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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 5881 insertions, 0 deletions

diff --git a/src/corelib/tools/qdatetime.cpp b/src/corelib/tools/qdatetime.cpp
new file mode 100644
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--- /dev/null
+++ b/src/corelib/tools/qdatetime.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qplatformdefs.h"
+#include "private/qdatetime_p.h"
+
+#include "qdatastream.h"
+#include "qset.h"
+#include "qlocale.h"
+#include "qdatetime.h"
+#include "qregexp.h"
+#include "qdebug.h"
+#if defined(Q_OS_WIN32) || defined(Q_OS_WINCE)
+#include <qt_windows.h>
+#endif
+#ifndef Q_WS_WIN
+#include <locale.h>
+#endif
+
+#include <time.h>
+#if defined(Q_OS_WINCE)
+#include "qfunctions_wince.h"
+#endif
+
+//#define QDATETIMEPARSER_DEBUG
+#if defined (QDATETIMEPARSER_DEBUG) && !defined(QT_NO_DEBUG_STREAM)
+#  define QDTPDEBUG qDebug() << QString("%1:%2").arg(__FILE__).arg(__LINE__)
+#  define QDTPDEBUGN qDebug
+#else
+#  define QDTPDEBUG if (false) qDebug()
+#  define QDTPDEBUGN if (false) qDebug
+#endif
+
+#if defined(Q_WS_MAC)
+#include <private/qcore_mac_p.h>
+#endif
+
+#if defined(Q_OS_SYMBIAN)
+#include <e32std.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+enum {
+    FIRST_YEAR = -4713,
+    FIRST_MONTH = 1,
+    FIRST_DAY = 2,  // ### Qt 5: make FIRST_DAY = 1, by support jd == 0 as valid
+    SECS_PER_DAY = 86400,
+    MSECS_PER_DAY = 86400000,
+    SECS_PER_HOUR = 3600,
+    MSECS_PER_HOUR = 3600000,
+    SECS_PER_MIN = 60,
+    MSECS_PER_MIN = 60000,
+    JULIAN_DAY_FOR_EPOCH = 2440588 // result of julianDayFromGregorianDate(1970, 1, 1)
+};
+
+static inline QDate fixedDate(int y, int m, int d)
+{
+    QDate result(y, m, 1);
+    result.setDate(y, m, qMin(d, result.daysInMonth()));
+    return result;
+}
+
+static inline uint julianDayFromGregorianDate(int year, int month, int day)
+{
+    // Gregorian calendar starting from October 15, 1582
+    // Algorithm from Henry F. Fliegel and Thomas C. Van Flandern
+    return (1461 * (year + 4800 + (month - 14) / 12)) / 4
+           + (367 * (month - 2 - 12 * ((month - 14) / 12))) / 12
+           - (3 * ((year + 4900 + (month - 14) / 12) / 100)) / 4
+           + day - 32075;
+}
+
+static uint julianDayFromDate(int year, int month, int day)
+{
+    if (year < 0)
+        ++year;
+
+    if (year > 1582 || (year == 1582 && (month > 10 || (month == 10 && day >= 15)))) {
+        return julianDayFromGregorianDate(year, month, day);
+    } else if (year < 1582 || (year == 1582 && (month < 10 || (month == 10 && day <= 4)))) {
+        // Julian calendar until October 4, 1582
+        // Algorithm from Frequently Asked Questions about Calendars by Claus Toendering
+        int a = (14 - month) / 12;
+        return (153 * (month + (12 * a) - 3) + 2) / 5
+               + (1461 * (year + 4800 - a)) / 4
+               + day - 32083;
+    } else {
+        // the day following October 4, 1582 is October 15, 1582
+        return 0;
+    }
+}
+
+static void getDateFromJulianDay(uint julianDay, int *year, int *month, int *day)
+{
+    int y, m, d;
+
+    if (julianDay >= 2299161) {
+        // Gregorian calendar starting from October 15, 1582
+        // This algorithm is from Henry F. Fliegel and Thomas C. Van Flandern
+        qulonglong ell, n, i, j;
+        ell = qulonglong(julianDay) + 68569;
+        n = (4 * ell) / 146097;
+        ell = ell - (146097 * n + 3) / 4;
+        i = (4000 * (ell + 1)) / 1461001;
+        ell = ell - (1461 * i) / 4 + 31;
+        j = (80 * ell) / 2447;
+        d = ell - (2447 * j) / 80;
+        ell = j / 11;
+        m = j + 2 - (12 * ell);
+        y = 100 * (n - 49) + i + ell;
+    } else {
+        // Julian calendar until October 4, 1582
+        // Algorithm from Frequently Asked Questions about Calendars by Claus Toendering
+        julianDay += 32082;
+        int dd = (4 * julianDay + 3) / 1461;
+        int ee = julianDay - (1461 * dd) / 4;
+        int mm = ((5 * ee) + 2) / 153;
+        d = ee - (153 * mm + 2) / 5 + 1;
+        m = mm + 3 - 12 * (mm / 10);
+        y = dd - 4800 + (mm / 10);
+        if (y <= 0)
+            --y;
+    }
+    if (year)
+        *year = y;
+    if (month)
+        *month = m;
+    if (day)
+        *day = d;
+}
+
+
+static const char monthDays[] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+
+#ifndef QT_NO_TEXTDATE
+static const char * const qt_shortMonthNames[] = {
+    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
+#endif
+#ifndef QT_NO_DATESTRING
+static QString fmtDateTime(const QString& f, const QTime* dt = 0, const QDate* dd = 0);
+#endif
+
+/*****************************************************************************
+  QDate member functions
+ *****************************************************************************/
+
+/*!
+    \since 4.5
+
+    \enum QDate::MonthNameType
+
+    This enum describes the types of the string representation used
+    for the month name.
+
+    \value DateFormat This type of name can be used for date-to-string formatting.
+    \value StandaloneFormat This type is used when you need to enumerate months or weekdays.
+           Usually standalone names are represented in singular forms with
+           capitalized first letter.
+*/
+
+/*!
+    \class QDate
+    \reentrant
+    \brief The QDate class provides date functions.
+
+
+    A QDate object contains a calendar date, i.e. year, month, and day
+    numbers, in the Gregorian calendar. (see \l{QDate G and J} {Use of
+    Gregorian and Julian Calendars} for dates prior to 15 October
+    1582). It can read the current date from the system clock. It
+    provides functions for comparing dates, and for manipulating
+    dates. For example, it is possible to add and subtract days,
+    months, and years to dates.
+
+    A QDate object is typically created either by giving the year,
+    month, and day numbers explicitly. Note that QDate interprets two
+    digit years as is, i.e., years 0 - 99. A QDate can also be
+    constructed with the static function currentDate(), which creates
+    a QDate object containing the system clock's date.  An explicit
+    date can also be set using setDate(). The fromString() function
+    returns a QDate given a string and a date format which is used to
+    interpret the date within the string.
+
+    The year(), month(), and day() functions provide access to the
+    year, month, and day numbers. Also, dayOfWeek() and dayOfYear()
+    functions are provided. The same information is provided in
+    textual format by the toString(), shortDayName(), longDayName(),
+    shortMonthName(), and longMonthName() functions.
+
+    QDate provides a full set of operators to compare two QDate
+    objects where smaller means earlier, and larger means later.
+
+    You can increment (or decrement) a date by a given number of days
+    using addDays(). Similarly you can use addMonths() and addYears().
+    The daysTo() function returns the number of days between two
+    dates.
+
+    The daysInMonth() and daysInYear() functions return how many days
+    there are in this date's month and year, respectively. The
+    isLeapYear() function indicates whether a date is in a leap year.
+
+    \section1
+
+    \target QDate G and J
+    \section2 Use of Gregorian and Julian Calendars
+
+    QDate uses the Gregorian calendar in all locales, beginning
+    on the date 15 October 1582. For dates up to and including 4
+    October 1582, the Julian calendar is used.  This means there is a
+    10-day gap in the internal calendar between the 4th and the 15th
+    of October 1582. When you use QDateTime for dates in that epoch,
+    the day after 4 October 1582 is 15 October 1582, and the dates in
+    the gap are invalid.
+
+    The Julian to Gregorian changeover date used here is the date when
+    the Gregorian calendar was first introduced, by Pope Gregory
+    XIII. That change was not universally accepted and some localities
+    only executed it at a later date (if at all).  QDateTime
+    doesn't take any of these historical facts into account. If an
+    application must support a locale-specific dating system, it must
+    do so on its own, remembering to convert the dates using the
+    Julian day.
+
+    \section2 No Year 0
+
+    There is no year 0. Dates in that year are considered invalid. The
+    year -1 is the year "1 before Christ" or "1 before current era."
+    The day before 0001-01-01 is December 31st, 1 BCE.
+
+    \section2 Range of Valid Dates
+
+    The range of valid dates is from January 2nd, 4713 BCE, to
+    sometime in the year 11 million CE. The Julian Day returned by
+    QDate::toJulianDay() is a number in the contiguous range from 1 to
+    \e{overflow}, even across QDateTime's "date holes". It is suitable
+    for use in applications that must convert a QDateTime to a date in
+    another calendar system, e.g., Hebrew, Islamic or Chinese.
+
+    \sa QTime, QDateTime, QDateEdit, QDateTimeEdit, QCalendarWidget
+*/
+
+/*!
+    \fn QDate::QDate()
+
+    Constructs a null date. Null dates are invalid.
+
+    \sa isNull(), isValid()
+*/
+
+/*!
+    Constructs a date with year \a y, month \a m and day \a d.
+
+    If the specified date is invalid, the date is not set and
+    isValid() returns false. A date before 2 January 4713 B.C. is
+    considered invalid.
+
+    \warning Years 0 to 99 are interpreted as is, i.e., years
+             0-99.
+
+    \sa isValid()
+*/
+
+QDate::QDate(int y, int m, int d)
+{
+    setDate(y, m, d);
+}
+
+
+/*!
+    \fn bool QDate::isNull() const
+
+    Returns true if the date is null; otherwise returns false. A null
+    date is invalid.
+
+    \note The behavior of this function is equivalent to isValid().
+
+    \sa isValid()
+*/
+
+
+/*!
+    Returns true if this date is valid; otherwise returns false.
+
+    \sa isNull()
+*/
+
+bool QDate::isValid() const
+{
+    return !isNull();
+}
+
+
+/*!
+    Returns the year of this date. Negative numbers indicate years
+    before 1 A.D. = 1 C.E., such that year -44 is 44 B.C.
+
+    \sa month(), day()
+*/
+
+int QDate::year() const
+{
+    int y;
+    getDateFromJulianDay(jd, &y, 0, 0);
+    return y;
+}
+
+/*!
+    Returns the number corresponding to the month of this date, using
+    the following convention:
+
+    \list
+    \i 1 = "January"
+    \i 2 = "February"
+    \i 3 = "March"
+    \i 4 = "April"
+    \i 5 = "May"
+    \i 6 = "June"
+    \i 7 = "July"
+    \i 8 = "August"
+    \i 9 = "September"
+    \i 10 = "October"
+    \i 11 = "November"
+    \i 12 = "December"
+    \endlist
+
+    \sa year(), day()
+*/
+
+int QDate::month() const
+{
+    int m;
+    getDateFromJulianDay(jd, 0, &m, 0);
+    return m;
+}
+
+/*!
+    Returns the day of the month (1 to 31) of this date.
+
+    \sa year(), month(), dayOfWeek()
+*/
+
+int QDate::day() const
+{
+    int d;
+    getDateFromJulianDay(jd, 0, 0, &d);
+    return d;
+}
+
+/*!
+    Returns the weekday (1 to 7) for this date.
+
+    \sa day(), dayOfYear(), Qt::DayOfWeek
+*/
+
+int QDate::dayOfWeek() const
+{
+    return (jd % 7) + 1;
+}
+
+/*!
+    Returns the day of the year (1 to 365 or 366 on leap years) for
+    this date.
+
+    \sa day(), dayOfWeek()
+*/
+
+int QDate::dayOfYear() const
+{
+    return jd - julianDayFromDate(year(), 1, 1) + 1;
+}
+
+/*!
+    Returns the number of days in the month (28 to 31) for this date.
+
+    \sa day(), daysInYear()
+*/
+
+int QDate::daysInMonth() const
+{
+    int y, m, d;
+    getDateFromJulianDay(jd, &y, &m, &d);
+    if (m == 2 && isLeapYear(y))
+        return 29;
+    else
+        return monthDays[m];
+}
+
+/*!
+    Returns the number of days in the year (365 or 366) for this date.
+
+    \sa day(), daysInMonth()
+*/
+
+int QDate::daysInYear() const
+{
+    int y, m, d;
+    getDateFromJulianDay(jd, &y, &m, &d);
+    return isLeapYear(y) ? 366 : 365;
+}
+
+/*!
+    Returns the week number (1 to 53), and stores the year in
+    *\a{yearNumber} unless \a yearNumber is null (the default).
+
+    Returns 0 if the date is invalid.
+
+    In accordance with ISO 8601, weeks start on Monday and the first
+    Thursday of a year is always in week 1 of that year. Most years
+    have 52 weeks, but some have 53.
+
+    *\a{yearNumber} is not always the same as year(). For example, 1
+    January 2000 has week number 52 in the year 1999, and 31 December
+    2002 has week number 1 in the year 2003.
+
+    \legalese
+    Copyright (c) 1989 The Regents of the University of California.
+    All rights reserved.
+
+    Redistribution and use in source and binary forms are permitted
+    provided that the above copyright notice and this paragraph are
+    duplicated in all such forms and that any documentation,
+    advertising materials, and other materials related to such
+    distribution and use acknowledge that the software was developed
+    by the University of California, Berkeley.  The name of the
+    University may not be used to endorse or promote products derived
+    from this software without specific prior written permission.
+    THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
+    IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+
+    \sa isValid()
+*/
+
+int QDate::weekNumber(int *yearNumber) const
+{
+    if (!isValid())
+        return 0;
+
+    int year = QDate::year();
+    int yday = dayOfYear() - 1;
+    int wday = dayOfWeek();
+    if (wday == 7)
+        wday = 0;
+    int w;
+
+    for (;;) {
+        int len;
+        int bot;
+        int top;
+
+        len = isLeapYear(year) ? 366 : 365;
+        /*
+        ** What yday (-3 ... 3) does
+        ** the ISO year begin on?
+        */
+        bot = ((yday + 11 - wday) % 7) - 3;
+        /*
+        ** What yday does the NEXT
+        ** ISO year begin on?
+        */
+        top = bot - (len % 7);
+        if (top < -3)
+            top += 7;
+        top += len;
+        if (yday >= top) {
+            ++year;
+            w = 1;
+            break;
+        }
+        if (yday >= bot) {
+            w = 1 + ((yday - bot) / 7);
+            break;
+        }
+        --year;
+        yday += isLeapYear(year) ? 366 : 365;
+    }
+    if (yearNumber != 0)
+        *yearNumber = year;
+    return w;
+}
+
+#ifndef QT_NO_TEXTDATE
+/*!
+    \since 4.5
+
+    Returns the short name of the \a month for the representation specified
+    by \a type.
+
+    The months are enumerated using the following convention:
+
+    \list
+    \i 1 = "Jan"
+    \i 2 = "Feb"
+    \i 3 = "Mar"
+    \i 4 = "Apr"
+    \i 5 = "May"
+    \i 6 = "Jun"
+    \i 7 = "Jul"
+    \i 8 = "Aug"
+    \i 9 = "Sep"
+    \i 10 = "Oct"
+    \i 11 = "Nov"
+    \i 12 = "Dec"
+    \endlist
+
+    The month names will be localized according to the system's locale
+    settings.
+
+    \sa toString(), longMonthName(), shortDayName(), longDayName()
+*/
+
+QString QDate::shortMonthName(int month, QDate::MonthNameType type)
+{
+    if (month < 1 || month > 12) {
+        month = 1;
+    }
+    switch (type) {
+    case QDate::DateFormat:
+        return QLocale::system().monthName(month, QLocale::ShortFormat);
+    case QDate::StandaloneFormat:
+        return QLocale::system().standaloneMonthName(month, QLocale::ShortFormat);
+    default:
+        break;
+    }
+    return QString();
+}
+
+/*!
+    Returns the short version of the name of the \a month. The
+    returned name is in normal type which can be used for date formatting.
+
+    \sa toString(), longMonthName(), shortDayName(), longDayName()
+ */
+
+QString QDate::shortMonthName(int month)
+{
+    return shortMonthName(month, QDate::DateFormat);
+}
+
+/*!
+    \since 4.5
+
+    Returns the long name of the \a month for the representation specified
+    by \a type.
+
+    The months are enumerated using the following convention:
+
+    \list
+    \i 1 = "January"
+    \i 2 = "February"
+    \i 3 = "March"
+    \i 4 = "April"
+    \i 5 = "May"
+    \i 6 = "June"
+    \i 7 = "July"
+    \i 8 = "August"
+    \i 9 = "September"
+    \i 10 = "October"
+    \i 11 = "November"
+    \i 12 = "December"
+    \endlist
+
+    The month names will be localized according to the system's locale
+    settings.
+
+    \sa toString(), shortMonthName(), shortDayName(), longDayName()
+*/
+
+QString QDate::longMonthName(int month, MonthNameType type)
+{
+    if (month < 1 || month > 12) {
+        month = 1;
+    }
+    switch (type) {
+    case QDate::DateFormat:
+        return QLocale::system().monthName(month, QLocale::LongFormat);
+    case QDate::StandaloneFormat:
+        return QLocale::system().standaloneMonthName(month, QLocale::LongFormat);
+    default:
+        break;
+    }
+    return QString();
+}
+
+/*!
+    Returns the long version of the name of the \a month. The
+    returned name is in normal type which can be used for date formatting.
+
+    \sa toString(), shortMonthName(), shortDayName(), longDayName()
+ */
+
+QString QDate::longMonthName(int month)
+{
+    if (month < 1 || month > 12) {
+        month = 1;
+    }
+    return QLocale::system().monthName(month, QLocale::LongFormat);
+}
+
+/*!
+    \since 4.5
+
+    Returns the short name of the \a weekday for the representation specified
+    by \a type.
+
+    The days are enumerated using the following convention:
+
+    \list
+    \i 1 = "Mon"
+    \i 2 = "Tue"
+    \i 3 = "Wed"
+    \i 4 = "Thu"
+    \i 5 = "Fri"
+    \i 6 = "Sat"
+    \i 7 = "Sun"
+    \endlist
+
+    The day names will be localized according to the system's locale
+    settings.
+
+    \sa toString(), shortMonthName(), longMonthName(), longDayName()
+*/
+
+QString QDate::shortDayName(int weekday, MonthNameType type)
+{
+    if (weekday < 1 || weekday > 7) {
+        weekday = 1;
+    }
+    switch (type) {
+    case QDate::DateFormat:
+        return QLocale::system().dayName(weekday, QLocale::ShortFormat);
+    case QDate::StandaloneFormat:
+        return QLocale::system().standaloneDayName(weekday, QLocale::ShortFormat);
+    default:
+        break;
+    }
+    return QString();
+}
+
+/*!
+    Returns the short version of the name of the \a weekday. The
+    returned name is in normal type which can be used for date formatting.
+
+    \sa toString(), longDayName(), shortMonthName(), longMonthName()
+ */
+
+QString QDate::shortDayName(int weekday)
+{
+    if (weekday < 1 || weekday > 7) {
+        weekday = 1;
+    }
+    return QLocale::system().dayName(weekday, QLocale::ShortFormat);
+}
+
+/*!
+    \since 4.5
+
+    Returns the long name of the \a weekday for the representation specified
+    by \a type.
+
+    The days are enumerated using the following convention:
+
+    \list
+    \i 1 = "Monday"
+    \i 2 = "Tuesday"
+    \i 3 = "Wednesday"
+    \i 4 = "Thursday"
+    \i 5 = "Friday"
+    \i 6 = "Saturday"
+    \i 7 = "Sunday"
+    \endlist
+
+    The day names will be localized according to the system's locale
+    settings.
+
+    \sa toString(), shortDayName(), shortMonthName(), longMonthName()
+*/
+
+QString QDate::longDayName(int weekday, MonthNameType type)
+{
+    if (weekday < 1 || weekday > 7) {
+        weekday = 1;
+    }
+    switch (type) {
+    case QDate::DateFormat:
+        return QLocale::system().dayName(weekday, QLocale::LongFormat);
+    case QDate::StandaloneFormat:
+        return QLocale::system().standaloneDayName(weekday, QLocale::LongFormat);
+    default:
+        break;
+    }
+    return QLocale::system().dayName(weekday, QLocale::LongFormat);
+}
+
+/*!
+    Returns the long version of the name of the \a weekday. The
+    returned name is in normal type which can be used for date formatting.
+
+    \sa toString(), shortDayName(), shortMonthName(), longMonthName()
+ */
+
+QString QDate::longDayName(int weekday)
+{
+    if (weekday < 1 || weekday > 7) {
+        weekday = 1;
+    }
+    return QLocale::system().dayName(weekday, QLocale::LongFormat);
+}
+#endif //QT_NO_TEXTDATE
+
+#ifndef QT_NO_DATESTRING
+
+/*!
+    \fn QString QDate::toString(Qt::DateFormat format) const
+
+    \overload
+
+    Returns the date as a string. The \a format parameter determines
+    the format of the string.
+
+    If the \a format is Qt::TextDate, the string is formatted in
+    the default way. QDate::shortDayName() and QDate::shortMonthName()
+    are used to generate the string, so the day and month names will
+    be localized names. An example of this formatting is
+    "Sat May 20 1995".
+
+    If the \a format is Qt::ISODate, the string format corresponds
+    to the ISO 8601 extended specification for representations of
+    dates and times, taking the form YYYY-MM-DD, where YYYY is the
+    year, MM is the month of the year (between 01 and 12), and DD is
+    the day of the month between 01 and 31.
+
+    If the \a format is Qt::SystemLocaleShortDate or
+    Qt::SystemLocaleLongDate, the string format depends on the locale
+    settings of the system. Identical to calling
+    QLocale::system().toString(date, QLocale::ShortFormat) or
+    QLocale::system().toString(date, QLocale::LongFormat).
+
+    If the \a format is Qt::DefaultLocaleShortDate or
+    Qt::DefaultLocaleLongDate, the string format depends on the
+    default application locale. This is the locale set with
+    QLocale::setDefault(), or the system locale if no default locale
+    has been set. Identical to calling QLocale().toString(date,
+    QLocale::ShortFormat) or QLocale().toString(date,
+    QLocale::LongFormat).
+
+    If the date is invalid, an empty string will be returned.
+
+    \warning The Qt::ISODate format is only valid for years in the
+    range 0 to 9999. This restriction may apply to locale-aware
+    formats as well, depending on the locale settings.
+
+    \sa shortDayName(), shortMonthName()
+*/
+QString QDate::toString(Qt::DateFormat f) const
+{
+    if (!isValid())
+        return QString();
+    int y, m, d;
+    getDateFromJulianDay(jd, &y, &m, &d);
+    switch (f) {
+    case Qt::SystemLocaleDate:
+    case Qt::SystemLocaleShortDate:
+    case Qt::SystemLocaleLongDate:
+        return QLocale::system().toString(*this, f == Qt::SystemLocaleLongDate ? QLocale::LongFormat
+                                                                               : QLocale::ShortFormat);
+    case Qt::LocaleDate:
+    case Qt::DefaultLocaleShortDate:
+    case Qt::DefaultLocaleLongDate:
+        return QLocale().toString(*this, f == Qt::DefaultLocaleLongDate ? QLocale::LongFormat
+                                                                        : QLocale::ShortFormat);
+    default:
+#ifndef QT_NO_TEXTDATE
+    case Qt::TextDate:
+        {
+            return QString::fromLatin1("%0 %1 %2 %3")
+                .arg(shortDayName(dayOfWeek()))
+                .arg(shortMonthName(m))
+                .arg(d)
+                .arg(y);
+        }
+#endif
+    case Qt::ISODate:
+        {
+            if (year() < 0 || year() > 9999)
+                return QString();
+            QString month(QString::number(m).rightJustified(2, QLatin1Char('0')));
+            QString day(QString::number(d).rightJustified(2, QLatin1Char('0')));
+            return QString::number(y) + QLatin1Char('-') + month + QLatin1Char('-') + day;
+        }
+    }
+}
+
+/*!
+    Returns the date as a string. The \a format parameter determines
+    the format of the result string.
+
+    These expressions may be used:
+
+    \table
+    \header \i Expression \i Output
+    \row \i d \i the day as number without a leading zero (1 to 31)
+    \row \i dd \i the day as number with a leading zero (01 to 31)
+    \row \i ddd
+         \i the abbreviated localized day name (e.g. 'Mon' to 'Sun').
+            Uses QDate::shortDayName().
+    \row \i dddd
+         \i the long localized day name (e.g. 'Monday' to 'Sunday').
+            Uses QDate::longDayName().
+    \row \i M \i the month as number without a leading zero (1 to 12)
+    \row \i MM \i the month as number with a leading zero (01 to 12)
+    \row \i MMM
+         \i the abbreviated localized month name (e.g. 'Jan' to 'Dec').
+            Uses QDate::shortMonthName().
+    \row \i MMMM
+         \i the long localized month name (e.g. 'January' to 'December').
+            Uses QDate::longMonthName().
+    \row \i yy \i the year as two digit number (00 to 99)
+    \row \i yyyy \i the year as four digit number. If the year is negative,
+            a minus sign is prepended in addition.
+    \endtable
+
+    All other input characters will be ignored. Any sequence of characters that
+    are enclosed in singlequotes will be treated as text and not be used as an
+    expression. Two consecutive singlequotes ("''") are replaced by a singlequote
+    in the output.
+
+    Example format strings (assuming that the QDate is the 20 July
+    1969):
+
+    \table
+    \header \o Format            \o Result
+    \row    \o dd.MM.yyyy        \o 20.07.1969
+    \row    \o ddd MMMM d yy     \o Sun July 20 69
+    \row    \o 'The day is' dddd \o The day is Sunday
+    \endtable
+
+    If the datetime is invalid, an empty string will be returned.
+
+    \warning The Qt::ISODate format is only valid for years in the
+    range 0 to 9999. This restriction may apply to locale-aware
+    formats as well, depending on the locale settings.
+
+    \sa QDateTime::toString() QTime::toString()
+
+*/
+QString QDate::toString(const QString& format) const
+{
+    if (year() > 9999)
+        return QString();
+    return fmtDateTime(format, 0, this);
+}
+#endif //QT_NO_DATESTRING
+
+/*!
+    \obsolete
+
+    Sets the date's year \a y, month \a m, and day \a d.
+
+    If \a y is in the range 0 to 99, it is interpreted as 1900 to
+    1999.
+
+    Use setDate() instead.
+*/
+
+bool QDate::setYMD(int y, int m, int d)
+{
+    if (uint(y) <= 99)
+        y += 1900;
+    return setDate(y, m, d);
+}
+
+/*!
+    \since 4.2
+
+    Sets the date's \a year, \a month, and \a day. Returns true if
+    the date is valid; otherwise returns false.
+
+    If the specified date is invalid, the QDate object is set to be
+    invalid. Any date before 2 January 4713 B.C. is considered
+    invalid.
+
+    \sa isValid()
+*/
+bool QDate::setDate(int year, int month, int day)
+{
+    if (!isValid(year, month, day)) {
+        jd = 0;
+    } else {
+        jd = julianDayFromDate(year, month, day);
+    }
+    return jd != 0;
+}
+
+/*!
+    \since 4.5
+
+    Extracts the date's year, month, and day, and assigns them to
+    *\a year, *\a month, and *\a day. The pointers may be null.
+
+    \sa year(), month(), day(), isValid()
+*/
+void QDate::getDate(int *year, int *month, int *day)
+{
+    getDateFromJulianDay(jd, year, month, day);
+}
+
+/*!
+    Returns a QDate object containing a date \a ndays later than the
+    date of this object (or earlier if \a ndays is negative).
+
+    \sa addMonths() addYears() daysTo()
+*/
+
+QDate QDate::addDays(int ndays) const
+{
+    QDate d;
+    // this is basically "d.jd = jd + ndays" with checks for integer overflow
+    if (ndays >= 0)
+        d.jd = (jd + ndays >= jd) ? jd + ndays : 0;
+    else
+        d.jd = (jd + ndays < jd) ? jd + ndays : 0;
+    return d;
+}
+
+/*!
+    Returns a QDate object containing a date \a nmonths later than the
+    date of this object (or earlier if \a nmonths is negative).
+
+    \note If the ending day/month combination does not exist in the
+    resulting month/year, this function will return a date that is the
+    latest valid date.
+
+    \warning QDate has a date hole around the days introducing the
+    Gregorian calendar (the days 5 to 14 October 1582, inclusive, do
+    not exist). If the calculation ends in one of those days, QDate
+    will return either October 4 or October 15.
+
+    \sa addDays() addYears()
+*/
+
+QDate QDate::addMonths(int nmonths) const
+{
+    if (!isValid())
+        return QDate();
+    if (!nmonths)
+        return *this;
+
+    int old_y, y, m, d;
+    getDateFromJulianDay(jd, &y, &m, &d);
+    old_y = y;
+
+    bool increasing = nmonths > 0;
+
+    while (nmonths != 0) {
+        if (nmonths < 0 && nmonths + 12 <= 0) {
+            y--;
+            nmonths+=12;
+        } else if (nmonths < 0) {
+            m+= nmonths;
+            nmonths = 0;
+            if (m <= 0) {
+                --y;
+                m += 12;
+            }
+        } else if (nmonths - 12 >= 0) {
+            y++;
+            nmonths -= 12;
+        } else if (m == 12) {
+            y++;
+            m = 0;
+        } else {
+            m += nmonths;
+            nmonths = 0;
+            if (m > 12) {
+                ++y;
+                m -= 12;
+            }
+        }
+    }
+
+    // was there a sign change?
+    if ((old_y > 0 && y <= 0) ||
+        (old_y < 0 && y >= 0))
+        // yes, adjust the date by +1 or -1 years
+        y += increasing ? +1 : -1;
+
+    // did we end up in the Gregorian/Julian conversion hole?
+    if (y == 1582 && m == 10 && d > 4 && d < 15)
+        d = increasing ? 15 : 4;
+
+    return fixedDate(y, m, d);
+}
+
+/*!
+    Returns a QDate object containing a date \a nyears later than the
+    date of this object (or earlier if \a nyears is negative).
+
+    \note If the ending day/month combination does not exist in the
+    resulting year (i.e., if the date was Feb 29 and the final year is
+    not a leap year), this function will return a date that is the
+    latest valid date (that is, Feb 28).
+
+    \sa addDays(), addMonths()
+*/
+
+QDate QDate::addYears(int nyears) const
+{
+    if (!isValid())
+        return QDate();
+
+    int y, m, d;
+    getDateFromJulianDay(jd, &y, &m, &d);
+
+    int old_y = y;
+    y += nyears;
+
+    // was there a sign change?
+    if ((old_y > 0 && y <= 0) ||
+        (old_y < 0 && y >= 0))
+        // yes, adjust the date by +1 or -1 years
+        y += nyears > 0 ? +1 : -1;
+
+    return fixedDate(y, m, d);
+}
+
+/*!
+    Returns the number of days from this date to \a d (which is
+    negative if \a d is earlier than this date).
+
+    Example:
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 0
+
+    \sa addDays()
+*/
+
+int QDate::daysTo(const QDate &d) const
+{
+    return d.jd - jd;
+}
+
+
+/*!
+    \fn bool QDate::operator==(const QDate &d) const
+
+    Returns true if this date is equal to \a d; otherwise returns
+    false.
+
+*/
+
+/*!
+    \fn bool QDate::operator!=(const QDate &d) const
+
+    Returns true if this date is different from \a d; otherwise
+    returns false.
+*/
+
+/*!
+    \fn bool QDate::operator<(const QDate &d) const
+
+    Returns true if this date is earlier than \a d; otherwise returns
+    false.
+*/
+
+/*!
+    \fn bool QDate::operator<=(const QDate &d) const
+
+    Returns true if this date is earlier than or equal to \a d;
+    otherwise returns false.
+*/
+
+/*!
+    \fn bool QDate::operator>(const QDate &d) const
+
+    Returns true if this date is later than \a d; otherwise returns
+    false.
+*/
+
+/*!
+    \fn bool QDate::operator>=(const QDate &d) const
+
+    Returns true if this date is later than or equal to \a d;
+    otherwise returns false.
+*/
+
+/*!
+    \fn QDate::currentDate()
+    Returns the current date, as reported by the system clock.
+
+    \sa QTime::currentTime(), QDateTime::currentDateTime()
+*/
+
+#ifndef QT_NO_DATESTRING
+/*!
+    \fn QDate QDate::fromString(const QString &string, Qt::DateFormat format)
+
+    Returns the QDate represented by the \a string, using the
+    \a format given, or an invalid date if the string cannot be
+    parsed.
+
+    Note for Qt::TextDate: It is recommended that you use the
+    English short month names (e.g. "Jan"). Although localized month
+    names can also be used, they depend on the user's locale settings.
+*/
+QDate QDate::fromString(const QString& s, Qt::DateFormat f)
+{
+    if (s.isEmpty())
+        return QDate();
+
+    switch (f) {
+    case Qt::ISODate:
+        {
+            int year(s.mid(0, 4).toInt());
+            int month(s.mid(5, 2).toInt());
+            int day(s.mid(8, 2).toInt());
+            if (year && month && day)
+                return QDate(year, month, day);
+        }
+        break;
+    case Qt::SystemLocaleDate:
+    case Qt::SystemLocaleShortDate:
+    case Qt::SystemLocaleLongDate:
+        return fromString(s, QLocale::system().dateFormat(f == Qt::SystemLocaleLongDate ? QLocale::LongFormat
+                                                                                        : QLocale::ShortFormat));
+    case Qt::LocaleDate:
+    case Qt::DefaultLocaleShortDate:
+    case Qt::DefaultLocaleLongDate:
+        return fromString(s, QLocale().dateFormat(f == Qt::DefaultLocaleLongDate ? QLocale::LongFormat
+                                                                                 : QLocale::ShortFormat));
+    default:
+#ifndef QT_NO_TEXTDATE
+    case Qt::TextDate: {
+        QStringList parts = s.split(QLatin1Char(' '), QString::SkipEmptyParts);
+
+        if (parts.count() != 4) {
+            return QDate();
+        }
+
+        QString monthName = parts.at(1);
+        int month = -1;
+        // Assume that English monthnames are the default
+        for (int i = 0; i < 12; ++i) {
+            if (monthName == QLatin1String(qt_shortMonthNames[i])) {
+                month = i + 1;
+                break;
+            }
+        }
+        // If English names can't be found, search the localized ones
+        if (month == -1) {
+            for (int i = 1; i <= 12; ++i) {
+                if (monthName == QDate::shortMonthName(i)) {
+                    month = i;
+                    break;
+                }
+            }
+        }
+        if (month < 1 || month > 12) {
+            return QDate();
+        }
+
+        bool ok;
+        int day = parts.at(2).toInt(&ok);
+        if (!ok) {
+            return QDate();
+        }
+
+        int year = parts.at(3).toInt(&ok);
+        if (!ok) {
+            return QDate();
+        }
+
+        return QDate(year, month, day);
+    }
+#else
+        break;
+#endif
+    }
+    return QDate();
+}
+
+/*!
+    \fn QDate::fromString(const QString &string, const QString &format)
+
+    Returns the QDate represented by the \a string, using the \a
+    format given, or an invalid date if the string cannot be parsed.
+
+    These expressions may be used for the format:
+
+    \table
+    \header \i Expression \i Output
+    \row \i d \i The day as a number without a leading zero (1 to 31)
+    \row \i dd \i The day as a number with a leading zero (01 to 31)
+    \row \i ddd
+         \i The abbreviated localized day name (e.g. 'Mon' to 'Sun').
+            Uses QDate::shortDayName().
+    \row \i dddd
+         \i The long localized day name (e.g. 'Monday' to 'Sunday').
+            Uses QDate::longDayName().
+    \row \i M \i The month as a number without a leading zero (1 to 12)
+    \row \i MM \i The month as a number with a leading zero (01 to 12)
+    \row \i MMM
+         \i The abbreviated localized month name (e.g. 'Jan' to 'Dec').
+            Uses QDate::shortMonthName().
+    \row \i MMMM
+         \i The long localized month name (e.g. 'January' to 'December').
+            Uses QDate::longMonthName().
+    \row \i yy \i The year as two digit number (00 to 99)
+    \row \i yyyy \i The year as four digit number. If the year is negative,
+            a minus sign is prepended in addition.
+    \endtable
+
+    All other input characters will be treated as text. Any sequence
+    of characters that are enclosed in single quotes will also be
+    treated as text and will not be used as an expression. For example:
+
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 1
+
+    If the format is not satisfied, an invalid QDate is returned. The
+    expressions that don't expect leading zeroes (d, M) will be
+    greedy. This means that they will use two digits even if this
+    will put them outside the accepted range of values and leaves too
+    few digits for other sections. For example, the following format
+    string could have meant January 30 but the M will grab two
+    digits, resulting in an invalid date:
+
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 2
+
+    For any field that is not represented in the format the following
+    defaults are used:
+
+    \table
+    \header \i Field  \i Default value
+    \row    \i Year   \i 1900
+    \row    \i Month  \i 1
+    \row    \i Day    \i 1
+    \endtable
+
+    The following examples demonstrate the default values:
+
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 3
+
+    \sa QDateTime::fromString(), QTime::fromString(), QDate::toString(),
+        QDateTime::toString(), QTime::toString()
+*/
+
+QDate QDate::fromString(const QString &string, const QString &format)
+{
+    QDate date;
+#ifndef QT_BOOTSTRAPPED
+    QDateTimeParser dt(QVariant::Date, QDateTimeParser::FromString);
+    if (dt.parseFormat(format))
+        dt.fromString(string, &date, 0);
+#else
+    Q_UNUSED(string);
+    Q_UNUSED(format);
+#endif
+    return date;
+}
+#endif // QT_NO_DATESTRING
+
+/*!
+    \overload
+
+    Returns true if the specified date (\a year, \a month, and \a
+    day) is valid; otherwise returns false.
+
+    Example:
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 4
+
+    \sa isNull(), setDate()
+*/
+
+bool QDate::isValid(int year, int month, int day)
+{
+    if (year < FIRST_YEAR
+        || (year == FIRST_YEAR &&
+            (month < FIRST_MONTH
+             || (month == FIRST_MONTH && day < FIRST_DAY)))
+        || year == 0) // there is no year 0 in the Julian calendar
+        return false;
+
+    // passage from Julian to Gregorian calendar
+    if (year == 1582 && month == 10 && day > 4 && day < 15)
+        return 0;
+
+    return (day > 0 && month > 0 && month <= 12) &&
+           (day <= monthDays[month] || (day == 29 && month == 2 && isLeapYear(year)));
+}
+
+/*!
+    \fn bool QDate::isLeapYear(int year)
+
+    Returns true if the specified \a year is a leap year; otherwise
+    returns false.
+*/
+
+bool QDate::isLeapYear(int y)
+{
+    if (y < 1582) {
+        if ( y < 1) {  // No year 0 in Julian calendar, so -1, -5, -9 etc are leap years
+            ++y;
+        }
+        return y % 4 == 0;
+    } else {
+        return (y % 4 == 0 && y % 100 != 0) || y % 400 == 0;
+    }
+}
+
+/*!
+    \internal
+
+    This function has a confusing name and shouldn't be part of the
+    API anyway, since we have toJulian() and fromJulian().
+    ### Qt 5: remove it
+*/
+uint QDate::gregorianToJulian(int y, int m, int d)
+{
+    return julianDayFromDate(y, m, d);
+}
+
+/*!
+    \internal
+
+    This function has a confusing name and shouldn't be part of the
+    API anyway, since we have toJulian() and fromJulian().
+    ### Qt 5: remove it
+*/
+void QDate::julianToGregorian(uint jd, int &y, int &m, int &d)
+{
+    getDateFromJulianDay(jd, &y, &m, &d);
+}
+
+/*! \fn static QDate QDate::fromJulianDay(int jd)
+
+    Converts the Julian day \a jd to a QDate.
+
+    \sa toJulianDay()
+*/
+
+/*! \fn int QDate::toJulianDay() const
+
+    Converts the date to a Julian day.
+
+    \sa fromJulianDay()
+*/
+
+/*****************************************************************************
+  QTime member functions
+ *****************************************************************************/
+
+/*!
+    \class QTime
+    \reentrant
+
+    \brief The QTime class provides clock time functions.
+
+
+    A QTime object contains a clock time, i.e. the number of hours,
+    minutes, seconds, and milliseconds since midnight. It can read the
+    current time from the system clock and measure a span of elapsed
+    time. It provides functions for comparing times and for
+    manipulating a time by adding a number of milliseconds.
+
+    QTime uses the 24-hour clock format; it has no concept of AM/PM.
+    Unlike QDateTime, QTime knows nothing about time zones or
+    daylight savings time (DST).
+
+    A QTime object is typically created either by giving the number
+    of hours, minutes, seconds, and milliseconds explicitly, or by
+    using the static function currentTime(), which creates a QTime
+    object that contains the system's local time. Note that the
+    accuracy depends on the accuracy of the underlying operating
+    system; not all systems provide 1-millisecond accuracy.
+
+    The hour(), minute(), second(), and msec() functions provide
+    access to the number of hours, minutes, seconds, and milliseconds
+    of the time. The same information is provided in textual format by
+    the toString() function.
+
+    QTime provides a full set of operators to compare two QTime
+    objects. One time is considered smaller than another if it is
+    earlier than the other.
+
+    The time a given number of seconds or milliseconds later than a
+    given time can be found using the addSecs() or addMSecs()
+    functions. Correspondingly, the number of seconds or milliseconds
+    between two times can be found using secsTo() or msecsTo().
+
+    QTime can be used to measure a span of elapsed time using the
+    start(), restart(), and elapsed() functions.
+
+    \sa QDate, QDateTime
+*/
+
+/*!
+    \fn QTime::QTime()
+
+    Constructs a null time object. A null time can be a QTime(0, 0, 0, 0)
+    (i.e., midnight) object, except that isNull() returns true and isValid()
+    returns false.
+
+    \sa isNull(), isValid()
+*/
+
+/*!
+    Constructs a time with hour \a h, minute \a m, seconds \a s and
+    milliseconds \a ms.
+
+    \a h must be in the range 0 to 23, \a m and \a s must be in the
+    range 0 to 59, and \a ms must be in the range 0 to 999.
+
+    \sa isValid()
+*/
+
+QTime::QTime(int h, int m, int s, int ms)
+{
+    setHMS(h, m, s, ms);
+}
+
+
+/*!
+    \fn bool QTime::isNull() const
+
+    Returns true if the time is null (i.e., the QTime object was
+    constructed using the default constructor); otherwise returns
+    false. A null time is also an invalid time.
+
+    \sa isValid()
+*/
+
+/*!
+    Returns true if the time is valid; otherwise returns false. For example,
+    the time 23:30:55.746 is valid, but 24:12:30 is invalid.
+
+    \sa isNull()
+*/
+
+bool QTime::isValid() const
+{
+    return mds > NullTime && mds < MSECS_PER_DAY;
+}
+
+
+/*!
+    Returns the hour part (0 to 23) of the time.
+
+    \sa minute(), second(), msec()
+*/
+
+int QTime::hour() const
+{
+    return ds() / MSECS_PER_HOUR;
+}
+
+/*!
+    Returns the minute part (0 to 59) of the time.
+
+    \sa hour(), second(), msec()
+*/
+
+int QTime::minute() const
+{
+    return (ds() % MSECS_PER_HOUR) / MSECS_PER_MIN;
+}
+
+/*!
+    Returns the second part (0 to 59) of the time.
+
+    \sa hour(), minute(), msec()
+*/
+
+int QTime::second() const
+{
+    return (ds() / 1000)%SECS_PER_MIN;
+}
+
+/*!
+    Returns the millisecond part (0 to 999) of the time.
+
+    \sa hour(), minute(), second()
+*/
+
+int QTime::msec() const
+{
+    return ds() % 1000;
+}
+
+#ifndef QT_NO_DATESTRING
+/*!
+    \overload
+
+    Returns the time as a string. Milliseconds are not included. The
+    \a format parameter determines the format of the string.
+
+    If \a format is Qt::TextDate, the string format is HH:MM:SS; e.g. 1
+    second before midnight would be "23:59:59".
+
+    If \a format is Qt::ISODate, the string format corresponds to the
+    ISO 8601 extended specification for representations of dates,
+    which is also HH:MM:SS. (However, contrary to ISO 8601, dates
+    before 15 October 1582 are handled as Julian dates, not Gregorian
+    dates. See \l{QDate G and J} {Use of Gregorian and Julian
+    Calendars}. This might change in a future version of Qt.)
+
+    If the \a format is Qt::SystemLocaleShortDate or
+    Qt::SystemLocaleLongDate, the string format depends on the locale
+    settings of the system. Identical to calling
+    QLocale::system().toString(time, QLocale::ShortFormat) or
+    QLocale::system().toString(time, QLocale::LongFormat).
+
+    If the \a format is Qt::DefaultLocaleShortDate or
+    Qt::DefaultLocaleLongDate, the string format depends on the
+    default application locale. This is the locale set with
+    QLocale::setDefault(), or the system locale if no default locale
+    has been set. Identical to calling QLocale().toString(time,
+    QLocale::ShortFormat) or QLocale().toString(time,
+    QLocale::LongFormat).
+
+    If the time is invalid, an empty string will be returned.
+*/
+
+QString QTime::toString(Qt::DateFormat format) const
+{
+    if (!isValid())
+        return QString();
+
+    switch (format) {
+    case Qt::SystemLocaleDate:
+    case Qt::SystemLocaleShortDate:
+    case Qt::SystemLocaleLongDate:
+        return QLocale::system().toString(*this, format == Qt::SystemLocaleLongDate ? QLocale::LongFormat
+                                          : QLocale::ShortFormat);
+    case Qt::LocaleDate:
+    case Qt::DefaultLocaleShortDate:
+    case Qt::DefaultLocaleLongDate:
+        return QLocale().toString(*this, format == Qt::DefaultLocaleLongDate ? QLocale::LongFormat
+                                  : QLocale::ShortFormat);
+
+    default:
+    case Qt::ISODate:
+    case Qt::TextDate:
+        return QString::fromLatin1("%1:%2:%3")
+            .arg(hour(), 2, 10, QLatin1Char('0'))
+            .arg(minute(), 2, 10, QLatin1Char('0'))
+            .arg(second(), 2, 10, QLatin1Char('0'));
+    }
+}
+
+/*!
+    Returns the time as a string. The \a format parameter determines
+    the format of the result string.
+
+    These expressions may be used:
+
+    \table
+    \header \i Expression \i Output
+    \row \i h
+         \i the hour without a leading zero (0 to 23 or 1 to 12 if AM/PM display)
+    \row \i hh
+         \i the hour with a leading zero (00 to 23 or 01 to 12 if AM/PM display)
+    \row \i H
+         \i the hour without a leading zero (0 to 23, even with AM/PM display)
+    \row \i HH
+         \i the hour with a leading zero (00 to 23, even with AM/PM display)
+    \row \i m \i the minute without a leading zero (0 to 59)
+    \row \i mm \i the minute with a leading zero (00 to 59)
+    \row \i s \i the second without a leading zero (0 to 59)
+    \row \i ss \i the second with a leading zero (00 to 59)
+    \row \i z \i the milliseconds without leading zeroes (0 to 999)
+    \row \i zzz \i the milliseconds with leading zeroes (000 to 999)
+    \row \i AP or A
+         \i use AM/PM display. \e AP will be replaced by either "AM" or "PM".
+    \row \i ap or a
+         \i use am/pm display. \e ap will be replaced by either "am" or "pm".
+    \row \i t \i the timezone (for example "CEST")
+    \endtable
+
+    All other input characters will be ignored. Any sequence of characters that
+    are enclosed in singlequotes will be treated as text and not be used as an
+    expression. Two consecutive singlequotes ("''") are replaced by a singlequote
+    in the output.
+
+    Example format strings (assuming that the QTime is 14:13:09.042)
+
+    \table
+    \header \i Format \i Result
+    \row \i hh:mm:ss.zzz \i 14:13:09.042
+    \row \i h:m:s ap     \i 2:13:9 pm
+    \row \i H:m:s a      \i 14:13:9 pm
+    \endtable
+
+    If the datetime is invalid, an empty string will be returned.
+    If \a format is empty, the default format "hh:mm:ss" is used.
+
+    \sa QDate::toString() QDateTime::toString()
+*/
+QString QTime::toString(const QString& format) const
+{
+    return fmtDateTime(format, this, 0);
+}
+#endif //QT_NO_DATESTRING
+/*!
+    Sets the time to hour \a h, minute \a m, seconds \a s and
+    milliseconds \a ms.
+
+    \a h must be in the range 0 to 23, \a m and \a s must be in the
+    range 0 to 59, and \a ms must be in the range 0 to 999.
+    Returns true if the set time is valid; otherwise returns false.
+
+    \sa isValid()
+*/
+
+bool QTime::setHMS(int h, int m, int s, int ms)
+{
+#if defined(Q_OS_WINCE)
+    startTick = NullTime;
+#endif
+    if (!isValid(h,m,s,ms)) {
+        mds = NullTime;                // make this invalid
+        return false;
+    }
+    mds = (h*SECS_PER_HOUR + m*SECS_PER_MIN + s)*1000 + ms;
+    return true;
+}
+
+/*!
+    Returns a QTime object containing a time \a s seconds later
+    than the time of this object (or earlier if \a s is negative).
+
+    Note that the time will wrap if it passes midnight.
+
+    Example:
+
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 5
+
+    \sa addMSecs(), secsTo(), QDateTime::addSecs()
+*/
+
+QTime QTime::addSecs(int s) const
+{
+    return addMSecs(s * 1000);
+}
+
+/*!
+    Returns the number of seconds from this time to \a t.
+    If \a t is earlier than this time, the number of seconds returned
+    is negative.
+
+    Because QTime measures time within a day and there are 86400
+    seconds in a day, the result is always between -86400 and 86400.
+
+    secsTo() does not take into account any milliseconds.
+
+    \sa addSecs(), QDateTime::secsTo()
+*/
+
+int QTime::secsTo(const QTime &t) const
+{
+    return (t.ds() - ds()) / 1000;
+}
+
+/*!
+    Returns a QTime object containing a time \a ms milliseconds later
+    than the time of this object (or earlier if \a ms is negative).
+
+    Note that the time will wrap if it passes midnight. See addSecs()
+    for an example.
+
+    \sa addSecs(), msecsTo(), QDateTime::addMSecs()
+*/
+
+QTime QTime::addMSecs(int ms) const
+{
+    QTime t;
+    if (ms < 0) {
+        // % not well-defined for -ve, but / is.
+        int negdays = (MSECS_PER_DAY - ms) / MSECS_PER_DAY;
+        t.mds = (ds() + ms + negdays * MSECS_PER_DAY) % MSECS_PER_DAY;
+    } else {
+        t.mds = (ds() + ms) % MSECS_PER_DAY;
+    }
+#if defined(Q_OS_WINCE)
+    if (startTick > NullTime)
+        t.startTick = (startTick + ms) % MSECS_PER_DAY;
+#endif
+    return t;
+}
+
+/*!
+    Returns the number of milliseconds from this time to \a t.
+    If \a t is earlier than this time, the number of milliseconds returned
+    is negative.
+
+    Because QTime measures time within a day and there are 86400
+    seconds in a day, the result is always between -86400000 and
+    86400000 ms.
+
+    \sa secsTo(), addMSecs(), QDateTime::msecsTo()
+*/
+
+int QTime::msecsTo(const QTime &t) const
+{
+#if defined(Q_OS_WINCE)
+    // GetLocalTime() for Windows CE has no milliseconds resolution
+    if (t.startTick > NullTime && startTick > NullTime)
+        return t.startTick - startTick;
+    else
+#endif
+        return t.ds() - ds();
+}
+
+
+/*!
+    \fn bool QTime::operator==(const QTime &t) const
+
+    Returns true if this time is equal to \a t; otherwise returns false.
+*/
+
+/*!
+    \fn bool QTime::operator!=(const QTime &t) const
+
+    Returns true if this time is different from \a t; otherwise returns false.
+*/
+
+/*!
+    \fn bool QTime::operator<(const QTime &t) const
+
+    Returns true if this time is earlier than \a t; otherwise returns false.
+*/
+
+/*!
+    \fn bool QTime::operator<=(const QTime &t) const
+
+    Returns true if this time is earlier than or equal to \a t;
+    otherwise returns false.
+*/
+
+/*!
+    \fn bool QTime::operator>(const QTime &t) const
+
+    Returns true if this time is later than \a t; otherwise returns false.
+*/
+
+/*!
+    \fn bool QTime::operator>=(const QTime &t) const
+
+    Returns true if this time is later than or equal to \a t;
+    otherwise returns false.
+*/
+
+/*!
+    \fn QTime::currentTime()
+
+    Returns the current time as reported by the system clock.
+
+    Note that the accuracy depends on the accuracy of the underlying
+    operating system; not all systems provide 1-millisecond accuracy.
+*/
+
+#ifndef QT_NO_DATESTRING
+/*!
+    \fn QTime QTime::fromString(const QString &string, Qt::DateFormat format)
+
+    Returns the time represented in the \a string as a QTime using the
+    \a format given, or an invalid time if this is not possible.
+
+    Note that fromString() uses a "C" locale encoded string to convert
+    milliseconds to a float value. If the default locale is not "C",
+    this may result in two conversion attempts (if the conversion
+    fails for the default locale). This should be considered an
+    implementation detail.
+*/
+QTime QTime::fromString(const QString& s, Qt::DateFormat f)
+{
+    if (s.isEmpty()) {
+        QTime t;
+        t.mds = NullTime;
+        return t;
+    }
+
+    switch (f) {
+    case Qt::SystemLocaleDate:
+    case Qt::SystemLocaleShortDate:
+    case Qt::SystemLocaleLongDate:
+        return fromString(s, QLocale::system().timeFormat(f == Qt::SystemLocaleLongDate ? QLocale::LongFormat
+                                                                                        : QLocale::ShortFormat));
+    case Qt::LocaleDate:
+    case Qt::DefaultLocaleShortDate:
+    case Qt::DefaultLocaleLongDate:
+        return fromString(s, QLocale().timeFormat(f == Qt::DefaultLocaleLongDate ? QLocale::LongFormat
+                                                                                 : QLocale::ShortFormat));
+    default:
+        {
+            bool ok = true;
+            const int hour(s.mid(0, 2).toInt(&ok));
+            if (!ok)
+                return QTime();
+            const int minute(s.mid(3, 2).toInt(&ok));
+            if (!ok)
+                return QTime();
+            const int second(s.mid(6, 2).toInt(&ok));
+            if (!ok)
+                return QTime();
+            const QString msec_s(QLatin1String("0.") + s.mid(9, 4));
+            const float msec(msec_s.toFloat(&ok));
+            if (!ok)
+                return QTime(hour, minute, second, 0);
+            return QTime(hour, minute, second, qMin(qRound(msec * 1000.0), 999));
+        }
+    }
+}
+
+/*!
+    \fn QTime::fromString(const QString &string, const QString &format)
+
+    Returns the QTime represented by the \a string, using the \a
+    format given, or an invalid time if the string cannot be parsed.
+
+    These expressions may be used for the format:
+
+    \table
+    \header \i Expression \i Output
+    \row \i h
+         \i the hour without a leading zero (0 to 23 or 1 to 12 if AM/PM display)
+    \row \i hh
+         \i the hour with a leading zero (00 to 23 or 01 to 12 if AM/PM display)
+    \row \i m \i the minute without a leading zero (0 to 59)
+    \row \i mm \i the minute with a leading zero (00 to 59)
+    \row \i s \i the second without a leading zero (0 to 59)
+    \row \i ss \i the second with a leading zero (00 to 59)
+    \row \i z \i the milliseconds without leading zeroes (0 to 999)
+    \row \i zzz \i the milliseconds with leading zeroes (000 to 999)
+    \row \i AP
+         \i interpret as an AM/PM time. \e AP must be either "AM" or "PM".
+    \row \i ap
+         \i Interpret as an AM/PM time. \e ap must be either "am" or "pm".
+    \endtable
+
+    All other input characters will be treated as text. Any sequence
+    of characters that are enclosed in single quotes will also be
+    treated as text and not be used as an expression.
+
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 6
+
+    If the format is not satisfied an invalid QTime is returned.
+    Expressions that do not expect leading zeroes to be given (h, m, s
+    and z) are greedy. This means that they will use two digits even if
+    this puts them outside the range of accepted values and leaves too
+    few digits for other sections. For example, the following string
+    could have meant 00:07:10, but the m will grab two digits, resulting
+    in an invalid time:
+
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 7
+
+    Any field that is not represented in the format will be set to zero.
+    For example:
+
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 8
+
+    \sa QDateTime::fromString() QDate::fromString() QDate::toString()
+    QDateTime::toString() QTime::toString()
+*/
+
+QTime QTime::fromString(const QString &string, const QString &format)
+{
+    QTime time;
+#ifndef QT_BOOTSTRAPPED
+    QDateTimeParser dt(QVariant::Time, QDateTimeParser::FromString);
+    if (dt.parseFormat(format))
+        dt.fromString(string, 0, &time);
+#else
+    Q_UNUSED(string);
+    Q_UNUSED(format);
+#endif
+    return time;
+}
+
+#endif // QT_NO_DATESTRING
+
+
+/*!
+    \overload
+
+    Returns true if the specified time is valid; otherwise returns
+    false.
+
+    The time is valid if \a h is in the range 0 to 23, \a m and
+    \a s are in the range 0 to 59, and \a ms is in the range 0 to 999.
+
+    Example:
+
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 9
+*/
+
+bool QTime::isValid(int h, int m, int s, int ms)
+{
+    return (uint)h < 24 && (uint)m < 60 && (uint)s < 60 && (uint)ms < 1000;
+}
+
+
+/*!
+    Sets this time to the current time. This is practical for timing:
+
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 10
+
+    \sa restart(), elapsed(), currentTime()
+*/
+
+void QTime::start()
+{
+    *this = currentTime();
+}
+
+/*!
+    Sets this time to the current time and returns the number of
+    milliseconds that have elapsed since the last time start() or
+    restart() was called.
+
+    This function is guaranteed to be atomic and is thus very handy
+    for repeated measurements. Call start() to start the first
+    measurement, and restart() for each later measurement.
+
+    Note that the counter wraps to zero 24 hours after the last call
+    to start() or restart().
+
+    \warning If the system's clock setting has been changed since the
+    last time start() or restart() was called, the result is
+    undefined. This can happen when daylight savings time is turned on
+    or off.
+
+    \sa start(), elapsed(), currentTime()
+*/
+
+int QTime::restart()
+{
+    QTime t = currentTime();
+    int n = msecsTo(t);
+    if (n < 0)                                // passed midnight
+        n += 86400*1000;
+    *this = t;
+    return n;
+}
+
+/*!
+    Returns the number of milliseconds that have elapsed since the
+    last time start() or restart() was called.
+
+    Note that the counter wraps to zero 24 hours after the last call
+    to start() or restart.
+
+    Note that the accuracy depends on the accuracy of the underlying
+    operating system; not all systems provide 1-millisecond accuracy.
+
+    \warning If the system's clock setting has been changed since the
+    last time start() or restart() was called, the result is
+    undefined. This can happen when daylight savings time is turned on
+    or off.
+
+    \sa start(), restart()
+*/
+
+int QTime::elapsed() const
+{
+    int n = msecsTo(currentTime());
+    if (n < 0)                                // passed midnight
+        n += 86400 * 1000;
+    return n;
+}
+
+
+/*****************************************************************************
+  QDateTime member functions
+ *****************************************************************************/
+
+/*!
+    \class QDateTime
+    \reentrant
+    \brief The QDateTime class provides date and time functions.
+
+
+    A QDateTime object contains a calendar date and a clock time (a
+    "datetime"). It is a combination of the QDate and QTime classes.
+    It can read the current datetime from the system clock. It
+    provides functions for comparing datetimes and for manipulating a
+    datetime by adding a number of seconds, days, months, or years.
+
+    A QDateTime object is typically created either by giving a date
+    and time explicitly in the constructor, or by using the static
+    function currentDateTime() that returns a QDateTime object set
+    to the system clock's time. The date and time can be changed with
+    setDate() and setTime(). A datetime can also be set using the
+    setTime_t() function that takes a POSIX-standard "number of
+    seconds since 00:00:00 on January 1, 1970" value. The fromString()
+    function returns a QDateTime, given a string and a date format
+    used to interpret the date within the string.
+
+    The date() and time() functions provide access to the date and
+    time parts of the datetime. The same information is provided in
+    textual format by the toString() function.
+
+    QDateTime provides a full set of operators to compare two
+    QDateTime objects where smaller means earlier and larger means
+    later.
+
+    You can increment (or decrement) a datetime by a given number of
+    milliseconds using addMSecs(), seconds using addSecs(), or days
+    using addDays(). Similarly you can use addMonths() and addYears().
+    The daysTo() function returns the number of days between two datetimes,
+    secsTo() returns the number of seconds between two datetimes, and
+    msecsTo() returns the number of milliseconds between two datetimes.
+
+    QDateTime can store datetimes as \l{Qt::LocalTime}{local time} or
+    as \l{Qt::UTC}{UTC}. QDateTime::currentDateTime() returns a
+    QDateTime expressed as local time; use toUTC() to convert it to
+    UTC. You can also use timeSpec() to find out if a QDateTime
+    object stores a UTC time or a local time. Operations such as
+    addSecs() and secsTo() are aware of daylight saving time (DST).
+
+    \note QDateTime does not account for leap seconds.
+
+    \section1
+
+    \target QDateTime G and J
+    \section2 Use of Gregorian and Julian Calendars
+
+    QDate uses the Gregorian calendar in all locales, beginning
+    on the date 15 October 1582. For dates up to and including 4
+    October 1582, the Julian calendar is used.  This means there is a
+    10-day gap in the internal calendar between the 4th and the 15th
+    of October 1582. When you use QDateTime for dates in that epoch,
+    the day after 4 October 1582 is 15 October 1582, and the dates in
+    the gap are invalid.
+
+    The Julian to Gregorian changeover date used here is the date when
+    the Gregorian calendar was first introduced, by Pope Gregory
+    XIII. That change was not universally accepted and some localities
+    only executed it at a later date (if at all).  QDateTime
+    doesn't take any of these historical facts into account. If an
+    application must support a locale-specific dating system, it must
+    do so on its own, remembering to convert the dates using the
+    Julian day.
+
+    \section2 No Year 0
+
+    There is no year 0. Dates in that year are considered invalid. The
+    year -1 is the year "1 before Christ" or "1 before current era."
+    The day before 0001-01-01 is December 31st, 1 BCE.
+
+    \section2 Range of Valid Dates
+
+    The range of valid dates is from January 2nd, 4713 BCE, to
+    sometime in the year 11 million CE. The Julian Day returned by
+    QDate::toJulianDay() is a number in the contiguous range from 1 to
+    \e{overflow}, even across QDateTime's "date holes". It is suitable
+    for use in applications that must convert a QDateTime to a date in
+    another calendar system, e.g., Hebrew, Islamic or Chinese.
+
+    The Gregorian calendar was introduced in different places around
+    the world on different dates. QDateTime uses QDate to store the
+    date, so it uses the Gregorian calendar for all locales, beginning
+    on the date 15 October 1582. For dates up to and including 4
+    October 1582, QDateTime uses the Julian calendar.  This means
+    there is a 10-day gap in the QDateTime calendar between the 4th
+    and the 15th of October 1582. When you use QDateTime for dates in
+    that epoch, the day after 4 October 1582 is 15 October 1582, and
+    the dates in the gap are invalid.
+
+    \section2
+    Use of System Timezone
+
+    QDateTime uses the system's time zone information to determine the
+    offset of local time from UTC. If the system is not configured
+    correctly or not up-to-date, QDateTime will give wrong results as
+    well.
+
+    \section2 Daylight Savings Time (DST)
+
+    QDateTime takes into account the system's time zone information
+    when dealing with DST. On modern Unix systems, this means it
+    applies the correct historical DST data whenever possible. On
+    Windows and Windows CE, where the system doesn't support
+    historical DST data, historical accuracy is not maintained with
+    respect to DST.
+
+    The range of valid dates taking DST into account is 1970-01-01 to
+    the present, and rules are in place for handling DST correctly
+    until 2037-12-31, but these could change. For dates falling
+    outside that range, QDateTime makes a \e{best guess} using the
+    rules for year 1970 or 2037, but we can't guarantee accuracy. This
+    means QDateTime doesn't take into account changes in a locale's
+    time zone before 1970, even if the system's time zone database
+    supports that information.
+
+    \sa QDate QTime QDateTimeEdit
+*/
+
+/*!
+    Constructs a null datetime (i.e. null date and null time). A null
+    datetime is invalid, since the date is invalid.
+
+    \sa isValid()
+*/
+QDateTime::QDateTime()
+    : d(new QDateTimePrivate)
+{
+}
+
+
+/*!
+    Constructs a datetime with the given \a date, a valid
+    time(00:00:00.000), and sets the timeSpec() to Qt::LocalTime.
+*/
+
+QDateTime::QDateTime(const QDate &date)
+    : d(new QDateTimePrivate)
+{
+    d->date = date;
+    d->time = QTime(0, 0, 0);
+}
+
+/*!
+    Constructs a datetime with the given \a date and \a time, using
+    the time specification defined by \a spec.
+
+    If \a date is valid and \a time is not, the time will be set to midnight.
+*/
+
+QDateTime::QDateTime(const QDate &date, const QTime &time, Qt::TimeSpec spec)
+    : d(new QDateTimePrivate)
+{
+    d->date = date;
+    d->time = date.isValid() && !time.isValid() ? QTime(0, 0, 0) : time;
+    d->spec = (spec == Qt::UTC) ? QDateTimePrivate::UTC : QDateTimePrivate::LocalUnknown;
+}
+
+/*!
+    Constructs a copy of the \a other datetime.
+*/
+
+QDateTime::QDateTime(const QDateTime &other)
+    : d(other.d)
+{
+}
+
+/*!
+    Destroys the datetime.
+*/
+QDateTime::~QDateTime()
+{
+}
+
+/*!
+    Makes a copy of the \a other datetime and returns a reference to the
+    copy.
+*/
+
+QDateTime &QDateTime::operator=(const QDateTime &other)
+{
+    d = other.d;
+    return *this;
+}
+
+/*!
+    Returns true if both the date and the time are null; otherwise
+    returns false. A null datetime is invalid.
+
+    \sa QDate::isNull(), QTime::isNull(), isValid()
+*/
+
+bool QDateTime::isNull() const
+{
+    return d->date.isNull() && d->time.isNull();
+}
+
+/*!
+    Returns true if both the date and the time are valid; otherwise
+    returns false.
+
+    \sa QDate::isValid(), QTime::isValid()
+*/
+
+bool QDateTime::isValid() const
+{
+    return d->date.isValid() && d->time.isValid();
+}
+
+/*!
+    Returns the date part of the datetime.
+
+    \sa setDate(), time(), timeSpec()
+*/
+
+QDate QDateTime::date() const
+{
+    return d->date;
+}
+
+/*!
+    Returns the time part of the datetime.
+
+    \sa setTime(), date(), timeSpec()
+*/
+
+QTime QDateTime::time() const
+{
+    return d->time;
+}
+
+/*!
+    Returns the time specification of the datetime.
+
+    \sa setTimeSpec(), date(), time(), Qt::TimeSpec
+*/
+
+Qt::TimeSpec QDateTime::timeSpec() const
+{
+    switch(d->spec)
+    {
+        case QDateTimePrivate::UTC:
+            return Qt::UTC;
+        case QDateTimePrivate::OffsetFromUTC:
+            return Qt::OffsetFromUTC;
+        default:
+            return Qt::LocalTime;
+    }
+}
+
+/*!
+    Sets the date part of this datetime to \a date.
+    If no time is set, it is set to midnight.
+
+    \sa date(), setTime(), setTimeSpec()
+*/
+
+void QDateTime::setDate(const QDate &date)
+{
+    detach();
+    d->date = date;
+    if (d->spec == QDateTimePrivate::LocalStandard
+        || d->spec == QDateTimePrivate::LocalDST)
+        d->spec = QDateTimePrivate::LocalUnknown;
+    if (date.isValid() && !d->time.isValid())
+        d->time = QTime(0, 0, 0);
+}
+
+/*!
+    Sets the time part of this datetime to \a time.
+
+    \sa time(), setDate(), setTimeSpec()
+*/
+
+void QDateTime::setTime(const QTime &time)
+{
+    detach();
+    if (d->spec == QDateTimePrivate::LocalStandard
+        || d->spec == QDateTimePrivate::LocalDST)
+        d->spec = QDateTimePrivate::LocalUnknown;
+    d->time = time;
+}
+
+/*!
+    Sets the time specification used in this datetime to \a spec.
+
+    \sa timeSpec(), setDate(), setTime(), Qt::TimeSpec
+*/
+
+void QDateTime::setTimeSpec(Qt::TimeSpec spec)
+{
+    detach();
+
+    switch(spec)
+    {
+        case Qt::UTC:
+            d->spec = QDateTimePrivate::UTC;
+            break;
+        case Qt::OffsetFromUTC:
+            d->spec = QDateTimePrivate::OffsetFromUTC;
+            break;
+        default:
+            d->spec = QDateTimePrivate::LocalUnknown;
+            break;
+    }
+}
+
+qint64 toMSecsSinceEpoch_helper(qint64 jd, int msecs)
+{
+    qint64 days = jd - JULIAN_DAY_FOR_EPOCH;
+    qint64 retval = (days * MSECS_PER_DAY) + msecs;
+    return retval;
+}
+
+/*!
+    \since 4.7
+
+    Returns the datetime as the number of milliseconds that have passed
+    since 1970-01-01T00:00:00.000, Coordinated Universal Time (Qt::UTC).
+
+    On systems that do not support time zones, this function will
+    behave as if local time were Qt::UTC.
+
+    The behavior for this function is undefined if the datetime stored in
+    this object is not valid. However, for all valid dates, this function
+    returns a unique value.
+
+    \sa toTime_t(), setMSecsSinceEpoch()
+*/
+qint64 QDateTime::toMSecsSinceEpoch() const
+{
+    QDate utcDate;
+    QTime utcTime;
+    d->getUTC(utcDate, utcTime);
+
+    return toMSecsSinceEpoch_helper(utcDate.jd, utcTime.ds());
+}
+
+/*!
+    Returns the datetime as the number of seconds that have passed
+    since 1970-01-01T00:00:00, Coordinated Universal Time (Qt::UTC).
+
+    On systems that do not support time zones, this function will
+    behave as if local time were Qt::UTC.
+
+    \note This function returns a 32-bit unsigned integer, so it does not
+    support dates before 1970, but it does support dates after
+    2038-01-19T03:14:06, which may not be valid time_t values. Be careful
+    when passing those time_t values to system functions, which could
+    interpret them as negative dates.
+
+    If the date is outside the range 1970-01-01T00:00:00 to
+    2106-02-07T06:28:14, this function returns -1 cast to an unsigned integer
+    (i.e., 0xFFFFFFFF).
+
+    To get an extended range, use toMSecsSinceEpoch().
+
+    \sa toMSecsSinceEpoch(), setTime_t()
+*/
+
+uint QDateTime::toTime_t() const
+{
+    qint64 retval = toMSecsSinceEpoch() / 1000;
+    if (quint64(retval) >= Q_UINT64_C(0xFFFFFFFF))
+        return uint(-1);
+    return uint(retval);
+}
+
+/*!
+    \since 4.7
+
+    Sets the date and time given the number of milliseconds,\a msecs, that have
+    passed since 1970-01-01T00:00:00.000, Coordinated Universal Time
+    (Qt::UTC). On systems that do not support time zones this function
+    will behave as if local time were Qt::UTC.
+
+    Note that there are possible values for \a msecs that lie outside the
+    valid range of QDateTime, both negative and positive. The behavior of
+    this function is undefined for those values.
+
+    \sa toMSecsSinceEpoch(), setTime_t()
+*/
+void QDateTime::setMSecsSinceEpoch(qint64 msecs)
+{
+    detach();
+
+    QDateTimePrivate::Spec oldSpec = d->spec;
+
+    int ddays = msecs / MSECS_PER_DAY;
+    msecs %= MSECS_PER_DAY;
+    if (msecs < 0) {
+        // negative
+        --ddays;
+        msecs += MSECS_PER_DAY;
+    }
+
+    d->date = QDate(1970, 1, 1).addDays(ddays);
+    d->time = QTime().addMSecs(msecs);
+    d->spec = QDateTimePrivate::UTC;
+
+    if (oldSpec != QDateTimePrivate::UTC)
+        d->spec = d->getLocal(d->date, d->time);
+}
+
+/*!
+    \fn void QDateTime::setTime_t(uint seconds)
+
+    Sets the date and time given the number of \a seconds that have
+    passed since 1970-01-01T00:00:00, Coordinated Universal Time
+    (Qt::UTC). On systems that do not support time zones this function
+    will behave as if local time were Qt::UTC.
+
+    \sa toTime_t()
+*/
+
+void QDateTime::setTime_t(uint secsSince1Jan1970UTC)
+{
+    detach();
+
+    QDateTimePrivate::Spec oldSpec = d->spec;
+
+    d->date = QDate(1970, 1, 1).addDays(secsSince1Jan1970UTC / SECS_PER_DAY);
+    d->time = QTime().addSecs(secsSince1Jan1970UTC % SECS_PER_DAY);
+    d->spec = QDateTimePrivate::UTC;
+
+    if (oldSpec != QDateTimePrivate::UTC)
+        d->spec = d->getLocal(d->date, d->time);
+}
+
+#ifndef QT_NO_DATESTRING
+/*!
+    \fn QString QDateTime::toString(Qt::DateFormat format) const
+
+    \overload
+
+    Returns the datetime as a string in the \a format given.
+
+    If the \a format is Qt::TextDate, the string is formatted in
+    the default way. QDate::shortDayName(), QDate::shortMonthName(),
+    and QTime::toString() are used to generate the string, so the
+    day and month names will be localized names. An example of this
+    formatting is "Wed May 20 03:40:13 1998".
+
+    If the \a format is Qt::ISODate, the string format corresponds
+    to the ISO 8601 extended specification for representations of
+    dates and times, taking the form YYYY-MM-DDTHH:MM:SS.
+
+    If the \a format is Qt::SystemLocaleShortDate or
+    Qt::SystemLocaleLongDate, the string format depends on the locale
+    settings of the system. Identical to calling
+    QLocale::system().toString(datetime, QLocale::ShortFormat) or
+    QLocale::system().toString(datetime, QLocale::LongFormat).
+
+    If the \a format is Qt::DefaultLocaleShortDate or
+    Qt::DefaultLocaleLongDate, the string format depends on the
+    default application locale. This is the locale set with
+    QLocale::setDefault(), or the system locale if no default locale
+    has been set. Identical to calling QLocale().toString(datetime,
+    QLocale::ShortFormat) or QLocale().toString(datetime,
+    QLocale::LongFormat).
+
+    If the datetime is invalid, an empty string will be returned.
+
+    \warning The Qt::ISODate format is only valid for years in the
+    range 0 to 9999. This restriction may apply to locale-aware
+    formats as well, depending on the locale settings.
+
+    \sa QDate::toString() QTime::toString() Qt::DateFormat
+*/
+
+QString QDateTime::toString(Qt::DateFormat f) const
+{
+    QString buf;
+    if (!isValid())
+        return buf;
+
+    if (f == Qt::ISODate) {
+        buf = d->date.toString(Qt::ISODate);
+        if (buf.isEmpty())
+            return QString();   // failed to convert
+        buf += QLatin1Char('T');
+        buf += d->time.toString(Qt::ISODate);
+    }
+#ifndef QT_NO_TEXTDATE
+    else if (f == Qt::TextDate) {
+#ifndef Q_WS_WIN
+        buf = d->date.shortDayName(d->date.dayOfWeek());
+        buf += QLatin1Char(' ');
+        buf += d->date.shortMonthName(d->date.month());
+        buf += QLatin1Char(' ');
+        buf += QString::number(d->date.day());
+#else
+        wchar_t out[255];
+        GetLocaleInfo(LOCALE_USER_DEFAULT, LOCALE_ILDATE, out, 255);
+        QString winstr = QString::fromWCharArray(out);
+        switch (winstr.toInt()) {
+        case 1:
+            buf = d->date.shortDayName(d->date.dayOfWeek());
+            buf += QLatin1Char(' ');
+            buf += QString::number(d->date.day());
+            buf += QLatin1String(". ");
+            buf += d->date.shortMonthName(d->date.month());
+            break;
+        default:
+            buf = d->date.shortDayName(d->date.dayOfWeek());
+            buf += QLatin1Char(' ');
+            buf += d->date.shortMonthName(d->date.month());
+            buf += QLatin1Char(' ');
+            buf += QString::number(d->date.day());
+        }
+#endif
+        buf += QLatin1Char(' ');
+        buf += d->time.toString();
+        buf += QLatin1Char(' ');
+        buf += QString::number(d->date.year());
+    }
+#endif
+    else {
+        buf = d->date.toString(f);
+        if (buf.isEmpty())
+            return QString();   // failed to convert
+        buf += QLatin1Char(' ');
+        buf += d->time.toString(f);
+    }
+
+    return buf;
+}
+
+/*!
+    Returns the datetime as a string. The \a format parameter
+    determines the format of the result string.
+
+    These expressions may be used for the date:
+
+    \table
+    \header \i Expression \i Output
+    \row \i d \i the day as number without a leading zero (1 to 31)
+    \row \i dd \i the day as number with a leading zero (01 to 31)
+    \row \i ddd
+            \i the abbreviated localized day name (e.g. 'Mon' to 'Sun').
+            Uses QDate::shortDayName().
+    \row \i dddd
+            \i the long localized day name (e.g. 'Monday' to 'Qt::Sunday').
+            Uses QDate::longDayName().
+    \row \i M \i the month as number without a leading zero (1-12)
+    \row \i MM \i the month as number with a leading zero (01-12)
+    \row \i MMM
+            \i the abbreviated localized month name (e.g. 'Jan' to 'Dec').
+            Uses QDate::shortMonthName().
+    \row \i MMMM
+            \i the long localized month name (e.g. 'January' to 'December').
+            Uses QDate::longMonthName().
+    \row \i yy \i the year as two digit number (00-99)
+    \row \i yyyy \i the year as four digit number
+    \endtable
+
+    These expressions may be used for the time:
+
+    \table
+    \header \i Expression \i Output
+    \row \i h
+         \i the hour without a leading zero (0 to 23 or 1 to 12 if AM/PM display)
+    \row \i hh
+         \i the hour with a leading zero (00 to 23 or 01 to 12 if AM/PM display)
+    \row \i m \i the minute without a leading zero (0 to 59)
+    \row \i mm \i the minute with a leading zero (00 to 59)
+    \row \i s \i the second without a leading zero (0 to 59)
+    \row \i ss \i the second with a leading zero (00 to 59)
+    \row \i z \i the milliseconds without leading zeroes (0 to 999)
+    \row \i zzz \i the milliseconds with leading zeroes (000 to 999)
+    \row \i AP
+            \i use AM/PM display. \e AP will be replaced by either "AM" or "PM".
+    \row \i ap
+            \i use am/pm display. \e ap will be replaced by either "am" or "pm".
+    \endtable
+
+    All other input characters will be ignored. Any sequence of characters that
+    are enclosed in singlequotes will be treated as text and not be used as an
+    expression. Two consecutive singlequotes ("''") are replaced by a singlequote
+    in the output.
+
+    Example format strings (assumed that the QDateTime is 21 May 2001
+    14:13:09):
+
+    \table
+    \header \i Format       \i Result
+    \row \i dd.MM.yyyy      \i 21.05.2001
+    \row \i ddd MMMM d yy   \i Tue May 21 01
+    \row \i hh:mm:ss.zzz    \i 14:13:09.042
+    \row \i h:m:s ap        \i 2:13:9 pm
+    \endtable
+
+    If the datetime is invalid, an empty string will be returned.
+
+    \sa QDate::toString() QTime::toString()
+*/
+QString QDateTime::toString(const QString& format) const
+{
+    return fmtDateTime(format, &d->time, &d->date);
+}
+#endif //QT_NO_DATESTRING
+
+/*!
+    Returns a QDateTime object containing a datetime \a ndays days
+    later than the datetime of this object (or earlier if \a ndays is
+    negative).
+
+    \sa daysTo(), addMonths(), addYears(), addSecs()
+*/
+
+QDateTime QDateTime::addDays(int ndays) const
+{
+    return QDateTime(d->date.addDays(ndays), d->time, timeSpec());
+}
+
+/*!
+    Returns a QDateTime object containing a datetime \a nmonths months
+    later than the datetime of this object (or earlier if \a nmonths
+    is negative).
+
+    \sa daysTo(), addDays(), addYears(), addSecs()
+*/
+
+QDateTime QDateTime::addMonths(int nmonths) const
+{
+    return QDateTime(d->date.addMonths(nmonths), d->time, timeSpec());
+}
+
+/*!
+    Returns a QDateTime object containing a datetime \a nyears years
+    later than the datetime of this object (or earlier if \a nyears is
+    negative).
+
+    \sa daysTo(), addDays(), addMonths(), addSecs()
+*/
+
+QDateTime QDateTime::addYears(int nyears) const
+{
+    return QDateTime(d->date.addYears(nyears), d->time, timeSpec());
+}
+
+QDateTime QDateTimePrivate::addMSecs(const QDateTime &dt, qint64 msecs)
+{
+    QDate utcDate;
+    QTime utcTime;
+    dt.d->getUTC(utcDate, utcTime);
+
+    addMSecs(utcDate, utcTime, msecs);
+
+    return QDateTime(utcDate, utcTime, Qt::UTC).toTimeSpec(dt.timeSpec());
+}
+
+/*!
+ Adds \a msecs to utcDate and \a utcTime as appropriate. It is assumed that
+ utcDate and utcTime are adjusted to UTC.
+
+ \since 4.5
+ \internal
+ */
+void QDateTimePrivate::addMSecs(QDate &utcDate, QTime &utcTime, qint64 msecs)
+{
+    uint dd = utcDate.jd;
+    int tt = utcTime.ds();
+    int sign = 1;
+    if (msecs < 0) {
+        msecs = -msecs;
+        sign = -1;
+    }
+    if (msecs >= int(MSECS_PER_DAY)) {
+        dd += sign * (msecs / MSECS_PER_DAY);
+        msecs %= MSECS_PER_DAY;
+    }
+
+    tt += sign * msecs;
+    if (tt < 0) {
+        tt = MSECS_PER_DAY - tt - 1;
+        dd -= tt / MSECS_PER_DAY;
+        tt = tt % MSECS_PER_DAY;
+        tt = MSECS_PER_DAY - tt - 1;
+    } else if (tt >= int(MSECS_PER_DAY)) {
+        dd += tt / MSECS_PER_DAY;
+        tt = tt % MSECS_PER_DAY;
+    }
+
+    utcDate.jd = dd;
+    utcTime.mds = tt;
+}
+
+/*!
+    Returns a QDateTime object containing a datetime \a s seconds
+    later than the datetime of this object (or earlier if \a s is
+    negative).
+
+    \sa addMSecs(), secsTo(), addDays(), addMonths(), addYears()
+*/
+
+QDateTime QDateTime::addSecs(int s) const
+{
+    return d->addMSecs(*this, qint64(s) * 1000);
+}
+
+/*!
+    Returns a QDateTime object containing a datetime \a msecs miliseconds
+    later than the datetime of this object (or earlier if \a msecs is
+    negative).
+
+    \sa addSecs(), msecsTo(), addDays(), addMonths(), addYears()
+*/
+QDateTime QDateTime::addMSecs(qint64 msecs) const
+{
+    return d->addMSecs(*this, msecs);
+}
+
+/*!
+    Returns the number of days from this datetime to the \a other
+    datetime. If the \a other datetime is earlier than this datetime,
+    the value returned is negative.
+
+    \sa addDays(), secsTo(), msecsTo()
+*/
+
+int QDateTime::daysTo(const QDateTime &other) const
+{
+    return d->date.daysTo(other.d->date);
+}
+
+/*!
+    Returns the number of seconds from this datetime to the \a other
+    datetime. If the \a other datetime is earlier than this datetime,
+    the value returned is negative.
+
+    Before performing the comparison, the two datetimes are converted
+    to Qt::UTC to ensure that the result is correct if one of the two
+    datetimes has daylight saving time (DST) and the other doesn't.
+
+    Example:
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 11
+
+    \sa addSecs(), daysTo(), QTime::secsTo()
+*/
+
+int QDateTime::secsTo(const QDateTime &other) const
+{
+    QDate date1, date2;
+    QTime time1, time2;
+
+    d->getUTC(date1, time1);
+    other.d->getUTC(date2, time2);
+
+    return (date1.daysTo(date2) * SECS_PER_DAY) + time1.secsTo(time2);
+}
+
+/*!
+    Returns the number of milliseconds from this datetime to the \a other
+    datetime. If the \a other datetime is earlier than this datetime,
+    the value returned is negative.
+
+    Before performing the comparison, the two datetimes are converted
+    to Qt::UTC to ensure that the result is correct if one of the two
+    datetimes has daylight saving time (DST) and the other doesn't.
+
+    \sa addMSecs(), daysTo(), QTime::msecsTo()
+*/
+
+qint64 QDateTime::msecsTo(const QDateTime &other) const
+{
+    QDate selfDate;
+    QDate otherDate;
+    QTime selfTime;
+    QTime otherTime;
+
+    d->getUTC(selfDate, selfTime);
+    other.d->getUTC(otherDate, otherTime);
+
+    return (static_cast<qint64>(selfDate.daysTo(otherDate)) * static_cast<qint64>(MSECS_PER_DAY))
+           + static_cast<qint64>(selfTime.msecsTo(otherTime));
+}
+
+
+/*!
+    \fn QDateTime QDateTime::toTimeSpec(Qt::TimeSpec specification) const
+
+    Returns a copy of this datetime configured to use the given time
+    \a specification.
+
+    \sa timeSpec(), toUTC(), toLocalTime()
+*/
+
+QDateTime QDateTime::toTimeSpec(Qt::TimeSpec spec) const
+{
+    if ((d->spec == QDateTimePrivate::UTC) == (spec == Qt::UTC))
+        return *this;
+
+    QDateTime ret;
+    if (spec == Qt::UTC) {
+        d->getUTC(ret.d->date, ret.d->time);
+        ret.d->spec = QDateTimePrivate::UTC;
+    } else {
+        ret.d->spec = d->getLocal(ret.d->date, ret.d->time);
+    }
+    return ret;
+}
+
+/*!
+    Returns true if this datetime is equal to the \a other datetime;
+    otherwise returns false.
+
+    \sa operator!=()
+*/
+
+bool QDateTime::operator==(const QDateTime &other) const
+{
+    if (d->spec == other.d->spec && d->utcOffset == other.d->utcOffset)
+        return d->time == other.d->time && d->date == other.d->date;
+    else {
+        QDate date1, date2;
+        QTime time1, time2;
+
+        d->getUTC(date1, time1);
+        other.d->getUTC(date2, time2);
+        return time1 == time2 && date1 == date2;
+    }
+}
+
+/*!
+    \fn bool QDateTime::operator!=(const QDateTime &other) const
+
+    Returns true if this datetime is different from the \a other
+    datetime; otherwise returns false.
+
+    Two datetimes are different if either the date, the time, or the
+    time zone components are different.
+
+    \sa operator==()
+*/
+
+/*!
+    Returns true if this datetime is earlier than the \a other
+    datetime; otherwise returns false.
+*/
+
+bool QDateTime::operator<(const QDateTime &other) const
+{
+    if (d->spec == other.d->spec && d->spec != QDateTimePrivate::OffsetFromUTC) {
+        if (d->date != other.d->date)
+            return d->date < other.d->date;
+        return d->time < other.d->time;
+    } else {
+        QDate date1, date2;
+        QTime time1, time2;
+        d->getUTC(date1, time1);
+        other.d->getUTC(date2, time2);
+        if (date1 != date2)
+            return date1 < date2;
+        return time1 < time2;
+    }
+}
+
+/*!
+    \fn bool QDateTime::operator<=(const QDateTime &other) const
+
+    Returns true if this datetime is earlier than or equal to the
+    \a other datetime; otherwise returns false.
+*/
+
+/*!
+    \fn bool QDateTime::operator>(const QDateTime &other) const
+
+    Returns true if this datetime is later than the \a other datetime;
+    otherwise returns false.
+*/
+
+/*!
+    \fn bool QDateTime::operator>=(const QDateTime &other) const
+
+    Returns true if this datetime is later than or equal to the
+    \a other datetime; otherwise returns false.
+*/
+
+/*!
+    \fn QDateTime QDateTime::currentDateTime()
+    Returns the current datetime, as reported by the system clock, in
+    the local time zone.
+
+    \sa currentDateTimeUtc(), QDate::currentDate(), QTime::currentTime(), toTimeSpec()
+*/
+
+/*!
+    \fn QDateTime QDateTime::currentDateTimeUtc()
+    \since 4.7
+    Returns the current datetime, as reported by the system clock, in
+    UTC.
+
+    \sa currentDateTime(), QDate::currentDate(), QTime::currentTime(), toTimeSpec()
+*/
+
+/*!
+    \fn qint64 QDateTime::currentMSecsSinceEpoch()
+    \since 4.7
+
+    Returns the number of milliseconds since 1970-01-01T00:00:00 Universal
+    Coordinated Time. This number is like the POSIX time_t variable, but
+    expressed in milliseconds instead.
+
+    \sa currentDateTime(), currentDateTimeUtc(), toTime_t(), toTimeSpec()
+*/
+
+static inline uint msecsFromDecomposed(int hour, int minute, int sec, int msec = 0)
+{
+    return MSECS_PER_HOUR * hour + MSECS_PER_MIN * minute + 1000 * sec + msec;
+}
+
+#if defined(Q_OS_WIN)
+QDate QDate::currentDate()
+{
+    QDate d;
+    SYSTEMTIME st;
+    memset(&st, 0, sizeof(SYSTEMTIME));
+    GetLocalTime(&st);
+    d.jd = julianDayFromDate(st.wYear, st.wMonth, st.wDay);
+    return d;
+}
+
+QTime QTime::currentTime()
+{
+    QTime ct;
+    SYSTEMTIME st;
+    memset(&st, 0, sizeof(SYSTEMTIME));
+    GetLocalTime(&st);
+    ct.mds = msecsFromDecomposed(st.wHour, st.wMinute, st.wSecond, st.wMilliseconds);
+#if defined(Q_OS_WINCE)
+    ct.startTick = GetTickCount() % MSECS_PER_DAY;
+#endif
+    return ct;
+}
+
+QDateTime QDateTime::currentDateTime()
+{
+    QDate d;
+    QTime t;
+    SYSTEMTIME st;
+    memset(&st, 0, sizeof(SYSTEMTIME));
+    GetLocalTime(&st);
+    d.jd = julianDayFromDate(st.wYear, st.wMonth, st.wDay);
+    t.mds = msecsFromDecomposed(st.wHour, st.wMinute, st.wSecond, st.wMilliseconds);
+    return QDateTime(d, t);
+}
+
+QDateTime QDateTime::currentDateTimeUtc()
+{
+    QDate d;
+    QTime t;
+    SYSTEMTIME st;
+    memset(&st, 0, sizeof(SYSTEMTIME));
+    GetSystemTime(&st);
+    d.jd = julianDayFromDate(st.wYear, st.wMonth, st.wDay);
+    t.mds = msecsFromDecomposed(st.wHour, st.wMinute, st.wSecond, st.wMilliseconds);
+    return QDateTime(d, t, Qt::UTC);
+}
+
+qint64 QDateTime::currentMSecsSinceEpoch()
+{
+    QDate d;
+    QTime t;
+    SYSTEMTIME st;
+    memset(&st, 0, sizeof(SYSTEMTIME));
+    GetSystemTime(&st);
+
+    return msecsFromDecomposed(st.wHour, st.wMinute, st.wSecond, st.wMilliseconds) +
+            qint64(julianDayFromGregorianDate(st.wYear, st.wMonth, st.wDay)
+                   - julianDayFromGregorianDate(1970, 1, 1)) * Q_INT64_C(86400000);
+}
+
+#elif defined(Q_OS_SYMBIAN)
+QDate QDate::currentDate()
+{
+    QDate d;
+    TTime localTime;
+    localTime.HomeTime();
+    TDateTime localDateTime = localTime.DateTime();
+    // months and days are zero indexed
+    d.jd = julianDayFromDate(localDateTime.Year(), localDateTime.Month() + 1, localDateTime.Day() + 1 );
+    return d;
+}
+
+QTime QTime::currentTime()
+{
+    QTime ct;
+    TTime localTime;
+    localTime.HomeTime();
+    TDateTime localDateTime = localTime.DateTime();
+    ct.mds = msecsFromDecomposed(localDateTime.Hour(), localDateTime.Minute(),
+                                 localDateTime.Second(), localDateTime.MicroSecond() / 1000);
+    return ct;
+}
+
+QDateTime QDateTime::currentDateTime()
+{
+    QDate d;
+    QTime ct;
+    TTime localTime;
+    localTime.HomeTime();
+    TDateTime localDateTime = localTime.DateTime();
+    // months and days are zero indexed
+    d.jd = julianDayFromDate(localDateTime.Year(), localDateTime.Month() + 1, localDateTime.Day() + 1);
+    ct.mds = msecsFromDecomposed(localDateTime.Hour(), localDateTime.Minute(),
+                                 localDateTime.Second(), localDateTime.MicroSecond() / 1000);
+    return QDateTime(d, ct);
+}
+
+QDateTime QDateTime::currentDateTimeUtc()
+{
+    QDate d;
+    QTime ct;
+    TTime gmTime;
+    gmTime.UniversalTime();
+    TDateTime gmtDateTime = gmTime.DateTime();
+    // months and days are zero indexed
+    d.jd = julianDayFromDate(gmtDateTime.Year(), gmtDateTime.Month() + 1, gmtDateTime.Day() + 1);
+    ct.mds = msecsFromDecomposed(gmtDateTime.Hour(), gmtDateTime.Minute(),
+                                 gmtDateTime.Second(), gmtDateTime.MicroSecond() / 1000);
+    return QDateTime(d, ct, Qt::UTC);
+}
+
+qint64 QDateTime::currentMSecsSinceEpoch()
+{
+    QDate d;
+    QTime ct;
+    TTime gmTime;
+    gmTime.UniversalTime();
+    TDateTime gmtDateTime = gmTime.DateTime();
+
+    // according to the documentation, the value is:
+    // "a date and time as a number of microseconds since midnight, January 1st, 0 AD nominal Gregorian"
+    qint64 value = gmTime.Int64();
+
+    // whereas 1970-01-01T00:00:00 is (in the same representation):
+    //   ((1970 * 365) + (1970 / 4) - (1970 / 100) + (1970 / 400) - 13) * 86400 * 1000000
+    static const qint64 unixEpoch = Q_INT64_C(0xdcddb30f2f8000);
+
+    return (value - unixEpoch) / 1000;
+}
+
+#elif defined(Q_OS_UNIX)
+QDate QDate::currentDate()
+{
+    QDate d;
+    // posix compliant system
+    time_t ltime;
+    time(&ltime);
+    struct tm *t = 0;
+
+#if !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS)
+    // use the reentrant version of localtime() where available
+    tzset();
+    struct tm res;
+    t = localtime_r(&ltime, &res);
+#else
+    t = localtime(&ltime);
+#endif // !QT_NO_THREAD && _POSIX_THREAD_SAFE_FUNCTIONS
+
+    d.jd = julianDayFromDate(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday);
+    return d;
+}
+
+QTime QTime::currentTime()
+{
+    QTime ct;
+    // posix compliant system
+    struct timeval tv;
+    gettimeofday(&tv, 0);
+    time_t ltime = tv.tv_sec;
+    struct tm *t = 0;
+
+#if !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS)
+    // use the reentrant version of localtime() where available
+    tzset();
+    struct tm res;
+    t = localtime_r(&ltime, &res);
+#else
+    t = localtime(&ltime);
+#endif
+    Q_CHECK_PTR(t);
+
+    ct.mds = msecsFromDecomposed(t->tm_hour, t->tm_min, t->tm_sec, tv.tv_usec / 1000);
+    return ct;
+}
+
+QDateTime QDateTime::currentDateTime()
+{
+    // posix compliant system
+    // we have milliseconds
+    struct timeval tv;
+    gettimeofday(&tv, 0);
+    time_t ltime = tv.tv_sec;
+    struct tm *t = 0;
+
+#if !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS)
+    // use the reentrant version of localtime() where available
+    tzset();
+    struct tm res;
+    t = localtime_r(&ltime, &res);
+#else
+    t = localtime(&ltime);
+#endif
+
+    QDateTime dt;
+    dt.d->time.mds = msecsFromDecomposed(t->tm_hour, t->tm_min, t->tm_sec, tv.tv_usec / 1000);
+
+    dt.d->date.jd = julianDayFromDate(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday);
+    dt.d->spec = t->tm_isdst > 0  ? QDateTimePrivate::LocalDST :
+                 t->tm_isdst == 0 ? QDateTimePrivate::LocalStandard :
+                 QDateTimePrivate::LocalUnknown;
+    return dt;
+}
+
+QDateTime QDateTime::currentDateTimeUtc()
+{
+    // posix compliant system
+    // we have milliseconds
+    struct timeval tv;
+    gettimeofday(&tv, 0);
+    time_t ltime = tv.tv_sec;
+    struct tm *t = 0;
+
+#if !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS)
+    // use the reentrant version of localtime() where available
+    struct tm res;
+    t = gmtime_r(&ltime, &res);
+#else
+    t = gmtime(&ltime);
+#endif
+
+    QDateTime dt;
+    dt.d->time.mds = msecsFromDecomposed(t->tm_hour, t->tm_min, t->tm_sec, tv.tv_usec / 1000);
+
+    dt.d->date.jd = julianDayFromDate(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday);
+    dt.d->spec = QDateTimePrivate::UTC;
+    return dt;
+}
+
+qint64 QDateTime::currentMSecsSinceEpoch()
+{
+    // posix compliant system
+    // we have milliseconds
+    struct timeval tv;
+    gettimeofday(&tv, 0);
+    return qint64(tv.tv_sec) * Q_INT64_C(1000) + tv.tv_usec / 1000;
+}
+
+#else
+#error "What system is this?"
+#endif
+
+/*!
+  \since 4.2
+
+  Returns a datetime whose date and time are the number of \a seconds
+  that have passed since 1970-01-01T00:00:00, Coordinated Universal
+  Time (Qt::UTC). On systems that do not support time zones, the time
+  will be set as if local time were Qt::UTC.
+
+  \sa toTime_t(), setTime_t()
+*/
+QDateTime QDateTime::fromTime_t(uint seconds)
+{
+    QDateTime d;
+    d.setTime_t(seconds);
+    return d;
+}
+
+/*!
+  \since 4.7
+
+  Returns a datetime whose date and time are the number of milliseconds, \a msecs,
+  that have passed since 1970-01-01T00:00:00.000, Coordinated Universal
+  Time (Qt::UTC). On systems that do not support time zones, the time
+  will be set as if local time were Qt::UTC.
+
+  Note that there are possible values for \a msecs that lie outside the valid
+  range of QDateTime, both negative and positive. The behavior of this
+  function is undefined for those values.
+
+  \sa toTime_t(), setTime_t()
+*/
+QDateTime QDateTime::fromMSecsSinceEpoch(qint64 msecs)
+{
+    QDateTime d;
+    d.setMSecsSinceEpoch(msecs);
+    return d;
+}
+
+/*!
+ \since 4.4
+ \internal
+
+ Sets the offset from UTC to \a seconds, and also sets timeSpec() to
+ Qt::OffsetFromUTC.
+
+ The maximum and minimum offset is 14 positive or negative hours.  If
+ \a seconds is larger or smaller than that, the result is undefined.
+
+ 0 as offset is identical to UTC. Therefore, if \a seconds is 0, the
+ timeSpec() will be set to Qt::UTC. Hence the UTC offset always
+ relates to UTC, and can never relate to local time.
+
+ \sa isValid(), utcOffset()
+ */
+void QDateTime::setUtcOffset(int seconds)
+{
+    detach();
+
+    /* The motivation to also setting d->spec is to ensure that the QDateTime
+     * instance stay in well-defined states all the time, instead of that
+     * we instruct the user to ensure it. */
+    if(seconds == 0)
+        d->spec = QDateTimePrivate::UTC;
+    else
+        d->spec = QDateTimePrivate::OffsetFromUTC;
+
+    /* Even if seconds is 0 we assign it to utcOffset. */
+    d->utcOffset = seconds;
+}
+
+/*!
+ \since 4.4
+ \internal
+
+ Returns the UTC offset in seconds. If the timeSpec() isn't
+ Qt::OffsetFromUTC, 0 is returned. However, since 0 is a valid UTC
+ offset the return value of this function cannot be used to determine
+ whether a utcOffset() is used or is valid, timeSpec() must be
+ checked.
+
+ Likewise, if this QDateTime() is invalid or if timeSpec() isn't
+ Qt::OffsetFromUTC, 0 is returned.
+
+ The UTC offset only applies if the timeSpec() is Qt::OffsetFromUTC.
+
+ \sa isValid(), setUtcOffset()
+ */
+int QDateTime::utcOffset() const
+{
+    if(isValid() && d->spec == QDateTimePrivate::OffsetFromUTC)
+        return d->utcOffset;
+    else
+        return 0;
+}
+
+#ifndef QT_NO_DATESTRING
+
+static int fromShortMonthName(const QString &monthName)
+{
+    // Assume that English monthnames are the default
+    for (int i = 0; i < 12; ++i) {
+        if (monthName == QLatin1String(qt_shortMonthNames[i]))
+            return i + 1;
+    }
+    // If English names can't be found, search the localized ones
+    for (int i = 1; i <= 12; ++i) {
+        if (monthName == QDate::shortMonthName(i))
+            return i;
+    }
+    return -1;
+}
+
+/*!
+    \fn QDateTime QDateTime::fromString(const QString &string, Qt::DateFormat format)
+
+    Returns the QDateTime represented by the \a string, using the
+    \a format given, or an invalid datetime if this is not possible.
+
+    Note for Qt::TextDate: It is recommended that you use the
+    English short month names (e.g. "Jan"). Although localized month
+    names can also be used, they depend on the user's locale settings.
+*/
+QDateTime QDateTime::fromString(const QString& s, Qt::DateFormat f)
+{
+    if (s.isEmpty()) {
+        return QDateTime();
+    }
+
+    switch (f) {
+    case Qt::ISODate: {
+        QString tmp = s;
+        Qt::TimeSpec ts = Qt::LocalTime;
+        const QDate date = QDate::fromString(tmp.left(10), Qt::ISODate);
+        if (tmp.size() == 10)
+            return QDateTime(date);
+
+        tmp = tmp.mid(11);
+
+        // Recognize UTC specifications
+        if (tmp.endsWith(QLatin1Char('Z'))) {
+            ts = Qt::UTC;
+            tmp.chop(1);
+        }
+
+        // Recognize timezone specifications
+        QRegExp rx(QLatin1String("[+-]"));
+        if (tmp.contains(rx)) {
+            int idx = tmp.indexOf(rx);
+            QString tmp2 = tmp.mid(idx);
+            tmp = tmp.left(idx);
+            bool ok = true;
+            int ntzhour = 1;
+            int ntzminute = 3;
+            if ( tmp2.indexOf(QLatin1Char(':')) == 3 )
+               ntzminute = 4;
+            const int tzhour(tmp2.mid(ntzhour, 2).toInt(&ok));
+            const int tzminute(tmp2.mid(ntzminute, 2).toInt(&ok));
+            QTime tzt(tzhour, tzminute);
+            int utcOffset = (tzt.hour() * 60 + tzt.minute()) * 60;
+            if ( utcOffset != 0 ) {
+                ts = Qt::OffsetFromUTC;
+                QDateTime dt(date, QTime::fromString(tmp, Qt::ISODate), ts);
+                dt.setUtcOffset( utcOffset * (tmp2.startsWith(QLatin1Char('-')) ? -1 : 1) );
+                return dt;
+            }
+        }
+        return QDateTime(date, QTime::fromString(tmp, Qt::ISODate), ts);
+    }
+    case Qt::SystemLocaleDate:
+    case Qt::SystemLocaleShortDate:
+    case Qt::SystemLocaleLongDate:
+        return fromString(s, QLocale::system().dateTimeFormat(f == Qt::SystemLocaleLongDate ? QLocale::LongFormat
+                                                                                            : QLocale::ShortFormat));
+    case Qt::LocaleDate:
+    case Qt::DefaultLocaleShortDate:
+    case Qt::DefaultLocaleLongDate:
+        return fromString(s, QLocale().dateTimeFormat(f == Qt::DefaultLocaleLongDate ? QLocale::LongFormat
+                                                                                     : QLocale::ShortFormat));
+#if !defined(QT_NO_TEXTDATE)
+    case Qt::TextDate: {
+        QStringList parts = s.split(QLatin1Char(' '), QString::SkipEmptyParts);
+
+        if ((parts.count() < 5) || (parts.count() > 6)) {
+            return QDateTime();
+        }
+
+        // Accept "Sun Dec 1 13:02:00 1974" and "Sun 1. Dec 13:02:00 1974"
+        int month = -1, day = -1;
+        bool ok;
+
+        month = fromShortMonthName(parts.at(1));
+        if (month != -1) {
+            day = parts.at(2).toInt(&ok);
+            if (!ok)
+                day = -1;
+        }
+
+        if (month == -1 || day == -1) {
+            // first variant failed, lets try the other
+            month = fromShortMonthName(parts.at(2));
+            if (month != -1) {
+                QString dayStr = parts.at(1);
+                if (dayStr.endsWith(QLatin1Char('.'))) {
+                    dayStr.chop(1);
+                    day = dayStr.toInt(&ok);
+                    if (!ok)
+                        day = -1;
+                } else {
+                    day = -1;
+                }
+            }
+        }
+
+        if (month == -1 || day == -1) {
+            // both variants failed, give up
+            return QDateTime();
+        }
+
+        int year;
+        QStringList timeParts = parts.at(3).split(QLatin1Char(':'));
+        if ((timeParts.count() == 3) || (timeParts.count() == 2)) {
+            year = parts.at(4).toInt(&ok);
+            if (!ok)
+                return QDateTime();
+        } else {
+            timeParts = parts.at(4).split(QLatin1Char(':'));
+            if ((timeParts.count() != 3) && (timeParts.count() != 2))
+                return QDateTime();
+            year = parts.at(3).toInt(&ok);
+            if (!ok)
+                return QDateTime();
+        }
+
+        int hour = timeParts.at(0).toInt(&ok);
+        if (!ok) {
+            return QDateTime();
+        }
+
+        int minute = timeParts.at(1).toInt(&ok);
+        if (!ok) {
+            return QDateTime();
+        }
+
+        int second = (timeParts.count() > 2) ? timeParts.at(2).toInt(&ok) : 0;
+        if (!ok) {
+            return QDateTime();
+        }
+
+        QDate date(year, month, day);
+        QTime time(hour, minute, second);
+
+        if (parts.count() == 5)
+            return QDateTime(date, time, Qt::LocalTime);
+
+        QString tz = parts.at(5);
+        if (!tz.startsWith(QLatin1String("GMT"), Qt::CaseInsensitive))
+            return QDateTime();
+        QDateTime dt(date, time, Qt::UTC);
+        if (tz.length() > 3) {
+            int tzoffset = 0;
+            QChar sign = tz.at(3);
+            if ((sign != QLatin1Char('+'))
+                && (sign != QLatin1Char('-'))) {
+                return QDateTime();
+            }
+            int tzhour = tz.mid(4, 2).toInt(&ok);
+            if (!ok)
+                return QDateTime();
+            int tzminute = tz.mid(6).toInt(&ok);
+            if (!ok)
+                return QDateTime();
+            tzoffset = (tzhour*60 + tzminute) * 60;
+            if (sign == QLatin1Char('-'))
+                tzoffset = -tzoffset;
+            dt.setUtcOffset(tzoffset);
+        }
+        return dt.toLocalTime();
+    }
+#endif //QT_NO_TEXTDATE
+    }
+
+    return QDateTime();
+}
+
+/*!
+    \fn QDateTime::fromString(const QString &string, const QString &format)
+
+    Returns the QDateTime represented by the \a string, using the \a
+    format given, or an invalid datetime if the string cannot be parsed.
+
+    These expressions may be used for the date part of the format string:
+
+    \table
+    \header \i Expression \i Output
+    \row \i d \i the day as number without a leading zero (1 to 31)
+    \row \i dd \i the day as number with a leading zero (01 to 31)
+    \row \i ddd
+            \i the abbreviated localized day name (e.g. 'Mon' to 'Sun').
+            Uses QDate::shortDayName().
+    \row \i dddd
+            \i the long localized day name (e.g. 'Monday' to 'Sunday').
+            Uses QDate::longDayName().
+    \row \i M \i the month as number without a leading zero (1-12)
+    \row \i MM \i the month as number with a leading zero (01-12)
+    \row \i MMM
+            \i the abbreviated localized month name (e.g. 'Jan' to 'Dec').
+            Uses QDate::shortMonthName().
+    \row \i MMMM
+            \i the long localized month name (e.g. 'January' to 'December').
+            Uses QDate::longMonthName().
+    \row \i yy \i the year as two digit number (00-99)
+    \row \i yyyy \i the year as four digit number
+    \endtable
+
+    \note Unlike the other version of this function, day and month names must
+    be given in the user's local language. It is only possible to use the English
+    names if the user's language is English.
+
+    These expressions may be used for the time part of the format string:
+
+    \table
+    \header \i Expression \i Output
+    \row \i h
+            \i the hour without a leading zero (0 to 23 or 1 to 12 if AM/PM display)
+    \row \i hh
+            \i the hour with a leading zero (00 to 23 or 01 to 12 if AM/PM display)
+    \row \i H
+            \i the hour without a leading zero (0 to 23, even with AM/PM display)
+    \row \i HH
+            \i the hour with a leading zero (00 to 23, even with AM/PM display)
+    \row \i m \i the minute without a leading zero (0 to 59)
+    \row \i mm \i the minute with a leading zero (00 to 59)
+    \row \i s \i the second without a leading zero (0 to 59)
+    \row \i ss \i the second with a leading zero (00 to 59)
+    \row \i z \i the milliseconds without leading zeroes (0 to 999)
+    \row \i zzz \i the milliseconds with leading zeroes (000 to 999)
+    \row \i AP or A
+         \i interpret as an AM/PM time. \e AP must be either "AM" or "PM".
+    \row \i ap or a
+         \i Interpret as an AM/PM time. \e ap must be either "am" or "pm".
+    \endtable
+
+    All other input characters will be treated as text. Any sequence
+    of characters that are enclosed in singlequotes will also be
+    treated as text and not be used as an expression.
+
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 12
+
+    If the format is not satisfied an invalid QDateTime is returned.
+    The expressions that don't have leading zeroes (d, M, h, m, s, z) will be
+    greedy. This means that they will use two digits even if this will
+    put them outside the range and/or leave too few digits for other
+    sections.
+
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 13
+
+    This could have meant 1 January 00:30.00 but the M will grab
+    two digits.
+
+    For any field that is not represented in the format the following
+    defaults are used:
+
+    \table
+    \header \i Field  \i Default value
+    \row    \i Year   \i 1900
+    \row    \i Month  \i 1 (January)
+    \row    \i Day    \i 1
+    \row    \i Hour   \i 0
+    \row    \i Minute \i 0
+    \row    \i Second \i 0
+    \endtable
+
+    For example:
+
+    \snippet doc/src/snippets/code/src_corelib_tools_qdatetime.cpp 14
+
+    \sa QDate::fromString() QTime::fromString() QDate::toString()
+    QDateTime::toString() QTime::toString()
+*/
+
+QDateTime QDateTime::fromString(const QString &string, const QString &format)
+{
+#ifndef QT_BOOTSTRAPPED
+    QTime time;
+    QDate date;
+
+    QDateTimeParser dt(QVariant::DateTime, QDateTimeParser::FromString);
+    if (dt.parseFormat(format) && dt.fromString(string, &date, &time))
+        return QDateTime(date, time);
+#else
+    Q_UNUSED(string);
+    Q_UNUSED(format);
+#endif
+    return QDateTime(QDate(), QTime(-1, -1, -1));
+}
+
+#endif // QT_NO_DATESTRING
+/*!
+    \fn QDateTime QDateTime::toLocalTime() const
+
+    Returns a datetime containing the date and time information in
+    this datetime, but specified using the Qt::LocalTime definition.
+
+    \sa toTimeSpec()
+*/
+
+/*!
+    \fn QDateTime QDateTime::toUTC() const
+
+    Returns a datetime containing the date and time information in
+    this datetime, but specified using the Qt::UTC definition.
+
+    \sa toTimeSpec()
+*/
+
+/*! \internal
+ */
+void QDateTime::detach()
+{
+    d.detach();
+}
+
+/*****************************************************************************
+  Date/time stream functions
+ *****************************************************************************/
+
+#ifndef QT_NO_DATASTREAM
+/*!
+    \relates QDate
+
+    Writes the \a date to stream \a out.
+
+    \sa {Serializing Qt Data Types}
+*/
+
+QDataStream &operator<<(QDataStream &out, const QDate &date)
+{
+    return out << (quint32)(date.jd);
+}
+
+/*!
+    \relates QDate
+
+    Reads a date from stream \a in into the \a date.
+
+    \sa {Serializing Qt Data Types}
+*/
+
+QDataStream &operator>>(QDataStream &in, QDate &date)
+{
+    quint32 jd;
+    in >> jd;
+    date.jd = jd;
+    return in;
+}
+
+/*!
+    \relates QTime
+
+    Writes \a time to stream \a out.
+
+    \sa {Serializing Qt Data Types}
+*/
+
+QDataStream &operator<<(QDataStream &out, const QTime &time)
+{
+    return out << quint32(time.mds);
+}
+
+/*!
+    \relates QTime
+
+    Reads a time from stream \a in into the given \a time.
+
+    \sa {Serializing Qt Data Types}
+*/
+
+QDataStream &operator>>(QDataStream &in, QTime &time)
+{
+    quint32 ds;
+    in >> ds;
+    time.mds = int(ds);
+    return in;
+}
+
+/*!
+    \relates QDateTime
+
+    Writes \a dateTime to the \a out stream.
+
+    \sa {Serializing Qt Data Types}
+*/
+QDataStream &operator<<(QDataStream &out, const QDateTime &dateTime)
+{
+    out << dateTime.d->date << dateTime.d->time;
+    if (out.version() >= 7)
+        out << (qint8)dateTime.d->spec;
+    return out;
+}
+
+/*!
+    \relates QDateTime
+
+    Reads a datetime from the stream \a in into \a dateTime.
+
+    \sa {Serializing Qt Data Types}
+*/
+
+QDataStream &operator>>(QDataStream &in, QDateTime &dateTime)
+{
+    dateTime.detach();
+
+    qint8 ts = (qint8)QDateTimePrivate::LocalUnknown;
+    in >> dateTime.d->date >> dateTime.d->time;
+    if (in.version() >= 7)
+        in >> ts;
+    dateTime.d->spec = (QDateTimePrivate::Spec)ts;
+    return in;
+}
+#endif // QT_NO_DATASTREAM
+
+
+/*!
+    \fn QString QDate::monthName(int month)
+
+    Use shortMonthName() instead.
+*/
+
+/*!
+    \fn QString QDate::dayName(int weekday)
+
+    Use shortDayName() instead.
+*/
+
+/*!
+    \fn bool QDate::leapYear(int year)
+
+    Use isLeapYear() instead.
+*/
+
+/*!
+    \fn QDate QDate::currentDate(Qt::TimeSpec spec)
+
+    If \a spec is Qt::LocalTime, use the currentDate() overload that
+    takes no parameters instead; otherwise, use
+    QDateTime::currentDateTime().
+
+    \oldcode
+        QDate localDate = QDate::currentDate(Qt::LocalTime);
+        QDate utcDate = QDate::currentDate(Qt::UTC);
+    \newcode
+        QDate localDate = QDate::currentDate();
+        QDate utcDate = QDateTime::currentDateTime().toUTC().date();
+    \endcode
+
+    \sa QDateTime::toUTC()
+*/
+
+/*!
+    \fn QTime QTime::currentTime(Qt::TimeSpec specification)
+
+    Returns the current time for the given \a specification.
+
+    To replace uses of this function where the \a specification is Qt::LocalTime,
+    use the currentDate() overload that takes no parameters instead; otherwise,
+    use QDateTime::currentDateTime() and convert the result to a UTC measurement.
+
+    \oldcode
+        QTime localTime = QTime::currentTime(Qt::LocalTime);
+        QTime utcTime = QTime::currentTime(Qt::UTC);
+    \newcode
+        QTime localTime = QTime::currentTime();
+        QTime utcTime = QTimeTime::currentDateTime().toUTC().time();
+    \endcode
+
+    \sa QDateTime::toUTC()
+*/
+
+/*!
+    \fn void QDateTime::setTime_t(uint secsSince1Jan1970UTC, Qt::TimeSpec spec)
+
+    Use the single-argument overload of setTime_t() instead.
+*/
+
+/*!
+    \fn QDateTime QDateTime::currentDateTime(Qt::TimeSpec spec)
+
+    Use the currentDateTime() overload that takes no parameters
+    instead.
+*/
+
+// checks if there is an unqoted 'AP' or 'ap' in the string
+static bool hasUnquotedAP(const QString &f)
+{
+    const QLatin1Char quote('\'');
+    bool inquote = false;
+    const int max = f.size();
+    for (int i=0; i<max; ++i) {
+        if (f.at(i) == quote) {
+            inquote = !inquote;
+        } else if (!inquote && f.at(i).toUpper() == QLatin1Char('A')) {
+            return true;
+        }
+    }
+    return false;
+}
+
+#ifndef QT_NO_DATESTRING
+/*****************************************************************************
+  Some static function used by QDate, QTime and QDateTime
+*****************************************************************************/
+
+// Replaces tokens by their value. See QDateTime::toString() for a list of valid tokens
+static QString getFmtString(const QString& f, const QTime* dt = 0, const QDate* dd = 0, bool am_pm = false)
+{
+    if (f.isEmpty())
+        return QString();
+
+    QString buf = f;
+    int removed = 0;
+
+    if (dt) {
+        if (f.startsWith(QLatin1String("hh")) || f.startsWith(QLatin1String("HH"))) {
+            const bool hour12 = f.at(0) == QLatin1Char('h') && am_pm;
+            if (hour12 && dt->hour() > 12)
+                buf = QString::number(dt->hour() - 12).rightJustified(2, QLatin1Char('0'), true);
+            else if (hour12 && dt->hour() == 0)
+                buf = QLatin1String("12");
+            else
+                buf = QString::number(dt->hour()).rightJustified(2, QLatin1Char('0'), true);
+            removed = 2;
+        } else if (f.at(0) == QLatin1Char('h') || f.at(0) == QLatin1Char('H')) {
+            const bool hour12 = f.at(0) == QLatin1Char('h') && am_pm;
+            if (hour12 && dt->hour() > 12)
+                buf = QString::number(dt->hour() - 12);
+            else if (hour12 && dt->hour() == 0)
+                buf = QLatin1String("12");
+            else
+                buf = QString::number(dt->hour());
+            removed = 1;
+        } else if (f.startsWith(QLatin1String("mm"))) {
+            buf = QString::number(dt->minute()).rightJustified(2, QLatin1Char('0'), true);
+            removed = 2;
+        } else if (f.at(0) == (QLatin1Char('m'))) {
+            buf = QString::number(dt->minute());
+            removed = 1;
+        } else if (f.startsWith(QLatin1String("ss"))) {
+            buf = QString::number(dt->second()).rightJustified(2, QLatin1Char('0'), true);
+            removed = 2;
+        } else if (f.at(0) == QLatin1Char('s')) {
+            buf = QString::number(dt->second());
+        } else if (f.startsWith(QLatin1String("zzz"))) {
+            buf = QString::number(dt->msec()).rightJustified(3, QLatin1Char('0'), true);
+            removed = 3;
+        } else if (f.at(0) == QLatin1Char('z')) {
+            buf = QString::number(dt->msec());
+            removed = 1;
+        } else if (f.at(0).toUpper() == QLatin1Char('A')) {
+            const bool upper = f.at(0) == QLatin1Char('A');
+            buf = dt->hour() < 12 ? QLatin1String("am") : QLatin1String("pm");
+            if (upper)
+                buf = buf.toUpper();
+            if (f.size() > 1 && f.at(1).toUpper() == QLatin1Char('P') &&
+                f.at(0).isUpper() == f.at(1).isUpper()) {
+                removed = 2;
+            } else {
+                removed = 1;
+            }
+        }
+    }
+
+    if (dd) {
+        if (f.startsWith(QLatin1String("dddd"))) {
+            buf = dd->longDayName(dd->dayOfWeek());
+            removed = 4;
+        } else if (f.startsWith(QLatin1String("ddd"))) {
+            buf = dd->shortDayName(dd->dayOfWeek());
+            removed = 3;
+        } else if (f.startsWith(QLatin1String("dd"))) {
+            buf = QString::number(dd->day()).rightJustified(2, QLatin1Char('0'), true);
+            removed = 2;
+        } else if (f.at(0) == QLatin1Char('d')) {
+            buf = QString::number(dd->day());
+            removed = 1;
+        } else if (f.startsWith(QLatin1String("MMMM"))) {
+            buf = dd->longMonthName(dd->month());
+            removed = 4;
+        } else if (f.startsWith(QLatin1String("MMM"))) {
+            buf = dd->shortMonthName(dd->month());
+            removed = 3;
+        } else if (f.startsWith(QLatin1String("MM"))) {
+            buf = QString::number(dd->month()).rightJustified(2, QLatin1Char('0'), true);
+            removed = 2;
+        } else if (f.at(0) == QLatin1Char('M')) {
+            buf = QString::number(dd->month());
+            removed = 1;
+        } else if (f.startsWith(QLatin1String("yyyy"))) {
+            const int year = dd->year();
+            buf = QString::number(qAbs(year)).rightJustified(4, QLatin1Char('0'));
+            if(year > 0)
+                removed = 4;
+            else
+            {
+                buf.prepend(QLatin1Char('-'));
+                removed = 5;
+            }
+
+        } else if (f.startsWith(QLatin1String("yy"))) {
+            buf = QString::number(dd->year()).right(2).rightJustified(2, QLatin1Char('0'));
+            removed = 2;
+        }
+    }
+    if (removed == 0 || removed >= f.size()) {
+        return buf;
+    }
+
+    return buf + getFmtString(f.mid(removed), dt, dd, am_pm);
+}
+
+// Parses the format string and uses getFmtString to get the values for the tokens. Ret
+static QString fmtDateTime(const QString& f, const QTime* dt, const QDate* dd)
+{
+    const QLatin1Char quote('\'');
+    if (f.isEmpty())
+        return QString();
+    if (dt && !dt->isValid())
+        return QString();
+    if (dd && !dd->isValid())
+        return QString();
+
+    const bool ap = hasUnquotedAP(f);
+
+    QString buf;
+    QString frm;
+    QChar status(QLatin1Char('0'));
+
+    for (int i = 0; i < (int)f.length(); ++i) {
+        if (f.at(i) == quote) {
+            if (status == quote) {
+                if (i > 0 && f.at(i - 1) == quote)
+                    buf += QLatin1Char('\'');
+                status = QLatin1Char('0');
+            } else {
+                if (!frm.isEmpty()) {
+                    buf += getFmtString(frm, dt, dd, ap);
+                    frm.clear();
+                }
+                status = quote;
+            }
+        } else if (status == quote) {
+            buf += f.at(i);
+        } else if (f.at(i) == status) {
+            if ((ap) && ((f.at(i) == QLatin1Char('P')) || (f.at(i) == QLatin1Char('p'))))
+                status = QLatin1Char('0');
+            frm += f.at(i);
+        } else {
+            buf += getFmtString(frm, dt, dd, ap);
+            frm.clear();
+            if ((f.at(i) == QLatin1Char('h')) || (f.at(i) == QLatin1Char('m'))
+                || (f.at(i) == QLatin1Char('H'))
+                || (f.at(i) == QLatin1Char('s')) || (f.at(i) == QLatin1Char('z'))) {
+                status = f.at(i);
+                frm += f.at(i);
+            } else if ((f.at(i) == QLatin1Char('d')) || (f.at(i) == QLatin1Char('M')) || (f.at(i) == QLatin1Char('y'))) {
+                status = f.at(i);
+                frm += f.at(i);
+            } else if ((ap) && (f.at(i) == QLatin1Char('A'))) {
+                status = QLatin1Char('P');
+                frm += f.at(i);
+            } else  if((ap) && (f.at(i) == QLatin1Char('a'))) {
+                status = QLatin1Char('p');
+                frm += f.at(i);
+            } else {
+                buf += f.at(i);
+                status = QLatin1Char('0');
+            }
+        }
+    }
+
+    buf += getFmtString(frm, dt, dd, ap);
+
+    return buf;
+}
+#endif // QT_NO_DATESTRING
+
+#ifdef Q_OS_WIN
+static const int LowerYear = 1980;
+#else
+static const int LowerYear = 1970;
+#endif
+static const int UpperYear = 2037;
+
+static QDate adjustDate(QDate date)
+{
+    QDate lowerLimit(LowerYear, 1, 2);
+    QDate upperLimit(UpperYear, 12, 30);
+
+    if (date > lowerLimit && date < upperLimit)
+        return date;
+
+    int month = date.month();
+    int day = date.day();
+
+    // neither 1970 nor 2037 are leap years, so make sure date isn't Feb 29
+    if (month == 2 && day == 29)
+        --day;
+
+    if (date < lowerLimit)
+        date.setDate(LowerYear, month, day);
+    else
+        date.setDate(UpperYear, month, day);
+
+    return date;
+}
+
+static QDateTimePrivate::Spec utcToLocal(QDate &date, QTime &time)
+{
+    QDate fakeDate = adjustDate(date);
+
+    // won't overflow because of fakeDate
+    time_t secsSince1Jan1970UTC = toMSecsSinceEpoch_helper(fakeDate.toJulianDay(), QTime().msecsTo(time)) / 1000;
+    tm *brokenDown = 0;
+
+#if defined(Q_OS_WINCE)
+    tm res;
+    FILETIME utcTime = time_tToFt(secsSince1Jan1970UTC);
+    FILETIME resultTime;
+    FileTimeToLocalFileTime(&utcTime , &resultTime);
+    SYSTEMTIME sysTime;
+    FileTimeToSystemTime(&resultTime , &sysTime);
+
+    res.tm_sec = sysTime.wSecond;
+    res.tm_min = sysTime.wMinute;
+    res.tm_hour = sysTime.wHour;
+    res.tm_mday = sysTime.wDay;
+    res.tm_mon = sysTime.wMonth - 1;
+    res.tm_year = sysTime.wYear - 1900;
+    brokenDown = &res;
+#elif defined(Q_OS_SYMBIAN)
+    // months and days are zero index based
+    _LIT(KUnixEpoch, "19700000:000000.000000");
+    TTimeIntervalSeconds utcOffset = User::UTCOffset();
+    TTimeIntervalSeconds tTimeIntervalSecsSince1Jan1970UTC(secsSince1Jan1970UTC);
+    TTime epochTTime;
+    TInt err = epochTTime.Set(KUnixEpoch);
+    tm res;
+    if(err == KErrNone) {
+        TTime utcTTime = epochTTime + tTimeIntervalSecsSince1Jan1970UTC;
+        utcTTime = utcTTime + utcOffset;
+        TDateTime utcDateTime = utcTTime.DateTime();
+        res.tm_sec = utcDateTime.Second();
+        res.tm_min = utcDateTime.Minute();
+        res.tm_hour = utcDateTime.Hour();
+        res.tm_mday = utcDateTime.Day() + 1; // non-zero based index for tm struct
+        res.tm_mon = utcDateTime.Month();
+        res.tm_year = utcDateTime.Year() - 1900;
+        res.tm_isdst = 0;
+        brokenDown = &res;
+    }
+#elif !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS)
+    // use the reentrant version of localtime() where available
+    tzset();
+    tm res;
+    brokenDown = localtime_r(&secsSince1Jan1970UTC, &res);
+#elif defined(_MSC_VER) && _MSC_VER >= 1400
+    tm res;
+    if (!_localtime64_s(&res, &secsSince1Jan1970UTC))
+        brokenDown = &res;
+#else
+    brokenDown = localtime(&secsSince1Jan1970UTC);
+#endif
+    if (!brokenDown) {
+        date = QDate(1970, 1, 1);
+        time = QTime();
+        return QDateTimePrivate::LocalUnknown;
+    } else {
+        int deltaDays = fakeDate.daysTo(date);
+        date = QDate(brokenDown->tm_year + 1900, brokenDown->tm_mon + 1, brokenDown->tm_mday);
+        time = QTime(brokenDown->tm_hour, brokenDown->tm_min, brokenDown->tm_sec, time.msec());
+        date = date.addDays(deltaDays);
+        if (brokenDown->tm_isdst > 0)
+            return QDateTimePrivate::LocalDST;
+        else if (brokenDown->tm_isdst < 0)
+            return QDateTimePrivate::LocalUnknown;
+        else
+            return QDateTimePrivate::LocalStandard;
+    }
+}
+
+static void localToUtc(QDate &date, QTime &time, int isdst)
+{
+    if (!date.isValid())
+        return;
+
+    QDate fakeDate = adjustDate(date);
+
+    tm localTM;
+    localTM.tm_sec = time.second();
+    localTM.tm_min = time.minute();
+    localTM.tm_hour = time.hour();
+    localTM.tm_mday = fakeDate.day();
+    localTM.tm_mon = fakeDate.month() - 1;
+    localTM.tm_year = fakeDate.year() - 1900;
+    localTM.tm_isdst = (int)isdst;
+#if defined(Q_OS_WINCE) || defined(Q_OS_SYMBIAN)
+    time_t secsSince1Jan1970UTC = (toMSecsSinceEpoch_helper(fakeDate.toJulianDay(), QTime().msecsTo(time)) / 1000);
+#else
+#if defined(Q_OS_WIN)
+    _tzset();
+#endif
+    time_t secsSince1Jan1970UTC = mktime(&localTM);
+#endif
+    tm *brokenDown = 0;
+#if defined(Q_OS_WINCE)
+    tm res;
+    FILETIME localTime = time_tToFt(secsSince1Jan1970UTC);
+    SYSTEMTIME sysTime;
+    FileTimeToSystemTime(&localTime, &sysTime);
+    FILETIME resultTime;
+    LocalFileTimeToFileTime(&localTime , &resultTime);
+    FileTimeToSystemTime(&resultTime , &sysTime);
+    res.tm_sec = sysTime.wSecond;
+    res.tm_min = sysTime.wMinute;
+    res.tm_hour = sysTime.wHour;
+    res.tm_mday = sysTime.wDay;
+    res.tm_mon = sysTime.wMonth - 1;
+    res.tm_year = sysTime.wYear - 1900;
+    res.tm_isdst = (int)isdst;
+    brokenDown = &res;
+#elif defined(Q_OS_SYMBIAN)
+    // months and days are zero index based
+    _LIT(KUnixEpoch, "19700000:000000.000000");
+    TTimeIntervalSeconds utcOffset = TTimeIntervalSeconds(0 - User::UTCOffset().Int());
+    TTimeIntervalSeconds tTimeIntervalSecsSince1Jan1970UTC(secsSince1Jan1970UTC);
+    TTime epochTTime;
+    TInt err = epochTTime.Set(KUnixEpoch);
+    tm res;
+    if(err == KErrNone) {
+        TTime utcTTime = epochTTime + tTimeIntervalSecsSince1Jan1970UTC;
+        utcTTime = utcTTime + utcOffset;
+        TDateTime utcDateTime = utcTTime.DateTime();
+        res.tm_sec = utcDateTime.Second();
+        res.tm_min = utcDateTime.Minute();
+        res.tm_hour = utcDateTime.Hour();
+        res.tm_mday = utcDateTime.Day() + 1; // non-zero based index for tm struct
+        res.tm_mon = utcDateTime.Month();
+        res.tm_year = utcDateTime.Year() - 1900;
+        res.tm_isdst = (int)isdst;
+        brokenDown = &res;
+    }
+#elif !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS)
+    // use the reentrant version of gmtime() where available
+    tm res;
+    brokenDown = gmtime_r(&secsSince1Jan1970UTC, &res);
+#elif defined(_MSC_VER) && _MSC_VER >= 1400
+    tm res;
+    if (!_gmtime64_s(&res, &secsSince1Jan1970UTC))
+        brokenDown = &res;
+#else
+    brokenDown = gmtime(&secsSince1Jan1970UTC);
+#endif // !QT_NO_THREAD && _POSIX_THREAD_SAFE_FUNCTIONS
+    if (!brokenDown) {
+        date = QDate(1970, 1, 1);
+        time = QTime();
+    } else {
+        int deltaDays = fakeDate.daysTo(date);
+        date = QDate(brokenDown->tm_year + 1900, brokenDown->tm_mon + 1, brokenDown->tm_mday);
+        time = QTime(brokenDown->tm_hour, brokenDown->tm_min, brokenDown->tm_sec, time.msec());
+        date = date.addDays(deltaDays);
+    }
+}
+
+QDateTimePrivate::Spec QDateTimePrivate::getLocal(QDate &outDate, QTime &outTime) const
+{
+    outDate = date;
+    outTime = time;
+    if (spec == QDateTimePrivate::UTC)
+        return utcToLocal(outDate, outTime);
+    return spec;
+}
+
+void QDateTimePrivate::getUTC(QDate &outDate, QTime &outTime) const
+{
+    outDate = date;
+    outTime = time;
+    const bool isOffset = spec == QDateTimePrivate::OffsetFromUTC;
+
+    if (spec != QDateTimePrivate::UTC && !isOffset)
+        localToUtc(outDate, outTime, (int)spec);
+
+    if (isOffset)
+        addMSecs(outDate, outTime, -(qint64(utcOffset) * 1000));
+}
+
+#if !defined(QT_NO_DEBUG_STREAM) && !defined(QT_NO_DATESTRING)
+QDebug operator<<(QDebug dbg, const QDate &date)
+{
+    dbg.nospace() << "QDate(" << date.toString() << ')';
+    return dbg.space();
+}
+
+QDebug operator<<(QDebug dbg, const QTime &time)
+{
+    dbg.nospace() << "QTime(" << time.toString() << ')';
+    return dbg.space();
+}
+
+QDebug operator<<(QDebug dbg, const QDateTime &date)
+{
+    dbg.nospace() << "QDateTime(" << date.toString() << ')';
+    return dbg.space();
+}
+#endif
+
+#ifndef QT_BOOTSTRAPPED
+
+/*!
+  \internal
+  Gets the digit from a datetime. E.g.
+
+  QDateTime var(QDate(2004, 02, 02));
+  int digit = getDigit(var, Year);
+  // digit = 2004
+*/
+
+int QDateTimeParser::getDigit(const QDateTime &t, int index) const
+{
+    if (index < 0 || index >= sectionNodes.size()) {
+#ifndef QT_NO_DATESTRING
+        qWarning("QDateTimeParser::getDigit() Internal error (%s %d)",
+                 qPrintable(t.toString()), index);
+#else
+        qWarning("QDateTimeParser::getDigit() Internal error (%d)", index);
+#endif
+        return -1;
+    }
+    const SectionNode &node = sectionNodes.at(index);
+    switch (node.type) {
+    case Hour24Section: case Hour12Section: return t.time().hour();
+    case MinuteSection: return t.time().minute();
+    case SecondSection: return t.time().second();
+    case MSecSection: return t.time().msec();
+    case YearSection2Digits:
+    case YearSection: return t.date().year();
+    case MonthSection: return t.date().month();
+    case DaySection: return t.date().day();
+    case DayOfWeekSection: return t.date().day();
+    case AmPmSection: return t.time().hour() > 11 ? 1 : 0;
+
+    default: break;
+    }
+
+#ifndef QT_NO_DATESTRING
+    qWarning("QDateTimeParser::getDigit() Internal error 2 (%s %d)",
+             qPrintable(t.toString()), index);
+#else
+    qWarning("QDateTimeParser::getDigit() Internal error 2 (%d)", index);
+#endif
+    return -1;
+}
+
+/*!
+  \internal
+  Sets a digit in a datetime. E.g.
+
+  QDateTime var(QDate(2004, 02, 02));
+  int digit = getDigit(var, Year);
+  // digit = 2004
+  setDigit(&var, Year, 2005);
+  digit = getDigit(var, Year);
+  // digit = 2005
+*/
+
+bool QDateTimeParser::setDigit(QDateTime &v, int index, int newVal) const
+{
+    if (index < 0 || index >= sectionNodes.size()) {
+#ifndef QT_NO_DATESTRING
+        qWarning("QDateTimeParser::setDigit() Internal error (%s %d %d)",
+                 qPrintable(v.toString()), index, newVal);
+#else
+        qWarning("QDateTimeParser::setDigit() Internal error (%d %d)", index, newVal);
+#endif
+        return false;
+    }
+    const SectionNode &node = sectionNodes.at(index);
+
+    int year, month, day, hour, minute, second, msec;
+    year = v.date().year();
+    month = v.date().month();
+    day = v.date().day();
+    hour = v.time().hour();
+    minute = v.time().minute();
+    second = v.time().second();
+    msec = v.time().msec();
+
+    switch (node.type) {
+    case Hour24Section: case Hour12Section: hour = newVal; break;
+    case MinuteSection: minute = newVal; break;
+    case SecondSection: second = newVal; break;
+    case MSecSection: msec = newVal; break;
+    case YearSection2Digits:
+    case YearSection: year = newVal; break;
+    case MonthSection: month = newVal; break;
+    case DaySection:
+    case DayOfWeekSection:
+        if (newVal > 31) {
+            // have to keep legacy behavior. setting the
+            // date to 32 should return false. Setting it
+            // to 31 for february should return true
+            return false;
+        }
+        day = newVal;
+        break;
+    case AmPmSection: hour = (newVal == 0 ? hour % 12 : (hour % 12) + 12); break;
+    default:
+        qWarning("QDateTimeParser::setDigit() Internal error (%s)",
+                 qPrintable(sectionName(node.type)));
+        break;
+    }
+
+    if (!(node.type & (DaySection|DayOfWeekSection))) {
+        if (day < cachedDay)
+            day = cachedDay;
+        const int max = QDate(year, month, 1).daysInMonth();
+        if (day > max) {
+            day = max;
+        }
+    }
+    if (QDate::isValid(year, month, day) && QTime::isValid(hour, minute, second, msec)) {
+        v = QDateTime(QDate(year, month, day), QTime(hour, minute, second, msec), spec);
+        return true;
+    }
+    return false;
+}
+
+
+
+/*!
+  \
+
+  Returns the absolute maximum for a section
+*/
+
+int QDateTimeParser::absoluteMax(int s, const QDateTime &cur) const
+{
+    const SectionNode &sn = sectionNode(s);
+    switch (sn.type) {
+    case Hour24Section:
+    case Hour12Section: return 23; // this is special-cased in
+                                   // parseSection. We want it to be
+                                   // 23 for the stepBy case.
+    case MinuteSection:
+    case SecondSection: return 59;
+    case MSecSection: return 999;
+    case YearSection2Digits:
+    case YearSection: return 9999; // sectionMaxSize will prevent
+                                   // people from typing in a larger
+                                   // number in count == 2 sections.
+                                   // stepBy() will work on real years anyway
+    case MonthSection: return 12;
+    case DaySection:
+    case DayOfWeekSection: return cur.isValid() ? cur.date().daysInMonth() : 31;
+    case AmPmSection: return 1;
+    default: break;
+    }
+    qWarning("QDateTimeParser::absoluteMax() Internal error (%s)",
+             qPrintable(sectionName(sn.type)));
+    return -1;
+}
+
+/*!
+  \internal
+
+  Returns the absolute minimum for a section
+*/
+
+int QDateTimeParser::absoluteMin(int s) const
+{
+    const SectionNode &sn = sectionNode(s);
+    switch (sn.type) {
+    case Hour24Section:
+    case Hour12Section:
+    case MinuteSection:
+    case SecondSection:
+    case MSecSection:
+    case YearSection2Digits:
+    case YearSection: return 0;
+    case MonthSection:
+    case DaySection:
+    case DayOfWeekSection: return 1;
+    case AmPmSection: return 0;
+    default: break;
+    }
+    qWarning("QDateTimeParser::absoluteMin() Internal error (%s, %0x)",
+             qPrintable(sectionName(sn.type)), sn.type);
+    return -1;
+}
+
+/*!
+  \internal
+
+  Returns the sectionNode for the Section \a s.
+*/
+
+const QDateTimeParser::SectionNode &QDateTimeParser::sectionNode(int sectionIndex) const
+{
+    if (sectionIndex < 0) {
+        switch (sectionIndex) {
+        case FirstSectionIndex:
+            return first;
+        case LastSectionIndex:
+            return last;
+        case NoSectionIndex:
+            return none;
+        }
+    } else if (sectionIndex < sectionNodes.size()) {
+        return sectionNodes.at(sectionIndex);
+    }
+
+    qWarning("QDateTimeParser::sectionNode() Internal error (%d)",
+             sectionIndex);
+    return none;
+}
+
+QDateTimeParser::Section QDateTimeParser::sectionType(int sectionIndex) const
+{
+    return sectionNode(sectionIndex).type;
+}
+
+
+/*!
+  \internal
+
+  Returns the starting position for section \a s.
+*/
+
+int QDateTimeParser::sectionPos(int sectionIndex) const
+{
+    return sectionPos(sectionNode(sectionIndex));
+}
+
+int QDateTimeParser::sectionPos(const SectionNode &sn) const
+{
+    switch (sn.type) {
+    case FirstSection: return 0;
+    case LastSection: return displayText().size() - 1;
+    default: break;
+    }
+    if (sn.pos == -1) {
+        qWarning("QDateTimeParser::sectionPos Internal error (%s)", qPrintable(sectionName(sn.type)));
+        return -1;
+    }
+    return sn.pos;
+}
+
+
+/*!
+  \internal helper function for parseFormat. removes quotes that are
+  not escaped and removes the escaping on those that are escaped
+
+*/
+
+static QString unquote(const QString &str)
+{
+    const QChar quote(QLatin1Char('\''));
+    const QChar slash(QLatin1Char('\\'));
+    const QChar zero(QLatin1Char('0'));
+    QString ret;
+    QChar status(zero);
+    const int max = str.size();
+    for (int i=0; i<max; ++i) {
+        if (str.at(i) == quote) {
+            if (status != quote) {
+                status = quote;
+            } else if (!ret.isEmpty() && str.at(i - 1) == slash) {
+                ret[ret.size() - 1] = quote;
+            } else {
+                status = zero;
+            }
+        } else {
+            ret += str.at(i);
+        }
+    }
+    return ret;
+}
+/*!
+  \internal
+
+  Parses the format \a newFormat. If successful, returns true and
+  sets up the format. Else keeps the old format and returns false.
+
+*/
+
+static inline int countRepeat(const QString &str, int index, int maxCount)
+{
+    int count = 1;
+    const QChar ch(str.at(index));
+    const int max = qMin(index + maxCount, str.size());
+    while (index + count < max && str.at(index + count) == ch) {
+        ++count;
+    }
+    return count;
+}
+
+static inline void appendSeparator(QStringList *list, const QString &string, int from, int size, int lastQuote)
+{
+    QString str(string.mid(from, size));
+    if (lastQuote >= from)
+        str = unquote(str);
+    list->append(str);
+}
+
+
+bool QDateTimeParser::parseFormat(const QString &newFormat)
+{
+    const QLatin1Char quote('\'');
+    const QLatin1Char slash('\\');
+    const QLatin1Char zero('0');
+    if (newFormat == displayFormat && !newFormat.isEmpty()) {
+        return true;
+    }
+
+    QDTPDEBUGN("parseFormat: %s", newFormat.toLatin1().constData());
+
+    QVector<SectionNode> newSectionNodes;
+    Sections newDisplay = 0;
+    QStringList newSeparators;
+    int i, index = 0;
+    int add = 0;
+    QChar status(zero);
+    const int max = newFormat.size();
+    int lastQuote = -1;
+    for (i = 0; i<max; ++i) {
+        if (newFormat.at(i) == quote) {
+            lastQuote = i;
+            ++add;
+            if (status != quote) {
+                status = quote;
+            } else if (newFormat.at(i - 1) != slash) {
+                status = zero;
+            }
+        } else if (status != quote) {
+            const char sect = newFormat.at(i).toLatin1();
+            switch (sect) {
+            case 'H':
+            case 'h':
+                if (parserType != QVariant::Date) {
+                    const Section hour = (sect == 'h') ? Hour12Section : Hour24Section;
+                    const SectionNode sn = { hour, i - add, countRepeat(newFormat, i, 2) };
+                    newSectionNodes.append(sn);
+                    appendSeparator(&newSeparators, newFormat, index, i - index, lastQuote);
+                    i += sn.count - 1;
+                    index = i + 1;
+                    newDisplay |= hour;
+                }
+                break;
+            case 'm':
+                if (parserType != QVariant::Date) {
+                    const SectionNode sn = { MinuteSection, i - add, countRepeat(newFormat, i, 2) };
+                    newSectionNodes.append(sn);
+                    appendSeparator(&newSeparators, newFormat, index, i - index, lastQuote);
+                    i += sn.count - 1;
+                    index = i + 1;
+                    newDisplay |= MinuteSection;
+                }
+                break;
+            case 's':
+                if (parserType != QVariant::Date) {
+                    const SectionNode sn = { SecondSection, i - add, countRepeat(newFormat, i, 2) };
+                    newSectionNodes.append(sn);
+                    appendSeparator(&newSeparators, newFormat, index, i - index, lastQuote);
+                    i += sn.count - 1;
+                    index = i + 1;
+                    newDisplay |= SecondSection;
+                }
+                break;
+
+            case 'z':
+                if (parserType != QVariant::Date) {
+                    const SectionNode sn = { MSecSection, i - add, countRepeat(newFormat, i, 3) < 3 ? 1 : 3 };
+                    newSectionNodes.append(sn);
+                    appendSeparator(&newSeparators, newFormat, index, i - index, lastQuote);
+                    i += sn.count - 1;
+                    index = i + 1;
+                    newDisplay |= MSecSection;
+                }
+                break;
+            case 'A':
+            case 'a':
+                if (parserType != QVariant::Date) {
+                    const bool cap = (sect == 'A');
+                    const SectionNode sn = { AmPmSection, i - add, (cap ? 1 : 0) };
+                    newSectionNodes.append(sn);
+                    appendSeparator(&newSeparators, newFormat, index, i - index, lastQuote);
+                    newDisplay |= AmPmSection;
+                    if (i + 1 < newFormat.size()
+                        && newFormat.at(i+1) == (cap ? QLatin1Char('P') : QLatin1Char('p'))) {
+                        ++i;
+                    }
+                    index = i + 1;
+                }
+                break;
+            case 'y':
+                if (parserType != QVariant::Time) {
+                    const int repeat = countRepeat(newFormat, i, 4);
+                    if (repeat >= 2) {
+                        const SectionNode sn = { repeat == 4 ? YearSection : YearSection2Digits,
+                                                 i - add, repeat == 4 ? 4 : 2 };
+                        newSectionNodes.append(sn);
+                        appendSeparator(&newSeparators, newFormat, index, i - index, lastQuote);
+                        i += sn.count - 1;
+                        index = i + 1;
+                        newDisplay |= sn.type;
+                    }
+                }
+                break;
+            case 'M':
+                if (parserType != QVariant::Time) {
+                    const SectionNode sn = { MonthSection, i - add, countRepeat(newFormat, i, 4) };
+                    newSectionNodes.append(sn);
+                    newSeparators.append(unquote(newFormat.mid(index, i - index)));
+                    i += sn.count - 1;
+                    index = i + 1;
+                    newDisplay |= MonthSection;
+                }
+                break;
+            case 'd':
+                if (parserType != QVariant::Time) {
+                    const int repeat = countRepeat(newFormat, i, 4);
+                    const SectionNode sn = { repeat >= 3 ? DayOfWeekSection : DaySection, i - add, repeat };
+                    newSectionNodes.append(sn);
+                    appendSeparator(&newSeparators, newFormat, index, i - index, lastQuote);
+                    i += sn.count - 1;
+                    index = i + 1;
+                    newDisplay |= sn.type;
+                }
+                break;
+
+            default:
+                break;
+            }
+        }
+    }
+    if (newSectionNodes.isEmpty() && context == DateTimeEdit) {
+        return false;
+    }
+
+    if ((newDisplay & (AmPmSection|Hour12Section)) == Hour12Section) {
+        const int max = newSectionNodes.size();
+        for (int i=0; i<max; ++i) {
+            SectionNode &node = newSectionNodes[i];
+            if (node.type == Hour12Section)
+                node.type = Hour24Section;
+        }
+    }
+
+    if (index < newFormat.size()) {
+        appendSeparator(&newSeparators, newFormat, index, index - max, lastQuote);
+    } else {
+        newSeparators.append(QString());
+    }
+
+    displayFormat = newFormat;
+    separators = newSeparators;
+    sectionNodes = newSectionNodes;
+    display = newDisplay;
+    last.pos = -1;
+
+//     for (int i=0; i<sectionNodes.size(); ++i) {
+//         QDTPDEBUG << sectionName(sectionNodes.at(i).type) << sectionNodes.at(i).count;
+//     }
+
+    QDTPDEBUG << newFormat << displayFormat;
+    QDTPDEBUGN("separators:\n'%s'", separators.join(QLatin1String("\n")).toLatin1().constData());
+
+    return true;
+}
+
+/*!
+  \internal
+
+  Returns the size of section \a s.
+*/
+
+int QDateTimeParser::sectionSize(int sectionIndex) const
+{
+    if (sectionIndex < 0)
+        return 0;
+
+    if (sectionIndex >= sectionNodes.size()) {
+        qWarning("QDateTimeParser::sectionSize Internal error (%d)", sectionIndex);
+        return -1;
+    }
+    if (sectionIndex == sectionNodes.size() - 1) {
+        return displayText().size() - sectionPos(sectionIndex) - separators.last().size();
+    } else {
+        return sectionPos(sectionIndex + 1) - sectionPos(sectionIndex)
+            - separators.at(sectionIndex + 1).size();
+    }
+}
+
+
+int QDateTimeParser::sectionMaxSize(Section s, int count) const
+{
+#ifndef QT_NO_TEXTDATE
+    int mcount = 12;
+#endif
+
+    switch (s) {
+    case FirstSection:
+    case NoSection:
+    case LastSection: return 0;
+
+    case AmPmSection: {
+        const int lowerMax = qMin(getAmPmText(AmText, LowerCase).size(),
+                                  getAmPmText(PmText, LowerCase).size());
+        const int upperMax = qMin(getAmPmText(AmText, UpperCase).size(),
+                                  getAmPmText(PmText, UpperCase).size());
+        return qMin(4, qMin(lowerMax, upperMax));
+    }
+
+    case Hour24Section:
+    case Hour12Section:
+    case MinuteSection:
+    case SecondSection:
+    case DaySection: return 2;
+    case DayOfWeekSection:
+#ifdef QT_NO_TEXTDATE
+        return 2;
+#else
+        mcount = 7;
+        // fall through
+#endif
+    case MonthSection:
+        if (count <= 2)
+            return 2;
+
+#ifdef QT_NO_TEXTDATE
+        return 2;
+#else
+        {
+            int ret = 0;
+            const QLocale l = locale();
+            for (int i=1; i<=mcount; ++i) {
+                const QString str = (s == MonthSection
+                                     ? l.monthName(i, count == 4 ? QLocale::LongFormat : QLocale::ShortFormat)
+                                     : l.dayName(i, count == 4 ? QLocale::LongFormat : QLocale::ShortFormat));
+                ret = qMax(str.size(), ret);
+            }
+            return ret;
+        }
+#endif
+    case MSecSection: return 3;
+    case YearSection: return 4;
+    case YearSection2Digits: return 2;
+
+    case CalendarPopupSection:
+    case Internal:
+    case TimeSectionMask:
+    case DateSectionMask:
+        qWarning("QDateTimeParser::sectionMaxSize: Invalid section %s",
+                 sectionName(s).toLatin1().constData());
+
+    case NoSectionIndex:
+    case FirstSectionIndex:
+    case LastSectionIndex:
+    case CalendarPopupIndex:
+        // these cases can't happen
+        break;
+    }
+    return -1;
+}
+
+
+int QDateTimeParser::sectionMaxSize(int index) const
+{
+    const SectionNode &sn = sectionNode(index);
+    return sectionMaxSize(sn.type, sn.count);
+}
+
+/*!
+  \internal
+
+  Returns the text of section \a s. This function operates on the
+  arg text rather than edit->text().
+*/
+
+
+QString QDateTimeParser::sectionText(const QString &text, int sectionIndex, int index) const
+{
+    const SectionNode &sn = sectionNode(sectionIndex);
+    switch (sn.type) {
+    case NoSectionIndex:
+    case FirstSectionIndex:
+    case LastSectionIndex:
+        return QString();
+    default: break;
+    }
+
+    return text.mid(index, sectionSize(sectionIndex));
+}
+
+QString QDateTimeParser::sectionText(int sectionIndex) const
+{
+    const SectionNode &sn = sectionNode(sectionIndex);
+    switch (sn.type) {
+    case NoSectionIndex:
+    case FirstSectionIndex:
+    case LastSectionIndex:
+        return QString();
+    default: break;
+    }
+
+    return displayText().mid(sn.pos, sectionSize(sectionIndex));
+}
+
+
+#ifndef QT_NO_TEXTDATE
+/*!
+  \internal:skipToNextSection
+
+  Parses the part of \a text that corresponds to \a s and returns
+  the value of that field. Sets *stateptr to the right state if
+  stateptr != 0.
+*/
+
+int QDateTimeParser::parseSection(const QDateTime &currentValue, int sectionIndex,
+                                  QString &text, int &cursorPosition, int index,
+                                  State &state, int *usedptr) const
+{
+    state = Invalid;
+    int num = 0;
+    const SectionNode &sn = sectionNode(sectionIndex);
+    if ((sn.type & Internal) == Internal) {
+        qWarning("QDateTimeParser::parseSection Internal error (%s %d)",
+                 qPrintable(sectionName(sn.type)), sectionIndex);
+        return -1;
+    }
+
+    const int sectionmaxsize = sectionMaxSize(sectionIndex);
+    QString sectiontext = text.mid(index, sectionmaxsize);
+    int sectiontextSize = sectiontext.size();
+
+    QDTPDEBUG << "sectionValue for" << sectionName(sn.type)
+              << "with text" << text << "and st" << sectiontext
+              << text.mid(index, sectionmaxsize)
+              << index;
+
+    int used = 0;
+    switch (sn.type) {
+    case AmPmSection: {
+        const int ampm = findAmPm(sectiontext, sectionIndex, &used);
+        switch (ampm) {
+        case AM: // sectiontext == AM
+        case PM: // sectiontext == PM
+            num = ampm;
+            state = Acceptable;
+            break;
+        case PossibleAM: // sectiontext => AM
+        case PossiblePM: // sectiontext => PM
+            num = ampm - 2;
+            state = Intermediate;
+            break;
+        case PossibleBoth: // sectiontext => AM|PM
+            num = 0;
+            state = Intermediate;
+            break;
+        case Neither:
+            state = Invalid;
+            QDTPDEBUG << "invalid because findAmPm(" << sectiontext << ") returned -1";
+            break;
+        default:
+            QDTPDEBUGN("This should never happen (findAmPm returned %d)", ampm);
+            break;
+        }
+        if (state != Invalid) {
+            QString str = text;
+            text.replace(index, used, sectiontext.left(used));
+        }
+        break; }
+    case MonthSection:
+    case DayOfWeekSection:
+        if (sn.count >= 3) {
+            if (sn.type == MonthSection) {
+                int min = 1;
+                const QDate minDate = getMinimum().date();
+                if (currentValue.date().year() == minDate.year()) {
+                    min = minDate.month();
+                }
+                num = findMonth(sectiontext.toLower(), min, sectionIndex, &sectiontext, &used);
+            } else {
+                num = findDay(sectiontext.toLower(), 1, sectionIndex, &sectiontext, &used);
+            }
+
+            if (num != -1) {
+                state = (used == sectiontext.size() ? Acceptable : Intermediate);
+                QString str = text;
+                text.replace(index, used, sectiontext.left(used));
+            } else {
+                state = Intermediate;
+            }
+            break; }
+        // fall through
+    case DaySection:
+    case YearSection:
+    case YearSection2Digits:
+    case Hour12Section:
+    case Hour24Section:
+    case MinuteSection:
+    case SecondSection:
+    case MSecSection: {
+        if (sectiontextSize == 0) {
+            num = 0;
+            used = 0;
+            state = Intermediate;
+        } else {
+            const int absMax = absoluteMax(sectionIndex);
+            QLocale loc;
+            bool ok = true;
+            int last = -1;
+            used = -1;
+
+            QString digitsStr(sectiontext);
+            for (int i = 0; i < sectiontextSize; ++i) {
+                if (digitsStr.at(i).isSpace()) {
+                    sectiontextSize = i;
+                    break;
+                }
+            }
+
+            const int max = qMin(sectionmaxsize, sectiontextSize);
+            for (int digits = max; digits >= 1; --digits) {
+                digitsStr.truncate(digits);
+                int tmp = (int)loc.toUInt(digitsStr, &ok, 10);
+                if (ok && sn.type == Hour12Section) {
+                    if (tmp > 12) {
+                        tmp = -1;
+                        ok = false;
+                    } else if (tmp == 12) {
+                        tmp = 0;
+                    }
+                }
+                if (ok && tmp <= absMax) {
+                    QDTPDEBUG << sectiontext.left(digits) << tmp << digits;
+                    last = tmp;
+                    used = digits;
+                    break;
+                }
+            }
+
+            if (last == -1) {
+                QChar first(sectiontext.at(0));
+                if (separators.at(sectionIndex + 1).startsWith(first)) {
+                    used = 0;
+                    state = Intermediate;
+                } else {
+                    state = Invalid;
+                    QDTPDEBUG << "invalid because" << sectiontext << "can't become a uint" << last << ok;
+                }
+            } else {
+                num += last;
+                const FieldInfo fi = fieldInfo(sectionIndex);
+                const bool done = (used == sectionmaxsize);
+                if (!done && fi & Fraction) { // typing 2 in a zzz field should be .200, not .002
+                    for (int i=used; i<sectionmaxsize; ++i) {
+                        num *= 10;
+                    }
+                }
+                const int absMin = absoluteMin(sectionIndex);
+                if (num < absMin) {
+                    state = done ? Invalid : Intermediate;
+                    if (done)
+                        QDTPDEBUG << "invalid because" << num << "is less than absoluteMin" << absMin;
+                } else if (num > absMax) {
+                    state = Intermediate;
+                } else if (!done && (fi & (FixedWidth|Numeric)) == (FixedWidth|Numeric)) {
+                    if (skipToNextSection(sectionIndex, currentValue, digitsStr)) {
+                        state = Acceptable;
+                        const int missingZeroes = sectionmaxsize - digitsStr.size();
+                        text.insert(index, QString().fill(QLatin1Char('0'), missingZeroes));
+                        used = sectionmaxsize;
+                        cursorPosition += missingZeroes;
+                    } else {
+                        state = Intermediate;;
+                    }
+                } else {
+                    state = Acceptable;
+                }
+            }
+        }
+        break; }
+    default:
+        qWarning("QDateTimeParser::parseSection Internal error (%s %d)",
+                 qPrintable(sectionName(sn.type)), sectionIndex);
+        return -1;
+    }
+
+    if (usedptr)
+        *usedptr = used;
+
+    return (state != Invalid ? num : -1);
+}
+#endif // QT_NO_TEXTDATE
+
+#ifndef QT_NO_DATESTRING
+/*!
+  \internal
+*/
+
+QDateTimeParser::StateNode QDateTimeParser::parse(QString &input, int &cursorPosition,
+                                                  const QDateTime &currentValue, bool fixup) const
+{
+    const QDateTime minimum = getMinimum();
+    const QDateTime maximum = getMaximum();
+
+    State state = Acceptable;
+
+    QDateTime newCurrentValue;
+    int pos = 0;
+    bool conflicts = false;
+    const int sectionNodesCount = sectionNodes.size();
+
+    QDTPDEBUG << "parse" << input;
+    {
+        int year, month, day, hour12, hour, minute, second, msec, ampm, dayofweek, year2digits;
+        getDateFromJulianDay(currentValue.date().toJulianDay(), &year, &month, &day);
+        year2digits = year % 100;
+        hour = currentValue.time().hour();
+        hour12 = -1;
+        minute = currentValue.time().minute();
+        second = currentValue.time().second();
+        msec = currentValue.time().msec();
+        dayofweek = currentValue.date().dayOfWeek();
+
+        ampm = -1;
+        Sections isSet = NoSection;
+        int num;
+        State tmpstate;
+
+        for (int index=0; state != Invalid && index<sectionNodesCount; ++index) {
+            if (QStringRef(&input, pos, separators.at(index).size()) != separators.at(index)) {
+                QDTPDEBUG << "invalid because" << input.mid(pos, separators.at(index).size())
+                          << "!=" << separators.at(index)
+                          << index << pos << currentSectionIndex;
+                state = Invalid;
+                goto end;
+            }
+            pos += separators.at(index).size();
+            sectionNodes[index].pos = pos;
+            int *current = 0;
+            const SectionNode sn = sectionNodes.at(index);
+            int used;
+
+            num = parseSection(currentValue, index, input, cursorPosition, pos, tmpstate, &used);
+            QDTPDEBUG << "sectionValue" << sectionName(sectionType(index)) << input
+                      << "pos" << pos << "used" << used << stateName(tmpstate);
+            if (fixup && tmpstate == Intermediate && used < sn.count) {
+                const FieldInfo fi = fieldInfo(index);
+                if ((fi & (Numeric|FixedWidth)) == (Numeric|FixedWidth)) {
+                    const QString newText = QString::fromLatin1("%1").arg(num, sn.count, 10, QLatin1Char('0'));
+                    input.replace(pos, used, newText);
+                    used = sn.count;
+                }
+            }
+            pos += qMax(0, used);
+
+            state = qMin<State>(state, tmpstate);
+            if (state == Intermediate && context == FromString) {
+                state = Invalid;
+                break;
+            }
+
+            QDTPDEBUG << index << sectionName(sectionType(index)) << "is set to"
+                      << pos << "state is" << stateName(state);
+
+
+            if (state != Invalid) {
+                switch (sn.type) {
+                case Hour24Section: current = &hour; break;
+                case Hour12Section: current = &hour12; break;
+                case MinuteSection: current = &minute; break;
+                case SecondSection: current = &second; break;
+                case MSecSection: current = &msec; break;
+                case YearSection: current = &year; break;
+                case YearSection2Digits: current = &year2digits; break;
+                case MonthSection: current = &month; break;
+                case DayOfWeekSection: current = &dayofweek; break;
+                case DaySection: current = &day; num = qMax<int>(1, num); break;
+                case AmPmSection: current = &ampm; break;
+                default:
+                    qWarning("QDateTimeParser::parse Internal error (%s)",
+                             qPrintable(sectionName(sn.type)));
+                    break;
+                }
+                if (!current) {
+                    qWarning("QDateTimeParser::parse Internal error 2");
+                    return StateNode();
+                }
+                if (isSet & sn.type && *current != num) {
+                    QDTPDEBUG << "CONFLICT " << sectionName(sn.type) << *current << num;
+                    conflicts = true;
+                    if (index != currentSectionIndex || num == -1) {
+                        continue;
+                    }
+                }
+                if (num != -1)
+                    *current = num;
+                isSet |= sn.type;
+            }
+        }
+
+        if (state != Invalid && QStringRef(&input, pos, input.size() - pos) != separators.last()) {
+            QDTPDEBUG << "invalid because" << input.mid(pos)
+                      << "!=" << separators.last() << pos;
+            state = Invalid;
+        }
+
+        if (state != Invalid) {
+            if (parserType != QVariant::Time) {
+                if (year % 100 != year2digits) {
+                    switch (isSet & (YearSection2Digits|YearSection)) {
+                    case YearSection2Digits:
+                        year = (year / 100) * 100;
+                        year += year2digits;
+                        break;
+                    case ((uint)YearSection2Digits|(uint)YearSection): {
+                        conflicts = true;
+                        const SectionNode &sn = sectionNode(currentSectionIndex);
+                        if (sn.type == YearSection2Digits) {
+                            year = (year / 100) * 100;
+                            year += year2digits;
+                        }
+                        break; }
+                    default:
+                        break;
+                    }
+                }
+
+                const QDate date(year, month, day);
+                const int diff = dayofweek - date.dayOfWeek();
+                if (diff != 0 && state == Acceptable && isSet & DayOfWeekSection) {
+                    conflicts = isSet & DaySection;
+                    const SectionNode &sn = sectionNode(currentSectionIndex);
+                    if (sn.type == DayOfWeekSection || currentSectionIndex == -1) {
+                        // dayofweek should be preferred
+                        day += diff;
+                        if (day <= 0) {
+                            day += 7;
+                        } else if (day > date.daysInMonth()) {
+                            day -= 7;
+                        }
+                        QDTPDEBUG << year << month << day << dayofweek
+                                  << diff << QDate(year, month, day).dayOfWeek();
+                    }
+                }
+                bool needfixday = false;
+                if (sectionType(currentSectionIndex) & (DaySection|DayOfWeekSection)) {
+                    cachedDay = day;
+                } else if (cachedDay > day) {
+                    day = cachedDay;
+                    needfixday = true;
+                }
+
+                if (!QDate::isValid(year, month, day)) {
+                    if (day < 32) {
+                        cachedDay = day;
+                    }
+                    if (day > 28 && QDate::isValid(year, month, 1)) {
+                        needfixday = true;
+                    }
+                }
+                if (needfixday) {
+                    if (context == FromString) {
+                        state = Invalid;
+                        goto end;
+                    }
+                    if (state == Acceptable && fixday) {
+                        day = qMin<int>(day, QDate(year, month, 1).daysInMonth());
+
+                        const QLocale loc = locale();
+                        for (int i=0; i<sectionNodesCount; ++i) {
+                            if (sectionType(i) & (DaySection|DayOfWeekSection)) {
+                                input.replace(sectionPos(i), sectionSize(i), loc.toString(day));
+                            }
+                        }
+                    } else {
+                        state = qMin(Intermediate, state);
+                    }
+                }
+            }
+
+            if (parserType != QVariant::Date) {
+                if (isSet & Hour12Section) {
+                    const bool hasHour = isSet & Hour24Section;
+                    if (ampm == -1) {
+                        if (hasHour) {
+                            ampm = (hour < 12 ? 0 : 1);
+                        } else {
+                            ampm = 0; // no way to tell if this is am or pm so I assume am
+                        }
+                    }
+                    hour12 = (ampm == 0 ? hour12 % 12 : (hour12 % 12) + 12);
+                    if (!hasHour) {
+                        hour = hour12;
+                    } else if (hour != hour12) {
+                        conflicts = true;
+                    }
+                } else if (ampm != -1) {
+                    if (!(isSet & (Hour24Section))) {
+                        hour = (12 * ampm); // special case. Only ap section
+                    } else if ((ampm == 0) != (hour < 12)) {
+                        conflicts = true;
+                    }
+                }
+
+            }
+
+            newCurrentValue = QDateTime(QDate(year, month, day), QTime(hour, minute, second, msec), spec);
+            QDTPDEBUG << year << month << day << hour << minute << second << msec;
+        }
+        QDTPDEBUGN("'%s' => '%s'(%s)", input.toLatin1().constData(),
+                   newCurrentValue.toString(QLatin1String("yyyy/MM/dd hh:mm:ss.zzz")).toLatin1().constData(),
+                   stateName(state).toLatin1().constData());
+    }
+end:
+    if (newCurrentValue.isValid()) {
+        if (context != FromString && state != Invalid && newCurrentValue < minimum) {
+            const QLatin1Char space(' ');
+            if (newCurrentValue >= minimum)
+                qWarning("QDateTimeParser::parse Internal error 3 (%s %s)",
+                         qPrintable(newCurrentValue.toString()), qPrintable(minimum.toString()));
+
+            bool done = false;
+            state = Invalid;
+            for (int i=0; i<sectionNodesCount && !done; ++i) {
+                const SectionNode &sn = sectionNodes.at(i);
+                QString t = sectionText(input, i, sn.pos).toLower();
+                if ((t.size() < sectionMaxSize(i) && (((int)fieldInfo(i) & (FixedWidth|Numeric)) != Numeric))
+                    || t.contains(space)) {
+                    switch (sn.type) {
+                    case AmPmSection:
+                        switch (findAmPm(t, i)) {
+                        case AM:
+                        case PM:
+                            state = Acceptable;
+                            done = true;
+                            break;
+                        case Neither:
+                            state = Invalid;
+                            done = true;
+                            break;
+                        case PossibleAM:
+                        case PossiblePM:
+                        case PossibleBoth: {
+                            const QDateTime copy(newCurrentValue.addSecs(12 * 60 * 60));
+                            if (copy >= minimum && copy <= maximum) {
+                                state = Intermediate;
+                                done = true;
+                            }
+                            break; }
+                        }
+                    case MonthSection:
+                        if (sn.count >= 3) {
+                            int tmp = newCurrentValue.date().month();
+                            // I know the first possible month makes the date too early
+                            while ((tmp = findMonth(t, tmp + 1, i)) != -1) {
+                                const QDateTime copy(newCurrentValue.addMonths(tmp - newCurrentValue.date().month()));
+                                if (copy >= minimum && copy <= maximum)
+                                    break; // break out of while
+                            }
+                            if (tmp == -1) {
+                                break;
+                            }
+                            state = Intermediate;
+                            done = true;
+                            break;
+                        }
+                        // fallthrough
+                    default: {
+                        int toMin;
+                        int toMax;
+
+                        if (sn.type & TimeSectionMask) {
+                            if (newCurrentValue.daysTo(minimum) != 0) {
+                                break;
+                            }
+                            toMin = newCurrentValue.time().msecsTo(minimum.time());
+                            if (newCurrentValue.daysTo(maximum) > 0) {
+                                toMax = -1; // can't get to max
+                            } else {
+                                toMax = newCurrentValue.time().msecsTo(maximum.time());
+                            }
+                        } else {
+                            toMin = newCurrentValue.daysTo(minimum);
+                            toMax = newCurrentValue.daysTo(maximum);
+                        }
+                        const int maxChange = QDateTimeParser::maxChange(i);
+                        if (toMin > maxChange) {
+                            QDTPDEBUG << "invalid because toMin > maxChange" << toMin
+                                      << maxChange << t << newCurrentValue << minimum;
+                            state = Invalid;
+                            done = true;
+                            break;
+                        } else if (toMax > maxChange) {
+                            toMax = -1; // can't get to max
+                        }
+
+                        const int min = getDigit(minimum, i);
+                        if (min == -1) {
+                            qWarning("QDateTimeParser::parse Internal error 4 (%s)",
+                                     qPrintable(sectionName(sn.type)));
+                            state = Invalid;
+                            done = true;
+                            break;
+                        }
+
+                        int max = toMax != -1 ? getDigit(maximum, i) : absoluteMax(i, newCurrentValue);
+                        int pos = cursorPosition - sn.pos;
+                        if (pos < 0 || pos >= t.size())
+                            pos = -1;
+                        if (!potentialValue(t.simplified(), min, max, i, newCurrentValue, pos)) {
+                            QDTPDEBUG << "invalid because potentialValue(" << t.simplified() << min << max
+                                      << sectionName(sn.type) << "returned" << toMax << toMin << pos;
+                            state = Invalid;
+                            done = true;
+                            break;
+                        }
+                        state = Intermediate;
+                        done = true;
+                        break; }
+                    }
+                }
+            }
+        } else {
+            if (context == FromString) {
+                // optimization
+                Q_ASSERT(getMaximum().date().toJulianDay() == 4642999);
+                if (newCurrentValue.date().toJulianDay() > 4642999)
+                    state = Invalid;
+            } else {
+                if (newCurrentValue > getMaximum())
+                    state = Invalid;
+            }
+
+            QDTPDEBUG << "not checking intermediate because newCurrentValue is" << newCurrentValue << getMinimum() << getMaximum();
+        }
+    }
+    StateNode node;
+    node.input = input;
+    node.state = state;
+    node.conflicts = conflicts;
+    node.value = newCurrentValue.toTimeSpec(spec);
+    text = input;
+    return node;
+}
+#endif // QT_NO_DATESTRING
+
+#ifndef QT_NO_TEXTDATE
+/*!
+  \internal finds the first possible monthname that \a str1 can
+  match. Starting from \a index; str should already by lowered
+*/
+
+int QDateTimeParser::findMonth(const QString &str1, int startMonth, int sectionIndex,
+                               QString *usedMonth, int *used) const
+{
+    int bestMatch = -1;
+    int bestCount = 0;
+    if (!str1.isEmpty()) {
+        const SectionNode &sn = sectionNode(sectionIndex);
+        if (sn.type != MonthSection) {
+            qWarning("QDateTimeParser::findMonth Internal error");
+            return -1;
+        }
+
+        QLocale::FormatType type = sn.count == 3 ? QLocale::ShortFormat : QLocale::LongFormat;
+        QLocale l = locale();
+
+        for (int month=startMonth; month<=12; ++month) {
+            QString str2 = l.monthName(month, type).toLower();
+
+            if (str1.startsWith(str2)) {
+                if (used) {
+                    QDTPDEBUG << "used is set to" << str2.size();
+                    *used = str2.size();
+                }
+                if (usedMonth)
+                    *usedMonth = l.monthName(month, type);
+
+                return month;
+            }
+            if (context == FromString)
+                continue;
+
+            const int limit = qMin(str1.size(), str2.size());
+
+            QDTPDEBUG << "limit is" << limit << str1 << str2;
+            bool equal = true;
+            for (int i=0; i<limit; ++i) {
+                if (str1.at(i) != str2.at(i)) {
+                    equal = false;
+                    if (i > bestCount) {
+                        bestCount = i;
+                        bestMatch = month;
+                    }
+                    break;
+                }
+            }
+            if (equal) {
+                if (used)
+                    *used = limit;
+                if (usedMonth)
+                    *usedMonth = l.monthName(month, type);
+                return month;
+            }
+        }
+        if (usedMonth && bestMatch != -1)
+            *usedMonth = l.monthName(bestMatch, type);
+    }
+    if (used) {
+        QDTPDEBUG << "used is set to" << bestCount;
+        *used = bestCount;
+    }
+    return bestMatch;
+}
+
+int QDateTimeParser::findDay(const QString &str1, int startDay, int sectionIndex, QString *usedDay, int *used) const
+{
+    int bestMatch = -1;
+    int bestCount = 0;
+    if (!str1.isEmpty()) {
+        const SectionNode &sn = sectionNode(sectionIndex);
+        if (!(sn.type & (DaySection|DayOfWeekSection))) {
+            qWarning("QDateTimeParser::findDay Internal error");
+            return -1;
+        }
+        const QLocale l = locale();
+        for (int day=startDay; day<=7; ++day) {
+            const QString str2 = l.dayName(day, sn.count == 4 ? QLocale::LongFormat : QLocale::ShortFormat);
+
+            if (str1.startsWith(str2.toLower())) {
+                if (used)
+                    *used = str2.size();
+                if (usedDay) {
+                    *usedDay = str2;
+                }
+                return day;
+            }
+            if (context == FromString)
+                continue;
+
+            const int limit = qMin(str1.size(), str2.size());
+            bool found = true;
+            for (int i=0; i<limit; ++i) {
+                if (str1.at(i) != str2.at(i) && !str1.at(i).isSpace()) {
+                    if (i > bestCount) {
+                        bestCount = i;
+                        bestMatch = day;
+                    }
+                    found = false;
+                    break;
+                }
+
+            }
+            if (found) {
+                if (used)
+                    *used = limit;
+                if (usedDay)
+                    *usedDay = str2;
+
+                return day;
+            }
+        }
+        if (usedDay && bestMatch != -1) {
+            *usedDay = l.dayName(bestMatch, sn.count == 4 ? QLocale::LongFormat : QLocale::ShortFormat);
+        }
+    }
+    if (used)
+        *used = bestCount;
+
+    return bestMatch;
+}
+#endif // QT_NO_TEXTDATE
+
+/*!
+  \internal
+
+  returns
+  0 if str == QDateTimeEdit::tr("AM")
+  1 if str == QDateTimeEdit::tr("PM")
+  2 if str can become QDateTimeEdit::tr("AM")
+  3 if str can become QDateTimeEdit::tr("PM")
+  4 if str can become QDateTimeEdit::tr("PM") and can become QDateTimeEdit::tr("AM")
+  -1 can't become anything sensible
+
+*/
+
+int QDateTimeParser::findAmPm(QString &str, int index, int *used) const
+{
+    const SectionNode &s = sectionNode(index);
+    if (s.type != AmPmSection) {
+        qWarning("QDateTimeParser::findAmPm Internal error");
+        return -1;
+    }
+    if (used)
+        *used = str.size();
+    if (str.trimmed().isEmpty()) {
+        return PossibleBoth;
+    }
+    const QLatin1Char space(' ');
+    int size = sectionMaxSize(index);
+
+    enum {
+        amindex = 0,
+        pmindex = 1
+    };
+    QString ampm[2];
+    ampm[amindex] = getAmPmText(AmText, s.count == 1 ? UpperCase : LowerCase);
+    ampm[pmindex] = getAmPmText(PmText, s.count == 1 ? UpperCase : LowerCase);
+    for (int i=0; i<2; ++i)
+        ampm[i].truncate(size);
+
+    QDTPDEBUG << "findAmPm" << str << ampm[0] << ampm[1];
+
+    if (str.indexOf(ampm[amindex], 0, Qt::CaseInsensitive) == 0) {
+        str = ampm[amindex];
+        return AM;
+    } else if (str.indexOf(ampm[pmindex], 0, Qt::CaseInsensitive) == 0) {
+        str = ampm[pmindex];
+        return PM;
+    } else if (context == FromString || (str.count(space) == 0 && str.size() >= size)) {
+        return Neither;
+    }
+    size = qMin(size, str.size());
+
+    bool broken[2] = {false, false};
+    for (int i=0; i<size; ++i) {
+        if (str.at(i) != space) {
+            for (int j=0; j<2; ++j) {
+                if (!broken[j]) {
+                    int index = ampm[j].indexOf(str.at(i));
+                    QDTPDEBUG << "looking for" << str.at(i)
+                              << "in" << ampm[j] << "and got" << index;
+                    if (index == -1) {
+                        if (str.at(i).category() == QChar::Letter_Uppercase) {
+                            index = ampm[j].indexOf(str.at(i).toLower());
+                            QDTPDEBUG << "trying with" << str.at(i).toLower()
+                                      << "in" << ampm[j] << "and got" << index;
+                        } else if (str.at(i).category() == QChar::Letter_Lowercase) {
+                            index = ampm[j].indexOf(str.at(i).toUpper());
+                            QDTPDEBUG << "trying with" << str.at(i).toUpper()
+                                      << "in" << ampm[j] << "and got" << index;
+                        }
+                        if (index == -1) {
+                            broken[j] = true;
+                            if (broken[amindex] && broken[pmindex]) {
+                                QDTPDEBUG << str << "didn't make it";
+                                return Neither;
+                            }
+                            continue;
+                        } else {
+                            str[i] = ampm[j].at(index); // fix case
+                        }
+                    }
+                    ampm[j].remove(index, 1);
+                }
+            }
+        }
+    }
+    if (!broken[pmindex] && !broken[amindex])
+        return PossibleBoth;
+    return (!broken[amindex] ? PossibleAM : PossiblePM);
+}
+
+/*!
+  \internal
+  Max number of units that can be changed by this section.
+*/
+
+int QDateTimeParser::maxChange(int index) const
+{
+    const SectionNode &sn = sectionNode(index);
+    switch (sn.type) {
+        // Time. unit is msec
+    case MSecSection: return 999;
+    case SecondSection: return 59 * 1000;
+    case MinuteSection: return 59 * 60 * 1000;
+    case Hour24Section: case Hour12Section: return 59 * 60 * 60 * 1000;
+
+        // Date. unit is day
+    case DayOfWeekSection: return 7;
+    case DaySection: return 30;
+    case MonthSection: return 365 - 31;
+    case YearSection: return 9999 * 365;
+    case YearSection2Digits: return 100 * 365;
+    default:
+        qWarning("QDateTimeParser::maxChange() Internal error (%s)",
+                 qPrintable(sectionName(sectionType(index))));
+    }
+
+    return -1;
+}
+
+QDateTimeParser::FieldInfo QDateTimeParser::fieldInfo(int index) const
+{
+    FieldInfo ret = 0;
+    const SectionNode &sn = sectionNode(index);
+    const Section s = sn.type;
+    switch (s) {
+    case MSecSection:
+        ret |= Fraction;
+        // fallthrough
+    case SecondSection:
+    case MinuteSection:
+    case Hour24Section:
+    case Hour12Section:
+    case YearSection:
+    case YearSection2Digits:
+        ret |= Numeric;
+        if (s != YearSection) {
+            ret |= AllowPartial;
+        }
+        if (sn.count != 1) {
+            ret |= FixedWidth;
+        }
+        break;
+    case MonthSection:
+    case DaySection:
+        switch (sn.count) {
+        case 2:
+            ret |= FixedWidth;
+            // fallthrough
+        case 1:
+            ret |= (Numeric|AllowPartial);
+            break;
+        }
+        break;
+    case DayOfWeekSection:
+        if (sn.count == 3)
+            ret |= FixedWidth;
+        break;
+    case AmPmSection:
+        ret |= FixedWidth;
+        break;
+    default:
+        qWarning("QDateTimeParser::fieldInfo Internal error 2 (%d %s %d)",
+                 index, qPrintable(sectionName(sn.type)), sn.count);
+        break;
+    }
+    return ret;
+}
+
+/*!
+  \internal Get a number that str can become which is between min
+  and max or -1 if this is not possible.
+*/
+
+
+QString QDateTimeParser::sectionFormat(int index) const
+{
+    const SectionNode &sn = sectionNode(index);
+    return sectionFormat(sn.type, sn.count);
+}
+
+QString QDateTimeParser::sectionFormat(Section s, int count) const
+{
+    QChar fillChar;
+    switch (s) {
+    case AmPmSection: return count == 1 ? QLatin1String("AP") : QLatin1String("ap");
+    case MSecSection: fillChar = QLatin1Char('z'); break;
+    case SecondSection: fillChar = QLatin1Char('s'); break;
+    case MinuteSection: fillChar = QLatin1Char('m'); break;
+    case Hour24Section: fillChar = QLatin1Char('H'); break;
+    case Hour12Section: fillChar = QLatin1Char('h'); break;
+    case DayOfWeekSection:
+    case DaySection: fillChar = QLatin1Char('d'); break;
+    case MonthSection: fillChar = QLatin1Char('M'); break;
+    case YearSection2Digits:
+    case YearSection: fillChar = QLatin1Char('y'); break;
+    default:
+        qWarning("QDateTimeParser::sectionFormat Internal error (%s)",
+                 qPrintable(sectionName(s)));
+        return QString();
+    }
+    if (fillChar.isNull()) {
+        qWarning("QDateTimeParser::sectionFormat Internal error 2");
+        return QString();
+    }
+
+    QString str;
+    str.fill(fillChar, count);
+    return str;
+}
+
+
+/*! \internal Returns true if str can be modified to represent a
+  number that is within min and max.
+*/
+
+bool QDateTimeParser::potentialValue(const QString &str, int min, int max, int index,
+                                     const QDateTime &currentValue, int insert) const
+{
+    if (str.isEmpty()) {
+        return true;
+    }
+    const int size = sectionMaxSize(index);
+    int val = (int)locale().toUInt(str);
+    const SectionNode &sn = sectionNode(index);
+    if (sn.type == YearSection2Digits) {
+        val += currentValue.date().year() - (currentValue.date().year() % 100);
+    }
+    if (val >= min && val <= max && str.size() == size) {
+        return true;
+    } else if (val > max) {
+        return false;
+    } else if (str.size() == size && val < min) {
+        return false;
+    }
+
+    const int len = size - str.size();
+    for (int i=0; i<len; ++i) {
+        for (int j=0; j<10; ++j) {
+            if (potentialValue(str + QLatin1Char('0' + j), min, max, index, currentValue, insert)) {
+                return true;
+            } else if (insert >= 0) {
+                QString tmp = str;
+                tmp.insert(insert, QLatin1Char('0' + j));
+                if (potentialValue(tmp, min, max, index, currentValue, insert))
+                    return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+bool QDateTimeParser::skipToNextSection(int index, const QDateTime &current, const QString &text) const
+{
+    Q_ASSERT(current >= getMinimum() && current <= getMaximum());
+
+    const SectionNode &node = sectionNode(index);
+    Q_ASSERT(text.size() < sectionMaxSize(index));
+
+    const QDateTime maximum = getMaximum();
+    const QDateTime minimum = getMinimum();
+    QDateTime tmp = current;
+    int min = absoluteMin(index);
+    setDigit(tmp, index, min);
+    if (tmp < minimum) {
+        min = getDigit(minimum, index);
+    }
+
+    int max = absoluteMax(index, current);
+    setDigit(tmp, index, max);
+    if (tmp > maximum) {
+        max = getDigit(maximum, index);
+    }
+    int pos = cursorPosition() - node.pos;
+    if (pos < 0 || pos >= text.size())
+        pos = -1;
+
+    const bool potential = potentialValue(text, min, max, index, current, pos);
+    return !potential;
+
+    /* If the value potentially can become another valid entry we
+     * don't want to skip to the next. E.g. In a M field (month
+     * without leading 0 if you type 1 we don't want to autoskip but
+     * if you type 3 we do
+    */
+}
+
+/*!
+  \internal
+  For debugging. Returns the name of the section \a s.
+*/
+
+QString QDateTimeParser::sectionName(int s) const
+{
+    switch (s) {
+    case QDateTimeParser::AmPmSection: return QLatin1String("AmPmSection");
+    case QDateTimeParser::DaySection: return QLatin1String("DaySection");
+    case QDateTimeParser::DayOfWeekSection: return QLatin1String("DayOfWeekSection");
+    case QDateTimeParser::Hour24Section: return QLatin1String("Hour24Section");
+    case QDateTimeParser::Hour12Section: return QLatin1String("Hour12Section");
+    case QDateTimeParser::MSecSection: return QLatin1String("MSecSection");
+    case QDateTimeParser::MinuteSection: return QLatin1String("MinuteSection");
+    case QDateTimeParser::MonthSection: return QLatin1String("MonthSection");
+    case QDateTimeParser::SecondSection: return QLatin1String("SecondSection");
+    case QDateTimeParser::YearSection: return QLatin1String("YearSection");
+    case QDateTimeParser::YearSection2Digits: return QLatin1String("YearSection2Digits");
+    case QDateTimeParser::NoSection: return QLatin1String("NoSection");
+    case QDateTimeParser::FirstSection: return QLatin1String("FirstSection");
+    case QDateTimeParser::LastSection: return QLatin1String("LastSection");
+    default: return QLatin1String("Unknown section ") + QString::number(s);
+    }
+}
+
+/*!
+  \internal
+  For debugging. Returns the name of the state \a s.
+*/
+
+QString QDateTimeParser::stateName(int s) const
+{
+    switch (s) {
+    case Invalid: return QLatin1String("Invalid");
+    case Intermediate: return QLatin1String("Intermediate");
+    case Acceptable: return QLatin1String("Acceptable");
+    default: return QLatin1String("Unknown state ") + QString::number(s);
+    }
+}
+
+#ifndef QT_NO_DATESTRING
+bool QDateTimeParser::fromString(const QString &t, QDate *date, QTime *time) const
+{
+    QDateTime val(QDate(1900, 1, 1), QDATETIMEEDIT_TIME_MIN);
+    QString text = t;
+    int copy = -1;
+    const StateNode tmp = parse(text, copy, val, false);
+    if (tmp.state != Acceptable || tmp.conflicts) {
+        return false;
+    }
+    if (time) {
+        const QTime t = tmp.value.time();
+        if (!t.isValid()) {
+            return false;
+        }
+        *time = t;
+    }
+
+    if (date) {
+        const QDate d = tmp.value.date();
+        if (!d.isValid()) {
+            return false;
+        }
+        *date = d;
+    }
+    return true;
+}
+#endif // QT_NO_DATESTRING
+
+QDateTime QDateTimeParser::getMinimum() const
+{
+    return QDateTime(QDATETIMEEDIT_DATE_MIN, QDATETIMEEDIT_TIME_MIN, spec);
+}
+
+QDateTime QDateTimeParser::getMaximum() const
+{
+    return QDateTime(QDATETIMEEDIT_DATE_MAX, QDATETIMEEDIT_TIME_MAX, spec);
+}
+
+QString QDateTimeParser::getAmPmText(AmPm ap, Case cs) const
+{
+    if (ap == AmText) {
+        return (cs == UpperCase ? QLatin1String("AM") : QLatin1String("am"));
+    } else {
+        return (cs == UpperCase ? QLatin1String("PM") : QLatin1String("pm"));
+    }
+}
+
+/*
+  \internal
+
+  I give arg2 preference because arg1 is always a QDateTime.
+*/
+
+bool operator==(const QDateTimeParser::SectionNode &s1, const QDateTimeParser::SectionNode &s2)
+{
+    return (s1.type == s2.type) && (s1.pos == s2.pos) && (s1.count == s2.count);
+}
+
+#ifdef Q_OS_SYMBIAN
+const static TTime UnixEpochOffset(I64LIT(0xdcddb30f2f8000));
+const static TInt64 MinimumMillisecondTime(KMinTInt64 / 1000);
+const static TInt64 MaximumMillisecondTime(KMaxTInt64 / 1000);
+QDateTime qt_symbian_TTime_To_QDateTime(const TTime& time)
+{
+    TTimeIntervalMicroSeconds absolute = time.MicroSecondsFrom(UnixEpochOffset);
+
+    return QDateTime::fromMSecsSinceEpoch(absolute.Int64() / 1000);
+}
+
+TTime qt_symbian_QDateTime_To_TTime(const QDateTime& datetime)
+{
+    qint64 absolute = datetime.toMSecsSinceEpoch();
+    if(absolute > MaximumMillisecondTime)
+        return TTime(KMaxTInt64);
+    if(absolute < MinimumMillisecondTime)
+        return TTime(KMinTInt64);
+    return TTime(absolute * 1000);
+}
+
+time_t qt_symbian_TTime_To_time_t(const TTime& time)
+{
+    TTimeIntervalSeconds interval;
+    TInt err = time.SecondsFrom(UnixEpochOffset, interval);
+    if (err || interval.Int() < 0)
+        return (time_t) 0;
+    return (time_t) interval.Int();
+}
+
+TTime qt_symbian_time_t_To_TTime(time_t time)
+{
+    return UnixEpochOffset + TTimeIntervalSeconds(time);
+}
+#endif //Q_OS_SYMBIAN
+
+#endif // QT_BOOTSTRAPPED
+
+QT_END_NAMESPACE