Add Qt3 development HEAD version

1 files changed, 2600 insertions, 0 deletions

diff --git a/src/tools/qdatetime.cpp b/src/tools/qdatetime.cpp
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+/****************************************************************************
+**
+** Implementation of date and time classes
+**
+** Created : 940124
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of the tools module of the Qt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free Qt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing requirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at [email protected].
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.QPL
+** included in the packaging of this file.  Licensees holding valid Qt
+** Commercial licenses may use this file in accordance with the Qt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#include "qplatformdefs.h"
+
+#include "qdatetime.h"
+#include "qdatastream.h"
+#include "qregexp.h"
+
+#include <stdio.h>
+#ifndef Q_OS_TEMP
+#include <time.h>
+#endif
+
+#if defined(Q_OS_WIN32)
+#include <windows.h>
+#endif
+
+static const uint FIRST_DAY	= 2361222;	// Julian day for 1752-09-14
+static const int  FIRST_YEAR	= 1752;		// ### wrong for many countries
+static const uint SECS_PER_DAY	= 86400;
+static const uint MSECS_PER_DAY = 86400000;
+static const uint SECS_PER_HOUR = 3600;
+static const uint MSECS_PER_HOUR= 3600000;
+static const uint SECS_PER_MIN	= 60;
+static const uint MSECS_PER_MIN = 60000;
+
+static const short monthDays[] = {
+    0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+
+static const char * const qt_shortMonthNames[] = {
+	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
+
+#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::null;
+
+    QString buf = f;
+
+    if ( dt ) {
+	if ( f == "h" ) {
+	    if ( ( am_pm ) && ( dt->hour() > 12 ) )
+		buf = QString::number( dt->hour() - 12 );
+	    else if ( ( am_pm ) && ( dt->hour() == 0 ) )
+		buf = "12";
+	    else
+		buf = QString::number( dt->hour() );
+	} else if ( f == "hh" ) {
+	    if ( ( am_pm ) && ( dt->hour() > 12 ) )
+		buf = QString::number( dt->hour() - 12 ).rightJustify( 2, '0', TRUE );
+	    else if ( ( am_pm ) && ( dt->hour() == 0 ) )
+		buf = "12";
+	    else
+		buf = QString::number( dt->hour() ).rightJustify( 2, '0', TRUE );
+	} else if ( f == "m" ) {
+	    buf = QString::number( dt->minute() );
+	} else if ( f == "mm" ) {
+	    buf = QString::number( dt->minute() ).rightJustify( 2, '0', TRUE );
+	} else if ( f == "s" ) {
+	    buf = QString::number( dt->second() );
+	} else if ( f == "ss" ) {
+	    buf = QString::number( dt->second() ).rightJustify( 2, '0', TRUE );
+	} else if ( f == "z" ) {
+	    buf = QString::number( dt->msec() );
+	} else if ( f == "zzz" ) {
+	    buf = QString::number( dt->msec() ).rightJustify( 3, '0', TRUE );
+	} else if ( f == "ap" ) {
+	    buf = dt->hour() < 12 ? "am" : "pm";
+	} else if ( f == "AP" ) {
+	    buf = dt->hour() < 12 ? "AM" : "PM";
+	}
+    }
+
+    if ( dd ) {
+	if ( f == "d" ) {
+	    buf = QString::number( dd->day() );
+	} else if ( f == "dd" ) {
+	    buf = QString::number( dd->day() ).rightJustify( 2, '0', TRUE );
+	} else if ( f == "M" ) {
+	    buf = QString::number( dd->month() );
+	} else if ( f == "MM" ) {
+	    buf = QString::number( dd->month() ).rightJustify( 2, '0', TRUE );
+#ifndef QT_NO_TEXTDATE
+	} else if ( f == "ddd" ) {
+	    buf = dd->shortDayName( dd->dayOfWeek() );
+	} else if ( f == "dddd" ) {
+	    buf = dd->longDayName( dd->dayOfWeek() );
+	} else if ( f == "MMM" ) {
+	    buf = dd->shortMonthName( dd->month() );
+	} else if ( f == "MMMM" ) {
+	    buf = dd->longMonthName( dd->month() );
+#endif
+	} else if ( f == "yy" ) {
+	    buf = QString::number( dd->year() ).right( 2 );
+	} else if ( f == "yyyy" ) {
+	    buf = QString::number( dd->year() );
+	}
+    }
+
+    return buf;
+}
+
+// Parses the format string and uses getFmtString to get the values for the tokens. Ret
+static QString fmtDateTime( const QString& f, const QTime* dt = 0, const QDate* dd = 0 )
+{
+    if ( f.isEmpty() ) {
+	return QString::null;
+    }
+
+    if ( dt && !dt->isValid() )
+	return QString::null;
+    if ( dd && !dd->isValid() )
+	return QString::null;
+
+    bool ap = ( f.contains( "AP" ) || f.contains( "ap" ) );
+
+    QString buf;
+    QString frm;
+    QChar status = '0';
+
+    for ( int i = 0; i < (int)f.length(); ++i ) {
+
+	if ( f[ i ] == status ) {
+	    if ( ( ap ) && ( ( f[ i ] == 'P' ) || ( f[ i ] == 'p' ) ) )
+		status = '0';
+	    frm += f[ i ];
+	} else {
+	    buf += getFmtString( frm, dt, dd, ap );
+	    frm = QString::null;
+	    if ( ( f[ i ] == 'h' ) || ( f[ i ] == 'm' ) || ( f[ i ] == 's' ) || ( f[ i ] == 'z' ) ) {
+		status = f[ i ];
+		frm += f[ i ];
+	    } else if ( ( f[ i ] == 'd' ) || ( f[ i ] == 'M' ) || ( f[ i ] == 'y' ) ) {
+		status = f[ i ];
+		frm += f[ i ];
+	    } else if ( ( ap ) && ( f[ i ] == 'A' ) ) {
+		status = 'P';
+		frm += f[ i ];
+	    } else  if( ( ap ) && ( f[ i ] == 'a' ) ) {
+		status = 'p';
+		frm += f[ i ];
+	    } else {
+		buf += f[ i ];
+		status = '0';
+	    }
+	}
+    }
+
+    buf += getFmtString( frm, dt, dd, ap );
+
+    return buf;
+}
+#endif // QT_NO_DATESTRING
+
+/*****************************************************************************
+  QDate member functions
+ *****************************************************************************/
+
+/*!
+    \class QDate qdatetime.h
+    \reentrant
+    \brief The QDate class provides date functions.
+
+    \ingroup time
+    \mainclass
+
+    A QDate object contains a calendar date, i.e. year, month, and day
+    numbers, in the modern Western (Gregorian) calendar. It can read
+    the current date from the system clock. It provides functions for
+    comparing dates and for manipulating dates, e.g. by adding a
+    number of days or months or years.
+
+    A QDate object is typically created either by giving the year,
+    month and day numbers explicitly, or by using the static function
+    currentDate(), which creates a QDate object containing the system
+    clock's date. An explicit date can also be set using setYMD(). 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
+    leapYear() function indicates whether this date is in a leap year.
+
+    Note that QDate should not be used for date calculations for dates
+    prior to the introduction of the Gregorian calendar. This calendar
+    was adopted by England from the 14<sup><small>th</small></sup>
+    September 1752 (hence this is the earliest valid QDate), and
+    subsequently by most other Western countries, until 1923.
+
+    The end of time is reached around the year 8000, by which time we
+    expect Qt to be obsolete.
+
+    \sa QTime QDateTime QDateEdit QDateTimeEdit
+*/
+
+/*!
+    \enum Qt::DateFormat
+
+    \value TextDate (default) Qt format
+    \value ISODate ISO 8601 extended format (YYYY-MM-DD, or with time,
+    YYYY-MM-DDTHH:MM:SS)
+    \value LocalDate locale dependent format
+*/
+
+
+/*!
+    \enum Qt::TimeSpec
+
+    \value LocalTime Locale dependent time (Timezones and Daylight Savings Time)
+    \value UTC Coordinated Universal Time, replaces Greenwich Time
+*/
+
+/*!
+    \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.
+
+    \a y must be in the range 1752..8000, \a m must be in the range
+    1..12, and \a d must be in the range 1..31.
+
+    \warning If \a y is in the range 0..99, it is interpreted as
+    1900..1999.
+
+    \sa isValid()
+*/
+
+QDate::QDate( int y, int m, int d )
+{
+    jd = 0;
+    setYMD( y, m, d );
+}
+
+
+/*!
+    \fn bool QDate::isNull() const
+
+    Returns TRUE if the date is null; otherwise returns FALSE. A null
+    date is invalid.
+
+    \sa isValid()
+*/
+
+
+/*!
+    Returns TRUE if this date is valid; otherwise returns FALSE.
+
+    \sa isNull()
+*/
+
+bool QDate::isValid() const
+{
+    return jd >= FIRST_DAY;
+}
+
+
+/*!
+    Returns the year (1752..8000) of this date.
+
+    \sa month(), day()
+*/
+
+int QDate::year() const
+{
+    int y, m, d;
+    julianToGregorian( jd, y, m, d );
+    return y;
+}
+
+/*!
+    Returns the month (January=1..December=12) of this date.
+
+    \sa year(), day()
+*/
+
+int QDate::month() const
+{
+    int y, m, d;
+    julianToGregorian( jd, y, m, d );
+    return m;
+}
+
+/*!
+    Returns the day of the month (1..31) of this date.
+
+    \sa year(), month(), dayOfWeek()
+*/
+
+int QDate::day() const
+{
+    int y, m, d;
+    julianToGregorian( jd, y, m, d );
+    return d;
+}
+
+/*!
+    Returns the weekday (Monday=1..Sunday=7) for this date.
+
+    \sa day(), dayOfYear()
+*/
+
+int QDate::dayOfWeek() const
+{
+    return ( jd % 7 ) + 1;
+}
+
+/*!
+    Returns the day of the year (1..365) for this date.
+
+    \sa day(), dayOfWeek()
+*/
+
+int QDate::dayOfYear() const
+{
+    return jd - gregorianToJulian(year(), 1, 1) + 1;
+}
+
+/*!
+    Returns the number of days in the month (28..31) for this date.
+
+    \sa day(), daysInYear()
+*/
+
+int QDate::daysInMonth() const
+{
+    int y, m, d;
+    julianToGregorian( jd, y, m, d );
+    if ( m == 2 && leapYear(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;
+    julianToGregorian( jd, y, m, d );
+    return leapYear( 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 = leapYear(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 += leapYear(year) ? 366 : 365;
+    }
+    if (yearNumber != 0)
+    	*yearNumber = year;
+    return w;
+}
+
+/*!
+  \fn QString QDate::monthName( int month )
+  \obsolete
+
+  Use shortMonthName() instead.
+*/
+#ifndef QT_NO_TEXTDATE
+/*!
+    Returns the name of the \a month.
+
+    1 = "Jan", 2 = "Feb", ... 12 = "Dec"
+
+    The month names will be localized according to the system's locale
+    settings.
+
+    \sa toString(), longMonthName(), shortDayName(), longDayName()
+*/
+
+QString QDate::shortMonthName( int month )
+{
+#if defined(QT_CHECK_RANGE)
+    if ( month < 1 || month > 12 ) {
+	qWarning( "QDate::shortMonthName: Parameter out ouf range" );
+	month = 1;
+    }
+#endif
+#ifndef Q_WS_WIN
+    char buffer[255];
+    tm tt;
+    memset( &tt, 0, sizeof( tm ) );
+    tt.tm_mon = month - 1;
+    if ( strftime( buffer, sizeof( buffer ), "%b", &tt ) )
+	return QString::fromLocal8Bit( buffer );
+#else
+    SYSTEMTIME st;
+    memset( &st, 0, sizeof(SYSTEMTIME) );
+    st.wYear = 2000;
+    st.wMonth = month;
+    st.wDay = 1;
+    const wchar_t mmm_t[] = L"MMM"; // workaround for Borland
+    QT_WA( {
+	TCHAR buf[255];
+	if ( GetDateFormat( LOCALE_USER_DEFAULT, 0, &st, mmm_t, buf, 255 ) )
+	    return QString::fromUcs2( (ushort*)buf );
+    } , {
+	char buf[255];
+	if ( GetDateFormatA( LOCALE_USER_DEFAULT, 0, &st, "MMM", (char*)&buf, 255 ) )
+	    return QString::fromLocal8Bit( buf );
+    } );
+#endif
+    return QString::null;
+}
+
+/*!
+    Returns the long name of the \a month.
+
+    1 = "January", 2 = "February", ... 12 = "December"
+
+    The month names will be localized according to the system's locale
+    settings.
+
+    \sa toString(), shortMonthName(), shortDayName(), longDayName()
+*/
+
+QString QDate::longMonthName( int month )
+{
+#if defined(QT_CHECK_RANGE)
+    if ( month < 1 || month > 12 ) {
+	qWarning( "QDate::longMonthName: Parameter out ouf range" );
+	month = 1;
+    }
+#endif
+#ifndef Q_WS_WIN
+    char buffer[255];
+    tm tt;
+    memset( &tt, 0, sizeof( tm ) );
+    tt.tm_mon = month - 1;
+    if ( strftime( buffer, sizeof( buffer ), "%B", &tt ) )
+	return QString::fromLocal8Bit( buffer );
+#else
+    SYSTEMTIME st;
+    memset( &st, 0, sizeof(SYSTEMTIME) );
+    st.wYear = 2000;
+    st.wMonth = month;
+    st.wDay = 1 ;
+    const wchar_t mmmm_t[] = L"MMMM"; // workaround for Borland
+    QT_WA( {
+	TCHAR buf[255];
+	if ( GetDateFormat( LOCALE_USER_DEFAULT, 0, &st, mmmm_t, buf, 255 ) )
+	    return QString::fromUcs2( (ushort*)buf );
+    } , {
+	char buf[255];
+	if ( GetDateFormatA( LOCALE_USER_DEFAULT, 0, &st, "MMMM", (char*)&buf, 255 ) )
+	    return QString::fromLocal8Bit( buf );
+    } )
+#endif
+
+    return QString::null;
+}
+
+/*!
+  \fn QString QDate::dayName( int weekday )
+  \obsolete
+
+  Use shortDayName() instead.
+*/
+
+/*!
+    Returns the name of the \a weekday.
+
+    1 = "Mon", 2 = "Tue", ... 7 = "Sun"
+
+    The day names will be localized according to the system's locale
+    settings.
+
+    \sa toString(), shortMonthName(), longMonthName(), longDayName()
+*/
+
+QString QDate::shortDayName( int weekday )
+{
+#if defined(QT_CHECK_RANGE)
+    if ( weekday < 1 || weekday > 7 ) {
+	qWarning( "QDate::shortDayName: Parameter out of range" );
+	weekday = 1;
+    }
+#endif
+#ifndef Q_WS_WIN
+    char buffer[255];
+    tm tt;
+    memset( &tt, 0, sizeof( tm ) );
+    tt.tm_wday = ( weekday == 7 ) ? 0 : weekday;
+    if ( strftime( buffer, sizeof( buffer ), "%a", &tt ) )
+	return QString::fromLocal8Bit( buffer );
+#else
+    SYSTEMTIME st;
+    memset( &st, 0, sizeof(SYSTEMTIME) );
+    st.wYear = 2001;
+    st.wMonth = 10;
+    st.wDayOfWeek = ( weekday == 7 ) ? 0 : weekday;
+    st.wDay = 21 + st.wDayOfWeek;
+    const wchar_t ddd_t[] = L"ddd"; // workaround for Borland
+    QT_WA( {
+	TCHAR buf[255];
+	if ( GetDateFormat( LOCALE_USER_DEFAULT, 0, &st, ddd_t, buf, 255 ) )
+	    return QString::fromUcs2( (ushort*)buf );
+    } , {
+	char buf[255];
+	if ( GetDateFormatA( LOCALE_USER_DEFAULT, 0, &st, "ddd", (char*)&buf, 255 ) )
+	    return QString::fromLocal8Bit( buf );
+    } );
+#endif
+
+    return QString::null;
+}
+
+/*!
+    Returns the long name of the \a weekday.
+
+    1 = "Monday", 2 = "Tuesday", ... 7 = "Sunday"
+
+    The day names will be localized according to the system's locale
+    settings.
+
+    \sa toString(), shortDayName(), shortMonthName(), longMonthName()
+*/
+
+QString QDate::longDayName( int weekday )
+{
+#if defined(QT_CHECK_RANGE)
+    if ( weekday < 1 || weekday > 7 ) {
+	qWarning( "QDate::longDayName: Parameter out of range" );
+	weekday = 1;
+    }
+#endif
+#ifndef Q_WS_WIN
+    char buffer[255];
+    tm tt;
+    memset( &tt, 0, sizeof( tm ) );
+    tt.tm_wday = ( weekday == 7 ) ? 0 : weekday;
+    if ( strftime( buffer, sizeof( buffer ), "%A", &tt ) )
+	return QString::fromLocal8Bit( buffer );
+#else
+    SYSTEMTIME st;
+    memset( &st, 0, sizeof(SYSTEMTIME) );
+    st.wYear = 2001;
+    st.wMonth = 10;
+    st.wDayOfWeek = ( weekday == 7 ) ? 0 : weekday;
+    st.wDay = 21 + st.wDayOfWeek;
+    const wchar_t dddd_t[] = L"dddd"; // workaround for Borland
+    QT_WA( {
+	TCHAR buf[255];
+	if ( GetDateFormat( LOCALE_USER_DEFAULT, 0, &st, dddd_t, buf, 255 ) )
+	    return QString::fromUcs2( (ushort*)buf );
+    } , {
+	char buf[255];
+	if ( GetDateFormatA( LOCALE_USER_DEFAULT, 0, &st, "dddd", (char*)&buf, 255 ) )
+	    return QString::fromLocal8Bit( buf );
+    } );
+#endif
+
+    return QString::null;
+}
+#endif //QT_NO_TEXTDATE
+
+#ifndef QT_NO_DATESTRING
+
+#if !defined(QT_NO_SPRINTF)
+/*!
+    \overload
+
+    Returns the date as a string. The \a f parameter determines the
+    format of the string.
+
+    If \a f is \c Qt::TextDate, the string format is "Sat May 20 1995"
+    (using the shortDayName() and shortMonthName() functions to
+    generate the string, so the day and month names are locale
+    specific).
+
+    If \a f is \c Qt::ISODate, the string format corresponds to the
+    ISO 8601 specification for representations of dates, which is
+    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 \a f is \c Qt::LocalDate, the string format depends on the
+    locale settings of the system.
+
+    If the date is an invalid date, then QString::null will be returned.
+
+    \sa shortDayName(), shortMonthName()
+*/
+QString QDate::toString( Qt::DateFormat f ) const
+{
+    if ( !isValid() )
+	return QString::null;
+    int y, m, d;
+    julianToGregorian( jd, y, m, d );
+    switch ( f ) {
+    case Qt::LocalDate:
+	{
+#ifndef Q_WS_WIN
+	    tm tt;
+	    memset( &tt, 0, sizeof( tm ) );
+	    char buf[255];
+	    tt.tm_mday = day();
+	    tt.tm_mon = month() - 1;
+	    tt.tm_year = year() - 1900;
+
+	    static const char * avoidEgcsWarning = "%x";
+	    if ( strftime( buf, sizeof(buf), avoidEgcsWarning, &tt ) )
+		return QString::fromLocal8Bit( buf );
+#else
+	    SYSTEMTIME st;
+	    memset( &st, 0, sizeof(SYSTEMTIME) );
+	    st.wYear = year();
+	    st.wMonth = month();
+	    st.wDay = day();
+	    QT_WA( {
+		TCHAR buf[255];
+		if ( GetDateFormat( LOCALE_USER_DEFAULT, 0, &st, 0, buf, 255 ) )
+		    return QString::fromUcs2( (ushort*)buf );
+	    } , {
+		char buf[255];
+		if ( GetDateFormatA( LOCALE_USER_DEFAULT, 0, &st, 0, (char*)&buf, 255 ) )
+		    return QString::fromLocal8Bit( buf );
+	    } );
+#endif
+	    return QString::null;
+	}
+    default:
+#ifndef QT_NO_TEXTDATE
+    case Qt::TextDate:
+	{
+	    QString buf = shortDayName( dayOfWeek() );
+	    buf += ' ';
+	    buf += shortMonthName( m );
+	    QString t;
+	    t.sprintf( " %d %d", d, y );
+	    buf += t;
+	    return buf;
+	}
+#endif
+    case Qt::ISODate:
+	{
+	    QString month( QString::number( m ).rightJustify( 2, '0' ) );
+	    QString day( QString::number( d ).rightJustify( 2, '0' ) );
+	    return QString::number( y ) + "-" + month + "-" + day;
+	}
+    }
+}
+#endif //QT_NO_SPRINTF
+
+/*!
+    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 (1-31)
+    \row \i dd \i the day as number with a leading zero (01-31)
+    \row \i ddd
+	 \i the abbreviated localized day name (e.g. 'Mon'..'Sun').
+	    Uses QDate::shortDayName().
+    \row \i dddd
+	 \i the long localized day name (e.g. 'Monday'..'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'..'Dec').
+	    Uses QDate::shortMonthName().
+    \row \i MMMM
+	 \i the long localized month name (e.g. 'January'..'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 (1752-8000)
+    \endtable
+
+    All other input characters will be ignored.
+
+    Example format strings (assuming that the QDate is the
+    20<sup><small>th</small></sup> July 1969):
+    \table
+    \header \i Format \i Result
+    \row \i dd.MM.yyyy	  \i11 20.07.1969
+    \row \i ddd MMMM d yy \i11 Sun July 20 69
+    \endtable
+
+    If the date is an invalid date, then QString::null will be returned.
+
+    \sa QDateTime::toString() QTime::toString()
+
+*/
+QString QDate::toString( const QString& format ) const
+{
+    return fmtDateTime( format, 0, this );
+}
+#endif //QT_NO_DATESTRING
+
+/*!
+    Sets the date's year \a y, month \a m and day \a d.
+
+    \a y must be in the range 1752..8000, \a m must be in the range
+    1..12, and \a d must be in the range 1..31.
+
+    \warning If \a y is in the range 0..99, it is interpreted as
+    1900..1999.
+
+    Returns TRUE if the date is valid; otherwise returns FALSE.
+*/
+
+bool QDate::setYMD( int y, int m, int d )
+{
+    if ( year() == y && month() == m && day() == d )
+	return isValid();
+    if ( !isValid(y,m,d) ) {
+#if defined(QT_CHECK_RANGE)
+	 qWarning( "QDate::setYMD: Invalid date %04d-%02d-%02d", y, m, d );
+#endif
+	 return FALSE;
+    }
+    jd = gregorianToJulian( y, m, d );
+    return TRUE;
+}
+
+/*!
+    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;
+    d.jd = jd + ndays;
+    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).
+
+    \sa addDays() addYears()
+*/
+
+QDate QDate::addMonths( int nmonths ) const
+{
+    int y, m, d;
+    julianToGregorian( jd, y, m, d );
+
+    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;
+	    }
+	}
+    }
+
+    QDate tmp(y,m,1);
+
+    if( d > tmp.daysInMonth() )
+	d = tmp.daysInMonth();
+
+    QDate date(y, m, d);
+    return date;
+
+}
+
+/*!
+    Returns a QDate object containing a date \a nyears later than the
+    date of this object (or earlier if \a nyears is negative).
+
+    \sa addDays(), addMonths()
+*/
+
+QDate QDate::addYears( int nyears ) const
+{
+    int y, m, d;
+    julianToGregorian( jd, y, m, d );
+    y += nyears;
+
+    QDate tmp(y,m,1);
+
+    if( d > tmp.daysInMonth() )
+	d = tmp.daysInMonth();
+
+    QDate date(y, m, d);
+    return date;
+}
+
+
+
+/*!
+    Returns the number of days from this date to \a d (which is
+    negative if \a d is earlier than this date).
+
+    Example:
+    \code
+	QDate d1( 1995, 5, 17 );  // May 17th 1995
+	QDate d2( 1995, 5, 20 );  // May 20th 1995
+	d1.daysTo( d2 );          // returns 3
+	d2.daysTo( d1 );          // returns -3
+    \endcode
+
+    \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.
+*/
+
+/*!
+    \overload
+    Returns the current date, as reported by the system clock.
+
+    \sa QTime::currentTime(), QDateTime::currentDateTime()
+*/
+
+QDate QDate::currentDate()
+{
+    return currentDate( Qt::LocalTime );
+}
+
+/*!
+  Returns the current date, as reported by the system clock, for the
+  TimeSpec \a ts. The default TimeSpec is LocalTime.
+
+  \sa QTime::currentTime(), QDateTime::currentDateTime(), Qt::TimeSpec
+*/
+QDate QDate::currentDate( Qt::TimeSpec ts )
+{
+    QDate d;
+#if defined(Q_OS_WIN32)
+    SYSTEMTIME t;
+    memset( &t, 0, sizeof(SYSTEMTIME) );
+    if ( ts == Qt::LocalTime )
+	GetLocalTime( &t );
+    else
+	GetSystemTime( &t );
+    d.jd = gregorianToJulian( t.wYear, t.wMonth, t.wDay );
+#else
+    // posix compliant system
+    time_t ltime;
+    time( &ltime );
+    tm *t;
+
+#  if defined(QT_THREAD_SUPPORT) && defined(_POSIX_THREAD_SAFE_FUNCTIONS)
+    // use the reentrant versions of localtime() and gmtime() where available
+    tm res;
+    if ( ts == Qt::LocalTime )
+	t = localtime_r( &ltime, &res );
+    else
+	t = gmtime_r( &ltime, &res );
+#  else
+    if ( ts == Qt::LocalTime )
+	t = localtime( &ltime );
+    else
+	t = gmtime( &ltime );
+#  endif // QT_THREAD_SUPPORT && _POSIX_THREAD_SAFE_FUNCTIONS
+
+    d.jd = gregorianToJulian( t->tm_year + 1900, t->tm_mon + 1, t->tm_mday );
+#endif
+    return d;
+}
+
+#ifndef QT_NO_DATESTRING
+/*!
+    Returns the QDate represented by the string \a s, using the format
+    \a f, or an invalid date if the string cannot be parsed.
+
+    Note for \c 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.
+
+    \warning \c Qt::LocalDate cannot be used here.
+*/
+QDate QDate::fromString( const QString& s, Qt::DateFormat f )
+{
+    if ( ( s.isEmpty() ) || ( f == Qt::LocalDate ) ) {
+#if defined(QT_CHECK_RANGE)
+	qWarning( "QDate::fromString: Parameter out of range" );
+#endif
+	QDate d;
+	d.jd = 0;
+	return d;
+    }
+    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;
+    default:
+#ifndef QT_NO_TEXTDATE
+    case Qt::TextDate:
+	{
+	    /*
+	      This will fail gracefully if the input string doesn't
+	      contain any space.
+	    */
+	    int monthPos = s.find( ' ' ) + 1;
+	    int dayPos = s.find( ' ', monthPos ) + 1;
+
+	    QString monthName( s.mid(monthPos, dayPos - monthPos - 1) );
+	    int month = -1;
+
+	    // try English names first
+	    for ( int i = 0; i < 12; i++ ) {
+		if ( monthName == qt_shortMonthNames[i] ) {
+		    month = i + 1;
+		    break;
+		}
+	    }
+
+	    // try the localized names
+	    if ( month == -1 ) {
+		for ( int i = 0; i < 12; i++ ) {
+		    if ( monthName == shortMonthName( i + 1 ) ) {
+			month = i + 1;
+			break;
+		    }
+		}
+	    }
+#if defined(QT_CHECK_RANGE)
+	    if ( month < 1 || month > 12 ) {
+		qWarning( "QDate::fromString: Parameter out of range" );
+		QDate d;
+		d.jd = 0;
+		return d;
+	    }
+#endif
+	    int day = s.mid( dayPos, 2 ).stripWhiteSpace().toInt();
+	    int year = s.right( 4 ).toInt();
+	    return QDate( year, month, day );
+	}
+#else
+	break;
+#endif
+    }
+    return QDate();
+}
+#endif //QT_NO_DATESTRING
+
+/*!
+    \overload
+
+    Returns TRUE if the specified date (year \a y, month \a m and day
+    \a d) is valid; otherwise returns FALSE.
+
+    Example:
+    \code
+    QDate::isValid( 2002, 5, 17 );  // TRUE   May 17th 2002 is valid
+    QDate::isValid( 2002, 2, 30 );  // FALSE  Feb 30th does not exist
+    QDate::isValid( 2004, 2, 29 );  // TRUE   2004 is a leap year
+    QDate::isValid( 1202, 6, 6 );   // FALSE  1202 is pre-Gregorian
+    \endcode
+
+    \warning A \a y value in the range 00..99 is interpreted as
+    1900..1999.
+
+    \sa isNull(), setYMD()
+*/
+
+bool QDate::isValid( int y, int m, int d )
+{
+    if ( y >= 0 && y <= 99 )
+	y += 1900;
+    else if ( y < FIRST_YEAR || (y == FIRST_YEAR && (m < 9 ||
+						    (m == 9 && d < 14))) )
+	return FALSE;
+    return (d > 0 && m > 0 && m <= 12) &&
+	   (d <= monthDays[m] || (d == 29 && m == 2 && leapYear(y)));
+}
+
+/*!
+    Returns TRUE if the specified year \a y is a leap year; otherwise
+    returns FALSE.
+*/
+
+bool QDate::leapYear( int y )
+{
+    return y % 4 == 0 && y % 100 != 0 || y % 400 == 0;
+}
+
+/*!
+  \internal
+  Converts a Gregorian date to a Julian day.
+  This algorithm is taken from Communications of the ACM, Vol 6, No 8.
+  \sa julianToGregorian()
+*/
+
+uint QDate::gregorianToJulian( int y, int m, int d )
+{
+    uint c, ya;
+    if ( y <= 99 )
+	y += 1900;
+    if ( m > 2 ) {
+	m -= 3;
+    } else {
+	m += 9;
+	y--;
+    }
+    c = y;					// NOTE: Sym C++ 6.0 bug
+    c /= 100;
+    ya = y - 100*c;
+    return 1721119 + d + (146097*c)/4 + (1461*ya)/4 + (153*m+2)/5;
+}
+
+/*!
+  \internal
+  Converts a Julian day to a Gregorian date.
+  This algorithm is taken from Communications of the ACM, Vol 6, No 8.
+  \sa gregorianToJulian()
+*/
+
+void QDate::julianToGregorian( uint jd, int &y, int &m, int &d )
+{
+    uint x;
+    uint j = jd - 1721119;
+    y = (j*4 - 1)/146097;
+    j = j*4 - 146097*y - 1;
+    x = j/4;
+    j = (x*4 + 3) / 1461;
+    y = 100*y + j;
+    x = (x*4) + 3 - 1461*j;
+    x = (x + 4)/4;
+    m = (5*x - 3)/153;
+    x = 5*x - 3 - 153*m;
+    d = (x + 5)/5;
+    if ( m < 10 ) {
+	m += 3;
+    } else {
+	m -= 9;
+	y++;
+    }
+}
+
+
+/*****************************************************************************
+  QTime member functions
+ *****************************************************************************/
+
+/*!
+    \class QTime qdatetime.h
+    \reentrant
+
+    \brief The QTime class provides clock time functions.
+
+    \ingroup time
+    \mainclass
+
+    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 (milli)seconds.
+
+    QTime uses the 24-hour clock format; it has no concept of AM/PM.
+    It operates in local time; it knows nothing about time zones or
+    daylight savings time.
+
+    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 clock 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 (milli)seconds between
+    two times can be found using the secsTo() or msecsTo() functions.
+
+    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 the time 0 hours, minutes, seconds and milliseconds,
+    i.e. 00:00:00.000 (midnight). This is a valid time.
+
+    \sa 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..23, \a m and \a s must be in the
+    range 0..59, and \a ms must be in the range 0..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 equal to 00:00:00.000; otherwise
+    returns FALSE. A null time is valid.
+
+    \sa isValid()
+*/
+
+/*!
+    Returns TRUE if the time is valid; otherwise returns FALSE. The
+    time 23:30:55.746 is valid, whereas 24:12:30 is invalid.
+
+    \sa isNull()
+*/
+
+bool QTime::isValid() const
+{
+    return ds < MSECS_PER_DAY;
+}
+
+
+/*!
+    Returns the hour part (0..23) of the time.
+*/
+
+int QTime::hour() const
+{
+    return ds / MSECS_PER_HOUR;
+}
+
+/*!
+    Returns the minute part (0..59) of the time.
+*/
+
+int QTime::minute() const
+{
+    return (ds % MSECS_PER_HOUR)/MSECS_PER_MIN;
+}
+
+/*!
+    Returns the second part (0..59) of the time.
+*/
+
+int QTime::second() const
+{
+    return (ds / 1000)%SECS_PER_MIN;
+}
+
+/*!
+    Returns the millisecond part (0..999) of the time.
+*/
+
+int QTime::msec() const
+{
+    return ds % 1000;
+}
+
+#ifndef QT_NO_DATESTRING
+#ifndef QT_NO_SPRINTF
+/*!
+    \overload
+
+    Returns the time as a string. Milliseconds are not included. The
+    \a f parameter determines the format of the string.
+
+    If \a f is \c Qt::TextDate, the string format is HH:MM:SS; e.g. 1
+    second before midnight would be "23:59:59".
+
+    If \a f is \c Qt::ISODate, the string format corresponds to the
+    ISO 8601 extended specification for representations of dates,
+    which is also HH:MM:SS.
+
+    If \a f is Qt::LocalDate, the string format depends on the locale
+    settings of the system.
+
+    If the time is an invalid time, then QString::null will be returned.
+*/
+
+QString QTime::toString( Qt::DateFormat f ) const
+{
+    if ( !isValid() )
+	return QString::null;
+
+    switch ( f ) {
+    case Qt::LocalDate:
+	{
+#ifndef Q_WS_WIN
+	    tm tt;
+	    memset( &tt, 0, sizeof( tm ) );
+	    char buf[255];
+	    tt.tm_sec = second();
+	    tt.tm_min = minute();
+	    tt.tm_hour = hour();
+	    if ( strftime( buf, sizeof(buf), "%X", &tt ) )
+		return QString::fromLocal8Bit( buf );
+#else
+	    SYSTEMTIME st;
+	    memset( &st, 0, sizeof(SYSTEMTIME) );
+	    st.wHour = hour();
+	    st.wMinute = minute();
+	    st.wSecond = second();
+	    st.wMilliseconds = 0;
+	    QT_WA( {
+		TCHAR buf[255];
+		if ( GetTimeFormat( LOCALE_USER_DEFAULT, 0, &st, 0, buf, 255 ) )
+		    return QString::fromUcs2( (ushort*)buf );
+	    } , {
+		char buf[255];
+		if ( GetTimeFormatA( LOCALE_USER_DEFAULT, 0, &st, 0, (char*)&buf, 255 ) )
+		    return QString::fromLocal8Bit( buf );
+	    } );
+#endif
+	    return QString::null;
+	}
+    default:
+    case Qt::ISODate:
+    case Qt::TextDate:
+	QString buf;
+	buf.sprintf( "%.2d:%.2d:%.2d", hour(), minute(), second() );
+	return buf;
+    }
+}
+#endif
+
+/*!
+    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..23 or 1..12 if AM/PM display)
+    \row \i hh
+	 \i the hour with a leading zero (00..23 or 01..12 if AM/PM display)
+    \row \i m \i the minute without a leading zero (0..59)
+    \row \i mm \i the minute with a leading zero (00..59)
+    \row \i s \i the second whithout a leading zero (0..59)
+    \row \i ss \i the second whith a leading zero (00..59)
+    \row \i z \i the milliseconds without leading zeroes (0..999)
+    \row \i zzz \i the milliseconds with leading zeroes (000..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.
+
+    Example format strings (assuming that the QTime is 14:13:09.042)
+
+    \table
+    \header \i Format \i Result
+    \row \i hh:mm:ss.zzz    \i11 14:13:09.042
+    \row \i h:m:s ap	    \i11 2:13:9 pm
+    \endtable
+
+    If the time is an invalid time, then QString::null will be returned.
+
+    \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..23, \a m and \a s must be in the
+    range 0..59, and \a ms must be in the range 0..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 ( !isValid(h,m,s,ms) ) {
+#if defined(QT_CHECK_RANGE)
+	qWarning( "QTime::setHMS Invalid time %02d:%02d:%02d.%03d", h, m, s,
+		 ms );
+#endif
+	ds = MSECS_PER_DAY;		// make this invalid
+	return FALSE;
+    }
+    ds = (h*SECS_PER_HOUR + m*SECS_PER_MIN + s)*1000 + ms;
+    return TRUE;
+}
+
+/*!
+    Returns a QTime object containing a time \a nsecs seconds later
+    than the time of this object (or earlier if \a nsecs is negative).
+
+    Note that the time will wrap if it passes midnight.
+
+    Example:
+    \code
+    QTime n( 14, 0, 0 );                // n == 14:00:00
+    QTime t;
+    t = n.addSecs( 70 );                // t == 14:01:10
+    t = n.addSecs( -70 );               // t == 13:58:50
+    t = n.addSecs( 10*60*60 + 5 );      // t == 00:00:05
+    t = n.addSecs( -15*60*60 );         // t == 23:00:00
+    \endcode
+
+    \sa addMSecs(), secsTo(), QDateTime::addSecs()
+*/
+
+QTime QTime::addSecs( int nsecs ) const
+{
+    return addMSecs( nsecs * 1000 );
+}
+
+/*!
+    Returns the number of seconds from this time to \a t (which is
+    negative if \a t is earlier than this time).
+
+    Because QTime measures time within a day and there are 86400
+    seconds in a day, the result is always between -86400 and 86400.
+
+    \sa addSecs() QDateTime::secsTo()
+*/
+
+int QTime::secsTo( const QTime &t ) const
+{
+    return ((int)t.ds - (int)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()
+*/
+
+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.ds = ((int)ds + ms + negdays*MSECS_PER_DAY)
+		% MSECS_PER_DAY;
+    } else {
+	t.ds = ((int)ds + ms) % MSECS_PER_DAY;
+    }
+    return t;
+}
+
+/*!
+    Returns the number of milliseconds from this time to \a t (which
+    is negative if \a t is earlier than this time).
+
+    Because QTime measures time within a day and there are 86400
+    seconds in a day, the result is always between -86400000 and
+    86400000 msec.
+
+    \sa secsTo()
+*/
+
+int QTime::msecsTo( const QTime &t ) const
+{
+    return (int)t.ds - (int)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.
+*/
+
+
+
+/*!
+    \overload
+
+    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.
+*/
+
+QTime QTime::currentTime()
+{
+    return currentTime( Qt::LocalTime );
+}
+
+/*!
+  Returns the current time as reported by the system clock, for the
+  TimeSpec \a ts. The default TimeSpec is LocalTime.
+
+  Note that the accuracy depends on the accuracy of the underlying
+  operating system; not all systems provide 1-millisecond accuracy.
+
+  \sa Qt::TimeSpec
+*/
+QTime QTime::currentTime( Qt::TimeSpec ts )
+{
+    QTime t;
+    currentTime( &t, ts );
+    return t;
+}
+
+#ifndef QT_NO_DATESTRING
+/*!
+    Returns the representation \a s as a QTime using the format \a f,
+    or an invalid time if this is not possible.
+
+    \warning Note that \c Qt::LocalDate cannot be used here.
+*/
+QTime QTime::fromString( const QString& s, Qt::DateFormat f )
+{
+    if ( ( s.isEmpty() ) || ( f == Qt::LocalDate ) ) {
+#if defined(QT_CHECK_RANGE)
+	qWarning( "QTime::fromString: Parameter out of range" );
+#endif
+	QTime t;
+	t.ds = MSECS_PER_DAY;
+	return t;
+    }
+
+    int hour( s.mid( 0, 2 ).toInt() );
+    int minute( s.mid( 3, 2 ).toInt() );
+    int second( s.mid( 6, 2 ).toInt() );
+    int msec( s.mid( 9, 3 ).toInt() );
+    return QTime( hour, minute, second, msec );
+}
+#endif
+
+/*!
+  \internal
+  \obsolete
+
+  Fetches the current time and returns TRUE if the time is within one
+  minute after midnight, otherwise FALSE. The return value is used by
+  QDateTime::currentDateTime() to ensure that the date there is correct.
+*/
+
+bool QTime::currentTime( QTime *ct )
+{
+    return currentTime( ct, Qt::LocalTime );
+}
+
+
+/*!
+  \internal
+
+  Fetches the current time, for the TimeSpec \a ts, and returns TRUE
+  if the time is within one minute after midnight, otherwise FALSE. The
+  return value is used by QDateTime::currentDateTime() to ensure that
+  the date there is correct. The default TimeSpec is LocalTime.
+
+  \sa Qt::TimeSpec
+*/
+bool QTime::currentTime( QTime *ct, Qt::TimeSpec ts )
+{
+    if ( !ct ) {
+#if defined(QT_CHECK_NULL)
+	qWarning( "QTime::currentTime(QTime *): Null pointer not allowed" );
+#endif
+	return FALSE;
+    }
+
+#if defined(Q_OS_WIN32)
+    SYSTEMTIME t;
+    if ( ts == Qt::LocalTime ) {
+	GetLocalTime( &t );
+    } else {
+	GetSystemTime( &t );
+    }
+    ct->ds = (uint)( MSECS_PER_HOUR*t.wHour + MSECS_PER_MIN*t.wMinute +
+		     1000*t.wSecond + t.wMilliseconds );
+#elif defined(Q_OS_UNIX)
+    // posix compliant system
+    struct timeval tv;
+    gettimeofday( &tv, 0 );
+    time_t ltime = tv.tv_sec;
+    tm *t;
+
+#  if defined(QT_THREAD_SUPPORT) && defined(_POSIX_THREAD_SAFE_FUNCTIONS)
+    // use the reentrant versions of localtime() and gmtime() where available
+    tm res;
+    if ( ts == Qt::LocalTime )
+	t = localtime_r( &ltime, &res );
+    else
+	t = gmtime_r( &ltime, &res );
+#  else
+    if ( ts == Qt::LocalTime )
+	t = localtime( &ltime );
+    else
+	t = gmtime( &ltime );
+#  endif // QT_THREAD_SUPPORT && _POSIX_THREAD_SAFE_FUNCTIONS
+
+    ct->ds = (uint)( MSECS_PER_HOUR * t->tm_hour + MSECS_PER_MIN * t->tm_min +
+		     1000 * t->tm_sec + tv.tv_usec / 1000 );
+#else
+    time_t ltime; // no millisecond resolution
+    ::time( &ltime );
+    tm *t;
+    if ( ts == Qt::LocalTime )
+	localtime( &ltime );
+    else
+	gmtime( &ltime );
+    ct->ds = (uint) ( MSECS_PER_HOUR * t->tm_hour + MSECS_PER_MIN * t->tm_min +
+		      1000 * t->tm_sec );
+#endif
+    // 00:00.00 to 00:00.59.999 is considered as "midnight or right after"
+    return ct->ds < (uint) MSECS_PER_MIN;
+}
+
+/*!
+    \overload
+
+    Returns TRUE if the specified time is valid; otherwise returns
+    FALSE.
+
+    The time is valid if \a h is in the range 0..23, \a m and \a s are
+    in the range 0..59, and \a ms is in the range 0..999.
+
+    Example:
+    \code
+    QTime::isValid(21, 10, 30); // returns TRUE
+    QTime::isValid(22, 5,  62); // returns FALSE
+    \endcode
+*/
+
+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:
+
+    \code
+    QTime t;
+    t.start();
+    some_lengthy_task();
+    qDebug( "Time elapsed: %d ms", t.elapsed() );
+    \endcode
+
+    \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 then 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 qdatetime.h
+    \reentrant
+    \brief The QDateTime class provides date and time functions.
+
+    \ingroup time
+    \mainclass
+
+    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(), which 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, which 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
+    which is 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
+    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, and secsTo() returns the
+    number of seconds between two datetimes.
+
+    The range of a datetime object is constrained to the ranges of the
+    QDate and QTime objects which it embodies.
+
+    \sa QDate QTime QDateTimeEdit
+*/
+
+
+/*!
+    \fn QDateTime::QDateTime()
+
+    Constructs a null datetime (i.e. null date and null time). A null
+    datetime is invalid, since the date is invalid.
+
+    \sa isValid()
+*/
+
+
+/*!
+    Constructs a datetime with date \a date and null (but valid) time
+    (00:00:00.000).
+*/
+
+QDateTime::QDateTime( const QDate &date )
+    : d(date)
+{
+}
+
+/*!
+    Constructs a datetime with date \a date and time \a time.
+*/
+
+QDateTime::QDateTime( const QDate &date, const QTime &time )
+    : d(date), t(time)
+{
+}
+
+
+/*!
+    \fn bool QDateTime::isNull() const
+
+    Returns TRUE if both the date and the time are null; otherwise
+    returns FALSE. A null datetime is invalid.
+
+    \sa QDate::isNull(), QTime::isNull()
+*/
+
+/*!
+    \fn bool QDateTime::isValid() const
+
+    Returns TRUE if both the date and the time are valid; otherwise
+    returns FALSE.
+
+    \sa QDate::isValid(), QTime::isValid()
+*/
+
+/*!
+    \fn QDate QDateTime::date() const
+
+    Returns the date part of the datetime.
+
+    \sa setDate(), time()
+*/
+
+/*!
+    \fn QTime QDateTime::time() const
+
+    Returns the time part of the datetime.
+
+    \sa setTime(), date()
+*/
+
+/*!
+    \fn void QDateTime::setDate( const QDate &date )
+
+    Sets the date part of this datetime to \a date.
+
+    \sa date(), setTime()
+*/
+
+/*!
+    \fn void QDateTime::setTime( const QTime &time )
+
+    Sets the time part of this datetime to \a time.
+
+    \sa time(), setDate()
+*/
+
+
+/*!
+    Returns the datetime as the number of seconds that have passed
+    since 1970-01-01T00:00:00, Coordinated Universal Time (UTC).
+
+    On systems that do not support timezones, this function will
+    behave as if local time were UTC.
+
+    \sa setTime_t()
+*/
+
+uint QDateTime::toTime_t() const
+{
+    tm brokenDown;
+    brokenDown.tm_sec = t.second();
+    brokenDown.tm_min = t.minute();
+    brokenDown.tm_hour = t.hour();
+    brokenDown.tm_mday = d.day();
+    brokenDown.tm_mon = d.month() - 1;
+    brokenDown.tm_year = d.year() - 1900;
+    brokenDown.tm_isdst = -1;
+    int secsSince1Jan1970UTC = (int) mktime( &brokenDown );
+    if ( secsSince1Jan1970UTC < -1 )
+	secsSince1Jan1970UTC = -1;
+    return (uint) secsSince1Jan1970UTC;
+}
+
+/*!
+    \overload
+
+    Convenience function that sets the date and time to local time
+    based on the given UTC time.
+*/
+
+void QDateTime::setTime_t( uint secsSince1Jan1970UTC )
+{
+    setTime_t( secsSince1Jan1970UTC, Qt::LocalTime );
+}
+
+/*!
+    Sets the date and time to \a ts time (\c Qt::LocalTime or \c
+    Qt::UTC) given the number of seconds that have passed since
+    1970-01-01T00:00:00, Coordinated Universal Time (UTC). On systems
+    that do not support timezones this function will behave as if
+    local time were UTC.
+
+    On Windows, only a subset of \a secsSince1Jan1970UTC values are
+    supported, as Windows starts counting from 1980.
+
+    \sa toTime_t()
+*/
+void QDateTime::setTime_t( uint secsSince1Jan1970UTC, Qt::TimeSpec ts )
+{
+    time_t tmp = (time_t) secsSince1Jan1970UTC;
+    tm *brokenDown = 0;
+
+#if defined(Q_OS_UNIX) && defined(QT_THREAD_SUPPORT) && defined(_POSIX_THREAD_SAFE_FUNCTIONS)
+    // posix compliant system
+    // use the reentrant versions of localtime() and gmtime() where available
+    tm res;
+    if ( ts == Qt::LocalTime )
+	brokenDown = localtime_r( &tmp, &res );
+    if ( !brokenDown ) {
+	brokenDown = gmtime_r( &tmp, &res );
+	if ( !brokenDown ) {
+	    d.jd = QDate::gregorianToJulian( 1970, 1, 1 );
+	    t.ds = 0;
+	    return;
+	}
+    }
+#else
+    if ( ts == Qt::LocalTime )
+	brokenDown = localtime( &tmp );
+    if ( !brokenDown ) {
+	brokenDown = gmtime( &tmp );
+	if ( !brokenDown ) {
+	    d.jd = QDate::gregorianToJulian( 1970, 1, 1 );
+	    t.ds = 0;
+	    return;
+	}
+    }
+#endif
+
+    d.jd = QDate::gregorianToJulian( brokenDown->tm_year + 1900,
+				     brokenDown->tm_mon + 1,
+				     brokenDown->tm_mday );
+    t.ds = MSECS_PER_HOUR * brokenDown->tm_hour +
+	   MSECS_PER_MIN * brokenDown->tm_min +
+	   1000 * brokenDown->tm_sec;
+}
+#ifndef QT_NO_DATESTRING
+#ifndef QT_NO_SPRINTF
+/*!
+    \overload
+
+    Returns the datetime as a string. The \a f parameter determines
+    the format of the string.
+
+    If \a f is \c Qt::TextDate, the string format is "Wed May 20
+    03:40:13 1998" (using QDate::shortDayName(), QDate::shortMonthName(),
+    and QTime::toString() to generate the string, so the day and month
+    names will have localized names).
+
+    If \a f is \c Qt::ISODate, the string format corresponds to the
+    ISO 8601 extended specification for representations of dates and
+    times, which is YYYY-MM-DDTHH:MM:SS.
+
+    If \a f is \c Qt::LocalDate, the string format depends on the
+    locale settings of the system.
+
+    If the format \a f is invalid or the datetime is invalid, toString()
+    returns a null string.
+
+    \sa QDate::toString() QTime::toString()
+*/
+
+QString QDateTime::toString( Qt::DateFormat f ) const
+{
+    if ( !isValid() )
+	return QString::null;
+
+    if ( f == Qt::ISODate ) {
+	return d.toString( Qt::ISODate ) + "T" + t.toString( Qt::ISODate );
+    }
+#ifndef QT_NO_TEXTDATE
+    else if ( f == Qt::TextDate ) {
+#ifndef Q_WS_WIN
+	QString buf = d.shortDayName( d.dayOfWeek() );
+	buf += ' ';
+	buf += d.shortMonthName( d.month() );
+	buf += ' ';
+	buf += QString().setNum( d.day() );
+	buf += ' ';
+#else
+	QString buf;
+	QString winstr;
+	QT_WA( {
+	    TCHAR out[255];
+	    GetLocaleInfo( LOCALE_USER_DEFAULT, LOCALE_ILDATE, out, 255 );
+	    winstr = QString::fromUcs2( (ushort*)out );
+	} , {
+	    char out[255];
+	    GetLocaleInfoA( LOCALE_USER_DEFAULT, LOCALE_ILDATE, (char*)&out, 255 );
+	    winstr = QString::fromLocal8Bit( out );
+	} );
+	switch ( winstr.toInt() ) {
+	case 1:
+	    buf = d.shortDayName( d.dayOfWeek() ) + " " + QString().setNum( d.day() ) + ". " + d.shortMonthName( d.month() ) + " ";
+	    break;
+	default:
+	    buf = d.shortDayName( d.dayOfWeek() ) + " " + d.shortMonthName( d.month() ) + " " + QString().setNum( d.day() ) + " ";
+	    break;
+	}
+#endif
+	buf += t.toString();
+	buf += ' ';
+	buf += QString().setNum( d.year() );
+	return buf;
+    }
+#endif
+    else if ( f == Qt::LocalDate ) {
+	return d.toString( Qt::LocalDate ) + " " + t.toString( Qt::LocalDate );
+    }
+    return QString::null;
+}
+#endif
+
+/*!
+    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 (1-31)
+    \row \i dd \i the day as number with a leading zero (01-31)
+    \row \i ddd
+	    \i the abbreviated localized day name (e.g. 'Mon'..'Sun').
+	    Uses QDate::shortDayName().
+    \row \i dddd
+	    \i the long localized day name (e.g. 'Monday'..'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'..'Dec').
+	    Uses QDate::shortMonthName().
+    \row \i MMMM
+	    \i the long localized month name (e.g. 'January'..'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 (1752-8000)
+    \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..23 or 1..12 if AM/PM display)
+    \row \i hh
+	    \i the hour with a leading zero (00..23 or 01..12 if AM/PM display)
+    \row \i m \i the minute without a leading zero (0..59)
+    \row \i mm \i the minute with a leading zero (00..59)
+    \row \i s \i the second whithout a leading zero (0..59)
+    \row \i ss \i the second whith a leading zero (00..59)
+    \row \i z \i the milliseconds without leading zeroes (0..999)
+    \row \i zzz \i the milliseconds with leading zeroes (000..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.
+
+    Example format strings (assumed that the QDateTime is
+    21<small><sup>st</sup></small> May 2001 14:13:09)
+
+    \table
+    \header \i Format \i Result
+    \row \i dd.MM.yyyy	    \i11 21.05.2001
+    \row \i ddd MMMM d yy   \i11 Tue May 21 01
+    \row \i hh:mm:ss.zzz    \i11 14:13:09.042
+    \row \i h:m:s ap	    \i11 2:13:9 pm
+    \endtable
+
+    If the datetime is an invalid datetime, then QString::null will be returned.
+
+    \sa QDate::toString() QTime::toString()
+*/
+QString QDateTime::toString( const QString& format ) const
+{
+    return fmtDateTime( format, &t, &d );
+}
+#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.addDays(ndays), t );
+}
+
+/*!
+    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.addMonths(nmonths), t );
+}
+
+/*!
+    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.addYears(nyears), t );
+}
+
+/*!
+    Returns a QDateTime object containing a datetime \a nsecs seconds
+    later than the datetime of this object (or earlier if \a nsecs is
+    negative).
+
+    \sa secsTo(), addDays(), addMonths(), addYears()
+*/
+
+QDateTime QDateTime::addSecs( int nsecs ) const
+{
+    uint dd = d.jd;
+    int  tt = t.ds;
+    int  sign = 1;
+    if ( nsecs < 0 ) {
+	nsecs = -nsecs;
+	sign = -1;
+    }
+    if ( nsecs >= (int)SECS_PER_DAY ) {
+	dd += sign*(nsecs/SECS_PER_DAY);
+	nsecs %= SECS_PER_DAY;
+    }
+    tt += sign*nsecs*1000;
+    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;
+    }
+    QDateTime ret;
+    ret.t.ds = tt;
+    ret.d.jd = dd;
+    return ret;
+}
+
+/*!
+    Returns the number of days from this datetime to \a dt (which is
+    negative if \a dt is earlier than this datetime).
+
+    \sa addDays(), secsTo()
+*/
+
+int QDateTime::daysTo( const QDateTime &dt ) const
+{
+    return d.daysTo( dt.d );
+}
+
+/*!
+    Returns the number of seconds from this datetime to \a dt (which
+    is negative if \a dt is earlier than this datetime).
+
+    Example:
+    \code
+    QDateTime dt = QDateTime::currentDateTime();
+    QDateTime xmas( QDate(dt.date().year(),12,24), QTime(17,00) );
+    qDebug( "There are %d seconds to Christmas", dt.secsTo(xmas) );
+    \endcode
+
+    \sa addSecs(), daysTo(), QTime::secsTo()
+*/
+
+int QDateTime::secsTo( const QDateTime &dt ) const
+{
+    return t.secsTo(dt.t) + d.daysTo(dt.d)*SECS_PER_DAY;
+}
+
+
+/*!
+    Returns TRUE if this datetime is equal to \a dt; otherwise returns FALSE.
+
+    \sa operator!=()
+*/
+
+bool QDateTime::operator==( const QDateTime &dt ) const
+{
+    return  t == dt.t && d == dt.d;
+}
+
+/*!
+    Returns TRUE if this datetime is different from \a dt; otherwise
+    returns FALSE.
+
+    \sa operator==()
+*/
+
+bool QDateTime::operator!=( const QDateTime &dt ) const
+{
+    return  t != dt.t || d != dt.d;
+}
+
+/*!
+    Returns TRUE if this datetime is earlier than \a dt; otherwise
+    returns FALSE.
+*/
+
+bool QDateTime::operator<( const QDateTime &dt ) const
+{
+    if ( d < dt.d )
+	return TRUE;
+    return d == dt.d ? t < dt.t : FALSE;
+}
+
+/*!
+    Returns TRUE if this datetime is earlier than or equal to \a dt;
+    otherwise returns FALSE.
+*/
+
+bool QDateTime::operator<=( const QDateTime &dt ) const
+{
+    if ( d < dt.d )
+	return TRUE;
+    return d == dt.d ? t <= dt.t : FALSE;
+}
+
+/*!
+    Returns TRUE if this datetime is later than \a dt; otherwise
+    returns FALSE.
+*/
+
+bool QDateTime::operator>( const QDateTime &dt ) const
+{
+    if ( d > dt.d )
+	return TRUE;
+    return d == dt.d ? t > dt.t : FALSE;
+}
+
+/*!
+    Returns TRUE if this datetime is later than or equal to \a dt;
+    otherwise returns FALSE.
+*/
+
+bool QDateTime::operator>=( const QDateTime &dt ) const
+{
+    if ( d > dt.d )
+	return TRUE;
+    return d == dt.d ? t >= dt.t : FALSE;
+}
+
+/*!
+    \overload
+
+    Returns the current datetime, as reported by the system clock.
+
+    \sa QDate::currentDate(), QTime::currentTime()
+*/
+
+QDateTime QDateTime::currentDateTime()
+{
+    return currentDateTime( Qt::LocalTime );
+}
+
+/*!
+  Returns the current datetime, as reported by the system clock, for the
+  TimeSpec \a ts. The default TimeSpec is LocalTime.
+
+  \sa QDate::currentDate(), QTime::currentTime(), Qt::TimeSpec
+*/
+
+QDateTime QDateTime::currentDateTime( Qt::TimeSpec ts )
+{
+    QDateTime dt;
+    QTime t;
+    dt.setDate( QDate::currentDate(ts) );
+    if ( QTime::currentTime(&t, ts) )         // midnight or right after?
+	dt.setDate( QDate::currentDate(ts) ); // fetch date again
+    dt.setTime( t );
+    return dt;
+}
+
+#ifndef QT_NO_DATESTRING
+/*!
+    Returns the QDateTime represented by the string \a s, using the
+    format \a f, or an invalid datetime if this is not possible.
+
+    Note for \c 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.
+
+    \warning Note that \c Qt::LocalDate cannot be used here.
+*/
+QDateTime QDateTime::fromString( const QString& s, Qt::DateFormat f )
+{
+    if ( ( s.isEmpty() ) || ( f == Qt::LocalDate ) ) {
+#if defined(QT_CHECK_RANGE)
+	qWarning( "QDateTime::fromString: Parameter out of range" );
+#endif
+	QDateTime dt;
+	dt.d.jd = 0;
+	return dt;
+    }
+    if ( f == Qt::ISODate ) {
+	return QDateTime( QDate::fromString( s.mid(0,10), Qt::ISODate ),
+			  QTime::fromString( s.mid(11), Qt::ISODate ) );
+    }
+#if !defined(QT_NO_REGEXP) && !defined(QT_NO_TEXTDATE)
+    else if ( f == Qt::TextDate ) {
+        const int firstSpace = s.find(' ');
+	QString monthName( s.mid( firstSpace + 1, 3 ) );
+	int month = -1;
+	// Assume that English monthnames are the default
+	for ( int i = 0; i < 12; ++i ) {
+	    if ( monthName == 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 defined(QT_CHECK_RANGE)
+	if ( month < 1 || month > 12 ) {
+	    qWarning( "QDateTime::fromString: Parameter out of range" );
+	    QDateTime dt;
+	    dt.d.jd = 0;
+	    return dt;
+	}
+#endif
+	int day = s.mid( firstSpace + 5, 2 ).simplifyWhiteSpace().toInt();
+	int year = s.right( 4 ).toInt();
+	QDate date( year, month, day );
+	QTime time;
+	int hour, minute, second;
+	int pivot = s.find( QRegExp(QString::fromLatin1("[0-9][0-9]:[0-9][0-9]:[0-9][0-9]")) );
+	if ( pivot != -1 ) {
+	    hour = s.mid( pivot, 2 ).toInt();
+	    minute = s.mid( pivot+3, 2 ).toInt();
+	    second = s.mid( pivot+6, 2 ).toInt();
+	    time.setHMS( hour, minute, second );
+	}
+	return QDateTime( date, time );
+    }
+#endif //QT_NO_REGEXP
+    return QDateTime();
+}
+#endif //QT_NO_DATESTRING
+
+
+/*****************************************************************************
+  Date/time stream functions
+ *****************************************************************************/
+
+#ifndef QT_NO_DATASTREAM
+/*!
+    \relates QDate
+
+    Writes the date, \a d, to the data stream, \a s.
+
+    \sa \link datastreamformat.html Format of the QDataStream operators \endlink
+*/
+
+QDataStream &operator<<( QDataStream &s, const QDate &d )
+{
+    return s << (Q_UINT32)(d.jd);
+}
+
+/*!
+    \relates QDate
+
+    Reads a date from the stream \a s into \a d.
+
+    \sa \link datastreamformat.html Format of the QDataStream operators \endlink
+*/
+
+QDataStream &operator>>( QDataStream &s, QDate &d )
+{
+    Q_UINT32 jd;
+    s >> jd;
+    d.jd = jd;
+    return s;
+}
+
+/*!
+    \relates QTime
+
+    Writes time \a t to the stream \a s.
+
+    \sa \link datastreamformat.html Format of the QDataStream operators \endlink
+*/
+
+QDataStream &operator<<( QDataStream &s, const QTime &t )
+{
+    return s << (Q_UINT32)(t.ds);
+}
+
+/*!
+    \relates QTime
+
+    Reads a time from the stream \a s into \a t.
+
+    \sa \link datastreamformat.html Format of the QDataStream operators \endlink
+*/
+
+QDataStream &operator>>( QDataStream &s, QTime &t )
+{
+    Q_UINT32 ds;
+    s >> ds;
+    t.ds = ds;
+    return s;
+}
+
+/*!
+    \relates QDateTime
+
+    Writes the datetime \a dt to the stream \a s.
+
+    \sa \link datastreamformat.html Format of the QDataStream operators \endlink
+*/
+
+QDataStream &operator<<( QDataStream &s, const QDateTime &dt )
+{
+    return s << dt.d << dt.t;
+}
+
+/*!
+    \relates QDateTime
+
+    Reads a datetime from the stream \a s into \a dt.
+
+    \sa \link datastreamformat.html Format of the QDataStream operators \endlink
+*/
+
+QDataStream &operator>>( QDataStream &s, QDateTime &dt )
+{
+    s >> dt.d >> dt.t;
+    return s;
+}
+#endif //QT_NO_DATASTREAM