UnicodeString&
TimeZone::getDisplayName(UBool daylight, EDisplayType style, const Locale& locale, UnicodeString& result) const
{
// SRL TODO: cache the SDF, just like java.
UErrorCode status = U_ZERO_ERROR;
SimpleDateFormat format(style == LONG ? "zzzz" : "z",locale,status);
if(!U_SUCCESS(status))
{
// *** SRL what do I do here?!!
return result.remove();
}
// Create a new SimpleTimeZone as a stand-in for this zone; the
// stand-in will have no DST, or all DST, but the same ID and offset,
// and hence the same display name.
// We don't cache these because they're small and cheap to create.
UnicodeString tempID;
SimpleTimeZone *tz = daylight ?
// For the pure-DST zone, we use JANUARY and DECEMBER
new SimpleTimeZone(getRawOffset(), getID(tempID),
UCAL_JANUARY , 1, 0, 0,
UCAL_DECEMBER , 31, 0, U_MILLIS_PER_DAY, status) :
new SimpleTimeZone(getRawOffset(), getID(tempID));
format.applyPattern(style == LONG ? "zzzz" : "z");
Calendar *myCalendar = (Calendar*)format.getCalendar();
myCalendar->setTimeZone(*tz); // copy
delete tz;
FieldPosition pos(FieldPosition::DONT_CARE);
return format.format(UDate(196262345678.), result, pos); // Must use a valid date here.
}
void
SimpleTimeZone::getOffsetFromLocal(UDate date, int32_t nonExistingTimeOpt, int32_t duplicatedTimeOpt,
int32_t& rawOffsetGMT, int32_t& savingsDST, UErrorCode& status) const {
if (U_FAILURE(status)) {
return;
}
rawOffsetGMT = getRawOffset();
int32_t year, month, dom, dow;
double day = uprv_floor(date / U_MILLIS_PER_DAY);
int32_t millis = (int32_t) (date - day * U_MILLIS_PER_DAY);
Grego::dayToFields(day, year, month, dom, dow);
savingsDST = getOffset(GregorianCalendar::AD, year, month, dom,
(uint8_t) dow, millis,
Grego::monthLength(year, month),
status) - rawOffsetGMT;
if (U_FAILURE(status)) {
return;
}
UBool recalc = FALSE;
// Now we need some adjustment
if (savingsDST > 0) {
if ((nonExistingTimeOpt & kStdDstMask) == kStandard
|| ((nonExistingTimeOpt & kStdDstMask) != kDaylight && (nonExistingTimeOpt & kFormerLatterMask) != kLatter)) {
date -= getDSTSavings();
recalc = TRUE;
}
} else {
if ((duplicatedTimeOpt & kStdDstMask) == kDaylight
|| ((duplicatedTimeOpt & kStdDstMask) != kStandard && (duplicatedTimeOpt & kFormerLatterMask) == kFormer)) {
date -= getDSTSavings();
recalc = TRUE;
}
}
if (recalc) {
day = uprv_floor(date / U_MILLIS_PER_DAY);
millis = (int32_t) (date - day * U_MILLIS_PER_DAY);
Grego::dayToFields(day, year, month, dom, dow);
savingsDST = getOffset(GregorianCalendar::AD, year, month, dom,
(uint8_t) dow, millis,
Grego::monthLength(year, month),
status) - rawOffsetGMT;
}
}
void TimeZone::getOffset(UDate date, UBool local, int32_t& rawOffset,
int32_t& dstOffset, UErrorCode& ec) const {
if (U_FAILURE(ec)) {
return;
}
rawOffset = getRawOffset();
if (!local) {
date += rawOffset; // now in local standard millis
}
// When local == TRUE, date might not be in local standard
// millis. getOffset taking 7 parameters used here assume
// the given time in day is local standard time.
// At STD->DST transition, there is a range of time which
// does not exist. When 'date' is in this time range
// (and local == TRUE), this method interprets the specified
// local time as DST. At DST->STD transition, there is a
// range of time which occurs twice. In this case, this
// method interprets the specified local time as STD.
// To support the behavior above, we need to call getOffset
// (with 7 args) twice when local == true and DST is
// detected in the initial call.
for (int32_t pass=0; ; ++pass) {
int32_t year, month, dom, dow;
double day = uprv_floor(date / U_MILLIS_PER_DAY);
int32_t millis = (int32_t) (date - day * U_MILLIS_PER_DAY);
Grego::dayToFields(day, year, month, dom, dow);
dstOffset = getOffset(GregorianCalendar::AD, year, month, dom,
(uint8_t) dow, millis,
Grego::monthLength(year, month),
ec) - rawOffset;
// Recompute if local==TRUE, dstOffset!=0.
if (pass!=0 || !local || dstOffset == 0) {
break;
}
// adjust to local standard millis
date -= dstOffset;
}
}
void
SimpleTimeZone::initTransitionRules(UErrorCode& status) {
if (U_FAILURE(status)) {
return;
}
if (transitionRulesInitialized) {
return;
}
deleteTransitionRules();
UnicodeString tzid;
getID(tzid);
if (useDaylight) {
DateTimeRule* dtRule;
DateTimeRule::TimeRuleType timeRuleType;
UDate firstStdStart, firstDstStart;
// Create a TimeZoneRule for daylight saving time
timeRuleType = (startTimeMode == STANDARD_TIME) ? DateTimeRule::STANDARD_TIME :
((startTimeMode == UTC_TIME) ? DateTimeRule::UTC_TIME : DateTimeRule::WALL_TIME);
switch (startMode) {
case DOM_MODE:
dtRule = new DateTimeRule(startMonth, startDay, startTime, timeRuleType);
break;
case DOW_IN_MONTH_MODE:
dtRule = new DateTimeRule(startMonth, startDay, startDayOfWeek, startTime, timeRuleType);
break;
case DOW_GE_DOM_MODE:
dtRule = new DateTimeRule(startMonth, startDay, startDayOfWeek, true, startTime, timeRuleType);
break;
case DOW_LE_DOM_MODE:
dtRule = new DateTimeRule(startMonth, startDay, startDayOfWeek, false, startTime, timeRuleType);
break;
default:
status = U_INVALID_STATE_ERROR;
return;
}
// Check for Null pointer
if (dtRule == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
// For now, use ID + "(DST)" as the name
dstRule = new AnnualTimeZoneRule(tzid+UnicodeString(DST_STR), getRawOffset(), getDSTSavings(),
dtRule, startYear, AnnualTimeZoneRule::MAX_YEAR);
// Check for Null pointer
if (dstRule == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
deleteTransitionRules();
return;
}
// Calculate the first DST start time
dstRule->getFirstStart(getRawOffset(), 0, firstDstStart);
// Create a TimeZoneRule for standard time
timeRuleType = (endTimeMode == STANDARD_TIME) ? DateTimeRule::STANDARD_TIME :
((endTimeMode == UTC_TIME) ? DateTimeRule::UTC_TIME : DateTimeRule::WALL_TIME);
switch (endMode) {
case DOM_MODE:
dtRule = new DateTimeRule(endMonth, endDay, endTime, timeRuleType);
break;
case DOW_IN_MONTH_MODE:
dtRule = new DateTimeRule(endMonth, endDay, endDayOfWeek, endTime, timeRuleType);
break;
case DOW_GE_DOM_MODE:
dtRule = new DateTimeRule(endMonth, endDay, endDayOfWeek, true, endTime, timeRuleType);
break;
case DOW_LE_DOM_MODE:
dtRule = new DateTimeRule(endMonth, endDay, endDayOfWeek, false, endTime, timeRuleType);
break;
}
// Check for Null pointer
if (dtRule == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
deleteTransitionRules();
return;
}
// For now, use ID + "(STD)" as the name
stdRule = new AnnualTimeZoneRule(tzid+UnicodeString(STD_STR), getRawOffset(), 0,
dtRule, startYear, AnnualTimeZoneRule::MAX_YEAR);
//Check for Null pointer
if (stdRule == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
deleteTransitionRules();
return;
}
// Calculate the first STD start time
stdRule->getFirstStart(getRawOffset(), dstRule->getDSTSavings(), firstStdStart);
// Create a TimeZoneRule for initial time
if (firstStdStart < firstDstStart) {
initialRule = new InitialTimeZoneRule(tzid+UnicodeString(DST_STR), getRawOffset(), dstRule->getDSTSavings());
firstTransition = new TimeZoneTransition(firstStdStart, *initialRule, *stdRule);
} else {
initialRule = new InitialTimeZoneRule(tzid+UnicodeString(STD_STR), getRawOffset(), 0);
firstTransition = new TimeZoneTransition(firstDstStart, *initialRule, *dstRule);
}
// Check for null pointers.
if (initialRule == NULL || firstTransition == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
deleteTransitionRules();
return;
}
} else {
// Create a TimeZoneRule for initial time
initialRule = new InitialTimeZoneRule(tzid, getRawOffset(), 0);
// Check for null pointer.
if (initialRule == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
deleteTransitionRules();
return;
}
}
transitionRulesInitialized = TRUE;
}
UBool
TimeZone::hasSameRules(const TimeZone& other) const
{
return (getRawOffset() == other.getRawOffset() &&
useDaylightTime() == other.useDaylightTime());
}
