Accept prefixed callsigns, e.g. SP/N1ADJ

Author: jancona

encoding.go

@@ -20,7 +20,7 @@ var EncodedDestinationAllBytes = [6]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
 
 const m17Chars = " ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-/."
 
-var callsignRegex = regexp.MustCompile(`^[0-9]?[A-Z]{1,2}[0-9]{1,2}[A-Z]{1,4}([ -/\.][A-Z0-9 -/\.]*)?$`)
+var callsignRegex = regexp.MustCompile(`^([0-9]?[A-Z]{1,2}[0-9]{0,2}/)?[0-9]?[A-Z]{1,2}[0-9]{1,2}[A-Z]{1,4}([ -/\.][A-Z0-9 -/\.]*)?$`)
 var roomRegex = regexp.MustCompile(`^#[A-Z0-9 -/\.]+$`)
 
 func EncodeCallsign(callsign string) (*[6]byte, error) {

encoding_test.go

@@ -25,6 +25,16 @@ func TestEncodeCallsign(t *testing.T) {
 			want:    &[6]byte{0, 17, 44, 18, 146, 174},
 			wantErr: false,
 		},
+		{name: "SP/N1ADJ",
+			args:    args{callsign: "SP/N1ADJ"},
+			want:    &[6]byte{1, 129, 83, 62, 220, 19},
+			wantErr: false,
+		},
+		{name: "SP5/N1ADJ",
+			args:    args{callsign: "SP5/N1ADJ"},
+			want:    &[6]byte{60, 53, 1, 210, 198, 147},
+			wantErr: false,
+		},
 		{name: "n1adj",
 			args:    args{callsign: "N1ADJ"},
 			want:    &[6]byte{0, 0, 1, 138, 146, 174},