From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-0.9 required=5.0 tests=BAYES_00,FORGED_GMAIL_RCVD,
	FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: 103376,9ea5d59767aa4a7d
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII
Path: 
 g2news1.google.com!postnews.google.com!y11g2000yqm.googlegroups.com!not-for-mail
From: Gene <gene.ressler@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Truncating a fixed-point value
Date: Fri, 9 Jul 2010 13:39:54 -0700 (PDT)
Organization: http://groups.google.com
Message-ID: 
 <f7b0cc71-bf8c-48bb-b651-b32b30ae3d4a@y11g2000yqm.googlegroups.com>
References: 
 <732bea9d-aacb-4b87-b64b-657aabce6736@w31g2000yqb.googlegroups.com>
NNTP-Posting-Host: 184.12.82.25
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
X-Trace: posting.google.com 1278707995 7956 127.0.0.1 (9 Jul 2010 20:39:55
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Fri, 9 Jul 2010 20:39:55 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: y11g2000yqm.googlegroups.com; posting-host=184.12.82.25;
	posting-account=-BkjswoAAACC3NU8b6V8c50JQ2JBOs04
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_3; en-us)
	AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0 Safari/533.16,gzip(gfe)
Xref: g2news1.google.com comp.lang.ada:12297
Date: 2010-07-09T13:39:54-07:00
List-Id: <comp.lang.ada>

On Jul 9, 3:06=A0pm, Adam Beneschan <a...@irvine.com> wrote:
> I must be suffering from an embarrassing mental block, because I'm
> sure there's a simple solution, but I can't see what it is.
>
> I have a value X of a fixed-point type, X >=3D 0.0, and I need to
> compute Floor(X) as an Integer. =A0'Truncation and 'Floor aren't defined
> for fixed-point types; the type conversion Integer(X) rounds; and
> Integer(X-0.5) fails if X=3D0.0.
>
> How do others do this? =A0Or do I have to resort to an IF statement (or
> conditional expression in Ada 2012) to handle the different cases?
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0-- Adam

There is a prior discussion of this question:

http://coding.derkeiler.com/Archive/Ada/comp.lang.ada/2003-10/0729.html

The problem is that fixed point types don't have to include all the
integers.

An ugly approach is to convert to e.g. a long float, take the floor,
and convert back.  No doubt others will have something more elegant.