%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
namespace wapmorgan\UnifiedArchive\Drivers\OneFile;
use Exception;
use wapmorgan\UnifiedArchive\Formats;
class Gzip extends OneFileDriver
{
const EXTENSION_NAME = 'zlib';
const FORMAT = Formats::GZIP;
/**
* @inheritDoc
*/
public static function getDescription()
{
return 'adapter for ext-zlib'.(defined('ZLIB_VERSION') ? ' ('.ZLIB_VERSION.')' : null);
}
/**
* @param string $file GZipped file
* @return array|false Array with 'mtime' and 'size' items
*/
public static function gzipStat($file)
{
$fp = fopen($file, 'rb');
if (filesize($file) < 18 || strcmp(fread($fp, 2), "\x1f\x8b")) {
return false; // Not GZIP format (See RFC 1952)
}
$method = fread($fp, 1);
$flags = fread($fp, 1);
$stat = unpack('Vmtime', fread($fp, 4));
fseek($fp, -4, SEEK_END);
$stat += unpack('Vsize', fread($fp, 4));
fclose($fp);
return $stat;
}
/**
* @inheritDoc
*/
public function __construct($archiveFileName, $format, $password = null)
{
parent::__construct($archiveFileName, $format, $password);
$stat = static::gzipStat($archiveFileName);
if ($stat === false) {
throw new Exception('Could not open Gzip file');
}
$this->uncompressedSize = $stat['size'];
$this->modificationTime = $stat['mtime'];
}
/**
* @param string $fileName
*
* @return string|false
*/
public function getFileContent($fileName = null)
{
return gzdecode(file_get_contents($this->fileName));
}
/**
* @param string $fileName
*
* @return bool|resource|string
*/
public function getFileStream($fileName = null)
{
return gzopen($this->fileName, 'rb');
}
/**
* @param $data
* @param $compressionLevel
* @return mixed|string
*/
protected static function compressData($data, $compressionLevel)
{
static $compressionLevelMap = [
self::COMPRESSION_NONE => 0,
self::COMPRESSION_WEAK => 2,
self::COMPRESSION_AVERAGE => 4,
self::COMPRESSION_STRONG => 7,
self::COMPRESSION_MAXIMUM => 9,
];
return gzencode($data, $compressionLevelMap[$compressionLevel]);
}
}
Zerion Mini Shell 1.0