1211 lines
34 KiB
C++
1211 lines
34 KiB
C++
// istream classes -*- C++ -*-
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// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
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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: 27.6.2 Output streams
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//
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#pragma GCC system_header
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#include <locale>
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#include <ostream> // For flush()
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namespace std
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{
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>::sentry::
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sentry(basic_istream<_CharT, _Traits>& __in, bool __noskipws)
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{
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if (__in.good())
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{
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if (__in.tie())
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__in.tie()->flush();
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if (!__noskipws && (__in.flags() & ios_base::skipws))
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{
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const __int_type __eof = traits_type::eof();
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__streambuf_type* __sb = __in.rdbuf();
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__int_type __c = __sb->sgetc();
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if (__in._M_check_facet(__in._M_fctype))
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while (!traits_type::eq_int_type(__c, __eof)
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&& __in._M_fctype->is(ctype_base::space,
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traits_type::to_char_type(__c)))
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__c = __sb->snextc();
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#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
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//195. Should basic_istream::sentry's constructor ever set eofbit?
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if (traits_type::eq_int_type(__c, __eof))
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__in.setstate(ios_base::eofbit);
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#endif
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}
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}
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if (__in.good())
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_M_ok = true;
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else
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{
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_M_ok = false;
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__in.setstate(ios_base::failbit);
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}
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(__istream_type& (*__pf)(__istream_type&))
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{
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__pf(*this);
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return *this;
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(__ios_type& (*__pf)(__ios_type&))
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{
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__pf(*this);
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return *this;
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(ios_base& (*__pf)(ios_base&))
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{
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__pf(*this);
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return *this;
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(bool& __n)
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{
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sentry __cerb(*this, false);
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if (__cerb)
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{
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try
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{
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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if (_M_check_facet(this->_M_fnumget))
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this->_M_fnumget->get(*this, 0, *this, __err, __n);
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this->setstate(__err);
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}
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catch(exception& __fail)
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{
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// 27.6.1.2.1 Common requirements.
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// Turn this on without causing an ios::failure to be thrown.
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this->_M_setstate(ios_base::badbit);
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if ((this->exceptions() & ios_base::badbit) != 0)
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__throw_exception_again;
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}
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}
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return *this;
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(short& __n)
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{
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sentry __cerb(*this, false);
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if (__cerb)
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{
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try
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{
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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long __l;
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if (_M_check_facet(this->_M_fnumget))
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this->_M_fnumget->get(*this, 0, *this, __err, __l);
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#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
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// 118. basic_istream uses nonexistent num_get member functions.
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if (!(__err & ios_base::failbit)
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&& (numeric_limits<short>::min() <= __l
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&& __l <= numeric_limits<short>::max()))
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__n = __l;
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else
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__err |= ios_base::failbit;
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#endif
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this->setstate(__err);
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}
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catch(exception& __fail)
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{
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// 27.6.1.2.1 Common requirements.
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// Turn this on without causing an ios::failure to be thrown.
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this->_M_setstate(ios_base::badbit);
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if ((this->exceptions() & ios_base::badbit) != 0)
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__throw_exception_again;
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}
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}
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return *this;
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(unsigned short& __n)
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{
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sentry __cerb(*this, false);
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if (__cerb)
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{
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try
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{
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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if (_M_check_facet(this->_M_fnumget))
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this->_M_fnumget->get(*this, 0, *this, __err, __n);
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this->setstate(__err);
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}
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catch(exception& __fail)
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{
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// 27.6.1.2.1 Common requirements.
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// Turn this on without causing an ios::failure to be thrown.
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this->_M_setstate(ios_base::badbit);
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if ((this->exceptions() & ios_base::badbit) != 0)
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__throw_exception_again;
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}
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}
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return *this;
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(int& __n)
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{
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sentry __cerb(*this, false);
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if (__cerb)
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{
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try
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{
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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long __l;
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if (_M_check_facet(this->_M_fnumget))
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this->_M_fnumget->get(*this, 0, *this, __err, __l);
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#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
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// 118. basic_istream uses nonexistent num_get member functions.
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if (!(__err & ios_base::failbit)
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&& (numeric_limits<int>::min() <= __l
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&& __l <= numeric_limits<int>::max()))
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__n = __l;
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else
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__err |= ios_base::failbit;
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#endif
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this->setstate(__err);
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}
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catch(exception& __fail)
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{
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// 27.6.1.2.1 Common requirements.
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// Turn this on without causing an ios::failure to be thrown.
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this->_M_setstate(ios_base::badbit);
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if ((this->exceptions() & ios_base::badbit) != 0)
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__throw_exception_again;
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}
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}
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return *this;
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(unsigned int& __n)
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{
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sentry __cerb(*this, false);
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if (__cerb)
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{
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try
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{
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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if (_M_check_facet(this->_M_fnumget))
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this->_M_fnumget->get(*this, 0, *this, __err, __n);
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this->setstate(__err);
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}
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catch(exception& __fail)
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{
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// 27.6.1.2.1 Common requirements.
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// Turn this on without causing an ios::failure to be thrown.
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this->_M_setstate(ios_base::badbit);
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if ((this->exceptions() & ios_base::badbit) != 0)
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__throw_exception_again;
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}
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}
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return *this;
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(long& __n)
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{
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sentry __cerb(*this, false);
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if (__cerb)
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{
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try
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{
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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if (_M_check_facet(this->_M_fnumget))
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this->_M_fnumget->get(*this, 0, *this, __err, __n);
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this->setstate(__err);
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}
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catch(exception& __fail)
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{
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// 27.6.1.2.1 Common requirements.
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// Turn this on without causing an ios::failure to be thrown.
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this->_M_setstate(ios_base::badbit);
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if ((this->exceptions() & ios_base::badbit) != 0)
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__throw_exception_again;
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}
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}
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return *this;
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(unsigned long& __n)
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{
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sentry __cerb(*this, false);
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if (__cerb)
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{
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try
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{
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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if (_M_check_facet(this->_M_fnumget))
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this->_M_fnumget->get(*this, 0, *this, __err, __n);
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this->setstate(__err);
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}
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catch(exception& __fail)
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{
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// 27.6.1.2.1 Common requirements.
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// Turn this on without causing an ios::failure to be thrown.
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this->_M_setstate(ios_base::badbit);
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if ((this->exceptions() & ios_base::badbit) != 0)
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__throw_exception_again;
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}
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}
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return *this;
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}
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#ifdef _GLIBCPP_USE_LONG_LONG
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(long long& __n)
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{
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sentry __cerb(*this, false);
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if (__cerb)
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{
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try
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{
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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if (_M_check_facet(this->_M_fnumget))
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this->_M_fnumget->get(*this, 0, *this, __err, __n);
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this->setstate(__err);
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}
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catch(exception& __fail)
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{
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// 27.6.1.2.1 Common requirements.
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// Turn this on without causing an ios::failure to be thrown.
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this->_M_setstate(ios_base::badbit);
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if ((this->exceptions() & ios_base::badbit) != 0)
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__throw_exception_again;
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}
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}
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return *this;
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(unsigned long long& __n)
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{
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sentry __cerb(*this, false);
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if (__cerb)
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{
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try
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{
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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if (_M_check_facet(this->_M_fnumget))
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this->_M_fnumget->get(*this, 0, *this, __err, __n);
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this->setstate(__err);
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}
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catch(exception& __fail)
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{
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// 27.6.1.2.1 Common requirements.
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// Turn this on without causing an ios::failure to be thrown.
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this->_M_setstate(ios_base::badbit);
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if ((this->exceptions() & ios_base::badbit) != 0)
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__throw_exception_again;
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}
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}
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return *this;
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}
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#endif
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(float& __n)
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{
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sentry __cerb(*this, false);
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if (__cerb)
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{
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try
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{
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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if (_M_check_facet(this->_M_fnumget))
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this->_M_fnumget->get(*this, 0, *this, __err, __n);
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this->setstate(__err);
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}
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catch(exception& __fail)
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{
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// 27.6.1.2.1 Common requirements.
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// Turn this on without causing an ios::failure to be thrown.
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this->_M_setstate(ios_base::badbit);
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if ((this->exceptions() & ios_base::badbit) != 0)
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__throw_exception_again;
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}
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}
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return *this;
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(double& __n)
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{
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sentry __cerb(*this, false);
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if (__cerb)
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{
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try
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{
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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if (_M_check_facet(this->_M_fnumget))
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this->_M_fnumget->get(*this, 0, *this, __err, __n);
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this->setstate(__err);
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}
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catch(exception& __fail)
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{
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// 27.6.1.2.1 Common requirements.
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// Turn this on without causing an ios::failure to be thrown.
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this->_M_setstate(ios_base::badbit);
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if ((this->exceptions() & ios_base::badbit) != 0)
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__throw_exception_again;
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}
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}
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return *this;
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}
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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operator>>(long double& __n)
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{
|
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sentry __cerb(*this, false);
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if (__cerb)
|
|
{
|
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try
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{
|
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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if (_M_check_facet(this->_M_fnumget))
|
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this->_M_fnumget->get(*this, 0, *this, __err, __n);
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this->setstate(__err);
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|
}
|
|
catch(exception& __fail)
|
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{
|
|
// 27.6.1.2.1 Common requirements.
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|
// Turn this on without causing an ios::failure to be thrown.
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this->_M_setstate(ios_base::badbit);
|
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if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
return *this;
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|
}
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|
|
|
template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
|
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operator>>(void*& __n)
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{
|
|
sentry __cerb(*this, false);
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if (__cerb)
|
|
{
|
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try
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{
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ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
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if (_M_check_facet(this->_M_fnumget))
|
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this->_M_fnumget->get(*this, 0, *this, __err, __n);
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this->setstate(__err);
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|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.2.1 Common requirements.
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
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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>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
|
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operator>>(__streambuf_type* __sbout)
|
|
{
|
|
sentry __cerb(*this, false);
|
|
if (__cerb)
|
|
{
|
|
try
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|
{
|
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streamsize __xtrct = 0;
|
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if (__sbout)
|
|
{
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__streambuf_type* __sbin = this->rdbuf();
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__xtrct = __copy_streambufs(*this, __sbin, __sbout);
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}
|
|
if (!__sbout || !__xtrct)
|
|
this->setstate(ios_base::failbit);
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|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.2.5.1 Common requirements.
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
typename basic_istream<_CharT, _Traits>::int_type
|
|
basic_istream<_CharT, _Traits>::
|
|
get(void)
|
|
{
|
|
const int_type __eof = traits_type::eof();
|
|
int_type __c = __eof;
|
|
_M_gcount = 0;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{
|
|
__c = this->rdbuf()->sbumpc();
|
|
// 27.6.1.1 paragraph 3
|
|
if (!traits_type::eq_int_type(__c, __eof))
|
|
_M_gcount = 1;
|
|
else
|
|
this->setstate(ios_base::eofbit | ios_base::failbit);
|
|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.3 paragraph 1
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
return __c;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
get(char_type& __c)
|
|
{
|
|
_M_gcount = 0;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{
|
|
const int_type __eof = traits_type::eof();
|
|
int_type __bufval = this->rdbuf()->sbumpc();
|
|
// 27.6.1.1 paragraph 3
|
|
if (!traits_type::eq_int_type(__bufval, __eof))
|
|
{
|
|
_M_gcount = 1;
|
|
__c = traits_type::to_char_type(__bufval);
|
|
}
|
|
else
|
|
this->setstate(ios_base::eofbit | ios_base::failbit);
|
|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.3 paragraph 1
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
get(char_type* __s, streamsize __n, char_type __delim)
|
|
{
|
|
_M_gcount = 0;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{
|
|
const int_type __idelim = traits_type::to_int_type(__delim);
|
|
const int_type __eof = traits_type::eof();
|
|
__streambuf_type* __sb = this->rdbuf();
|
|
int_type __c = __sb->sgetc();
|
|
|
|
while (_M_gcount + 1 < __n
|
|
&& !traits_type::eq_int_type(__c, __eof)
|
|
&& !traits_type::eq_int_type(__c, __idelim))
|
|
{
|
|
*__s++ = traits_type::to_char_type(__c);
|
|
__c = __sb->snextc();
|
|
++_M_gcount;
|
|
}
|
|
if (traits_type::eq_int_type(__c, __eof))
|
|
this->setstate(ios_base::eofbit);
|
|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.3 paragraph 1
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
*__s = char_type();
|
|
if (!_M_gcount)
|
|
this->setstate(ios_base::failbit);
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
get(__streambuf_type& __sb, char_type __delim)
|
|
{
|
|
_M_gcount = 0;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{
|
|
const int_type __idelim = traits_type::to_int_type(__delim);
|
|
const int_type __eof = traits_type::eof();
|
|
__streambuf_type* __this_sb = this->rdbuf();
|
|
int_type __c = __this_sb->sgetc();
|
|
char_type __c2 = traits_type::to_char_type(__c);
|
|
|
|
while (!traits_type::eq_int_type(__c, __eof)
|
|
&& !traits_type::eq_int_type(__c, __idelim)
|
|
&& !traits_type::eq_int_type(__sb.sputc(__c2), __eof))
|
|
{
|
|
++_M_gcount;
|
|
__c = __this_sb->snextc();
|
|
__c2 = traits_type::to_char_type(__c);
|
|
}
|
|
if (traits_type::eq_int_type(__c, __eof))
|
|
this->setstate(ios_base::eofbit);
|
|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.3 paragraph 1
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
if (!_M_gcount)
|
|
this->setstate(ios_base::failbit);
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
getline(char_type* __s, streamsize __n, char_type __delim)
|
|
{
|
|
_M_gcount = 0;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{
|
|
const int_type __idelim = traits_type::to_int_type(__delim);
|
|
const int_type __eof = traits_type::eof();
|
|
__streambuf_type* __sb = this->rdbuf();
|
|
int_type __c = __sb->sgetc();
|
|
|
|
while (_M_gcount + 1 < __n
|
|
&& !traits_type::eq_int_type(__c, __eof)
|
|
&& !traits_type::eq_int_type(__c, __idelim))
|
|
{
|
|
*__s++ = traits_type::to_char_type(__c);
|
|
__c = __sb->snextc();
|
|
++_M_gcount;
|
|
}
|
|
if (traits_type::eq_int_type(__c, __eof))
|
|
this->setstate(ios_base::eofbit);
|
|
else
|
|
{
|
|
if (traits_type::eq_int_type(__c, __idelim))
|
|
{
|
|
__sb->sbumpc();
|
|
++_M_gcount;
|
|
}
|
|
else
|
|
this->setstate(ios_base::failbit);
|
|
}
|
|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.3 paragraph 1
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
*__s = char_type();
|
|
if (!_M_gcount)
|
|
this->setstate(ios_base::failbit);
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
ignore(streamsize __n, int_type __delim)
|
|
{
|
|
_M_gcount = 0;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb && __n > 0)
|
|
{
|
|
try
|
|
{
|
|
const int_type __eof = traits_type::eof();
|
|
__streambuf_type* __sb = this->rdbuf();
|
|
int_type __c;
|
|
|
|
__n = std::min(__n, numeric_limits<streamsize>::max());
|
|
while (_M_gcount < __n
|
|
&& !traits_type::eq_int_type(__c = __sb->sbumpc(), __eof))
|
|
{
|
|
++_M_gcount;
|
|
if (traits_type::eq_int_type(__c, __delim))
|
|
break;
|
|
}
|
|
if (traits_type::eq_int_type(__c, __eof))
|
|
this->setstate(ios_base::eofbit);
|
|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.3 paragraph 1
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
typename basic_istream<_CharT, _Traits>::int_type
|
|
basic_istream<_CharT, _Traits>::
|
|
peek(void)
|
|
{
|
|
int_type __c = traits_type::eof();
|
|
_M_gcount = 0;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{ __c = this->rdbuf()->sgetc(); }
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.3 paragraph 1
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
return __c;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
read(char_type* __s, streamsize __n)
|
|
{
|
|
_M_gcount = 0;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{
|
|
_M_gcount = this->rdbuf()->sgetn(__s, __n);
|
|
if (_M_gcount != __n)
|
|
this->setstate(ios_base::eofbit | ios_base::failbit);
|
|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.3 paragraph 1
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
else
|
|
this->setstate(ios_base::failbit);
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
streamsize
|
|
basic_istream<_CharT, _Traits>::
|
|
readsome(char_type* __s, streamsize __n)
|
|
{
|
|
_M_gcount = 0;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{
|
|
// Cannot compare int_type with streamsize generically.
|
|
streamsize __num = this->rdbuf()->in_avail();
|
|
if (__num >= 0)
|
|
{
|
|
__num = std::min(__num, __n);
|
|
if (__num)
|
|
_M_gcount = this->rdbuf()->sgetn(__s, __num);
|
|
}
|
|
else
|
|
this->setstate(ios_base::eofbit);
|
|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.3 paragraph 1
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
else
|
|
this->setstate(ios_base::failbit);
|
|
return _M_gcount;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
putback(char_type __c)
|
|
{
|
|
_M_gcount = 0;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{
|
|
const int_type __eof = traits_type::eof();
|
|
__streambuf_type* __sb = this->rdbuf();
|
|
if (!__sb
|
|
|| traits_type::eq_int_type(__sb->sputbackc(__c), __eof))
|
|
this->setstate(ios_base::badbit);
|
|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.3 paragraph 1
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
else
|
|
this->setstate(ios_base::failbit);
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
unget(void)
|
|
{
|
|
_M_gcount = 0;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{
|
|
const int_type __eof = traits_type::eof();
|
|
__streambuf_type* __sb = this->rdbuf();
|
|
if (!__sb
|
|
|| traits_type::eq_int_type(__sb->sungetc(), __eof))
|
|
this->setstate(ios_base::badbit);
|
|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.3 paragraph 1
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
else
|
|
this->setstate(ios_base::failbit);
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
int
|
|
basic_istream<_CharT, _Traits>::
|
|
sync(void)
|
|
{
|
|
int __ret = -1;
|
|
_M_gcount = 0;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{
|
|
__streambuf_type* __sb = this->rdbuf();
|
|
if (__sb)
|
|
{
|
|
if (__sb->pubsync() == -1)
|
|
this->setstate(ios_base::badbit);
|
|
else
|
|
__ret = 0;
|
|
}
|
|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.3 paragraph 1
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
this->_M_setstate(ios_base::badbit);
|
|
if ((this->exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
return __ret;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
typename basic_istream<_CharT, _Traits>::pos_type
|
|
basic_istream<_CharT, _Traits>::
|
|
tellg(void)
|
|
{
|
|
pos_type __ret = pos_type(-1);
|
|
if (!this->fail())
|
|
__ret = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::in);
|
|
return __ret;
|
|
}
|
|
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
seekg(pos_type __pos)
|
|
{
|
|
_M_gcount = 0;
|
|
if (!this->fail())
|
|
{
|
|
#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
|
|
// 136. seekp, seekg setting wrong streams?
|
|
pos_type __err = this->rdbuf()->pubseekpos(__pos, ios_base::in);
|
|
|
|
// 129. Need error indication from seekp() and seekg()
|
|
if (__err == pos_type(off_type(-1)))
|
|
this->setstate(ios_base::failbit);
|
|
#endif
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
seekg(off_type __off, ios_base::seekdir __dir)
|
|
{
|
|
_M_gcount = 0;
|
|
if (!this->fail())
|
|
{
|
|
#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
|
|
// 136. seekp, seekg setting wrong streams?
|
|
pos_type __err = this->rdbuf()->pubseekoff(__off, __dir,
|
|
ios_base::in);
|
|
|
|
// 129. Need error indication from seekp() and seekg()
|
|
if (__err == pos_type(off_type(-1)))
|
|
this->setstate(ios_base::failbit);
|
|
#endif
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
// 27.6.1.2.3 Character extraction templates
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
|
|
{
|
|
typedef basic_istream<_CharT, _Traits> __istream_type;
|
|
typename __istream_type::sentry __cerb(__in, false);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{ __in.get(__c); }
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.2.1 Common requirements.
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
__in._M_setstate(ios_base::badbit);
|
|
if ((__in.exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
else
|
|
__in.setstate(ios_base::failbit);
|
|
return __in;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
|
|
{
|
|
typedef basic_istream<_CharT, _Traits> __istream_type;
|
|
typedef typename __istream_type::__streambuf_type __streambuf_type;
|
|
typedef typename _Traits::int_type int_type;
|
|
typedef _CharT char_type;
|
|
typedef ctype<_CharT> __ctype_type;
|
|
streamsize __extracted = 0;
|
|
|
|
typename __istream_type::sentry __cerb(__in, false);
|
|
if (__cerb)
|
|
{
|
|
try
|
|
{
|
|
// Figure out how many characters to extract.
|
|
streamsize __num = __in.width();
|
|
if (__num == 0)
|
|
__num = numeric_limits<streamsize>::max();
|
|
|
|
const __ctype_type& __ctype = use_facet<__ctype_type>(__in.getloc());
|
|
const int_type __eof = _Traits::eof();
|
|
__streambuf_type* __sb = __in.rdbuf();
|
|
int_type __c = __sb->sgetc();
|
|
|
|
while (__extracted < __num - 1
|
|
&& !_Traits::eq_int_type(__c, __eof)
|
|
&& !__ctype.is(ctype_base::space, _Traits::to_char_type(__c)))
|
|
{
|
|
*__s++ = _Traits::to_char_type(__c);
|
|
++__extracted;
|
|
__c = __sb->snextc();
|
|
}
|
|
if (_Traits::eq_int_type(__c, __eof))
|
|
__in.setstate(ios_base::eofbit);
|
|
|
|
#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
|
|
//68. Extractors for char* should store null at end
|
|
*__s = char_type();
|
|
#endif
|
|
__in.width(0);
|
|
}
|
|
catch(exception& __fail)
|
|
{
|
|
// 27.6.1.2.1 Common requirements.
|
|
// Turn this on without causing an ios::failure to be thrown.
|
|
__in._M_setstate(ios_base::badbit);
|
|
if ((__in.exceptions() & ios_base::badbit) != 0)
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
if (!__extracted)
|
|
__in.setstate(ios_base::failbit);
|
|
return __in;
|
|
}
|
|
|
|
// 27.6.1.4 Standard basic_istream manipulators
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT,_Traits>&
|
|
ws(basic_istream<_CharT,_Traits>& __in)
|
|
{
|
|
typedef basic_istream<_CharT, _Traits> __istream_type;
|
|
typedef typename __istream_type::__streambuf_type __streambuf_type;
|
|
typedef typename __istream_type::__ctype_type __ctype_type;
|
|
typedef typename __istream_type::int_type __int_type;
|
|
|
|
const __ctype_type& __ctype = use_facet<__ctype_type>(__in.getloc());
|
|
const __int_type __eof = _Traits::eof();
|
|
__streambuf_type* __sb = __in.rdbuf();
|
|
__int_type __c = __sb->sgetc();
|
|
|
|
while (!_Traits::eq_int_type(__c, __eof)
|
|
&& __ctype.is(ctype_base::space, _Traits::to_char_type(__c)))
|
|
__c = __sb->snextc();
|
|
|
|
if (_Traits::eq_int_type(__c, __eof))
|
|
__in.setstate(ios_base::eofbit);
|
|
|
|
return __in;
|
|
}
|
|
|
|
// 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 typename __istream_type::int_type __int_type;
|
|
typedef typename __istream_type::__streambuf_type __streambuf_type;
|
|
typedef typename __istream_type::__ctype_type __ctype_type;
|
|
typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
|
|
typedef typename __string_type::size_type __size_type;
|
|
__size_type __extracted = 0;
|
|
|
|
typename __istream_type::sentry __cerb(__in, false);
|
|
if (__cerb)
|
|
{
|
|
__str.erase();
|
|
streamsize __w = __in.width();
|
|
__size_type __n;
|
|
__n = __w > 0 ? static_cast<__size_type>(__w) : __str.max_size();
|
|
|
|
const __ctype_type& __ctype = use_facet<__ctype_type>(__in.getloc());
|
|
const __int_type __eof = _Traits::eof();
|
|
__streambuf_type* __sb = __in.rdbuf();
|
|
__int_type __c = __sb->sgetc();
|
|
|
|
while (__extracted < __n
|
|
&& !_Traits::eq_int_type(__c, __eof)
|
|
&& !__ctype.is(ctype_base::space, _Traits::to_char_type(__c)))
|
|
{
|
|
__str += _Traits::to_char_type(__c);
|
|
++__extracted;
|
|
__c = __sb->snextc();
|
|
}
|
|
if (_Traits::eq_int_type(__c, __eof))
|
|
__in.setstate(ios_base::eofbit);
|
|
__in.width(0);
|
|
}
|
|
#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
|
|
//211. operator>>(istream&, string&) doesn't set failbit
|
|
if (!__extracted)
|
|
__in.setstate (ios_base::failbit);
|
|
#endif
|
|
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 typename __istream_type::int_type __int_type;
|
|
typedef typename __istream_type::__streambuf_type __streambuf_type;
|
|
typedef typename __istream_type::__ctype_type __ctype_type;
|
|
typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
|
|
typedef typename __string_type::size_type __size_type;
|
|
|
|
__size_type __extracted = 0;
|
|
bool __testdelim = false;
|
|
typename __istream_type::sentry __cerb(__in, true);
|
|
if (__cerb)
|
|
{
|
|
__str.erase();
|
|
__size_type __n = __str.max_size();
|
|
|
|
__int_type __idelim = _Traits::to_int_type(__delim);
|
|
__streambuf_type* __sb = __in.rdbuf();
|
|
__int_type __c = __sb->sbumpc();
|
|
const __int_type __eof = _Traits::eof();
|
|
__testdelim = _Traits::eq_int_type(__c, __idelim);
|
|
|
|
while (__extracted <= __n
|
|
&& !_Traits::eq_int_type(__c, __eof)
|
|
&& !__testdelim)
|
|
{
|
|
__str += _Traits::to_char_type(__c);
|
|
++__extracted;
|
|
__c = __sb->sbumpc();
|
|
__testdelim = _Traits::eq_int_type(__c, __idelim);
|
|
}
|
|
if (_Traits::eq_int_type(__c, __eof))
|
|
__in.setstate(ios_base::eofbit);
|
|
}
|
|
if (!__extracted && !__testdelim)
|
|
__in.setstate(ios_base::failbit);
|
|
return __in;
|
|
}
|
|
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
inline basic_istream<_CharT,_Traits>&
|
|
getline(basic_istream<_CharT, _Traits>& __in,
|
|
basic_string<_CharT,_Traits,_Alloc>& __str)
|
|
{ return getline(__in, __str, __in.widen('\n')); }
|
|
|
|
// Inhibit implicit instantiations for required instantiations,
|
|
// which are defined via explicit instantiations elsewhere.
|
|
// NB: This syntax is a GNU extension.
|
|
#if _GLIBCPP_EXTERN_TEMPLATE
|
|
extern template class basic_istream<char>;
|
|
extern template istream& ws(istream&);
|
|
extern template istream& operator>>(istream&, char&);
|
|
extern template istream& operator>>(istream&, char*);
|
|
extern template istream& operator>>(istream&, unsigned char&);
|
|
extern template istream& operator>>(istream&, signed char&);
|
|
extern template istream& operator>>(istream&, unsigned char*);
|
|
extern template istream& operator>>(istream&, signed char*);
|
|
|
|
#ifdef _GLIBCPP_USE_WCHAR_T
|
|
extern template class basic_istream<wchar_t>;
|
|
extern template wistream& ws(wistream&);
|
|
extern template wistream& operator>>(wistream&, wchar_t&);
|
|
extern template wistream& operator>>(wistream&, wchar_t*);
|
|
#endif
|
|
#endif
|
|
} // namespace std
|