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Fix Qt date interfaces for times before 1970

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This seems to work around the crazy QDateTime::fromTime_t() problem in Qt.

It is *very* lightly tested. In fact, the only test is that "test0.xml"
change that is part of this patch.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Linus Torvalds 2016-04-28 16:31:37 -07:00 • committed by Dirk Hohndel
parent 84166a4ee7
commit 56ed3f1c61
4 changed files with 13 additions and 14 deletions
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2
core/qthelper.cpp
View file

@ -950,7 +950,7 @@ QString get_trip_date_string(timestamp_t when, int nr, bool getday)
{
struct tm tm;
utc_mkdate(when, &tm);
QDateTime localTime = QDateTime::fromTime_t(when);
QDateTime localTime = QDateTime::fromMSecsSinceEpoch(1000*when,Qt::UTC);
localTime.setTimeSpec(Qt::UTC);
QString ret ;

17
core/subsurface-qt/DiveObjectHelper.cpp
View file

@ -73,7 +73,7 @@ int DiveObjectHelper::id() const
QString DiveObjectHelper::date() const
{
QDateTime localTime = QDateTime::fromTime_t(m_dive->when - gettimezoneoffset(m_dive->when));
QDateTime localTime = QDateTime::fromMSecsSinceEpoch(1000*m_dive->when, Qt::UTC);
localTime.setTimeSpec(Qt::UTC);
return localTime.date().toString(prefs.date_format);
}
@ -85,7 +85,7 @@ timestamp_t DiveObjectHelper::timestamp() const
QString DiveObjectHelper::time() const
{
QDateTime localTime = QDateTime::fromTime_t(m_dive->when - gettimezoneoffset(m_dive->when));
QDateTime localTime = QDateTime::fromMSecsSinceEpoch(1000*m_dive->when, Qt::UTC);
localTime.setTimeSpec(Qt::UTC);
return localTime.time().toString(prefs.time_format);
}
@ -288,13 +288,12 @@ QString DiveObjectHelper::tripMeta() const
QString title(dt->location);
if (title.isEmpty()) {
// so use the date range
timestamp_t firstTime = dt->when - gettimezoneoffset(dt->when);
QString firstMonth = QDateTime::fromTime_t(firstTime).toString("MMM");
QString firstYear = QDateTime::fromTime_t(firstTime).toString("yyyy");
struct dive *lastDive = dt->dives;
timestamp_t lastTime = lastDive->when - gettimezoneoffset(lastDive->when);
QString lastMonth = QDateTime::fromTime_t(lastTime).toString("MMM");
QString lastYear = QDateTime::fromTime_t(lastTime).toString("yyyy");
QDateTime firstTime = QDateTime::fromMSecsSinceEpoch(1000*dt->when, Qt::UTC);
QString firstMonth = firstTime.toString("MMM");
QString firstYear = firstTime.toString("yyyy");
QDateTime lastTime = QDateTime::fromMSecsSinceEpoch(1000*dt->dives->when, Qt::UTC);
QString lastMonth = lastTime.toString("MMM");
QString lastYear = lastTime.toString("yyyy");
if (lastMonth == firstMonth && lastYear == firstYear)
title = firstMonth + " " + firstYear;
else if (lastMonth != firstMonth && lastYear == firstYear)

6
desktop-widgets/maintab.cpp
View file

@ -493,7 +493,7 @@ void MainTab::updateDiveInfo(bool clear)
// Subsurface always uses "local time" as in "whatever was the local time at the location"
// so all time stamps have no time zone information and are in UTC
QDateTime localTime = QDateTime::fromTime_t(displayed_dive.when - gettimezoneoffset(displayed_dive.when));
QDateTime localTime = QDateTime::fromMSecsSinceEpoch(1000*displayed_dive.when, Qt::UTC);
localTime.setTimeSpec(Qt::UTC);
ui.dateEdit->setDate(localTime.date());
ui.timeEdit->setTime(localTime.time());
@ -1284,7 +1284,7 @@ void MainTab::on_dateEdit_dateChanged(const QDate &date)
if (editMode == IGNORE || acceptingEdit == true)
return;
markChangedWidget(ui.dateEdit);
QDateTime dateTime = QDateTime::fromTime_t(displayed_dive.when - gettimezoneoffset(displayed_dive.when));
QDateTime dateTime = QDateTime::fromMSecsSinceEpoch(1000*displayed_dive.when, Qt::UTC);
dateTime.setTimeSpec(Qt::UTC);
dateTime.setDate(date);
DivePlannerPointsModel::instance()->getDiveplan().when = displayed_dive.when = dateTime.toTime_t();
@ -1296,7 +1296,7 @@ void MainTab::on_timeEdit_timeChanged(const QTime &time)
if (editMode == IGNORE || acceptingEdit == true)
return;
markChangedWidget(ui.timeEdit);
QDateTime dateTime = QDateTime::fromTime_t(displayed_dive.when - gettimezoneoffset(displayed_dive.when));
QDateTime dateTime = QDateTime::fromMSecsSinceEpoch(1000*displayed_dive.when, Qt::UTC);
dateTime.setTimeSpec(Qt::UTC);
dateTime.setTime(time);
DivePlannerPointsModel::instance()->getDiveplan().when = displayed_dive.when = dateTime.toTime_t();

2
dives/test0.xml
View file

@ -1,6 +1,6 @@
<dives>
<program name='subsurface' version='1'></program>
<dive number='0' date='2011-01-01' time='07:00:00' duration='30:00 min'>
<dive number='0' date='1968-01-01' time='07:00:00' duration='30:00 min'>
<depth max='30.00 m' mean='15.00 m' />
</dive>
</dives>