Re: reasoning behind default of 5 for CCHARW_MAX

[Thomas Dickey]

On Sat, Nov 23, 2019 at 06:55:38AM -0500, Nick Black wrote:
> Thomas Dickey left as an exercise for the reader:
> > hmm - that dates from mid-1995 (first seen in 1.9.2d, undocumented),
> > so it was added by either Eric or Zeyd.  They'd have copied from
> > either a Dell SVr4 or AIX, respectively.
> > 
> > My impression was that one or more of the Unix vendors chose that limit.
> > (I agree it seems excessive).  When Sven and I implemented wide-characters,
> > we left it as is.
> > 
> > I have header files for several systems, and can investigate that
> > to document it (as I did for A_COLOR).
> > 
> > AIX 4 used 5, for instance.  I don't have headers for the Dell SVr4,
> > but have enough information to make a nice story.
...
> but losing one of the great cultures of the world is a bit much.
> I think I might experiment with 3. Glad to hear that AIX thought
> 4 sufficient; that's promising.

That's "5" in "AIX version 4".

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

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