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Date: Sun, 6 Jan 2019 21:21:09 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: Thomas Wolff <towo AT towo DOT net>
Cc: cygwin AT cygwin DOT com, Assaf Gordon <assafgordon AT gmail DOT com>,
        Bruno Haible <bruno AT clisp DOT org>
Subject: Re: iswcntrl() regression
Message-ID: <20190106202109.GD4430@calimero.vinschen.de>
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Mail-Followup-To: Thomas Wolff <towo AT towo DOT net>, cygwin AT cygwin DOT com,	Assaf Gordon <assafgordon AT gmail DOT com>,	Bruno Haible <bruno AT clisp DOT org>
References: <24530320 DOT 43gEWRNkUz AT omega> <cd4691c0-da99-46b5-6001-594499a8d2fa AT towo DOT net> <20181219133711 DOT GJ28727 AT calimero DOT vinschen DOT de> <6550638 DOT IhVCuUnqCC AT omega>
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On Dec 19 21:57, Bruno Haible wrote:
> Hello Thomas,
>=20
> Oops 1: I forgot to add the reference to POSIX:
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswcntrl.html
>=20
> Oops 2:
> The relevant expression is iswcntrl (WEOF), not iswcntrl (EOF).
>=20
> > > Are there any other special requirements concerning EOF?
>=20
> WEOF is a special value. The difference between wint_t and wchar_t is
> essentially that WEOF fits into wint_t but is not guaranteed to fit in wc=
har_t.
> (Like EOF fits into 'int' but usually does not fit in 'unsigned char'.)
>=20
> WEOF is special for all functions declared in <wctype.h>, see
>=20
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswalnum.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswalpha.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswblank.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswcntrl.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswdigit.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswgraph.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswlower.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswprint.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswpunct.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswspace.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswupper.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswxdigit.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswctype.html
>=20
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/towlower.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/towupper.html
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/towctrans.html
>=20
> > this could be fixed in iswcntrl_l.c as a special condition, or
> > injected as a special case in the categories.t table.
>=20
> Probably, yes.

Thomas, any input?  Are you going to provide patches?


Thanks,
Corinna

--=20
Corinna Vinschen
Cygwin Maintainer

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