From:	Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Some minor questions...
Organization:	Pin Eight Software http://pineight.8m.com/
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NNTP-Posting-Date:	Mon, 11 Sep 2000 14:48:06 GMT
Distribution:	world
Date:	Mon, 11 Sep 2000 14:48:07 GMT
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

On Mon, 11 Sep 2000 07:57:17 GMT, AndrewJ
<luminous-is AT REMOVE DOT home DOT com> wrote:

>On Mon, 11 Sep 2000 05:53:30 GMT, "JS" <jmszczap82 AT adelphia DOT net> wrote:
>
>>Secondly, when setting up a program, is it ever necessary to check the
>>allegro_init, install_timer, and install_keyboard functions to see if they
>>initialised properly?
>
>You should check the return values of all functions (within reason), regardless
>of whether they are libc functions or external library functions.

allegro_init() will exit() to the caller if it can't initialize the
system.  install_timer() and install_keyboard() are also guaranteed
to work on all DOS, POSIX, and Win32 platforms (which is what Allegro
runs under).

But set_gfx_mode() and the load_*() are a different matter entirely
(the VESA driver may not be available, the user may not be running
with enough permissions *cough*NT*cough*, 404, etc).  Anything that
says in the docs that it _can_ fail should be checked.

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