obp/obp/dev/sun4v-devices/console/io.fth

\ ========== Copyright Header Begin ==========================================
\
\ Hypervisor Software File: io.fth
\
\ Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
\
\  - Do no alter or remove copyright notices
\
\  - Redistribution and use of this software in source and binary forms, with
\    or without modification, are permitted provided that the following
\    conditions are met:
\
\  - Redistribution of source code must retain the above copyright notice,
\    this list of conditions and the following disclaimer.
\
\  - Redistribution in binary form must reproduce the above copyright notice,
\    this list of conditions and the following disclaimer in the
\    documentation and/or other materials provided with the distribution.
\
\    Neither the name of Sun Microsystems, Inc. or the names of contributors
\ may be used to endorse or promote products derived from this software
\ without specific prior written permission.
\
\     This software is provided "AS IS," without a warranty of any kind.
\ ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
\ INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
\ PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
\ MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
\ ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
\ DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN
\ OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR
\ FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
\ DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
\ ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
\ SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
\
\ You acknowledge that this software is not designed, licensed or
\ intended for use in the design, construction, operation or maintenance of
\ any nuclear facility.
\
\ ========== Copyright Header End ============================================
id: @(#)io.fth 1.1 06/02/16
purpose:
copyright: Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved.
copyright: Use is subject to license terms.

headerless

h# 60 constant cons-getchar-fun
h# 61 constant cons-putchar-fun

h# 80 constant fast-trap

: (hyperkey) ( -- char error? ) 0 2 cons-getchar-fun fast-trap htrap ;

: hyperemit ( char -- )
   begin
      dup 1 1 cons-putchar-fun fast-trap htrap
      while 1 ms
   repeat drop
;

0 value hyperbreak?

: hyper-maygetchar ( -- char true | false )
   (hyperkey)  if               ( ?? )
      drop false                ( false )
   else                         ( char|break )
      dup -1 =  if              ( break )
         \ BREAK
         to hyperbreak? false   ( false )
      else                      ( char )
         true                   ( char true )
      then                      ( char true | false )
   then                         ( char true | false )
;

variable hyper-keybuf

headers

: hyperkey? ( -- flag )
   hyper-keybuf @ -1 =  if      (  )
      hyper-maygetchar  if      ( char )
         hyper-keybuf !  true   ( flag )
      else                      (  )
         false                  ( flag )
      then                      ( flag )
   else                         (  )
       true                     ( flag )
   then                         ( flag )
;

: hyperkey ( -- char )
   begin  hyperkey?  until  hyper-keybuf @  -1 hyper-keybuf !
;

headerless