48 lines
1.5 KiB
Scheme
48 lines
1.5 KiB
Scheme
(library
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(cache-xml)
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(export generate-xml)
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(import (rnrs)
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(list-utils)
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(loops)
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(generators)
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(xml)
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(fmt fmt)
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(srfi s27 random-bits)
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(only (srfi s1 lists) iota))
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(define (make-enum-vector count)
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(let ((v (make-vector count)))
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(upto (n count)
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(vector-set! v n n))
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v))
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(define (vector-swap! v n m)
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(let ((tmp (vector-ref v n)))
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(vector-set! v n (vector-ref v m))
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(vector-set! v m tmp)))
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(define (rnd b e)
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(+ b (random-integer (- e b))))
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(define (vector-partial-shuffle! v count)
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(let ((len (vector-length v)))
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(upto (n count)
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(vector-swap! v n (rnd n len)))))
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;;---------------------------------------------------------
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(define (generate-xml block-size nr-origin-blocks nr-cache-blocks)
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(tag 'superblock `((uuid . "")
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(block-size . ,block-size)
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(nr-cache-blocks . ,nr-cache-blocks)
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(policy . "smq")
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(hint-width . 4))
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;; FIXME: what a waste of memory
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(let ((v (make-enum-vector nr-origin-blocks)))
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(vector-partial-shuffle! v nr-cache-blocks)
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(vcat (map (lambda (cblock)
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(tag 'mapping `((cache-block . ,cblock)
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(origin-block . ,(vector-ref v cblock))
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(dirty . "true"))))
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(iota nr-cache-blocks)))))))
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