Back to home page

EIC code displayed by LXR
 
 

    

Warning, file /include/QtCore/qdatetime.h was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

0001 // Copyright (C) 2021 The Qt Company Ltd.
0002 // Copyright (C) 2021 Intel Corporation.
0003 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
0004 
0005 #ifndef QDATETIME_H
0006 #define QDATETIME_H
0007 
0008 #include <QtCore/qcalendar.h>
0009 #include <QtCore/qcompare.h>
0010 #include <QtCore/qlocale.h>
0011 #include <QtCore/qnamespace.h>
0012 #include <QtCore/qshareddata.h>
0013 #include <QtCore/qstring.h>
0014 
0015 #include <limits>
0016 #include <chrono>
0017 
0018 #if defined(Q_OS_DARWIN) || defined(Q_QDOC)
0019 Q_FORWARD_DECLARE_CF_TYPE(CFDate);
0020 Q_FORWARD_DECLARE_OBJC_CLASS(NSDate);
0021 #endif
0022 
0023 QT_BEGIN_NAMESPACE
0024 
0025 class QTimeZone;
0026 class QDateTime;
0027 
0028 class Q_CORE_EXPORT QDate
0029 {
0030     explicit constexpr QDate(qint64 julianDay) : jd(julianDay) {}
0031 public:
0032     constexpr QDate() : jd(nullJd()) {}
0033     QDate(int y, int m, int d);
0034     QDate(int y, int m, int d, QCalendar cal);
0035 #if __cpp_lib_chrono >= 201907L || defined(Q_QDOC)
0036     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0037     Q_IMPLICIT constexpr QDate(std::chrono::year_month_day date) noexcept
0038         : jd(date.ok() ? stdSysDaysToJulianDay(date QT6_CALL_NEW_OVERLOAD_TAIL) : nullJd())
0039     {}
0040 
0041     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0042     Q_IMPLICIT constexpr QDate(std::chrono::year_month_day_last date) noexcept
0043         : jd(date.ok() ? stdSysDaysToJulianDay(date QT6_CALL_NEW_OVERLOAD_TAIL) : nullJd())
0044     {}
0045 
0046     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0047     Q_IMPLICIT constexpr QDate(std::chrono::year_month_weekday date) noexcept
0048         : jd(date.ok() ? stdSysDaysToJulianDay(date QT6_CALL_NEW_OVERLOAD_TAIL) : nullJd())
0049     {}
0050 
0051     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0052     Q_IMPLICIT constexpr QDate(std::chrono::year_month_weekday_last date) noexcept
0053         : jd(date.ok() ? stdSysDaysToJulianDay(date QT6_CALL_NEW_OVERLOAD_TAIL) : nullJd())
0054     {}
0055 
0056     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0057     static constexpr QDate fromStdSysDays(const std::chrono::sys_days &days) noexcept
0058     {
0059         return QDate(stdSysDaysToJulianDay(days QT6_CALL_NEW_OVERLOAD_TAIL));
0060     }
0061 
0062     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0063     constexpr std::chrono::sys_days toStdSysDays() const noexcept
0064     {
0065         const qint64 days = isValid() ? jd - unixEpochJd() : 0;
0066         return std::chrono::sys_days(std::chrono::days(days));
0067     }
0068 #endif
0069 
0070     constexpr bool isNull() const { return !isValid(); }
0071     constexpr bool isValid() const { return jd >= minJd() && jd <= maxJd(); }
0072 
0073     // Gregorian-optimized:
0074     int year() const;
0075     int month() const;
0076     int day() const;
0077     int dayOfWeek() const;
0078     int dayOfYear() const;
0079     int daysInMonth() const;
0080     int daysInYear() const;
0081     int weekNumber(int *yearNum = nullptr) const; // ISO 8601, always Gregorian
0082 
0083     int year(QCalendar cal) const;
0084     int month(QCalendar cal) const;
0085     int day(QCalendar cal) const;
0086     int dayOfWeek(QCalendar cal) const;
0087     int dayOfYear(QCalendar cal) const;
0088     int daysInMonth(QCalendar cal) const;
0089     int daysInYear(QCalendar cal) const;
0090 
0091 #if QT_DEPRECATED_SINCE(6, 9)
0092     QT_DEPRECATED_VERSION_X_6_9("Pass QTimeZone instead")
0093     QDateTime startOfDay(Qt::TimeSpec spec, int offsetSeconds = 0) const;
0094     QT_DEPRECATED_VERSION_X_6_9("Pass QTimeZone instead")
0095     QDateTime endOfDay(Qt::TimeSpec spec, int offsetSeconds = 0) const;
0096 #endif
0097 
0098     QDateTime startOfDay(const QTimeZone &zone) const;
0099     QDateTime endOfDay(const QTimeZone &zone) const;
0100     QDateTime startOfDay() const;
0101     QDateTime endOfDay() const;
0102 
0103 #if QT_CONFIG(datestring)
0104     QString toString(Qt::DateFormat format = Qt::TextDate) const;
0105     QString toString(const QString &format) const;
0106     QString toString(const QString &format, QCalendar cal) const
0107     { return toString(qToStringViewIgnoringNull(format), cal); }
0108     QString toString(QStringView format) const;
0109     QString toString(QStringView format, QCalendar cal) const;
0110 #endif
0111     bool setDate(int year, int month, int day); // Gregorian-optimized
0112     bool setDate(int year, int month, int day, QCalendar cal);
0113 
0114     void getDate(int *year, int *month, int *day) const;
0115 
0116     [[nodiscard]] QDate addDays(qint64 days) const;
0117 #if __cpp_lib_chrono >= 201907L || defined(Q_QDOC)
0118     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0119     [[nodiscard]] QDate addDuration(std::chrono::days days) const
0120     {
0121         return addDays(days.count());
0122     }
0123 #endif
0124     // Gregorian-optimized:
0125     [[nodiscard]] QDate addMonths(int months) const;
0126     [[nodiscard]] QDate addYears(int years) const;
0127     [[nodiscard]] QDate addMonths(int months, QCalendar cal) const;
0128     [[nodiscard]] QDate addYears(int years, QCalendar cal) const;
0129     qint64 daysTo(QDate d) const;
0130 
0131     static QDate currentDate();
0132 #if QT_CONFIG(datestring)
0133     // No DateFormat accepts a two-digit year, so no need for baseYear:
0134     static QDate fromString(QStringView string, Qt::DateFormat format = Qt::TextDate);
0135     static QDate fromString(const QString &string, Qt::DateFormat format = Qt::TextDate)
0136     { return fromString(qToStringViewIgnoringNull(string), format); }
0137 
0138     // Accept calendar without over-ride of base year:
0139     static QDate fromString(QStringView string, QStringView format, QCalendar cal)
0140     { return fromString(string.toString(), format, QLocale::DefaultTwoDigitBaseYear, cal); }
0141     QT_CORE_INLINE_SINCE(6, 7)
0142     static QDate fromString(const QString &string, QStringView format, QCalendar cal);
0143     static QDate fromString(const QString &string, const QString &format, QCalendar cal)
0144     { return fromString(string, qToStringViewIgnoringNull(format), QLocale::DefaultTwoDigitBaseYear, cal); }
0145 
0146     // Overriding base year is likely more common than overriding calendar (and
0147     // likely to get more so, as the legacy base drops ever further behind us).
0148     static QDate fromString(QStringView string, QStringView format,
0149                             int baseYear = QLocale::DefaultTwoDigitBaseYear)
0150     { return fromString(string.toString(), format, baseYear); }
0151     static QDate fromString(QStringView string, QStringView format,
0152                             int baseYear, QCalendar cal)
0153     { return fromString(string.toString(), format, baseYear, cal); }
0154     static QDate fromString(const QString &string, QStringView format,
0155                             int baseYear = QLocale::DefaultTwoDigitBaseYear);
0156     static QDate fromString(const QString &string, QStringView format,
0157                             int baseYear, QCalendar cal);
0158     static QDate fromString(const QString &string, const QString &format,
0159                             int baseYear = QLocale::DefaultTwoDigitBaseYear)
0160     { return fromString(string, qToStringViewIgnoringNull(format), baseYear); }
0161     static QDate fromString(const QString &string, const QString &format,
0162                             int baseYear, QCalendar cal)
0163     { return fromString(string, qToStringViewIgnoringNull(format), baseYear, cal); }
0164 #endif
0165     static bool isValid(int y, int m, int d);
0166     static bool isLeapYear(int year);
0167 
0168     static constexpr inline QDate fromJulianDay(qint64 jd_)
0169     { return jd_ >= minJd() && jd_ <= maxJd() ? QDate(jd_) : QDate() ; }
0170     constexpr inline qint64 toJulianDay() const { return jd; }
0171 
0172 private:
0173     // using extra parentheses around min to avoid expanding it if it is a macro
0174     static constexpr inline qint64 nullJd() { return (std::numeric_limits<qint64>::min)(); }
0175     static constexpr inline qint64 minJd() { return Q_INT64_C(-784350574879); }
0176     static constexpr inline qint64 maxJd() { return Q_INT64_C( 784354017364); }
0177     static constexpr inline qint64 unixEpochJd() { return Q_INT64_C(2440588); }
0178 
0179 #if __cpp_lib_chrono >= 201907L
0180     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0181     static constexpr qint64
0182     stdSysDaysToJulianDay(const std::chrono::sys_days &days QT6_DECL_NEW_OVERLOAD_TAIL) noexcept
0183     {
0184         const auto epochDays = days.time_since_epoch().count();
0185         // minJd() and maxJd() fit into 40 bits.
0186         if constexpr (sizeof(epochDays) * CHAR_BIT >= 41) {
0187             constexpr auto top = maxJd() - unixEpochJd();
0188             constexpr auto bottom = minJd() - unixEpochJd();
0189             if (epochDays > top || epochDays < bottom)
0190                 return nullJd();
0191         }
0192         return unixEpochJd() + epochDays;
0193     }
0194 
0195 #if QT_VERSION < QT_VERSION_CHECK(7, 0, 0)
0196     static constexpr qint64 stdSysDaysToJulianDay(const std::chrono::sys_days &days) noexcept
0197     {
0198         return stdSysDaysToJulianDay(days QT6_CALL_NEW_OVERLOAD_TAIL);
0199     }
0200 #endif // QT_VERSION < QT_VERSION_CHECK(7, 0, 0)
0201 #endif // __cpp_lib_chrono >= 201907L
0202 
0203     qint64 jd;
0204 
0205     friend class QDateTime;
0206     friend class QDateTimeParser;
0207     friend class QDateTimePrivate;
0208 
0209     friend constexpr bool comparesEqual(const QDate &lhs, const QDate &rhs) noexcept
0210     { return lhs.jd == rhs.jd; }
0211     friend constexpr Qt::strong_ordering
0212     compareThreeWay(const QDate &lhs, const QDate &rhs) noexcept
0213     { return Qt::compareThreeWay(lhs.jd, rhs.jd); }
0214     Q_DECLARE_STRONGLY_ORDERED_LITERAL_TYPE(QDate)
0215 
0216 #ifndef QT_NO_DATASTREAM
0217     friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, QDate);
0218     friend Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QDate &);
0219 #endif
0220 };
0221 Q_DECLARE_TYPEINFO(QDate, Q_RELOCATABLE_TYPE);
0222 
0223 class Q_CORE_EXPORT QTime
0224 {
0225     explicit constexpr QTime(int ms) : mds(ms)
0226     {}
0227 public:
0228     constexpr QTime(): mds(NullTime)
0229     {}
0230     QTime(int h, int m, int s = 0, int ms = 0);
0231 
0232     constexpr bool isNull() const { return mds == NullTime; }
0233     bool isValid() const;
0234 
0235     int hour() const;
0236     int minute() const;
0237     int second() const;
0238     int msec() const;
0239 #if QT_CONFIG(datestring)
0240     QString toString(Qt::DateFormat f = Qt::TextDate) const;
0241     QString toString(const QString &format) const
0242     { return toString(qToStringViewIgnoringNull(format)); }
0243     QString toString(QStringView format) const;
0244 #endif
0245     bool setHMS(int h, int m, int s, int ms = 0);
0246 
0247     [[nodiscard]] QTime addSecs(int secs) const;
0248     int secsTo(QTime t) const;
0249     [[nodiscard]] QTime addMSecs(int ms) const;
0250     int msecsTo(QTime t) const;
0251 
0252     static constexpr inline QTime fromMSecsSinceStartOfDay(int msecs) { return QTime(msecs); }
0253     constexpr inline int msecsSinceStartOfDay() const { return mds == NullTime ? 0 : mds; }
0254 
0255     static QTime currentTime();
0256 #if QT_CONFIG(datestring)
0257     static QTime fromString(QStringView string, Qt::DateFormat format = Qt::TextDate);
0258     static QTime fromString(QStringView string, QStringView format)
0259     { return fromString(string.toString(), format); }
0260     static QTime fromString(const QString &string, QStringView format);
0261     static QTime fromString(const QString &string, Qt::DateFormat format = Qt::TextDate)
0262     { return fromString(qToStringViewIgnoringNull(string), format); }
0263     static QTime fromString(const QString &string, const QString &format)
0264     { return fromString(string, qToStringViewIgnoringNull(format)); }
0265 #endif
0266     static bool isValid(int h, int m, int s, int ms = 0);
0267 
0268 private:
0269     enum TimeFlag { NullTime = -1 };
0270     constexpr inline int ds() const { return mds == -1 ? 0 : mds; }
0271     int mds;
0272 
0273     friend constexpr bool comparesEqual(const QTime &lhs, const QTime &rhs) noexcept
0274     { return lhs.mds == rhs.mds; }
0275     friend constexpr Qt::strong_ordering
0276     compareThreeWay(const QTime &lhs, const QTime &rhs) noexcept
0277     { return Qt::compareThreeWay(lhs.mds, rhs.mds); }
0278     Q_DECLARE_STRONGLY_ORDERED_LITERAL_TYPE(QTime)
0279 
0280     friend class QDateTime;
0281     friend class QDateTimePrivate;
0282 #ifndef QT_NO_DATASTREAM
0283     friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, QTime);
0284     friend Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QTime &);
0285 #endif
0286 };
0287 Q_DECLARE_TYPEINFO(QTime, Q_RELOCATABLE_TYPE);
0288 
0289 class QDateTimePrivate;
0290 
0291 class Q_CORE_EXPORT QDateTime
0292 {
0293     struct ShortData {
0294 #if QT_VERSION >= QT_VERSION_CHECK(7,0,0) || defined(QT_BOOTSTRAPPED)
0295 #  if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
0296         qint64 status : 8;
0297 #  endif
0298         qint64 msecs : 56;
0299 
0300 #  if Q_BYTE_ORDER == Q_BIG_ENDIAN
0301         qint64 status : 8;
0302 #  endif
0303 #else
0304 #  if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
0305         quintptr status : 8;
0306 #  endif
0307         // note: this is only 24 bits on 32-bit systems...
0308         qintptr msecs : sizeof(void *) * 8 - 8;
0309 
0310 #  if Q_BYTE_ORDER == Q_BIG_ENDIAN
0311         quintptr status : 8;
0312 #  endif
0313 #endif
0314         friend constexpr bool operator==(const ShortData &lhs, const ShortData &rhs)
0315         { return lhs.status == rhs.status && lhs.msecs == rhs.msecs; }
0316     };
0317 
0318     union Data {
0319         // To be of any use, we need at least 60 years around 1970, which
0320         // is 1,893,456,000,000 ms. That requires 41 bits to store, plus
0321         // the sign bit. With the status byte, the minimum size is 50 bits.
0322         static constexpr bool CanBeSmall = sizeof(ShortData) * 8 > 50;
0323 
0324         Data() noexcept;
0325         Data(const QTimeZone &);
0326         Data(const Data &other) noexcept;
0327         Data(Data &&other) noexcept;
0328         Data &operator=(const Data &other) noexcept;
0329         Data &operator=(Data &&other) noexcept { swap(other); return *this; }
0330         ~Data();
0331 
0332         void swap(Data &other) noexcept
0333         { std::swap(data, other.data); }
0334 
0335         bool isShort() const;
0336         inline void invalidate();
0337         void detach();
0338         QTimeZone timeZone() const;
0339 
0340         const QDateTimePrivate *operator->() const;
0341         QDateTimePrivate *operator->();
0342 
0343         QDateTimePrivate *d;
0344         ShortData data;
0345     };
0346 
0347 public:
0348     QDateTime() noexcept;
0349 
0350     enum class TransitionResolution {
0351         Reject = 0,
0352         RelativeToBefore,
0353         RelativeToAfter,
0354         PreferBefore,
0355         PreferAfter,
0356         PreferStandard,
0357         PreferDaylightSaving,
0358         // Closest match to behavior prior to introducing TransitionResolution:
0359         LegacyBehavior = RelativeToBefore
0360     };
0361 
0362 #if QT_DEPRECATED_SINCE(6, 9)
0363     QT_DEPRECATED_VERSION_X_6_9("Pass QTimeZone instead")
0364     QDateTime(QDate date, QTime time, Qt::TimeSpec spec, int offsetSeconds = 0);
0365 #endif
0366 #if QT_CORE_REMOVED_SINCE(6, 7)
0367     QDateTime(QDate date, QTime time, const QTimeZone &timeZone);
0368     QDateTime(QDate date, QTime time);
0369 #endif
0370     QDateTime(QDate date, QTime time, const QTimeZone &timeZone,
0371               TransitionResolution resolve = TransitionResolution::LegacyBehavior);
0372     QDateTime(QDate date, QTime time,
0373               TransitionResolution resolve = TransitionResolution::LegacyBehavior);
0374     QDateTime(const QDateTime &other) noexcept;
0375     QDateTime(QDateTime &&other) noexcept;
0376     ~QDateTime();
0377 
0378     QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_PURE_SWAP(QDateTime)
0379     QDateTime &operator=(const QDateTime &other) noexcept;
0380 
0381     void swap(QDateTime &other) noexcept { d.swap(other.d); }
0382 
0383     bool isNull() const;
0384     bool isValid() const;
0385 
0386     QDate date() const;
0387     QTime time() const;
0388     Qt::TimeSpec timeSpec() const;
0389     int offsetFromUtc() const;
0390     QTimeZone timeRepresentation() const;
0391 #if QT_CONFIG(timezone)
0392     QTimeZone timeZone() const;
0393 #endif // timezone
0394     QString timeZoneAbbreviation() const;
0395     bool isDaylightTime() const;
0396 
0397     qint64 toMSecsSinceEpoch() const;
0398     qint64 toSecsSinceEpoch() const;
0399 
0400 #if QT_CORE_REMOVED_SINCE(6, 7)
0401     void setDate(QDate date);
0402     void setTime(QTime time);
0403 #endif
0404     void setDate(QDate date, TransitionResolution resolve = TransitionResolution::LegacyBehavior);
0405     void setTime(QTime time, TransitionResolution resolve = TransitionResolution::LegacyBehavior);
0406 
0407 #if QT_DEPRECATED_SINCE(6, 9)
0408     QT_DEPRECATED_VERSION_X_6_9("Use setTimeZone() instead")
0409     void setTimeSpec(Qt::TimeSpec spec);
0410     QT_DEPRECATED_VERSION_X_6_9("Use setTimeZone() instead")
0411     void setOffsetFromUtc(int offsetSeconds);
0412 #endif
0413 #if QT_CORE_REMOVED_SINCE(6, 7)
0414     void setTimeZone(const QTimeZone &toZone);
0415 #endif
0416     void setTimeZone(const QTimeZone &toZone,
0417                      TransitionResolution resolve = TransitionResolution::LegacyBehavior);
0418     void setMSecsSinceEpoch(qint64 msecs);
0419     void setSecsSinceEpoch(qint64 secs);
0420 
0421 #if QT_CONFIG(datestring)
0422     QString toString(Qt::DateFormat format = Qt::TextDate) const;
0423     QString toString(const QString &format) const;
0424     QString toString(const QString &format, QCalendar cal) const
0425     { return toString(qToStringViewIgnoringNull(format), cal); }
0426     QString toString(QStringView format) const;
0427     QString toString(QStringView format, QCalendar cal) const;
0428 #endif
0429     [[nodiscard]] QDateTime addDays(qint64 days) const;
0430     [[nodiscard]] QDateTime addMonths(int months) const;
0431     [[nodiscard]] QDateTime addYears(int years) const;
0432     [[nodiscard]] QDateTime addSecs(qint64 secs) const;
0433     [[nodiscard]] QDateTime addMSecs(qint64 msecs) const;
0434     [[nodiscard]] QDateTime addDuration(std::chrono::milliseconds msecs) const
0435     {
0436         return addMSecs(msecs.count());
0437     }
0438 
0439 #if QT_DEPRECATED_SINCE(6, 9)
0440     QT_DEPRECATED_VERSION_X_6_9("Use toTimeZone instead")
0441     QDateTime toTimeSpec(Qt::TimeSpec spec) const;
0442 #endif
0443     QDateTime toLocalTime() const;
0444     QDateTime toUTC() const;
0445     QDateTime toOffsetFromUtc(int offsetSeconds) const;
0446     QDateTime toTimeZone(const QTimeZone &toZone) const;
0447 
0448     qint64 daysTo(const QDateTime &) const;
0449     qint64 secsTo(const QDateTime &) const;
0450     qint64 msecsTo(const QDateTime &) const;
0451 
0452     static QDateTime currentDateTime(const QTimeZone &zone);
0453     static QDateTime currentDateTime();
0454     static QDateTime currentDateTimeUtc();
0455 #if QT_CONFIG(datestring)
0456     // No DateFormat accepts a two-digit year, so no need for baseYear:
0457     static QDateTime fromString(QStringView string, Qt::DateFormat format = Qt::TextDate);
0458     static QDateTime fromString(const QString &string, Qt::DateFormat format = Qt::TextDate)
0459     { return fromString(qToStringViewIgnoringNull(string), format); }
0460 
0461     // Accept calendar without over-ride of base year:
0462     static QDateTime fromString(QStringView string, QStringView format, QCalendar cal)
0463     { return fromString(string.toString(), format, QLocale::DefaultTwoDigitBaseYear, cal); }
0464     QT_CORE_INLINE_SINCE(6, 7)
0465     static QDateTime fromString(const QString &string, QStringView format, QCalendar cal);
0466     static QDateTime fromString(const QString &string, const QString &format, QCalendar cal)
0467     { return fromString(string, qToStringViewIgnoringNull(format), QLocale::DefaultTwoDigitBaseYear, cal); }
0468 
0469     // Overriding base year is likely more common than overriding calendar (and
0470     // likely to get more so, as the legacy base drops ever further behind us).
0471     static QDateTime fromString(QStringView string, QStringView format,
0472                                 int baseYear = QLocale::DefaultTwoDigitBaseYear)
0473     { return fromString(string.toString(), format, baseYear); }
0474     static QDateTime fromString(QStringView string, QStringView format,
0475                                 int baseYear, QCalendar cal)
0476     { return fromString(string.toString(), format, baseYear, cal); }
0477     static QDateTime fromString(const QString &string, QStringView format,
0478                                 int baseYear = QLocale::DefaultTwoDigitBaseYear);
0479     static QDateTime fromString(const QString &string, QStringView format,
0480                                 int baseYear, QCalendar cal);
0481     static QDateTime fromString(const QString &string, const QString &format,
0482                                 int baseYear = QLocale::DefaultTwoDigitBaseYear)
0483     { return fromString(string, qToStringViewIgnoringNull(format), baseYear); }
0484     static QDateTime fromString(const QString &string, const QString &format,
0485                                 int baseYear, QCalendar cal)
0486     { return fromString(string, qToStringViewIgnoringNull(format), baseYear, cal); }
0487 #endif
0488 
0489 #if QT_DEPRECATED_SINCE(6, 9)
0490     QT_DEPRECATED_VERSION_X_6_9("Pass QTimeZone instead of time-spec, offset")
0491     static QDateTime fromMSecsSinceEpoch(qint64 msecs, Qt::TimeSpec spec, int offsetFromUtc = 0);
0492     QT_DEPRECATED_VERSION_X_6_9("Pass QTimeZone instead of time-spec, offset")
0493     static QDateTime fromSecsSinceEpoch(qint64 secs, Qt::TimeSpec spec, int offsetFromUtc = 0);
0494 #endif
0495 
0496     static QDateTime fromMSecsSinceEpoch(qint64 msecs, const QTimeZone &timeZone);
0497     static QDateTime fromSecsSinceEpoch(qint64 secs, const QTimeZone &timeZone);
0498     static QDateTime fromMSecsSinceEpoch(qint64 msecs);
0499     static QDateTime fromSecsSinceEpoch(qint64 secs);
0500 
0501     static qint64 currentMSecsSinceEpoch() noexcept;
0502     static qint64 currentSecsSinceEpoch() noexcept;
0503 
0504 #if defined(Q_OS_DARWIN) || defined(Q_QDOC)
0505     static QDateTime fromCFDate(CFDateRef date);
0506     CFDateRef toCFDate() const Q_DECL_CF_RETURNS_RETAINED;
0507     static QDateTime fromNSDate(const NSDate *date);
0508     NSDate *toNSDate() const Q_DECL_NS_RETURNS_AUTORELEASED;
0509 #endif
0510 
0511     static QDateTime fromStdTimePoint(
0512         std::chrono::time_point<
0513             std::chrono::system_clock,
0514             std::chrono::milliseconds
0515         > time
0516     );
0517 
0518 #if __cpp_lib_chrono >= 201907L || defined(Q_QDOC)
0519 #if __cpp_concepts >= 201907L || defined(Q_QDOC)
0520 private:
0521     // The duration type of the result of a clock_cast<system_clock>.
0522     // This duration may differ from the duration of the input.
0523     template <typename Clock, typename Duration>
0524     using system_clock_cast_duration = decltype(
0525         std::chrono::clock_cast<std::chrono::system_clock>(
0526             std::declval<const std::chrono::time_point<Clock, Duration> &>()
0527         ).time_since_epoch()
0528     );
0529 
0530 public:
0531     // Generic clock, as long as it's compatible with us (= system_clock)
0532     template <typename Clock, typename Duration>
0533     static QDateTime fromStdTimePoint(const std::chrono::time_point<Clock, Duration> &time)
0534         requires
0535             requires(const std::chrono::time_point<Clock, Duration> &t) {
0536                 // the clock can be converted to system_clock
0537                 std::chrono::clock_cast<std::chrono::system_clock>(t);
0538                 // after the conversion to system_clock, the duration type
0539                 // we get is convertible to milliseconds
0540                 requires std::is_convertible_v<
0541                     system_clock_cast_duration<Clock, Duration>,
0542                     std::chrono::milliseconds
0543                 >;
0544             }
0545     {
0546         const auto sysTime = std::chrono::clock_cast<std::chrono::system_clock>(time);
0547         // clock_cast can change the duration, so convert it again to milliseconds
0548         const auto timeInMSec = std::chrono::time_point_cast<std::chrono::milliseconds>(sysTime);
0549         return fromStdTimePoint(timeInMSec);
0550     }
0551 #endif // __cpp_concepts
0552 
0553     // local_time
0554     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0555     static QDateTime fromStdTimePoint(const std::chrono::local_time<std::chrono::milliseconds> &time)
0556     {
0557         return fromStdLocalTime(time);
0558     }
0559 
0560     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0561     static QDateTime fromStdLocalTime(const std::chrono::local_time<std::chrono::milliseconds> &time)
0562     {
0563         QDateTime result(QDate(1970, 1, 1), QTime(0, 0, 0), TransitionResolution::LegacyBehavior);
0564         return result.addMSecs(time.time_since_epoch().count());
0565     }
0566 
0567 #if QT_CONFIG(timezone) && (__cpp_lib_chrono >= 201907L || defined(Q_QDOC))
0568     // zoned_time. defined in qtimezone.h
0569     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0570     static QDateTime fromStdZonedTime(const std::chrono::zoned_time<
0571                                           std::chrono::milliseconds,
0572                                           const std::chrono::time_zone *
0573                                       > &time);
0574 #endif // QT_CONFIG(timezone)
0575 
0576     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0577     std::chrono::sys_time<std::chrono::milliseconds> toStdSysMilliseconds() const
0578     {
0579         const std::chrono::milliseconds duration(toMSecsSinceEpoch());
0580         return std::chrono::sys_time<std::chrono::milliseconds>(duration);
0581     }
0582 
0583     QT_POST_CXX17_API_IN_EXPORTED_CLASS
0584     std::chrono::sys_seconds toStdSysSeconds() const
0585     {
0586         const std::chrono::seconds duration(toSecsSinceEpoch());
0587         return std::chrono::sys_seconds(duration);
0588     }
0589 #endif // __cpp_lib_chrono >= 201907L
0590 
0591     friend std::chrono::milliseconds operator-(const QDateTime &lhs, const QDateTime &rhs)
0592     {
0593         return std::chrono::milliseconds(rhs.msecsTo(lhs));
0594     }
0595 
0596     friend QDateTime operator+(const QDateTime &dateTime, std::chrono::milliseconds duration)
0597     {
0598         return dateTime.addMSecs(duration.count());
0599     }
0600 
0601     friend QDateTime operator+(std::chrono::milliseconds duration, const QDateTime &dateTime)
0602     {
0603         return dateTime + duration;
0604     }
0605 
0606     QDateTime &operator+=(std::chrono::milliseconds duration)
0607     {
0608         *this = addMSecs(duration.count());
0609         return *this;
0610     }
0611 
0612     friend QDateTime operator-(const QDateTime &dateTime, std::chrono::milliseconds duration)
0613     {
0614         return dateTime.addMSecs(-duration.count());
0615     }
0616 
0617     QDateTime &operator-=(std::chrono::milliseconds duration)
0618     {
0619         *this = addMSecs(-duration.count());
0620         return *this;
0621     }
0622 
0623     // (1<<63) ms is 292277024.6 (average Gregorian) years, counted from the start of 1970, so
0624     // Last is floor(1970 + 292277024.6); no year 0, so First is floor(1970 - 1 - 292277024.6)
0625     enum class YearRange : qint32 { First = -292275056,  Last = +292278994 };
0626 
0627 private:
0628     bool equals(const QDateTime &other) const;
0629 #if QT_CORE_REMOVED_SINCE(6, 7)
0630     bool precedes(const QDateTime &other) const;
0631 #endif
0632     friend class QDateTimePrivate;
0633 
0634     Data d;
0635 
0636     friend bool comparesEqual(const QDateTime &lhs, const QDateTime &rhs)
0637     { return lhs.equals(rhs); }
0638     friend Q_CORE_EXPORT Qt::weak_ordering
0639     compareThreeWay(const QDateTime &lhs, const QDateTime &rhs);
0640     Q_DECLARE_WEAKLY_ORDERED(QDateTime)
0641 
0642 #ifndef QT_NO_DATASTREAM
0643     friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QDateTime &);
0644     friend Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QDateTime &);
0645 #endif
0646 
0647 #if !defined(QT_NO_DEBUG_STREAM) && QT_CONFIG(datestring)
0648     friend Q_CORE_EXPORT QDebug operator<<(QDebug, const QDateTime &);
0649 #endif
0650 };
0651 Q_DECLARE_SHARED(QDateTime)
0652 
0653 #ifndef QT_NO_DATASTREAM
0654 Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, QDate);
0655 Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QDate &);
0656 Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, QTime);
0657 Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QTime &);
0658 Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QDateTime &);
0659 Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QDateTime &);
0660 #endif // QT_NO_DATASTREAM
0661 
0662 #if !defined(QT_NO_DEBUG_STREAM) && QT_CONFIG(datestring)
0663 Q_CORE_EXPORT QDebug operator<<(QDebug, QDate);
0664 Q_CORE_EXPORT QDebug operator<<(QDebug, QTime);
0665 Q_CORE_EXPORT QDebug operator<<(QDebug, const QDateTime &);
0666 #endif
0667 
0668 // QDateTime is not noexcept for now -- to be revised once
0669 // timezone and calendaring support is added
0670 Q_CORE_EXPORT size_t qHash(const QDateTime &key, size_t seed = 0);
0671 Q_CORE_EXPORT size_t qHash(QDate key, size_t seed = 0) noexcept;
0672 Q_CORE_EXPORT size_t qHash(QTime key, size_t seed = 0) noexcept;
0673 
0674 #if QT_CONFIG(datestring) && QT_CORE_INLINE_IMPL_SINCE(6, 7)
0675 QDate QDate::fromString(const QString &string, QStringView format, QCalendar cal)
0676 {
0677     return fromString(string, format, QLocale::DefaultTwoDigitBaseYear, cal);
0678 }
0679 
0680 QDateTime QDateTime::fromString(const QString &string, QStringView format, QCalendar cal)
0681 {
0682     return fromString(string, format, QLocale::DefaultTwoDigitBaseYear, cal);
0683 }
0684 #endif
0685 
0686 QT_END_NAMESPACE
0687 
0688 #endif // QDATETIME_H
[ Source navigation ] [ Diff markup ] [ Identifier search ] [ general search ]

This page was automatically generated by the 2.3.7 LXR engine.

The LXR team
Valid CSS 2.1! Valid HTML 4.01!