private function sizeFromCtrlByte($ctrlByte, $offset)
{
$size = $ctrlByte & 0x1f;
$bytesToRead = $size < 29 ? 0 : $size - 28;
$bytes = Util2::read($this->fileStream, $offset, $bytesToRead);
$decoded = $this->decodeUint($bytes);
if ($size == 29) {
$size = 29 + $decoded;
} elseif ($size == 30) {
$size = 285 + $decoded;
} elseif ($size > 30) {
$size = ($decoded & 0xfffffff >> 32 - 8 * $bytesToRead) + 65821;
}
return array($size, $offset + $bytesToRead);
}
