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Date: Mon, 18 Apr 2011 10:57:00 -0000
From: Eli Zaretskii <eliz@gnu.org>
Subject: Re: [RFA-v2] Handle cygwin wchar_t specifics
In-reply-to: <00a801cbfdb4$551214a0$ff363de0$%muller@ics-cnrs.unistra.fr>
To: Pierre Muller <pierre.muller@ics-cnrs.unistra.fr>
Cc: jan.kratochvil@redhat.com, tromey@redhat.com, gdb-patches@sourceware.org
Reply-to: Eli Zaretskii <eliz@gnu.org>
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> From: "Pierre Muller" <pierre.muller@ics-cnrs.unistra.fr>
> Cc: <jan.kratochvil@redhat.com>, <tromey@redhat.com>,        <gdb-patches@sourceware.org>
> Date: Mon, 18 Apr 2011 12:35:26 +0200
> 
> > > -/* If __STDC_ISO_10646__ is defined, then the host wchar_t is UCS-4.
> > > +/* If __STDC_ISO_10646__ is defined, then the host wchar_t is UCS-4 or
> > UCS-2.
> > 
> > Please use UTF-16, not UCS-2.  What Windows uses is the former.  The
> > latter is the old name from the days when Unicode covered only the
> > BMP; it was superseded by UTF-16 that covers more than that.
> 
>   Are you sure this is correct?
> I tried what you said, but "UTF-16" seems to mean "UTF-16BE"
> while UTF-16LE" seems to do a better job.

UTF-16 means both LE and BE varieties.  I meant to use UTF-16 in the
comment, instead of UCS-2.  In the code, you need to use the variety
that suits the endianness of the host platform.

>   But if UTF-16 is better than UCS-2,
> shouldn't we also favor UTF-32 over UCS-4?

IMO, there's no need, since Unicode still didn't exceed 32 bits.