Newsgroups: comp.lang.c
Path: utzoo!utgpu!jarvis.csri.toronto.edu!hub.toronto.edu!thomson
From: thomson@hub.toronto.edu (Brian Thomson)
Subject: Re: copying routines, order, and overlap
Message-ID: <8803240119.AA21810@hub.toronto.edu>
Organization: CSRI University of Toronto
References: <7712@apple.Apple.Com> <7485@brl-smoke.ARPA> <10731@mimsy.UUCP> <1304@ut-emx.UUCP> <10762@mimsy.UUCP>
Date: Wed, 23 Mar 88 20:19:04 EST

In article <10762@mimsy.UUCP> chris@mimsy.UUCP (Chris Torek) writes:
>
>In 4.2BSD, bcopy was allowed to do the copy in any order.  A chain of
>events (which I think I started) resulted in the 4.3BSD bcopy being
>constrained to check for overlap.

I did a bit of 4.2 porting several (4) years ago, and I distinctly
remember bcopy() checking for overlap and getting it right.
I began with VAX "bcopy.s 4.4 9/25/83".  Is this not original 4.2 code?
-- 
		    Brian Thomson,	    CSRI Univ. of Toronto
		    utcsri!uthub!thomson, thomson@hub.toronto.edu