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Subject: Re: iswcntrl() regression
To: cygwin@cygwin.com, Assaf Gordon <assafgordon@gmail.com>,
        Bruno Haible <bruno@clisp.org>
References: <24530320.43gEWRNkUz@omega> <cd4691c0-da99-46b5-6001-594499a8d2fa@towo.net> <20181219133711.GJ28727@calimero.vinschen.de> <6550638.IhVCuUnqCC@omega> <20190106202109.GD4430@calimero.vinschen.de>
From: Thomas Wolff <towo@towo.net>
Message-ID: <8758e963-7f32-a3f4-4d66-ce0d0c5f831e@towo.net>
Date: Sun, 6 Jan 2019 23:39:37 +0100
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Am 06.01.2019 um 21:21 schrieb Corinna Vinschen:
> On Dec 19 21:57, Bruno Haible wrote:
>> 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.
> Thomas, any input?  Are you going to provide patches?
Well, yes, now I'm assuming that this is the only WEOF special case and 
I'll look after it this week.
Thomas

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