kakserpom / phpdaemon

     * @param  integer $o Offset

     * @return string|false

     */

    public function lookExact($n, $o = 0)

    {

        if (!isset($this->bev)) {

            return false;

        }

        if ($o + $n > $this->bev->input->length) {

            return false;

        }

        return $this->bev->input->substr($o, $n);

    }

    /**

     * @param integer $o Offset

     * @return string|false

     */

    public function look($n, $o = 0)

    {

        if (!isset($this->bev)) {

            return false;

        }

        if ($this->bev->input->length <= $o) {

            return '';

        }

        return $this->bev->input->substr($o, $n);

    }

    /**

     * @param  integer $n Number of bytes to read

     * @return string|false

     */

    public function readExact($n)

    {

        if ($n === 0) {

            return '';

        }

        if (!$this->bev || $this->bev->input->length < $n) {

            return false;

        }

        return $this->read($n);

    }

    /**

     * Returns length of input buffer

     * Reads all data from the connection's buffer

     * @return string Readed data

     */

    public function readUnlimited()

    {

        if (!isset($this->bev)) {

            return false;

        }

        $read = $this->bev->read($this->bev->input->length);

        if ($read === null) {

            return false;

        }

        return $read;

    }

}