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hashtables: reuse (rehash).

db4
John Benediktsson 2013-03-07 22:01:50 -08:00
parent 04af5f2ffb
commit eca5253017
1 changed files with 9 additions and 6 deletions
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15
core/hashtables/hashtables.factor
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@ -87,8 +87,11 @@ TUPLE: hashtable
2 fixnum+fast [ set-slot ] 2keep
1 fixnum+fast set-slot ; inline
: (rehash) ( hash alist -- )
swap [ swapd dupd new-key@ set-nth-pair ] curry assoc-each ; inline
: (set-at) ( value key hash -- )
dupd new-key@ set-nth-pair ; inline
: (rehash) ( alist hash -- )
[ swapd (set-at) ] curry assoc-each ; inline
: hash-large? ( hash -- ? )
[ count>> 3 fixnum*fast 1 fixnum+fast ]
@ -99,7 +102,7 @@ TUPLE: hashtable
[ >alist { array } declare ]
[ assoc-size 1 + ]
[ reset-hash ] tri
] keep swap (rehash) ;
] keep (rehash) ;
: ?grow-hash ( hash -- )
dup hash-large? [ grow-hash ] [ drop ] if ; inline
@ -127,10 +130,10 @@ M: hashtable assoc-size ( hash -- n )
[ count>> ] [ deleted>> ] bi - ; inline
: rehash ( hash -- )
dup >alist [ dup clear-assoc ] dip (rehash) ;
[ >alist ] [ clear-assoc ] [ (rehash) ] tri ;
M: hashtable set-at ( value key hash -- )
dup ?grow-hash dupd new-key@ set-nth-pair ;
dup ?grow-hash (set-at) ;
: associate ( value key -- hash )
1 <hashtable> [ set-at ] keep ; inline
@ -168,7 +171,7 @@ M: assoc new-assoc drop <hashtable> ; inline
M: f new-assoc drop <hashtable> ; inline
: >hashtable ( assoc -- hashtable )
H{ } assoc-clone-like ;
[ >alist ] [ assoc-size <hashtable> ] bi [ (rehash) ] keep ;
M: hashtable assoc-like
drop dup hashtable? [ >hashtable ] unless ; inline