128 lines
3.2 KiB
Factor
128 lines
3.2 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 math sequences sequences.private strings
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sbufs ;
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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 snip-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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: split-subseq ( seq subseq -- seqs )
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[
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1array
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] [
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[ dup ] swap [ split1-slice swap ] curry produce nip
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] if-empty ;
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: replace ( seq old new -- new-seq )
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pick [ [ split-subseq ] dip ] dip join-as ;
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<PRIVATE
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: (split1-when) ( ... seq quot: ( ... elt -- ... ? ) snip-quot -- ... before-slice after-slice )
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[ dupd find drop ] dip [ swap [ dup 1 + ] dip ] prepose [ f ] if* ; inline
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PRIVATE>
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: split1-when ( ... seq quot: ( ... elt -- ... ? ) -- ... before after )
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[ snip ] (split1-when) ; inline
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: split1-when-slice ( ... seq quot: ( ... elt -- ... ? ) -- ... before-slice after-slice )
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[ snip-slice ] (split1-when) ; 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) ( seq quot: ( ... elt -- ... ? ) slice-quot -- pieces )
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[ 0 ] 3dip pick [
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swap curry [ keep 1 + swap ] curry [
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[ find-from drop dup ] 2curry [ keep -rot ] curry
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] dip produce nip
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] 2keep swap [
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[ length swapd ] keep
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] dip 2curry call suffix ; inline
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PRIVATE>
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: split-when ( ... seq quot: ( ... elt -- ... ? ) -- ... pieces )
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[ subseq-unsafe ] (split) ; inline
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: split-when-slice ( ... seq quot: ( ... elt -- ... ? ) -- ... pieces )
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[ <slice-unsafe> ] (split) ; inline
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: split ( seq separators -- pieces )
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[ member? ] curry split-when ; inline
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: split-slice ( seq separators -- pieces )
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[ member? ] curry split-when-slice ; inline
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: split-indices ( seq indices -- pieces )
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over length suffix 0 swap [
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[ pick subseq ] keep swap
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] map 2nip ;
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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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"\r" ?tail drop "\r" split
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] map! drop
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] [
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[ length 1 - ] keep [ "\r" split ] 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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M: sbuf string-lines "" like string-lines ;
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