Hi,
in immediate execution mode you can do:
* )HOST tput clear*
which is rather portable. In programs, you can do the same:
*'lib_file_io.so' ⎕FX 'FILE_IO' ◊ FILE_IO[25] FILE_IO[24] 'tput clear >
/dev/tty'*
Interestingly the ^L (aka ⎕AV[13]) is printed::
*eedjsa@server64:~/projects/juergen/apl-1.3/src$ ./apl > x**
**... typing blindly ...**
**eedjsa@server64:~/projects/juergen/apl-1.3/src$ vi x**
**
**
** ______ _ __ __ __ ___ ____ __**
** / ____// | / // / / / / | / __ \ / /**
** / / __ / |/ // / / / / /| | / /_/ // /**
** / /_/ // /| // /_/ / / ___ | / ____// /___**
** \____//_/ |_/ \____/ /_/ |_|/_/ /_____/**
**
** Welcome to GNU APL version 1.3 / 6786**
**
** Copyright (C) 2008-2014 Dr. Jürgen Sauermann**
** Banner by FIGlet: www.figlet.org**
**
** This program comes with ABSOLUTELY NO WARRANTY;**
** for details run: ./apl --gpl.**
**
** This program is free software, and you are welcome to
redistribute it**
** according to the GNU Public License (GPL) version 3 or later.**
**
**^[[30m^[[47m^[[K ⎕AV[13]**
**^[[30m^[[48m^[[K^L**
**^[[30m^[[47m^[[K )off**
**^[[m^[(B^[[K^[[30m^[[48m^[[K**
**Goodbye.**
**"x" 23L, 1104C 11,24 All*
If I "cat" the same file then the screen is not cleared.
On 05/27/2014 02:46 AM, Elias Mårtenson wrote:
That's a very alluring thing. :-) It's bad though, since it will come
out as garbage if the output device does not support it.
Regards,
Elias
On 27 May 2014 08:43, "Frederick H. Pitts" <fred.pi...@comcast.net
<mailto:fred.pi...@comcast.net>> wrote:
Blake,
If you are looking for instant gratification,
⍞ ← (⎕UCS 27), '[2J'
will do the job on any terminal that honors ansi escape sequences.
Regards,
Fred
Retired Chemical Engineer
On Mon, 2014-05-26 at 19:29 -0500, Blake McBride wrote:
> Dear Elias,
>
>
> On one hand, I would still love to see a basic ^L ability without
> having to get into external code.
>
>
> On the other hand, perhaps I should start to take a look at library
> code. (I actually have over 20 years of C experience.) I fear my
> reaction once I see how it works. I'm sure the possibilities are
> endless. I haven't even looked at it yet. Is there a hello world
> sample?
>
>
> Thanks.
>
>
> Blake
>
>
>
>
> On Mon, May 26, 2014 at 6:47 PM, Elias Mårtenson
<loke...@gmail.com <mailto:loke...@gmail.com>>
> wrote:
> The correct way to do that is to use the native interface to
> provide an interface to Curses. It should be fairly
trivial to
> implement.
>
>
> On 27 May 2014 07:32, "Blake McBride"
<blake1...@gmail.com <mailto:blake1...@gmail.com>>
> wrote:
> >
> > If I execute ⎕AV[8] the terminal sounds the bell. If
I type
> ^L my xterm screen clears. I need one of the ⎕AV characters
> to do what ^L does. That gives me the absolute basics of
> screen IO.
> >
> > Thanks.
> >
> > Blake
> >
>
>
>
>
>
