From ced34cb3d5805f1fbaf3b275714a1a5f3585900c Mon Sep 17 00:00:00 2001 From: Edward Welbourne Date: Mon, 1 Oct 2018 20:01:54 +0200 Subject: QDateTimeParser: avoid using an invalid hour by default When a time-zone does a spring-forward, skipping an hour (either to start DST or to move its standard time), there's an hour that doesn't exist on the day in question. That hour can be the first hour of the day, in which case using 0:0 as the default time is broken. So catch this case and use the first time that day that makes sense. Fixes: QTBUG-70823 Change-Id: I23dae9320a3cdd2c988841a7db1b111edb945730 Reviewed-by: Thiago Macieira --- src/corelib/tools/qdatetimeparser.cpp | 29 +++++++++++++++++++--- .../auto/corelib/tools/qdatetime/tst_qdatetime.cpp | 8 ++++++ 2 files changed, 33 insertions(+), 4 deletions(-) diff --git a/src/corelib/tools/qdatetimeparser.cpp b/src/corelib/tools/qdatetimeparser.cpp index 18c44c3a17..e6afd510fd 100644 --- a/src/corelib/tools/qdatetimeparser.cpp +++ b/src/corelib/tools/qdatetimeparser.cpp @@ -1341,12 +1341,33 @@ QDateTimeParser::scanString(const QDateTime &defaultValue, const QDate date(year, month, day); const QTime time(hour, minute, second, msec); - return StateNode( + const QDateTime when = #if QT_CONFIG(timezone) - tspec == Qt::TimeZone ? QDateTime(date, time, timeZone) : + tspec == Qt::TimeZone ? QDateTime(date, time, timeZone) : #endif - QDateTime(date, time, tspec, zoneOffset), - state, padding, conflicts); + QDateTime(date, time, tspec, zoneOffset); + + // If hour wasn't specified, check the default we're using exists on the + // given date (which might be a spring-forward, skipping an hour). + if (parserType == QVariant::DateTime && !(isSet & HourSectionMask) && !when.isValid()) { + qint64 msecs = when.toMSecsSinceEpoch(); + // Fortunately, that gets a useful answer ... + const QDateTime replace = +#if QT_CONFIG(timezone) + tspec == Qt::TimeZone + ? QDateTime::fromMSecsSinceEpoch(msecs, timeZone) : +#endif + QDateTime::fromMSecsSinceEpoch(msecs, tspec, zoneOffset); + const QTime tick = replace.time(); + if (replace.date() == date + && (!(isSet & MinuteSection) || tick.minute() == minute) + && (!(isSet & SecondSection) || tick.second() == second) + && (!(isSet & MSecSection) || tick.msec() == msec)) { + return StateNode(replace, state, padding, conflicts); + } + } + + return StateNode(when, state, padding, conflicts); } /*! diff --git a/tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp b/tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp index d460beafde..943805e228 100644 --- a/tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp +++ b/tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp @@ -2390,6 +2390,14 @@ void tst_QDateTime::fromStringStringFormat_data() QTest::newRow("data16") << QString("2005-06-28T07:57:30.001Z") << QString("yyyy-MM-ddThh:mm:ss.zt") << QDateTime(QDate(2005, 06, 28), QTime(07, 57, 30, 1), Qt::UTC); +#if QT_CONFIG(timezone) + QTimeZone southBrazil("America/Sao_Paulo"); + if (southBrazil.isValid()) { + QTest::newRow("spring-forward-midnight") + << QString("2008-10-19 23:45.678 America/Sao_Paulo") << QString("yyyy-MM-dd mm:ss.zzz t") + << QDateTime(QDate(2008, 10, 19), QTime(1, 23, 45, 678), southBrazil); + } +#endif QTest::newRow("late") << QString("9999-12-31T23:59:59.999Z") << QString("yyyy-MM-ddThh:mm:ss.zZ") << QDateTime(QDate(9999, 12, 31), QTime(23, 59, 59, 999)); -- cgit v1.2.3