59 lines
1.8 KiB
PHP
59 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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* @link https://benramsey.com/projects/ramsey-uuid/ Documentation
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* @link https://packagist.org/packages/ramsey/uuid Packagist
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* @link https://github.com/ramsey/uuid GitHub
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*/
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namespace Ramsey\Uuid\Converter\Time;
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use Moontoast\Math\BigNumber;
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use Ramsey\Uuid\Converter\TimeConverterInterface;
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/**
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* BigNumberTimeConverter uses the moontoast/math library's `BigNumber` to
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* provide facilities for converting parts of time into representations that may
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* be used in UUIDs
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*/
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class BigNumberTimeConverter implements TimeConverterInterface
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{
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/**
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* Uses the provided seconds and micro-seconds to calculate the time_low,
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* time_mid, and time_high fields used by RFC 4122 version 1 UUIDs
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*
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* @param string $seconds
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* @param string $microSeconds
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* @return string[] An array containing `low`, `mid`, and `high` keys
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* @link http://tools.ietf.org/html/rfc4122#section-4.2.2
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*/
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public function calculateTime($seconds, $microSeconds)
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{
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$uuidTime = new BigNumber('0');
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$sec = new BigNumber($seconds);
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$sec->multiply('10000000');
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$usec = new BigNumber($microSeconds);
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$usec->multiply('10');
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$uuidTime->add($sec)
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->add($usec)
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->add('122192928000000000');
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$uuidTimeHex = sprintf('%016s', $uuidTime->convertToBase(16));
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return array(
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'low' => substr($uuidTimeHex, 8),
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'mid' => substr($uuidTimeHex, 4, 4),
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'hi' => substr($uuidTimeHex, 0, 4),
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);
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}
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}
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