0a7460199f
2004-04-21 Paolo Carlini <pcarlini@suse.de> Andrew Pinski <pinskia@physics.uc.edu> * include/bits/basic_string.tcc (_M_mutate): Don't compute __src unnecessarily. Co-Authored-By: Andrew Pinski <pinskia@physics.uc.edu> From-SVN: r80952
969 lines
33 KiB
C++
969 lines
33 KiB
C++
// Components for manipulating sequences of characters -*- C++ -*-
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// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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// 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 2, 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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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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//
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// ISO C++ 14882: 21 Strings library
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//
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// This file is included by <string>. It is not meant to be included
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// separately.
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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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namespace std
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{
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template<typename _Type>
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inline bool
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__is_null_pointer(_Type* __ptr)
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{ return __ptr == 0; }
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template<typename _Type>
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inline bool
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__is_null_pointer(_Type)
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{ return false; }
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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 (__beg == __end && __a == _Alloc())
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return _S_empty_rep()._M_refdata();
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// Avoid reallocation for common case.
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_CharT __buf[100];
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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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traits_type::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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traits_type::copy(__another->_M_refdata(),
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__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_length = __len;
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__r->_M_refdata()[__len] = _Rep::_S_terminal; // grrr.
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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 (__beg == __end && __a == _Alloc())
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return _S_empty_rep()._M_refdata();
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// NB: Not required, but considered best practice.
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if (__builtin_expect(__is_null_pointer(__beg), 0))
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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_length = __dnew;
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__r->_M_refdata()[__dnew] = _Rep::_S_terminal; // grrr.
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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 (__n == 0 && __a == _Alloc())
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return _S_empty_rep()._M_refdata();
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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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traits_type::assign(__r->_M_refdata(), __n, __c);
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__r->_M_length = __n;
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__r->_M_refdata()[__n] = _Rep::_S_terminal; // grrr
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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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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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if (__n > this->max_size())
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__throw_length_error(__N("basic_string::assign"));
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if (_M_rep()->_M_is_shared() || less<const _CharT*>()(__s, _M_data())
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|| less<const _CharT*>()(_M_data() + this->size(), __s))
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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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traits_type::copy(_M_data(), __s, __n);
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else if (__pos)
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traits_type::move(_M_data(), __s, __n);
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_M_rep()->_M_set_sharable();
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_M_rep()->_M_length = __n;
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_M_data()[__n] = _Rep::_S_terminal; // grr.
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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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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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if (this->max_size() - this->size() < __n)
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__throw_length_error(__N("basic_string::insert"));
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if (_M_rep()->_M_is_shared() || less<const _CharT*>()(__s, _M_data())
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|| less<const _CharT*>()(_M_data() + this->size(), __s))
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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. If _M_mutate reallocates the string, __s
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// does not point anymore to valid data, therefore we save its
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// offset, then we restore it.
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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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traits_type::copy(__p, __s, __n);
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else if (__s >= __p)
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traits_type::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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traits_type::copy(__p, __s, __nleft);
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traits_type::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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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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if (this->max_size() - (this->size() - __n1) < __n2)
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__throw_length_error(__N("basic_string::replace"));
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bool __left;
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if (_M_rep()->_M_is_shared() || less<const _CharT*>()(__s, _M_data())
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|| less<const _CharT*>()(_M_data() + this->size(), __s))
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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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const size_type __off = __s - _M_data();
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_M_mutate(__pos, __n1, __n2);
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if (__left)
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traits_type::copy(_M_data() + __pos,
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_M_data() + __off, __n2);
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else
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traits_type::copy(_M_data() + __pos,
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_M_data() + __off + __n2 - __n1, __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>
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void
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basic_string<_CharT, _Traits, _Alloc>::_Rep::
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_M_destroy(const _Alloc& __a) throw ()
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{
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if (this == &_S_empty_rep())
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return;
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const size_type __size = sizeof(_Rep_base) +
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(this->_M_capacity + 1) * sizeof(_CharT);
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_Raw_bytes_alloc(__a).deallocate(reinterpret_cast<char*>(this), __size);
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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void
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basic_string<_CharT, _Traits, _Alloc>::_M_leak_hard()
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{
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if (_M_rep() == &_S_empty_rep())
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return;
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if (_M_rep()->_M_is_shared())
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_M_mutate(0, 0, 0);
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_M_rep()->_M_set_leaked();
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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void
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basic_string<_CharT, _Traits, _Alloc>::
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_M_mutate(size_type __pos, size_type __len1, size_type __len2)
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{
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const size_type __old_size = this->size();
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const size_type __new_size = __old_size + __len2 - __len1;
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const size_type __how_much = __old_size - __pos - __len1;
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if (_M_rep() == &_S_empty_rep()
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|| _M_rep()->_M_is_shared() || __new_size > capacity())
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{
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// Must reallocate.
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const allocator_type __a = get_allocator();
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_Rep* __r = _Rep::_S_create(__new_size, capacity(), __a);
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if (__pos)
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traits_type::copy(__r->_M_refdata(), _M_data(), __pos);
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if (__how_much)
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traits_type::copy(__r->_M_refdata() + __pos + __len2,
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_M_data() + __pos + __len1, __how_much);
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_M_rep()->_M_dispose(__a);
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_M_data(__r->_M_refdata());
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}
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else if (__how_much && __len1 != __len2)
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{
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// Work in-place
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traits_type::move(_M_data() + __pos + __len2,
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_M_data() + __pos + __len1, __how_much);
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}
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_M_rep()->_M_set_sharable();
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_M_rep()->_M_length = __new_size;
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_M_data()[__new_size] = _Rep::_S_terminal; // grrr. (per 21.3.4)
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// You cannot leave those LWG people alone for a second.
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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void
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basic_string<_CharT, _Traits, _Alloc>::reserve(size_type __res)
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{
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if (__res != this->capacity() || _M_rep()->_M_is_shared())
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{
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if (__res > this->max_size())
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__throw_length_error(__N("basic_string::reserve"));
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// Make sure we don't shrink below the current size
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if (__res < this->size())
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__res = this->size();
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const allocator_type __a = get_allocator();
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_CharT* __tmp = _M_rep()->_M_clone(__a, __res - this->size());
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_M_rep()->_M_dispose(__a);
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_M_data(__tmp);
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}
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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void basic_string<_CharT, _Traits, _Alloc>::swap(basic_string& __s)
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{
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if (_M_rep()->_M_is_leaked())
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_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)
|
|
{
|
|
typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
|
|
// _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; // must be 2^i * __subpagesize
|
|
const size_type __subpagesize = 128; // should be >> __malloc_header_size
|
|
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
|
|
|
|
// The biggest string which fits in a memory page
|
|
const size_type __page_capacity = ((__pagesize - __malloc_header_size
|
|
- sizeof(_Rep) - sizeof(_CharT))
|
|
/ sizeof(_CharT));
|
|
|
|
if (__capacity > __old_capacity && __capacity < 2 * __old_capacity
|
|
&& __capacity > __page_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)
|
|
{
|
|
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);
|
|
}
|
|
else if (__size > __subpagesize)
|
|
{
|
|
const size_type __extra = __subpagesize - __adj_size % __subpagesize;
|
|
__capacity += __extra / sizeof(_CharT);
|
|
__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;
|
|
__p->_M_set_sharable(); // One reference.
|
|
__p->_M_length = 0;
|
|
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)
|
|
traits_type::copy(__r->_M_refdata(), _M_refdata(),
|
|
this->_M_length);
|
|
|
|
__r->_M_length = this->_M_length;
|
|
__r->_M_refdata()[this->_M_length] = _Rep::_S_terminal;
|
|
return __r->_M_refdata();
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits, typename _Alloc>
|
|
void
|
|
basic_string<_CharT, _Traits, _Alloc>::resize(size_type __n, _CharT __c)
|
|
{
|
|
if (__n > max_size())
|
|
__throw_length_error(__N("basic_string::resize"));
|
|
const size_type __size = this->size();
|
|
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;
|
|
if (this->max_size() - (this->size() - __n1) < __s.size())
|
|
__throw_length_error(__N("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>::
|
|
append(const basic_string& __str)
|
|
{
|
|
// Iff appending itself, string needs to pre-reserve the
|
|
// correct size so that _M_mutate does not clobber the
|
|
// pointer __str._M_data() formed here.
|
|
const size_type __size = __str.size();
|
|
const size_type __len = __size + this->size();
|
|
if (__len > this->capacity())
|
|
this->reserve(__len);
|
|
return _M_replace_safe(this->size(), size_type(0), __str._M_data(),
|
|
__str.size());
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits, typename _Alloc>
|
|
basic_string<_CharT, _Traits, _Alloc>&
|
|
basic_string<_CharT, _Traits, _Alloc>::
|
|
append(const basic_string& __str, size_type __pos, size_type __n)
|
|
{
|
|
// Iff appending itself, string needs to pre-reserve the
|
|
// correct size so that _M_mutate does not clobber the
|
|
// pointer __str._M_data() formed here.
|
|
__str._M_check(__pos, "basic_string::append");
|
|
__n = __str._M_limit(__pos, __n);
|
|
const size_type __len = __n + this->size();
|
|
if (__len > this->capacity())
|
|
this->reserve(__len);
|
|
return _M_replace_safe(this->size(), size_type(0), __str._M_data()
|
|
+ __pos, __n);
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits, typename _Alloc>
|
|
basic_string<_CharT, _Traits, _Alloc>&
|
|
basic_string<_CharT, _Traits, _Alloc>::
|
|
append(const _CharT* __s, size_type __n)
|
|
{
|
|
__glibcxx_requires_string_len(__s, __n);
|
|
const size_type __len = __n + this->size();
|
|
if (__len > this->capacity())
|
|
this->reserve(__len);
|
|
return _M_replace_safe(this->size(), size_type(0), __s, __n);
|
|
}
|
|
|
|
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)
|
|
traits_type::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();
|
|
for (; __pos + __n <= __size; ++__pos)
|
|
if (traits_type::compare(__data + __pos, __s, __n) == 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
|
|
{
|
|
const size_type __size = this->size();
|
|
size_type __ret = npos;
|
|
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
|
|
{
|
|
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
|
|
{
|
|
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
|
|
{
|
|
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 = __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 = __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 = __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 = __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 = __n1 - __n2;
|
|
return __r;
|
|
}
|
|
|
|
// Inhibit implicit instantiations for required instantiations,
|
|
// which are defined via explicit instantiations elsewhere.
|
|
// NB: This syntax is a GNU extension.
|
|
#if _GLIBCXX_EXTERN_TEMPLATE
|
|
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
|
|
} // namespace std
|
|
|
|
#endif
|