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Diffstat (limited to 'qtinterface/qt4/Qt/q3tl.h')
| -rw-r--r-- | qtinterface/qt4/Qt/q3tl.h | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/qtinterface/qt4/Qt/q3tl.h b/qtinterface/qt4/Qt/q3tl.h new file mode 100644 index 0000000..9d800bd --- /dev/null +++ b/qtinterface/qt4/Qt/q3tl.h @@ -0,0 +1,212 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Qt3Support module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial Usage +** Licensees holding valid Qt Commercial licenses may use this file in +** accordance with the Qt Commercial License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Nokia. +** +** 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 1.1, 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 have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef Q3TL_H +#define Q3TL_H + +#include <QtCore/qalgorithms.h> + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +QT_MODULE(Qt3SupportLight) + +template <typename T, typename LessThan> +Q_OUTOFLINE_TEMPLATE void qHeapSortPushDown(T *heap, int first, int last, LessThan lessThan) +{ + int r = first; + while (r <= last / 2) { + if (last == 2 * r) { + // node r has only one child + if (lessThan(heap[2 * r], heap[r])) + qSwap(heap[r], heap[2 * r]); + r = last; + } else { + // node r has two children + if (lessThan(heap[2 * r], heap[r]) && !lessThan(heap[2 * r + 1], heap[2 * r])) { + // swap with left child + qSwap(heap[r], heap[2 * r]); + r *= 2; + } else if (lessThan(heap[2 * r + 1], heap[r]) + && lessThan(heap[2 * r + 1], heap[2 * r])) { + // swap with right child + qSwap(heap[r], heap[2 * r + 1]); + r = 2 * r + 1; + } else { + r = last; + } + } + } +} + +template <typename BiIterator, typename T, typename LessThan> +Q_OUTOFLINE_TEMPLATE void qHeapSortHelper(BiIterator begin, BiIterator end, const T & /* dummy */, LessThan lessThan) +{ + BiIterator it = begin; + uint n = 0; + while (it != end) { + ++n; + ++it; + } + if (n == 0) + return; + + // Create the heap + BiIterator insert = begin; + T *realheap = new T[n]; + T *heap = realheap - 1; + int size = 0; + for(; insert != end; ++insert) { + heap[++size] = *insert; + int i = size; + while (i > 1 && lessThan(heap[i], heap[i / 2])) { + qSwap(heap[i], heap[i / 2]); + i /= 2; + } + } + + // Now do the sorting + for (int i = n; i > 0; i--) { + *begin++ = heap[1]; + if (i > 1) { + heap[1] = heap[i]; + qHeapSortPushDown(heap, 1, i - 1, lessThan); + } + } + + delete[] realheap; +} + +template <typename BiIterator, typename T> +inline void qHeapSortHelper(BiIterator begin, BiIterator end, const T &dummy) +{ + qHeapSortHelper(begin, end, dummy, qLess<T>()); +} + +template <typename BiIterator, typename LessThan> +inline void qHeapSort(BiIterator begin, BiIterator end, LessThan lessThan) +{ + if (begin != end) + qHeapSortHelper(begin, end, *begin, lessThan); +} + +template <typename BiIterator> +inline void qHeapSort(BiIterator begin, BiIterator end) +{ + if (begin != end) + qHeapSortHelper(begin, end, *begin); +} + +template <typename Container> +inline void qHeapSort(Container &c) +{ +#ifdef Q_CC_BOR + // Work around Borland 5.5 optimizer bug + c.detach(); +#endif + if (!c.empty()) + qHeapSortHelper(c.begin(), c.end(), *c.begin()); +} + + +template <typename BiIterator, typename LessThan> +void qBubbleSort(BiIterator begin, BiIterator end, LessThan lessThan) +{ + // Goto last element; + BiIterator last = end; + + // empty list + if (begin == end) + return; + + --last; + // only one element ? + if (last == begin) + return; + + // So we have at least two elements in here + while (begin != last) { + bool swapped = false; + BiIterator swapPos = begin; + BiIterator x = end; + BiIterator y = x; + y--; + do { + --x; + --y; + if (lessThan(*x, *y)) { + swapped = true; + qSwap(*x, *y); + swapPos = y; + } + } while (y != begin); + if (!swapped) + return; + begin = swapPos; + ++begin; + } +} + +template <typename BiIterator, typename T> +void qBubbleSortHelper(BiIterator begin, BiIterator end, T) +{ + qBubbleSort(begin, end, qLess<T>()); +} + +template <typename BiIterator> +void qBubbleSort(BiIterator begin, BiIterator end) +{ + if (begin != end) + qBubbleSortHelper(begin, end, *begin); +} + +template <typename Container> +inline void qBubbleSort(Container &c) +{ + qBubbleSort(c.begin(), c.end()); +} + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif // Q3TL_H |