1093 lines
30 KiB
C++
1093 lines
30 KiB
C++
// istream classes -*- C++ -*-
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// Copyright (C) 1997-2015 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file bits/istream.tcc
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{istream}
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*/
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//
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// ISO C++ 14882: 27.6.1 Input streams
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//
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#ifndef _ISTREAM_TCC
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#define _ISTREAM_TCC 1
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#pragma GCC system_header
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#include <bits/cxxabi_forced.h>
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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template<typename _CharT, typename _Traits>
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basic_istream<_CharT, _Traits>::sentry::
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sentry(basic_istream<_CharT, _Traits>& __in, bool __noskip) : _M_ok(false)
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{
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ios_base::iostate __err = ios_base::goodbit;
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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 (!__noskip && bool(__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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const __ctype_type& __ct = __check_facet(__in._M_ctype);
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while (!traits_type::eq_int_type(__c, __eof)
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&& __ct.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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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 195. Should basic_istream::sentry's constructor ever
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// set eofbit?
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if (traits_type::eq_int_type(__c, __eof))
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__err |= ios_base::eofbit;
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}
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}
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if (__in.good() && __err == ios_base::goodbit)
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_M_ok = true;
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else
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{
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__err |= ios_base::failbit;
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__in.setstate(__err);
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}
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}
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template<typename _CharT, typename _Traits>
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template<typename _ValueT>
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basic_istream<_CharT, _Traits>&
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basic_istream<_CharT, _Traits>::
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_M_extract(_ValueT& __v)
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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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ios_base::iostate __err = ios_base::goodbit;
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__try
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{
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const __num_get_type& __ng = __check_facet(this->_M_num_get);
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__ng.get(*this, 0, *this, __err, __v);
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}
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__catch(__cxxabiv1::__forced_unwind&)
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{
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this->_M_setstate(ios_base::badbit);
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__throw_exception_again;
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}
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__catch(...)
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{ this->_M_setstate(ios_base::badbit); }
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if (__err)
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this->setstate(__err);
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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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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 118. basic_istream uses nonexistent num_get member functions.
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sentry __cerb(*this, false);
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if (__cerb)
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{
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ios_base::iostate __err = ios_base::goodbit;
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__try
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{
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long __l;
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const __num_get_type& __ng = __check_facet(this->_M_num_get);
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__ng.get(*this, 0, *this, __err, __l);
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 696. istream::operator>>(int&) broken.
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if (__l < __gnu_cxx::__numeric_traits<short>::__min)
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{
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__err |= ios_base::failbit;
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__n = __gnu_cxx::__numeric_traits<short>::__min;
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}
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else if (__l > __gnu_cxx::__numeric_traits<short>::__max)
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{
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__err |= ios_base::failbit;
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__n = __gnu_cxx::__numeric_traits<short>::__max;
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}
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else
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__n = short(__l);
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}
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__catch(__cxxabiv1::__forced_unwind&)
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{
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this->_M_setstate(ios_base::badbit);
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__throw_exception_again;
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}
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__catch(...)
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{ this->_M_setstate(ios_base::badbit); }
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if (__err)
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this->setstate(__err);
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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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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 118. basic_istream uses nonexistent num_get member functions.
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sentry __cerb(*this, false);
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if (__cerb)
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{
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ios_base::iostate __err = ios_base::goodbit;
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__try
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{
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long __l;
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const __num_get_type& __ng = __check_facet(this->_M_num_get);
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__ng.get(*this, 0, *this, __err, __l);
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 696. istream::operator>>(int&) broken.
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if (__l < __gnu_cxx::__numeric_traits<int>::__min)
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{
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__err |= ios_base::failbit;
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__n = __gnu_cxx::__numeric_traits<int>::__min;
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}
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else if (__l > __gnu_cxx::__numeric_traits<int>::__max)
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{
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__err |= ios_base::failbit;
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__n = __gnu_cxx::__numeric_traits<int>::__max;
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}
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else
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__n = int(__l);
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}
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__catch(__cxxabiv1::__forced_unwind&)
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{
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this->_M_setstate(ios_base::badbit);
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__throw_exception_again;
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}
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__catch(...)
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{ this->_M_setstate(ios_base::badbit); }
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if (__err)
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this->setstate(__err);
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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>>(__streambuf_type* __sbout)
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{
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ios_base::iostate __err = ios_base::goodbit;
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sentry __cerb(*this, false);
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if (__cerb && __sbout)
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{
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__try
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{
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bool __ineof;
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if (!__copy_streambufs_eof(this->rdbuf(), __sbout, __ineof))
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__err |= ios_base::failbit;
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if (__ineof)
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__err |= ios_base::eofbit;
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}
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__catch(__cxxabiv1::__forced_unwind&)
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{
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this->_M_setstate(ios_base::failbit);
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__throw_exception_again;
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}
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__catch(...)
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{ this->_M_setstate(ios_base::failbit); }
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}
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else if (!__sbout)
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__err |= ios_base::failbit;
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if (__err)
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this->setstate(__err);
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return *this;
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}
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template<typename _CharT, typename _Traits>
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typename basic_istream<_CharT, _Traits>::int_type
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basic_istream<_CharT, _Traits>::
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get(void)
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{
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const int_type __eof = traits_type::eof();
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int_type __c = __eof;
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_M_gcount = 0;
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ios_base::iostate __err = ios_base::goodbit;
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sentry __cerb(*this, true);
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if (__cerb)
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{
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__try
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{
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__c = this->rdbuf()->sbumpc();
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// 27.6.1.1 paragraph 3
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if (!traits_type::eq_int_type(__c, __eof))
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_M_gcount = 1;
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else
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__err |= ios_base::eofbit;
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}
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__catch(__cxxabiv1::__forced_unwind&)
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{
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this->_M_setstate(ios_base::badbit);
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__throw_exception_again;
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}
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__catch(...)
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{ this->_M_setstate(ios_base::badbit); }
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}
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if (!_M_gcount)
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__err |= ios_base::failbit;
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if (__err)
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this->setstate(__err);
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return __c;
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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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get(char_type& __c)
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{
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_M_gcount = 0;
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ios_base::iostate __err = ios_base::goodbit;
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sentry __cerb(*this, true);
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if (__cerb)
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{
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__try
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{
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const int_type __cb = this->rdbuf()->sbumpc();
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// 27.6.1.1 paragraph 3
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if (!traits_type::eq_int_type(__cb, traits_type::eof()))
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{
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_M_gcount = 1;
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__c = traits_type::to_char_type(__cb);
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}
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else
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__err |= ios_base::eofbit;
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}
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__catch(__cxxabiv1::__forced_unwind&)
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{
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this->_M_setstate(ios_base::badbit);
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__throw_exception_again;
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}
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__catch(...)
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{ this->_M_setstate(ios_base::badbit); }
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}
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if (!_M_gcount)
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__err |= ios_base::failbit;
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if (__err)
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this->setstate(__err);
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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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get(char_type* __s, streamsize __n, char_type __delim)
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{
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_M_gcount = 0;
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ios_base::iostate __err = ios_base::goodbit;
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sentry __cerb(*this, true);
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if (__cerb)
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{
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__try
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{
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const int_type __idelim = traits_type::to_int_type(__delim);
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const int_type __eof = traits_type::eof();
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__streambuf_type* __sb = this->rdbuf();
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int_type __c = __sb->sgetc();
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while (_M_gcount + 1 < __n
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&& !traits_type::eq_int_type(__c, __eof)
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&& !traits_type::eq_int_type(__c, __idelim))
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{
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*__s++ = traits_type::to_char_type(__c);
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++_M_gcount;
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__c = __sb->snextc();
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}
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if (traits_type::eq_int_type(__c, __eof))
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__err |= ios_base::eofbit;
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}
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__catch(__cxxabiv1::__forced_unwind&)
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{
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this->_M_setstate(ios_base::badbit);
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__throw_exception_again;
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}
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__catch(...)
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{ this->_M_setstate(ios_base::badbit); }
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}
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 243. get and getline when sentry reports failure.
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if (__n > 0)
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*__s = char_type();
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if (!_M_gcount)
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__err |= ios_base::failbit;
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if (__err)
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this->setstate(__err);
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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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get(__streambuf_type& __sb, char_type __delim)
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{
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_M_gcount = 0;
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ios_base::iostate __err = ios_base::goodbit;
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sentry __cerb(*this, true);
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if (__cerb)
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{
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__try
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{
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const int_type __idelim = traits_type::to_int_type(__delim);
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const int_type __eof = traits_type::eof();
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__streambuf_type* __this_sb = this->rdbuf();
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int_type __c = __this_sb->sgetc();
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char_type __c2 = traits_type::to_char_type(__c);
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while (!traits_type::eq_int_type(__c, __eof)
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&& !traits_type::eq_int_type(__c, __idelim)
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&& !traits_type::eq_int_type(__sb.sputc(__c2), __eof))
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{
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++_M_gcount;
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__c = __this_sb->snextc();
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__c2 = traits_type::to_char_type(__c);
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}
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if (traits_type::eq_int_type(__c, __eof))
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__err |= ios_base::eofbit;
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}
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__catch(__cxxabiv1::__forced_unwind&)
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{
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this->_M_setstate(ios_base::badbit);
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__throw_exception_again;
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}
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__catch(...)
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{ this->_M_setstate(ios_base::badbit); }
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}
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if (!_M_gcount)
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__err |= ios_base::failbit;
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if (__err)
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this->setstate(__err);
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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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getline(char_type* __s, streamsize __n, char_type __delim)
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{
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_M_gcount = 0;
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ios_base::iostate __err = ios_base::goodbit;
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sentry __cerb(*this, true);
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if (__cerb)
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{
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__try
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{
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const int_type __idelim = traits_type::to_int_type(__delim);
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const int_type __eof = traits_type::eof();
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__streambuf_type* __sb = this->rdbuf();
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int_type __c = __sb->sgetc();
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while (_M_gcount + 1 < __n
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&& !traits_type::eq_int_type(__c, __eof)
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&& !traits_type::eq_int_type(__c, __idelim))
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{
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*__s++ = traits_type::to_char_type(__c);
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__c = __sb->snextc();
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++_M_gcount;
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}
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if (traits_type::eq_int_type(__c, __eof))
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__err |= ios_base::eofbit;
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else
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{
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if (traits_type::eq_int_type(__c, __idelim))
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{
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__sb->sbumpc();
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++_M_gcount;
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}
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else
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__err |= ios_base::failbit;
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}
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}
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__catch(__cxxabiv1::__forced_unwind&)
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{
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this->_M_setstate(ios_base::badbit);
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__throw_exception_again;
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}
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__catch(...)
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{ this->_M_setstate(ios_base::badbit); }
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}
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 243. get and getline when sentry reports failure.
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if (__n > 0)
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*__s = char_type();
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if (!_M_gcount)
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__err |= ios_base::failbit;
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if (__err)
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this->setstate(__err);
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return *this;
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}
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// We provide three overloads, since the first two are much simpler
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// than the general case. Also, the latter two can thus adopt the
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// same "batchy" strategy used by getline above.
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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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ignore(void)
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{
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_M_gcount = 0;
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sentry __cerb(*this, true);
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if (__cerb)
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{
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ios_base::iostate __err = ios_base::goodbit;
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__try
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{
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const int_type __eof = traits_type::eof();
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__streambuf_type* __sb = this->rdbuf();
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if (traits_type::eq_int_type(__sb->sbumpc(), __eof))
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__err |= ios_base::eofbit;
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else
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_M_gcount = 1;
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}
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__catch(__cxxabiv1::__forced_unwind&)
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{
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this->_M_setstate(ios_base::badbit);
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__throw_exception_again;
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}
|
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__catch(...)
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{ this->_M_setstate(ios_base::badbit); }
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|
if (__err)
|
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this->setstate(__err);
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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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ignore(streamsize __n)
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{
|
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_M_gcount = 0;
|
|
sentry __cerb(*this, true);
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if (__cerb && __n > 0)
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{
|
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ios_base::iostate __err = ios_base::goodbit;
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__try
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{
|
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const int_type __eof = traits_type::eof();
|
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__streambuf_type* __sb = this->rdbuf();
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int_type __c = __sb->sgetc();
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|
|
// N.B. On LFS-enabled platforms streamsize is still 32 bits
|
|
// wide: if we want to implement the standard mandated behavior
|
|
// for n == max() (see 27.6.1.3/24) we are at risk of signed
|
|
// integer overflow: thus these contortions. Also note that,
|
|
// by definition, when more than 2G chars are actually ignored,
|
|
// _M_gcount (the return value of gcount, that is) cannot be
|
|
// really correct, being unavoidably too small.
|
|
bool __large_ignore = false;
|
|
while (true)
|
|
{
|
|
while (_M_gcount < __n
|
|
&& !traits_type::eq_int_type(__c, __eof))
|
|
{
|
|
++_M_gcount;
|
|
__c = __sb->snextc();
|
|
}
|
|
if (__n == __gnu_cxx::__numeric_traits<streamsize>::__max
|
|
&& !traits_type::eq_int_type(__c, __eof))
|
|
{
|
|
_M_gcount =
|
|
__gnu_cxx::__numeric_traits<streamsize>::__min;
|
|
__large_ignore = true;
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
|
|
if (__large_ignore)
|
|
_M_gcount = __gnu_cxx::__numeric_traits<streamsize>::__max;
|
|
|
|
if (traits_type::eq_int_type(__c, __eof))
|
|
__err |= ios_base::eofbit;
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
this->_M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ this->_M_setstate(ios_base::badbit); }
|
|
if (__err)
|
|
this->setstate(__err);
|
|
}
|
|
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)
|
|
{
|
|
ios_base::iostate __err = ios_base::goodbit;
|
|
__try
|
|
{
|
|
const int_type __eof = traits_type::eof();
|
|
__streambuf_type* __sb = this->rdbuf();
|
|
int_type __c = __sb->sgetc();
|
|
|
|
// See comment above.
|
|
bool __large_ignore = false;
|
|
while (true)
|
|
{
|
|
while (_M_gcount < __n
|
|
&& !traits_type::eq_int_type(__c, __eof)
|
|
&& !traits_type::eq_int_type(__c, __delim))
|
|
{
|
|
++_M_gcount;
|
|
__c = __sb->snextc();
|
|
}
|
|
if (__n == __gnu_cxx::__numeric_traits<streamsize>::__max
|
|
&& !traits_type::eq_int_type(__c, __eof)
|
|
&& !traits_type::eq_int_type(__c, __delim))
|
|
{
|
|
_M_gcount =
|
|
__gnu_cxx::__numeric_traits<streamsize>::__min;
|
|
__large_ignore = true;
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
|
|
if (__large_ignore)
|
|
_M_gcount = __gnu_cxx::__numeric_traits<streamsize>::__max;
|
|
|
|
if (traits_type::eq_int_type(__c, __eof))
|
|
__err |= ios_base::eofbit;
|
|
else if (traits_type::eq_int_type(__c, __delim))
|
|
{
|
|
if (_M_gcount
|
|
< __gnu_cxx::__numeric_traits<streamsize>::__max)
|
|
++_M_gcount;
|
|
__sb->sbumpc();
|
|
}
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
this->_M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ this->_M_setstate(ios_base::badbit); }
|
|
if (__err)
|
|
this->setstate(__err);
|
|
}
|
|
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)
|
|
{
|
|
ios_base::iostate __err = ios_base::goodbit;
|
|
__try
|
|
{
|
|
__c = this->rdbuf()->sgetc();
|
|
if (traits_type::eq_int_type(__c, traits_type::eof()))
|
|
__err |= ios_base::eofbit;
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
this->_M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ this->_M_setstate(ios_base::badbit); }
|
|
if (__err)
|
|
this->setstate(__err);
|
|
}
|
|
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)
|
|
{
|
|
ios_base::iostate __err = ios_base::goodbit;
|
|
__try
|
|
{
|
|
_M_gcount = this->rdbuf()->sgetn(__s, __n);
|
|
if (_M_gcount != __n)
|
|
__err |= (ios_base::eofbit | ios_base::failbit);
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
this->_M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ this->_M_setstate(ios_base::badbit); }
|
|
if (__err)
|
|
this->setstate(__err);
|
|
}
|
|
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)
|
|
{
|
|
ios_base::iostate __err = ios_base::goodbit;
|
|
__try
|
|
{
|
|
// Cannot compare int_type with streamsize generically.
|
|
const streamsize __num = this->rdbuf()->in_avail();
|
|
if (__num > 0)
|
|
_M_gcount = this->rdbuf()->sgetn(__s, std::min(__num, __n));
|
|
else if (__num == -1)
|
|
__err |= ios_base::eofbit;
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
this->_M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ this->_M_setstate(ios_base::badbit); }
|
|
if (__err)
|
|
this->setstate(__err);
|
|
}
|
|
return _M_gcount;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
putback(char_type __c)
|
|
{
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 60. What is a formatted input function?
|
|
_M_gcount = 0;
|
|
// Clear eofbit per N3168.
|
|
this->clear(this->rdstate() & ~ios_base::eofbit);
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
ios_base::iostate __err = ios_base::goodbit;
|
|
__try
|
|
{
|
|
const int_type __eof = traits_type::eof();
|
|
__streambuf_type* __sb = this->rdbuf();
|
|
if (!__sb
|
|
|| traits_type::eq_int_type(__sb->sputbackc(__c), __eof))
|
|
__err |= ios_base::badbit;
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
this->_M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ this->_M_setstate(ios_base::badbit); }
|
|
if (__err)
|
|
this->setstate(__err);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
unget(void)
|
|
{
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 60. What is a formatted input function?
|
|
_M_gcount = 0;
|
|
// Clear eofbit per N3168.
|
|
this->clear(this->rdstate() & ~ios_base::eofbit);
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
ios_base::iostate __err = ios_base::goodbit;
|
|
__try
|
|
{
|
|
const int_type __eof = traits_type::eof();
|
|
__streambuf_type* __sb = this->rdbuf();
|
|
if (!__sb
|
|
|| traits_type::eq_int_type(__sb->sungetc(), __eof))
|
|
__err |= ios_base::badbit;
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
this->_M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ this->_M_setstate(ios_base::badbit); }
|
|
if (__err)
|
|
this->setstate(__err);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
int
|
|
basic_istream<_CharT, _Traits>::
|
|
sync(void)
|
|
{
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// DR60. Do not change _M_gcount.
|
|
int __ret = -1;
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
ios_base::iostate __err = ios_base::goodbit;
|
|
__try
|
|
{
|
|
__streambuf_type* __sb = this->rdbuf();
|
|
if (__sb)
|
|
{
|
|
if (__sb->pubsync() == -1)
|
|
__err |= ios_base::badbit;
|
|
else
|
|
__ret = 0;
|
|
}
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
this->_M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ this->_M_setstate(ios_base::badbit); }
|
|
if (__err)
|
|
this->setstate(__err);
|
|
}
|
|
return __ret;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
typename basic_istream<_CharT, _Traits>::pos_type
|
|
basic_istream<_CharT, _Traits>::
|
|
tellg(void)
|
|
{
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// DR60. Do not change _M_gcount.
|
|
pos_type __ret = pos_type(-1);
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
__try
|
|
{
|
|
if (!this->fail())
|
|
__ret = this->rdbuf()->pubseekoff(0, ios_base::cur,
|
|
ios_base::in);
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
this->_M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ this->_M_setstate(ios_base::badbit); }
|
|
}
|
|
return __ret;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
seekg(pos_type __pos)
|
|
{
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// DR60. Do not change _M_gcount.
|
|
// Clear eofbit per N3168.
|
|
this->clear(this->rdstate() & ~ios_base::eofbit);
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
ios_base::iostate __err = ios_base::goodbit;
|
|
__try
|
|
{
|
|
if (!this->fail())
|
|
{
|
|
// 136. seekp, seekg setting wrong streams?
|
|
const pos_type __p = this->rdbuf()->pubseekpos(__pos,
|
|
ios_base::in);
|
|
|
|
// 129. Need error indication from seekp() and seekg()
|
|
if (__p == pos_type(off_type(-1)))
|
|
__err |= ios_base::failbit;
|
|
}
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
this->_M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ this->_M_setstate(ios_base::badbit); }
|
|
if (__err)
|
|
this->setstate(__err);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
basic_istream<_CharT, _Traits>&
|
|
basic_istream<_CharT, _Traits>::
|
|
seekg(off_type __off, ios_base::seekdir __dir)
|
|
{
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// DR60. Do not change _M_gcount.
|
|
// Clear eofbit per N3168.
|
|
this->clear(this->rdstate() & ~ios_base::eofbit);
|
|
sentry __cerb(*this, true);
|
|
if (__cerb)
|
|
{
|
|
ios_base::iostate __err = ios_base::goodbit;
|
|
__try
|
|
{
|
|
if (!this->fail())
|
|
{
|
|
// 136. seekp, seekg setting wrong streams?
|
|
const pos_type __p = this->rdbuf()->pubseekoff(__off, __dir,
|
|
ios_base::in);
|
|
|
|
// 129. Need error indication from seekp() and seekg()
|
|
if (__p == pos_type(off_type(-1)))
|
|
__err |= ios_base::failbit;
|
|
}
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
this->_M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ this->_M_setstate(ios_base::badbit); }
|
|
if (__err)
|
|
this->setstate(__err);
|
|
}
|
|
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;
|
|
typedef typename __istream_type::int_type __int_type;
|
|
|
|
typename __istream_type::sentry __cerb(__in, false);
|
|
if (__cerb)
|
|
{
|
|
ios_base::iostate __err = ios_base::goodbit;
|
|
__try
|
|
{
|
|
const __int_type __cb = __in.rdbuf()->sbumpc();
|
|
if (!_Traits::eq_int_type(__cb, _Traits::eof()))
|
|
__c = _Traits::to_char_type(__cb);
|
|
else
|
|
__err |= (ios_base::eofbit | ios_base::failbit);
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
__in._M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ __in._M_setstate(ios_base::badbit); }
|
|
if (__err)
|
|
__in.setstate(__err);
|
|
}
|
|
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 basic_streambuf<_CharT, _Traits> __streambuf_type;
|
|
typedef typename _Traits::int_type int_type;
|
|
typedef _CharT char_type;
|
|
typedef ctype<_CharT> __ctype_type;
|
|
|
|
streamsize __extracted = 0;
|
|
ios_base::iostate __err = ios_base::goodbit;
|
|
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 = __gnu_cxx::__numeric_traits<streamsize>::__max;
|
|
|
|
const __ctype_type& __ct = 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)
|
|
&& !__ct.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))
|
|
__err |= ios_base::eofbit;
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 68. Extractors for char* should store null at end
|
|
*__s = char_type();
|
|
__in.width(0);
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
__in._M_setstate(ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ __in._M_setstate(ios_base::badbit); }
|
|
}
|
|
if (!__extracted)
|
|
__err |= ios_base::failbit;
|
|
if (__err)
|
|
__in.setstate(__err);
|
|
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;
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typedef basic_streambuf<_CharT, _Traits> __streambuf_type;
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typedef typename __istream_type::int_type __int_type;
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typedef ctype<_CharT> __ctype_type;
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const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc());
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const __int_type __eof = _Traits::eof();
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__streambuf_type* __sb = __in.rdbuf();
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__int_type __c = __sb->sgetc();
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while (!_Traits::eq_int_type(__c, __eof)
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&& __ct.is(ctype_base::space, _Traits::to_char_type(__c)))
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__c = __sb->snextc();
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if (_Traits::eq_int_type(__c, __eof))
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__in.setstate(ios_base::eofbit);
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return __in;
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}
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// Inhibit implicit instantiations for required instantiations,
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// which are defined via explicit instantiations elsewhere.
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#if _GLIBCXX_EXTERN_TEMPLATE
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extern template class basic_istream<char>;
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extern template istream& ws(istream&);
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extern template istream& operator>>(istream&, char&);
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extern template istream& operator>>(istream&, char*);
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extern template istream& operator>>(istream&, unsigned char&);
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extern template istream& operator>>(istream&, signed char&);
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extern template istream& operator>>(istream&, unsigned char*);
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extern template istream& operator>>(istream&, signed char*);
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extern template istream& istream::_M_extract(unsigned short&);
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extern template istream& istream::_M_extract(unsigned int&);
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extern template istream& istream::_M_extract(long&);
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extern template istream& istream::_M_extract(unsigned long&);
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extern template istream& istream::_M_extract(bool&);
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#ifdef _GLIBCXX_USE_LONG_LONG
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extern template istream& istream::_M_extract(long long&);
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extern template istream& istream::_M_extract(unsigned long long&);
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#endif
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extern template istream& istream::_M_extract(float&);
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extern template istream& istream::_M_extract(double&);
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extern template istream& istream::_M_extract(long double&);
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extern template istream& istream::_M_extract(void*&);
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|
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extern template class basic_iostream<char>;
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|
|
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#ifdef _GLIBCXX_USE_WCHAR_T
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extern template class basic_istream<wchar_t>;
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extern template wistream& ws(wistream&);
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extern template wistream& operator>>(wistream&, wchar_t&);
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extern template wistream& operator>>(wistream&, wchar_t*);
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|
|
|
extern template wistream& wistream::_M_extract(unsigned short&);
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|
extern template wistream& wistream::_M_extract(unsigned int&);
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|
extern template wistream& wistream::_M_extract(long&);
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|
extern template wistream& wistream::_M_extract(unsigned long&);
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|
extern template wistream& wistream::_M_extract(bool&);
|
|
#ifdef _GLIBCXX_USE_LONG_LONG
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|
extern template wistream& wistream::_M_extract(long long&);
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|
extern template wistream& wistream::_M_extract(unsigned long long&);
|
|
#endif
|
|
extern template wistream& wistream::_M_extract(float&);
|
|
extern template wistream& wistream::_M_extract(double&);
|
|
extern template wistream& wistream::_M_extract(long double&);
|
|
extern template wistream& wistream::_M_extract(void*&);
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|
|
|
extern template class basic_iostream<wchar_t>;
|
|
#endif
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|
#endif
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_GLIBCXX_END_NAMESPACE_VERSION
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|
} // namespace std
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|
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|
#endif
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