| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
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| ** GNU Lesser General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU Lesser |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
| ** Qt Foundation. The licenses are as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 |
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| ** information to ensure the GNU General Public License requirements will |
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| ****************************************************************************/ |
| |
| #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 |