Lines: 51
X-Admin: news AT aol DOT com
From: mmarkhinchcliffe AT aol DOT com (MMarkHinchcliffe)
Newsgroups: comp.os.msdos.djgpp
Date: 27 Aug 2003 09:23:31 GMT
Organization: AOL, http://www.aol.co.uk
Subject: setf problem
Message-ID: <20030827052331.16681.00000001@mb-m02.aol.com>
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

I'd be very grateful for some help with the following problem
In the code below the line
		os.setf( oldflags, ios::basefield);
causes a compilation error:
invalid conversion from 'long int' to 'std::_Ios_Fmtflags'
initializing argument 1 of 'std::_Ios_Fmtflags'
std::ios_base::setf(std::_Ios_Fmtflags, std::_Ios_Fmtflags)'

I've tried changing oldflags to long, unsigned long, int, unsigned int
without success.
In Microsoft Visual C++ 6.0 the Ios.h declares:
    inline long setf(long _f,long _m);
    inline long setf(long _l);
Presumably in djgpp setf similarly returns & takes parameters of type 'long'
I can't understand why the compiler objects to this.

	Mark Hinchcliffe

/*
 * friend output operator
 * Parameters:
 *   os   - output stream to write to
 *   bigi - Big_int to print value of
 * Return value:
 *   reference to os
 */
ostream & operator << ( ostream &os,
                        const Big_int & bigi )
{
  long oldflags = os.setf( ios::hex, ios::basefield);

  char old_fill = os.fill('0');
  bool leading_zero = true;

  for( int i = bigi.size_ - 1; i >= 0; i-- ) {
    if ( ! leading_zero )
      os.width(8);
    if ( bigi.number_[i] != 0)
      leading_zero = false;
    else if (i != 0 && leading_zero)
      continue;
    os << bigi.number_[i];
  }

  os.fill(old_fill);
  os.setf( oldflags, ios::basefield);

  return os;
}