// IMO Circ 289 - Clearance time to enter port
Ais6_1_18::Ais6_1_18(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), link_id(0), utc_month(0), utc_day(0),
utc_hour(0), utc_min(0), spare2() {
assert(dac == 1);
assert(fi == 18);
if (num_bits != 360) {
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;
}
link_id = bs.ToUnsignedInt(88, 10);
utc_month = bs.ToUnsignedInt(98, 4);
utc_day = bs.ToUnsignedInt(102, 5);
utc_hour = bs.ToUnsignedInt(107, 5);
utc_min = bs.ToUnsignedInt(112, 6);
port_berth = bs.ToString(118, 120);
dest = bs.ToString(238, 30);
position = bs.ToAisPoint(268, 49);
spare2[0] = bs.ToUnsignedInt(317, 32);
spare2[1] = bs.ToUnsignedInt(349, 11);
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
Ais8_1_26_Location::Ais8_1_26_Location(const AisBitset &bits,
const size_t offset) {
position = bits.ToAisPoint(offset, 55);
z = bits.ToUnsignedInt(offset + 55, 11) / 10.;
owner = bits.ToUnsignedInt(offset + 66, 4);
timeout = bits.ToUnsignedInt(offset + 70, 3);
spare = bits.ToUnsignedInt(offset + 73, 12);
}
Ais8_366_22_Sector::Ais8_366_22_Sector(const AisBitset &bits,
const size_t offset) {
const int scale_factor = bits.ToUnsignedInt(offset + 3, 2);
position = bits.ToAisPoint(offset + 5, 55);
radius_m =
bits.ToUnsignedInt(offset + 60, 12) * scale_multipliers[scale_factor];
left_bound_deg = bits.ToUnsignedInt(offset + 72, 9);
right_bound_deg = bits.ToUnsignedInt(offset + 81, 9);
}
Ais8_366_22_Rect::Ais8_366_22_Rect(const AisBitset &bs,
const size_t offset) {
const int scale_factor = bs.ToUnsignedInt(offset + 3, 2);
position = bs.ToAisPoint(offset + 5, 55);
e_dim_m = bs.ToUnsignedInt(offset + 60, 8) * scale_multipliers[scale_factor];
n_dim_m = bs.ToUnsignedInt(offset + 68, 8) * scale_multipliers[scale_factor];
orient_deg = bs.ToUnsignedInt(offset + 76, 9);
spare = bs.ToUnsignedInt(offset + 85, 5);
}
Ais8_366_22_Circle::Ais8_366_22_Circle(const AisBitset &bits,
const size_t offset) {
const int scale_factor = bits.ToUnsignedInt(offset + 3, 2);
position = bits.ToAisPoint(offset + 5, 55);
// TODO(schwehr): precision? And bit counts for radius and spare?
// TODO(schwehr): collapse these numbers
radius_m =
bits.ToUnsignedInt(offset + 60, 12) * scale_multipliers[scale_factor];
spare = bits.ToUnsignedInt(offset + 72, 16);
}
// IMO Circ 289 - Berthing data
Ais6_1_20::Ais6_1_20(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), link_id(0), length(0), depth(0.0),
mooring_position(0), utc_month(0), utc_day(0), utc_hour(0), utc_min(0),
services_known(false), services() {
assert(dac == 1);
assert(fi == 20);
if (num_bits != 360) {
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);
link_id = bs.ToUnsignedInt(88, 10);
length = bs.ToUnsignedInt(98, 9);
depth = bs.ToUnsignedInt(107, 8);
mooring_position = bs.ToUnsignedInt(115, 3);
utc_month = bs.ToUnsignedInt(118, 4);
utc_day = bs.ToUnsignedInt(122, 5);
utc_hour = bs.ToUnsignedInt(127, 5);
utc_min = bs.ToUnsignedInt(132, 6);
services_known = bs[138];
for (size_t serv_num = 0; serv_num < 26; serv_num++) {
// TODO(schwehr): const int val = bs.ToUnsignedInt(139 + 2*serv_num, 2);
services[serv_num]
= static_cast<int>(bs.ToUnsignedInt(139 + 2*serv_num, 2));
}
name = bs.ToString(191, 120);
position = bs.ToAisPoint(311, 49);
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
// IMO Circ 289 - Tidal window
// See also Circ 236
Ais6_1_32::Ais6_1_32(const char *nmea_payload, const size_t pad)
: Ais6(nmea_payload, pad), utc_month(0), utc_day(0) {
assert(dac == 1);
assert(fi == 32);
// TODO(schwehr): might get messages with not all windows
if (num_bits != 350) {
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);
utc_month = bs.ToUnsignedInt(88, 4);
utc_day = bs.ToUnsignedInt(92, 5);
for (size_t window_num = 0; window_num < 3; window_num++) {
Ais6_1_32_Window w;
const size_t start = 97 + 88*window_num;
w.position = bs.ToAisPoint(start, 49);
w.from_utc_hour = bs.ToUnsignedInt(start + 49, 5);
w.from_utc_min = bs.ToUnsignedInt(start + 54, 6);
w.to_utc_hour = bs.ToUnsignedInt(start + 60, 5);
w.to_utc_min = bs.ToUnsignedInt(start + 65, 6);
w.cur_dir = bs.ToUnsignedInt(start + 71, 9);
w.cur_speed = bs.ToUnsignedInt(start + 80, 8) / 10.;
windows.push_back(w);
}
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
Ais23::Ais23(const char *nmea_payload, const size_t pad)
: AisMsg(nmea_payload, pad), spare(0), station_type(0), type_and_cargo(0),
spare2(3), txrx_mode(0), interval_raw(0), quiet(0), spare3(0) {
assert(message_id == 23);
if (pad != 2 || num_chars != 27) {
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(38);
spare = bs.ToUnsignedInt(38, 2);
position1 = bs.ToAisPoint(40, 35);
position2 = bs.ToAisPoint(75, 35);
station_type = bs.ToUnsignedInt(110, 4);
type_and_cargo = bs.ToUnsignedInt(114, 8);
spare2 = bs.ToUnsignedInt(122, 22);
txrx_mode = bs.ToUnsignedInt(144, 2);
interval_raw = bs.ToUnsignedInt(146, 4);
quiet = bs.ToUnsignedInt(150, 4);
spare3 = bs.ToUnsignedInt(154, 6);
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
Ais18::Ais18(const char *nmea_payload, const size_t pad)
: AisMsg(nmea_payload, pad),
spare(0),
sog(0.0),
position_accuracy(0),
cog(0.0),
true_heading(0),
timestamp(0),
spare2(0),
unit_flag(0),
display_flag(0),
dsc_flag(0),
band_flag(0),
m22_flag(0),
mode_flag(0),
raim(false),
commstate_flag(0),
sync_state(0),
slot_timeout_valid(false),
slot_timeout(0),
received_stations_valid(false),
received_stations(0),
slot_number_valid(false),
slot_number(0),
utc_valid(false),
utc_hour(0),
utc_min(0),
utc_spare(0),
slot_offset_valid(false),
slot_offset(0),
slot_increment_valid(false),
slot_increment(0),
slots_to_allocate_valid(false),
slots_to_allocate(0),
keep_flag_valid(false),
keep_flag(0),
commstate_cs_fill_valid(false),
commstate_cs_fill(0) {
assert(message_id == 18);
if (pad != 0 || num_chars != 28) {
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(38);
spare = bs.ToUnsignedInt(38, 8);
sog = bs.ToUnsignedInt(46, 10) / 10.;
position_accuracy = bs[56];
position = bs.ToAisPoint(57, 55);
cog = bs.ToUnsignedInt(112, 12) / 10.;
true_heading = bs.ToUnsignedInt(124, 9);
timestamp = bs.ToUnsignedInt(133, 6);
spare2 = bs.ToUnsignedInt(139, 2);
unit_flag = bs[141];
display_flag = bs[142];
dsc_flag = bs[143];
band_flag = bs[144];
m22_flag = bs[145];
mode_flag = bs[146];
raim = bs[147];
commstate_flag = bs[148]; // 0 SOTDMA, 1 ITDMA
if (unit_flag == 0) {
sync_state = bs.ToUnsignedInt(149, 2);
if (commstate_flag == 0) {
// SOTDMA
slot_timeout = bs.ToUnsignedInt(151, 3);
slot_timeout_valid = true;
switch (slot_timeout) {
case 0:
slot_offset = bs.ToUnsignedInt(154, 14);
slot_offset_valid = true;
break;
case 1:
utc_hour = bs.ToUnsignedInt(154, 5);
utc_min = bs.ToUnsignedInt(159, 7);
utc_spare = bs.ToUnsignedInt(166, 2);
utc_valid = true;
break;
case 2: // FALLTHROUGH
case 4: // FALLTHROUGH
case 6:
slot_number = bs.ToUnsignedInt(154, 14);
slot_number_valid = true;
break;
case 3: // FALLTHROUGH
case 5: // FALLTHROUGH
case 7:
received_stations = bs.ToUnsignedInt(154, 14);
received_stations_valid = true;
break;
default:
assert(false);
}
} else {
// ITDMA
slot_increment = bs.ToUnsignedInt(151, 13);
slot_increment_valid = true;
slots_to_allocate = bs.ToUnsignedInt(164, 3);
slots_to_allocate_valid = true;
keep_flag = bs[167];
keep_flag_valid = true;
}
} else {
// Carrier Sense (CS) with unit_flag of 1.
commstate_cs_fill = bs.ToUnsignedInt(149, 19);
commstate_cs_fill_valid = true;
}
assert(bs.GetRemaining() == 0);
status = AIS_OK;
}
