X-Recipient:	archive-cygwin AT delorie DOT com
X-Spam-Check-By:	sourceware.org
Date:	Thu, 24 Feb 2011 12:55:11 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Mg3a - a version of Mg2a developed on Cygwin
Message-ID:	<20110224115511.GU9392@calimero.vinschen.de>
Reply-To:	cygwin AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<35i9m6pt07r66fib882etg5tgirkr413co AT 4ax DOT com> <0105D5C1E0353146B1B222348B0411A209DAA0FF98 AT NIHMLBX02 DOT nih DOT gov> <fklam6ptp2uu7o029pkng8e4vc953fnfme AT 4ax DOT com> <ijmam6h3u1vq8nepvdlfo3hcb5feoeihav AT 4ax DOT com> <20110224085617 DOT GM9392 AT calimero DOT vinschen DOT de> <4nccm61h5q3f207me4u69qfk6i0vqrd2f2 AT 4ax DOT com> <20110224111447 DOT GS9392 AT calimero DOT vinschen DOT de> <epgcm65b24sp2i6eign548lr7s5vl5kbqb AT 4ax DOT com>
MIME-Version:	1.0
In-Reply-To:	<epgcm65b24sp2i6eign548lr7s5vl5kbqb@4ax.com>
User-Agent:	Mutt/1.5.21 (2010-09-15)
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Unsubscribe:	<mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com

On Feb 24 12:40, Bengt Larsson wrote:
> Corinna Vinschen wrote:
> >> Using wcswidth isn't very useful in the editor because it has special
> >> requirements, like showing control characters with ^C.
> >
> >Well, it's not really such a big problem to special case wide char
> >control values and just call wcswidth otherwise...
> 
> Oh I see. wcwidth takes a wchar_t. Handily, Kuhn's implementation takes
> an UCS character. Now I understand what you mean by wcswidth.

Yeah, newlibs wcswidth combines UTF-16 surrogates into UCS-32 chars
and calls the internal __wcwidth function, which is basically Kuhn's
code, and which takes a wint_t as parameter.  Since wint_t is 32 bit...
Of course, this trick doesn't work for wcwidth, which will blindly
call __wcwidth with every incoming surrogate half.


Corinna

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

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -