Messages in this thread | | | Subject | Re: [PATCH] Re: sscanf("-1", "%d", &i) fails, returns 0 | From | Andreas Schwab <> | Date | Mon, 11 Nov 2002 15:38:15 +0100 |
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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 Nürnberg Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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