1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the QtDeclarative 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.
** $QT_END_LICENSE$
**
****************************************************************************/
#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
|
