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- // istream classes -*- C++ -*-
-
- // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
- // Free Software Foundation, Inc.
- //
- // This file is part of the GNU ISO C++ Library. This library is free
- // software; you can redistribute it and/or modify it under the
- // terms of the GNU General Public License as published by the
- // Free Software Foundation; either version 2, or (at your option)
- // any later version.
-
- // This library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
-
- // You should have received a copy of the GNU General Public License along
- // with this library; see the file COPYING. If not, write to the Free
- // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- // USA.
-
- // As a special exception, you may use this file as part of a free software
- // library without restriction. Specifically, if other files instantiate
- // templates or use macros or inline functions from this file, or you compile
- // this file and link it with other files to produce an executable, this
- // file does not by itself cause the resulting executable to be covered by
- // the GNU General Public License. This exception does not however
- // invalidate any other reasons why the executable file might be covered by
- // the GNU General Public License.
-
- //
- // ISO C++ 14882: 27.6.2 Output streams
- //
-
- #pragma GCC system_header
-
- #include <locale>
- #include <ostream> // For flush()
-
- namespace std
- {
- template<typename _CharT, typename _Traits>
- basic_istream<_CharT, _Traits>::sentry::
- sentry(basic_istream<_CharT, _Traits>& __in, bool __noskipws)
- {
- if (__in.good())
- {
- if (__in.tie())
- __in.tie()->flush();
- if (!__noskipws && (__in.flags() & ios_base::skipws))
- {
- const __int_type __eof = traits_type::eof();
- __streambuf_type* __sb = __in.rdbuf();
- __int_type __c = __sb->sgetc();
-
- if (__in._M_check_facet(__in._M_fctype))
- while (!traits_type::eq_int_type(__c, __eof)
- && __in._M_fctype->is(ctype_base::space,
- traits_type::to_char_type(__c)))
- __c = __sb->snextc();
-
- #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
- //195. Should basic_istream::sentry's constructor ever set eofbit?
- if (traits_type::eq_int_type(__c, __eof))
- __in.setstate(ios_base::eofbit);
- #endif
- }
- }
-
- if (__in.good())
- _M_ok = true;
- else
- {
- _M_ok = false;
- __in.setstate(ios_base::failbit);
- }
- }
-
- template<typename _CharT, typename _Traits>
- basic_istream<_CharT, _Traits>&
- basic_istream<_CharT, _Traits>::
- operator>>(__istream_type& (*__pf)(__istream_type&))
- {
- __pf(*this);
- return *this;
- }
-
- template<typename _CharT, typename _Traits>
- basic_istream<_CharT, _Traits>&
- basic_istream<_CharT, _Traits>::
- operator>>(__ios_type& (*__pf)(__ios_type&))
- {
- __pf(*this);
- return *this;
- }
-
- template<typename _CharT, typename _Traits>
- basic_istream<_CharT, _Traits>&
- basic_istream<_CharT, _Traits>::
- operator>>(ios_base& (*__pf)(ios_base&))
- {
- __pf(*this);
- return *this;
- }
-
- template<typename _CharT, typename _Traits>
- basic_istream<_CharT, _Traits>&
- basic_istream<_CharT, _Traits>::
- operator>>(bool& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __n);
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->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>::
- operator>>(short& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- long __l;
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __l);
- #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
- // 118. basic_istream uses nonexistent num_get member functions.
- if (!(__err & ios_base::failbit)
- && (numeric_limits<short>::min() <= __l
- && __l <= numeric_limits<short>::max()))
- __n = __l;
- else
- __err |= ios_base::failbit;
- #endif
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->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>::
- operator>>(unsigned short& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __n);
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->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>::
- operator>>(int& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- long __l;
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __l);
- #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
- // 118. basic_istream uses nonexistent num_get member functions.
- if (!(__err & ios_base::failbit)
- && (numeric_limits<int>::min() <= __l
- && __l <= numeric_limits<int>::max()))
- __n = __l;
- else
- __err |= ios_base::failbit;
- #endif
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->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>::
- operator>>(unsigned int& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __n);
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->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>::
- operator>>(long& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __n);
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->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>::
- operator>>(unsigned long& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __n);
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->setstate(ios_base::badbit);
- if ((this->exceptions() & ios_base::badbit) != 0)
- __throw_exception_again;
- }
- }
- return *this;
- }
-
- #ifdef _GLIBCPP_USE_LONG_LONG
- template<typename _CharT, typename _Traits>
- basic_istream<_CharT, _Traits>&
- basic_istream<_CharT, _Traits>::
- operator>>(long long& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __n);
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->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>::
- operator>>(unsigned long long& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __n);
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->setstate(ios_base::badbit);
- if ((this->exceptions() & ios_base::badbit) != 0)
- __throw_exception_again;
- }
- }
- return *this;
- }
- #endif
-
- template<typename _CharT, typename _Traits>
- basic_istream<_CharT, _Traits>&
- basic_istream<_CharT, _Traits>::
- operator>>(float& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __n);
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->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>::
- operator>>(double& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __n);
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->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>::
- operator>>(long double& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __n);
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->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>::
- operator>>(void*& __n)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
- if (_M_check_facet(_M_fnumget))
- _M_fnumget->get(*this, 0, *this, __err, __n);
- this->setstate(__err);
- }
- catch(exception& __fail)
- {
- // 27.6.1.2.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->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>::
- operator>>(__streambuf_type* __sbout)
- {
- sentry __cerb(*this, false);
- if (__cerb)
- {
- try
- {
- streamsize __xtrct = 0;
- if (__sbout)
- {
- __streambuf_type* __sbin = this->rdbuf();
- __xtrct = __copy_streambufs(*this, __sbin, __sbout);
- }
- if (!__sbout || !__xtrct)
- this->setstate(ios_base::failbit);
- }
- catch(exception& __fail)
- {
- // 27.6.2.5.1 Common requirements.
- // Turn this on without causing an ios::failure to be thrown.
- this->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->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->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->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->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->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)
- {
- try
- {
- const int_type __eof = traits_type::eof();
- __streambuf_type* __sb = this->rdbuf();
- int_type __c;
-
- __n = 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->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->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->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
- {
- streamsize __num = this->rdbuf()->in_avail();
- if (__num > 0)
- {
- __num = 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->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)
- {
- 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->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->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->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);
- _M_gcount = 0;
- sentry __cerb(*this, true);
- if (__cerb)
- {
- try
- {
- __ret = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::in);
- }
- catch(exception& __fail)
- {
- // 27.6.1.3 paragraph 1
- // Turn this on without causing an ios::failure to be thrown.
- this->setstate(ios_base::badbit);
- if ((this->exceptions() & ios_base::badbit) != 0)
- __throw_exception_again;
- }
- }
- return __ret;
- }
-
-
- template<typename _CharT, typename _Traits>
- basic_istream<_CharT, _Traits>&
- basic_istream<_CharT, _Traits>::
- seekg(pos_type __pos)
- {
- _M_gcount = 0;
- sentry __cerb(*this, true);
- if (__cerb)
- {
- try
- {
- #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
- }
- catch(exception& __fail)
- {
- // 27.6.1.3 paragraph 1
- // Turn this on without causing an ios::failure to be thrown.
- this->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>::
- seekg(off_type __off, ios_base::seekdir __dir)
- {
- _M_gcount = 0;
- sentry __cerb(*this, true);
- if (__cerb)
- {
- try
- {
- #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
- }
- catch(exception& __fail)
- {
- // 27.6.1.3 paragraph 1
- // Turn this on without causing an ios::failure to be thrown.
- this->setstate(ios_base::badbit);
- if ((this->exceptions() & ios_base::badbit) != 0)
- __throw_exception_again;
- }
- }
- 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.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
- && __c != __eof && !__ctype.is(ctype_base::space, __c))
- {
- *__s++ = __c;
- ++__extracted;
- __c = __sb->snextc();
- }
- if (__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.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 (__c != __eof && __ctype.is(ctype_base::space, __c))
- __c = __sb->snextc();
- if (__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
- && __c != __eof && !__ctype.is(ctype_base::space, __c))
- {
- __str += _Traits::to_char_type(__c);
- ++__extracted;
- __c = __sb->snextc();
- }
- if (__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.
- 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
- } // namespace std
-