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Date: Thu, 14 May 2009 16:42:31 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: [1.7] Proposal: the filename encoding in C locale uses UTF-8 	instead of SO/UTF-8
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On May 14 23:06, IWAMURO Motonori wrote:
> 2009/5/14 Corinna Vinschen <corinna-cygwin AT cygwin DOT com>:
> > I see a couple of potential problems.
> 
> What problems are those?

I have no example off-hand.  When I thought about it I always got sick
thinking about scenarios where the library is using, say, UTF-8, and the
application is using SJIS, and what happens to the filenames in this
case.  In theory the lib should provide what the application thinks it
right.

> > And have some time to discuss whether these are something the
> > user can or even should fix or workaround alone.
> 
> I think that the application that use locale by the environment
> variable and the application that use no locale should be able to read
> and write the same byte sequence.

Ok, you got as point there.  Assuming we leave out any application
which deliberately uses a non-"C" locale which differs from the setting
in the environment.  Then we're getting into trouble.

If Cygwin uses internally always the environment setting, we have a
valid, identical byte stream for all applications using
setlocale(LC_ALL, ""), *and* for non locale-aware applications.

But if the application uses a deliberately different setting via
setlocale, ..., hmm.  It should get what it asks for.

Maybe, you're right.  I have to test this a bit.


Thanks for your input,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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