Date: Tue, 5 Oct 1999 09:58:26 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: hank_heng AT hotmail DOT com
cc: djgpp AT delorie DOT com
Subject: Re: gettex() and puttext() problem.
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On Tue, 5 Oct 1999 hank_heng AT hotmail DOT com wrote:

> I try to debug it with "symify", it point back to the end of file is
> causing error, this does not make any sense at all...

It *will* make sense if you read section 12.2 of the DJGPP FAQ list,
which specifically mentions the case where the traceback points to the
closing brace of a function, or to its return statement.  The reason
for this is that you write over the return address on the stack by
overwriting some local variable.

> main()
> {
>   int test=3;
>   char destination;
>   void *des = &destination;
> 
> 
>   /* capture screen character */
>   test = gettext(10, 10, 20, 20, des);

And here's the villain: `destination' is declared `char', so only
a single-byte storage is allocated for it.  But `gettext' needs that
its last argument point to a buffer large enough to hold all the
characters retrieved from the screen portion specified by the other
arguments.  In your case, you need 10*10*2 = 200 bytes.

The following should make this work (warning: untested!):

    void *des = malloc (200);