Code Coverage |
||||||||||
Lines |
Functions and Methods |
Classes and Traits |
||||||||
Total | |
100.00% |
22 / 22 |
|
100.00% |
3 / 3 |
CRAP | |
100.00% |
1 / 1 |
QuickSort | |
100.00% |
22 / 22 |
|
100.00% |
3 / 3 |
8 | |
100.00% |
1 / 1 |
__construct | n/a |
0 / 0 |
n/a |
0 / 0 |
1 | |||||
sort | |
100.00% |
6 / 6 |
|
100.00% |
1 / 1 |
2 | |||
qsort | |
100.00% |
4 / 4 |
|
100.00% |
1 / 1 |
2 | |||
partition | |
100.00% |
12 / 12 |
|
100.00% |
1 / 1 |
3 |
1 | <?php |
2 | /** |
3 | * Jingga |
4 | * |
5 | * PHP Version 8.1 |
6 | * |
7 | * @package phpOMS\Algorithm\Sort; |
8 | * @copyright Dennis Eichhorn |
9 | * @license OMS License 2.0 |
10 | * @version 1.0.0 |
11 | * @link https://jingga.app |
12 | */ |
13 | declare(strict_types=1); |
14 | |
15 | namespace phpOMS\Algorithm\Sort; |
16 | |
17 | /** |
18 | * QuickSort class. |
19 | * |
20 | * @package phpOMS\Algorithm\Sort; |
21 | * @license OMS License 2.0 |
22 | * @link https://jingga.app |
23 | * @since 1.0.0 |
24 | */ |
25 | final class QuickSort implements SortInterface |
26 | { |
27 | /** |
28 | * Constructor |
29 | * |
30 | * @since 1.0.0 |
31 | * @codeCoverageIgnore |
32 | */ |
33 | private function __construct() |
34 | { |
35 | } |
36 | |
37 | /** |
38 | * {@inheritdoc} |
39 | */ |
40 | public static function sort(array $list, int $order = SortOrder::ASC) : array |
41 | { |
42 | $n = \count($list); |
43 | |
44 | if ($n < 2) { |
45 | return $list; |
46 | } |
47 | |
48 | $copy = $list; |
49 | self::qsort($copy, 0, $n - 1, $order); |
50 | |
51 | return $copy; |
52 | } |
53 | |
54 | /** |
55 | * Recursive quick sort |
56 | * |
57 | * @param array $list Data to sort |
58 | * @param int $lo Low or left point to sort |
59 | * @param int $hi High or right point to sort |
60 | * @param int $order Sort order |
61 | * |
62 | * @return void |
63 | * |
64 | * @since 1.0.0 |
65 | */ |
66 | private static function qsort(array &$list, int $lo, int $hi, int $order) : void |
67 | { |
68 | if ($lo < $hi) { |
69 | $i = self::partition($list, $lo, $hi, $order); |
70 | self::qsort($list, $lo, $i - 1, $order); |
71 | self::qsort($list, $i + 1, $hi, $order); |
72 | } |
73 | } |
74 | |
75 | /** |
76 | * Partition data and count the partitions |
77 | * |
78 | * @param array $list Data to sort |
79 | * @param int $lo Low or left point to sort |
80 | * @param int $hi High or right point to sort |
81 | * @param int $order Sort order |
82 | * |
83 | * @return int |
84 | * |
85 | * @since 1.0.0 |
86 | */ |
87 | private static function partition(array &$list, int $lo, int $hi, int $order) : int |
88 | { |
89 | $pivot = $list[$hi]; |
90 | $i = $lo - 1; |
91 | |
92 | for ($j = $lo; $j <= $hi - 1; ++$j) { |
93 | if (!$list[$j]->compare($pivot, $order)) { |
94 | ++$i; |
95 | $old = $list[$i]; |
96 | $list[$i] = $list[$j]; |
97 | $list[$j] = $old; |
98 | } |
99 | } |
100 | |
101 | $old = $list[$i + 1]; |
102 | $list[$i + 1] = $list[$hi]; |
103 | $list[$hi] = $old; |
104 | |
105 | return $i + 1; |
106 | } |
107 | } |