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<?php |
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|
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/** |
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* This file is part of the ramsey/uuid library |
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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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* @copyright Copyright (c) Ben Ramsey <[email protected]> |
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* @license http://opensource.org/licenses/MIT MIT |
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*/ |
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|
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declare(strict_types=1); |
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|
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namespace Ramsey\Uuid\Provider\Node; |
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|
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use Ramsey\Uuid\Exception\InvalidArgumentException; |
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use Ramsey\Uuid\Provider\NodeProviderInterface; |
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use Ramsey\Uuid\Type\Hexadecimal; |
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|
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use function dechex; |
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use function hexdec; |
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use function str_pad; |
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use function substr; |
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|
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use const STR_PAD_LEFT; |
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|
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/** |
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* StaticNodeProvider provides a static node value with the multicast bit set |
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* |
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* @link http://tools.ietf.org/html/rfc4122#section-4.5 RFC 4122, § 4.5: Node IDs that Do Not Identify the Host |
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*/ |
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class StaticNodeProvider implements NodeProviderInterface |
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{ |
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/** |
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* @var Hexadecimal |
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*/ |
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private $node; |
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|
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/** |
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* @param Hexadecimal $node The static node value to use |
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*/ |
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public function __construct(Hexadecimal $node) |
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{ |
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if (strlen($node->toString()) > 12) { |
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throw new InvalidArgumentException( |
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'Static node value cannot be greater than 12 hexadecimal characters' |
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); |
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} |
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|
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$this->node = $this->setMulticastBit($node); |
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} |
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|
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public function getNode(): Hexadecimal |
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{ |
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return $this->node; |
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} |
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|
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/** |
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* Set the multicast bit for the static node value |
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*/ |
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private function setMulticastBit(Hexadecimal $node): Hexadecimal |
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{ |
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$nodeHex = str_pad($node->toString(), 12, '0', STR_PAD_LEFT); |
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$firstOctet = substr($nodeHex, 0, 2); |
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|
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$firstOctet = str_pad( |
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dechex(hexdec($firstOctet) | 0x01), |
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2, |
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'0', |
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STR_PAD_LEFT |
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); |
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|
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return new Hexadecimal($firstOctet . substr($nodeHex, 2)); |
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} |
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} |
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|
