| _M_capacity(__new_capacity); |
| } |
| |
| if (__rsize) |
| this->_S_copy(_M_data(), __str._M_data(), __rsize); |
| |
| _M_set_length(__rsize); |
| } |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| void |
| basic_string<_CharT, _Traits, _Alloc>:: |
| reserve(size_type __res) |
| { |
| const size_type __capacity = capacity(); |
| // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| // 2968. Inconsistencies between basic_string reserve and |
| // vector/unordered_map/unordered_set reserve functions |
| // P0966 reserve should not shrink |
| if (__res <= __capacity) |
| return; |
| |
| pointer __tmp = _M_create(__res, __capacity); |
| this->_S_copy(__tmp, _M_data(), length() + 1); |
| _M_dispose(); |
| _M_data(__tmp); |
| _M_capacity(__res); |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| void |
| basic_string<_CharT, _Traits, _Alloc>:: |
| _M_mutate(size_type __pos, size_type __len1, const _CharT* __s, |
| size_type __len2) |
| { |
| const size_type __how_much = length() - __pos - __len1; |
| |
| size_type __new_capacity = length() + __len2 - __len1; |
| pointer __r = _M_create(__new_capacity, capacity()); |
| |
| if (__pos) |
| this->_S_copy(__r, _M_data(), __pos); |
| if (__s && __len2) |
| this->_S_copy(__r + __pos, __s, __len2); |
| if (__how_much) |
| this->_S_copy(__r + __pos + __len2, |
| _M_data() + __pos + __len1, __how_much); |
| |
| _M_dispose(); |
| _M_data(__r); |
| _M_capacity(__new_capacity); |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| void |
| basic_string<_CharT, _Traits, _Alloc>:: |
| _M_erase(size_type __pos, size_type __n) |
| { |
| const size_type __how_much = length() - __pos - __n; |
| |
| if (__how_much && __n) |
| this->_S_move(_M_data() + __pos, _M_data() + __pos + __n, __how_much); |
| |
| _M_set_length(length() - __n); |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| void |
| basic_string<_CharT, _Traits, _Alloc>:: |
| reserve() |
| { |
| if (_M_is_local()) |
| return; |
| |
| const size_type __length = length(); |
| const size_type __capacity = _M_allocated_capacity; |
| |
| if (__length <= size_type(_S_local_capacity)) |
| { |
| this->_S_copy(_M_local_data(), _M_data(), __length + 1); |
| _M_destroy(__capacity); |
| _M_data(_M_local_data()); |
| } |
| #if __cpp_exceptions |
| else if (__length < __capacity) |
| try |
| { |
| pointer __tmp |
| = _Alloc_traits::allocate(_M_get_allocator(), __length + 1); |
| this->_S_copy(__tmp, _M_data(), __length + 1); |
| _M_dispose(); |
| _M_data(__tmp); |
| _M_capacity(__length); |
| } |
| catch (const __cxxabiv1::__forced_unwind&) |
| { throw; } |
| catch (...) |
| { /* swallow the exception */ } |
| #endif |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| void |
| basic_string<_CharT, _Traits, _Alloc>:: |
| resize(size_type __n, _CharT __c) |
| { |
| const size_type __size = this->size(); |
| if (__size < __n) |
| this->append(__n - __size, __c); |
| else if (__n < __size) |
| this->_M_set_length(__n); |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| basic_string<_CharT, _Traits, _Alloc>& |
| basic_string<_CharT, _Traits, _Alloc>:: |
| _M_append(const _CharT* __s, size_type __n) |
| { |
| const size_type __len = __n + this->size(); |
| |
| if (__len <= this->capacity()) |
| { |
| if (__n) |
| this->_S_copy(this->_M_data() + this->size(), __s, __n); |
| } |
| else |
| this->_M_mutate(this->size(), size_type(0), __s, __n); |
| |
| this->_M_set_length(__len); |
| return *this; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| template<typename _InputIterator> |
| basic_string<_CharT, _Traits, _Alloc>& |
| basic_string<_CharT, _Traits, _Alloc>:: |
| _M_replace_dispatch(const_iterator __i1, const_iterator __i2, |
| _InputIterator __k1, _InputIterator __k2, |
| std::__false_type) |
| { |
| // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| // 2788. unintentionally require a default constructible allocator |
| const basic_string __s(__k1, __k2, this->get_allocator()); |
| const size_type __n1 = __i2 - __i1; |
| return _M_replace(__i1 - begin(), __n1, __s._M_data(), |
| __s.size()); |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| basic_string<_CharT, _Traits, _Alloc>& |
| basic_string<_CharT, _Traits, _Alloc>:: |
| _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2, |
| _CharT __c) |
| { |
| _M_check_length(__n1, __n2, "basic_string::_M_replace_aux"); |
| |
| const size_type __old_size = this->size(); |
| const size_type __new_size = __old_size + __n2 - __n1; |
| |
| if (__new_size <= this->capacity()) |
| { |
| pointer __p = this->_M_data() + __pos1; |
| |
| const size_type __how_much = __old_size - __pos1 - __n1; |
| if (__how_much && __n1 != __n2) |
| this->_S_move(__p + __n2, __p + __n1, __how_much); |
| } |
| else |
| this->_M_mutate(__pos1, __n1, 0, __n2); |
| |
| if (__n2) |
| this->_S_assign(this->_M_data() + __pos1, __n2, __c); |
| |
| this->_M_set_length(__new_size); |
| return *this; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| basic_string<_CharT, _Traits, _Alloc>& |
| basic_string<_CharT, _Traits, _Alloc>:: |
| _M_replace(size_type __pos, size_type __len1, const _CharT* __s, |
| const size_type __len2) |
| { |
| _M_check_length(__len1, __len2, "basic_string::_M_replace"); |
| |
| const size_type __old_size = this->size(); |
| const size_type __new_size = __old_size + __len2 - __len1; |
| |
| if (__new_size <= this->capacity()) |
| { |
| pointer __p = this->_M_data() + __pos; |
| |
| const size_type __how_much = __old_size - __pos - __len1; |
| if (_M_disjunct(__s)) |
| { |
| if (__how_much && __len1 != __len2) |
| this->_S_move(__p + __len2, __p + __len1, __how_much); |
| if (__len2) |
| this->_S_copy(__p, __s, __len2); |
| } |
| else |
| { |
| // Work in-place. |
| if (__len2 && __len2 <= __len1) |
| this->_S_move(__p, __s, __len2); |
| if (__how_much && __len1 != __len2) |
| this->_S_move(__p + __len2, __p + __len1, __how_much); |
| if (__len2 > __len1) |
| { |
| if (__s + __len2 <= __p + __len1) |
| this->_S_move(__p, __s, __len2); |
| else if (__s >= __p + __len1) |
| { |
| // Hint to middle end that __p and __s overlap |
| // (PR 98465). |
| const size_type __poff = (__s - __p) + (__len2 - __len1); |
| this->_S_copy(__p, __p + __poff, __len2); |
| } |
| else |
| { |
| const size_type __nleft = (__p + __len1) - __s; |
| this->_S_move(__p, __s, __nleft); |
| this->_S_copy(__p + __nleft, __p + __len2, |
| __len2 - __nleft); |
| } |
| } |
| } |
| } |
| else |
| this->_M_mutate(__pos, __len1, __s, __len2); |
| |
| this->_M_set_length(__new_size); |
| return *this; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| typename basic_string<_CharT, _Traits, _Alloc>::size_type |
| basic_string<_CharT, _Traits, _Alloc>:: |
| copy(_CharT* __s, size_type __n, size_type __pos) const |
| { |
| _M_check(__pos, "basic_string::copy"); |
| __n = _M_limit(__pos, __n); |
| __glibcxx_requires_string_len(__s, __n); |
| if (__n) |
| _S_copy(__s, _M_data() + __pos, __n); |
| // 21.3.5.7 par 3: do not append null. (good.) |
| return __n; |
| } |
| |
| #if __cplusplus > 202002L |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| template<typename _Operation> |
| constexpr void |
| basic_string<_CharT, _Traits, _Alloc>:: |
| resize_and_overwrite(size_type __n, _Operation __op) |
| { |
| const size_type __capacity = capacity(); |
| _CharT* __p; |
| if (__n > __capacity) |
| { |
| __p = _M_create(__n, __capacity); |
| this->_S_copy(__p, _M_data(), length()); // exclude trailing null |
| _M_dispose(); |
| _M_data(__p); |
| _M_capacity(__n); |
| } |
| else |
| __p = _M_data(); |
| struct _Terminator { |
| ~_Terminator() { _M_this->_M_set_length(_M_r); } |
| basic_string* _M_this; |
| size_type _M_r; |
| }; |
| _Terminator __term{this}; |
| const size_type __n2 [[maybe_unused]] = __n; |
| __term._M_r = std::move(__op)(__p, __n); |
| _GLIBCXX_DEBUG_ASSERT(__term._M_r >= 0 && __term._M_r <= __n2); |
| } |
| #endif // C++23 |
| |
| #endif // _GLIBCXX_USE_CXX11_ABI |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| basic_string<_CharT, _Traits, _Alloc> |
| operator+(const _CharT* __lhs, |
| const basic_string<_CharT, _Traits, _Alloc>& __rhs) |
| { |
| __glibcxx_requires_string(__lhs); |
| typedef basic_string<_CharT, _Traits, _Alloc> __string_type; |
| typedef typename __string_type::size_type __size_type; |
| typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template |
| rebind<_CharT>::other _Char_alloc_type; |
| typedef __gnu_cxx::__alloc_traits<_Char_alloc_type> _Alloc_traits; |
| const __size_type __len = _Traits::length(__lhs); |
| __string_type __str(_Alloc_traits::_S_select_on_copy( |
| __rhs.get_allocator())); |
| __str.reserve(__len + __rhs.size()); |
| __str.append(__lhs, __len); |
| __str.append(__rhs); |
| return __str; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| basic_string<_CharT, _Traits, _Alloc> |
| operator+(_CharT __lhs, const basic_string<_CharT, _Traits, _Alloc>& __rhs) |
| { |
| typedef basic_string<_CharT, _Traits, _Alloc> __string_type; |
| typedef typename __string_type::size_type __size_type; |
| typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template |
| rebind<_CharT>::other _Char_alloc_type; |
| typedef __gnu_cxx::__alloc_traits<_Char_alloc_type> _Alloc_traits; |
| __string_type __str(_Alloc_traits::_S_select_on_copy( |
| __rhs.get_allocator())); |
| const __size_type __len = __rhs.size(); |
| __str.reserve(__len + 1); |
| __str.append(__size_type(1), __lhs); |
| __str.append(__rhs); |
| return __str; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| typename basic_string<_CharT, _Traits, _Alloc>::size_type |
| basic_string<_CharT, _Traits, _Alloc>:: |
| find(const _CharT* __s, size_type __pos, size_type __n) const |
| _GLIBCXX_NOEXCEPT |
| { |
| __glibcxx_requires_string_len(__s, __n); |
| const size_type __size = this->size(); |
| |
| if (__n == 0) |
| return __pos <= __size ? __pos : npos; |
| if (__pos >= __size) |
| return npos; |
| |
| const _CharT __elem0 = __s[0]; |
| const _CharT* const __data = data(); |
| const _CharT* __first = __data + __pos; |
| const _CharT* const __last = __data + __size; |
| size_type __len = __size - __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, __s, __n) == 0) |
| return __first - __data; |
| __len = __last - ++__first; |
| } |
| return npos; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| typename basic_string<_CharT, _Traits, _Alloc>::size_type |
| basic_string<_CharT, _Traits, _Alloc>:: |
| find(_CharT __c, size_type __pos) const _GLIBCXX_NOEXCEPT |
| { |
| size_type __ret = npos; |
| const size_type __size = this->size(); |
| if (__pos < __size) |
| { |
| const _CharT* __data = _M_data(); |
| const size_type __n = __size - __pos; |
| const _CharT* __p = traits_type::find(__data + __pos, __n, __c); |
| if (__p) |
| __ret = __p - __data; |
| } |
| return __ret; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| typename basic_string<_CharT, _Traits, _Alloc>::size_type |
| basic_string<_CharT, _Traits, _Alloc>:: |
| rfind(const _CharT* __s, size_type __pos, size_type __n) const |
| _GLIBCXX_NOEXCEPT |
| { |
| __glibcxx_requires_string_len(__s, __n); |
| const size_type __size = this->size(); |
| if (__n <= __size) |
| { |
| __pos = std::min(size_type(__size - __n), __pos); |
| const _CharT* __data = _M_data(); |
| do |
| { |
| if (traits_type::compare(__data + __pos, __s, __n) == 0) |
| return __pos; |
| } |
| while (__pos-- > 0); |
| } |
| return npos; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| typename basic_string<_CharT, _Traits, _Alloc>::size_type |
| basic_string<_CharT, _Traits, _Alloc>:: |
| rfind(_CharT __c, size_type __pos) const _GLIBCXX_NOEXCEPT |
| { |
| size_type __size = this->size(); |
| if (__size) |
| { |
| if (--__size > __pos) |
| __size = __pos; |
| for (++__size; __size-- > 0; ) |
| if (traits_type::eq(_M_data()[__size], __c)) |
| return __size; |
| } |
| return npos; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| typename basic_string<_CharT, _Traits, _Alloc>::size_type |
| basic_string<_CharT, _Traits, _Alloc>:: |
| find_first_of(const _CharT* __s, size_type __pos, size_type __n) const |
| _GLIBCXX_NOEXCEPT |
| { |
| __glibcxx_requires_string_len(__s, __n); |
| for (; __n && __pos < this->size(); ++__pos) |
| { |
| const _CharT* __p = traits_type::find(__s, __n, _M_data()[__pos]); |
| if (__p) |
| return __pos; |
| } |
| return npos; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| typename basic_string<_CharT, _Traits, _Alloc>::size_type |
| basic_string<_CharT, _Traits, _Alloc>:: |
| find_last_of(const _CharT* __s, size_type __pos, size_type __n) const |
| _GLIBCXX_NOEXCEPT |
| { |
| __glibcxx_requires_string_len(__s, __n); |
| size_type __size = this->size(); |
| if (__size && __n) |
| { |
| if (--__size > __pos) |
| __size = __pos; |
| do |
| { |
| if (traits_type::find(__s, __n, _M_data()[__size])) |
| return __size; |
| } |
| while (__size-- != 0); |
| } |
| return npos; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| typename basic_string<_CharT, _Traits, _Alloc>::size_type |
| basic_string<_CharT, _Traits, _Alloc>:: |
| find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const |
| _GLIBCXX_NOEXCEPT |
| { |
| __glibcxx_requires_string_len(__s, __n); |
| for (; __pos < this->size(); ++__pos) |
| if (!traits_type::find(__s, __n, _M_data()[__pos])) |
| return __pos; |
| return npos; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| typename basic_string<_CharT, _Traits, _Alloc>::size_type |
| basic_string<_CharT, _Traits, _Alloc>:: |
| find_first_not_of(_CharT __c, size_type __pos) const _GLIBCXX_NOEXCEPT |
| { |
| for (; __pos < this->size(); ++__pos) |
| if (!traits_type::eq(_M_data()[__pos], __c)) |
| return __pos; |
| return npos; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| typename basic_string<_CharT, _Traits, _Alloc>::size_type |
| basic_string<_CharT, _Traits, _Alloc>:: |
| find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const |
| _GLIBCXX_NOEXCEPT |
| { |
| __glibcxx_requires_string_len(__s, __n); |
| size_type __size = this->size(); |
| if (__size) |
| { |
| if (--__size > __pos) |
| __size = __pos; |
| do |
| { |
| if (!traits_type::find(__s, __n, _M_data()[__size])) |
| return __size; |
| } |
| while (__size--); |
| } |
| return npos; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| typename basic_string<_CharT, _Traits, _Alloc>::size_type |
| basic_string<_CharT, _Traits, _Alloc>:: |
| find_last_not_of(_CharT __c, size_type __pos) const _GLIBCXX_NOEXCEPT |
| { |
| size_type __size = this->size(); |
| if (__size) |
| { |
| if (--__size > __pos) |
| __size = __pos; |
| do |
| { |
| if (!traits_type::eq(_M_data()[__size], __c)) |
| return __size; |
| } |
| while (__size--); |
| } |
| return npos; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| int |
| basic_string<_CharT, _Traits, _Alloc>:: |
| compare(size_type __pos, size_type __n, const basic_string& __str) const |
| { |
| _M_check(__pos, "basic_string::compare"); |
| __n = _M_limit(__pos, __n); |
| const size_type __osize = __str.size(); |
| const size_type __len = std::min(__n, __osize); |
| int __r = traits_type::compare(_M_data() + __pos, __str.data(), __len); |
| if (!__r) |
| __r = _S_compare(__n, __osize); |
| return __r; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| int |
| basic_string<_CharT, _Traits, _Alloc>:: |
| compare(size_type __pos1, size_type __n1, const basic_string& __str, |
| size_type __pos2, size_type __n2) const |
| { |
| _M_check(__pos1, "basic_string::compare"); |
| __str._M_check(__pos2, "basic_string::compare"); |
| __n1 = _M_limit(__pos1, __n1); |
| __n2 = __str._M_limit(__pos2, __n2); |
| const size_type __len = std::min(__n1, __n2); |
| int __r = traits_type::compare(_M_data() + __pos1, |
| __str.data() + __pos2, __len); |
| if (!__r) |
| __r = _S_compare(__n1, __n2); |
| return __r; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| int |
| basic_string<_CharT, _Traits, _Alloc>:: |
| compare(const _CharT* __s) const _GLIBCXX_NOEXCEPT |
| { |
| __glibcxx_requires_string(__s); |
| const size_type __size = this->size(); |
| const size_type __osize = traits_type::length(__s); |
| const size_type __len = std::min(__size, __osize); |
| int __r = traits_type::compare(_M_data(), __s, __len); |
| if (!__r) |
| __r = _S_compare(__size, __osize); |
| return __r; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| int |
| basic_string <_CharT, _Traits, _Alloc>:: |
| compare(size_type __pos, size_type __n1, const _CharT* __s) const |
| { |
| __glibcxx_requires_string(__s); |
| _M_check(__pos, "basic_string::compare"); |
| __n1 = _M_limit(__pos, __n1); |
| const size_type __osize = traits_type::length(__s); |
| const size_type __len = std::min(__n1, __osize); |
| int __r = traits_type::compare(_M_data() + __pos, __s, __len); |
| if (!__r) |
| __r = _S_compare(__n1, __osize); |
| return __r; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| int |
| basic_string <_CharT, _Traits, _Alloc>:: |
| compare(size_type __pos, size_type __n1, const _CharT* __s, |
| size_type __n2) const |
| { |
| __glibcxx_requires_string_len(__s, __n2); |
| _M_check(__pos, "basic_string::compare"); |
| __n1 = _M_limit(__pos, __n1); |
| const size_type __len = std::min(__n1, __n2); |
| int __r = traits_type::compare(_M_data() + __pos, __s, __len); |
| if (!__r) |
| __r = _S_compare(__n1, __n2); |
| return __r; |
| } |
| |
| // 21.3.7.9 basic_string::getline and operators |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| basic_istream<_CharT, _Traits>& |
| operator>>(basic_istream<_CharT, _Traits>& __in, |
| basic_string<_CharT, _Traits, _Alloc>& __str) |
| { |
| typedef basic_istream<_CharT, _Traits> __istream_type; |
| typedef basic_string<_CharT, _Traits, _Alloc> __string_type; |
| typedef typename __istream_type::ios_base __ios_base; |
| typedef typename __istream_type::int_type __int_type; |
| typedef typename __string_type::size_type __size_type; |
| typedef ctype<_CharT> __ctype_type; |
| typedef typename __ctype_type::ctype_base __ctype_base; |
| |
| __size_type __extracted = 0; |
| typename __ios_base::iostate __err = __ios_base::goodbit; |
| typename __istream_type::sentry __cerb(__in, false); |
| if (__cerb) |
| { |
| __try |
| { |
| // Avoid reallocation for common case. |
| __str.erase(); |
| _CharT __buf[128]; |
| __size_type __len = 0; |
| const streamsize __w = __in.width(); |
| const __size_type __n = __w > 0 ? static_cast<__size_type>(__w) |
| : __str.max_size(); |
| const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc()); |
| const __int_type __eof = _Traits::eof(); |
| __int_type __c = __in.rdbuf()->sgetc(); |
| |
| while (__extracted < __n |
| && !_Traits::eq_int_type(__c, __eof) |
| && !__ct.is(__ctype_base::space, |
| _Traits::to_char_type(__c))) |
| { |
| if (__len == sizeof(__buf) / sizeof(_CharT)) |
| { |
| __str.append(__buf, sizeof(__buf) / sizeof(_CharT)); |
| __len = 0; |
| } |
| __buf[__len++] = _Traits::to_char_type(__c); |
| ++__extracted; |
| __c = __in.rdbuf()->snextc(); |
| } |
| __str.append(__buf, __len); |
| |
| if (__extracted < __n && _Traits::eq_int_type(__c, __eof)) |
| __err |= __ios_base::eofbit; |
| __in.width(0); |
| } |
| __catch(__cxxabiv1::__forced_unwind&) |
| { |
| __in._M_setstate(__ios_base::badbit); |
| __throw_exception_again; |
| } |
| __catch(...) |
| { |
| // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| // 91. Description of operator>> and getline() for string<> |
| // might cause endless loop |
| __in._M_setstate(__ios_base::badbit); |
| } |
| } |
| // 211. operator>>(istream&, string&) doesn't set failbit |
| if (!__extracted) |
| __err |= __ios_base::failbit; |
| if (__err) |
| __in.setstate(__err); |
| return __in; |
| } |
| |
| template<typename _CharT, typename _Traits, typename _Alloc> |
| basic_istream<_CharT, _Traits>& |
| getline(basic_istream<_CharT, _Traits>& __in, |
| basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim) |
| { |
| typedef basic_istream<_CharT, _Traits> __istream_type; |
| typedef basic_string<_CharT, _Traits, _Alloc> __string_type; |
| typedef typename __istream_type::ios_base __ios_base; |
| typedef typename __istream_type::int_type __int_type; |
| typedef typename __string_type::size_type __size_type; |
| |
| __size_type __extracted = 0; |
| const __size_type __n = __str.max_size(); |
| typename __ios_base::iostate __err = __ios_base::goodbit; |
| typename __istream_type::sentry __cerb(__in, true); |
| if (__cerb) |
| { |
| __try |
| { |
| __str.erase(); |
| const __int_type __idelim = _Traits::to_int_type(__delim); |
| const __int_type __eof = _Traits::eof(); |
| __int_type __c = __in.rdbuf()->sgetc(); |
| |
| while (__extracted < __n |
| && !_Traits::eq_int_type(__c, __eof) |
| && !_Traits::eq_int_type(__c, __idelim)) |
| { |
| __str += _Traits::to_char_type(__c); |
| ++__extracted; |
| __c = __in.rdbuf()->snextc(); |
| } |
| |
| if (_Traits::eq_int_type(__c, __eof)) |
| __err |= __ios_base::eofbit; |
| else if (_Traits::eq_int_type(__c, __idelim)) |
| { |
| ++__extracted; |
| __in.rdbuf()->sbumpc(); |
| } |
| else |
| __err |= __ios_base::failbit; |
| } |
| __catch(__cxxabiv1::__forced_unwind&) |
| { |
| __in._M_setstate(__ios_base::badbit); |
| __throw_exception_again; |
| } |
| __catch(...) |
| { |
| // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| // 91. Description of operator>> and getline() for string<> |
| // might cause endless loop |
| __in._M_setstate(__ios_base::badbit); |
| } |
| } |
| if (!__extracted) |
| __err |= __ios_base::failbit; |
| if (__err) |
| __in.setstate(__err); |
| return __in; |
| } |
| |
| // Inhibit implicit instantiations for required instantiations, |
| // which are defined via explicit instantiations elsewhere. |
| #if _GLIBCXX_EXTERN_TEMPLATE |
| // The explicit instantiation definitions in src/c++11/string-inst.cc and |
| // src/c++17/string-inst.cc only instantiate the members required for C++17 |
| // and earlier standards (so not C++20's starts_with and ends_with). |
| // Suppress the explicit instantiation declarations for C++20, so C++20 |
| // code will implicitly instantiate std::string and std::wstring as needed. |
| # if __cplusplus <= 201703L && _GLIBCXX_EXTERN_TEMPLATE > 0 |
| extern template class basic_string<char>; |
| # elif ! _GLIBCXX_USE_CXX11_ABI |
| // Still need to prevent implicit instantiation of the COW empty rep, |
| // to ensure the definition in libstdc++.so is unique (PR 86138). |
| extern template basic_string<char>::size_type |
| basic_string<char>::_Rep::_S_empty_rep_storage[]; |
| # endif |
| |
| extern template |
| basic_istream<char>& |
| operator>>(basic_istream<char>&, string&); |
| extern template |
| basic_ostream<char>& |
| operator<<(basic_ostream<char>&, const string&); |
| extern template |
| basic_istream<char>& |
| getline(basic_istream<char>&, string&, char); |
| extern template |
| basic_istream<char>& |
| getline(basic_istream<char>&, string&); |
| |
| #ifdef _GLIBCXX_USE_WCHAR_T |
| # if __cplusplus <= 201703L && _GLIBCXX_EXTERN_TEMPLATE > 0 |
| extern template class basic_string<wchar_t>; |
| # elif ! _GLIBCXX_USE_CXX11_ABI |
| extern template basic_string<wchar_t>::size_type |
| basic_string<wchar_t>::_Rep::_S_empty_rep_storage[]; |
| # endif |
| |
| extern template |
| basic_istream<wchar_t>& |
| operator>>(basic_istream<wchar_t>&, wstring&); |
| extern template |
| basic_ostream<wchar_t>& |
| operator<<(basic_ostream<wchar_t>&, const wstring&); |
| extern template |
| basic_istream<wchar_t>& |
| getline(basic_istream<wchar_t>&, wstring&, wchar_t); |
| extern template |
| basic_istream<wchar_t>& |
| getline(basic_istream<wchar_t>&, wstring&); |
| #endif // _GLIBCXX_USE_WCHAR_T |
| #endif // _GLIBCXX_EXTERN_TEMPLATE |
| |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } // namespace std |
| |
| #endif |
