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Date: Wed, 11 Dec 2013 17:54:25 +0100
From: "G.B." <rm-dash-bau-haus@dash.futureapps.de>
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Subject: Re: Binary versus text and compiler versions, was: Re: Will Ada-95
 Programs Written in MS Windows Run in MacOS and Linux Without Some Tweaking.
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Date: 2013-12-11T17:54:26+01:00
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On 11.12.13 16:14, Eryndlia Mavourneen wrote:
> What is the problem with simply reading binary disk blocks as 8-bit text using Sequential_IO, since Austin wants to use the attributes 'Pos and 'Val on the data stream?

The odd thing is that this discussion is about problems
caused by Text_IO, line endings, ^Z, and the alleged
portability of text files. Which, obviously, is not a fact.

First, potential BOMs added by smart editors or email clients,
automatic line ending transformation (unzip -a), etc.

What is more, if text is read using Text_IO by a program running
on this or that OS, calling this or that compiler's implementation
of Text_IO, of an ISO blessed language (Ada), then still the
results that are computed from the text could well be different.
That is, the interpretation of the message changes, which is
the one thing that text is supposed to prevent...

Not long ago, a magical calendar date (UTC) has passed, way into
the 21st century,

    Hurray : Time := Time_Of
      (Day     =>  (10 + 1),
       Month   =>  (10 + 2),
       Year    =>  (10 + 3) + 2000,
       Seconds => ((10 + 4) * Hour
                 + (10 + 5) * Minute
                 + (10 + 6) * s));

yet it seems we cannot reliably perform basic file I/O.

(Reading binary disk blocks as 8-bit text could work if reading
is not from the network .IFF: padding bits are handled and disk
block sizes agree everywhere and low numbered characters work
at the Text_IO layer. I guess.)