summaryrefslogtreecommitdiffstats
path: root/src/corelib/time/qdatetime.h
blob: c1653b5585c4957fbcf8c9dac2772accc97d69bc (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
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Copyright (C) 2016 Intel Corporation.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QDATETIME_H
#define QDATETIME_H

#include <QtCore/qstring.h>
#include <QtCore/qnamespace.h>
#include <QtCore/qshareddata.h>

#include <limits>

#if defined(Q_OS_DARWIN) || defined(Q_QDOC)
Q_FORWARD_DECLARE_CF_TYPE(CFDate);
Q_FORWARD_DECLARE_OBJC_CLASS(NSDate);
#endif

QT_BEGIN_NAMESPACE

class QCalendar;
class QTimeZone;
class QDateTime;

class Q_CORE_EXPORT QDate // ### Qt 6: change to be used by value, not const &
{
public:
    enum MonthNameType { // ### Qt 6: remove, along with methods using it
        DateFormat = 0,
        StandaloneFormat
    };
private:
    explicit Q_DECL_CONSTEXPR QDate(qint64 julianDay) : jd(julianDay) {}
public:
    Q_DECL_CONSTEXPR QDate() : jd(nullJd()) {}
    QDate(int y, int m, int d);
    QDate(int y, int m, int d, QCalendar cal);

    Q_DECL_CONSTEXPR bool isNull() const { return !isValid(); }
    Q_DECL_CONSTEXPR bool isValid() const { return jd >= minJd() && jd <= maxJd(); }

    int year() const;
    int month() const;
    int day() const;
    int dayOfWeek() const;
    int dayOfYear() const;
    int daysInMonth() const;
    int daysInYear() const;
    int weekNumber(int *yearNum = nullptr) const;

    int year(QCalendar cal) const;
    int month(QCalendar cal) const;
    int day(QCalendar cal) const;
    int dayOfWeek(QCalendar cal) const;
    int dayOfYear(QCalendar cal) const;
    int daysInMonth(QCalendar cal) const;
    int daysInYear(QCalendar cal) const;

    QDateTime startOfDay(Qt::TimeSpec spec = Qt::LocalTime, int offsetSeconds = 0) const;
    QDateTime endOfDay(Qt::TimeSpec spec = Qt::LocalTime, int offsetSeconds = 0) const;
#if QT_CONFIG(timezone)
    QDateTime startOfDay(const QTimeZone &zone) const;
    QDateTime endOfDay(const QTimeZone &zone) const;
#endif

#if QT_DEPRECATED_SINCE(5, 10) && QT_CONFIG(textdate)
    QT_DEPRECATED_X("Use QLocale::monthName or QLocale::standaloneMonthName")
        static QString shortMonthName(int month, MonthNameType type = DateFormat);
    QT_DEPRECATED_X("Use QLocale::dayName or QLocale::standaloneDayName")
        static QString shortDayName(int weekday, MonthNameType type = DateFormat);
    QT_DEPRECATED_X("Use QLocale::monthName or QLocale::standaloneMonthName")
        static QString longMonthName(int month, MonthNameType type = DateFormat);
    QT_DEPRECATED_X("Use QLocale::dayName or QLocale::standaloneDayName")
        static QString longDayName(int weekday, MonthNameType type = DateFormat);
#endif // textdate && deprecated
#if QT_CONFIG(datestring)
    QString toString(Qt::DateFormat format = Qt::TextDate) const;
    QString toString(Qt::DateFormat format, QCalendar cal) const;

#if QT_STRINGVIEW_LEVEL < 2
    QString toString(const QString &format) const;
    QString toString(const QString &format, QCalendar cal) const;
#endif

    QString toString(QStringView format) const;
    QString toString(QStringView format, QCalendar cal) const;
#endif
#if QT_DEPRECATED_SINCE(5,0)
    QT_DEPRECATED_X("Use setDate() instead") inline bool setYMD(int y, int m, int d)
    { if (uint(y) <= 99) y += 1900; return setDate(y, m, d); }
#endif

    bool setDate(int year, int month, int day);
    bool setDate(int year, int month, int day, QCalendar cal);

#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
    void getDate(int *year, int *month, int *day); // ### Qt 6: remove
#endif // < Qt 6
    void getDate(int *year, int *month, int *day) const;

    Q_REQUIRED_RESULT QDate addDays(qint64 days) const;
    Q_REQUIRED_RESULT QDate addMonths(int months) const;
    Q_REQUIRED_RESULT QDate addYears(int years) const;
    Q_REQUIRED_RESULT QDate addMonths(int months, QCalendar cal) const;
    Q_REQUIRED_RESULT QDate addYears(int years, QCalendar cal) const;
    qint64 daysTo(const QDate &) const; // ### Qt 6: QDate

    Q_DECL_CONSTEXPR bool operator==(const QDate &other) const { return jd == other.jd; }
    Q_DECL_CONSTEXPR bool operator!=(const QDate &other) const { return jd != other.jd; }
    Q_DECL_CONSTEXPR bool operator< (const QDate &other) const { return jd <  other.jd; }
    Q_DECL_CONSTEXPR bool operator<=(const QDate &other) const { return jd <= other.jd; }
    Q_DECL_CONSTEXPR bool operator> (const QDate &other) const { return jd >  other.jd; }
    Q_DECL_CONSTEXPR bool operator>=(const QDate &other) const { return jd >= other.jd; }

    static QDate currentDate();
#if QT_CONFIG(datestring)
    static QDate fromString(const QString &s, Qt::DateFormat f = Qt::TextDate);
    static QDate fromString(const QString &s, const QString &format);
    static QDate fromString(const QString &s, const QString &format, QCalendar cal);
#endif
    static bool isValid(int y, int m, int d);
    static bool isLeapYear(int year);

    static Q_DECL_CONSTEXPR inline QDate fromJulianDay(qint64 jd_)
    { return jd_ >= minJd() && jd_ <= maxJd() ? QDate(jd_) : QDate() ; }
    Q_DECL_CONSTEXPR inline qint64 toJulianDay() const { return jd; }

private:
    // using extra parentheses around min to avoid expanding it if it is a macro
    static Q_DECL_CONSTEXPR inline qint64 nullJd() { return (std::numeric_limits<qint64>::min)(); }
    static Q_DECL_CONSTEXPR inline qint64 minJd() { return Q_INT64_C(-784350574879); }
    static Q_DECL_CONSTEXPR inline qint64 maxJd() { return Q_INT64_C( 784354017364); }

    qint64 jd;

    friend class QDateTime;
    friend class QDateTimePrivate;
#ifndef QT_NO_DATASTREAM
    friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QDate &);
    friend Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QDate &);
#endif
};
Q_DECLARE_TYPEINFO(QDate, Q_MOVABLE_TYPE);

class Q_CORE_EXPORT QTime // ### Qt 6: change to be used by value, not const &
{
    explicit Q_DECL_CONSTEXPR QTime(int ms) : mds(ms)
    {}
public:
    Q_DECL_CONSTEXPR QTime(): mds(NullTime)
    {}
    QTime(int h, int m, int s = 0, int ms = 0);

    Q_DECL_CONSTEXPR bool isNull() const { return mds == NullTime; }
    bool isValid() const;

    int hour() const;
    int minute() const;
    int second() const;
    int msec() const;
#if QT_CONFIG(datestring)
    QString toString(Qt::DateFormat f = Qt::TextDate) const;
#if QT_STRINGVIEW_LEVEL < 2
    QString toString(const QString &format) const;
#endif
    QString toString(QStringView format) const;
#endif
    bool setHMS(int h, int m, int s, int ms = 0);

    Q_REQUIRED_RESULT QTime addSecs(int secs) const;
    int secsTo(const QTime &) const; // ### Qt 6: plain QTime
    Q_REQUIRED_RESULT QTime addMSecs(int ms) const;
    int msecsTo(const QTime &) const; // ### Qt 6: plain QTime

    Q_DECL_CONSTEXPR bool operator==(const QTime &other) const { return mds == other.mds; }
    Q_DECL_CONSTEXPR bool operator!=(const QTime &other) const { return mds != other.mds; }
    Q_DECL_CONSTEXPR bool operator< (const QTime &other) const { return mds <  other.mds; }
    Q_DECL_CONSTEXPR bool operator<=(const QTime &other) const { return mds <= other.mds; }
    Q_DECL_CONSTEXPR bool operator> (const QTime &other) const { return mds >  other.mds; }
    Q_DECL_CONSTEXPR bool operator>=(const QTime &other) const { return mds >= other.mds; }

    static Q_DECL_CONSTEXPR inline QTime fromMSecsSinceStartOfDay(int msecs) { return QTime(msecs); }
    Q_DECL_CONSTEXPR inline int msecsSinceStartOfDay() const { return mds == NullTime ? 0 : mds; }

    static QTime currentTime();
#if QT_CONFIG(datestring)
    static QTime fromString(const QString &s, Qt::DateFormat f = Qt::TextDate);
    static QTime fromString(const QString &s, const QString &format);
#endif
    static bool isValid(int h, int m, int s, int ms = 0);

#if QT_DEPRECATED_SINCE(5, 14) // ### Qt 6: remove
    QT_DEPRECATED_X("Use QElapsedTimer instead") void start();
    QT_DEPRECATED_X("Use QElapsedTimer instead") int restart();
    QT_DEPRECATED_X("Use QElapsedTimer instead") int elapsed() const;
#endif
private:
    enum TimeFlag { NullTime = -1 };
    Q_DECL_CONSTEXPR inline int ds() const { return mds == -1 ? 0 : mds; }
    int mds;

    friend class QDateTime;
    friend class QDateTimePrivate;
#ifndef QT_NO_DATASTREAM // ### Qt 6: plain QTime
    friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QTime &);
    friend Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QTime &);
#endif
};
Q_DECLARE_TYPEINFO(QTime, Q_MOVABLE_TYPE);

class QDateTimePrivate;

class Q_CORE_EXPORT QDateTime
{
    // ### Qt 6: revisit the optimization
    struct ShortData {
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
        quintptr status : 8;
#endif
        // note: this is only 24 bits on 32-bit systems...
        qintptr msecs : sizeof(void *) * 8 - 8;

#if Q_BYTE_ORDER == Q_BIG_ENDIAN
        quintptr status : 8;
#endif
    };

    union Data {
        enum {
            // To be of any use, we need at least 60 years around 1970, which
            // is 1,893,456,000,000 ms. That requires 41 bits to store, plus
            // the sign bit. With the status byte, the minimum size is 50 bits.
            CanBeSmall = sizeof(ShortData) * 8 > 50
        };

        Data();
        Data(Qt::TimeSpec);
        Data(const Data &other);
        Data(Data &&other);
        Data &operator=(const Data &other);
        ~Data();

        bool isShort() const;
        void detach();

        const QDateTimePrivate *operator->() const;
        QDateTimePrivate *operator->();

        QDateTimePrivate *d;
        ShortData data;
    };

public:
    QDateTime() noexcept(Data::CanBeSmall);
#if QT_DEPRECATED_SINCE(5, 15) // ### Qt 6: remove
    QT_DEPRECATED_X("Use QDate::startOfDay()") explicit QDateTime(const QDate &);
#endif
    QDateTime(const QDate &, const QTime &, Qt::TimeSpec spec = Qt::LocalTime);
    // ### Qt 6: Merge with above with default offsetSeconds = 0
    QDateTime(const QDate &date, const QTime &time, Qt::TimeSpec spec, int offsetSeconds);
#if QT_CONFIG(timezone)
    QDateTime(const QDate &date, const QTime &time, const QTimeZone &timeZone);
#endif // timezone
    QDateTime(const QDateTime &other) noexcept;
    QDateTime(QDateTime &&other) noexcept;
    ~QDateTime();

    QDateTime &operator=(QDateTime &&other) noexcept { swap(other); return *this; }
    QDateTime &operator=(const QDateTime &other) noexcept;

    void swap(QDateTime &other) noexcept { qSwap(d.d, other.d.d); }

    bool isNull() const;
    bool isValid() const;

    QDate date() const;
    QTime time() const;
    Qt::TimeSpec timeSpec() const;
    int offsetFromUtc() const;
#if QT_CONFIG(timezone)
    QTimeZone timeZone() const;
#endif // timezone
    QString timeZoneAbbreviation() const;
    bool isDaylightTime() const;

    qint64 toMSecsSinceEpoch() const;
    qint64 toSecsSinceEpoch() const;

    void setDate(const QDate &date); // ### Qt 6: plain QDate
    void setTime(const QTime &time);
    void setTimeSpec(Qt::TimeSpec spec);
    void setOffsetFromUtc(int offsetSeconds);
#if QT_CONFIG(timezone)
    void setTimeZone(const QTimeZone &toZone);
#endif // timezone
    void setMSecsSinceEpoch(qint64 msecs);
    void setSecsSinceEpoch(qint64 secs);

#if QT_CONFIG(datestring)
    QString toString(Qt::DateFormat format = Qt::TextDate) const;
    QString toString(Qt::DateFormat format, QCalendar cal) const;
#if QT_STRINGVIEW_LEVEL < 2
    QString toString(const QString &format) const;
    QString toString(const QString &format, QCalendar cal) const;
#endif
    QString toString(QStringView format) const;
    QString toString(QStringView format, QCalendar cal) const;
#endif
    Q_REQUIRED_RESULT QDateTime addDays(qint64 days) const;
    Q_REQUIRED_RESULT QDateTime addMonths(int months) const;
    Q_REQUIRED_RESULT QDateTime addYears(int years) const;
    Q_REQUIRED_RESULT QDateTime addSecs(qint64 secs) const;
    Q_REQUIRED_RESULT QDateTime addMSecs(qint64 msecs) const;

    QDateTime toTimeSpec(Qt::TimeSpec spec) const;
    inline QDateTime toLocalTime() const { return toTimeSpec(Qt::LocalTime); }
    inline QDateTime toUTC() const { return toTimeSpec(Qt::UTC); }
    QDateTime toOffsetFromUtc(int offsetSeconds) const;
#if QT_CONFIG(timezone)
    QDateTime toTimeZone(const QTimeZone &toZone) const;
#endif // timezone

    qint64 daysTo(const QDateTime &) const;
    qint64 secsTo(const QDateTime &) const;
    qint64 msecsTo(const QDateTime &) const;

    bool operator==(const QDateTime &other) const;
    inline bool operator!=(const QDateTime &other) const { return !(*this == other); }
    bool operator<(const QDateTime &other) const;
    inline bool operator<=(const QDateTime &other) const { return !(other < *this); }
    inline bool operator>(const QDateTime &other) const { return other < *this; }
    inline bool operator>=(const QDateTime &other) const { return !(*this < other); }

#if QT_DEPRECATED_SINCE(5, 2) // ### Qt 6: remove
    QT_DEPRECATED_X("Use setOffsetFromUtc() instead") void setUtcOffset(int seconds);
    QT_DEPRECATED_X("Use offsetFromUtc() instead") int utcOffset() const;
#endif // QT_DEPRECATED_SINCE

    static QDateTime currentDateTime();
    static QDateTime currentDateTimeUtc();
#if QT_CONFIG(datestring)
    static QDateTime fromString(const QString &s, Qt::DateFormat f = Qt::TextDate);
    static QDateTime fromString(const QString &s, const QString &format);
    static QDateTime fromString(const QString &s, const QString &format, QCalendar cal);
#endif

#if QT_DEPRECATED_SINCE(5, 8)
    uint toTime_t() const;
    void setTime_t(uint secsSince1Jan1970UTC);
    static QDateTime fromTime_t(uint secsSince1Jan1970UTC);
    static QDateTime fromTime_t(uint secsSince1Jan1970UTC, Qt::TimeSpec spec,
                                int offsetFromUtc = 0);
    static QDateTime fromTime_t(uint secsSince1Jan1970UTC, const QTimeZone &timeZone);
#endif

    static QDateTime fromMSecsSinceEpoch(qint64 msecs);
    // ### Qt 6: Merge with above with default spec = Qt::LocalTime
    static QDateTime fromMSecsSinceEpoch(qint64 msecs, Qt::TimeSpec spec, int offsetFromUtc = 0);
    static QDateTime fromSecsSinceEpoch(qint64 secs, Qt::TimeSpec spe = Qt::LocalTime, int offsetFromUtc = 0);

#if QT_CONFIG(timezone)
    static QDateTime fromMSecsSinceEpoch(qint64 msecs, const QTimeZone &timeZone);
    static QDateTime fromSecsSinceEpoch(qint64 secs, const QTimeZone &timeZone);
#endif

    static qint64 currentMSecsSinceEpoch() noexcept;
    static qint64 currentSecsSinceEpoch() noexcept;

#if defined(Q_OS_DARWIN) || defined(Q_QDOC)
    static QDateTime fromCFDate(CFDateRef date);
    CFDateRef toCFDate() const Q_DECL_CF_RETURNS_RETAINED;
    static QDateTime fromNSDate(const NSDate *date);
    NSDate *toNSDate() const Q_DECL_NS_RETURNS_AUTORELEASED;
#endif

    // (1<<63) ms is 292277024.6 (average Gregorian) years, counted from the start of 1970, so
    // Last is floor(1970 + 292277024.6); no year 0, so First is floor(1970 - 1 - 292277024.6)
    enum class YearRange : qint32 { First = -292275056,  Last = +292278994 };

private:
    friend class QDateTimePrivate;

    Data d;

#ifndef QT_NO_DATASTREAM
    friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QDateTime &);
    friend Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QDateTime &);
#endif

#if !defined(QT_NO_DEBUG_STREAM) && QT_CONFIG(datestring)
    friend Q_CORE_EXPORT QDebug operator<<(QDebug, const QDateTime &);
#endif
};
Q_DECLARE_SHARED(QDateTime)

#ifndef QT_NO_DATASTREAM
Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QDate &);
Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QDate &);
Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QTime &);
Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QTime &);
Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QDateTime &);
Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QDateTime &);
#endif // QT_NO_DATASTREAM

#if !defined(QT_NO_DEBUG_STREAM) && QT_CONFIG(datestring)
Q_CORE_EXPORT QDebug operator<<(QDebug, const QDate &);
Q_CORE_EXPORT QDebug operator<<(QDebug, const QTime &);
Q_CORE_EXPORT QDebug operator<<(QDebug, const QDateTime &);
#endif

// QDateTime is not noexcept for now -- to be revised once
// timezone and calendaring support is added
Q_CORE_EXPORT uint qHash(const QDateTime &key, uint seed = 0);
Q_CORE_EXPORT uint qHash(const QDate &key, uint seed = 0) noexcept;
Q_CORE_EXPORT uint qHash(const QTime &key, uint seed = 0) noexcept;

QT_END_NAMESPACE

#endif // QDATETIME_H