mirror of
https://github.com/ramsey/uuid.git
synced 2026-06-20 16:57:36 +03:00
Ben Ramsey
68 lines
1.8 KiB
PHP
68 lines
1.8 KiB
PHP
<?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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use function is_int;
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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 `clock_seq_hi_and_reserved` field
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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 $clockSeqHi The value of `clock_seq_hi_and_reserved` field
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* before the RFC 4122 variant is applied
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*
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* @return int The high field of the clock sequence multiplexed with the variant
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*
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* @psalm-pure
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*/
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public static function applyVariant(int $clockSeqHi): int
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{
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// Set the variant to RFC 4122.
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$clockSeqHi = $clockSeqHi & 0x3f;
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$clockSeqHi |= 0x80;
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return $clockSeqHi;
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}
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/**
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* Applies the RFC 4122 version number to the `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 string $timeHi The value of the `time_hi_and_version` field before
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* 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 high field of the timestamp multiplexed with the version number
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*
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* @psalm-pure
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*/
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public static function applyVersion(string $timeHi, int $version): int
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{
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$timeHi = hexdec($timeHi) & 0x0fff;
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$timeHi |= $version << 12;
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assert(is_int($timeHi));
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return $timeHi;
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}
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}
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