1 files changed, 23 insertions, 20 deletions
diff --git a/Swiften/IDN/IDNConverter.h b/Swiften/IDN/IDNConverter.h
index c55d969..27ddd78 100644
--- a/Swiften/IDN/IDNConverter.h
+++ b/Swiften/IDN/IDNConverter.h
@@ -1,31 +1,34 @@
 /*
- * Copyright (c) 2013 Remko Tronçon
- * Licensed under the GNU General Public License v3.
- * See Documentation/Licenses/GPLv3.txt for more information.
+ * Copyright (c) 2013-2016 Isode Limited.
+ * All rights reserved.
+ * See the COPYING file for more information.
  */
 
 #pragma once
 
 #include <string>
+
+#include <boost/optional.hpp>
+
 #include <Swiften/Base/API.h>
 #include <Swiften/Base/SafeByteArray.h>
 
 namespace Swift {
-	class SWIFTEN_API IDNConverter {
-		public:
-			virtual ~IDNConverter();
-
-			enum StringPrepProfile {
-				NamePrep,
-				XMPPNodePrep,
-				XMPPResourcePrep,
-				SASLPrep
-			};
-
-			virtual std::string getStringPrepared(const std::string& s, StringPrepProfile profile) = 0;
-			virtual SafeByteArray getStringPrepared(const SafeByteArray& s, StringPrepProfile profile) = 0;
-
-			// Thread-safe
-			virtual std::string getIDNAEncoded(const std::string& s) = 0;
-	};
+    class SWIFTEN_API IDNConverter {
+        public:
+            virtual ~IDNConverter();
+
+            enum StringPrepProfile {
+                NamePrep,
+                XMPPNodePrep,
+                XMPPResourcePrep,
+                SASLPrep
+            };
+
+            virtual std::string getStringPrepared(const std::string& s, StringPrepProfile profile) = 0;
+            virtual SafeByteArray getStringPrepared(const SafeByteArray& s, StringPrepProfile profile) = 0;
+
+            // Thread-safe
+            virtual boost::optional<std::string> getIDNAEncoded(const std::string& s) = 0;
+    };
 }