summaryrefslogtreecommitdiff
path: root/src/corelib/io/qdatastream.h
blob: 436bf8dd572920acb3111f0048dcb78f0546b3ba (plain)
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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QDATASTREAM_H
#define QDATASTREAM_H

#include <QtCore/qscopedpointer.h>
#include <QtCore/qiodevice.h>
#include <QtCore/qpair.h>

#ifdef Status
#error qdatastream.h must be included before any header file that defines Status
#endif

QT_BEGIN_NAMESPACE


class QByteArray;
class QIODevice;

template <typename T> class QList;
template <typename T> class QLinkedList;
template <typename T> class QVector;
template <typename T> class QSet;
template <class Key, class T> class QHash;
template <class Key, class T> class QMap;

#if !defined(QT_NO_DATASTREAM) || defined(QT_BOOTSTRAPPED)
class QDataStreamPrivate;
class Q_CORE_EXPORT QDataStream
{
public:
    enum Version {
        Qt_1_0 = 1,
        Qt_2_0 = 2,
        Qt_2_1 = 3,
        Qt_3_0 = 4,
        Qt_3_1 = 5,
        Qt_3_3 = 6,
        Qt_4_0 = 7,
        Qt_4_1 = Qt_4_0,
        Qt_4_2 = 8,
        Qt_4_3 = 9,
        Qt_4_4 = 10,
        Qt_4_5 = 11,
        Qt_4_6 = 12,
        Qt_4_7 = Qt_4_6,
        Qt_4_8 = Qt_4_7,
        Qt_4_9 = Qt_4_8,
        Qt_5_0 = 13,
        Qt_5_1 = 14,
        Qt_5_2 = 15,
        Qt_5_3 = Qt_5_2,
        Qt_5_4 = 16,
        Qt_5_5 = Qt_5_4,
#if QT_VERSION >= 0x050600
#error Add the datastream version for this Qt version and update Qt_DefaultCompiledVersion
#endif
        Qt_DefaultCompiledVersion = Qt_5_5
    };

    enum ByteOrder {
        BigEndian = QSysInfo::BigEndian,
        LittleEndian = QSysInfo::LittleEndian
    };

    enum Status {
        Ok,
        ReadPastEnd,
        ReadCorruptData,
        WriteFailed
    };

    enum FloatingPointPrecision {
        SinglePrecision,
        DoublePrecision
    };

    QDataStream();
    explicit QDataStream(QIODevice *);
    QDataStream(QByteArray *, QIODevice::OpenMode flags);
    QDataStream(const QByteArray &);
    ~QDataStream();

    QIODevice *device() const;
    void setDevice(QIODevice *);
    void unsetDevice();

    bool atEnd() const;

    Status status() const;
    void setStatus(Status status);
    void resetStatus();

    FloatingPointPrecision floatingPointPrecision() const;
    void setFloatingPointPrecision(FloatingPointPrecision precision);

    ByteOrder byteOrder() const;
    void setByteOrder(ByteOrder);

    int version() const;
    void setVersion(int);

    QDataStream &operator>>(qint8 &i);
    QDataStream &operator>>(quint8 &i);
    QDataStream &operator>>(qint16 &i);
    QDataStream &operator>>(quint16 &i);
    QDataStream &operator>>(qint32 &i);
    QDataStream &operator>>(quint32 &i);
    QDataStream &operator>>(qint64 &i);
    QDataStream &operator>>(quint64 &i);

    QDataStream &operator>>(bool &i);
    QDataStream &operator>>(float &f);
    QDataStream &operator>>(double &f);
    QDataStream &operator>>(char *&str);

    QDataStream &operator<<(qint8 i);
    QDataStream &operator<<(quint8 i);
    QDataStream &operator<<(qint16 i);
    QDataStream &operator<<(quint16 i);
    QDataStream &operator<<(qint32 i);
    QDataStream &operator<<(quint32 i);
    QDataStream &operator<<(qint64 i);
    QDataStream &operator<<(quint64 i);
    QDataStream &operator<<(bool i);
    QDataStream &operator<<(float f);
    QDataStream &operator<<(double f);
    QDataStream &operator<<(const char *str);

    QDataStream &readBytes(char *&, uint &len);
    int readRawData(char *, int len);

    QDataStream &writeBytes(const char *, uint len);
    int writeRawData(const char *, int len);

    int skipRawData(int len);

private:
    Q_DISABLE_COPY(QDataStream)

    QScopedPointer<QDataStreamPrivate> d;

    QIODevice *dev;
    bool owndev;
    bool noswap;
    ByteOrder byteorder;
    int ver;
    Status q_status;
};


/*****************************************************************************
  QDataStream inline functions
 *****************************************************************************/

inline QIODevice *QDataStream::device() const
{ return dev; }

inline QDataStream::ByteOrder QDataStream::byteOrder() const
{ return byteorder; }

inline int QDataStream::version() const
{ return ver; }

inline void QDataStream::setVersion(int v)
{ ver = v; }

inline QDataStream &QDataStream::operator>>(quint8 &i)
{ return *this >> reinterpret_cast<qint8&>(i); }

inline QDataStream &QDataStream::operator>>(quint16 &i)
{ return *this >> reinterpret_cast<qint16&>(i); }

inline QDataStream &QDataStream::operator>>(quint32 &i)
{ return *this >> reinterpret_cast<qint32&>(i); }

inline QDataStream &QDataStream::operator>>(quint64 &i)
{ return *this >> reinterpret_cast<qint64&>(i); }

inline QDataStream &QDataStream::operator<<(quint8 i)
{ return *this << qint8(i); }

inline QDataStream &QDataStream::operator<<(quint16 i)
{ return *this << qint16(i); }

inline QDataStream &QDataStream::operator<<(quint32 i)
{ return *this << qint32(i); }

inline QDataStream &QDataStream::operator<<(quint64 i)
{ return *this << qint64(i); }

template <typename T>
QDataStream& operator>>(QDataStream& s, QList<T>& l)
{
    l.clear();
    quint32 c;
    s >> c;
    l.reserve(c);
    for(quint32 i = 0; i < c; ++i)
    {
        T t;
        s >> t;
        l.append(t);
        if (s.atEnd())
            break;
    }
    return s;
}

template <typename T>
QDataStream& operator<<(QDataStream& s, const QList<T>& l)
{
    s << quint32(l.size());
    for (int i = 0; i < l.size(); ++i)
        s << l.at(i);
    return s;
}

template <typename T>
QDataStream& operator>>(QDataStream& s, QLinkedList<T>& l)
{
    l.clear();
    quint32 c;
    s >> c;
    for(quint32 i = 0; i < c; ++i)
    {
        T t;
        s >> t;
        l.append(t);
        if (s.atEnd())
            break;
    }
    return s;
}

template <typename T>
QDataStream& operator<<(QDataStream& s, const QLinkedList<T>& l)
{
    s << quint32(l.size());
    typename QLinkedList<T>::ConstIterator it = l.constBegin();
    for(; it != l.constEnd(); ++it)
        s << *it;
    return s;
}

template<typename T>
QDataStream& operator>>(QDataStream& s, QVector<T>& v)
{
    v.clear();
    quint32 c;
    s >> c;
    v.resize(c);
    for(quint32 i = 0; i < c; ++i) {
        T t;
        s >> t;
        v[i] = t;
    }
    return s;
}

template<typename T>
QDataStream& operator<<(QDataStream& s, const QVector<T>& v)
{
    s << quint32(v.size());
    for (typename QVector<T>::const_iterator it = v.begin(); it != v.end(); ++it)
        s << *it;
    return s;
}

template <typename T>
QDataStream &operator>>(QDataStream &in, QSet<T> &set)
{
    set.clear();
    quint32 c;
    in >> c;
    for (quint32 i = 0; i < c; ++i) {
        T t;
        in >> t;
        set << t;
        if (in.atEnd())
            break;
    }
    return in;
}

template <typename T>
QDataStream& operator<<(QDataStream &out, const QSet<T> &set)
{
    out << quint32(set.size());
    typename QSet<T>::const_iterator i = set.constBegin();
    while (i != set.constEnd()) {
        out << *i;
        ++i;
    }
    return out;
}

template <class Key, class T>
Q_OUTOFLINE_TEMPLATE QDataStream &operator>>(QDataStream &in, QHash<Key, T> &hash)
{
    QDataStream::Status oldStatus = in.status();
    in.resetStatus();
    hash.clear();

    quint32 n;
    in >> n;

    for (quint32 i = 0; i < n; ++i) {
        if (in.status() != QDataStream::Ok)
            break;

        Key k;
        T t;
        in >> k >> t;
        hash.insertMulti(k, t);
    }

    if (in.status() != QDataStream::Ok)
        hash.clear();
    if (oldStatus != QDataStream::Ok)
        in.setStatus(oldStatus);
    return in;
}

template <class Key, class T>
Q_OUTOFLINE_TEMPLATE QDataStream &operator<<(QDataStream &out, const QHash<Key, T>& hash)
{
    out << quint32(hash.size());
    typename QHash<Key, T>::ConstIterator it = hash.end();
    typename QHash<Key, T>::ConstIterator begin = hash.begin();
    while (it != begin) {
        --it;
        out << it.key() << it.value();
    }
    return out;
}
#ifdef Q_QDOC
template <class Key, class T>
Q_OUTOFLINE_TEMPLATE QDataStream &operator>>(QDataStream &in, QMap<Key, T> &map)
#else
template <class aKey, class aT>
Q_OUTOFLINE_TEMPLATE QDataStream &operator>>(QDataStream &in, QMap<aKey, aT> &map)
#endif
{
    QDataStream::Status oldStatus = in.status();
    in.resetStatus();
    map.clear();

    quint32 n;
    in >> n;

    map.detach();
    for (quint32 i = 0; i < n; ++i) {
        if (in.status() != QDataStream::Ok)
            break;

        aKey key;
        aT value;
        in >> key >> value;
        map.insertMulti(key, value);
    }
    if (in.status() != QDataStream::Ok)
        map.clear();
    if (oldStatus != QDataStream::Ok)
        in.setStatus(oldStatus);
    return in;
}

template <class Key, class T>
Q_OUTOFLINE_TEMPLATE QDataStream &operator<<(QDataStream &out, const QMap<Key, T> &map)
{
    out << quint32(map.size());
    typename QMap<Key, T>::ConstIterator it = map.end();
    typename QMap<Key, T>::ConstIterator begin = map.begin();
    while (it != begin) {
        --it;
        out << it.key() << it.value();
    }
    return out;
}

#ifndef QT_NO_DATASTREAM
template <class T1, class T2>
inline QDataStream& operator>>(QDataStream& s, QPair<T1, T2>& p)
{
    s >> p.first >> p.second;
    return s;
}

template <class T1, class T2>
inline QDataStream& operator<<(QDataStream& s, const QPair<T1, T2>& p)
{
    s << p.first << p.second;
    return s;
}
#endif

#endif // QT_NO_DATASTREAM

QT_END_NAMESPACE

#endif // QDATASTREAM_H