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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qcallsite_p.h"
#include "qcalltargetdescription_p.h"
QT_BEGIN_NAMESPACE
using namespace QPatternist;
CallTargetDescription::CallTargetDescription(const QXmlName &name) : m_name(name)
{
Q_ASSERT(!m_name.isNull());
}
QXmlName CallTargetDescription::name() const
{
return m_name;
}
void CallTargetDescription::checkArgumentsCircularity(CallTargetDescription::List &signList,
const Expression::Ptr callsite)
{
/* Check the arguments. */
const Expression::List ops(callsite->operands());
const Expression::List::const_iterator end(ops.constEnd());
Expression::List::const_iterator it(ops.constBegin());
for(; it != end; ++it)
checkCallsiteCircularity(signList, *it);
}
void CallTargetDescription::checkCallsiteCircularity(CallTargetDescription::List &signList,
const Expression::Ptr expr)
{
Q_ASSERT(expr);
if(expr->is(Expression::IDUserFunctionCallsite))
{
CallTargetDescription::List::const_iterator it(signList.constBegin());
const CallTargetDescription::List::const_iterator end(signList.constEnd());
CallSite *const callsite = static_cast<CallSite *>(expr.data());
for(; it != end; ++it)
{
if(callsite->configureRecursion(*it))
{
/* A callsite inside the function body to the function. This user function
* is recursive if it's to the same function, in other words. Which it was
* if configureRecursion() returned true. */
/* Now we continue and check the arguments of the callsite. That is, the arguments.
* This catches for instance local:foo(local:foo(3)). */
checkArgumentsCircularity(signList, expr);
return;
}
}
/* Check the body of the function so this callsite isn't "indirectly" a
* recursive call to the function we're checking. XQTS test case
* default_namespace-011 is an example of this. */
signList.append(callsite->callTargetDescription());
checkCallsiteCircularity(signList, callsite->body());
}
checkArgumentsCircularity(signList, expr); /* We're done in this case. */
}
QT_END_NAMESPACE
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