From: Andreas Schwab <schwab@suse.de>
To: "Randy.Dunlap" <rddunlap@osdl.org>
Cc: "Henning P. Schmiedehausen" <hps@intermeta.de>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Re: sscanf("-1", "%d", &i) fails, returns 0
Date: Mon, 11 Nov 2002 15:38:15 +0100 [thread overview]
Message-ID: <jewunkgoiw.fsf@sykes.suse.de> (raw)
In-Reply-To: <Pine.LNX.4.33L2.0211101854350.22017-100000@dragon.pdx.osdl.net> ("Randy.Dunlap"'s message of "Sun, 10 Nov 2002 19:05:05 -0800 (PST)")
"Randy.Dunlap" <rddunlap@osdl.org> writes:
|> On Sun, 10 Nov 2002, Henning P. Schmiedehausen wrote:
|>
|> | "Randy.Dunlap" <rddunlap@osdl.org> writes:
|> |
|> | >+ digit = *str;
|> | >+ if (is_sign && digit == '-')
|> | >+ digit = *(str + 1);
|> |
|> | If signed is not allowed and you get a "-", you're in an error case
|> | again...
|>
|> Yes, and a 0 value is returned.
|> IOW, asking for an unsigned number (in the format string)
|> and getting "-123" does return 0.
Not in C. According to the standard scanf is supposed to convert the
value to unsinged and return that.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
next prev parent reply other threads:[~2002-11-11 14:31 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-08 13:32 sscanf("-1", "%d", &i) fails, returns 0 Douglas Gilbert
2002-11-08 19:22 ` [PATCH] " Randy.Dunlap
2002-11-08 19:41 ` Richard B. Johnson
2002-11-08 19:59 ` Randy.Dunlap
2002-11-08 20:19 ` Linus Torvalds
2002-11-08 22:09 ` Randy.Dunlap
2002-11-10 13:41 ` Henning P. Schmiedehausen
2002-11-11 3:05 ` Randy.Dunlap
2002-11-11 4:19 ` Randy.Dunlap
2002-11-11 9:27 ` Henning Schmiedehausen
2002-11-11 14:38 ` Andreas Schwab [this message]
2002-11-08 20:23 ` Richard B. Johnson
-- strict thread matches above, loose matches on Subject: below --
2002-11-11 14:54 Ray Lee
2002-11-11 19:09 ` Randy.Dunlap
2002-11-11 20:08 ` Andreas Schwab
2002-11-11 20:25 ` Ray Lee
2002-11-13 7:06 ` Randy.Dunlap
2002-11-14 17:34 ` Ray Lee
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