Kraken\Stream\StreamSeeker::tell PHP Метод

    public function tell()
    {
        if (!$this->isSeekable()) {
            throw new ReadException('Cannt tell offset of this kind of stream.');
        }
        $ret = ftell($this->resource);
        if ($ret === false) {
            throw new ReadException('Cannot tell offset of stream.');
        }
        return $ret;
    }