U_CAPI int32_t U_EXPORT2
ucal_getDSTSavings(const UChar* zoneID, UErrorCode* ec) {
int32_t result = 0;
TimeZone* zone = _createTimeZone(zoneID, -1, ec);
if (U_SUCCESS(*ec)) {
SimpleTimeZone* stz = dynamic_cast<SimpleTimeZone*>(zone);
if (stz != NULL) {
result = stz->getDSTSavings();
} else {
// Since there is no getDSTSavings on TimeZone, we use a
// heuristic: Starting with the current time, march
// forwards for one year, looking for DST savings.
// Stepping by weeks is sufficient.
UDate d = Calendar::getNow();
for (int32_t i=0; i<53; ++i, d+=U_MILLIS_PER_DAY*7.0) {
int32_t raw, dst;
zone->getOffset(d, FALSE, raw, dst, *ec);
if (U_FAILURE(*ec)) {
break;
} else if (dst != 0) {
result = dst;
break;
}
}
}
}
delete zone;
return result;
}
// test new API for JDK 1.2 8/31 putback
void
TimeZoneRegressionTest::TestJDK12API()
{
// TimeZone *pst = TimeZone::createTimeZone("PST");
// TimeZone *cst1 = TimeZone::createTimeZone("CST");
UErrorCode ec = U_ZERO_ERROR;
//d,-28800,3,1,-1,120,w,9,-1,1,120,w,60
TimeZone *pst = new SimpleTimeZone(-28800*U_MILLIS_PER_SECOND,
"PST",
3,1,-1,120*U_MILLIS_PER_MINUTE,
SimpleTimeZone::WALL_TIME,
9,-1,1,120*U_MILLIS_PER_MINUTE,
SimpleTimeZone::WALL_TIME,
60*U_MILLIS_PER_MINUTE,ec);
//d,-21600,3,1,-1,120,w,9,-1,1,120,w,60
TimeZone *cst1 = new SimpleTimeZone(-21600*U_MILLIS_PER_SECOND,
"CST",
3,1,-1,120*U_MILLIS_PER_MINUTE,
SimpleTimeZone::WALL_TIME,
9,-1,1,120*U_MILLIS_PER_MINUTE,
SimpleTimeZone::WALL_TIME,
60*U_MILLIS_PER_MINUTE,ec);
if (U_FAILURE(ec)) {
errln("FAIL: SimpleTimeZone constructor");
return;
}
SimpleTimeZone *cst = dynamic_cast<SimpleTimeZone *>(cst1);
if(pst->hasSameRules(*cst)) {
errln("FAILURE: PST and CST have same rules");
}
UErrorCode status = U_ZERO_ERROR;
int32_t offset1 = pst->getOffset(1,
1997, UCAL_OCTOBER, 26, UCAL_SUNDAY, (2*60*60*1000), status);
failure(status, "getOffset() failed");
int32_t offset2 = cst->getOffset(1,
1997, UCAL_OCTOBER, 26, UCAL_SUNDAY, (2*60*60*1000), 31, status);
failure(status, "getOffset() failed");
if(offset1 == offset2)
errln("FAILURE: Sunday Oct. 26 1997 2:00 has same offset for PST and CST");
// verify error checking
pst->getOffset(1,
1997, UCAL_FIELD_COUNT+1, 26, UCAL_SUNDAY, (2*60*60*1000), status);
if(U_SUCCESS(status))
errln("FAILURE: getOffset() succeeded with -1 for month");
status = U_ZERO_ERROR;
cst->setDSTSavings(60*60*1000, status);
failure(status, "setDSTSavings() failed");
int32_t savings = cst->getDSTSavings();
if(savings != 60*60*1000) {
errln("setDSTSavings() failed");
}
delete pst;
delete cst;
}