From: Vincent Lefevre <vincent@vinc17.org>
To: zsh-workers@sunsite.dk
Subject: Re: Bug#448732: zsh: printf %g -0 outputs 0 instead of -0
Date: Mon, 12 Nov 2007 15:26:47 +0100 [thread overview]
Message-ID: <20071112142647.GL29405@prunille.vinc17.org> (raw)
In-Reply-To: <20071106104620.17b5760c@news01>
On 2007-11-06 10:46:20 +0000, Peter Stephenson wrote:
> On Wed, 31 Oct 2007 12:38:38 -0400
> Clint Adams <schizo@debian.org> wrote:
> > I believe the gist is that since %g calls for a float, -0 should be
> > parsed as negative zero.
>
> I tried the following patch, but on my system (Fedora 7 with glibc
> glibc-2.6-4) strtod() returns the double value 0 (not -0) when parsing
> the input "-0". I confirmed this with a standalone programme. It seems
> pointless working around this in the shell.
The bug in glibc's strtod() was fixed on 2007-08-03:
revision 1.25
date: 2007/08/03 16:45:24; author: drepper; state: Exp; lines: +4 -3
(____STRTOF_INTERNAL): Properly handle -0.
So, zsh has to fix only its bug.
--
Vincent Lefèvre <vincent@vinc17.org> - Web: <http://www.vinc17.org/>
100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/>
Work: CR INRIA - computer arithmetic / Arenaire project (LIP, ENS-Lyon)
next prev parent reply other threads:[~2007-11-12 14:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20071031121911.GA2242@vin.lip.ens-lyon.fr>
2007-10-31 16:38 ` Clint Adams
2007-11-06 10:46 ` Peter Stephenson
2007-11-12 14:26 ` Vincent Lefevre [this message]
2007-11-12 14:30 ` Peter Stephenson
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