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?? Editing: BigNumberTimeConverter.php

<?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
 * @link https://benramsey.com/projects/ramsey-uuid/ Documentation
 * @link https://packagist.org/packages/ramsey/uuid Packagist
 * @link https://github.com/ramsey/uuid GitHub
 */

namespace Ramsey\Uuid\Converter\Time;

use Moontoast\Math\BigNumber;
use Ramsey\Uuid\Converter\TimeConverterInterface;

/**
 * BigNumberTimeConverter uses the moontoast/math library's `BigNumber` to
 * provide facilities for converting parts of time into representations that may
 * be used in UUIDs
 */
class BigNumberTimeConverter implements TimeConverterInterface
{
    /**
     * Uses the provided seconds and micro-seconds to calculate the time_low,
     * time_mid, and time_high fields used by RFC 4122 version 1 UUIDs
     *
     * @param string $seconds
     * @param string $microSeconds
     * @return string[] An array containing `low`, `mid`, and `high` keys
     * @link http://tools.ietf.org/html/rfc4122#section-4.2.2
     */
    public function calculateTime($seconds, $microSeconds)
    {
        $uuidTime = new BigNumber('0');

$sec = new BigNumber($seconds);
        $sec->multiply('10000000');

$usec = new BigNumber($microSeconds);
        $usec->multiply('10');

$uuidTime
            ->add($sec)
            ->add($usec)
            ->add('122192928000000000');

$uuidTimeHex = sprintf('%016s', $uuidTime->convertToBase(16));

return [
            'low' => substr($uuidTimeHex, 8),
            'mid' => substr($uuidTimeHex, 4, 4),
            'hi' => substr($uuidTimeHex, 0, 4),
        ];
    }
}

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