Merge "Clarify UsbConnection#bulkTransfer api behavior"

     * </p>

     *

     * @param endpoint the endpoint for this transaction

     * @param buffer buffer for data to send or receive

     * @param buffer buffer for data to send or receive; can be {@code null} to wait for next

     *               transaction without reading data

     * @param length the length of the data to send or receive

     * @param timeout in milliseconds

     * @param timeout in milliseconds, 0 is infinite

     * @return length of data transferred (or zero) for success,

     * or negative value for failure

     */

     * @param buffer buffer for data to send or receive

     * @param offset the index of the first byte in the buffer to send or receive

     * @param length the length of the data to send or receive

     * @param timeout in milliseconds

     * @param timeout in milliseconds, 0 is infinite

     * @return length of data transferred (or zero) for success,

     * or negative value for failure

     */

    private static void checkBounds(byte[] buffer, int start, int length) {

        final int bufferLength = (buffer != null ? buffer.length : 0);

        if (start < 0 || start + length > bufferLength) {

        if (length < 0 || start < 0 || start + length > bufferLength) {

            throw new IllegalArgumentException("Buffer start or length out of bounds.");

        }

    }