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<?php |
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/** |
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* This file is part of the sj-i/php-profiler package. |
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* |
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* (c) sji <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace PhpProfiler\Lib\PhpInternals\Types\Zend; |
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use FFI\PhpInternals\zend_array; |
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use FFI\PhpInternals\zend_hash_func_ffi; |
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use PhpProfiler\Lib\PhpInternals\CastedCData; |
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use PhpProfiler\Lib\PhpInternals\Types\C\RawInt32; |
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use PhpProfiler\Lib\Process\Pointer\Dereferencable; |
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use PhpProfiler\Lib\Process\Pointer\Dereferencer; |
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use PhpProfiler\Lib\Process\Pointer\Pointer; |
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/** |
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* struct _zend_array { |
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* zend_refcounted_h gc; |
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* union { |
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* struct { |
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* zend_uchar flags; |
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* zend_uchar _unused; |
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* zend_uchar nIteratorsCount; |
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* zend_uchar _unused2; |
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* } v; |
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* uint32_t flags; |
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* } u; |
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* uint32_t nTableMask; |
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* Bucket *arData; |
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* uint32_t nNumUsed; |
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* uint32_t nNumOfElements; |
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* uint32_t nTableSize; |
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* uint32_t nInternalPointer; |
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* zend_long nNextFreeElement; |
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* dtor_func_t pDestructor; |
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* }; */ |
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final class ZendArray implements Dereferencable |
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{ |
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/** @psalm-suppress PropertyNotSetInConstructor */ |
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public int $flags; |
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/** @psalm-suppress PropertyNotSetInConstructor */ |
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public int $nTableMask; |
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/** |
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* @psalm-suppress PropertyNotSetInConstructor |
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* @var Pointer<Bucket> |
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*/ |
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public Pointer $arData; |
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/** @psalm-suppress PropertyNotSetInConstructor */ |
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public int $nNumUsed; |
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/** @psalm-suppress PropertyNotSetInConstructor */ |
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public int $nNumOfElements; |
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/** @psalm-suppress PropertyNotSetInConstructor */ |
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public int $nTableSize; |
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/** @psalm-suppress PropertyNotSetInConstructor */ |
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public int $nInternalPointer; |
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/** @psalm-suppress PropertyNotSetInConstructor */ |
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public int $nNextFreeElement; |
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/** @param CastedCData<zend_array> $casted_cdata */ |
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public function __construct( |
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private CastedCData $casted_cdata |
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) { |
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unset($this->flags); |
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unset($this->nTableMask); |
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unset($this->arData); |
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unset($this->nNumUsed); |
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unset($this->nNumOfElements); |
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unset($this->nTableSize); |
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unset($this->nInternalPointer); |
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unset($this->nNextFreeElement); |
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} |
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public function __get(string $field_name): mixed |
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{ |
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return match ($field_name) { |
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'flags' => $this->flags = $this->casted_cdata->casted->u->flags, |
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'nTableMask' => $this->nTableMask = $this->casted_cdata->casted->nTableMask, |
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'arData' => $this->arData = Pointer::fromCData( |
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Bucket::class, |
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$this->casted_cdata->casted->arData, |
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), |
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'nNumUsed' => $this->nNumUsed = $this->casted_cdata->casted->nNumUsed, |
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'nNumOfElements' => $this->nNumOfElements = $this->casted_cdata->casted->nNumOfElements, |
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'nTableSize' => $this->nTableSize = $this->casted_cdata->casted->nTableSize, |
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'nInternalPointer' => $this->nInternalPointer = $this->casted_cdata->casted->nInternalPointer, |
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'nNextFreeElement' => $this->nNextFreeElement = $this->casted_cdata->casted->nNextFreeElement, |
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}; |
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} |
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public function findByKey( |
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Dereferencer $dereferencer, |
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string $key, |
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int $hash = null |
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): ?Bucket { |
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$hash ??= $this->calculateHash($key); |
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$hash_index = $hash | $this->nTableMask; |
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$hash_index = $hash_index & 0xFFFF_FFFF; |
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if ($hash_index & 0x8000_0000) { |
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$hash_index = $hash_index & ~0x8000_0000; |
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$hash_index = -2147483648 + $hash_index; |
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} |
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$idx = $dereferencer->deref( |
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$this->calculateIndex($hash_index, $this->arData) |
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)->value; |
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while ($idx !== -1) { |
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/** @var Bucket $bucket */ |
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$bucket = $dereferencer->deref( |
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$this->arData->indexedAt($idx) |
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); |
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if ($bucket->h === $hash) { |
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$bucket_key_zstring = $dereferencer->deref($bucket->key)->getValuePointer($bucket->key); |
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$bucket_key = (string)$dereferencer->deref($bucket_key_zstring); |
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if ($bucket_key === $key) { |
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return $bucket; |
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} |
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} |
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$idx = $bucket->val->u2->next; |
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} |
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return null; |
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} |
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/** |
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* @param Pointer<Bucket> $pointer |
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* @return Pointer<RawInt32> |
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*/ |
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private function calculateIndex(int $index, Pointer $pointer): Pointer |
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{ |
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return new Pointer( |
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RawInt32::class, |
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$pointer->address + $index * 4, |
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4, |
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); |
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} |
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private function calculateHash(string $key): int |
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{ |
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static $ffi = null; |
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/** @var ?zend_hash_func_ffi $ffi */ |
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$ffi ??= \FFI::cdef('int zend_hash_func(const char *str, int len);'); |
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assert(!is_null($ffi)); |
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return $ffi->zend_hash_func($key, strlen($key)); |
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} |
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public static function getCTypeName(): string |
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{ |
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return 'zend_array'; |
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} |
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public static function fromCastedCData(CastedCData $casted_cdata, Pointer $pointer): static |
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{ |
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/** @var CastedCData<zend_array> $casted_cdata */ |
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return new self($casted_cdata); |
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} |
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} |
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sj-i /
php-profiler
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