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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
References: <Pine.LNX.4.33L2.0211101854350.22017-100000@dragon.pdx.osdl.net>
X-Yow: Talking Pinhead Blues:
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From: Andreas Schwab <schwab@suse.de>
Date: Mon, 11 Nov 2002 15:38:15 +0100
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)")
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"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 N?rnberg
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"And now for something completely different."
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