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 ;
28 : subseq-range ( seq subseq -- from/f to/f )
29 tuck subseq-index [ dup rot length + ] [ drop f f ] if* ;
31 : ?snip ( from/f to/f seq -- before after )
32 over [ snip ] [ 2nip f ] if ; inline
34 : ?snip-slice ( from/f to/f seq -- before after )
35 over [ snip-slice ] [ 2nip f ] if ; inline
37 : split1 ( seq subseq -- before after )
38 [ subseq-range ] keepd ?snip ; inline
40 : split1-slice ( seq subseq -- before-slice after-slice )
41 [ subseq-range ] keepd ?snip-slice ; inline
43 : split-subseq ( seq subseq -- seqs )
47 [ dup ] swap [ split1-slice swap ] curry produce nip
50 : replace ( seq old new -- new-seq )
51 pick [ [ split-subseq ] dip ] dip join-as ;
53 : split1-when ( ... seq quot: ( ... elt -- ... ? ) -- ... before after )
54 [ find drop ] keepd swap [ dup 1 + rot snip ] [ f ] if* ; inline
56 : split1-when-slice ( ... seq quot: ( ... elt -- ... ? ) -- ... before-slice after-slice )
57 [ find drop ] keepd swap [ dup 1 + rot snip-slice ] [ f ] if* ; inline
59 : split1-last ( seq subseq -- before after )
60 [ <reversed> ] bi@ split1 [ reverse ] bi@
63 : split1-last-slice ( seq subseq -- before-slice after-slice )
64 [ <reversed> ] bi@ split1-slice [ <reversed> ] bi@
65 [ f ] [ swap ] if-empty ;
69 : (split) ( seq quot: ( ... elt -- ... ? ) slice-quot -- pieces )
71 swap curry [ keep 1 + swap ] curry [
72 [ find-from drop dup ] 2curry [ keep -rot ] curry
73 ] dip V{ } produce-as nip
76 ] dip 2curry call suffix! { } like ; inline
80 : split-when ( ... seq quot: ( ... elt -- ... ? ) -- ... pieces )
81 [ subseq-unsafe ] (split) ; inline
83 : split-when-slice ( ... seq quot: ( ... elt -- ... ? ) -- ... pieces )
84 [ <slice-unsafe> ] (split) ; inline
86 : split ( seq separators -- pieces )
87 [ member? ] curry split-when ; inline
89 : split-slice ( seq separators -- pieces )
90 [ member? ] curry split-when-slice ; inline
92 : split-indices ( seq indices -- pieces )
93 over length suffix 0 swap [
94 [ pick subseq ] keep swap
97 ! split-lines uses string-nth-fast which is 50% faster over
98 ! nth-unsafe. be careful when changing the definition so that
99 ! you don't unoptimize it.
100 GENERIC: split-lines ( seq -- seq' )
102 ALIAS: string-lines split-lines
104 M: string split-lines
105 [ V{ } clone 0 ] dip [ 2dup bounds-check? ] [
106 2dup [ "\r\n" member? ] find-from swapd [
107 over [ [ nip length ] keep ] unless
108 [ "" subseq-as suffix! ] 2keep [ 1 + ] dip
110 2dup ?nth CHAR: \n eq? [ [ 1 + ] dip ] when
112 ] while 2drop { } like ;
114 M: sbuf split-lines "" like split-lines ;
116 : join-lines-as ( seq exemplar -- seq ) "\n" swap join-as ; inline
117 : join-lines ( seq -- seq ) "" join-lines-as ; inline
118 : split-words ( seq -- seq ) " " split ; inline
119 : join-words-as ( seq exemplar -- seq ) " " swap join-as ; inline
120 : join-words ( seq -- seq ) " " join-words-as ; inline