1167 lines
38 KiB
C++
1167 lines
38 KiB
C++
// Components for manipulating sequences of characters -*- C++ -*-
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// Copyright (C) 1997-2013 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file bits/basic_string.tcc
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{string}
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*/
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//
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// ISO C++ 14882: 21 Strings library
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//
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// Written by Jason Merrill based upon the specification by Takanori Adachi
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// in ANSI X3J16/94-0013R2. Rewritten by Nathan Myers to ISO-14882.
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#ifndef _BASIC_STRING_TCC
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#define _BASIC_STRING_TCC 1
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#pragma GCC system_header
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#include <bits/cxxabi_forced.h>
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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template<typename _CharT, typename _Traits, typename _Alloc>
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const typename basic_string<_CharT, _Traits, _Alloc>::size_type
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basic_string<_CharT, _Traits, _Alloc>::
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_Rep::_S_max_size = (((npos - sizeof(_Rep_base))/sizeof(_CharT)) - 1) / 4;
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template<typename _CharT, typename _Traits, typename _Alloc>
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const _CharT
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basic_string<_CharT, _Traits, _Alloc>::
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_Rep::_S_terminal = _CharT();
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template<typename _CharT, typename _Traits, typename _Alloc>
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const typename basic_string<_CharT, _Traits, _Alloc>::size_type
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basic_string<_CharT, _Traits, _Alloc>::npos;
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// Linker sets _S_empty_rep_storage to all 0s (one reference, empty string)
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// at static init time (before static ctors are run).
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template<typename _CharT, typename _Traits, typename _Alloc>
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typename basic_string<_CharT, _Traits, _Alloc>::size_type
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basic_string<_CharT, _Traits, _Alloc>::_Rep::_S_empty_rep_storage[
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(sizeof(_Rep_base) + sizeof(_CharT) + sizeof(size_type) - 1) /
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sizeof(size_type)];
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// NB: This is the special case for Input Iterators, used in
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// istreambuf_iterators, etc.
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// Input Iterators have a cost structure very different from
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// pointers, calling for a different coding style.
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template<typename _CharT, typename _Traits, typename _Alloc>
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template<typename _InIterator>
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_CharT*
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basic_string<_CharT, _Traits, _Alloc>::
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_S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a,
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input_iterator_tag)
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{
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#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
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if (__beg == __end && __a == _Alloc())
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return _S_empty_rep()._M_refdata();
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#endif
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// Avoid reallocation for common case.
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_CharT __buf[128];
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size_type __len = 0;
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while (__beg != __end && __len < sizeof(__buf) / sizeof(_CharT))
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{
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__buf[__len++] = *__beg;
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++__beg;
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}
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_Rep* __r = _Rep::_S_create(__len, size_type(0), __a);
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_M_copy(__r->_M_refdata(), __buf, __len);
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__try
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{
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while (__beg != __end)
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{
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if (__len == __r->_M_capacity)
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{
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// Allocate more space.
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_Rep* __another = _Rep::_S_create(__len + 1, __len, __a);
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_M_copy(__another->_M_refdata(), __r->_M_refdata(), __len);
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__r->_M_destroy(__a);
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__r = __another;
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}
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__r->_M_refdata()[__len++] = *__beg;
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++__beg;
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}
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}
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__catch(...)
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{
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__r->_M_destroy(__a);
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__throw_exception_again;
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}
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__r->_M_set_length_and_sharable(__len);
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return __r->_M_refdata();
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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template <typename _InIterator>
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_CharT*
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basic_string<_CharT, _Traits, _Alloc>::
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_S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a,
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forward_iterator_tag)
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{
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#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
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if (__beg == __end && __a == _Alloc())
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return _S_empty_rep()._M_refdata();
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#endif
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// NB: Not required, but considered best practice.
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if (__gnu_cxx::__is_null_pointer(__beg) && __beg != __end)
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__throw_logic_error(__N("basic_string::_S_construct null not valid"));
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const size_type __dnew = static_cast<size_type>(std::distance(__beg,
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__end));
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// Check for out_of_range and length_error exceptions.
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_Rep* __r = _Rep::_S_create(__dnew, size_type(0), __a);
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__try
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{ _S_copy_chars(__r->_M_refdata(), __beg, __end); }
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__catch(...)
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{
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__r->_M_destroy(__a);
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__throw_exception_again;
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}
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__r->_M_set_length_and_sharable(__dnew);
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return __r->_M_refdata();
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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_CharT*
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basic_string<_CharT, _Traits, _Alloc>::
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_S_construct(size_type __n, _CharT __c, const _Alloc& __a)
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{
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#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
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if (__n == 0 && __a == _Alloc())
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return _S_empty_rep()._M_refdata();
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#endif
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// Check for out_of_range and length_error exceptions.
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_Rep* __r = _Rep::_S_create(__n, size_type(0), __a);
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if (__n)
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_M_assign(__r->_M_refdata(), __n, __c);
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__r->_M_set_length_and_sharable(__n);
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return __r->_M_refdata();
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>::
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basic_string(const basic_string& __str)
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: _M_dataplus(__str._M_rep()->_M_grab(_Alloc(__str.get_allocator()),
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__str.get_allocator()),
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__str.get_allocator())
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{ }
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>::
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basic_string(const _Alloc& __a)
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: _M_dataplus(_S_construct(size_type(), _CharT(), __a), __a)
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{ }
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>::
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basic_string(const basic_string& __str, size_type __pos, size_type __n)
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: _M_dataplus(_S_construct(__str._M_data()
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+ __str._M_check(__pos,
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"basic_string::basic_string"),
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__str._M_data() + __str._M_limit(__pos, __n)
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+ __pos, _Alloc()), _Alloc())
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{ }
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>::
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basic_string(const basic_string& __str, size_type __pos,
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size_type __n, const _Alloc& __a)
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: _M_dataplus(_S_construct(__str._M_data()
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+ __str._M_check(__pos,
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"basic_string::basic_string"),
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__str._M_data() + __str._M_limit(__pos, __n)
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+ __pos, __a), __a)
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{ }
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// TBD: DPG annotate
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>::
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basic_string(const _CharT* __s, size_type __n, const _Alloc& __a)
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: _M_dataplus(_S_construct(__s, __s + __n, __a), __a)
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{ }
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// TBD: DPG annotate
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>::
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basic_string(const _CharT* __s, const _Alloc& __a)
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: _M_dataplus(_S_construct(__s, __s ? __s + traits_type::length(__s) :
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__s + npos, __a), __a)
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{ }
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>::
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basic_string(size_type __n, _CharT __c, const _Alloc& __a)
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: _M_dataplus(_S_construct(__n, __c, __a), __a)
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{ }
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// TBD: DPG annotate
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template<typename _CharT, typename _Traits, typename _Alloc>
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template<typename _InputIterator>
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basic_string<_CharT, _Traits, _Alloc>::
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basic_string(_InputIterator __beg, _InputIterator __end, const _Alloc& __a)
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: _M_dataplus(_S_construct(__beg, __end, __a), __a)
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{ }
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#if __cplusplus >= 201103L
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>::
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basic_string(initializer_list<_CharT> __l, const _Alloc& __a)
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: _M_dataplus(_S_construct(__l.begin(), __l.end(), __a), __a)
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{ }
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#endif
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>&
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basic_string<_CharT, _Traits, _Alloc>::
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assign(const basic_string& __str)
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{
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if (_M_rep() != __str._M_rep())
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{
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// XXX MT
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const allocator_type __a = this->get_allocator();
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_CharT* __tmp = __str._M_rep()->_M_grab(__a, __str.get_allocator());
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_M_rep()->_M_dispose(__a);
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_M_data(__tmp);
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}
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return *this;
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>&
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basic_string<_CharT, _Traits, _Alloc>::
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assign(const _CharT* __s, size_type __n)
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{
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__glibcxx_requires_string_len(__s, __n);
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_M_check_length(this->size(), __n, "basic_string::assign");
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if (_M_disjunct(__s) || _M_rep()->_M_is_shared())
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return _M_replace_safe(size_type(0), this->size(), __s, __n);
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else
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{
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// Work in-place.
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const size_type __pos = __s - _M_data();
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if (__pos >= __n)
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_M_copy(_M_data(), __s, __n);
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else if (__pos)
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_M_move(_M_data(), __s, __n);
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_M_rep()->_M_set_length_and_sharable(__n);
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return *this;
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}
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>&
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basic_string<_CharT, _Traits, _Alloc>::
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append(size_type __n, _CharT __c)
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{
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if (__n)
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{
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_M_check_length(size_type(0), __n, "basic_string::append");
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const size_type __len = __n + this->size();
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if (__len > this->capacity() || _M_rep()->_M_is_shared())
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this->reserve(__len);
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_M_assign(_M_data() + this->size(), __n, __c);
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_M_rep()->_M_set_length_and_sharable(__len);
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}
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return *this;
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>&
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basic_string<_CharT, _Traits, _Alloc>::
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append(const _CharT* __s, size_type __n)
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{
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__glibcxx_requires_string_len(__s, __n);
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if (__n)
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{
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_M_check_length(size_type(0), __n, "basic_string::append");
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const size_type __len = __n + this->size();
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if (__len > this->capacity() || _M_rep()->_M_is_shared())
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{
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if (_M_disjunct(__s))
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this->reserve(__len);
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else
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{
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const size_type __off = __s - _M_data();
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this->reserve(__len);
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__s = _M_data() + __off;
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}
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}
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_M_copy(_M_data() + this->size(), __s, __n);
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_M_rep()->_M_set_length_and_sharable(__len);
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}
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return *this;
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>&
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basic_string<_CharT, _Traits, _Alloc>::
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append(const basic_string& __str)
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{
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const size_type __size = __str.size();
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if (__size)
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{
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const size_type __len = __size + this->size();
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if (__len > this->capacity() || _M_rep()->_M_is_shared())
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this->reserve(__len);
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_M_copy(_M_data() + this->size(), __str._M_data(), __size);
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_M_rep()->_M_set_length_and_sharable(__len);
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}
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return *this;
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>&
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basic_string<_CharT, _Traits, _Alloc>::
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append(const basic_string& __str, size_type __pos, size_type __n)
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{
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__str._M_check(__pos, "basic_string::append");
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__n = __str._M_limit(__pos, __n);
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if (__n)
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{
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const size_type __len = __n + this->size();
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if (__len > this->capacity() || _M_rep()->_M_is_shared())
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this->reserve(__len);
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_M_copy(_M_data() + this->size(), __str._M_data() + __pos, __n);
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_M_rep()->_M_set_length_and_sharable(__len);
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}
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return *this;
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>&
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basic_string<_CharT, _Traits, _Alloc>::
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insert(size_type __pos, const _CharT* __s, size_type __n)
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{
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__glibcxx_requires_string_len(__s, __n);
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_M_check(__pos, "basic_string::insert");
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_M_check_length(size_type(0), __n, "basic_string::insert");
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if (_M_disjunct(__s) || _M_rep()->_M_is_shared())
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return _M_replace_safe(__pos, size_type(0), __s, __n);
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else
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{
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// Work in-place.
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const size_type __off = __s - _M_data();
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_M_mutate(__pos, 0, __n);
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__s = _M_data() + __off;
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_CharT* __p = _M_data() + __pos;
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if (__s + __n <= __p)
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_M_copy(__p, __s, __n);
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else if (__s >= __p)
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_M_copy(__p, __s + __n, __n);
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else
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{
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const size_type __nleft = __p - __s;
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_M_copy(__p, __s, __nleft);
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_M_copy(__p + __nleft, __p + __n, __n - __nleft);
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}
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return *this;
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}
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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typename basic_string<_CharT, _Traits, _Alloc>::iterator
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basic_string<_CharT, _Traits, _Alloc>::
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erase(iterator __first, iterator __last)
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{
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_GLIBCXX_DEBUG_PEDASSERT(__first >= _M_ibegin() && __first <= __last
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&& __last <= _M_iend());
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// NB: This isn't just an optimization (bail out early when
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// there is nothing to do, really), it's also a correctness
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// issue vs MT, see libstdc++/40518.
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const size_type __size = __last - __first;
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if (__size)
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{
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const size_type __pos = __first - _M_ibegin();
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_M_mutate(__pos, __size, size_type(0));
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_M_rep()->_M_set_leaked();
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return iterator(_M_data() + __pos);
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}
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else
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return __first;
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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basic_string<_CharT, _Traits, _Alloc>&
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basic_string<_CharT, _Traits, _Alloc>::
|
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replace(size_type __pos, size_type __n1, const _CharT* __s,
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size_type __n2)
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{
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__glibcxx_requires_string_len(__s, __n2);
|
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_M_check(__pos, "basic_string::replace");
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__n1 = _M_limit(__pos, __n1);
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_M_check_length(__n1, __n2, "basic_string::replace");
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bool __left;
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if (_M_disjunct(__s) || _M_rep()->_M_is_shared())
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return _M_replace_safe(__pos, __n1, __s, __n2);
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else if ((__left = __s + __n2 <= _M_data() + __pos)
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|| _M_data() + __pos + __n1 <= __s)
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{
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// Work in-place: non-overlapping case.
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size_type __off = __s - _M_data();
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__left ? __off : (__off += __n2 - __n1);
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_M_mutate(__pos, __n1, __n2);
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_M_copy(_M_data() + __pos, _M_data() + __off, __n2);
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return *this;
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}
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else
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{
|
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// Todo: overlapping case.
|
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const basic_string __tmp(__s, __n2);
|
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return _M_replace_safe(__pos, __n1, __tmp._M_data(), __n2);
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}
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
|
|
void
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basic_string<_CharT, _Traits, _Alloc>::_Rep::
|
|
_M_destroy(const _Alloc& __a) throw ()
|
|
{
|
|
const size_type __size = sizeof(_Rep_base) +
|
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(this->_M_capacity + 1) * sizeof(_CharT);
|
|
_Raw_bytes_alloc(__a).deallocate(reinterpret_cast<char*>(this), __size);
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits, typename _Alloc>
|
|
void
|
|
basic_string<_CharT, _Traits, _Alloc>::
|
|
_M_leak_hard()
|
|
{
|
|
#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
|
|
if (_M_rep() == &_S_empty_rep())
|
|
return;
|
|
#endif
|
|
if (_M_rep()->_M_is_shared())
|
|
_M_mutate(0, 0, 0);
|
|
_M_rep()->_M_set_leaked();
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits, typename _Alloc>
|
|
void
|
|
basic_string<_CharT, _Traits, _Alloc>::
|
|
_M_mutate(size_type __pos, size_type __len1, size_type __len2)
|
|
{
|
|
const size_type __old_size = this->size();
|
|
const size_type __new_size = __old_size + __len2 - __len1;
|
|
const size_type __how_much = __old_size - __pos - __len1;
|
|
|
|
if (__new_size > this->capacity() || _M_rep()->_M_is_shared())
|
|
{
|
|
// Must reallocate.
|
|
const allocator_type __a = get_allocator();
|
|
_Rep* __r = _Rep::_S_create(__new_size, this->capacity(), __a);
|
|
|
|
if (__pos)
|
|
_M_copy(__r->_M_refdata(), _M_data(), __pos);
|
|
if (__how_much)
|
|
_M_copy(__r->_M_refdata() + __pos + __len2,
|
|
_M_data() + __pos + __len1, __how_much);
|
|
|
|
_M_rep()->_M_dispose(__a);
|
|
_M_data(__r->_M_refdata());
|
|
}
|
|
else if (__how_much && __len1 != __len2)
|
|
{
|
|
// Work in-place.
|
|
_M_move(_M_data() + __pos + __len2,
|
|
_M_data() + __pos + __len1, __how_much);
|
|
}
|
|
_M_rep()->_M_set_length_and_sharable(__new_size);
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits, typename _Alloc>
|
|
void
|
|
basic_string<_CharT, _Traits, _Alloc>::
|
|
reserve(size_type __res)
|
|
{
|
|
if (__res != this->capacity() || _M_rep()->_M_is_shared())
|
|
{
|
|
// Make sure we don't shrink below the current size
|
|
if (__res < this->size())
|
|
__res = this->size();
|
|
const allocator_type __a = get_allocator();
|
|
_CharT* __tmp = _M_rep()->_M_clone(__a, __res - this->size());
|
|
_M_rep()->_M_dispose(__a);
|
|
_M_data(__tmp);
|
|
}
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits, typename _Alloc>
|
|
void
|
|
basic_string<_CharT, _Traits, _Alloc>::
|
|
swap(basic_string& __s)
|
|
{
|
|
if (_M_rep()->_M_is_leaked())
|
|
_M_rep()->_M_set_sharable();
|
|
if (__s._M_rep()->_M_is_leaked())
|
|
__s._M_rep()->_M_set_sharable();
|
|
if (this->get_allocator() == __s.get_allocator())
|
|
{
|
|
_CharT* __tmp = _M_data();
|
|
_M_data(__s._M_data());
|
|
__s._M_data(__tmp);
|
|
}
|
|
// The code below can usually be optimized away.
|
|
else
|
|
{
|
|
const basic_string __tmp1(_M_ibegin(), _M_iend(),
|
|
__s.get_allocator());
|
|
const basic_string __tmp2(__s._M_ibegin(), __s._M_iend(),
|
|
this->get_allocator());
|
|
*this = __tmp2;
|
|
__s = __tmp1;
|
|
}
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits, typename _Alloc>
|
|
typename basic_string<_CharT, _Traits, _Alloc>::_Rep*
|
|
basic_string<_CharT, _Traits, _Alloc>::_Rep::
|
|
_S_create(size_type __capacity, size_type __old_capacity,
|
|
const _Alloc& __alloc)
|
|
{
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 83. String::npos vs. string::max_size()
|
|
if (__capacity > _S_max_size)
|
|
__throw_length_error(__N("basic_string::_S_create"));
|
|
|
|
// The standard places no restriction on allocating more memory
|
|
// than is strictly needed within this layer at the moment or as
|
|
// requested by an explicit application call to reserve().
|
|
|
|
// Many malloc implementations perform quite poorly when an
|
|
// application attempts to allocate memory in a stepwise fashion
|
|
// growing each allocation size by only 1 char. Additionally,
|
|
// it makes little sense to allocate less linear memory than the
|
|
// natural blocking size of the malloc implementation.
|
|
// Unfortunately, we would need a somewhat low-level calculation
|
|
// with tuned parameters to get this perfect for any particular
|
|
// malloc implementation. Fortunately, generalizations about
|
|
// common features seen among implementations seems to suffice.
|
|
|
|
// __pagesize need not match the actual VM page size for good
|
|
// results in practice, thus we pick a common value on the low
|
|
// side. __malloc_header_size is an estimate of the amount of
|
|
// overhead per memory allocation (in practice seen N * sizeof
|
|
// (void*) where N is 0, 2 or 4). According to folklore,
|
|
// picking this value on the high side is better than
|
|
// low-balling it (especially when this algorithm is used with
|
|
// malloc implementations that allocate memory blocks rounded up
|
|
// to a size which is a power of 2).
|
|
const size_type __pagesize = 4096;
|
|
const size_type __malloc_header_size = 4 * sizeof(void*);
|
|
|
|
// 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.
|
|
// It's active for allocations requiring an amount of memory above
|
|
// system pagesize. This is consistent with the requirements of the
|
|
// standard: http://gcc.gnu.org/ml/libstdc++/2001-07/msg00130.html
|
|
if (__capacity > __old_capacity && __capacity < 2 * __old_capacity)
|
|
__capacity = 2 * __old_capacity;
|
|
|
|
// NB: Need an array of char_type[__capacity], plus a terminating
|
|
// null char_type() element, plus enough for the _Rep data structure.
|
|
// Whew. Seemingly so needy, yet so elemental.
|
|
size_type __size = (__capacity + 1) * sizeof(_CharT) + sizeof(_Rep);
|
|
|
|
const size_type __adj_size = __size + __malloc_header_size;
|
|
if (__adj_size > __pagesize && __capacity > __old_capacity)
|
|
{
|
|
const size_type __extra = __pagesize - __adj_size % __pagesize;
|
|
__capacity += __extra / sizeof(_CharT);
|
|
// Never allocate a string bigger than _S_max_size.
|
|
if (__capacity > _S_max_size)
|
|
__capacity = _S_max_size;
|
|
__size = (__capacity + 1) * sizeof(_CharT) + sizeof(_Rep);
|
|
}
|
|
|
|
// NB: Might throw, but no worries about a leak, mate: _Rep()
|
|
// does not throw.
|
|
void* __place = _Raw_bytes_alloc(__alloc).allocate(__size);
|
|
_Rep *__p = new (__place) _Rep;
|
|
__p->_M_capacity = __capacity;
|
|
// ABI compatibility - 3.4.x set in _S_create both
|
|
// _M_refcount and _M_length. All callers of _S_create
|
|
// in basic_string.tcc then set just _M_length.
|
|
// In 4.0.x and later both _M_refcount and _M_length
|
|
// are initialized in the callers, unfortunately we can
|
|
// have 3.4.x compiled code with _S_create callers inlined
|
|
// calling 4.0.x+ _S_create.
|
|
__p->_M_set_sharable();
|
|
return __p;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits, typename _Alloc>
|
|
_CharT*
|
|
basic_string<_CharT, _Traits, _Alloc>::_Rep::
|
|
_M_clone(const _Alloc& __alloc, size_type __res)
|
|
{
|
|
// Requested capacity of the clone.
|
|
const size_type __requested_cap = this->_M_length + __res;
|
|
_Rep* __r = _Rep::_S_create(__requested_cap, this->_M_capacity,
|
|
__alloc);
|
|
if (this->_M_length)
|
|
_M_copy(__r->_M_refdata(), _M_refdata(), this->_M_length);
|
|
|
|
__r->_M_set_length_and_sharable(this->_M_length);
|
|
return __r->_M_refdata();
|
|
}
|
|
|
|
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();
|
|
_M_check_length(__size, __n, "basic_string::resize");
|
|
if (__size < __n)
|
|
this->append(__n - __size, __c);
|
|
else if (__n < __size)
|
|
this->erase(__n);
|
|
// else nothing (in particular, avoid calling _M_mutate() unnecessarily.)
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits, typename _Alloc>
|
|
template<typename _InputIterator>
|
|
basic_string<_CharT, _Traits, _Alloc>&
|
|
basic_string<_CharT, _Traits, _Alloc>::
|
|
_M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1,
|
|
_InputIterator __k2, __false_type)
|
|
{
|
|
const basic_string __s(__k1, __k2);
|
|
const size_type __n1 = __i2 - __i1;
|
|
_M_check_length(__n1, __s.size(), "basic_string::_M_replace_dispatch");
|
|
return _M_replace_safe(__i1 - _M_ibegin(), __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");
|
|
_M_mutate(__pos1, __n1, __n2);
|
|
if (__n2)
|
|
_M_assign(_M_data() + __pos1, __n2, __c);
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits, typename _Alloc>
|
|
basic_string<_CharT, _Traits, _Alloc>&
|
|
basic_string<_CharT, _Traits, _Alloc>::
|
|
_M_replace_safe(size_type __pos1, size_type __n1, const _CharT* __s,
|
|
size_type __n2)
|
|
{
|
|
_M_mutate(__pos1, __n1, __n2);
|
|
if (__n2)
|
|
_M_copy(_M_data() + __pos1, __s, __n2);
|
|
return *this;
|
|
}
|
|
|
|
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;
|
|
const __size_type __len = _Traits::length(__lhs);
|
|
__string_type __str;
|
|
__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;
|
|
__string_type __str;
|
|
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>::
|
|
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)
|
|
_M_copy(__s, _M_data() + __pos, __n);
|
|
// 21.3.5.7 par 3: do not append null. (good.)
|
|
return __n;
|
|
}
|
|
|
|
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_requires_string_len(__s, __n);
|
|
const size_type __size = this->size();
|
|
const _CharT* __data = _M_data();
|
|
|
|
if (__n == 0)
|
|
return __pos <= __size ? __pos : npos;
|
|
|
|
if (__n <= __size)
|
|
{
|
|
for (; __pos <= __size - __n; ++__pos)
|
|
if (traits_type::eq(__data[__pos], __s[0])
|
|
&& traits_type::compare(__data + __pos + 1,
|
|
__s + 1, __n - 1) == 0)
|
|
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(_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_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_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_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_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_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_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 (_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 > 0
|
|
extern template class basic_string<char>;
|
|
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
|
|
extern template class basic_string<wchar_t>;
|
|
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
|
|
#endif
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace std
|
|
|
|
#endif
|