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,FREEMAIL_FROM
	autolearn=unavailable autolearn_force=no version=3.4.4
X-Received: by 2002:a24:294f:: with SMTP id p76mr6313225itp.34.1546786428668;
        Sun, 06 Jan 2019 06:53:48 -0800 (PST)
X-Received: by 2002:aca:cc0f:: with SMTP id c15mr725497oig.3.1546786428430;
 Sun, 06 Jan 2019 06:53:48 -0800 (PST)
Path: 
 eternal-september.org!reader01.eternal-september.org!feeder.eternal-september.org!news.gegeweb.eu!gegeweb.org!usenet-fr.net!fdn.fr!proxad.net!feeder1-2.proxad.net!209.85.166.216.MISMATCH!q69no552874itb.0!news-out.google.com!v71ni546ita.0!nntp.google.com!k10no554247itk.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups: comp.lang.ada
Date: Sun, 6 Jan 2019 06:53:48 -0800 (PST)
In-Reply-To: <g9ebtsFkj47U1@mid.individual.net>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com;
 posting-host=87.116.183.48;
 posting-account=z-xFXQkAAABpEOAnT3LViyFXc8dmoW_p
NNTP-Posting-Host: 87.116.183.48
References: <a7817950-7d44-4907-bf04-6c8be81e94dd@googlegroups.com>
 <g9ebtsFkj47U1@mid.individual.net>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <a5d101fd-42f2-4a5d-b6e3-49d614f6c1fd@googlegroups.com>
Subject: Re: Determining size of Standard_Input (when file contents are piped
 into a program).
From: Bojan Bozovic <bozovic.bojan@gmail.com>
Injection-Date: Sun, 06 Jan 2019 14:53:48 +0000
Content-Type: text/plain; charset="UTF-8"
Xref: reader01.eternal-september.org comp.lang.ada:55224
Date: 2019-01-06T06:53:48-08:00
List-Id: <comp.lang.ada>

On Sunday, January 6, 2019 at 1:51:11 PM UTC+1, Niklas Holsti wrote:
> On 19-01-06 13:02 , Bojan Bozovic wrote:
> > Is there platform independent way to do this? I was unable to find
> > anything in RM under Ada.text_IO.
> 
> I would say that this is impossible in principle. On some systems, other 
> concurrent programs can write more data into the input file as your 
> program is reading the file, so the input file can grow during the 
> execution of the program, and may not even have any fixed upper bound on 
> its size (apart from the total space available in the system).
> 
> IMO the only robust way is to read all of standard input and store it 
> within the program, or in a temporary file, and then process the stored 
> data.
> 
> -- 
> Niklas Holsti
> Tidorum Ltd
> niklas holsti tidorum fi
>        .      @       .

Yes that makes sense. Thank you.