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factor: trim using lists
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1 ! Copyright (C) 2014 John Benediktsson
2 ! See http://factorcode.org/license.txt for BSD license
3
4 USING: arrays kernel math math.order math.private sequences
5 sequences.private strings vectors ;
6
7 IN: sorting.quick
8
9 <PRIVATE
10
11 :: quicksort ( seq from to quot: ( obj1 obj2 -- <=> ) -- )
12     from to < [
13         from to fixnum+fast 2/ seq nth-unsafe :> pivot
14
15         from to [ 2dup <= ] [
16             [
17                 over seq nth-unsafe pivot quot call
18                 +lt+ eq?
19             ] [ [ 1 fixnum+fast ] dip ] while
20
21             [
22                 dup seq nth-unsafe pivot quot call
23                 +gt+ eq?
24             ] [ 1 fixnum-fast ] while
25
26             2dup <= [
27                 [ seq exchange-unsafe ]
28                 [ [ 1 fixnum+fast ] [ 1 fixnum-fast ] bi* ] 2bi
29             ] when
30         ] while
31
32         [ seq from ] dip quot quicksort
33         [ seq ] dip to quot quicksort
34     ] when ; inline recursive
35
36 : check-array-capacity ( n -- n )
37     integer>fixnum-strict dup array-capacity?
38     [ "too large" throw ] unless ; inline
39
40 PRIVATE>
41
42 : sort! ( seq quot: ( obj1 obj2 -- <=> ) -- )
43     [ 0 over length check-array-capacity 1 - ] dip quicksort ; inline
44
45 : sort-with! ( seq quot: ( elt -- key ) -- )
46     [ compare ] curry sort! ; inline
47
48 : inv-sort-with! ( seq quot: ( elt -- key ) -- )
49     [ compare invert-comparison ] curry sort! ; inline
50
51 GENERIC: natural-sort! ( seq -- )
52
53 M: object natural-sort!  [ <=> ] sort! ;
54 M: array natural-sort! [ <=> ] sort! ;
55 M: vector natural-sort! [ <=> ] sort! ;
56 M: string natural-sort! [ <=> ] sort! ;