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diff --git a/src/libs/xpcom18a4/xpcom/ds/nsTime.h b/src/libs/xpcom18a4/xpcom/ds/nsTime.h
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+++ b/src/libs/xpcom18a4/xpcom/ds/nsTime.h
@@ -0,0 +1,143 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef nsTime_h__
+#define nsTime_h__
+
+#include "prtime.h"
+#include "nsInt64.h"
+#include "nscore.h"
+
+/**
+ * This class encapsulates full 64-bit time functionality and
+ * provides simple arithmetic and conversion operations.
+ */
+
+// If you ever decide that you need to add a non-inline method to this
+// class, be sure to change the class declaration to "class NS_BASE
+// nsTime".
+
+class nsTime : public nsInt64
+{
+public:
+    /**
+     * Construct the current time.
+     */
+    nsTime(void) : nsInt64(PR_Now()) {
+    }
+
+    /**
+     * Construct the time from a string.
+     */
+    nsTime(const char* dateStr, PRBool defaultToGMT) {
+        PRInt64 theTime;
+        PRStatus status = PR_ParseTimeString(dateStr, defaultToGMT, &theTime);
+        if (status == PR_SUCCESS)
+            mValue = theTime;
+        else
+            mValue = LL_ZERO;
+    }
+
+    /**
+     * Construct a time from a PRTime.
+     */
+    nsTime(const PRTime aTime) : nsInt64(aTime) {
+    }
+
+    /**
+     * Construct a time from a 64-bit value.
+     */
+    nsTime(const nsInt64& aTime) : nsInt64(aTime) {
+    }
+
+    /**
+     * Construct a time from another time.
+     */
+    nsTime(const nsTime& aTime) : nsInt64(aTime.mValue) {
+    }
+
+    // ~nsTime(void) -- XXX destructor unnecessary
+
+    /**
+     * Assign one time to another.
+     */
+    const nsTime& operator =(const nsTime& aTime) {
+        mValue = aTime.mValue;
+        return *this;
+    }
+
+    /**
+     * Convert a nsTime object to a PRTime
+     */
+    operator PRTime(void) const {
+        return mValue;
+    }
+};
+
+/**
+ * Determine if one time is strictly less than another
+ */
+inline const PRBool
+operator <(const nsTime& aTime1, const nsTime& aTime2) {
+    return aTime1.mValue < aTime2.mValue;
+}
+
+/**
+ * Determine if one time is less than or equal to another
+ */
+inline const PRBool
+operator <=(const nsTime& aTime1, const nsTime& aTime2) {
+    return aTime1.mValue <= aTime2.mValue;
+}
+
+/**
+ * Determine if one time is strictly greater than another
+ */
+inline const PRBool
+operator >(const nsTime& aTime1, const nsTime& aTime2) {
+    return aTime1.mValue > aTime2.mValue;
+}
+
+/**
+ * Determine if one time is greater than or equal to another
+ */
+inline const PRBool
+operator >=(const nsTime& aTime1, const nsTime& aTime2) {
+    return aTime1.mValue >= aTime2.mValue;
+}
+
+#endif // nsTime_h__