From: Sergei Organov <osv@javad.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "J.A. MagallÃÃón" <jamagallon@ono.com>,
"Jan Engelhardt" <jengelh@linux01.gwdg.de>,
"Jeff Garzik" <jeff@garzik.org>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
"Andrew Morton" <akpm@linux-foundation.org>
Subject: Re: somebody dropped a (warning) bomb
Date: Tue, 13 Feb 2007 22:59:29 +0300 [thread overview]
Message-ID: <87odnxn80u.fsf@javad.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0702131121590.3604@woody.linux-foundation.org> (Linus Torvalds's message of "Tue, 13 Feb 2007 11:25:05 -0800 (PST)")
Linus Torvalds <torvalds@linux-foundation.org> writes:
> On Tue, 13 Feb 2007, Sergei Organov wrote:
>> >
>> > "I want a char of indeterminate sign"!
>>
>> I'm afraid I don't follow. Do we have a way to say "I want an int of
>> indeterminate sign" in C? The same way there doesn't seem to be a way
>> to say "I want a char of indeterminate sign".
>
> You're wrong.
Sure, I knew it from the very beginning ;)
>
> Exactly because "char" *by*definition* is "indeterminate sign" as far as
> something like "strlen()" is concerned.
Thanks, I now understand that you either don't see the difference
between "indeterminate" and "implementation-defined" in this context or
consider it non-essential, so I think I've got your point.
> "char" is _special_. Char is _different_. Char is *not* "int".
Sure.
>
>> So no, strlen() doesn't actually say that, no matter if we like it or
>> not. It actually says "I want a char with implementation-defined sign".
>
> You're arguing some strange semantic difference in the English
> language.
Didn't I further explain what I meant exactly (that you've skipped)?
OK, never mind.
> I'm not really interested.
OK, no problem.
>
> THE FACT IS, THAT "strlen()" IS DEFINED UNIVERSALLY AS TAKING "char *".
So just don't pass it "unsigned char*". End of story.
>
> That BY DEFINITION means that "strlen()" cannot care about the sign,
> because the sign IS NOT DEFINED UNIVERSALLY!
>
> And if you cannot accept that fact, it's your problem. Not mine.
I never had problems either with strlen() or with this warning, so was
curious why does the warning is such a problem for the kernel. I'm sorry
I took your time and haven't got an answer that I entirely agree
with. Thank you very much for your explanations anyway.
> The warning is CRAP. End of story.
Amen!
-- Sergei.
next prev parent reply other threads:[~2007-02-13 19:59 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-08 15:00 somebody dropped a (warning) bomb Jeff Garzik
2007-02-08 16:33 ` Linus Torvalds
2007-02-08 18:42 ` Jan Engelhardt
2007-02-08 19:53 ` Linus Torvalds
2007-02-08 21:10 ` Jan Engelhardt
2007-02-08 21:37 ` Linus Torvalds
2007-02-08 23:12 ` David Rientjes
2007-02-08 23:37 ` Linus Torvalds
2007-02-09 0:24 ` David Rientjes
2007-02-09 0:42 ` Linus Torvalds
2007-02-09 0:59 ` Linus Torvalds
2007-02-09 0:59 ` David Rientjes
2007-02-09 1:11 ` Linus Torvalds
2007-02-09 1:18 ` David Rientjes
2007-02-09 15:38 ` Linus Torvalds
2007-02-09 3:27 ` D. Hazelton
2007-02-09 19:54 ` Pete Zaitcev
2007-02-09 12:34 ` Jan Engelhardt
2007-02-09 13:16 ` linux-os (Dick Johnson)
2007-02-09 17:45 ` Jan Engelhardt
2007-02-09 20:29 ` linux-os (Dick Johnson)
2007-02-09 22:05 ` Jan Engelhardt
2007-02-09 22:58 ` Martin Mares
2007-02-12 18:50 ` linux-os (Dick Johnson)
2007-02-13 15:14 ` Dick Streefland
2007-02-08 21:13 ` J.A. Magallón
2007-02-08 21:42 ` Linus Torvalds
2007-02-08 22:03 ` Linus Torvalds
2007-02-08 22:19 ` Willy Tarreau
2007-02-09 0:03 ` J.A. Magallón
2007-02-09 0:22 ` Linus Torvalds
2007-02-09 12:38 ` Sergei Organov
2007-02-09 15:58 ` Linus Torvalds
2007-02-12 11:12 ` Sergei Organov
2007-02-12 16:26 ` Linus Torvalds
2007-02-13 18:06 ` Sergei Organov
2007-02-13 18:26 ` Pekka Enberg
2007-02-13 19:14 ` Sergei Organov
2007-02-13 19:43 ` Pekka Enberg
2007-02-13 20:29 ` Sergei Organov
2007-02-13 21:31 ` Jeff Garzik
2007-02-13 23:21 ` Linus Torvalds
2007-02-15 13:20 ` Sergei Organov
2007-02-15 15:57 ` Linus Torvalds
2007-02-15 18:53 ` Sergei Organov
2007-02-15 19:02 ` Linus Torvalds
2007-02-15 20:23 ` me, not " Oleg Verych
2007-02-16 4:26 ` Rene Herman
2007-02-19 11:58 ` Sergei Organov
2007-02-19 13:58 ` Sergei Organov
2007-02-15 22:32 ` Lennart Sorensen
2007-02-13 19:25 ` Linus Torvalds
2007-02-13 19:59 ` Sergei Organov [this message]
2007-02-13 20:24 ` Linus Torvalds
2007-02-15 15:15 ` Sergei Organov
2007-02-13 21:13 ` Rob Landley
2007-02-13 22:21 ` Olivier Galibert
2007-02-14 12:52 ` Sergei Organov
2007-02-15 20:06 ` Sergei Organov
2007-02-09 15:10 ` Sergei Organov
2007-02-08 16:35 ` Kumar Gala
[not found] <7Mj5f-3oz-21@gated-at.bofh.it>
[not found] ` <7MktH-5EW-35@gated-at.bofh.it>
[not found] ` <7Mmvy-vj-17@gated-at.bofh.it>
[not found] ` <7MnBC-2fk-13@gated-at.bofh.it>
[not found] ` <7MoQx-4p8-11@gated-at.bofh.it>
[not found] ` <7MpjE-50z-7@gated-at.bofh.it>
[not found] ` <7MpCS-5Fe-9@gated-at.bofh.it>
[not found] ` <7MDd7-17w-1@gated-at.bofh.it>
[not found] ` <7MGkB-62k-31@gated-at.bofh.it>
[not found] ` <7NHoe-2Mb-37@gated-at.bofh.it>
[not found] ` <7NMe9-1ZN-7@gated-at.bofh.it>
[not found] ` <7Oagl-6bO-1@gated-at.bofh.it>
[not found] ` <7ObvW-89N-23@gated-at.bofh.it>
[not found] ` <7Oc8t-NS-1@gated-at.bofh.it>
2007-02-15 20:08 ` Bodo Eggert
2007-02-16 11:21 ` Sergei Organov
2007-02-16 14:51 ` Bodo Eggert
2007-02-19 11:56 ` Sergei Organov
2007-02-16 12:46 ` Sergei Organov
2007-02-16 17:40 ` Bodo Eggert
2007-02-19 12:17 ` Sergei Organov
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