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\ Hypervisor Software File: devpaths.fth
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id: @(#)devpaths.fth 1.2 02/08/20
purpose: extract paths from device tree
copyright: Copyright 1990-2002 Sun Microsystems, Inc.  All Rights Reserved
copyright: Use is subject to license terms.

headerless

: (append-unit) ( phys.. str,len -- )
   " @" 2swap $add 2>r				( )
   current-device >r r@ >parent push-device	( )
   (encode-unit)				( str,len )
   r> push-device				( str,len )
   2r> $add 					( str',len' )
;

: (append-name) ( str,len -- str,len' )
   "name" get-property  if			( str,len )
      " <Unnamed>"				( str,len prop,len )
   else						( str,len prop,len )
      get-encoded-string			( str,len prop,len )
   then 2swap $add 				( str,len' )
;

: (append-name+unit) ( str,len -- str,len' )
   (append-name)				( str,len' )
   get-unit 0= if				( str,len' prop,len )
      2swap 2>r					( prop,len )
      unit-str>phys 2r> (append-unit)		( str,len )
   then						( str,len )
;

: root-device?  ( -- flag )  current-device >parent null =  ;

: (pwd)  ( str,len -- str,len )  recursive
   root-device? 0=  if				( str,len )
      current-device >r  pop-device (pwd)  r> push-device
      " /" 2swap $add (append-name+unit)	( str,len )
   then						( str,len )
;

\ adr len is the full path string.
: pwd$  ( -- adr len )
   root-device?  if				( )
      " /"					( str,len )
   else						( )
      "temp 0 (pwd)				( str,len )
   then						( str,len )
;