113 lines
2.9 KiB
Factor
113 lines
2.9 KiB
Factor
! Copyright (C) 2005, 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: arrays kernel make math sequences sets strings ;
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IN: splitting
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<PRIVATE
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: ?chomp ( seq begin tester chopper -- newseq ? )
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[ [ 2dup ] dip call ] dip
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[ [ length ] dip call t ] curry
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[ drop f ] if ; inline
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PRIVATE>
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: ?head ( seq begin -- newseq ? )
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[ head? ] [ tail ] ?chomp ;
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: ?head-slice ( seq begin -- newseq ? )
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[ head? ] [ tail-slice ] ?chomp ;
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: ?tail ( seq end -- newseq ? )
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[ tail? ] [ head* ] ?chomp ;
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: ?tail-slice ( seq end -- newseq ? )
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[ tail? ] [ head-slice* ] ?chomp ;
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<PRIVATE
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: (split1) ( seq subseq quot -- before after )
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[
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swap [
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[ drop length ] [ start dup ] 2bi
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[ [ nip ] [ + ] 2bi t ]
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[ 2drop f f f ]
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if
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] keep swap
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] dip [ 2nip f ] if ; inline
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PRIVATE>
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: split1 ( seq subseq -- before after )
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[ snip ] (split1) ;
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: split1-slice ( seq subseq -- before-slice after-slice )
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[ snip-slice ] (split1) ;
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: split1-when ( ... seq quot: ( ... elt -- ... ? ) -- ... before after )
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dupd find drop [ swap [ dup 1 + ] dip snip ] [ f ] if* ; inline
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: split1-last ( seq subseq -- before after )
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[ <reversed> ] bi@ split1 [ reverse ] bi@
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dup [ swap ] when ;
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: split1-last-slice ( seq subseq -- before-slice after-slice )
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[ <reversed> ] bi@ split1-slice [ <reversed> ] bi@
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[ f ] [ swap ] if-empty ;
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<PRIVATE
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: (split) ( n seq quot: ( ... elt -- ... ? ) -- )
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[ find-from drop ]
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[ [ [ 3dup swapd subseq , ] dip [ drop 1 + ] 2dip (split) ] 3curry ]
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[ drop [ swap [ tail ] unless-zero , ] 2curry ]
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3tri if* ; inline recursive
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: split, ( ... seq quot: ( ... elt -- ... ? ) -- ... ) [ 0 ] 2dip (split) ; inline
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PRIVATE>
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: split ( seq separators -- pieces )
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[ [ member? ] curry split, ] { } make ; inline
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: split-when ( ... seq quot: ( ... elt -- ... ? ) -- ... pieces )
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[ split, ] { } make ; inline
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<PRIVATE
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: (split*) ( n seq quot: ( ... elt -- ... ? ) -- )
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[ find-from ]
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[ [ [ 1 + ] 3dip [ 3dup swapd subseq , ] dip [ drop ] 2dip (split*) ] 3curry ]
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[ drop [ [ drop ] 2dip 2dup length < [ swap [ tail ] unless-zero , ] [ 2drop ] if ] 2curry ]
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3tri if ; inline recursive
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: split*, ( ... seq quot: ( ... elt -- ... ? ) -- ... ) [ 0 ] 2dip (split*) ; inline
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PRIVATE>
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: split* ( seq separators -- pieces )
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[ [ member? ] curry split*, ] { } make ; inline
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: split*-when ( ... seq quot: ( ... elt -- ... ? ) -- ... pieces )
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[ split*, ] { } make ; inline
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GENERIC: string-lines ( str -- seq )
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M: string string-lines
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dup [ "\r\n" member? ] any? [
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"\n" split
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[
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but-last-slice [
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dup ?last CHAR: \r = [ but-last ] when
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[ CHAR: \r = ] split-when
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] map! drop
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] [
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[ length 1 - ] keep
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[ [ CHAR: \r = ] split-when ] change-nth
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]
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[ concat ]
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tri
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] [
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1array
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] if ;
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