1.5

Esyur/Security/Integrity/NMEA0183.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Esyur.Security.Integrity
+{
+
+    public class NMEA0183
+    {
+        public static byte Compute(string data)
+        {
+            return Compute(data, 0, (uint)data.Length);
+        }
+
+        public static byte Compute(string data, uint offset, uint length)
+        {
+            byte rt = 0;
+            var ends = offset + length;
+            for (int i = (int)offset; i < ends; i++)
+                rt ^= (byte)data[i];
+
+            return rt;
+        }
+    }
+
+}