static bool
DownloadFlightInner(Port &port, const char *filename, FILE *file,
OperationEnvironment &env)
{
PortNMEAReader reader(port, env);
unsigned row_count = 0, i = 1;
while (true) {
/* read up to 32 lines at a time */
unsigned nrequest = row_count == 0 ? 1 : 32;
if (row_count > 0) {
assert(i <= row_count);
const unsigned remaining = row_count - i + 1;
if (nrequest > remaining)
nrequest = remaining;
}
const unsigned start = i;
const unsigned end = start + nrequest;
/* send request to Nano */
reader.Flush();
if (!RequestFlight(port, filename, start, end, env))
return false;
/* read the requested lines and save to file */
TimeoutClock timeout(2000);
while (i != end) {
const char *line = reader.ExpectLine("PLXVC,FLIGHT,A,", timeout);
if (line == nullptr ||
!HandleFlightLine(line, file, i, row_count))
return false;
}
if (i > row_count)
/* finished successfully */
return true;
if (start == 1)
/* configure the range in the first iteration, now that we know
the length of the file */
env.SetProgressRange(row_count);
env.SetProgressPosition(i - 1);
}
}
static bool
DownloadFlightInner(Port &port, const char *filename, FILE *file,
OperationEnvironment &env)
{
PortNMEAReader reader(port, env);
unsigned row_count = 0, i = 1;
while (true) {
/* read up to 32 lines at a time */
unsigned nrequest = row_count == 0 ? 1 : 32;
if (row_count > 0) {
assert(i <= row_count);
const unsigned remaining = row_count - i + 1;
if (nrequest > remaining)
nrequest = remaining;
}
const unsigned start = i;
const unsigned end = start + nrequest;
unsigned request_retry_count = 0;
/* read the requested lines and save to file */
while (i != end) {
if (i == start) {
/* send request range to Nano */
reader.Flush();
if (!RequestFlight(port, filename, start, end, env))
return false;
request_retry_count++;
}
TimeoutClock timeout(2000);
const char *line = reader.ExpectLine("PLXVC,FLIGHT,A,", timeout);
if (line == nullptr || !HandleFlightLine(line, file, i, row_count)) {
if (request_retry_count > 5)
return false;
/* Discard data which might still be in-transit, e.g. buffered
inside a bluetooth dongle */
port.FullFlush(env, 200, 2000);
/* If we already received parts of the request range correctly break
out of the loop to calculate new request range */
if (i != start)
break;
/* No valid reply received (i==start) - request same range again */
}
}
if (i > row_count)
/* finished successfully */
return true;
if (start == 1)
/* configure the range in the first iteration, now that we know
the length of the file */
env.SetProgressRange(row_count);
env.SetProgressPosition(i - 1);
}
}
