--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/functions/qfunctionavailablefn.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,91 @@
+/****************************************************************************
+**
+** 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 "qboolean_p.h"
+#include "qdelegatingnamespaceresolver_p.h"
+#include "qinteger_p.h"
+#include "qqnameconstructor_p.h"
+
+#include "qfunctionavailablefn_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+Item FunctionAvailableFN::evaluateSingleton(const DynamicContext::Ptr &context) const
+{
+    const QString lexQName(m_operands.first()->evaluateSingleton(context).stringValue());
+
+    NamespaceResolver::Bindings override;
+    override.insert(StandardPrefixes::empty, m_defFuncNS);
+
+    const NamespaceResolver::Ptr resolver(new DelegatingNamespaceResolver(staticNamespaces(), override));
+
+    const QXmlName name
+        (QNameConstructor::expandQName<DynamicContext::Ptr,
+                                       ReportContext::XTDE1400,
+                                       ReportContext::XTDE1400>(lexQName,
+                                                                context,
+                                                                resolver,
+                                                                this));
+
+    xsInteger arity;
+
+    if(m_operands.count() == 2)
+        arity = m_operands.at(1)->evaluateSingleton(context).as<Numeric>()->toInteger();
+    else
+        arity = FunctionSignature::UnlimitedArity;
+
+    return Boolean::fromValue(m_functionFactory->isAvailable(context->namePool(), name, arity));
+}
+
+Expression::Ptr FunctionAvailableFN::typeCheck(const StaticContext::Ptr &context,
+                                               const SequenceType::Ptr &reqType)
+{
+    m_functionFactory = context->functionSignatures();
+    Q_ASSERT(m_functionFactory);
+    m_defFuncNS = context->namePool()->allocateNamespace(context->defaultFunctionNamespace());
+    /* m_defFuncNS can be empty/null or an actual value. */
+
+    return StaticNamespacesContainer::typeCheck(context, reqType);
+}
+
+QT_END_NAMESPACE