Added $GPRTE.

Implemented common interface for multi-part messages.

src/NmeaParser.Shared/Nmea/Gps/GPGSV.cs

@@ -27,7 +27,7 @@ namespace NmeaParser.Nmea.Gps
 	///  GPS Satellites in view
 	/// </summary>
 	[NmeaMessageType(Type = "GPGSV")]
-	public sealed class Gpgsv : NmeaMessage
+	public sealed class Gpgsv : NmeaMessage, IMultiPartMessage<SatelitteVehicle>
 	{
 		protected override void LoadMessage(string[] message)
 		{
@@ -65,6 +65,17 @@ namespace NmeaParser.Nmea.Gps
 		/// Dilution of precision
 		/// </summary>
 		public SatelitteVehicle[] SVs { get; private set; }
+
+		public IEnumerator<SatelitteVehicle> GetEnumerator()
+		{
+			foreach(var sv in SVs)
+				yield return sv;
+		}
+
+		System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
+		{
+			return GetEnumerator();
+		}
 	}
 
 	public sealed class SatelitteVehicle

src/NmeaParser.Shared/Nmea/Gps/GPRTE.cs

@@ -0,0 +1,76 @@
+//
+// Copyright (c) 2014 Morten Nielsen
+//
+// Licensed under the Microsoft Public License (Ms-PL) (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://opensource.org/licenses/Ms-PL.html
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NmeaParser.Nmea.Gps
+{
+	/// <summary>
+	///  Routes
+	/// </summary>
+	[NmeaMessageType(Type = "GPRTE")]
+	public sealed class Gprte : NmeaMessage, IMultiPartMessage<string>
+	{
+		public enum WaypointListType
+		{
+			CompleteWaypointsList,
+			RemainingWaypointsList
+		}
+		protected override void LoadMessage(string[] message)
+		{
+			TotalMessages = int.Parse(message[0]);
+			MessageNumber = int.Parse(message[1]);
+			ListType = message[2] == "c" ? WaypointListType.CompleteWaypointsList : WaypointListType.RemainingWaypointsList;
+			RouteID = message[3];
+			Waypoints = message.Skip(4).ToArray();
+		}
+
+		/// <summary>
+		/// Total number of messages of this type in this cycle
+		/// </summary>
+		public int TotalMessages { get; private set; }
+
+		/// <summary>
+		/// Message number
+		/// </summary>
+		public int MessageNumber { get; private set; }
+
+		public WaypointListType ListType { get; private set; }
+		
+		public string RouteID { get; set; }
+		
+		/// <summary>
+		/// Waypoints
+		/// </summary>
+		public string[] Waypoints { get; private set; }
+
+		IEnumerator<string> IEnumerable<string>.GetEnumerator()
+		{
+			foreach (string waypoint in Waypoints)
+				yield return waypoint;
+		}
+
+		System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
+		{
+			return ((IEnumerable<string>)this).GetEnumerator();
+		}
+	}
+}