Path: utzoo!mnetor!uunet!husc6!mit-eddie!ll-xn!adelie!munsell!pac
From: pac@munsell.UUCP (Paul Czarnecki)
Newsgroups: comp.unix.questions
Subject: Re: Wierd Compilers
Message-ID: <1440@pinney.munsell.UUCP>
Date: 21 Dec 87 19:08:07 GMT
References: <10861@brl-adm.ARPA>
Reply-To: pac@pinney.UUCP (Paul Czarnecki)
Organization: Eikonix Corp., Bedford, MA
Lines: 34

In article <10861@brl-adm.ARPA> rbj@icst-cmr.arpa (Root Boy Jim) writes:
>I always thought that the `do ... while();' syntax was a gratuitous

I had also thought that way.  But after 5 years of C I finally wrote
my first do{}while loop.  (I had to look it up!)

For one of my libraries, I treat a "picture" as a collection of
images.  They are held in a doubly linked list in the "picture"
structure.  If I want to "process" each of the images in a picture I
use this code:

        image_list_2 = image_list_1 = pic->image_list;

        /*
         * process each of the subimages 
         */

        do {
                retcode = process_image(image_list_2->image);
                if (retcode <= 0) {
                        return (EPROCESSFAILED);
                }

                image_list_2 = image_list_2->next;	/* next images */
        } while (image_list_1 != image_list_2);


There *are* some applications that a do{}while are natural for.  There
just aren't many of them.

					pZ
-- 
		       Paul Czarnecki -- Spam, spam, spam, Usenet, and spam
	{{harvard,ll-xn}!adelie,{decvax,allegra,talcott}!encore}!munsell!pz