Date: Fri, 9 Aug 2013 02:10:01 GMT From: Andrey Chernov <ache@freebsd.org> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/181152: %i fails with negative hex numbers with sscanf Message-ID: <201308090210.r792A139042976@freefall.freebsd.org>
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The following reply was made to PR kern/181152; it has been noted by GNATS.
From: Andrey Chernov <ache@freebsd.org>
To: Garrett Cooper <yaneurabeya@gmail.com>
Cc: freebsd-gnats-submit@FreeBSD.org
Subject: Re: bin/181152: %i fails with negative hex numbers with sscanf
Date: Fri, 09 Aug 2013 06:05:04 +0400
On 09.08.2013 4:15, Garrett Cooper wrote:
> #define NUM -0x1234
> #define STRNUM __STRING(NUM)
>
> ATF_TC(sscanf_neghex);
> ATF_TC_HEAD(sscanf_neghex, tc)
> {
> atf_tc_set_md_var(tc, "descr",
> "PR lib/21691: %%i and %%x fail with negative hex numbers");
> }
>
> ATF_TC_BODY(sscanf_neghex, tc)
> {
> int i;
>
> sscanf(STRNUM, "%i", &i);
> ATF_REQUIRE(i == NUM);
>
> sscanf(STRNUM, "%x", &i);
> ATF_REQUIRE(i == NUM);
> }
Probably something is wrong with your ATF way, this example works:
#include <stdio.h>
int main() {
int i;
i = 0;
sscanf("-0x1234", "%i", &i);
printf("%d\n", i);
i = 0;
sscanf("-0x1234", "%x", &i);
printf("%d\n", i);
}
-4660
-4660
(which is -0x1234)
Please do not post more ATF examples, use plain ones, many developers
(including me) don't have ATF installed.
--
http://ache.vniz.net/
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