<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Filter\Compress;
use Zend\Filter\Exception;
/**
* Compression adapter for php snappy (http://code.google.com/p/php-snappy/)
*/
class Snappy implements CompressionAlgorithmInterface
{
/**
* Class constructor
*
* @param null|array|\Traversable $options (Optional) Options to set
* @throws Exception\ExtensionNotLoadedException if snappy extension not loaded
*/
public function __construct($options = null)
{
if (!extension_loaded('snappy')) {
throw new Exception\ExtensionNotLoadedException('This filter needs the snappy extension');
}
}
/**
* Compresses the given content
*
* @param string $content
* @return string
* @throws Exception\RuntimeException on memory, output length or data warning
*/
public function compress($content)
{
$compressed = snappy_compress($content);
if ($compressed === false) {
throw new Exception\RuntimeException('Error while compressing.');
}
return $compressed;
}
/**
* Decompresses the given content
*
* @param string $content
* @return string
* @throws Exception\RuntimeException on memory, output length or data warning
*/
public function decompress($content)
{
$compressed = snappy_uncompress($content);
if ($compressed === false) {
throw new Exception\RuntimeException('Error while decompressing.');
}
return $compressed;
}
/**
* Returns the adapter name
*
* @return string
*/
public function toString()
{
return 'Snappy';
}
}