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=unavailable autolearn_force=no version=3.4.4
Path: 
 eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!news.eternal-september.org!feeder.eternal-september.org!gandalf.srv.welterde.de!news.jacob-sparre.dk!franka.jacob-sparre.dk!pnx.dk!.POSTED!not-for-mail
From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Introductory Presentations, especially aimed at C++ programmers!
Date: Fri, 9 Dec 2016 16:01:18 -0600
Organization: JSA Research & Innovation
Message-ID: <o2f9je$iou$1@franka.jacob-sparre.dk>
References: 
 <jece55l78ag2atq3emcqtpvtj9pri91qug@4ax.com><a18053a0-2566-4e12-a2d0-0def9828c19a@googlegroups.com><1905815374.502825168.454102.laguest-archeia.com@nntp.aioe.org><o29kmm$mt7$1@dont-email.me>
 <o2a4fn$jdk$1@franka.jacob-sparre.dk><o2a6vq$q8s$1@dont-email.me>
 <877f7b5llo.fsf@nightsong.com>
NNTP-Posting-Host: rrsoftware.com
X-Trace: franka.jacob-sparre.dk 1481320879 19230 24.196.82.226 (9 Dec 2016
 22:01:19 GMT)
X-Complaints-To: news@jacob-sparre.dk
NNTP-Posting-Date: Fri, 9 Dec 2016 22:01:19 +0000 (UTC)
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2900.5931
X-RFC2646: Format=Flowed; Original
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157
Xref: news.eternal-september.org comp.lang.ada:32705
Date: 2016-12-09T16:01:18-06:00
List-Id: <comp.lang.ada>

"Paul Rubin" <no.email@nospam.invalid> wrote in message 
news:877f7b5llo.fsf@nightsong.com...
>> exponentially better than being prevented from overflowing a buffer is
>> being able to figure out how to do
>> declare
>>    B : Buffer (1 .. Just_The_Right_Size);
>
> Alternatively the buffer could be dynamically sized according to the
> data.  That's not in the Ada spirit because of the possible OOM and
> memory allocation latency getting in the way of embedded realtime
> applications, but for a workstation app it's perfectly workable.
> Horses for courses.

That's one possible way to use the API in question, since there's no way to 
find out beforehand how much data you'll need. (You could ask for the size 
ahead of time, but of course that's a potential race condition so it doesn't 
really help.)

                                 Randy.