From: "Johan Venter" <jventer AT writeme DOT com>
Newsgroups: comp.os.msdos.djgpp
References: <KoXyN35vg1q8HZF3EIU5c3sceTlu AT 4ax DOT com>
Subject: Re: What is MID() macro ?
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Date: Thu, 30 Sep 1999 11:36:33 +1000
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To: djgpp AT delorie DOT com
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Kevin <krugman AT nospam DOT demon DOT co DOT uk> wrote in message
news:KoXyN35vg1q8HZF3EIU5c3sceTlu AT 4ax DOT com...
> Hi all
>
> In the Allegro ex22.c program, a macro called MID is used thus
>
> col = MID(128, 255 - fixtoi(v1->z + v2->z) / 16, 255);
>
> I've not seen MID() before, what is it and where is it
> declared/defined ?.

From allegro.h:

#define MIN(x,y)     (((x) < (y)) ? (x) : (y))
#define MAX(x,y)     (((x) > (y)) ? (x) : (y))
#define MID(x,y,z)   MAX((x), MIN((y), (z)))

From my understanding of that, it finds the middle number of the three passed to
it.

--
Johan Venter
ICQ 3643877 - jventer AT writeme DOT com
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