obp/obp/os/bootprom/devpaths.fth

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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 )
;