Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!husc6!mit-eddie!ll-xn!ames!sdcsvax!ucbvax!utzoo.UUCP!henry
From: henry@utzoo.UUCP
Newsgroups: comp.protocols.tcp-ip
Subject: Re: TCP checksum unrolling
Message-ID: <8710210522.AA25366@ucbvax.Berkeley.EDU>
Date: Wed, 21-Oct-87 00:31:43 EDT
Article-I.D.: ucbvax.8710210522.AA25366
Posted: Wed Oct 21 00:31:43 1987
Date-Received: Fri, 23-Oct-87 01:59:03 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 10

> ... Some C compilers won't accept the wierd syntax below; or maybe I
> should point out, as you wretch on the floor, that there is at least ONE
> c compiler that DOES accept this syntax.

This particular piece of ugliness (switch labels inside a loop, for loop
unrolling) is known as Duff's Device, and is legitimate C that any correct
C compiler is supposed to accept.

				Henry Spencer @ U of Toronto Zoology
				{allegra,ihnp4,decvax,pyramid}!utzoo!henry