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