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xanadu - xml-tree

This commit is contained in:
erana 2012-01-21 23:00:11 +09:00
parent 760a8cbe40
commit 0def370ecd
1 changed files with 8 additions and 9 deletions
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17
scsh/xanadu/b-tree.scm
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@ -80,12 +80,10 @@
(make-vector n-ary (make-b-tree-node #f #f))
(make-vector n-ary (make-b-tree-node #f #f)))))
(define (vector-median v)
(let ((len (ceiling (/ (vector-length v) 2))))
(let ((retl (make-vector len (make-b-tree-node #f #f)))
(retr (if (odd? len)
(make-vector (+ len 1) (make-b-tree-node #f #f))
(make-vector len (make-b-tree-node #f #f)))))
(define (vector-median j v)
(let ((len (vector-length v)))
(let ((retl (make-vector (- j 1) (make-b-tree-node #f #f)))
(retr (make-vector (- len (+ j 1)) (make-b-tree-node #f #f))))
(do ((i 0 (+ i 1)))
((= i len)(list retl retr))
(vector-set! retl i (vector-ref v i))
@ -165,12 +163,13 @@
(else (add-rec str side-tree-node)))));;NOTE add-rec not the other add-rec
)
((let* ((data (((vector-ref side-tree i) 'get-data)))
(left-and-right (vector-median side-tree));;FIXME right also descend
(left-and-right (vector-median i side-tree));;FIXME right also descend
(new-node (make-b-tree-node
(car left-and-right)
(cadr left-and-right))));;FIXME lenght mustbe n-ary
(or data (and (string? data)(string=? data "")))
(or (not data)
(and data (string? data)(string=? data "")))
((new-node 'set-data!) str)
;;((side-tree 'set-left-with-index!) i new-node)
(vector-set! side-tree i new-node)
@ -184,7 +183,7 @@
(and (string? data)
(string<? str data)
(string>? str data)))
(let ((left-and-right (vector-median side-tree)))
(let ((left-and-right (vector-median i side-tree)))
(let ((new-node (make-b-tree-node (car left-and-right) (cadr left-and-right))))
((new-node 'set-data!) str)
(vector-set! side-tree i new-node)