<?php
namespace Ramsey\Uuid;
/**
* Provides binary math utilities
*/
class BinaryUtils
{
/**
* Applies the RFC 4122 variant field to the `clock_seq_hi_and_reserved` field
*
* @param $clockSeqHi
* @return int The high field of the clock sequence multiplexed with the variant
* @link http://tools.ietf.org/html/rfc4122#section-4.1.1
*/
public static function applyVariant($clockSeqHi)
{
// Set the variant to RFC 4122
$clockSeqHi = $clockSeqHi & 0x3f;
$clockSeqHi &= ~(0xc0);
$clockSeqHi |= 0x80;
return $clockSeqHi;
}
/**
* Applies the RFC 4122 version number to the `time_hi_and_version` field
*
* @param string $timeHi
* @param integer $version
* @return int The high field of the timestamp multiplexed with the version number
* @link http://tools.ietf.org/html/rfc4122#section-4.1.3
*/
public static function applyVersion($timeHi, $version)
{
$timeHi = hexdec($timeHi) & 0x0fff;
$timeHi &= ~(0xf000);
$timeHi |= $version << 12;
return $timeHi;
}
}
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