From: Thomas Demmer <demmer AT LSTM DOT Ruhr-UNI-Bochum DOT De>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Bug in gcc 2.7.2?
Date: Thu, 16 Apr 1998 23:20:00 +0200
Organization: Lehrstuhl fuer Stroemungsmechanik
Lines: 37
Message-ID: <35367600.83A29F93@LSTM.Ruhr-UNI-Bochum.De>
References: <35360BD4 DOT 5DB6C8C5 AT sis DOT co DOT at>
NNTP-Posting-Host: bvb.lstm.ruhr-uni-bochum.de
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
CC: "Gerhard W. Gruber" <g DOT gruber AT sis DOT co DOT at>
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Precedence: bulk

Gerhard W. Gruber wrote:
> 
> I just encountered a strange thing. I was using a loop that process a buffer.
> When the index is outside the buffersize the code should read the next block
> from the file and continue. To do this I'm using the modulo operator but there
> seems a bug with this.

It's late and I might be completely wrong, but what 
the heck you want to do?

I guess something like this:
char elem(unsigned index){
static unsigned long oldblock;
static int been_here = 0;
static char buff[BUFLEN];
long block;
  block = index/BUFLEN;
  if(!been_here || block != oldblock){
    been_here = 1;
    Read_Block( oldblock=block );
  }
  return buff[ index % BUFLEN];
}

Ciao
Tom

*************************************************************
* Thomas Demmer                                             *
* Lehrstuhl fuer Stroemungsmechanik                         *
* Ruhr-Uni-Bochum                                           *
* Universitaetsstr. 150                                     *
* D-44780  Bochum                                           *
* Tel: +49 234 700 6434                                     *
* Fax: +49 234 709 4162                                     *
* http://www.lstm.ruhr-uni-bochum.de/~demmer                *
*************************************************************