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vendor/ramsey/uuid/src/Provider/Node/StaticNodeProvider.php

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