From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-workers-return-35122-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 18258 invoked by alias); 14 May 2015 09:53:58 -0000
Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Workers List <zsh-workers.zsh.org>
List-Post: <mailto:zsh-workers@zsh.org>
List-Help: <mailto:zsh-workers-help@zsh.org>
X-Seq: 35122
Received: (qmail 20045 invoked from network); 14 May 2015 09:53:56 -0000
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_HI,
	SPF_HELO_PASS autolearn=ham version=3.3.2
X-AuditID: cbfec7f5-f794b6d000001495-18-555470b02147
Date: Thu, 14 May 2015 10:53:49 +0100
From: Peter Stephenson <p.stephenson@samsung.com>
To: Emanuel Berg <embe8573@student.uu.se>, zsh-workers@zsh.org
Subject: Re: why do ceil/floor give the decimal dot?
Message-id: <20150514105349.52338d94@pwslap01u.europe.root.pri>
In-reply-to: <B6914C0C-15CA-4FE2-A21A-4320D4CD4927@larryv.me>
References: <87oalodmns.fsf@debian.uxu>
 <150513195617.ZM29493@torch.brasslantern.com> <87d223et0a.fsf@debian.uxu>
 <B6914C0C-15CA-4FE2-A21A-4320D4CD4927@larryv.me>
Organization: Samsung Cambridge Solution Centre
X-Mailer: Claws Mail 3.7.9 (GTK+ 2.22.0; i386-redhat-linux-gnu)
MIME-version: 1.0
Content-type: text/plain; charset=UTF-8
Content-transfer-encoding: quoted-printable
X-Brightmail-Tracker:
 H4sIAAAAAAAAA+NgFjrHLMWRmVeSWpSXmKPExsVy+t/xy7obCkJCDa6eVLbYfCnV4mDzQyYH
	Jo/+1qmsHqsOfmAKYIrisklJzcksSy3St0vgyljdtpGl4BBzxfkbK5kaGF8ydTFyckgImEg8
	m/uEGcIWk7hwbz1bFyMXh5DAUkaJXU+amCGcBiaJFZfXsUM42xgl3rSfZQVpYRFQlfjTd4Ed
	xGYTMJSYumk2I4gtImAn8aVjN9gKYaAVx1oXgK3gFbCXWHj7PFgNp4CtxIkbz5gghi5jlJjw
	4QJYA7+AvsTVv5+g7rOXmHnlDCNEs6DEj8n3WEBsZgF1iUnzFjFD2NoST95dADtICCh+4+5u
	9gmMQrOQtMxC0jILScsCRuZVjKKppckFxUnpuUZ6xYm5xaV56XrJ+bmbGCGh/HUH49JjVocY
	BTgYlXh4OQyDQ4VYE8uKK3MPMUpwMCuJ8K6PDgkV4k1JrKxKLcqPLyrNSS0+xCjNwaIkzjtz
	1/sQIYH0xJLU7NTUgtQimCwTB6dUA+Pc70sKeVo/vFr6z1mKWSnD6M6V5pYHu3c02XXE8rek
	dPMt+Pnp3QOvKTnrk4ufT/fMWDjntXtb2ZTVttm79+u3ef64WrOne29HtdDpSdO8u29bn9XT
	7L5ceEFlo3tifIgGH0vDTNkMU15xl+SKvsoVqadmJJedb70j1PLm7I0XP/bMM9YzrlBiKc5I
	NNRiLipOBACYrFtXYQIAAA==

On Wed, 13 May 2015 23:53:53 -0400
Lawrence Vel=C3=A1zquez <vq@larryv.me> wrote:
> - "ceil(log(30)/log(2))" returns floating-point "5."

... as noted, this is down to the C math library function returning
floating point.   It has to do this because it doesn't know the result
fits in an integer --- ceil(5e30) is a perfectly valid calculation.  See
the manual page.

So if you're happy it does fit, just convert to integer yourself.

pws