--- /dev/null
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\VarDumper\Cloner;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class VarCloner extends AbstractCloner
+{
+ private static $hashMask = 0;
+ private static $hashOffset = 0;
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function doClone($var)
+ {
+ $useExt = $this->useExt;
+ $len = 1; // Length of $queue
+ $pos = 0; // Number of cloned items past the first level
+ $refsCounter = 0; // Hard references counter
+ $queue = array(array($var)); // This breadth-first queue is the return value
+ $arrayRefs = array(); // Map of queue indexes to stub array objects
+ $hardRefs = array(); // Map of original zval hashes to stub objects
+ $objRefs = array(); // Map of original object handles to their stub object couterpart
+ $resRefs = array(); // Map of original resource handles to their stub object couterpart
+ $values = array(); // Map of stub objects' hashes to original values
+ $maxItems = $this->maxItems;
+ $maxString = $this->maxString;
+ $cookie = (object) array(); // Unique object used to detect hard references
+ $gid = uniqid(mt_rand(), true); // Unique string used to detect the special $GLOBALS variable
+ $a = null; // Array cast for nested structures
+ $stub = null; // Stub capturing the main properties of an original item value
+ // or null if the original value is used directly
+ $zval = array( // Main properties of the current value
+ 'type' => null,
+ 'zval_isref' => null,
+ 'zval_hash' => null,
+ 'array_count' => null,
+ 'object_class' => null,
+ 'object_handle' => null,
+ 'resource_type' => null,
+ );
+ if (!self::$hashMask) {
+ self::initHashMask();
+ }
+ $hashMask = self::$hashMask;
+ $hashOffset = self::$hashOffset;
+
+ for ($i = 0; $i < $len; ++$i) {
+ $indexed = true; // Whether the currently iterated array is numerically indexed or not
+ $j = -1; // Position in the currently iterated array
+ $fromObjCast = array_keys($queue[$i]);
+ $fromObjCast = array_keys(array_flip($fromObjCast)) !== $fromObjCast;
+ $refs = $vals = $fromObjCast ? array_values($queue[$i]) : $queue[$i];
+ foreach ($queue[$i] as $k => $v) {
+ // $k is the original key
+ // $v is the original value or a stub object in case of hard references
+ if ($k !== ++$j) {
+ $indexed = false;
+ }
+ if ($fromObjCast) {
+ $k = $j;
+ }
+ if ($useExt) {
+ $zval = symfony_zval_info($k, $refs);
+ } else {
+ $refs[$k] = $cookie;
+ if ($zval['zval_isref'] = $vals[$k] === $cookie) {
+ $zval['zval_hash'] = $v instanceof Stub ? spl_object_hash($v) : null;
+ }
+ $zval['type'] = gettype($v);
+ }
+ if ($zval['zval_isref']) {
+ $vals[$k] = &$stub; // Break hard references to make $queue completely
+ unset($stub); // independent from the original structure
+ if (isset($hardRefs[$zval['zval_hash']])) {
+ $vals[$k] = $useExt ? ($v = $hardRefs[$zval['zval_hash']]) : ($refs[$k] = $v);
+ if ($v->value instanceof Stub && (Stub::TYPE_OBJECT === $v->value->type || Stub::TYPE_RESOURCE === $v->value->type)) {
+ ++$v->value->refCount;
+ }
+ ++$v->refCount;
+ continue;
+ }
+ }
+ // Create $stub when the original value $v can not be used directly
+ // If $v is a nested structure, put that structure in array $a
+ switch ($zval['type']) {
+ case 'string':
+ if (isset($v[0]) && !preg_match('//u', $v)) {
+ $stub = new Stub();
+ $stub->type = Stub::TYPE_STRING;
+ $stub->class = Stub::STRING_BINARY;
+ if (0 <= $maxString && 0 < $cut = strlen($v) - $maxString) {
+ $stub->cut = $cut;
+ $stub->value = substr($v, 0, -$cut);
+ } else {
+ $stub->value = $v;
+ }
+ } elseif (0 <= $maxString && isset($v[1 + ($maxString >> 2)]) && 0 < $cut = mb_strlen($v, 'UTF-8') - $maxString) {
+ $stub = new Stub();
+ $stub->type = Stub::TYPE_STRING;
+ $stub->class = Stub::STRING_UTF8;
+ $stub->cut = $cut;
+ $stub->value = mb_substr($v, 0, $maxString, 'UTF-8');
+ }
+ break;
+
+ case 'integer':
+ break;
+
+ case 'array':
+ if ($v) {
+ $stub = $arrayRefs[$len] = new Stub();
+ $stub->type = Stub::TYPE_ARRAY;
+ $stub->class = Stub::ARRAY_ASSOC;
+
+ // Copies of $GLOBALS have very strange behavior,
+ // let's detect them with some black magic
+ $a = $v;
+ $a[$gid] = true;
+
+ // Happens with copies of $GLOBALS
+ if (isset($v[$gid])) {
+ unset($v[$gid]);
+ $a = array();
+ foreach ($v as $gk => &$gv) {
+ $a[$gk] = &$gv;
+ }
+ } else {
+ $a = $v;
+ }
+
+ $stub->value = $zval['array_count'] ?: count($a);
+ }
+ break;
+
+ case 'object':
+ if (empty($objRefs[$h = $zval['object_handle'] ?: ($hashMask ^ hexdec(substr(spl_object_hash($v), $hashOffset, PHP_INT_SIZE)))])) {
+ $stub = new Stub();
+ $stub->type = Stub::TYPE_OBJECT;
+ $stub->class = $zval['object_class'] ?: get_class($v);
+ $stub->value = $v;
+ $stub->handle = $h;
+ $a = $this->castObject($stub, 0 < $i);
+ if ($v !== $stub->value) {
+ if (Stub::TYPE_OBJECT !== $stub->type || null === $stub->value) {
+ break;
+ }
+ if ($useExt) {
+ $zval['type'] = $stub->value;
+ $zval = symfony_zval_info('type', $zval);
+ $h = $zval['object_handle'];
+ } else {
+ $h = $hashMask ^ hexdec(substr(spl_object_hash($stub->value), $hashOffset, PHP_INT_SIZE));
+ }
+ $stub->handle = $h;
+ }
+ $stub->value = null;
+ if (0 <= $maxItems && $maxItems <= $pos) {
+ $stub->cut = count($a);
+ $a = null;
+ }
+ }
+ if (empty($objRefs[$h])) {
+ $objRefs[$h] = $stub;
+ } else {
+ $stub = $objRefs[$h];
+ ++$stub->refCount;
+ $a = null;
+ }
+ break;
+
+ case 'resource':
+ case 'unknown type':
+ case 'resource (closed)':
+ if (empty($resRefs[$h = (int) $v])) {
+ $stub = new Stub();
+ $stub->type = Stub::TYPE_RESOURCE;
+ if ('Unknown' === $stub->class = $zval['resource_type'] ?: @get_resource_type($v)) {
+ $stub->class = 'Closed';
+ }
+ $stub->value = $v;
+ $stub->handle = $h;
+ $a = $this->castResource($stub, 0 < $i);
+ $stub->value = null;
+ if (0 <= $maxItems && $maxItems <= $pos) {
+ $stub->cut = count($a);
+ $a = null;
+ }
+ }
+ if (empty($resRefs[$h])) {
+ $resRefs[$h] = $stub;
+ } else {
+ $stub = $resRefs[$h];
+ ++$stub->refCount;
+ $a = null;
+ }
+ break;
+ }
+
+ if (isset($stub)) {
+ if ($zval['zval_isref']) {
+ if ($useExt) {
+ $vals[$k] = $hardRefs[$zval['zval_hash']] = $v = new Stub();
+ $v->value = $stub;
+ } else {
+ $refs[$k] = new Stub();
+ $refs[$k]->value = $stub;
+ $h = spl_object_hash($refs[$k]);
+ $vals[$k] = $hardRefs[$h] = &$refs[$k];
+ $values[$h] = $v;
+ }
+ $vals[$k]->handle = ++$refsCounter;
+ } else {
+ $vals[$k] = $stub;
+ }
+
+ if ($a) {
+ if ($i && 0 <= $maxItems) {
+ $k = count($a);
+ if ($pos < $maxItems) {
+ if ($maxItems < $pos += $k) {
+ $a = array_slice($a, 0, $maxItems - $pos);
+ if ($stub->cut >= 0) {
+ $stub->cut += $pos - $maxItems;
+ }
+ }
+ } else {
+ if ($stub->cut >= 0) {
+ $stub->cut += $k;
+ }
+ $stub = $a = null;
+ unset($arrayRefs[$len]);
+ continue;
+ }
+ }
+ $queue[$len] = $a;
+ $stub->position = $len++;
+ }
+ $stub = $a = null;
+ } elseif ($zval['zval_isref']) {
+ if ($useExt) {
+ $vals[$k] = $hardRefs[$zval['zval_hash']] = new Stub();
+ $vals[$k]->value = $v;
+ } else {
+ $refs[$k] = $vals[$k] = new Stub();
+ $refs[$k]->value = $v;
+ $h = spl_object_hash($refs[$k]);
+ $hardRefs[$h] = &$refs[$k];
+ $values[$h] = $v;
+ }
+ $vals[$k]->handle = ++$refsCounter;
+ }
+ }
+
+ if ($fromObjCast) {
+ $refs = $vals;
+ $vals = array();
+ $j = -1;
+ foreach ($queue[$i] as $k => $v) {
+ foreach (array($k => $v) as $a => $v) {
+ }
+ if ($a !== $k) {
+ $vals = (object) $vals;
+ $vals->{$k} = $refs[++$j];
+ $vals = (array) $vals;
+ } else {
+ $vals[$k] = $refs[++$j];
+ }
+ }
+ }
+
+ $queue[$i] = $vals;
+
+ if (isset($arrayRefs[$i])) {
+ if ($indexed) {
+ $arrayRefs[$i]->class = Stub::ARRAY_INDEXED;
+ }
+ unset($arrayRefs[$i]);
+ }
+ }
+
+ foreach ($values as $h => $v) {
+ $hardRefs[$h] = $v;
+ }
+
+ return $queue;
+ }
+
+ private static function initHashMask()
+ {
+ $obj = (object) array();
+ self::$hashOffset = 16 - PHP_INT_SIZE;
+ self::$hashMask = -1;
+
+ if (defined('HHVM_VERSION')) {
+ self::$hashOffset += 16;
+ } else {
+ // check if we are nested in an output buffering handler to prevent a fatal error with ob_start() below
+ $obFuncs = array('ob_clean', 'ob_end_clean', 'ob_flush', 'ob_end_flush', 'ob_get_contents', 'ob_get_flush');
+ foreach (debug_backtrace(PHP_VERSION_ID >= 50400 ? DEBUG_BACKTRACE_IGNORE_ARGS : false) as $frame) {
+ if (isset($frame['function'][0]) && !isset($frame['class']) && 'o' === $frame['function'][0] && in_array($frame['function'], $obFuncs)) {
+ $frame['line'] = 0;
+ break;
+ }
+ }
+ if (!empty($frame['line'])) {
+ ob_start();
+ debug_zval_dump($obj);
+ self::$hashMask = (int) substr(ob_get_clean(), 17);
+ }
+ }
+
+ self::$hashMask ^= hexdec(substr(spl_object_hash($obj), self::$hashOffset, PHP_INT_SIZE));
+ }
+}
projects / yaffs-website / blobdiff