Re: is correct to use waddnstr for utf8 strings?

[Thomas Dickey]

On Thu, May 02, 2019 at 11:48:42AM +0200, Pavel Stehule wrote:
> čt 2. 5. 2019 v 11:27 odesílatel Thomas Dickey <address@hidden> napsal:
> 
> > On Wed, May 01, 2019 at 04:48:01PM +0200, Pavel Stehule wrote:
> > > Hi
> > >
> > > st 1. 5. 2019 v 14:39 odesílatel Pavel Stehule <address@hidden>
> > > napsal:
> > >
> > > > Hi
> > > >
> > > > I try to fix some issues with utf8 chars on Solaris.
> > ...
> > > I wrote small test. Looks so Solaris doesn't work correctly with 3bytes
> > > utf8 chars. Two bytes are ok.
> > >
> > > Is it ncurses issue or Solaris issue?
> >
> > I suspect Solaris (though I might find time on the weekend to investigate
> > this).
> >
> > There's an additional factor that the package is probably rather old.
> >
> 
> I see same behave with integrated Solaris ncurses and with OpenCSW ncurses.

I see (now).  In my 2015-fix, I checked the result of wcwidth in the
screen-update functions, but not the functions which add characters
to the windows.  For whatever reason, that worked for my test-programs,
but this example does not.

The fix will be in today's patch...

(just for the record, this workaround only applies to the WACS_xxx codes
that ncurses knows about -- there are a _lot_ of ambiguous-width characters
in Unicode)

> 
> OpenCSW package is relative fresh

relatively :-)
 
> ncurses version: 6.1, patch: 20180127
> ncurses with wide char support
> ncurses widechar num: 0
> 
> buildin ncursis is older
> 
> ncurses version: 6.0, patch: 20170708
> ncurses with wide char support
> ncurses widechar num: 0

... still, better than MacOS :-)

> > One problem with Solaris, which I worked-around a few years ago,
> > is that all of the line-drawing characters are "ambiguous width",
> > and that Solaris' locale assigns all of those to double-width.
> >
> > See
> >
> > https://invisible-island.net/ncurses/NEWS.html#t20151219
> >
> > and subsequent mention of Solaris.

-- 
Thomas E. Dickey <address@hidden>
https://invisible-island.net
ftp://ftp.invisible-island.net

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