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Re: amaya 2.4 - troubles on Alpha

From: <Irene.Vatton@inrialpes.fr>
Date: Mon, 03 Jan 2000 18:06:56 +0100
Message-Id: <200001031706.SAA09690@tahiti.inrialpes.fr>
To: Michal Jaegermann <michal@ellpspace.math.ualberta.ca>
cc: www-amaya@w3.org

Hi,

You're right, I'm going to clean up these errors.

In-reply-to: Your message of Tue, 28 Dec 1999 00:39:20 -0500."
             <199912280539.WAA22854@ellpspace.math.ualberta.ca> 
> I took a closer look at amaya-2.4.  Various issues which I mentioned
> in the past are still in the current sources - so I will not repeat
> myself.  Still the biggest gotcha is that all '...handler.c' sources
> from thotlib/image are basically broken as they all include a code
> in this style:
> 
> void PngPrint (...., int fd, ....)
> {
> ....
>       fprintf((FILE *)fd,....
> ....
> }
> 
> Surprise!  C does not guarantee that pointer will fit into int and
> indeed - this happens to be the case on my Alpha, for example - so if
> (FILE *) was passed to a function in 'int' we just lost a significant
> chunk of it.  May work accidentally somewhere but it does not make the
> code correct.  As a result (not necesarily of the particular piece of
> a code above) if I try to look at some 'screenshot' in a graphic
> format I am getting a blank screen and maybe a message like this one "
> *** Thot: Irrecoverable error ***[1]+ Done(1)".
> 
> >From "not seen before" department I notice quite a few instances
> of something like " ...if (c == _TABULATION_) ... " where 'c'
> is 'char', or maybe 'int'.  The trouble is that from headers
> follows that _TABULATION_ is a pointer to a string so a comparison
> is not likely to evaluate to "true".
> 
> Other than that things seem to work (if one discounts occasional
> complaints about "unaligned access" or crashes).
> 
>   Regards,
>   Michal
>   michal@harddata.com
> 
> 
> 
> 

  Irene.
Received on Monday, 3 January 2000 12:07:09 UTC

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