feat: add MLA parser

standard/mla.go

@@ -0,0 +1,44 @@
+package standard
+
+import "github.com/twpayne/go-nmea"
+
+type MLA struct {
+	nmea.Address
+	NumMsg                 int
+	MsgNum                 int
+	PRN                    int
+	GPSWeek                int
+	SVHealth               int
+	Eccentricity           int
+	AlmanacReferenceTime   int
+	InclinationAngle       int
+	OmegaDot               int
+	RootAxis               int
+	Omega                  int
+	AscensionNodeLongitude int
+	MeanAnomaly            int
+	AF0                    int
+	AF1                    int
+}
+
+func ParseMLA(addr string, tok *nmea.Tokenizer) (*MLA, error) {
+	var mla MLA
+	mla.Address = nmea.NewAddress(addr)
+	mla.NumMsg = tok.CommaUnsignedInt()
+	mla.MsgNum = tok.CommaUnsignedInt()
+	mla.PRN = tok.CommaUnsignedInt()
+	mla.GPSWeek = tok.CommaUnsignedInt()
+	mla.SVHealth = tok.CommaHex()
+	mla.Eccentricity = tok.CommaHex()
+	mla.AlmanacReferenceTime = tok.CommaHex()
+	mla.InclinationAngle = tok.CommaHex()
+	mla.OmegaDot = tok.CommaHex()
+	mla.RootAxis = tok.CommaHex()
+	mla.Omega = tok.CommaHex()
+	mla.AscensionNodeLongitude = tok.CommaHex()
+	mla.MeanAnomaly = tok.CommaHex()
+	mla.AF0 = tok.CommaHex()
+	mla.AF1 = tok.CommaHex()
+	tok.EndOfData()
+	return &mla, tok.Err()
+}

standard/standard.go

@@ -32,6 +32,7 @@ var (
 		"GST": nmea.MakeSentenceParser(ParseGST),
 		"GSV": nmea.MakeSentenceParser(ParseGSV),
 		"HDT": nmea.MakeSentenceParser(ParseHDT),
+		"MLA": nmea.MakeSentenceParser(ParseMLA),
 		"MSS": nmea.MakeSentenceParser(ParseMSS),
 		"MTW": nmea.MakeSentenceParser(ParseMTW),
 		"RMB": nmea.MakeSentenceParser(ParseRMB),

standard/standard_test.go

@@ -1054,7 +1054,6 @@ func TestTheNMEA0813InformationSheetIssue4(t *testing.T) {
 
 func TestNovatel(t *testing.T) {
 	// From https://docs.novatel.com/OEM7/Content/Logs/Core_Logs.htm.
-	// FIXME add more test cases
 	nmeatest.TestSentenceParserFunc(t,
 		[]nmea.ParserOption{
 			nmea.WithChecksumDiscipline(nmea.ChecksumDisciplineStrict),
@@ -1298,6 +1297,27 @@ func TestNovatel(t *testing.T) {
 					HeadingTrue: 75.5664,
 				},
 			},
+			{
+				S: "$GLMLA,23,22,87,0864,83,021f,43,30bb,0000,34c0f6,0c8f05,065ccf,004357,000,00b*37",
+				Expected: &standard.MLA{
+					Address:                nmea.NewAddress("GLMLA"),
+					NumMsg:                 23,
+					MsgNum:                 22,
+					PRN:                    87,
+					GPSWeek:                864,
+					SVHealth:               0x83,
+					Eccentricity:           0x021f,
+					AlmanacReferenceTime:   0x43,
+					InclinationAngle:       0x30bb,
+					OmegaDot:               0x0000,
+					RootAxis:               0x34c0f6,
+					Omega:                  0x0c8f05,
+					AscensionNodeLongitude: 0x065ccf,
+					MeanAnomaly:            0x004357,
+					AF0:                    0x000,
+					AF1:                    0x00b,
+				},
+			},
 			{
 				S: "$GPRMB,A,4.32,L,FROM,TO,5109.7578000,N,11409.0960000,W,4.6,279.2,0.0,V,D*4A",
 				Expected: &standard.RMB{