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\ Hypervisor Software File: vocab.fth
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id: @(#)vocab.fth 1.3 01/11/30
purpose:
copyright: Copyright 2000-2001 Sun Microsystems, Inc.  All Rights Reserved

unexported-words

: >vocab-acf      ( apf -- acf )  >config-default 1+ #align round-up token@ ;

: vocab-encode    ( adr,len apf -- value )                >vocab-acf voc-string>value ;
: vocab-decode    ( value apf -- adr,len false | n true ) >vocab-acf voc-value>string ;
: get-vocab-value ( value apf -- str,len )                vocab-decode  ?invalid-value ;
 
: set-vocab-value ( value apf -- )
   2dup vocab-decode  if		( value apf n )	
      ." Invalid value for configuration parameter; previous value retained." cr 3drop exit
   then 				( value apf adr,len)
   2drop config-byte! 			( )
;

7 actions
action: ( apf -- value )		config-adr c@  ;
action: ( value apf -- )		set-vocab-value  ;
action: ( apf -- adr )			config-adr  ;
action: ( value apf -- adr,len )	get-vocab-value  ;
action: ( adr,len apf -- value )	vocab-encode ;
action: ( apf -- value )		nodefault? ;
action: ( apf -- value )		>config-default c@ ;

exported-headers

: vocab-variable \ name ( default$ voc -- )
   dup >r				( default$ voc )
   voc-string>value			( default )
   1 config-create c,			( )
   align r> token,			( )
   use-actions				( )
;

: nodefault-vocab-variable \ name ( voc -- )
   1 dup nodefault-create c,            ( voc ) 
   align token,                         ( ) 
   use-actions                          ( ) 
; 

unexported-words