From: Bruno Haible <bruno@clisp.org>
To: Thomas Wolff <towo@towo.net>
Cc: cygwin@cygwin.com, Assaf Gordon <assafgordon@gmail.com>
Subject: Re: iswcntrl() regression
Date: Wed, 19 Dec 2018 21:46:00 -0000 [thread overview]
Message-ID: <6550638.IhVCuUnqCC@omega> (raw)
In-Reply-To: <20181219133711.GJ28727@calimero.vinschen.de>
Hello Thomas,
Oops 1: I forgot to add the reference to POSIX:
http://pubs.opengroup.org/onlinepubs/9699919799/functions/iswcntrl.html
Oops 2:
The relevant expression is iswcntrl (WEOF), not iswcntrl (EOF).
> > Are there any other special requirements concerning EOF?
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 wchar_t.
(Like EOF fits into 'int' but usually does not fit in 'unsigned char'.)
WEOF is special for all functions declared in <wctype.h>, see
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
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
> this could be fixed in iswcntrl_l.c as a special condition, or
> injected as a special case in the categories.t table.
Probably, yes.
Bruno
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next prev parent reply other threads:[~2018-12-19 20:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-19 13:25 Bruno Haible
2018-12-19 13:29 ` Thomas Wolff
2018-12-19 13:39 ` Corinna Vinschen
2018-12-19 21:46 ` Bruno Haible [this message]
2019-01-06 20:21 ` Corinna Vinschen
2019-01-06 22:39 ` Thomas Wolff
2019-01-11 1:07 ` Thomas Wolff
2019-01-11 9:16 ` Corinna Vinschen
2019-01-12 11:39 ` Thomas Wolff
2019-01-08 22:56 ` Wong, Samuel
2019-01-09 23:46 ` Unsubscribing from Cygwin Mailing List (was: iswcntrl() regression) Brian Inglis
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