\ LOOK.FS xt -> lfa 22may93jaw
\ Look checks first if the word is a primitive. If yes then the
\ vocabulary in the primitive area is beeing searched, meaning
\ creating for each word a xt and comparing it...
\ If a word is no primitive look searches backwards to find the nfa.
\ Problems: A compiled xt via compile, might be created with noname:
\ a noname: leaves now a empty name field
decimal
\ >NAME PRIMSTART 22may93jaw
\ : >name ( xt -- nfa )
\ BEGIN 1 chars -
\ dup c@ 128 and
\ UNTIL ;
: PrimStart ['] true >name ;
\ look 17may93jaw
: (look) ( xt startlfa -- lfa flag )
false swap
BEGIN @ dup
WHILE dup name>
3 pick = IF nip dup THEN
REPEAT
drop nip
dup 0<> ;
: look ( cfa -- lfa flag )
dup forthstart <
IF PrimStart (look)
ELSE >name true THEN ;
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>