\ ========== Copyright Header Begin ==========================================
\ 
\ Hypervisor Software File: format.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 ============================================
\ format.fth 2.3 90/09/03
\ Copyright 1985-1990 Bradley Forthware

\ Output Formatting
decimal
headerless0

variable lmargin    0 lmargin !
variable rmargin   79 rmargin !
: ?line  (s n -- )
   #out @ +    rmargin @ >  if  cr  lmargin @ spaces  then
;
: ?cr  (s -- )  0 ?line  ;
: to-column  (s column -- )  #out @  -  1 max spaces  ;

variable tabstops  8 tabstops !
: ?to-column ( string-length starting-column -- )
   tuck + rmargin @ >  if
      drop cr  lmargin @ spaces
   else
      #out @ - spaces
   then
;
: .tab  ( string-length -- )
   \ Find the next tab stop after the current cursor position
   rmargin @ tabstops @ +  dup lmargin @  do   ( string-length target-column )
      i  #out @   >=  if  drop i leave  then   ( string-length target-column )
   tabstops @ +loop                            ( string-length target-column )
   ?to-column
;
headers