Message-Id: <199604120528.BAA22345@mail-e2b-service.gnn.com>
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Date: Fri, 12 Apr 1996 01:34:11
From: Jethro Wright <Jetman AT gnn DOT com>
To: djgpp AT delorie DOT com
Subject: Re: A Proper Cast for a Funtio

[snip]

>Is there any reason why you can't do something similar with your
>function, either having a 'shell' function convert each of the 
>arguments and return values to the proper type, or having your 
>function do this itself?  All qsort() wants is a negative or zero 
>number if the elements don't get swapped, and a positive number if 
>they do.  Much easier than trying to do a typecast on the function 
>itself.

	John:  Actually, the easier solution is the cast.  The proj
I'm working on is a legacy app (mentioned in my orig post) and the old 
fn is similar to qsort() in that it specs that one of its formal args 
is a ptr to a fn.  But rather than code a three/four line wrapper every
time I needed to use a different fn type (w/ an unsigned arg instead 
of an int) I wanted to use a cast that would be shorter to write.  Of 
course, responding to the e-mail traffic from my question has negated that 
savings. :-)  You're right, though, and I *did* think about usg a 
wrapper at first, then decided this was a moment to pose a question 
to the folks on the 'net and learn an obscure bit of C notation that's 
eluded me in the past.

	This exercise has been educational beyond discovering how to 
code that simple little cast....   Jet



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