All of lore.kernel.org
 help / color / mirror / Atom feed
From: Kay Sievers <lkml001@vrfy.org>
To: linux-kernel@vger.kernel.org
Subject: why does sscanf() does not interpret number length attributes?
Date: Wed, 2 Jul 2003 22:34:33 +0200	[thread overview]
Message-ID: <20030702203433.GA14854@vrfy.org> (raw)

I needed a conversion from hex-string to integer and found
this mail from Linus suggesting sscanf:

http://marc.theaimsgroup.com/?l=linux-kernel&m=101414195507893&w=2

but sscanf in linux-2.5/lib/vsprintf.c interpretes length attributes
only when the type is a string. It uses simple_strtoul() and it will
read the buffer until it finds a non-(hex)digit.

int i;
char str[] ="34AFFE45XYZ";
sscanf(str, "%1x", &i);

i will be '0x34AFFE45' instead of the expected '3'.

Is this behaviour intended or is just nobody caring about?


thanks
Kay


             reply	other threads:[~2003-07-02 20:20 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-02 20:34 Kay Sievers [this message]
2003-07-02 20:55 ` why does sscanf() does not interpret number length attributes? Richard B. Johnson
2003-07-02 22:26   ` Kay Sievers
2003-07-02 23:00 ` Stephen Wille Padnos

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20030702203433.GA14854@vrfy.org \
    --to=lkml001@vrfy.org \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.