- /*
- * Given an AO_LOG_GPS_TIME record with correct time, and one
- * missing time, rewrite the missing time values with the good
- * ones, assuming that the difference between them is 'diff' seconds
- */
- void update_time(AltosOrderedMegaRecord good, AltosOrderedMegaRecord bad) {
-
- int diff = (bad.tick - good.tick + 50) / 100;
-
- int hour = (good.a & 0xff);
- int minute = (good.a >> 8);
- int second = (good.b & 0xff);
- int flags = (good.b >> 8);
- int seconds = hour * 3600 + minute * 60 + second;
-
- /* Make sure this looks like a good GPS value */
- if ((flags & AltosLib.AO_GPS_NUM_SAT_MASK) >> AltosLib.AO_GPS_NUM_SAT_SHIFT < 4)
- flags = (flags & ~AltosLib.AO_GPS_NUM_SAT_MASK) | (4 << AltosLib.AO_GPS_NUM_SAT_SHIFT);
- flags |= AltosLib.AO_GPS_RUNNING;
- flags |= AltosLib.AO_GPS_VALID;
-
- int new_seconds = seconds + diff;
- if (new_seconds < 0)
- new_seconds += 24 * 3600;
- int new_second = (new_seconds % 60);
- int new_minutes = (new_seconds / 60);
- int new_minute = (new_minutes % 60);
- int new_hours = (new_minutes / 60);
- int new_hour = (new_hours % 24);
-
- bad.a = new_hour + (new_minute << 8);
- bad.b = new_second + (flags << 8);
- }
-