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| 1 | +<?php |
| 2 | + |
| 3 | +/* |
| 4 | + * This file is part of the Symfony package. |
| 5 | + * |
| 6 | + * (c) Fabien Potencier <fabien@symfony.com> |
| 7 | + * |
| 8 | + * For the full copyright and license information, please view the LICENSE |
| 9 | + * file that was distributed with this source code. |
| 10 | + */ |
| 11 | + |
| 12 | +namespace Symfony\Component\VarDumper\Cloner; |
| 13 | + |
| 14 | +/** |
| 15 | + * @author Nicolas Grekas <p@tchwork.com> |
| 16 | + */ |
| 17 | +class ExtCloner extends AbstractCloner |
| 18 | +{ |
| 19 | + /** |
| 20 | + * {@inheritdoc} |
| 21 | + */ |
| 22 | + protected function doClone($var) |
| 23 | + { |
| 24 | + $i = 0; // Current iteration position in $queue |
| 25 | + $len = 1; // Length of $queue |
| 26 | + $pos = 0; // Number of cloned items past the first level |
| 27 | + $refs = 0; // Number of hard+soft references in $var |
| 28 | + $queue = array(array($var)); // This breadth-first queue is the return value |
| 29 | + $arrayRefs = array(); // Map of queue indexes to stub array objects |
| 30 | + $hardRefs = array(); // Map of original zval hashes to stub objects |
| 31 | + $softRefs = array(); // Map of original object hashes to their stub object couterpart |
| 32 | + $maxItems = $this->maxItems; |
| 33 | + $maxString = $this->maxString; |
| 34 | + $a = null; // Array cast for nested structures |
| 35 | + $stub = null; // stdClass capturing the main properties of an original item value, |
| 36 | + // or null if the original value is used directly |
| 37 | + |
| 38 | + for ($i = 0; $i < $len; ++$i) { |
| 39 | + $indexed = true; // Whether the currently iterated array is numerically indexed or not |
| 40 | + $j = -1; // Position in the currently iterated array |
| 41 | + $step = $queue[$i]; // Copy of the currently iterated array used for hard references detection |
| 42 | + foreach ($step as $k => $v) { |
| 43 | + // $k is the original key |
| 44 | + // $v is the original value or a stub object in case of hard references |
| 45 | + if ($indexed && $k !== ++$j) { |
| 46 | + $indexed = false; |
| 47 | + } |
| 48 | + $zval = symfony_zval_info($k, $step); |
| 49 | + if ($zval['zval_isref']) { |
| 50 | + $queue[$i][$k] =& $stub; // Break hard references to make $queue completely |
| 51 | + unset($stub); // independent from the original structure |
| 52 | + if (isset($hardRefs[$h = $zval['zval_hash']])) { |
| 53 | + $hardRefs[$h]->ref = ++$refs; |
| 54 | + $queue[$i][$k] = $hardRefs[$h]; |
| 55 | + continue; |
| 56 | + } |
| 57 | + } |
| 58 | + // Create $stub when the original value $v can not be used directly |
| 59 | + // If $v is a nested structure, put that structure in array $a |
| 60 | + switch ($zval['type']) { |
| 61 | + case 'string': |
| 62 | + if (isset($v[0]) && !preg_match('//u', $v)) { |
| 63 | + if (0 <= $maxString && 0 < $cut = strlen($v) - $maxString) { |
| 64 | + $stub = substr_replace($v, '', -$cut); |
| 65 | + $stub = (object) array('cut' => $cut, 'bin' => Data::utf8Encode($stub)); |
| 66 | + } else { |
| 67 | + $stub = (object) array('bin' => Data::utf8Encode($v)); |
| 68 | + } |
| 69 | + } elseif (0 <= $maxString && isset($v[1+($maxString>>2)]) && 0 < $cut = iconv_strlen($v, 'UTF-8') - $maxString) { |
| 70 | + $stub = iconv_substr($v, 0, $maxString, 'UTF-8'); |
| 71 | + $stub = (object) array('cut' => $cut, 'str' => $stub); |
| 72 | + } |
| 73 | + break; |
| 74 | + |
| 75 | + case 'integer': |
| 76 | + break; |
| 77 | + |
| 78 | + case 'array': |
| 79 | + if ($v) { |
| 80 | + $stub = (object) array('count' => $zval['array_count']); |
| 81 | + $arrayRefs[$len] = $stub; |
| 82 | + $a = $v; |
| 83 | + } |
| 84 | + break; |
| 85 | + |
| 86 | + case 'object': |
| 87 | + if (empty($softRefs[$h = $zval['object_hash']])) { |
| 88 | + $stub = $softRefs[$h] = (object) array('class' => $zval['object_class']); |
| 89 | + if (0 > $maxItems || $pos < $maxItems) { |
| 90 | + $a = $this->castObject($stub->class, $v, 0 < $i, $cut); |
| 91 | + if ($cut) { |
| 92 | + $stub->cut = $cut; |
| 93 | + } |
| 94 | + } else { |
| 95 | + $stub->cut = -1; |
| 96 | + } |
| 97 | + } else { |
| 98 | + $stub = $softRefs[$h]; |
| 99 | + $stub->ref = ++$refs; |
| 100 | + } |
| 101 | + break; |
| 102 | + |
| 103 | + case 'resource': |
| 104 | + if (empty($softRefs[$h = $zval['resource_id']])) { |
| 105 | + $stub = $softRefs[$h] = (object) array('res' => $zval['resource_type']); |
| 106 | + if (0 > $maxItems || $pos < $maxItems) { |
| 107 | + $a = $this->castResource($stub->res, $v, 0 < $i); |
| 108 | + } else { |
| 109 | + $stub->cut = -1; |
| 110 | + } |
| 111 | + } else { |
| 112 | + $stub = $softRefs[$h]; |
| 113 | + $stub->ref = ++$refs; |
| 114 | + } |
| 115 | + break; |
| 116 | + } |
| 117 | + |
| 118 | + if (isset($stub)) { |
| 119 | + if ($zval['zval_isref']) { |
| 120 | + if (isset($stub->count)) { |
| 121 | + $queue[$i][$k] = $hardRefs[$zval['zval_hash']] = $stub; |
| 122 | + } else { |
| 123 | + $queue[$i][$k] = $hardRefs[$zval['zval_hash']] = (object) array('val' => $stub); |
| 124 | + } |
| 125 | + } else { |
| 126 | + $queue[$i][$k] = $stub; |
| 127 | + } |
| 128 | + |
| 129 | + if ($a) { |
| 130 | + if ($i && 0 <= $maxItems) { |
| 131 | + $k = count($a); |
| 132 | + if ($pos < $maxItems) { |
| 133 | + if ($maxItems < $pos += $k) { |
| 134 | + $a = array_slice($a, 0, $maxItems - $pos); |
| 135 | + if (empty($stub->cut)) { |
| 136 | + $stub->cut = $pos - $maxItems; |
| 137 | + } elseif ($stub->cut > 0) { |
| 138 | + $stub->cut += $pos - $maxItems; |
| 139 | + } |
| 140 | + } |
| 141 | + } else { |
| 142 | + if (empty($stub->cut)) { |
| 143 | + $stub->cut = $k; |
| 144 | + } elseif ($stub->cut > 0) { |
| 145 | + $stub->cut += $k; |
| 146 | + } |
| 147 | + $stub = $a = null; |
| 148 | + unset($arrayRefs[$len]); |
| 149 | + continue; |
| 150 | + } |
| 151 | + } |
| 152 | + $queue[$len] = $a; |
| 153 | + $stub->pos = $len++; |
| 154 | + } |
| 155 | + $stub = $a = null; |
| 156 | + } elseif ($zval['zval_isref']) { |
| 157 | + $queue[$i][$k] = $hardRefs[$zval['zval_hash']] = (object) array('val' => $v); |
| 158 | + } |
| 159 | + } |
| 160 | + |
| 161 | + if (isset($arrayRefs[$i])) { |
| 162 | + if ($indexed) { |
| 163 | + $arrayRefs[$i]->indexed = 1; |
| 164 | + } |
| 165 | + unset($arrayRefs[$i]); |
| 166 | + } |
| 167 | + } |
| 168 | + |
| 169 | + return $queue; |
| 170 | + } |
| 171 | +} |
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