[RFC] Refresh iswblank and iswspace (was Re: Update wctype functions to Unicode 5.2?)

Corinna Vinschen vinschen@redhat.com
Tue Feb 16 11:12:00 GMT 2010

On Feb 15 20:25, Howland Craig D (Craig) wrote:
> Both C99 and POSIX say that blank is only space and horizontal tab in
> the C/POSIX locale.  So strictly speaking, it would appear that a
> locale check would be needed.  (On the other hand, it could possibly be
> considered a mistake in the standards to make such a statement,
> ignoring any definitions provided with the extended character set.)
> This observation, however, is not directly related to the patch under
> consideration, but is pointing to an existing flaw.

Right.  I don't worry for now, but we should fix that soon.

I'd suggest to check for the locale being exactly "C" and if so, only
return chars <= 0x7f.  Every other locale is undefined and so allows to
report any character in the Unicode range.


Corinna Vinschen
Cygwin Project Co-Leader
Red Hat

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