qt/qtbase/src/corelib/time/qdatetime.h

Revision control

++ // Copyright (C) 2021 The Qt Company Ltd.
++ // Copyright (C) 2021 Intel Corporation.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++ #ifndef QDATETIME_H
++ #define QDATETIME_H
++
++ #include <QtCore/qcalendar.h>
++ #include <QtCore/qcompare.h>
++ #include <QtCore/qlocale.h>
++ #include <QtCore/qnamespace.h>
++ #include <QtCore/qshareddata.h>
++ #include <QtCore/qstring.h>
++
++ #include <climits>
++ #include <chrono>
++
++ #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 QTimeZone;
++ class QDateTime;
++
++ class Q_CORE_EXPORT QDate
++ {
++ explicit constexpr QDate(qint64 julianDay) : jd(julianDay) {}
++ public:
++ using difference_type = qint64;
++
++ constexpr QDate() : jd(nullJd()) {}
++ QDate(int y, int m, int d);
++ QDate(int y, int m, int d, QCalendar cal);
++ // INTEGRITY incident-85878 (timezone and clock_cast are not supported)
++ #if (__cpp_lib_chrono >= 201907L && !defined(Q_OS_INTEGRITY)) || defined(Q_QDOC)
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ Q_IMPLICIT constexpr QDate(std::chrono::year_month_day date) noexcept
++ : jd(date.ok() ? stdSysDaysToJulianDay(date) : nullJd())
++ {}
++
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ Q_IMPLICIT constexpr QDate(std::chrono::year_month_day_last date) noexcept
++ : jd(date.ok() ? stdSysDaysToJulianDay(date) : nullJd())
++ {}
++
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ Q_IMPLICIT constexpr QDate(std::chrono::year_month_weekday date) noexcept
++ : jd(date.ok() ? stdSysDaysToJulianDay(date) : nullJd())
++ {}
++
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ Q_IMPLICIT constexpr QDate(std::chrono::year_month_weekday_last date) noexcept
++ : jd(date.ok() ? stdSysDaysToJulianDay(date) : nullJd())
++ {}
++
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ static constexpr QDate fromStdSysDays(const std::chrono::sys_days &days) noexcept
++ {
++ return QDate(stdSysDaysToJulianDay(days));
++ }
++
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ constexpr std::chrono::sys_days toStdSysDays() const noexcept
++ {
++ const qint64 days = isValid() ? jd - unixEpochJd() : 0;
++ return std::chrono::sys_days(std::chrono::days(days));
++ }
++ #endif
++
++ constexpr bool isNull() const { return !isValid(); }
++ constexpr bool isValid() const { return jd >= minJd() && jd <= maxJd(); }
++
++ // Gregorian-optimized:
++ 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; // ISO 8601, always Gregorian
++
++ 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;
++
++ #if QT_DEPRECATED_SINCE(6, 9)
++ QT_DEPRECATED_VERSION_X_6_9("Pass QTimeZone instead")
++ QDateTime startOfDay(Qt::TimeSpec spec, int offsetSeconds = 0) const;
++ QT_DEPRECATED_VERSION_X_6_9("Pass QTimeZone instead")
++ QDateTime endOfDay(Qt::TimeSpec spec, int offsetSeconds = 0) const;
++ #endif
++
++ QDateTime startOfDay(const QTimeZone &zone) const;
++ QDateTime endOfDay(const QTimeZone &zone) const;
++ QDateTime startOfDay() const;
++ QDateTime endOfDay() const;
++
++ #if QT_CONFIG(datestring)
++ QString toString(Qt::DateFormat format = Qt::TextDate) const;
++ QString toString(const QString &format) const;
++ QString toString(const QString &format, QCalendar cal) const
++ { return toString(qToStringViewIgnoringNull(format), cal); }
++ QString toString(QStringView format) const;
++ QString toString(QStringView format, QCalendar cal) const;
++ #endif
++ bool setDate(int year, int month, int day); // Gregorian-optimized
++ bool setDate(int year, int month, int day, QCalendar cal);
++
++ void getDate(int *year, int *month, int *day) const;
++
++ [[nodiscard]] QDate addDays(qint64 days) const;
++ // INTEGRITY incident-85878 (timezone and clock_cast are not supported)
++ #if (__cpp_lib_chrono >= 201907L && !defined(Q_OS_INTEGRITY)) || defined(Q_QDOC)
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ [[nodiscard]] QDate addDuration(std::chrono::days days) const
++ {
++ return addDays(days.count());
++ }
++ #endif
++ // Gregorian-optimized:
++ [[nodiscard]] QDate addMonths(int months) const;
++ [[nodiscard]] QDate addYears(int years) const;
++ [[nodiscard]] QDate addMonths(int months, QCalendar cal) const;
++ [[nodiscard]] QDate addYears(int years, QCalendar cal) const;
++ qint64 daysTo(QDate d) const;
++
++ static QDate currentDate();
++ #if QT_CONFIG(datestring)
++ // No DateFormat accepts a two-digit year, so no need for baseYear:
++ static QDate fromString(QStringView string, Qt::DateFormat format = Qt::TextDate);
++ static QDate fromString(const QString &string, Qt::DateFormat format = Qt::TextDate)
++ { return fromString(qToStringViewIgnoringNull(string), format); }
++
++ // Accept calendar without over-ride of base year:
++ static QDate fromString(QStringView string, QStringView format, QCalendar cal)
++ { return fromString(string.toString(), format, QLocale::DefaultTwoDigitBaseYear, cal); }
++ QT_CORE_INLINE_SINCE(6, 7)
++ static QDate fromString(const QString &string, QStringView format, QCalendar cal);
++ static QDate fromString(const QString &string, const QString &format, QCalendar cal)
++ { return fromString(string, qToStringViewIgnoringNull(format), QLocale::DefaultTwoDigitBaseYear, cal); }
++
++ // Overriding base year is likely more common than overriding calendar (and
++ // likely to get more so, as the legacy base drops ever further behind us).
++ static QDate fromString(QStringView string, QStringView format,
++ int baseYear = QLocale::DefaultTwoDigitBaseYear)
++ { return fromString(string.toString(), format, baseYear); }
++ static QDate fromString(QStringView string, QStringView format,
++ int baseYear, QCalendar cal)
++ { return fromString(string.toString(), format, baseYear, cal); }
++ static QDate fromString(const QString &string, QStringView format,
++ int baseYear = QLocale::DefaultTwoDigitBaseYear);
++ static QDate fromString(const QString &string, QStringView format,
++ int baseYear, QCalendar cal);
++ static QDate fromString(const QString &string, const QString &format,
++ int baseYear = QLocale::DefaultTwoDigitBaseYear)
++ { return fromString(string, qToStringViewIgnoringNull(format), baseYear); }
++ static QDate fromString(const QString &string, const QString &format,
++ int baseYear, QCalendar cal)
++ { return fromString(string, qToStringViewIgnoringNull(format), baseYear, cal); }
++ #endif
++ static bool isValid(int y, int m, int d);
++ static bool isLeapYear(int year);
++
++ static constexpr inline QDate fromJulianDay(qint64 jd_)
++ { return jd_ >= minJd() && jd_ <= maxJd() ? QDate(jd_) : QDate() ; }
++ constexpr inline qint64 toJulianDay() const { return jd; }
++
++ private:
++ // using extra parentheses around min to avoid expanding it if it is a macro
++ static constexpr inline qint64 nullJd() { return (std::numeric_limits<qint64>::min)(); }
++ static constexpr inline qint64 minJd() { return Q_INT64_C(-784350574879); }
++ static constexpr inline qint64 maxJd() { return Q_INT64_C( 784354017364); }
++ static constexpr inline qint64 unixEpochJd() { return Q_INT64_C(2440588); }
++
++ // INTEGRITY incident-85878 (timezone and clock_cast are not supported)
++ #if __cpp_lib_chrono >= 201907L && !defined(Q_OS_INTEGRITY)
++ #if !QT_CORE_REMOVED_SINCE(6, 7)
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ #endif
++ static constexpr qint64
++ stdSysDaysToJulianDay(const std::chrono::sys_days &days) noexcept
++ {
++ const auto epochDays = days.time_since_epoch().count();
++ // minJd() and maxJd() fit into 40 bits.
++ if constexpr (sizeof(epochDays) * CHAR_BIT >= 41) {
++ constexpr auto top = maxJd() - unixEpochJd();
++ constexpr auto bottom = minJd() - unixEpochJd();
++ if (epochDays > top || epochDays < bottom)
++ return nullJd();
++ }
++ return unixEpochJd() + epochDays;
++ }
++ #endif // __cpp_lib_chrono >= 201907L
++
++ qint64 jd;
++
++ friend class QDateTime;
++ friend class QDateTimeParser;
++ friend class QDateTimePrivate;
++
++ friend constexpr bool comparesEqual(const QDate &lhs, const QDate &rhs) noexcept
++ { return lhs.jd == rhs.jd; }
++ friend constexpr Qt::strong_ordering
++ compareThreeWay(const QDate &lhs, const QDate &rhs) noexcept
++ { return Qt::compareThreeWay(lhs.jd, rhs.jd); }
++ Q_DECLARE_STRONGLY_ORDERED_LITERAL_TYPE(QDate)
++
++ friend QDate &operator++(QDate &date)
++ {
++ date = date.addDays(1);
++ return date;
++ }
++
++ friend QDate &operator--(QDate &date)
++ {
++ date = date.addDays(-1);
++ return date;
++ }
++
++ friend QDate operator++(QDate &date, int)
++ {
++ QDate old = date;
++ ++date;
++ return old;
++ }
++
++ friend QDate operator--(QDate &date, int)
++ {
++ QDate old = date;
++ --date;
++ return old;
++ }
++
++ #ifndef QT_NO_DATASTREAM
++ friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, QDate);
++ friend Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QDate &);
++ #endif
++ };
++ Q_DECLARE_TYPEINFO(QDate, Q_RELOCATABLE_TYPE);
++
++ class Q_CORE_EXPORT QTime
++ {
++ explicit constexpr QTime(int ms) : mds(ms)
++ {}
++ public:
++ constexpr QTime(): mds(NullTime)
++ {}
++ QTime(int h, int m, int s = 0, int ms = 0);
++
++ 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;
++ QString toString(const QString &format) const
++ { return toString(qToStringViewIgnoringNull(format)); }
++ QString toString(QStringView format) const;
++ #endif
++ bool setHMS(int h, int m, int s, int ms = 0);
++
++ [[nodiscard]] QTime addSecs(int secs) const;
++ int secsTo(QTime t) const;
++ [[nodiscard]] QTime addMSecs(int ms) const;
++ int msecsTo(QTime t) const;
++
++ static constexpr inline QTime fromMSecsSinceStartOfDay(int msecs) { return QTime(msecs); }
++ constexpr inline int msecsSinceStartOfDay() const { return mds == NullTime ? 0 : mds; }
++
++ static QTime currentTime();
++ #if QT_CONFIG(datestring)
++ static QTime fromString(QStringView string, Qt::DateFormat format = Qt::TextDate);
++ static QTime fromString(QStringView string, QStringView format)
++ { return fromString(string.toString(), format); }
++ static QTime fromString(const QString &string, QStringView format);
++ static QTime fromString(const QString &string, Qt::DateFormat format = Qt::TextDate)
++ { return fromString(qToStringViewIgnoringNull(string), format); }
++ static QTime fromString(const QString &string, const QString &format)
++ { return fromString(string, qToStringViewIgnoringNull(format)); }
++ #endif
++ static bool isValid(int h, int m, int s, int ms = 0);
++
++ private:
++ enum TimeFlag { NullTime = -1 };
++ constexpr inline int ds() const { return mds == -1 ? 0 : mds; }
++ int mds;
++
++ friend constexpr bool comparesEqual(const QTime &lhs, const QTime &rhs) noexcept
++ { return lhs.mds == rhs.mds; }
++ friend constexpr Qt::strong_ordering
++ compareThreeWay(const QTime &lhs, const QTime &rhs) noexcept
++ { return Qt::compareThreeWay(lhs.mds, rhs.mds); }
++ Q_DECLARE_STRONGLY_ORDERED_LITERAL_TYPE(QTime)
++
++ friend class QDateTime;
++ friend class QDateTimePrivate;
++ #ifndef QT_NO_DATASTREAM
++ friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, QTime);
++ friend Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QTime &);
++ #endif
++ };
++ Q_DECLARE_TYPEINFO(QTime, Q_RELOCATABLE_TYPE);
++
++ class QDateTimePrivate;
++
++ class Q_CORE_EXPORT QDateTime
++ {
++ struct ShortData {
++ #if QT_VERSION >= QT_VERSION_CHECK(7,0,0) || defined(QT_BOOTSTRAPPED)
++ # if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
++ qint64 status : 8;
++ # endif
++ qint64 msecs : 56;
++
++ # if Q_BYTE_ORDER == Q_BIG_ENDIAN
++ qint64 status : 8;
++ # endif
++ #else
++ # 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
++ #endif
++ friend constexpr bool operator==(ShortData lhs, ShortData rhs)
++ { return lhs.status == rhs.status && lhs.msecs == rhs.msecs; }
++ };
++
++ union Data {
++ // 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.
++ static constexpr bool CanBeSmall = sizeof(ShortData) * 8 > 50;
++
++ Data() noexcept;
++ Data(const QTimeZone &);
++ Data(const Data &other) noexcept;
++ Data(Data &&other) noexcept;
++ Data &operator=(const Data &other) noexcept;
++ Data &operator=(Data &&other) noexcept { swap(other); return *this; }
++ ~Data();
++
++ void swap(Data &other) noexcept
++ { std::swap(data, other.data); }
++
++ bool isShort() const;
++ inline void invalidate();
++ void detach();
++ QTimeZone timeZone() const;
++
++ const QDateTimePrivate *operator->() const;
++ QDateTimePrivate *operator->();
++
++ QDateTimePrivate *d;
++ ShortData data;
++ };
++
++ friend class QTypeInfo<Data>;
++
++ public:
++ QDateTime() noexcept;
++
++ enum class TransitionResolution {
++ Reject = 0,
++ RelativeToBefore,
++ RelativeToAfter,
++ PreferBefore,
++ PreferAfter,
++ PreferStandard,
++ PreferDaylightSaving,
++ // Closest match to behavior prior to introducing TransitionResolution:
++ LegacyBehavior = RelativeToBefore
++ };
++
++ #if QT_DEPRECATED_SINCE(6, 9)
++ QT_DEPRECATED_VERSION_X_6_9("Pass QTimeZone instead")
++ QDateTime(QDate date, QTime time, Qt::TimeSpec spec, int offsetSeconds = 0);
++ #endif
++ #if QT_CORE_REMOVED_SINCE(6, 7)
++ QDateTime(QDate date, QTime time, const QTimeZone &timeZone);
++ QDateTime(QDate date, QTime time);
++ #endif
++ QDateTime(QDate date, QTime time, const QTimeZone &timeZone,
++ TransitionResolution resolve = TransitionResolution::LegacyBehavior);
++ QDateTime(QDate date, QTime time,
++ TransitionResolution resolve = TransitionResolution::LegacyBehavior);
++ QDateTime(const QDateTime &other) noexcept;
++ QDateTime(QDateTime &&other) noexcept;
++ ~QDateTime();
++
++ QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_PURE_SWAP(QDateTime)
++ QDateTime &operator=(const QDateTime &other) noexcept;
++
++ void swap(QDateTime &other) noexcept { d.swap(other.d); }
++
++ bool isNull() const;
++ bool isValid() const;
++
++ QDate date() const;
++ QTime time() const;
++ Qt::TimeSpec timeSpec() const;
++ int offsetFromUtc() const;
++ QTimeZone timeRepresentation() const;
++ #if QT_CONFIG(timezone)
++ QTimeZone timeZone() const;
++ #endif // timezone
++ QString timeZoneAbbreviation() const;
++ bool isDaylightTime() const;
++
++ qint64 toMSecsSinceEpoch() const;
++ qint64 toSecsSinceEpoch() const;
++
++ #if QT_CORE_REMOVED_SINCE(6, 7)
++ void setDate(QDate date);
++ void setTime(QTime time);
++ #endif
++ void setDate(QDate date, TransitionResolution resolve = TransitionResolution::LegacyBehavior);
++ void setTime(QTime time, TransitionResolution resolve = TransitionResolution::LegacyBehavior);
++
++ #if QT_DEPRECATED_SINCE(6, 9)
++ QT_DEPRECATED_VERSION_X_6_9("Use setTimeZone() instead")
++ void setTimeSpec(Qt::TimeSpec spec);
++ QT_DEPRECATED_VERSION_X_6_9("Use setTimeZone() instead")
++ void setOffsetFromUtc(int offsetSeconds);
++ #endif
++ #if QT_CORE_REMOVED_SINCE(6, 7)
++ void setTimeZone(const QTimeZone &toZone);
++ #endif
++ void setTimeZone(const QTimeZone &toZone,
++ TransitionResolution resolve = TransitionResolution::LegacyBehavior);
++ void setMSecsSinceEpoch(qint64 msecs);
++ void setSecsSinceEpoch(qint64 secs);
++
++ #if QT_CONFIG(datestring)
++ QString toString(Qt::DateFormat format = Qt::TextDate) const;
++ QString toString(const QString &format) const;
++ QString toString(const QString &format, QCalendar cal) const
++ { return toString(qToStringViewIgnoringNull(format), cal); }
++ QString toString(QStringView format) const;
++ QString toString(QStringView format, QCalendar cal) const;
++ #endif
++ [[nodiscard]] QDateTime addDays(qint64 days) const;
++ [[nodiscard]] QDateTime addMonths(int months) const;
++ [[nodiscard]] QDateTime addYears(int years) const;
++ [[nodiscard]] QDateTime addSecs(qint64 secs) const;
++ [[nodiscard]] QDateTime addMSecs(qint64 msecs) const;
++ [[nodiscard]] QDateTime addDuration(std::chrono::milliseconds msecs) const
++ {
++ return addMSecs(msecs.count());
++ }
++
++ #if QT_DEPRECATED_SINCE(6, 9)
++ QT_DEPRECATED_VERSION_X_6_9("Use toTimeZone instead")
++ QDateTime toTimeSpec(Qt::TimeSpec spec) const;
++ #endif
++ QDateTime toLocalTime() const;
++ QDateTime toUTC() const;
++ QDateTime toOffsetFromUtc(int offsetSeconds) const;
++ QDateTime toTimeZone(const QTimeZone &toZone) const;
++
++ qint64 daysTo(const QDateTime &) const;
++ qint64 secsTo(const QDateTime &) const;
++ qint64 msecsTo(const QDateTime &) const;
++
++ static QDateTime currentDateTime(const QTimeZone &zone);
++ static QDateTime currentDateTime();
++ static QDateTime currentDateTimeUtc();
++ #if QT_CONFIG(datestring)
++ // No DateFormat accepts a two-digit year, so no need for baseYear:
++ static QDateTime fromString(QStringView string, Qt::DateFormat format = Qt::TextDate);
++ static QDateTime fromString(const QString &string, Qt::DateFormat format = Qt::TextDate)
++ { return fromString(qToStringViewIgnoringNull(string), format); }
++
++ // Accept calendar without over-ride of base year:
++ static QDateTime fromString(QStringView string, QStringView format, QCalendar cal)
++ { return fromString(string.toString(), format, QLocale::DefaultTwoDigitBaseYear, cal); }
++ QT_CORE_INLINE_SINCE(6, 7)
++ static QDateTime fromString(const QString &string, QStringView format, QCalendar cal);
++ static QDateTime fromString(const QString &string, const QString &format, QCalendar cal)
++ { return fromString(string, qToStringViewIgnoringNull(format), QLocale::DefaultTwoDigitBaseYear, cal); }
++
++ // Overriding base year is likely more common than overriding calendar (and
++ // likely to get more so, as the legacy base drops ever further behind us).
++ static QDateTime fromString(QStringView string, QStringView format,
++ int baseYear = QLocale::DefaultTwoDigitBaseYear)
++ { return fromString(string.toString(), format, baseYear); }
++ static QDateTime fromString(QStringView string, QStringView format,
++ int baseYear, QCalendar cal)
++ { return fromString(string.toString(), format, baseYear, cal); }
++ static QDateTime fromString(const QString &string, QStringView format,
++ int baseYear = QLocale::DefaultTwoDigitBaseYear);
++ static QDateTime fromString(const QString &string, QStringView format,
++ int baseYear, QCalendar cal);
++ static QDateTime fromString(const QString &string, const QString &format,
++ int baseYear = QLocale::DefaultTwoDigitBaseYear)
++ { return fromString(string, qToStringViewIgnoringNull(format), baseYear); }
++ static QDateTime fromString(const QString &string, const QString &format,
++ int baseYear, QCalendar cal)
++ { return fromString(string, qToStringViewIgnoringNull(format), baseYear, cal); }
++ #endif
++
++ #if QT_DEPRECATED_SINCE(6, 9)
++ QT_DEPRECATED_VERSION_X_6_9("Pass QTimeZone instead of time-spec, offset")
++ static QDateTime fromMSecsSinceEpoch(qint64 msecs, Qt::TimeSpec spec, int offsetFromUtc = 0);
++ QT_DEPRECATED_VERSION_X_6_9("Pass QTimeZone instead of time-spec, offset")
++ static QDateTime fromSecsSinceEpoch(qint64 secs, Qt::TimeSpec spec, int offsetFromUtc = 0);
++ #endif
++
++ static QDateTime fromMSecsSinceEpoch(qint64 msecs, const QTimeZone &timeZone);
++ static QDateTime fromSecsSinceEpoch(qint64 secs, const QTimeZone &timeZone);
++ static QDateTime fromMSecsSinceEpoch(qint64 msecs);
++ static QDateTime fromSecsSinceEpoch(qint64 secs);
++
++ 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
++
++ static QDateTime fromStdTimePoint(
++ std::chrono::time_point<
++ std::chrono::system_clock,
++ std::chrono::milliseconds
++ > time
++ );
++
++ // INTEGRITY incident-85878 (timezone and clock_cast are not supported)
++ #if (__cpp_lib_chrono >= 201907L && !defined(Q_OS_INTEGRITY)) || defined(Q_QDOC)
++ #if __cpp_concepts >= 201907L || defined(Q_QDOC)
++ private:
++ // The duration type of the result of a clock_cast<system_clock>.
++ // This duration may differ from the duration of the input.
++ template <typename Clock, typename Duration>
++ using system_clock_cast_duration = decltype(
++ std::chrono::clock_cast<std::chrono::system_clock>(
++ std::declval<const std::chrono::time_point<Clock, Duration> &>()
++ ).time_since_epoch()
++ );
++
++ public:
++ // Generic clock, as long as it's compatible with us (= system_clock)
++ template <typename Clock, typename Duration>
++ static QDateTime fromStdTimePoint(const std::chrono::time_point<Clock, Duration> &time)
++ requires
++ requires(const std::chrono::time_point<Clock, Duration> &t) {
++ // the clock can be converted to system_clock
++ std::chrono::clock_cast<std::chrono::system_clock>(t);
++ // after the conversion to system_clock, the duration type
++ // we get is convertible to milliseconds
++ requires std::is_convertible_v<
++ system_clock_cast_duration<Clock, Duration>,
++ std::chrono::milliseconds
++ >;
++ }
++ {
++ using namespace std::chrono;
++ const sys_time<milliseconds> sysTime = clock_cast<system_clock>(time);
++ return fromStdTimePoint(sysTime);
++ }
++ #endif // __cpp_concepts
++
++ // local_time
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ static QDateTime fromStdTimePoint(const std::chrono::local_time<std::chrono::milliseconds> &time)
++ {
++ return fromStdLocalTime(time);
++ }
++
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ static QDateTime fromStdLocalTime(const std::chrono::local_time<std::chrono::milliseconds> &time)
++ {
++ QDateTime result(QDate(1970, 1, 1), QTime(0, 0, 0), TransitionResolution::LegacyBehavior);
++ return result.addMSecs(time.time_since_epoch().count());
++ }
++
++ #if QT_CONFIG(timezone) && (__cpp_lib_chrono >= 201907L || defined(Q_QDOC))
++ // zoned_time. defined in qtimezone.h
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ static QDateTime fromStdZonedTime(const std::chrono::zoned_time<
++ std::chrono::milliseconds,
++ const std::chrono::time_zone *
++ > &time);
++ #endif // QT_CONFIG(timezone)
++
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ std::chrono::sys_time<std::chrono::milliseconds> toStdSysMilliseconds() const
++ {
++ const std::chrono::milliseconds duration(toMSecsSinceEpoch());
++ return std::chrono::sys_time<std::chrono::milliseconds>(duration);
++ }
++
++ QT_POST_CXX17_API_IN_EXPORTED_CLASS
++ std::chrono::sys_seconds toStdSysSeconds() const
++ {
++ const std::chrono::seconds duration(toSecsSinceEpoch());
++ return std::chrono::sys_seconds(duration);
++ }
++ #endif // __cpp_lib_chrono >= 201907L && !Q_OS_INTEGRITY
++
++ friend std::chrono::milliseconds operator-(const QDateTime &lhs, const QDateTime &rhs)
++ {
++ return std::chrono::milliseconds(rhs.msecsTo(lhs));
++ }
++
++ friend QDateTime operator+(const QDateTime &dateTime, std::chrono::milliseconds duration)
++ {
++ return dateTime.addMSecs(duration.count());
++ }
++
++ friend QDateTime operator+(std::chrono::milliseconds duration, const QDateTime &dateTime)
++ {
++ return dateTime + duration;
++ }
++
++ QDateTime &operator+=(std::chrono::milliseconds duration)
++ {
++ *this = addMSecs(duration.count());
++ return *this;
++ }
++
++ friend QDateTime operator-(const QDateTime &dateTime, std::chrono::milliseconds duration)
++ {
++ return dateTime.addMSecs(-duration.count());
++ }
++
++ QDateTime &operator-=(std::chrono::milliseconds duration)
++ {
++ *this = addMSecs(-duration.count());
++ return *this;
++ }
++
++ // (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:
++ bool equals(const QDateTime &other) const;
++ #if QT_CORE_REMOVED_SINCE(6, 7)
++ bool precedes(const QDateTime &other) const;
++ #endif
++ friend class QDateTimePrivate;
++
++ Data d;
++
++ friend bool comparesEqual(const QDateTime &lhs, const QDateTime &rhs)
++ { return lhs.equals(rhs); }
++ friend Q_CORE_EXPORT Qt::weak_ordering
++ compareThreeWay(const QDateTime &lhs, const QDateTime &rhs);
++ Q_DECLARE_WEAKLY_ORDERED_NON_NOEXCEPT(QDateTime)
++
++ #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_TYPEINFO(QDateTime::Data, Q_RELOCATABLE_TYPE);
++ Q_DECLARE_SHARED(QDateTime)
++
++ #ifndef QT_NO_DATASTREAM
++ Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, QDate);
++ Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QDate &);
++ Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, 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, QDate);
++ Q_CORE_EXPORT QDebug operator<<(QDebug, 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 size_t qHash(const QDateTime &key, size_t seed = 0);
++ Q_CORE_EXPORT size_t qHash(QDate key, size_t seed = 0) noexcept;
++ Q_CORE_EXPORT size_t qHash(QTime key, size_t seed = 0) noexcept;
++
++ #if QT_CONFIG(datestring) && QT_CORE_INLINE_IMPL_SINCE(6, 7)
++ QDate QDate::fromString(const QString &string, QStringView format, QCalendar cal)
++ {
++ return fromString(string, format, QLocale::DefaultTwoDigitBaseYear, cal);
++ }
++
++ QDateTime QDateTime::fromString(const QString &string, QStringView format, QCalendar cal)
++ {
++ return fromString(string, format, QLocale::DefaultTwoDigitBaseYear, cal);
++ }
++ #endif
++
++ QT_END_NAMESPACE
++
++ #endif // QDATETIME_H