linux-kernel - Re: [PATCH 1/1] lib/vsprintf.c: "%#o",0 becomes '0' instead of '00'

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Message-ID: <CAPXGRDkgEKFU7fVDqz33C9vqjdxmBYTbPEPbcfhpkg0NxOJz-g@mail.gmail.com>
Date:	Mon, 7 May 2012 04:20:18 +0200
From:	Pierre Carrier <pierre@...tify.com>
To:	Joe Perches <joe@...ches.com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] lib/vsprintf.c: "%#o",0 becomes '0' instead of '00'

On Mon, May 7, 2012 at 3:59 AM, Joe Perches <joe@...ches.com> wrote:
> If you do this, why not change 0-7 instead of just 0?

Consistency with POSIX *printf.

"#: Specifies that the value is to be converted to an alternative
form. For o conversion, it increases the precision (if necessary) to
force the first digit of the result to be zero."
-- http://pubs.opengroup.org/onlinepubs/009695399/functions/printf.html

% cat octal.c;gcc -o octal octal.c;./octal
#include <stdio.h>
void main() {
        int i;
        for (i=0;i<10;i++) printf("%#o ", i);
        puts("");
}
0 01 02 03 04 05 06 07 010 011

-- 
Pierre
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