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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: 103376,91965a012526b259
X-Google-Attributes: gid103376,public
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news1.google.com!news1.google.com!fu-berlin.de!uni-berlin.de!not-for-mail
From: Nick Roberts <nick.roberts@acm.org>
Newsgroups: comp.lang.ada
Subject: Re: Float to String
Date: Mon, 08 Nov 2004 21:29:35 +0000
Message-ID: <2va6q0F2gvpugU1@uni-berlin.de>
References: <uekj4l18j.fsf@obry.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: news.uni-berlin.de IJkmNI/OdXr33yPVQy4eVAJT6B5rFY4KEIu+Wh752TGSNuaqs=
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US;
 rv:1.7.2) Gecko/20040803
X-Accept-Language: en-us, en
In-Reply-To: <uekj4l18j.fsf@obry.net>
Xref: g2news1.google.com comp.lang.ada:6056
Date: 2004-11-08T21:29:35+00:00
List-Id: <comp.lang.ada>

Pascal Obry wrote:

> I was wondering if there is a way to save a float into a string and read it
> back without loosing precision ?
> 
> I tried something like:
> 
>    F_Str : String (1 .. Float'Base'Digits);
> 
>    Float_Text_IO.Put (F_Str, My_Float, Aft => Float'Base'Digits);
> 
> But this is not enough... Ideas ?

If it is not necessary for the string to be human interpretable, you could
take the approach: use streaming to convert the floating point value into
a Storage_Element_Array; write out the array as a sequence of hexadecimal
values into the string. Obviously you do the reverse to convert back to
floating point values.

-- 
Nick Roberts