| /**************************************************************************** |
| ** |
| ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). |
| ** All rights reserved. |
| ** Contact: Nokia Corporation (qt-info@nokia.com) |
| ** |
| ** This file is part of the QtDeclarative module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** GNU Lesser General Public License Usage |
| ** 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 |
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| ** file. Please review the following information to ensure the GNU Lesser |
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| ** |
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| ** 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 |
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| ** file. Please review the following information to ensure the GNU General |
| ** Public License version 3.0 requirements will be met: |
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| ** Other Usage |
| ** Alternatively, this file may be used in accordance with the terms and |
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| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #ifndef QBITFIELD_P_H |
| #define QBITFIELD_P_H |
| |
| // |
| // 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. |
| // |
| |
| #include <QtCore/qglobal.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QBitField |
| { |
| public: |
| inline QBitField(); |
| inline QBitField(const quint32 *, int bits); |
| inline QBitField(const QBitField &); |
| inline ~QBitField(); |
| |
| inline QBitField &operator=(const QBitField &); |
| |
| inline quint32 size() const; |
| inline QBitField united(const QBitField &); |
| inline bool testBit(int) const; |
| |
| private: |
| quint32 bits:31; |
| quint32 *ownData; |
| const quint32 *data; |
| }; |
| |
| QBitField::QBitField() |
| : bits(0), ownData(0), data(0) |
| { |
| } |
| |
| QBitField::QBitField(const quint32 *bitData, int bitCount) |
| : bits((quint32)bitCount), ownData(0), data(bitData) |
| { |
| } |
| |
| QBitField::QBitField(const QBitField &other) |
| : bits(other.bits), ownData(other.ownData), data(other.data) |
| { |
| if (ownData) |
| ++(*ownData); |
| } |
| |
| QBitField::~QBitField() |
| { |
| if (ownData) |
| if(0 == --(*ownData)) delete [] ownData; |
| } |
| |
| QBitField &QBitField::operator=(const QBitField &other) |
| { |
| if (other.data == data) |
| return *this; |
| |
| if (ownData) |
| if(0 == --(*ownData)) delete [] ownData; |
| |
| bits = other.bits; |
| ownData = other.ownData; |
| data = other.data; |
| |
| if (ownData) |
| ++(*ownData); |
| |
| return *this; |
| } |
| |
| inline quint32 QBitField::size() const |
| { |
| return bits; |
| } |
| |
| QBitField QBitField::united(const QBitField &o) |
| { |
| if (o.bits == 0) { |
| return *this; |
| } else if (bits == 0) { |
| return o; |
| } else { |
| int max = (bits > o.bits)?bits:o.bits; |
| int length = (max + 31) / 32; |
| QBitField rv; |
| rv.bits = max; |
| rv.ownData = new quint32[length + 1]; |
| *(rv.ownData) = 1; |
| rv.data = rv.ownData + 1; |
| if (bits > o.bits) { |
| ::memcpy((quint32 *)rv.data, data, length * sizeof(quint32)); |
| for (quint32 ii = 0; ii < (o.bits + quint32(31)) / 32; ++ii) |
| ((quint32 *)rv.data)[ii] |= o.data[ii]; |
| } else { |
| ::memcpy((quint32 *)rv.data, o.data, length * sizeof(quint32)); |
| for (quint32 ii = 0; ii < (bits + quint32(31)) / 32; ++ii) |
| ((quint32 *)rv.data)[ii] |= data[ii]; |
| } |
| return rv; |
| } |
| } |
| |
| bool QBitField::testBit(int b) const |
| { |
| Q_ASSERT(b >= 0); |
| if ((quint32)b < bits) { |
| return data[b / 32] & (1 << (b % 32)); |
| } else { |
| return false; |
| } |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif // QBITFIELD_P_H |