lkml.org 
[lkml]   [2002]   [Nov]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [PATCH] Re: sscanf("-1", "%d", &i) fails, returns 0
    From
    Date
    "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/

    \
     
     \ /
      Last update: 2005-03-22 13:30    [W:0.023 / U:0.544 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site