istream.tcc

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// Copyright (C) 1997-1999 Cygnus Solutions
//
// 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
//

#include <bits/std_locale.h>

namespace std {

  template<typename _CharT, typename _Traits>
    basic_istream<_CharT, _Traits>::sentry::
    sentry(basic_istream<_CharT, _Traits>& __in, bool __noskipws)
    {
      if (__in.good() && !__noskipws && (__in.flags() & ios_base::skipws))
	{
	  const __int_type __eof = traits_type::eof();
	  __int_type __c = __int_type(0);
	  __streambuf_type* __sb = __in.rdbuf();
	  const __ctype_type* __ctype = __in._M_get_fctype_ios();
	  bool __testsp = true;
	  bool __testeof = false;

	  while (!__testeof && __testsp)
	    {
	      __c = __sb->sbumpc();
	      __testeof = __c == __eof;
	      __testsp = __ctype->is(ctype_base::space, __c);
	    }
	  
	  if (!__testeof && !__testsp)
	    __sb->sputbackc(__c);
#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
//195.  Should basic_istream::sentry's constructor ever set eofbit? 
	  else
	    __in.setstate(ios_base::failbit | ios_base::eofbit);
#endif
	}
      _M_ok = __in.good();
    }

  template<typename _CharT, typename _Traits>
    basic_istream<_CharT, _Traits>& 
    basic_istream<_CharT, _Traits>::
    operator>>(__istream_type& (*__pf)(__istream_type&))
    {
      sentry __cerb(*this, false);
      if (__cerb) 
	{
	  try {
	    __pf(*this);
	  }
	  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;
	  }
	}
      return *this;
    }

  template<typename _CharT, typename _Traits>
    basic_istream<_CharT, _Traits>& 
    basic_istream<_CharT, _Traits>::
    operator>>(__ios_type& (*__pf)(__ios_type&))
    {
      sentry __cerb(*this, false);
      if (__cerb) 
	{
	  try {
	    __pf(*this);
	  }
	  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;
	  }
	}
      return *this;
    }
  
  template<typename _CharT, typename _Traits>
    basic_istream<_CharT, _Traits>& 
    basic_istream<_CharT, _Traits>::
    operator>>(ios_base& (*__pf)(ios_base&))
    {
      sentry __cerb(*this, false);
      if (__cerb) 
	{
	  try {
	    __pf(*this);
	  }
	  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;
	  }
	}
      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 {
	    iostate __err = iostate(0);
	    _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;
	  }
	}
      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 {
	    iostate __err = iostate(0);
	    _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;
	  }
	}
      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 {
	    iostate __err = iostate(0);
	    _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;
	  }
	}
      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 {
	    iostate __err = iostate(0);
	    _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;
	  }
	}
      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 {
	    iostate __err = iostate(0);
	    _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;
	  }
	}
      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 {
	    iostate __err = iostate(0);
	    _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;
	  }
	}
      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 {
	    iostate __err = iostate(0);
	    _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;
	  }
	}
      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 {
	    iostate __err = iostate(0);
	    _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;
	  }
	}
      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 {
	    iostate __err = iostate(0);
	    _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;
	  }
	}
      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 {
	    iostate __err = iostate(0);
	    _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;
	  }
	}
      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 {
	    iostate __err = iostate(0);
	    _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;
	  }
	}
      return *this;
    }

  template<typename _CharT, typename _Traits>
    basic_istream<_CharT, _Traits>& 
    basic_istream<_CharT, _Traits>::operator>>(long double& __n)