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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Howto read line from a stream
Date: Mon, 1 Jun 2009 18:34:03 -0500
Organization: Jacob Sparre Andersen
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Date: 2009-06-01T18:34:03-05:00
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"sjw" <simon.j.wright@mac.com> wrote in message 
news:03bab021-0df6-445b-b2f7-7a3ab770448c@b1g2000vbc.googlegroups.com...
On May 31, 12:34 pm, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
wrote:
>> One potential problem with using Streams as an interface to sockets is 
>> that
>> there is nothing in the Ada standard that mandates Stream_Element to be 
>> an
>> octet of bits, as socket I/O demands.
>
>Can't imagine what reason an implementer would have to make a stream
>element anything other than an octet! (for any general-purpose
>processor you'd actually be likely to come across).

Our U2200 compiler used Stream_Element'Size = 9, as that was the native 
character size on that machine (36-bit words). Using 'Size = 8 would have 
required horrific code to access elements.

I don't think there are many modern machines that would be other than 8, 
however.

(And socket I/O probably used 9-bit bytes on that machine as well, although 
I don't remember the details anymore.)

                                       Randy.