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Re: Double line borders

From: Mike Aubury
Subject: Re: Double line borders
Date: Wed, 25 Mar 2015 13:24:29 +0000

That would mean I'd need to use the wide-character version of ncurses ? 

On 25 March 2015 at 10:49, Thomas Dickey <address@hidden> wrote:
On Wed, Mar 25, 2015 at 09:57:48AM +0000, Mike Aubury wrote:
> Hi,
> Is there a simple way to say I want "double line" borders - rather than the
> normal single line ones ?

yes/no: you could use the ncurses extension which I added in


with the box_set function.  That is not "simple", but would not be done
in a large number of places.

> Alternatively - is it possible to adjust the acsc line in the terminfo
> entry to get it to do the same thing outside of ncurses ?

also yes/not:

a) acsc is a mapping between 8-bit and 8-bit values

b) the double-line values are not implemented in an 8-bit alternate character
   set anywhere (that I'm aware of).   I documented those here:


   but probably should have pointed out in terminfo(5) that there are
   additional codes which are not part of acsc.

   In any case, terminals that are "VT100-compatible" do not have unused
   codes in the existing range to invent new mappings...

c) "outside of ncurses" could mean tput - but tput does not do translations
   using acsc

d) alternatively, another application could make a user-defined capability
   (using "tic -x") such as "wacsc" and assign whatever meaning it needs
   for that.

Thomas E. Dickey <address@hidden>

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