Path: utzoo!attcan!uunet!samsung!gem.mps.ohio-state.edu!usc!bbn!diamond.bbn.com!mlandau
From: mlandau@bbn.com (Matt Landau)
Newsgroups: comp.lang.c
Subject: Re: binary constants (??)
Keywords: macro, constant, binary
Message-ID: <13261@granite.BBN.COM>
Date: 21 Nov 89 16:03:15 GMT
References: <305@frf.omron.co.jp> <602@chem.ucsd.EDU> <7065@ficc.uu.net> <2765@munnari.oz.au>
Sender: news@bbn.com
Lines: 49

On the subject of binary constants for creating cursor or image data,
here's a reposting of one of the more clever things I've seen come 
across comp.lang.c.  It's trivial to adapt this to use a syntax more
suited to traditional sets of flags, etc.

--
 Matt Landau			Oblivion gallops closer,
 mlandau@bbn.com		    favoring the spur, sparing the rein.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Article 5640 of comp.lang.c:
>From: ado@elsie.UUCP (Arthur David Olson)
Newsgroups: comp.lang.c,comp.lang.c++
Subject: Re: Binary integer literals
Date: 12 Dec 87 01:15:32 GMT

#include <stdio.h>

#define __	((((((((((((((((0
#define _	<<1|0)
#define X	<<1|1)

static unsigned short CursorPattern[16] = { 
	__	X X X X X X X X _ _ _ _ _ _ _ _ 	,
	__	X _ _ _ _ _ X _ _ _ _ _ _ _ _ _ 	,
	__	X _ _ _ _ X _ _ _ _ _ _ _ _ _ _ 	,
	__	X _ _ _ _ _ X _ _ _ _ _ _ _ _ _ 	,
	__	X _ _ _ _ _ _ X _ _ _ _ _ _ _ _ 	,
	__	X _ X _ _ _ _ _ X _ _ _ _ _ _ _ 	,
	__	X X _ X _ _ _ _ _ X _ _ _ _ _ _ 	,
	__	X _ _ _ X _ _ _ X _ _ _ _ _ _ _ 	,
	__	_ _ _ _ _ X _ X _ _ _ _ _ _ _ _ 	,
	__	_ _ _ _ _ _ X _ _ _ _ _ _ _ _ _ 	,
	__	_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 	,
	__	_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 	,
	__	_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 	,
	__	_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 	,
	__	_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 	,
	__	_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
};

main()
{
	int	i;

	for (i = 0; i < sizeof CursorPattern / sizeof CursorPattern[0]; ++i)
		(void) printf("%04x\n", CursorPattern[i]);
	return 0;
}