DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
  s=s1024; d=yahoo.co.in;
  h=X-YMail-OSG:Received:Date:From:Subject:To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID;
  b=I0MPyVZ5FRW8jtQ2wCsDD/UNY5wnGwBh6D/LqIAfACTkS7bEWhBPYa82WFpzkp1Dw5zy656HA+63bmHvku5sKUieRLYvFj1RkRrFOLGgkYLYICLByQCuwKOmMWGnlKOhtZQH+1gErJ7bIDKPl9nfeo6A6xmU6zrLunKJNB8cLvc=;
Date: Mon, 13 Aug 2007 11:55:40 +0100 (BST)
From: sk malik <srikrishanmalik@yahoo.co.in>
Subject: why use memcpy when memmove is there?
To: linux-kernel@vger.kernel.org
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7BIT
Message-ID: <977159.24669.qm@web7606.mail.in.yahoo.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 853
Lines: 30

Hi, All

We were looking at  "[kernel]/lib/string.c"
(http://lxr.linux.no/source/lib/string.c#L500)

memcpy copies a part of memory to some other location
but It will not work for all cases of overlapping
blocks.(if the start of destination block falls
between the source block)

while memove copes with overlapping areas.

then why is memcpy present in the sources can't we
simply do

"#define memcpy memmove" in include/linux/string.h

or am I missing something?

Regards
Sri


      Unlimited freedom, unlimited storage. Get it now, on http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/