diff -r 000000000000 -r 1918ee327afb src/xmlpatterns/functions/qdatetimefn.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/functions/qdatetimefn.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,96 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtXmlPatterns module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qatomiccomparator_p.h"
+#include "qcommonvalues_p.h"
+#include "qschemadatetime_p.h"
+#include "qdaytimeduration_p.h"
+#include "qdecimal_p.h"
+#include "qinteger_p.h"
+#include "qpatternistlocale_p.h"
+
+#include "qdatetimefn_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+Item DateTimeFN::evaluateSingleton(const DynamicContext::Ptr &context) const
+{
+    const Item di(m_operands.first()->evaluateSingleton(context));
+    if(!di)
+        return Item();
+
+    const Item ti(m_operands.last()->evaluateSingleton(context));
+    if(!ti)
+        return Item();
+
+    QDateTime date(di.as<AbstractDateTime>()->toDateTime());
+    Q_ASSERT(date.isValid());
+    QDateTime time(ti.as<AbstractDateTime>()->toDateTime());
+    Q_ASSERT(time.isValid());
+
+    if(date.timeSpec() == time.timeSpec() || /* Identical timezone properties. */
+       time.timeSpec() == Qt::LocalTime) /* time has no timezone, but date do. */
+    {
+        date.setTime(time.time());
+        Q_ASSERT(date.isValid());
+        return DateTime::fromDateTime(date);
+    }
+    else if(date.timeSpec() == Qt::LocalTime) /* date has no timezone, but time do. */
+    {
+        time.setDate(date.date());
+        Q_ASSERT(time.isValid());
+        return DateTime::fromDateTime(time);
+    }
+    else
+    {
+        context->error(QtXmlPatterns::tr("If both values have zone offsets, "
+                                         "they must have the same zone offset. "
+                                         "%1 and %2 are not the same.")
+                       .arg(formatData(di.stringValue()),
+                            formatData(di.stringValue())),
+                       ReportContext::FORG0008, this);
+        return Item(); /* Silence GCC warning. */
+    }
+}
+
+QT_END_NAMESPACE