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Assets/Mirror/Transports/KCP/kcp2k/kcp/Utils.cs

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+using System.Runtime.CompilerServices;
+
+namespace kcp2k
+{
+    public static partial class Utils
+    {
+        // Clamp so we don't have to depend on UnityEngine
+        public static int Clamp(int value, int min, int max)
+        {
+            if (value < min) return min;
+            if (value > max) return max;
+            return value;
+        }
+
+        // encode 8 bits unsigned int
+        public static int Encode8u(byte[] p, int offset, byte value)
+        {
+            p[0 + offset] = value;
+            return 1;
+        }
+
+        // decode 8 bits unsigned int
+        public static int Decode8u(byte[] p, int offset, out byte value)
+        {
+            value = p[0 + offset];
+            return 1;
+        }
+
+        // encode 16 bits unsigned int (lsb)
+        public static int Encode16U(byte[] p, int offset, ushort value)
+        {
+            p[0 + offset] = (byte)(value >> 0);
+            p[1 + offset] = (byte)(value >> 8);
+            return 2;
+        }
+
+        // decode 16 bits unsigned int (lsb)
+        public static int Decode16U(byte[] p, int offset, out ushort value)
+        {
+            ushort result = 0;
+            result |= p[0 + offset];
+            result |= (ushort)(p[1 + offset] << 8);
+            value = result;
+            return 2;
+        }
+
+        // encode 32 bits unsigned int (lsb)
+        public static int Encode32U(byte[] p, int offset, uint value)
+        {
+            p[0 + offset] = (byte)(value >> 0);
+            p[1 + offset] = (byte)(value >> 8);
+            p[2 + offset] = (byte)(value >> 16);
+            p[3 + offset] = (byte)(value >> 24);
+            return 4;
+        }
+
+        // decode 32 bits unsigned int (lsb)
+        public static int Decode32U(byte[] p, int offset, out uint value)
+        {
+            uint result = 0;
+            result |= p[0 + offset];
+            result |= (uint)(p[1 + offset] << 8);
+            result |= (uint)(p[2 + offset] << 16);
+            result |= (uint)(p[3 + offset] << 24);
+            value = result;
+            return 4;
+        }
+
+        // timediff was a macro in original Kcp. let's inline it if possible.
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int TimeDiff(uint later, uint earlier)
+        {
+            return (int)(later - earlier);
+        }
+    }
+}