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Diffstat (limited to 'src/xmlpatterns/api/qabstractxmlforwarditerator_p.h')
| -rw-r--r-- | src/xmlpatterns/api/qabstractxmlforwarditerator_p.h | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/src/xmlpatterns/api/qabstractxmlforwarditerator_p.h b/src/xmlpatterns/api/qabstractxmlforwarditerator_p.h new file mode 100644 index 0000000..836218e --- /dev/null +++ b/src/xmlpatterns/api/qabstractxmlforwarditerator_p.h @@ -0,0 +1,328 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. + +#ifndef QABSTRACTXMLFORWARDITERATOR_H +#define QABSTRACTXMLFORWARDITERATOR_H + +#include <QtCore/QList> +#include <QtCore/QVector> +#include <QtCore/QSharedData> + + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +QT_MODULE(XmlPatterns) + +template<typename T> class QVector; + +/* In this file we in some cases do not use QAbstractXmlForwardIterator's Ptr typedef. + * This is a compiler workaround for MS VS 6.0. */ + +template<typename T> +inline bool qIsForwardIteratorEnd(const T &unit) +{ + return !unit; +} + +template<typename T> class QAbstractXmlForwardIterator; + +class QAbstractXmlForwardIteratorPrivate; + +template<typename T> +class QAbstractXmlForwardIterator : public QSharedData +{ +public: + typedef QExplicitlySharedDataPointer<QAbstractXmlForwardIterator<T> > Ptr; + typedef QList<QExplicitlySharedDataPointer<QAbstractXmlForwardIterator<T> > > List; + typedef QVector<QExplicitlySharedDataPointer<QAbstractXmlForwardIterator<T> > > Vector; + + inline QAbstractXmlForwardIterator() {} + virtual ~QAbstractXmlForwardIterator() {} + + virtual T next() = 0; + virtual T current() const = 0; + + virtual qint64 position() const = 0; + + virtual typename QAbstractXmlForwardIterator<T>::Ptr toReversed(); + virtual QList<T> toList(); + virtual typename QAbstractXmlForwardIterator<T>::Ptr copy() const; + virtual T last(); + virtual bool isEmpty(); + virtual qint64 count(); + virtual qint64 sizeHint() const; + +private: + Q_DISABLE_COPY(QAbstractXmlForwardIterator<T>) + + QAbstractXmlForwardIteratorPrivate *d_ptr; /* Currently not used. */ +}; + +/* The namespace QPatternist and its members are internal, not part of the public API, and + * unsupported. Using them leads to undefined behavior. */ +namespace QPatternist +{ + class DeduplicateIterator; + + template<typename InputType, + typename OutputType, + typename Derived, + typename ListType = QList<InputType> > + class ListIteratorPlatform : public QAbstractXmlForwardIterator<OutputType> + { + /* This declaration is a workaround for a set of GCC versions on OS X, + * amongst others powerpc-apple-darwin8-gcc-4.0.1 (GCC) 4.0.1. In + * DeduplicateIterator, it fails to see the protected inheritance. */ + friend class DeduplicateIterator; + + public: + virtual OutputType next() + { + if(m_position == -1) + return OutputType(); + + if(m_position == m_list.count()) + { + m_position = -1; + m_current = OutputType(); + return OutputType(); + } + + m_current = static_cast<const Derived *>(this)->inputToOutputItem(m_list.at(m_position)); + ++m_position; + return m_current; + } + + virtual OutputType current() const + { + return m_current; + } + + virtual qint64 position() const + { + return m_position; + } + + virtual qint64 count() + { + return m_list.count(); + } + + virtual typename QAbstractXmlForwardIterator<OutputType>::Ptr copy() const + { + return QExplicitlySharedDataPointer<QAbstractXmlForwardIterator<OutputType> >(new ListIteratorPlatform<InputType, OutputType, Derived, ListType>(m_list)); + } + + protected: + inline ListIteratorPlatform(const ListType &list) : m_list(list) + , m_position(0) + { + } + + const ListType m_list; + qint64 m_position; + OutputType m_current; + }; + + template<typename T, + typename ListType = QList<T> > + class ListIterator : public ListIteratorPlatform<T, T, ListIterator<T, ListType>, ListType> + { + /* + * This declaration is needed for MSVC 2005, 14.00.50727.42 for 80x86. + */ + friend class IteratorVector; + + using ListIteratorPlatform<T, T, ListIterator<T, ListType>, ListType>::m_list; + + static inline QVector<T> toVector(const QVector<T> &vector) + { + return vector; + } + + static inline QVector<T> toVector(const QList<T> &list) + { + return list.toVector(); + } + + static inline QList<T> toList(const QVector<T> &vector) + { + return vector.toList(); + } + + static inline QList<T> toList(const QList<T> &list) + { + return list; + } + + public: + inline ListIterator(const ListType &list) : ListIteratorPlatform<T, T, ListIterator<T, ListType>, ListType>(list) + { + } + + virtual QList<T> toList() + { + return toList(m_list); + } + + virtual QVector<T> toVector() + { + return toVector(m_list); + } + + private: + inline const T &inputToOutputItem(const T &inputType) const + { + return inputType; + } + friend class ListIteratorPlatform<T, T, ListIterator<T, ListType>, ListType>; + + // needed for MSVC 2005 + friend class DeduplicateIterator; + }; + + template<typename T> + inline + typename QAbstractXmlForwardIterator<T>::Ptr + makeListIterator(const QList<T> &list) + { + return typename ListIterator<T>::Ptr(new ListIterator<T>(list)); + } + + template<typename T> + inline + typename QAbstractXmlForwardIterator<T>::Ptr + makeVectorIterator(const QVector<T> &vector) + { + return typename ListIterator<T, QVector<T> >::Ptr(new ListIterator<T, QVector<T> >(vector)); + } +} + +template<typename T> +QList<T> QAbstractXmlForwardIterator<T>::toList() +{ + QList<T> result; + T item(next()); + + while(!qIsForwardIteratorEnd(item)) + { + result.append(item); + item = next(); + } + + return result; +} + +template<typename T> +qint64 QAbstractXmlForwardIterator<T>::count() +{ + qint64 retval = 0; + + while(!qIsForwardIteratorEnd(next())) + ++retval; + + return retval; +} + +template<typename T> +typename QAbstractXmlForwardIterator<T>::Ptr QAbstractXmlForwardIterator<T>::toReversed() +{ + T item(next()); + QList<T> result; + + while(!qIsForwardIteratorEnd(item)) + { + result.prepend(item); + item = next(); + } + + return QExplicitlySharedDataPointer<QAbstractXmlForwardIterator<T> >(new QPatternist::ListIterator<T>(result)); +} + +template<typename T> +T QAbstractXmlForwardIterator<T>::last() +{ + T item(next()); + + while(!qIsForwardIteratorEnd(item)) + item = next(); + + return item; +} + +template<typename T> +typename QAbstractXmlForwardIterator<T>::Ptr QAbstractXmlForwardIterator<T>::copy() const +{ + Q_ASSERT_X(false, Q_FUNC_INFO, + "This function is internal, unsupported, and should never be called."); + return typename QAbstractXmlForwardIterator<T>::Ptr(); +} + +template<typename T> +bool QAbstractXmlForwardIterator<T>::isEmpty() +{ + return qIsForwardIteratorEnd(next()); +} + +template<typename T> +qint64 QAbstractXmlForwardIterator<T>::sizeHint() const +{ + Q_ASSERT_X(false, Q_FUNC_INFO, "This function is currently not expected to be used."); + return -1; +} + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif |