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Date: Tue, 18 Oct 2011 16:06:35 +0200
From: Pascal Obry <pascal@obry.net>
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To: Randy Brukardt <randy@rrsoftware.com>
Subject: Re: Why no Ada.Wide_Directories?
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Date: 2011-10-18T16:06:36+02:00
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Randy,

> Now, if an implementation on Windows doesn't have a way to use UTF-8
> encoding, that is an implementation problem, but not one that the Standard
> can do much about.

But I can tell you that supporting UTF-8 on Windows is not trivial at 
all as there is encoding/decoding needed in many places. Doing that is 
not trivial and we had the need to invent the "encoding=[UTF8|8BITS]" 
mode for Text_IO.Open for example. As you say, implementation details, 
but can be easily defeated:

If in my file I have:

    Filename : constant String := "été";

And this file is saved using UTF-8 encoding, then:

    Text_IO.Open (Filename, ..., Mode => "encoding=8bits");

Will just fail. A programmer error? Ok...

Now:

    Text_IO.Get (Filename, Last);
    Text_IO.Open (Filename, ..., Mode => "encoding=8bits");

What if the console is UTF-8?

Pascal.

-- 

--|------------------------------------------------------
--| Pascal Obry                           Team-Ada Member
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