15 lines
355 B
Factor
15 lines
355 B
Factor
! Copyright (C) 2013 John Benediktsson.
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! See http://factorcode.org/license.txt for BSD license.
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USING: checksums kernel math sequences ;
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IN: checksums.bsd
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SINGLETON: bsd
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M: bsd checksum-bytes ( bytes checksum -- value )
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drop 0 [
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[ [ -1 shift ] [ 1 bitand 15 shift ] bi + ] dip
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+ 0xffff bitand
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] reduce ;
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INSTANCE: bsd checksum
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