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Message-ID: <696BDC661BFCD411A8C90002A509489616DA3C@bndkcopmex01.barconet.com>
From: "Schultz, Jacob" <Jacob DOT Schultz AT barconet DOT com>
To: "'cygwin AT cygwin DOT com'" <cygwin AT cygwin DOT com>
Subject: File streams in C++
Date: Fri, 20 Apr 2001 09:58:45 +0200
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I've experianced strange problems with C++ streams when running under
Cygwin. I'm not sure whether this error relates to Cygwin or to GCC but
perhaps someone else can find out.
What happens is that the input file in not read to the end. The attached
program illustrates this (test data also included).

$ ./test
File ended after 311 bytes
File ended after 1001 bytes

The last resut if obviously the correct result.

Jacob Schultz

 <<test.cpp>>  <<test.txt>> 

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/*
 * There seems to be a problem with C++ instream.get(char)
 * This program tests it and tests the C alternative
 */

#include <fstream.h>=0A=
#include <stdio.h>=0A=


int
main (int argc, char **argv)
{
  ifstream stream;
  FILE *file;
  unsigned char ch;
  unsigned long long int n=3D0;

  stream.open ("test.txt");
  if( stream.rdstate() !=3D 0 )=0A=
  {
    cerr << "Couldn't open input file" << endl;=0A=
    exit (1);
  }

  while (!stream.eof())
  {
	stream.get (ch);
	n++;
  }=0A=
  stream.close ();
  cout << "file ended after " << n << " bytes" << endl;

  n=3D0;
  file =3D fopen ("test.txt","r");
  while (!feof(file))
  {
	ch =3D fgetc (file);
	n++;
  }=0A=
  fclose (file);
  cout << "file ended after " << n << " bytes" << endl;

  return 0;
}
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