istream.tcc

俄罗斯高人Mamaich的Pocket gcc编译器（运行在PocketPC上）的全部源代码。

	  try 
	    {
	      _M_check_facet(this->_M_fnumget);
	      const __numget_type& __ng = *this->_M_fnumget;
	      __ng.get(*this, 0, *this, __err, __n);
	    }
	  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>::
    operator>>(void*& __n)
    {
      sentry __cerb(*this, false);
      if (__cerb) 
	{
	  ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
	  try 
	    {
	      _M_check_facet(this->_M_fnumget);
	      const __numget_type& __ng = *this->_M_fnumget;
	      __ng.get(*this, 0, *this, __err, __n);
	    }
	  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>::
    operator>>(__streambuf_type* __sbout)
    {
      ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
      sentry __cerb(*this, false);
      if (__cerb && __sbout)
	{
	  try
	    {
	      if (!__copy_streambufs(*this, this->rdbuf(), __sbout))
		__err |= ios_base::failbit;
	    }
	  catch(...)
	    { this->_M_setstate(ios_base::failbit); }
	}
      else if (!__sbout)
	__err |= ios_base::failbit;
      if (__err)
	this->setstate(__err);
      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;
      ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
      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
		__err |= ios_base::eofbit;
	    }
	  catch(...)
	    { this->_M_setstate(ios_base::badbit); }
	}
      if (!_M_gcount)
	__err |= ios_base::failbit;
      if (__err)
	this->setstate(__err);
      return __c;
    }

  template<typename _CharT, typename _Traits>
    basic_istream<_CharT, _Traits>&
    basic_istream<_CharT, _Traits>::
    get(char_type& __c)
    {
      _M_gcount = 0;
      ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
      sentry __cerb(*this, true);
      if (__cerb) 
	{
 	  try 
	    {
	      int_type __cb = this->rdbuf()->sbumpc();
	      // 27.6.1.1 paragraph 3
	      if (!traits_type::eq_int_type(__cb, traits_type::eof()))
		{
		  _M_gcount = 1;
		  __c = traits_type::to_char_type(__cb);
		}
	      else
		__err |= ios_base::eofbit;
	    }
	  catch(...)
	    { this->_M_setstate(ios_base::badbit); }
	}
      if (!_M_gcount)
	__err |= ios_base::failbit;
      if (__err)
	this->setstate(__err);
      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;
      ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
      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))
		__err |= ios_base::eofbit;
	    }
	  catch(...)
	    { this->_M_setstate(ios_base::badbit); }
	}
      *__s = char_type();
      if (!_M_gcount)
	__err |= ios_base::failbit;
      if (__err)
	this->setstate(__err);
      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;
      ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
      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))
		__err |= ios_base::eofbit;
	    }
	  catch(...)
	    { this->_M_setstate(ios_base::badbit); }
	}
      if (!_M_gcount)
	__err |= ios_base::failbit;
      if (__err)
	this->setstate(__err);
      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;
      ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
      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))
		__err |= ios_base::eofbit;
	      else
		{
		  if (traits_type::eq_int_type(__c, __idelim))
		    {
		      __sb->sbumpc();
		      ++_M_gcount;
		    }
		  else
		    __err |= ios_base::failbit;
		}
	    }
	  catch(...)
	    { this->_M_setstate(ios_base::badbit); }
	}
      *__s = char_type();
      if (!_M_gcount)
	__err |= ios_base::failbit;
      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::iostate(ios_base::goodbit);
	  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))
		__err |= ios_base::eofbit;
	    }
	  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::iostate(ios_base::goodbit);
	  try 
	    {
	      __c = this->rdbuf()->sgetc();
	      if (traits_type::eq_int_type(__c, traits_type::eof()))
		__err |= ios_base::eofbit;
	    }
	  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::iostate(ios_base::goodbit);
	  try 
	    {
	      _M_gcount = this->rdbuf()->sgetn(__s, __n);
	      if (_M_gcount != __n)
		__err |= (ios_base::eofbit | ios_base::failbit);
	    }	    
	  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::iostate(ios_base::goodbit);
	  try 
	    {
	      // Cannot compare int_type with streamsize generically.
	      streamsize __num = this->rdbuf()->in_avail();
	      if (__num >= 0)
		{
		  __num = min(__num, __n);
		  if (__num)
		    _M_gcount = this->rdbuf()->sgetn(__s, __num);
		}
	      else
		__err |= ios_base::eofbit;
	    }
	  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)
    {
#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
// 60. What is a formatted input function?
      _M_gcount = 0;
#endif
      sentry __cerb(*this, true);
      if (__cerb) 
	{
	  ios_base::iostate __err = ios_base::iostate(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;
	    }