[Modify] Move them to the extension methods

websocket-sharp/Ext.cs

@@ -513,11 +513,21 @@ namespace WebSocketSharp
       return opcode > 0x7 && opcode < 0x10;
     }
 
+    internal static bool IsControl (this Opcode opcode)
+    {
+      return opcode >= Opcode.Close;
+    }
+
     internal static bool IsData (this byte opcode)
     {
       return opcode == 0x1 || opcode == 0x2;
     }
 
+    internal static bool IsData (this Opcode opcode)
+    {
+      return opcode == Opcode.Text || opcode == Opcode.Binary;
+    }
+
     internal static bool IsPortNumber (this int value)
     {
       return value > 0 && value < 65536;

websocket-sharp/WebSocketFrame.cs

@@ -104,7 +104,7 @@ namespace WebSocketSharp
       Fin fin, Opcode opcode, PayloadData payloadData, bool compressed, bool mask)
     {
       _fin = fin;
-      _rsv1 = isData (opcode) && compressed ? Rsv.On : Rsv.Off;
+      _rsv1 = opcode.IsData () && compressed ? Rsv.On : Rsv.Off;
       _rsv2 = Rsv.Off;
       _rsv3 = Rsv.Off;
       _opcode = opcode;
@@ -377,16 +377,6 @@ namespace WebSocketSharp
       return output.ToString ();
     }
 
-    private static bool isControl (Opcode opcode)
-    {
-      return opcode == Opcode.Close || opcode == Opcode.Ping || opcode == Opcode.Pong;
-    }
-
-    private static bool isData (Opcode opcode)
-    {
-      return opcode == Opcode.Text || opcode == Opcode.Binary;
-    }
-
     private static string print (WebSocketFrame frame)
     {
       // Payload Length