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Subject: Re: Unicode width data inconsistent/outdated
To: cygwin AT cygwin DOT com
References: <f3c1b415-7a26-8bbe-a67f-5619d356f058 AT towo DOT net> <20170726080859 DOT GA24312 AT calimero DOT vinschen DOT de> <5d3cb047-49f8-26a6-d816-387a71486e99 AT cygwin DOT com> <20170726095016 DOT GA25666 AT calimero DOT vinschen DOT de>
From: Thomas Wolff <towo AT towo DOT net>
Message-ID: <289bd98b-e644-888d-07f8-8965b6538373@towo.net>
Date: Wed, 26 Jul 2017 23:43:43 +0200
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Am 26.07.2017 um 11:50 schrieb Corinna Vinschen:
> On Jul 26 03:16, Yaakov Selkowitz wrote:
>> On 2017-07-26 03:08, Corinna Vinschen wrote:
>>> On Jul 26 08:49, Thomas Wolff wrote:
>>>> It would be good to keep wcwidth/wcswidth in sync with the installed
>>>> Unicode data version (package unicode-ucd).
>>>> Currently it seems to be hard-coded (in newlib/libc/string/wcwidth.c);
>>>> it refers to Unicode 5.0 while installed Unicode data suggest 9.0 would
>>>> be used.
>>>> I can provide some scripts to generate the respective tables if desired.
>>>> Thomas
>>> If you can update the newlib files this way and send matching patches
>>> to the newlib list, this would be highly appreciated.
>> Thomas, I just updated unicode-ucd to 10.0 for this purpose.
Thanks.
>
> Oh, and, btw, the comment in wcwidth.c isn't quite correct.  The
> cwstate in newlib is on Unicode 5.2, see newlib/libc/ctype/towupper.c.
Oh, a number of other embedded tables. To make the tow* and isw* 
functions more easily adaptable to Unicode updates, there will be some 
revisions to do here. And the to* and is* ones (without 'w') even refer 
to locales in a way I do not understand. Maybe I'll restrict my effort 
to wcwidth first...
Thomas

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