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diff --git a/linden/indra/llcommon/llavatarname.h b/linden/indra/llcommon/llavatarname.h
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+++ b/linden/indra/llcommon/llavatarname.h
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+/** 
+ * @file llavatarname.h
+ * @brief Represents name-related data for an avatar, such as the
+ * username/SLID ("bobsmith123" or "james.linden") and the display
+ * name ("James Cook")
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library 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;
+ * version 2.1 of the License only.
+ * 
+ * This library 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 library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+#ifndef LLAVATARNAME_H
+#define LLAVATARNAME_H
+
+#include <string>
+
+class LLSD;
+
+class LL_COMMON_API LLAvatarName
+{
+public:
+        LLAvatarName();
+        
+        bool operator<(const LLAvatarName& rhs) const;
+
+        LLSD asLLSD() const;
+
+        void fromLLSD(const LLSD& sd);
+
+        // For normal names, returns "James Linden (james.linden)"
+        // When display names are disabled returns just "James Linden"
+        std::string getCompleteName() const;
+
+        // For normal names, returns "Whatever Display Name (John Doe)" when
+        // display name and legacy name are different, or just "John Doe"
+        // when they are equal or when display names are disabled.
+        // When linefeed == true, the space between the display name and
+        // the opening parenthesis for the legacy name is replaced with a
+        // line feed.
+        std::string getNames(bool linefeed = false) const;
+
+        // Returns "James Linden" or "bobsmith123 Resident" for backwards
+        // compatibility with systems like voice and muting
+        std::string getLegacyName() const;
+
+        // "bobsmith123" or "james.linden", US-ASCII only
+        std::string mUsername;
+
+        // "Jose' Sanchez" or "James Linden", UTF-8 encoded Unicode
+        // Contains data whether or not user has explicitly set
+        // a display name; may duplicate their username.
+        std::string mDisplayName;
+
+        // For "James Linden", "James"
+        // For "bobsmith123", "bobsmith123"
+        // Used to communicate with legacy systems like voice and muting which
+        // rely on old-style names.
+        std::string mLegacyFirstName;
+
+        // For "James Linden", "Linden"
+        // For "bobsmith123", "Resident"
+        // see above for rationale
+        std::string mLegacyLastName;
+
+        // If true, both display name and SLID were generated from
+        // a legacy first and last name, like "James Linden (james.linden)"
+        bool mIsDisplayNameDefault;
+
+        // Under error conditions, we may insert "dummy" records with
+        // names equal to legacy name into caches as placeholders.
+        // These can be shown in UI, but are not serialized.
+        bool mIsDummy;
+
+        // Names can change, so need to keep track of when name was
+        // last checked.
+        // Unix time-from-epoch seconds for efficiency
+        F64 mExpires;
+        
+        // You can only change your name every N hours, so record
+        // when the next update is allowed
+        // Unix time-from-epoch seconds
+        F64 mNextUpdate;
+
+        // true to prevent the displaying of "Resident" as a last name
+        // in legacy names
+        static bool sOmitResidentAsLastName;
+};
+
+#endif