211 lines
6.3 KiB
C
211 lines
6.3 KiB
C
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/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the test suite of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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QT_FORWARD_DECLARE_CLASS(QIODevice)
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QT_FORWARD_DECLARE_CLASS(QString)
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#include <QtCore/QFlags>
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class QC14N
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{
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public:
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enum Option
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{
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IgnoreProcessingInstruction,
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IgnoreComments
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};
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typedef QFlags<Option> Options;
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static bool isEqual(QIODevice *const firstDocument,
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QIODevice *const secondDocument,
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QString *const message = 0,
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const Options options = Options());
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private:
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static bool isDifferent(const QXmlStreamReader &r1,
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const QXmlStreamReader &r2,
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QString *const message);
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static bool isAttributesEqual(const QXmlStreamReader &r1,
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const QXmlStreamReader &r2,
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QString *const message);
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};
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#include <QXmlStreamReader>
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/*! \internal
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\a firstDocument and \a secondDocument must be pointers to opened devices.
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*/
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bool QC14N::isEqual(QIODevice *const firstDocument,
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QIODevice *const secondDocument,
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QString *const message,
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const Options options)
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{
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qDebug() << Q_FUNC_INFO;
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Q_ASSERT_X(firstDocument, Q_FUNC_INFO,
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"A valid QIODevice pointer must be supplied");
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Q_ASSERT_X(secondDocument, Q_FUNC_INFO,
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"A valid QIODevice pointer must be supplied");
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Q_ASSERT_X(firstDocument->isReadable(), Q_FUNC_INFO, "The device must be readable.");
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Q_ASSERT_X(secondDocument->isReadable(), Q_FUNC_INFO, "The device must be readable.");
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Q_ASSERT_X(options == Options(), Q_FUNC_INFO,
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"Not yet implemented.");
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Q_UNUSED(options);
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QXmlStreamReader r1(firstDocument);
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QXmlStreamReader r2(secondDocument);
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while(!r1.atEnd())
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{
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if(r1.error())
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{
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if(message)
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*message = r1.errorString();
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return false;
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}
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else if(r2.error())
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{
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if(message)
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*message = r1.errorString();
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return false;
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}
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else
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{
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if(isDifferent(r1, r2, message))
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return true;
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}
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r1.readNext();
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r2.readNext();
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}
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if(!r2.atEnd())
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{
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if(message)
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*message = QLatin1String("Reached the end of the first document, while there was still content left in the second");
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return false;
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}
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/* And they lived happily ever after. */
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return true;
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}
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/*! \internal
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*/
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bool QC14N::isAttributesEqual(const QXmlStreamReader &r1,
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const QXmlStreamReader &r2,
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QString *const message)
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{
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Q_UNUSED(message);
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const QXmlStreamAttributes &attrs1 = r1.attributes();
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const QXmlStreamAttributes &attrs2 = r2.attributes();
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const int len = attrs1.size();
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if(len != attrs2.size())
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return false;
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for(int i = 0; i < len; ++i)
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{
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if(!attrs2.contains(attrs1.at(i)))
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return false;
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}
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return true;
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}
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bool QC14N::isDifferent(const QXmlStreamReader &r1,
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const QXmlStreamReader &r2,
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QString *const message)
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{
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// TODO error reporting can be a lot better here.
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if(r1.tokenType() != r2.tokenType())
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return false;
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switch(r1.tokenType())
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{
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case QXmlStreamReader::NoToken:
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/* Fallthrough. */
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case QXmlStreamReader::StartDocument:
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/* Fallthrough. */
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case QXmlStreamReader::EndDocument:
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/* Fallthrough. */
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case QXmlStreamReader::DTD:
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return true;
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case QXmlStreamReader::Invalid:
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return false;
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case QXmlStreamReader::StartElement:
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{
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return r1.qualifiedName() == r2.qualifiedName()
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/* Yes, the namespace test below should be redundant, but with it we
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* trap namespace bugs in QXmlStreamReader, if any. */
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&& r1.namespaceUri() == r2.namespaceUri()
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&& isAttributesEqual(r1, r2, message);
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}
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case QXmlStreamReader::EndElement:
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{
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return r1.qualifiedName() == r2.qualifiedName()
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&& r1.namespaceUri() == r2.namespaceUri()
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&& r1.name() == r2.name();
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}
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case QXmlStreamReader::Characters:
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/* Fallthrough. */
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case QXmlStreamReader::Comment:
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return r1.text() == r2.text();
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case QXmlStreamReader::EntityReference:
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case QXmlStreamReader::ProcessingInstruction:
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{
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return r1.processingInstructionTarget() == r2.processingInstructionTarget() &&
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r2.processingInstructionData() == r2.processingInstructionData();
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}
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}
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Q_ASSERT_X(false, Q_FUNC_INFO, "This line should never be reached");
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return false;
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}
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