43 lines
1.5 KiB
Scheme
43 lines
1.5 KiB
Scheme
(library
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(thin-xml)
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(export generate-xml)
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(import (rnrs)
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(list-utils)
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(generators)
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(xml)
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(fmt fmt)
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(only (srfi s1 lists) iota)
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(srfi s27 random-bits))
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(define (div-down n d)
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(floor (/ n d)))
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(define (generate-dev dev-id nr-mappings data-offset)
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(tag 'device `((dev-id . ,dev-id)
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(mapped-blocks . ,nr-mappings)
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(transaction . 1)
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(creation-time . 0)
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(snap-time . 0))
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(tag 'range_mapping `((origin-begin . 0)
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(data-begin . ,data-offset)
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(length . ,nr-mappings)
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(time . 1)))))
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(define (generate-xml max-thins max-mappings)
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(let ((nr-thins ((make-uniform-generator 1 max-thins)))
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(nr-mappings-g (make-uniform-generator (div-down max-mappings 2)
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max-mappings)))
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(let ((nr-mappings (iterate nr-mappings-g nr-thins)))
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(tag 'superblock `((uuid . "")
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(time . 1)
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(transaction . 1)
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(flags . 0)
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(version . 2)
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(data-block-size . 128)
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(nr-data-blocks . ,(apply + nr-mappings)))
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(vcat (map generate-dev
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(iota nr-thins)
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nr-mappings
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(accumulate nr-mappings))))))))
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