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Diffstat (limited to 'src/xmlpatterns/iterators/qrangeiterator.cpp')
| -rw-r--r-- | src/xmlpatterns/iterators/qrangeiterator.cpp | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/xmlpatterns/iterators/qrangeiterator.cpp b/src/xmlpatterns/iterators/qrangeiterator.cpp new file mode 100644 index 0000000..7f8f629 --- /dev/null +++ b/src/xmlpatterns/iterators/qrangeiterator.cpp @@ -0,0 +1,126 @@ +/**************************************************************************** +** +** 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. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qinteger_p.h" + +#include "qrangeiterator_p.h" + +QT_BEGIN_NAMESPACE + +using namespace QPatternist; + +RangeIterator::RangeIterator(const xsInteger start, + const Direction direction, + const xsInteger end) + : m_start(start), + m_end(end), + m_position(0), + m_count(start), + m_direction(direction), + m_increment(m_direction == Forward ? 1 : -1) +{ + Q_ASSERT(m_start < m_end); + Q_ASSERT(m_direction == Backward || m_direction == Forward); + + if(m_direction == Backward) + { + qSwap(m_start, m_end); + m_count = m_start; + } +} + +Item RangeIterator::next() +{ + if(m_position == -1) + return Item(); + else if((m_direction == Forward && m_count > m_end) || + (m_direction == Backward && m_count < m_end)) + { + m_position = -1; + m_current.reset(); + return Item(); + } + else + { + m_current = Integer::fromValue(m_count); + m_count += m_increment; + ++m_position; + return m_current; + } +} + +xsInteger RangeIterator::count() +{ + /* This complication is for handling that m_start & m_end may be reversed. */ + xsInteger ret; + + if(m_start < m_end) + ret = m_end - m_start; + else + ret = m_start - m_end; + + return ret + 1; +} + +Item::Iterator::Ptr RangeIterator::toReversed() +{ + return Item::Iterator::Ptr(new RangeIterator(m_start, Backward, m_end)); +} + +Item RangeIterator::current() const +{ + return m_current; +} + +xsInteger RangeIterator::position() const +{ + return m_position; +} + +Item::Iterator::Ptr RangeIterator::copy() const +{ + if(m_direction == Backward) + return Item::Iterator::Ptr(new RangeIterator(m_end, Backward, m_start)); + else + return Item::Iterator::Ptr(new RangeIterator(m_start, Forward, m_end)); +} + +QT_END_NAMESPACE |