1 ! Copyright (C) 2005, 2009 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: arrays kernel math sbufs sequences sequences.private
9 : ?chomp ( seq begin tester chopper -- newseq ? )
10 [ [ 2dup ] dip call ] dip
11 [ [ length ] dip call t ] curry
12 [ drop f ] if ; inline
16 : ?head ( seq begin -- newseq ? )
17 [ head? ] [ tail ] ?chomp ;
19 : ?head-slice ( seq begin -- newseq ? )
20 [ head? ] [ tail-slice ] ?chomp ;
22 : ?tail ( seq end -- newseq ? )
23 [ tail? ] [ head* ] ?chomp ;
25 : ?tail-slice ( seq end -- newseq ? )
26 [ tail? ] [ head-slice* ] ?chomp ;
30 : subseq-range ( seq subseq -- from/f to/f )
31 [ subseq-index ] keep '[ dup _ length + ] [ f f ] if* ; inline
33 : (split1) ( seq subseq snip-quot -- before after )
34 [ [ subseq-range ] keepd over ] dip [ 2nip f ] if ; inline
38 : split1 ( seq subseq -- before after )
41 : split1-slice ( seq subseq -- before-slice after-slice )
42 [ snip-slice ] (split1) ;
44 : split-subseq ( seq subseq -- seqs )
48 [ dup ] swap '[ _ split1-slice swap ] produce nip
51 : replace ( seq old new -- new-seq )
52 pick [ [ split-subseq ] dip ] dip join-as ;
56 : (split1-when) ( ... seq quot: ( ... elt -- ... ? ) snip-quot -- ... before-slice after-slice )
57 [ dupd find drop ] dip '[ dup 1 + rot @ ] [ f ] if* ; inline
61 : split1-when ( ... seq quot: ( ... elt -- ... ? ) -- ... before after )
62 [ snip ] (split1-when) ; inline
64 : split1-when-slice ( ... seq quot: ( ... elt -- ... ? ) -- ... before-slice after-slice )
65 [ snip-slice ] (split1-when) ; inline
67 : split1-last ( seq subseq -- before after )
68 [ <reversed> ] bi@ split1 [ reverse ] bi@
71 : split1-last-slice ( seq subseq -- before-slice after-slice )
72 [ <reversed> ] bi@ split1-slice [ <reversed> ] bi@
73 [ f ] [ swap ] if-empty ;
77 :: (split-when) ( seq quot: ( ... elt -- ... ? ) slice-quot -- pieces )
79 [ [ seq quot find-from drop dup ] keep -rot ]
80 [ [ seq slice-quot call ] keep 1 + swap ]
81 V{ } produce-as nip swap
82 seq length seq slice-quot call suffix! { } like ; inline
86 : split-when ( ... seq quot: ( ... elt -- ... ? ) -- ... pieces )
87 [ subseq-unsafe ] (split-when) ; inline
89 : split-when-slice ( ... seq quot: ( ... elt -- ... ? ) -- ... pieces )
90 [ <slice-unsafe> ] (split-when) ; inline
92 : split ( seq separators -- pieces )
93 '[ _ member? ] split-when ; inline
95 : split-slice ( seq separators -- pieces )
96 '[ _ member? ] split-when-slice ; inline
98 : split-indices ( seq indices -- pieces )
99 over length suffix 0 swap [
100 [ pick subseq ] keep swap
103 ! split-lines uses string-nth-fast which is 50% faster over
104 ! nth-unsafe. be careful when changing the definition so that
105 ! you don't unoptimize it.
106 GENERIC: split-lines ( seq -- seq' )
108 ALIAS: string-lines split-lines
110 M: string split-lines
111 [ V{ } clone 0 ] dip [ 2dup bounds-check? ] [
112 2dup [ "\r\n" member? ] find-from swapd [
113 over [ [ nip length ] keep ] unless
114 [ "" subseq-as suffix! ] 2keep [ 1 + ] dip
116 2dup ?nth CHAR: \n eq? [ [ 1 + ] dip ] when
118 ] while 2drop { } like ;
120 M: sbuf split-lines "" like split-lines ;
122 : join-lines-as ( seq exemplar -- seq ) "\n" swap join-as ; inline
123 : join-lines ( seq -- seq ) "" join-lines-as ; inline
124 : split-words ( seq -- seq ) " " split ; inline
125 : join-words-as ( seq exemplar -- seq ) " " swap join-as ; inline
126 : join-words ( seq -- seq ) " " join-words-as ; inline