From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Pavel Vasilyev <pavel@pavlinux.ru>
Cc: Ming Lei <tom.leiming@gmail.com>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Repalce strncmp by memcmp
Date: Sun, 28 Nov 2010 20:13:59 -0800 [thread overview]
Message-ID: <20101129041359.GA6991@core.coreip.homeip.net> (raw)
In-Reply-To: <4CF319D9.9060102@pavlinux.ru>
On Mon, Nov 29, 2010 at 06:11:21AM +0300, Pavel Vasilyev wrote:
> On 29.11.2010 05:29, Ming Lei wrote:
> > Hi,
> >
> > 2010/11/29 Pavel Vasilyev <pavel@pavlinux.ru>:
> >> This patch replace all strncmp(a, b, c) by memcmp(a, b, c).
> >>
> >> I test on x86_64 (AMD Opteron 285).
> > In fact, memcmp doesn't handle case of tail of string, so
> > it is not safe to replace strncmp with memcmp
> >
> #include <stdio.h>
> #include <errno.h>
>
> int main() {
>
> char *STR = "XXXX\0";
> char *XXX = "XXXX";
Try comparing:
"XXXX\0YYYY" and
"XXXX\0ZZZZ"
and observe the difference.
--
Dmitry
next prev parent reply other threads:[~2010-11-29 4:28 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-29 2:09 Pavel Vasilyev
2010-11-29 2:21 ` microcai
2010-11-29 2:29 ` Ming Lei
2010-11-29 3:11 ` Pavel Vasilyev
2010-11-29 4:13 ` Dmitry Torokhov [this message]
2010-11-29 5:26 ` YOSHIFUJI Hideaki
2010-11-29 12:41 ` Pavel Vasilyev
2010-11-29 3:10 ` Américo Wang
2010-11-29 10:18 ` Andi Kleen
2010-11-29 14:58 ` Steven Rostedt
2010-11-29 19:41 ` Pavel Vasilyev
2010-11-29 22:18 ` Steven Rostedt
2010-11-29 22:26 ` Steven Rostedt
2010-11-29 22:49 ` Pavel Vasilyev
2010-11-30 9:24 ` Américo Wang
2010-11-29 22:51 ` Ryan Mallon
2010-11-30 10:27 ` Bernd Petrovitsch
2010-11-29 23:32 ` Arnaud Lacombe
2010-11-30 10:34 ` Bernd Petrovitsch
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