The old code is just plain wrong for negative julian days. Replaced
with plain math from The Calendar FAQ [1], which is correct for all
julian days, provided you use mathematical integer division (round to
negative infinity) rather than c++11 integer division (round to zero).
[1] http://www.tondering.dk/claus/cal/julperiod.php
While the conversion code works for up to around JD +/- (2^63/4), we
only use an int for the year in the API, so this patch limits minJd()
and maxJd() to 1 Jan (2^31) BC and 31 Dec (2^31-1) AD, respectively.
Note that while the new conversion code looks like it would be more
expensive than the old, gcc will in fact be able to optimize it to be
slightly faster (probably because x86 hardware implements round to
negative infinity, and so GCC manages to optimize floordiv to a single
instruction, compared to the three instuctions needed for operator/).
In the following test application, run with a release mode Qt and
redirecting stderr to /dev/null, I measured an improvement from
6.81s +/- 0.08s to 6.26s +/- 0.16s user time over five runs on an
otherwise idle x86_64 system.
int main(int, char *[])
{
int year, month, day;
qint64 jd;
for (qint64 i = Q_INT64_C(-1048576) ; i < Q_INT64_C(1048576); ++i) {
QDate::fromJulianDay(i).getDate(&year, &month, &day);
jd = QDate(year, month, day).toJulianDay();
qDebug() << jd << year << month << day;
}
}
Change-Id: Ifd0dd01f0027f260401f7f9b4f1201d2b7a3b087
Reviewed-by: David Faure (KDE) <faure@kde.org>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Some statements could not be tested, such as default cases of switches
where all possible cases are already handled and some statements where
the system locale is used.
I also removed some statements that would never be reached and hence
will never be able to be covered by tests.
Change-Id: I8ea3071f66d942d986e65708732af6751d36b5e3
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Change copyrights and license headers from Nokia to Digia
Change-Id: If1cc974286d29fd01ec6c19dd4719a67f4c3f00e
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
In Qt 5, when streaming an invalid QDate using a QDataStream version
earlier than Qt_5_0, QDate.jd is written and read as 0, which is an
invalid julian day for Qt versions earlier than 5.0. For Qt 5.0
however, 0 is a valid julian day, so when comparing a deserialised
invalid date (read using a QDataStream version < Qt_5_0) against a
default-constructed invalid date, they won't compare equal when they
should.
Task-number: QTBUG-26989
Change-Id: Ia76df493471f3b068c7d7187be20e3178eff2cc7
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Qt 5.0 beta requires changing the default to the 5.0 API, disabling
the deprecated code. However, tests should test (and often do) the
compatibility API too, so turn it back on.
Task-number: QTBUG-25053
Change-Id: I8129c3ef3cb58541c95a32d083850d9e7f768927
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Add more test data, merging operator!= tests in with operator==
to take advantage of added data.
Change-Id: If0426a3d01b8800cb7363385dbf3bcb21af5ed8f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
QDate::toString(Qt::ISODate) lacks prefixed 0's on years below 1000.
The ISO 8601 standard dictates that this should be the case.
Task-number: QTBUG-16476
Change-Id: I7e73152bba0f5894bcbaa3f4418732b74ce86bc5
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Some test functions that only test QDate and QTime were in
tst_qdatetime.cpp. Upon moving these into tst_qdate.cpp and
tst_qtime.cpp, there were already some similar tests so I
consolidated them.
Change-Id: I5f8758bf8b4804ae9d3a482f49d21de9f7a1dc03
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Convert QDate to only use Gregorian calendar and not Julian calendar
before 1582. In future the Julian can be used via proper calendar
classes.
Change-Id: I547a3550332057a0ab1be616706630b6afaceffc
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Store the QDate Julian Day number as an qint64 instead of uint32 to
enable support for dates before 2 January 4713 BCE. This changes the
possible date range to be approx 2.5 Quadrillion BC to 2.5 Quadrillion
AD. A qint32 was not used as it only covers 5 million BCE to 5 million
CE which does include Geological or Astronomical time.
The effective supported date range is currently 4800 BCE to 1.4 million
CE due to restrictions in existing conversion formulas. The effective
range will be extended later with new formulas.
Change-Id: Ib4345369455b31d4edae8c933b7721e76414e914
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Check the validity of date/time before attempting to perform maths.
Change-Id: Ia6a2caf07c6c36f7d7fac713a77bc4eb456c6ed6
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
As in the past, to avoid rewriting various autotests that contain
line-number information, an extra blank line has been inserted at the
end of the license text to ensure that this commit does not change the
total number of lines in the license header.
Change-Id: I311e001373776812699d6efc045b5f742890c689
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
These comments were mostly empty or inaccurate. Appropriate naming of
tests and appropriate placement of tests within the directory tree
provide more reliable indicators of what is being tested.
Change-Id: Ib6bf373d9e79917e4ab1417ee5c1264a2c2d7027
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
qttest_p4.prf was added as a convenience for Qt's own autotests in Qt4.
It enables various crufty undocumented magic, of dubious value.
Stop using it, and explicitly enable the things from it which we want.
Change-Id: I7c1ffe9c8c294dbdc988e1582e580b1ed3f4593e
Reviewed-by: Jason McDonald <jason.mcdonald@nokia.com>
