Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!lll-winken!uunet!auspex!guy
From: guy@auspex.UUCP (Guy Harris)
Newsgroups: comp.unix.questions
Subject: Re: SysV bcopy?
Keywords: bcopy SysV BSD
Message-ID: <1189@auspex.UUCP>
Date: 21 Mar 89 20:15:24 GMT
References: <114@sherpa.UUCP>
Reply-To: guy@auspex.UUCP (Guy Harris)
Distribution: na
Organization: Auspex Systems, Santa Clara
Lines: 18

>Is there a routine in the system V library analogous to BSD's bcopy().

"memcpy".  The differences are:

	1) the first and second arguments are reversed:

		bcopy(from, to, count);

	    becomes

		memcpy(to, from, count);

	2) "memcpy" makes no guarantees that it'll work right if "from"
	   and "to" overlap; I don't have the 4.3-tahoe manual page
	   handy to see whether it guarantees that it'll work, but I
	   think most implementations do guarantee that, and some code
	   relies on it working.  (The SunOS "bcopy" manual page says
	   that "Overlapping strings are handled correctly.")