diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/corelib/tools/qtimezoneprivate_win.cpp | 56 |
1 files changed, 39 insertions, 17 deletions
diff --git a/src/corelib/tools/qtimezoneprivate_win.cpp b/src/corelib/tools/qtimezoneprivate_win.cpp index 8954f5e685..ad4860e961 100644 --- a/src/corelib/tools/qtimezoneprivate_win.cpp +++ b/src/corelib/tools/qtimezoneprivate_win.cpp @@ -259,6 +259,22 @@ static DYNAMIC_TIME_ZONE_INFORMATION dynamicInfoForId(const QByteArray &windowsI } return dtzInfo; } + +static QWinTimeZonePrivate::QWinTransitionRule +readDynamicRule(DYNAMIC_TIME_ZONE_INFORMATION &dtzi, int year, bool *ok) +{ + TIME_ZONE_INFORMATION tzi; + QWinTimeZonePrivate::QWinTransitionRule rule; + *ok = GetTimeZoneInformationForYear(year, &dtzi, &tzi); + if (*ok) { + rule.startYear = 0; + rule.standardTimeBias = tzi.Bias + tzi.StandardBias; + rule.daylightTimeBias = tzi.Bias + tzi.DaylightBias - rule.standardTimeBias; + rule.standardTimeRule = tzi.StandardDate; + rule.daylightTimeRule = tzi.DaylightDate; + } + return rule; +} #endif // QT_USE_REGISTRY_TIMEZONE static QList<QByteArray> availableWindowsIds() @@ -484,16 +500,17 @@ void QWinTimeZonePrivate::init(const QByteArray &ianaId) QWinTransitionRule rule = readRegistryRule(dynamicKey, (LPCWSTR)QString::number(year).utf16(), &ruleOk); - rule.startYear = year; - if (ruleOk) + if (ruleOk) { + rule.startYear = m_tranRules.isEmpty() ? MIN_YEAR : year; m_tranRules.append(rule); + } } RegCloseKey(dynamicKey); } else { // No dynamic data so use the base data bool ruleOk; QWinTransitionRule rule = readRegistryRule(baseKey, L"TZI", &ruleOk); - rule.startYear = 1970; + rule.startYear = MIN_YEAR; if (ruleOk) m_tranRules.append(rule); } @@ -510,20 +527,25 @@ void QWinTimeZonePrivate::init(const QByteArray &ianaId) DWORD firstYear = 0; DWORD lastYear = 0; DYNAMIC_TIME_ZONE_INFORMATION dtzi = dynamicInfoForId(m_windowsId); - GetDynamicTimeZoneInformationEffectiveYears(&dtzi, &firstYear, &lastYear); - // If there is no dynamic information, you can still query for - // year 0, which helps simplifying following part - for (DWORD year = firstYear; year <= lastYear; ++year) { - TIME_ZONE_INFORMATION tzi; - if (!GetTimeZoneInformationForYear(year, &dtzi, &tzi)) - continue; - QWinTransitionRule rule; - rule.standardTimeBias = tzi.Bias + tzi.StandardBias; - rule.daylightTimeBias = tzi.Bias + tzi.DaylightBias - rule.standardTimeBias; - rule.standardTimeRule = tzi.StandardDate; - rule.daylightTimeRule = tzi.DaylightDate; - rule.startYear = year; - m_tranRules.append(rule); + if (GetDynamicTimeZoneInformationEffectiveYears(&dtzi, &firstYear, &lastYear) + == ERROR_SUCCESS && firstYear < lastYear) { + for (DWORD year = firstYear; year <= lastYear; ++year) { + bool ok = false; + QWinTransitionRule rule = readDynamicRule(dtzi, year, &ok); + if (ok) { + rule.startYear = m_tranRules.isEmpty() ? MIN_YEAR : year; + m_tranRules.append(rule); + } + } + } else { + // At least try to get the non-dynamic data: + dtzi.DynamicDaylightTimeDisabled = false; + bool ok = false; + QWinTransitionRule rule = readDynamicRule(dtzi, 1970, &ok); + if (ok) { + rule.startYear = MIN_YEAR; + m_tranRules.append(rule); + } } } #endif // QT_USE_REGISTRY_TIMEZONE |