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<?php
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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 <ben@benramsey.com>
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* @license http://opensource.org/licenses/MIT MIT
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*/
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declare(strict_types=1);
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namespace Ramsey\Uuid;
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/**
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* Provides binary math utilities
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*/
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class BinaryUtils
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{
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/**
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* Applies the RFC 4122 variant field to the 16-bit clock sequence
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*
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* @link http://tools.ietf.org/html/rfc4122#section-4.1.1 RFC 4122, § 4.1.1: Variant
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*
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* @param int $clockSeq The 16-bit clock sequence value before the RFC 4122
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* variant is applied
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*
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* @return int The 16-bit clock sequence multiplexed with the UUID variant
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*
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* @psalm-pure
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*/
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public static function applyVariant(int $clockSeq): int
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{
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$clockSeq = $clockSeq & 0x3fff;
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$clockSeq |= 0x8000;
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return $clockSeq;
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}
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/**
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* Applies the RFC 4122 version number to the 16-bit `time_hi_and_version` field
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*
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* @link http://tools.ietf.org/html/rfc4122#section-4.1.3 RFC 4122, § 4.1.3: Version
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*
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* @param int $timeHi The value of the 16-bit `time_hi_and_version` field
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* before the RFC 4122 version is applied
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* @param int $version The RFC 4122 version to apply to the `time_hi` field
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*
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* @return int The 16-bit time_hi field of the timestamp multiplexed with
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* the UUID version number
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*
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* @psalm-pure
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*/
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public static function applyVersion(int $timeHi, int $version): int
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{
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$timeHi = $timeHi & 0x0fff;
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$timeHi |= $version << 12;
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return $timeHi;
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}
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}
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