Google Git
Sign in
android / platform / external / qt / 9adc00701674d3638e8a2d68e450a6b1a66f0294 / . / Mac-4.7.4 / src / corelib / tools / qdatetime.cpp
blob: 726b9aa44c60cd5ab2bb7a57b788b3bf65add94f [file] [log] [blame]
/****************************************************************************
**
** 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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();
int tzoffset = 0;
if (tz.length() > 3) {
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;
}
return QDateTime(date, time, Qt::UTC).addSecs(-tzoffset).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);
}
#endif // QT_BOOTSTRAPPED
QT_END_NAMESPACE