Re: UTF-8 capable fmt(1)

[Kamil Rytarowski <n54%gmx.com@localhost>]

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On 09.01.2016 15:30, Joerg Sonnenberger wrote:
> On Sat, Jan 09, 2016 at 02:57:27PM +0100, Kamil Rytarowski wrote:
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>> 
>> On 09.01.2016 02:46, Thomas Klausner wrote:
>>> On Sat, Jan 09, 2016 at 02:36:07AM +0100, Kamil Rytarowski
>>> wrote:
>>>> 1. I have an impression that it's basically moving the focus 
>>>> from ASCII to narrowed-down UTF-8, while there are plenty of 
>>>> other locales and character systems.
>>> 
>>> It uses standard headers like locale.h, wchar.h and wctype.h,
>>> and uses mbtowc(). What is the problem with these functions?
>>> 
>> 
>> Here is a short explanation by libunistring developers:
>> 
>> http://www.gnu.org/software/libunistring/manual/libunistring.html#The
- -wchar_005ft-mess
>
>> 
> ...and of course, they are mixing stupid things with not
> understanding things. Narrowing i18n support down to Unicode is
> still not a valid approach and ignorant. We should investigate how
> to make wchar_t locale independent. That's not the same as making
> wchar_t UCS4. Doing that is part of the necessary libc work.
> 

Please list necessary steps to make it work properly.

What would represent exactly wchar_t and what would be the underlaying
type? I think we are also limited with wint_t passed as an argument to
isw*() functions.

I noted that something similar is already done in editline(3):
/usr/src/lib/libedit/chartype.h
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