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Skip QTimeZone::isTimeZoneIdAvailable()'s validity check on Unix

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[ChangeLog][Corelib][QTimeZone] On Unix (other than macOS and
Android), the TZ-DB backend has long accepted any well-formed POSIX
zone description as a time-zone ID. This is now reflected in
QTimeZone::isTimeZoneIdAvailable(), which previously claimed not to
accept these IDs. However, avaliableTimeZoneIds() still does not
attempt to construct all possible POSIX descriptors to include in its
return.

Change-Id: I1df8df0a4acaca9e70d72f13200b4c31305732f3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Edward Welbourne 2023-03-17 16:45:27 +01:00
parent 41c561ddde
commit 092563a3d0
1 changed files with 8 additions and 2 deletions
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10
src/corelib/time/qtimezone.cpp
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@ -1347,12 +1347,18 @@ QTimeZone QTimeZone::utc()
bool QTimeZone::isTimeZoneIdAvailable(const QByteArray &ianaId)
{
#if defined(Q_OS_UNIX) && !(defined(Q_OS_ANDROID) || defined(Q_OS_DARWIN))
// Keep #if-ery consistent with selection of QTzTimeZonePrivate in
// newBackendTimeZone(). Skip the pre-check, as the TZ backend accepts POSIX
// zone IDs, which need not be valid IANA IDs.
#else
// isValidId is not strictly required, but faster to weed out invalid
// IDs as availableTimeZoneIds() may be slow
if (!QTimeZonePrivate::isValidId(ianaId))
return false;
return QUtcTimeZonePrivate().isTimeZoneIdAvailable(ianaId) ||
global_tz->backend->isTimeZoneIdAvailable(ianaId);
#endif
return QUtcTimeZonePrivate().isTimeZoneIdAvailable(ianaId)
|| global_tz->backend->isTimeZoneIdAvailable(ianaId);
}
static QList<QByteArray> set_union(const QList<QByteArray> &l1, const QList<QByteArray> &l2)