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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
QT_FORWARD_DECLARE_CLASS(QIODevice)
QT_FORWARD_DECLARE_CLASS(QString)
#include <QtCore/QFlags>
class QC14N
{
public:
enum Option
{
IgnoreProcessingInstruction,
IgnoreComments
};
typedef QFlags<Option> Options;
static bool isEqual(QIODevice *const firstDocument,
QIODevice *const secondDocument,
QString *const message = 0,
const Options options = Options());
private:
static bool isDifferent(const QXmlStreamReader &r1,
const QXmlStreamReader &r2,
QString *const message);
static bool isAttributesEqual(const QXmlStreamReader &r1,
const QXmlStreamReader &r2,
QString *const message);
};
#include <QXmlStreamReader>
/*! \internal
\a firstDocument and \a secondDocument must be pointers to opened devices.
*/
bool QC14N::isEqual(QIODevice *const firstDocument,
QIODevice *const secondDocument,
QString *const message,
const Options options)
{
qDebug() << Q_FUNC_INFO;
Q_ASSERT_X(firstDocument, Q_FUNC_INFO,
"A valid QIODevice pointer must be supplied");
Q_ASSERT_X(secondDocument, Q_FUNC_INFO,
"A valid QIODevice pointer must be supplied");
Q_ASSERT_X(firstDocument->isReadable(), Q_FUNC_INFO, "The device must be readable.");
Q_ASSERT_X(secondDocument->isReadable(), Q_FUNC_INFO, "The device must be readable.");
Q_ASSERT_X(options == Options(), Q_FUNC_INFO,
"Not yet implemented.");
Q_UNUSED(options);
QXmlStreamReader r1(firstDocument);
QXmlStreamReader r2(secondDocument);
while(!r1.atEnd())
{
if(r1.error())
{
if(message)
*message = r1.errorString();
return false;
}
else if(r2.error())
{
if(message)
*message = r1.errorString();
return false;
}
else
{
if(isDifferent(r1, r2, message))
return true;
}
r1.readNext();
r2.readNext();
}
if(!r2.atEnd())
{
if(message)
*message = QLatin1String("Reached the end of the first document, while there was still content left in the second");
return false;
}
/* And they lived happily ever after. */
return true;
}
/*! \internal
*/
bool QC14N::isAttributesEqual(const QXmlStreamReader &r1,
const QXmlStreamReader &r2,
QString *const message)
{
Q_UNUSED(message);
const QXmlStreamAttributes &attrs1 = r1.attributes();
const QXmlStreamAttributes &attrs2 = r2.attributes();
const int len = attrs1.size();
if(len != attrs2.size())
return false;
for(int i = 0; i < len; ++i)
{
if(!attrs2.contains(attrs1.at(i)))
return false;
}
return true;
}
bool QC14N::isDifferent(const QXmlStreamReader &r1,
const QXmlStreamReader &r2,
QString *const message)
{
// TODO error reporting can be a lot better here.
if(r1.tokenType() != r2.tokenType())
return false;
switch(r1.tokenType())
{
case QXmlStreamReader::NoToken:
/* Fallthrough. */
case QXmlStreamReader::StartDocument:
/* Fallthrough. */
case QXmlStreamReader::EndDocument:
/* Fallthrough. */
case QXmlStreamReader::DTD:
return true;
case QXmlStreamReader::Invalid:
return false;
case QXmlStreamReader::StartElement:
{
return r1.qualifiedName() == r2.qualifiedName()
/* Yes, the namespace test below should be redundant, but with it we
* trap namespace bugs in QXmlStreamReader, if any. */
&& r1.namespaceUri() == r2.namespaceUri()
&& isAttributesEqual(r1, r2, message);
}
case QXmlStreamReader::EndElement:
{
return r1.qualifiedName() == r2.qualifiedName()
&& r1.namespaceUri() == r2.namespaceUri()
&& r1.name() == r2.name();
}
case QXmlStreamReader::Characters:
/* Fallthrough. */
case QXmlStreamReader::Comment:
return r1.text() == r2.text();
case QXmlStreamReader::EntityReference:
case QXmlStreamReader::ProcessingInstruction:
{
return r1.processingInstructionTarget() == r2.processingInstructionTarget() &&
r2.processingInstructionData() == r2.processingInstructionData();
}
}
Q_ASSERT_X(false, Q_FUNC_INFO, "This line should never be reached");
return false;
}
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