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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 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 Lzf
*/
class Lzf implements CompressionAlgorithmInterface
{
/**
* Class constructor
*
* @param null $options
* @throws Exception\ExtensionNotLoadedException if lzf extension missing
*/
public function __construct($options = null)
{
if (!extension_loaded('lzf')) {
throw new Exception\ExtensionNotLoadedException('This filter needs the lzf extension');
}
}
/**
* Compresses the given content
*
* @param string $content
* @return string
* @throws Exception\RuntimeException if error occurs during compression
*/
public function compress($content)
{
$compressed = lzf_compress($content);
if (!$compressed) {
throw new Exception\RuntimeException('Error during compression');
}
return $compressed;
}
/**
* Decompresses the given content
*
* @param string $content
* @return string
* @throws Exception\RuntimeException if error occurs during decompression
*/
public function decompress($content)
{
$compressed = lzf_decompress($content);
if (!$compressed) {
throw new Exception\RuntimeException('Error during decompression');
}
return $compressed;
}
/**
* Returns the adapter name
*
* @return string
*/
public function toString()
{
return 'Lzf';
}
}
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