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diff --git a/src/Common/UserLists/Util.h b/src/Common/UserLists/Util.h
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+/*
+ * Util.h
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MAD_COMMON_USERLISTS_UTIL_H_
+#define MAD_COMMON_USERLISTS_UTIL_H_
+
+#include "../export.h"
+
+#include "../XmlData.h"
+#include <boost/shared_ptr.hpp>
+
+namespace Mad {
+namespace Common {
+namespace UserLists {
+
+class UserList;
+class UserListDiff;
+class UserListEntry;
+
+class MAD_COMMON_EXPORT Util {
+  private:
+    static void serializeUserListEntry(const UserListEntry *user, XmlData::List::iterator entry);
+    static UserListEntry deserializeUserListEntry(XmlData::List::const_iterator entry);
+
+    Util();
+
+  public:
+    static void serializeUserList(const UserList *list, XmlData *data);
+    static boost::shared_ptr<UserList> deserializeUserList(const XmlData *data);
+
+    static void serializeUserListDiff(const UserListDiff *diff, XmlData *data);
+    static boost::shared_ptr<UserListDiff> deserializeUserListDiff(const XmlData *data);
+};
+
+}
+}
+}
+
+#endif /* MAD_COMMON_USERLISTS_UTIL_H_ */