Message-ID:	<38B4508A.754E1FFB@geocities.com>
From:	Sahab Yazdani <beyonder69 AT geocities DOT com>
Organization:	PheonixSoft Inc.
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Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: something wierd is going on...
References:	<38B3192A DOT F17E3572 AT geocities DOT com> <8909up$mbp$1 AT nets3 DOT rz DOT RWTH-Aachen DOT DE>
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Date:	Wed, 23 Feb 2000 16:26:34 -0500
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

the second problem is that since DrawString is a part of a class,
showing you the source code would prove to be quite difficult (as people
in the group might get mad).  <string> is filled with valid values using
sprintf. 

My own system is Windows 98 (not SE) and I've tried it on Pure DOS
(CSWDMPI), Windows 95, Windows 95 OSR 2, a couple other Windows 98 and a
Windows 98 SE.  and only my own system works fine...

If it would help, the crash is a page fault and its a write error.  I
have tried symifying, but its really hard to tell what works and what
doesn't when you can't check it on your own computer. 

thanks for your help people...
  
Hans-Bernhard Broeker wrote:
> 
> Sahab Yazdani <beyonder69 AT geocities DOT com> wrote:
> [...]
> > writer->DrawString( x,y, "string", colour );
> 
> > it crashes on other computers (but not my own), yet when I use it like
> > this:
> 
> > char *string;
> 
>   /* I hope you filled 'string' with some useful value, between these,
>    * right? */
> 
> > writer->DrawString( x,y, string, colour );
> 
> > it works fine...  now can anybody tell me whats going on??
> 
> It's a bit hard to tell, as you didn't show us your 'DrawString'
> routine in source code. But here is a guess: you may be writing to the
> string passed in, inside DrawString. But string constants like the
> "string" in the above example are not writable, so you should get a
> segmentation fault, from this. Why you do not get this erorr, on your
> own machine, I do not know. Did you check out for possible differences
> between your machine, and those it crashes on (operating system, DOS
> box or true DOS mode?, if raw DOS, what's the DPMI server?)?
> 
> At full warning level, I think gcc would have warned you about
> dismissing a 'const' qualifier when you pass "string" to your routine.
> 

-- 
***********************************************************
* Sahab Yazdani * "We are all who we are, no more and no  *
* Thornhill S.S * less" - al'Lan Mandragoran              *
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* http://pheonixware.8m.com/                              *
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