--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaScriptCore/runtime/DateInstance.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,87 @@
+/*
+ *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
+ *  Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ *
+ *  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; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  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
+ *
+ */
+
+#include "config.h"
+#include "DateInstance.h"
+
+#include "JSGlobalObject.h"
+
+#include <math.h>
+#include <wtf/DateMath.h>
+#include <wtf/MathExtras.h>
+
+using namespace WTF;
+
+namespace JSC {
+
+const ClassInfo DateInstance::info = {"Date", 0, 0, 0};
+
+DateInstance::DateInstance(ExecState* exec, NonNullPassRefPtr<Structure> structure)
+    : JSWrapperObject(structure)
+{
+    setInternalValue(jsNaN(exec));
+}
+
+DateInstance::DateInstance(ExecState* exec, NonNullPassRefPtr<Structure> structure, double time)
+    : JSWrapperObject(structure)
+{
+    setInternalValue(jsNumber(exec, timeClip(time)));
+}
+
+DateInstance::DateInstance(ExecState* exec, double time)
+    : JSWrapperObject(exec->lexicalGlobalObject()->dateStructure())
+{
+    setInternalValue(jsNumber(exec, timeClip(time)));
+}
+
+const GregorianDateTime* DateInstance::calculateGregorianDateTime(ExecState* exec) const
+{
+    double milli = internalNumber();
+    if (isnan(milli))
+        return 0;
+
+    if (!m_data)
+        m_data = exec->globalData().dateInstanceCache.add(milli);
+
+    if (m_data->m_gregorianDateTimeCachedForMS != milli) {
+        msToGregorianDateTime(exec, milli, false, m_data->m_cachedGregorianDateTime);
+        m_data->m_gregorianDateTimeCachedForMS = milli;
+    }
+    return &m_data->m_cachedGregorianDateTime;
+}
+
+const GregorianDateTime* DateInstance::calculateGregorianDateTimeUTC(ExecState* exec) const
+{
+    double milli = internalNumber();
+    if (isnan(milli))
+        return 0;
+
+    if (!m_data)
+        m_data = exec->globalData().dateInstanceCache.add(milli);
+
+    if (m_data->m_gregorianDateTimeUTCCachedForMS != milli) {
+        msToGregorianDateTime(exec, milli, true, m_data->m_cachedGregorianDateTimeUTC);
+        m_data->m_gregorianDateTimeUTCCachedForMS = milli;
+    }
+    return &m_data->m_cachedGregorianDateTimeUTC;
+}
+
+} // namespace JSC