<?php
namespace PhpZip\Extra\Fields;
use PhpZip\Extra\ExtraField;
use PhpZip\Util\PackUtil;
/**
* NTFS Extra Field
*
* @see https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT .ZIP File Format Specification
* @author Ne-Lexa [email protected]
* @license MIT
*/
class NtfsExtraField implements ExtraField
{
/**
* Modify time
*
* @var int Unix Timestamp
*/
private $mtime;
/**
* Access Time
*
* @var int Unix Timestamp
*/
private $atime;
/**
* Create Time
*
* @var int Unix Time
*/
private $ctime;
/**
* Returns the Header ID (type) of this Extra Field.
* The Header ID is an unsigned short integer (two bytes)
* which must be constant during the life cycle of this object.
*
* @return int
*/
public static function getHeaderId()
{
return 0x000a;
}
/**
* Initializes this Extra Field by deserializing a Data Block.
* @param string $data
*/
public function deserialize($data)
{
$unpack = unpack('vtag/vsizeAttr', substr($data, 0, 4));
if (24 === $unpack['sizeAttr']) {
$tagData = substr($data, 4, $unpack['sizeAttr']);
$this->mtime = PackUtil::unpackLongLE(substr($tagData, 0, 8)) / 10000000 - 11644473600;
$this->atime = PackUtil::unpackLongLE(substr($tagData, 8, 8)) / 10000000 - 11644473600;
$this->ctime = PackUtil::unpackLongLE(substr($tagData, 16, 8)) / 10000000 - 11644473600;
}
}
/**
* Serializes a Data Block.
* @return string
*/
public function serialize()
{
$serialize = '';
if (null !== $this->mtime && null !== $this->atime && null !== $this->ctime) {
$mtimeLong = ($this->mtime + 11644473600) * 10000000;
$atimeLong = ($this->atime + 11644473600) * 10000000;
$ctimeLong = ($this->ctime + 11644473600) * 10000000;
$serialize .= pack('Vvv', 0, 1, 8 * 3)
. PackUtil::packLongLE($mtimeLong)
. PackUtil::packLongLE($atimeLong)
. PackUtil::packLongLE($ctimeLong);
}
return $serialize;
}
/**
* @return int
*/
public function getMtime()
{
return $this->mtime;
}
/**
* @param int $mtime
*/
public function setMtime($mtime)
{
$this->mtime = (int)$mtime;
}
/**
* @return int
*/
public function getAtime()
{
return $this->atime;
}
/**
* @param int $atime
*/
public function setAtime($atime)
{
$this->atime = (int)$atime;
}
/**
* @return int
*/
public function getCtime()
{
return $this->ctime;
}
/**
* @param int $ctime
*/
public function setCtime($ctime)
{
$this->ctime = (int)$ctime;
}
}