Add support for the Shearwater Swift GPS

With the new Swift GPS transmitter, the GPS location of the dive entry
and exit points are stored in the opening and closing record number 9.

At the moment only the entry location is reported because the api only
supports a single location.

Cherry-picked-by: Michael Keller <[email protected]>
Signed-off-by: Michael Keller <[email protected]>

Author: jefdriesen

src/shearwater_predator_parser.c

@@ -48,6 +48,8 @@
 #define LOG_RECORD_OPENING_5       0x15
 #define LOG_RECORD_OPENING_6       0x16
 #define LOG_RECORD_OPENING_7       0x17
+#define LOG_RECORD_OPENING_8       0x18
+#define LOG_RECORD_OPENING_9       0x19
 #define LOG_RECORD_CLOSING_0       0x20
 #define LOG_RECORD_CLOSING_1       0x21
 #define LOG_RECORD_CLOSING_2       0x22
@@ -56,6 +58,8 @@
 #define LOG_RECORD_CLOSING_5       0x25
 #define LOG_RECORD_CLOSING_6       0x26
 #define LOG_RECORD_CLOSING_7       0x27
+#define LOG_RECORD_CLOSING_8       0x28
+#define LOG_RECORD_CLOSING_9       0x29
 #define LOG_RECORD_INFO_EVENT      0x30
 #define LOG_RECORD_DIVE_SAMPLE_EXT 0xE1
 #define LOG_RECORD_FINAL           0xFF
@@ -103,7 +107,7 @@
 #define NGASMIXES 20
 #define NFIXED    10
 #define NTANKS    6
-#define NRECORDS  8
+#define NRECORDS  10
 #define MAXSTRINGS 32
 
 #define PREDATOR 2
@@ -657,7 +661,7 @@ shearwater_predator_parser_cache (shearwater_predator_parser_t *parser)
 		} else if (type == LOG_RECORD_FREEDIVE_SAMPLE) {
 			// Freedive record
 			divemode = M_FREEDIVE;
-		} else if (type >= LOG_RECORD_OPENING_0 && type <= LOG_RECORD_OPENING_7) {
+		} else if (type >= LOG_RECORD_OPENING_0 && type <= LOG_RECORD_OPENING_9) {
 			// Opening record
 			parser->opening[type - LOG_RECORD_OPENING_0] = offset;
 
@@ -760,7 +764,7 @@ shearwater_predator_parser_cache (shearwater_predator_parser_t *parser)
 					memcpy (tank[3].name, data + offset + 12, sizeof (tank[3].name));
 				}
 			}
-		} else if (type >= LOG_RECORD_CLOSING_0 && type <= LOG_RECORD_CLOSING_7) {
+		} else if (type >= LOG_RECORD_CLOSING_0 && type <= LOG_RECORD_CLOSING_9) {
 			if (type == LOG_RECORD_CLOSING_6) {
 				if (logversion >= 11) {
 					if (stack_time_total_s > 0) {
@@ -991,11 +995,13 @@ shearwater_predator_parser_get_field (dc_parser_t *abstract, dc_field_type_t typ
 
 	unsigned int decomodel_idx = parser->pnf ? parser->opening[2] + 18 : 67;
 	unsigned int gf_idx        = parser->pnf ? parser->opening[0] +  4 : 4;
+	int latitude = 0, longitude = 0;
 
 	dc_gasmix_t *gasmix = (dc_gasmix_t *) value;
 	dc_tank_t *tank = (dc_tank_t *) value;
 	dc_salinity_t *water = (dc_salinity_t *) value;
 	dc_decomodel_t *decomodel = (dc_decomodel_t *) value;
+	dc_location_t *location = (dc_location_t *) value;
 	dc_field_string_t *string = (dc_field_string_t *) value;
 
 	if (value) {
@@ -1091,6 +1097,17 @@ shearwater_predator_parser_get_field (dc_parser_t *abstract, dc_field_type_t typ
 				return DC_STATUS_DATAFORMAT;
 			}
 			break;
+		case DC_FIELD_LOCATION:
+			if (parser->opening[9] == UNDEFINED || parser->logversion < 17)
+				return DC_STATUS_UNSUPPORTED;
+			latitude  = (signed int) array_uint32_be (data + parser->opening[9] + 21);
+			longitude = (signed int) array_uint32_be (data + parser->opening[9] + 25);
+			if (latitude == 0 && longitude == 0)
+				return DC_STATUS_UNSUPPORTED;
+			location->latitude  = latitude  / 100000.0;
+			location->longitude = longitude / 100000.0;
+			location->altitude  = 0.0;
+			break;
 		case DC_FIELD_STRING:
 			return dc_field_get_string(&parser->cache, flags, string);
 		default: