1 /****************************************************************************
3 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
4 ** All rights reserved.
5 ** Contact: http://www.qt-project.org/
7 ** This file is part of the QtDeclarative module of the Qt Toolkit.
9 ** $QT_BEGIN_LICENSE:LGPL$
10 ** GNU Lesser General Public License Usage
11 ** This file may be used under the terms of the GNU Lesser General Public
12 ** License version 2.1 as published by the Free Software Foundation and
13 ** appearing in the file LICENSE.LGPL included in the packaging of this
14 ** file. Please review the following information to ensure the GNU Lesser
15 ** General Public License version 2.1 requirements will be met:
16 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
18 ** In addition, as a special exception, Nokia gives you certain additional
19 ** rights. These rights are described in the Nokia Qt LGPL Exception
20 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
22 ** GNU General Public License Usage
23 ** Alternatively, this file may be used under the terms of the GNU General
24 ** Public License version 3.0 as published by the Free Software Foundation
25 ** and appearing in the file LICENSE.GPL included in the packaging of this
26 ** file. Please review the following information to ensure the GNU General
27 ** Public License version 3.0 requirements will be met:
28 ** http://www.gnu.org/copyleft/gpl.html.
31 ** Alternatively, this file may be used in accordance with the terms and
32 ** conditions contained in a signed written agreement between you and Nokia.
40 ****************************************************************************/
42 #ifndef QFLAGPOINTER_P_H
43 #define QFLAGPOINTER_P_H
49 // This file is not part of the Qt API. It exists purely as an
50 // implementation detail. This header file may change from version to
51 // version without notice, or even be removed.
56 #include <QtCore/qglobal.h>
63 inline QFlagPointer();
64 inline QFlagPointer(T *);
65 inline QFlagPointer(const QFlagPointer<T> &o);
67 inline bool isNull() const;
69 inline bool flag() const;
70 inline void setFlag();
71 inline void clearFlag();
73 inline bool flag2() const;
74 inline void setFlag2();
75 inline void clearFlag2();
77 inline QFlagPointer<T> &operator=(const QFlagPointer &o);
78 inline QFlagPointer<T> &operator=(T *);
80 inline T *operator->() const;
81 inline T *operator*() const;
86 static const intptr_t FlagBit = 0x1;
87 static const intptr_t Flag2Bit = 0x2;
88 static const intptr_t FlagsMask = FlagBit | Flag2Bit;
92 QFlagPointer<T>::QFlagPointer()
98 QFlagPointer<T>::QFlagPointer(T *v)
99 : ptr_value(intptr_t(v))
101 Q_ASSERT((ptr_value & FlagsMask) == 0);
105 QFlagPointer<T>::QFlagPointer(const QFlagPointer<T> &o)
106 : ptr_value(o.ptr_value)
111 bool QFlagPointer<T>::isNull() const
113 return 0 == (ptr_value & (~FlagsMask));
117 bool QFlagPointer<T>::flag() const
119 return ptr_value & FlagBit;
123 void QFlagPointer<T>::setFlag()
125 ptr_value |= FlagBit;
129 void QFlagPointer<T>::clearFlag()
131 ptr_value &= ~FlagBit;
135 bool QFlagPointer<T>::flag2() const
137 return ptr_value & Flag2Bit;
141 void QFlagPointer<T>::setFlag2()
143 ptr_value|= Flag2Bit;
147 void QFlagPointer<T>::clearFlag2()
149 ptr_value &= ~Flag2Bit;
153 QFlagPointer<T> &QFlagPointer<T>::operator=(const QFlagPointer &o)
155 ptr_value = o.ptr_value;
160 QFlagPointer<T> &QFlagPointer<T>::operator=(T *o)
162 Q_ASSERT((intptr_t(o) & FlagsMask) == 0);
164 ptr_value = intptr_t(o) | (ptr_value & FlagsMask);
169 T *QFlagPointer<T>::operator->() const
171 return (T *)(ptr_value & ~FlagsMask);
175 T *QFlagPointer<T>::operator*() const
177 return (T *)(ptr_value & ~FlagsMask);
182 #endif // QFLAGPOINTER_P_H