Function serial_flush

src/serial.c:820–918

* \brief Flush all characters waiting in RX buffer. * \param p * \return RIG_OK */

 * \return RIG_OK
 */
int HAMLIB_API serial_flush(hamlib_port_t *p)
{
    int len;
    int timeout_save;
    short timeout_retry_save;
    unsigned char buf[4096];

#ifdef __WIN32__
    struct termios_list *index;
    index = win32_serial_find_port(p->fd);

    if (!index)
    {
        rig_debug(RIG_DEBUG_ERR, "%s: No WIN32 index for port???\n", __func__);
        return -1;
    }

    PurgeComm(index->hComm, PURGE_RXCLEAR);
    return RIG_OK;

#endif

    if (p->fd == uh_ptt_fd || p->fd == uh_radio_fd || p->flushx)
    {
        /*
         * Catch microHam case:
         * if fd corresponds to a microHam device drain the line
         * (which is a socket) by reading until it is empty.
         */
        int n, nbytes = 0;

        rig_debug(RIG_DEBUG_TRACE, "%s: flushing\n", __func__);

        while ((n = read(p->fd, buf, sizeof(buf))) > 0)
        {
            nbytes += n;
            //int i;

            //for (i = 0; i < n; ++i) { printf("0x%02x(%c) ", buf[i], isprint(buf[i]) ? buf[i] : '~'); }

            /* do nothing */
        }

        rig_debug(RIG_DEBUG_TRACE, "read flushed %d bytes\n", nbytes);


        return (RIG_OK);
    }

    timeout_save = p->timeout;
    //rig_debug(RIG_DEBUG_ERR, "%s: p->timeout=%d\n", __func__,  p->timeout);
    timeout_retry_save = p->timeout_retry;
    p->timeout = 0;
    p->timeout_retry = 0;


    do
    {