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- // Components for manipulating sequences of characters -*- C++ -*-
- // Copyright (C) 1997-2022 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>
- _GLIBCXX20_CONSTEXPR
- 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.length() + 1);
- traits_type::copy(__s._M_local_buf, _M_local_buf,
- length() + 1);
- traits_type::copy(_M_local_buf, __tmp_data,
- __s.length() + 1);
- }
- else if (__s.length())
- {
- traits_type::copy(_M_local_buf, __s._M_local_buf,
- __s.length() + 1);
- _M_length(__s.length());
- __s._M_set_length(0);
- return;
- }
- else if (length())
- {
- traits_type::copy(__s._M_local_buf, _M_local_buf,
- length() + 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,
- length() + 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.length() + 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>
- _GLIBCXX20_CONSTEXPR
- 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>
- _GLIBCXX20_CONSTEXPR
- 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);
- pointer __p = _M_use_local_data();
- while (__beg != __end && __len < __capacity)
- {
- __p[__len++] = *__beg;
- ++__beg;
- }
- struct _Guard
- {
- _GLIBCXX20_CONSTEXPR
- explicit _Guard(basic_string* __s) : _M_guarded(__s) { }
- _GLIBCXX20_CONSTEXPR
- ~_Guard() { if (_M_guarded) _M_guarded->_M_dispose(); }
- basic_string* _M_guarded;
- } __guard(this);
- 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);
- }
- traits_type::assign(_M_data()[__len++], *__beg);
- ++__beg;
- }
- __guard._M_guarded = 0;
- _M_set_length(__len);
- }
- template<typename _CharT, typename _Traits, typename _Alloc>
- template<typename _InIterator>
- _GLIBCXX20_CONSTEXPR
- void
- basic_string<_CharT, _Traits, _Alloc>::
- _M_construct(_InIterator __beg, _InIterator __end,
- std::forward_iterator_tag)
- {
- 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);
- }
- else
- _M_use_local_data();
- // Check for out_of_range and length_error exceptions.
- struct _Guard
- {
- _GLIBCXX20_CONSTEXPR
- explicit _Guard(basic_string* __s) : _M_guarded(__s) { }
- _GLIBCXX20_CONSTEXPR
- ~_Guard() { if (_M_guarded) _M_guarded->_M_dispose(); }
- basic_string* _M_guarded;
- } __guard(this);
- this->_S_copy_chars(_M_data(), __beg, __end);
- __guard._M_guarded = 0;
- _M_set_length(__dnew);
- }
- template<typename _CharT, typename _Traits, typename _Alloc>
- _GLIBCXX20_CONSTEXPR
- 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);
- }
- else
- _M_use_local_data();
- if (__n)
- this->_S_assign(_M_data(), __n, __c);
- _M_set_length(__n);
- }
- template<typename _CharT, typename _Traits, typename _Alloc>
- _GLIBCXX20_CONSTEXPR
- 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>
- _GLIBCXX20_CONSTEXPR
- 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>
- _GLIBCXX20_CONSTEXPR
- 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>
- _GLIBCXX20_CONSTEXPR
- 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>
- _GLIBCXX20_CONSTEXPR
- 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_use_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>
- _GLIBCXX20_CONSTEXPR
- 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>
- _GLIBCXX20_CONSTEXPR
- 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>
- _GLIBCXX20_CONSTEXPR
- 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>
- _GLIBCXX20_CONSTEXPR
- 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>
- _GLIBCXX20_CONSTEXPR
- 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 __cpp_lib_is_constant_evaluated
- if (std::is_constant_evaluated())
- {
- auto __newp = _Alloc_traits::allocate(_M_get_allocator(),
- __new_size);
- _S_copy(__newp, this->_M_data(), __pos);
- _S_copy(__newp + __pos, __s, __len2);
- _S_copy(__newp + __pos + __len2, __p + __len1, __how_much);
- _S_copy(this->_M_data(), __newp, __new_size);
- this->_M_get_allocator().deallocate(__newp, __new_size);
- }
- else
- #endif
- 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>
- _GLIBCXX20_CONSTEXPR
- 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
- #if __cpp_lib_is_constant_evaluated
- if (std::is_constant_evaluated())
- traits_type::assign(__p + length(), __n - length(), _CharT());
- #endif
- _M_dispose();
- _M_data(__p);
- _M_capacity(__n);
- }
- else
- __p = _M_data();
- struct _Terminator {
- constexpr ~_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
-
- #if __cpp_lib_constexpr_string >= 201907L
- # define _GLIBCXX_STRING_CONSTEXPR constexpr
- #else
- # define _GLIBCXX_STRING_CONSTEXPR
- #endif
- template<typename _CharT, typename _Traits, typename _Alloc>
- _GLIBCXX20_CONSTEXPR
- 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>
- _GLIBCXX20_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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>
- _GLIBCXX_STRING_CONSTEXPR
- 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;
- }
- #undef _GLIBCXX_STRING_CONSTEXPR
- // 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
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