copying routines, order, and overlap

[Brian Thomson]

In article <10762 at mimsy.UUCP> chris at 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 at hub.toronto.edu