/**
* call stream_seek() from parent class
*
* @param integer $position
* @return bool
*/
protected function parentStreamSeek($position)
{
return parent::stream_seek($position);
}
public function stream_seek($offset, $whence = SEEK_SET)
{
$return = false;
switch ($whence) {
case SEEK_SET:
if ($offset < $this->unencryptedSize && $offset >= 0) {
$newPosition = $offset;
}
break;
case SEEK_CUR:
if ($offset >= 0) {
$newPosition = $offset + $this->position;
}
break;
case SEEK_END:
if ($this->unencryptedSize + $offset >= 0) {
$newPosition = $this->unencryptedSize + $offset;
}
break;
default:
return $return;
}
$newFilePosition = floor($newPosition / $this->unencryptedBlockSize) * $this->util->getBlockSize() + $this->util->getHeaderSize();
$oldFilePosition = parent::stream_tell();
if (parent::stream_seek($newFilePosition)) {
parent::stream_seek($oldFilePosition);
$this->flush();
parent::stream_seek($newFilePosition);
$this->position = $newPosition;
$return = true;
}
return $return;
}
