From owner-freebsd-bugs@FreeBSD.ORG  Fri Aug  9 02:10:01 2013
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Delivered-To: freebsd-bugs@smarthost.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTP id D11913AA
 for <freebsd-bugs@smarthost.ysv.freebsd.org>;
 Fri,  9 Aug 2013 02:10:01 +0000 (UTC)
 (envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
 [IPv6:2001:1900:2254:206c::16:87])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (No client certificate requested)
 by mx1.freebsd.org (Postfix) with ESMTPS id BCBD824A4
 for <freebsd-bugs@smarthost.ysv.freebsd.org>;
 Fri,  9 Aug 2013 02:10:01 +0000 (UTC)
Received: from freefall.freebsd.org (localhost [127.0.0.1])
 by freefall.freebsd.org (8.14.7/8.14.7) with ESMTP id r792A11U042977
 for <freebsd-bugs@freefall.freebsd.org>; Fri, 9 Aug 2013 02:10:01 GMT
 (envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
 by freefall.freebsd.org (8.14.7/8.14.7/Submit) id r792A139042976;
 Fri, 9 Aug 2013 02:10:01 GMT (envelope-from gnats)
Date: Fri, 9 Aug 2013 02:10:01 GMT
Message-Id: <201308090210.r792A139042976@freefall.freebsd.org>
To: freebsd-bugs@FreeBSD.org
Cc: 
From: Andrey Chernov <ache@freebsd.org>
Subject: Re: bin/181152: %i fails with negative hex numbers with sscanf
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
Reply-To: Andrey Chernov <ache@freebsd.org>
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-bugs>,
 <mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
 <mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 09 Aug 2013 02:10:01 -0000

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/
 bitcoin:1G6ugdNY6e5jx1GVnAU2ntj2NEfmjKG85r