29 lines
739 B
Factor
29 lines
739 B
Factor
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! Copyright (C) 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel accessors sequences byte-arrays bit-arrays math hints ;
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IN: bit-sets
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<PRIVATE
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: bit-set-map ( seq1 seq2 quot -- seq )
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[ 2drop length>> ]
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[
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[
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[ [ length ] bi@ assert= ]
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[ [ underlying>> ] bi@ ] 2bi
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] dip 2map
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] 3bi bit-array boa ; inline
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PRIVATE>
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: bit-set-union ( seq1 seq2 -- seq ) [ bitor ] bit-set-map ;
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HINTS: bit-set-union bit-array bit-array ;
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: bit-set-intersect ( seq1 seq2 -- seq ) [ bitand ] bit-set-map ;
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HINTS: bit-set-intersect bit-array bit-array ;
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: bit-set-diff ( seq1 seq2 -- seq ) [ bitnot bitand ] bit-set-map ;
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HINTS: bit-set-diff bit-array bit-array ;
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