From: viro@parcelfarce.linux.theplanet.co.uk
To: tom st denis <tomstdenis@yahoo.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 0xdeadbeef vs 0xdeadbeefL
Date: Wed, 7 Jul 2004 04:00:29 +0100 [thread overview]
Message-ID: <20040707030029.GD12308@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <20040707000612.39528.qmail@web41112.mail.yahoo.com>
On Tue, Jul 06, 2004 at 05:06:12PM -0700, tom st denis wrote:
> --- David Eger <eger@havoc.gtf.org> wrote:
> > Is there a reason to add the 'L' to such a 32-bit constant like this?
> > There doesn't seem a great rhyme to it in the headers...
>
> IIRC it should have the L [probably UL instead] since numerical
> constants are of type ``int'' by default.
>
> Normally this isn't a problem since int == long on most platforms that
> run Linux. However, by the standard 0xdeadbeef is not a valid unsigned
> long constant.
... and that would be your F for C101. Suggested remedial reading before
you take the test again: any textbook on C, section describing integer
constants; alternatively, you can look it up in any revision of C standard.
Pay attention to difference in the set of acceptable types for decimal
and heaxdecimal constants.
next prev parent reply other threads:[~2004-07-07 3:00 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-06 21:56 0xdeadbeef vs 0xdeadbeefL David Eger
2004-07-07 0:06 ` tom st denis
2004-07-07 3:00 ` viro [this message]
2004-07-07 11:10 ` tom st denis
2004-07-07 11:18 ` Prohibited attachment type (was 0xdeadbeef) Richard B. Johnson
2004-07-07 11:48 ` tom st denis
2004-07-07 12:29 ` Jakub Jelinek
2004-07-08 5:52 ` Pavel Machek
2004-07-08 14:03 ` Jakub Jelinek
2004-07-07 12:13 ` R. J. Wysocki
2004-07-07 14:22 ` 0xdeadbeef vs 0xdeadbeefL viro
2004-07-07 18:47 ` tom st denis
2004-07-07 16:30 ` Gabriel Paubert
2004-07-07 18:41 ` tom st denis
2004-07-07 18:47 ` Christoph Hellwig
2004-07-07 18:53 ` tom st denis
2004-07-07 23:17 ` Harald Arnesen
2004-07-08 6:15 ` David Weinehall
2004-07-08 9:32 ` [OT] " Gabriel Paubert
2004-07-08 11:15 ` viro
2004-07-08 11:55 ` Gabriel Paubert
2004-07-08 16:41 ` Andries Brouwer
2004-07-08 17:13 ` Michael Driscoll
2004-07-08 17:16 ` Horst von Brand
2004-07-10 1:52 ` Andrew Rodland
2004-07-07 0:38 ` Richard B. Johnson
2004-07-07 4:52 ` David Eger
2004-07-07 11:40 ` Richard B. Johnson
-- strict thread matches above, loose matches on Subject: below --
2004-07-07 2:05 Ray Lee
2004-07-07 3:02 ` viro
2004-07-07 5:58 ` Alexandre Oliva
2004-07-07 6:12 ` Ray Lee
2004-07-07 5:55 ` Alexandre Oliva
2004-07-07 6:08 ` Ray Lee
2004-07-07 6:48 ` viro
2004-07-07 17:58 ` Alexandre Oliva
2004-07-12 17:31 ` H. Peter Anvin
2004-07-07 7:30 ` Tomas Szepe
2004-07-07 14:34 ` Jan-Benedict Glaw
2004-07-12 17:50 ` H. Peter Anvin
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