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<?php
/*
* This file is part of the Predis package.
*
* (c) Daniele Alessandri <suppakilla@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Predis\Cluster\Hash;
use Predis\NotSupportedException;
/**
* Hash generator implementing the CRC-CCITT-16 algorithm used by redis-cluster.
*
* @author Daniele Alessandri <suppakilla@gmail.com>
*/
class PhpiredisCRC16 implements HashGeneratorInterface
{
/**
*
*/
public function __construct()
{
if (!function_exists('phpiredis_utils_crc16')) {
// @codeCoverageIgnoreStart
throw new NotSupportedException(
'This hash generator requires a compatible version of ext-phpiredis'
);
// @codeCoverageIgnoreEnd
}
}
/**
* {@inheritdoc}
*/
public function hash($value)
{
return phpiredis_utils_crc16($value);
}
}
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