From owner-freebsd-chat  Tue Jan 18  7:52: 9 2000
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To: Jonathon McKitrick <jcm@dogma.freebsd-uk.eu.org>
Cc: freebsd-chat@freebsd.org, syssgm@detir.qld.gov.au
Subject: Re: For any sick-in-the-head C programmers 
References: <Pine.BSF.4.21.0001181534340.33173-100000@dogma.freebsd-uk.eu.org>
In-Reply-To: <Pine.BSF.4.21.0001181534340.33173-100000@dogma.freebsd-uk.eu.org>
    from Jonathon McKitrick at "Tue, 18 Jan 2000 15:34:48 +0000"
Date: Wed, 19 Jan 2000 01:50:22 +1000
From: Stephen McKay <syssgm@detir.qld.gov.au>
Sender: owner-freebsd-chat@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org

On Tuesday, 18th January 2000, Jonathon McKitrick wrote:

>Is there a way to format that macro so it is more readable?

I've not tried compiling it, but this should be equivalent.  By the way,
clear layout shows that the & vs == trick saved 2 characters in total. :-)

/*************** Micro getopt() *********************************************/
#define OPTION(c,v)					\
    (							\
    _O&2 && **v						\
	? *(*v)++					\
	: !c || _O&4					\
	    ? 0						\
	    :   (					\
		!(_O&1) && (--c, ++v),			\
		_O=4,					\
		c && **v == '-' && v[0][1]		\
		    ? *++*v == '-' && !v[0][1]		\
			? (--c, ++v , 0)		\
			: (_O=2, *(*v)++)		\
		    : 0					\
		)					\
    )

#define OPTARG(c,v)					\
    (							\
    _O&2						\
	? **v || (++v, --c)				\
	    ? (_O=1, --c, *v++)				\
	    : (_O=4, (char*)0)				\
	: (char*)0					\
    )

#define OPTONLYARG(c,v)					\
    (							\
    _O&2 && **v						\
	? (_O=1, --c, *v++)				\
	: (char*)0					\
    )

#define ARG(c,v)					\
    (							\
    c							\
	? (--c, *v++)					\
	: (char*)0					\
    )

static int _O = 0;              /* Internal state */
/*************** Micro getopt() *********************************************/


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