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From: garys@bunker.UUCP (Gary M. Samuelson)
Newsgroups: net.lang.c
Subject: Re: Tricky way to unroll string copy loops
Message-ID: <796@bunker.UUCP>
Date: Tue, 9-Apr-85 14:06:54 EST
Article-I.D.: bunker.796
Posted: Tue Apr  9 14:06:54 1985
Date-Received: Thu, 11-Apr-85 01:43:08 EST
References: <799@u1100a.UUCP> <582@lsuc.UUCP>
Organization: Bunker Ramo, Trumbull Ct
Lines: 28

I would like to suggest one aesthetic improvement to
Duff's Device.  It would look slightly less revolting
(in my opinion) if all of the case labels were at the
same block level:

Original:
> 			case 0: do {	*to++ = *from++;
> 			case 7:		*to++ = *from++;
>			...
> 			case 1:		*to++ = *from++;
> 				} while (--n > 0);

With my proposed change:
> 				do {
> 			case 0: 	*to++ = *from++;
> 			case 7:		*to++ = *from++;
>			...
> 			case 1:		*to++ = *from++;
> 				} while (--n > 0);

As I said, it's an aesthetic change, but then again, there
might be a case where some compiler does something with
either the 'do' or the brace which makes a difference.

I'm not sure I would use it either way.

Gary Samuelson
ittvax!bunker!garys