// IFM 4: Capability reply - OLD ITU 1371-4
// TODO(schwehr): WTF? 10 + 128 + 6 == 80 Is this 168 or 232 bits?
Ais6_1_4::Ais6_1_4(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), ack_dac(0), capabilities(),
cap_reserved(), spare2(0) {
assert(dac == 1);
assert(fi == 4);
// TODO(schwehr): num_bits for 6_1_4. 226 bits?
if (num_bits != 232) {
status = AIS_ERR_BAD_BIT_COUNT;
return;
}
AisBitset bs;
const AIS_STATUS r = bs.ParseNmeaPayload(nmea_payload, pad);
if (r != AIS_OK) {
status = r;
return;
}
bs.SeekTo(88);
ack_dac = bs.ToUnsignedInt(88, 10);
for (size_t cap_num = 0; cap_num < 128/2; cap_num++) {
size_t start = 98 + cap_num * 2;
capabilities[cap_num] = bs[start];
cap_reserved[cap_num] = bs[start + 1];
}
// spare2 = bs.ToUnsignedInt(226, 6); // OR NOT
// TODO(schwehr): add in the offset of the dest mmsi
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}