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<?php |
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/** |
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* Class ByteArray |
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* |
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* @filesource ByteArray.php |
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* @created 05.12.2017 |
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* @package chillerlan\Traits\ArrayHelpers |
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* @author Smiley <[email protected]> |
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* @copyright 2017 Smiley |
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* @license MIT |
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*/ |
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namespace chillerlan\Traits\ArrayHelpers; |
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use ReflectionClass, SplFixedArray; |
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/** |
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* @extends \SplFixedArray |
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*/ |
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class ByteArray extends SplFixedArray{ |
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/** |
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* @return string |
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*/ |
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public function toString():string{ |
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return $this->map('chr'); |
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} |
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/** |
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* @return string |
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*/ |
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public function toHex():string{ |
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return $this->map(function($v){ |
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return \str_pad(\dechex($v), '2', '0', \STR_PAD_LEFT); |
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}); |
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} |
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/** |
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* @return string |
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*/ |
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public function toJSON():string{ |
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return \json_encode($this->toArray()); |
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} |
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/** |
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* @return string |
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*/ |
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public function toBase64():string{ |
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return \base64_encode($this->toString()); |
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} |
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/** |
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* @return string |
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*/ |
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public function toBin():string{ |
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return $this->map(function($v){ |
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return \str_pad(\decbin($v), '8', '0', \STR_PAD_LEFT); |
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}); |
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} |
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/** |
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* @param callable $m |
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* |
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* @return string |
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*/ |
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public function map(callable $m):string{ |
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return \implode('', \array_map($m, $this->toArray())); |
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} |
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/** |
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* @param \SplFixedArray $src |
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* @param int $length |
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* @param int|null $offset |
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* @param int|null $srcOffset |
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* |
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* @return \chillerlan\Traits\ArrayHelpers\ByteArray |
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*/ |
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public function copyFrom(SplFixedArray $src, int $length = null, int $offset = null, int $srcOffset = null):ByteArray{ |
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$length = $length ?? $src->count(); |
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$offset = $offset ?? $length; |
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$srcOffset = $srcOffset ?? 0; |
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$diff = $offset + $length; |
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if($diff > $this->count()){ |
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$this->setSize($diff); |
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} |
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for($i = 0; $i < $length; $i++){ |
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$this[$i + $offset] = $src[$i + $srcOffset]; |
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} |
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return $this; |
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} |
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/** |
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* @param int $offset |
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* @param int|null $length |
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* |
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* @return \chillerlan\Traits\ArrayHelpers\ByteArray |
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*/ |
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public function slice(int $offset, int $length = null):ByteArray{ |
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// keep an extended class |
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/** @var \chillerlan\Traits\ArrayHelpers\ByteArray $slice */ |
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$slice = (new ReflectionClass($this))->newInstanceArgs([$length ?? ($this->count() - $offset)]); |
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foreach($slice as $i => $_){ |
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$slice[$i] = $this[$offset + $i]; |
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} |
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return $slice; |
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} |
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/** |
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* @param \SplFixedArray $array |
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* |
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* @return bool |
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*/ |
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public function equal(SplFixedArray $array):bool{ |
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if($this->count() !== $array->count()){ |
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return false; |
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} |
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$diff = 0; |
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foreach($this as $k => $v){ |
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$diff |= $v ^ $array[$k]; |
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} |
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$diff = ($diff - 1) >> 31; |
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return ($diff & 1) === 1; |
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} |
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} |
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chillerlan /
php-traits
