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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 | * CycleSort 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 CycleSort 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 $list; |
46 | } |
47 | |
48 | for ($start = 0; $start < $n - 1; ++$start) { |
49 | $item = $list[$start]; |
50 | |
51 | $pos = $start; |
52 | $length0 = \count($list); |
53 | for ($i = $start + 1; $i < $length0; ++$i) { |
54 | if (!$list[$i]->compare($item, $order)) { |
55 | ++$pos; |
56 | } |
57 | } |
58 | |
59 | if ($pos === $start) { |
60 | continue; |
61 | } |
62 | |
63 | while ($item->equals($list[$pos])) { |
64 | ++$pos; |
65 | } |
66 | |
67 | if ($pos !== $start) { |
68 | $old = $list[$pos]; |
69 | $list[$pos] = $item; |
70 | $item = $old; |
71 | } |
72 | |
73 | while ($pos !== $start) { |
74 | $pos = $start; |
75 | |
76 | for ($i = $start + 1; $i < $n; ++$i) { |
77 | if (!$list[$i]->compare($item, $order)) { |
78 | ++$pos; |
79 | } |
80 | } |
81 | |
82 | while (isset($list[$pos]) && $item->equals($list[$pos])) { |
83 | ++$pos; |
84 | } |
85 | |
86 | if (isset($list[$pos])) { |
87 | $old = $list[$pos]; |
88 | $list[$pos] = $item; |
89 | $item = $old; |
90 | } |
91 | } |
92 | } |
93 | |
94 | return $list; |
95 | } |
96 | } |