C++ TimeZoneTransition::getFrom方法代码示例

void
BasicTimeZone::getSimpleRulesNear(UDate date, InitialTimeZoneRule*& initial,
        AnnualTimeZoneRule*& std, AnnualTimeZoneRule*& dst, UErrorCode& status) /*const*/ {
    initial = NULL;
    std = NULL;
    dst = NULL;
    if (U_FAILURE(status)) {
        return;
    }
    int32_t initialRaw, initialDst;
    UnicodeString initialName;

    AnnualTimeZoneRule *ar1 = NULL;
    AnnualTimeZoneRule *ar2 = NULL;
    UnicodeString name;

    UBool avail;
    TimeZoneTransition tr;
    // Get the next transition
    avail = getNextTransition(date, FALSE, tr);
    if (avail) {
        tr.getFrom()->getName(initialName);
        initialRaw = tr.getFrom()->getRawOffset();
        initialDst = tr.getFrom()->getDSTSavings();

        // Check if the next transition is either DST->STD or STD->DST and
        // within roughly 1 year from the specified date
        UDate nextTransitionTime = tr.getTime();
        if (((tr.getFrom()->getDSTSavings() == 0 && tr.getTo()->getDSTSavings() != 0)
              || (tr.getFrom()->getDSTSavings() != 0 && tr.getTo()->getDSTSavings() == 0))
            && (date + MILLIS_PER_YEAR > nextTransitionTime)) {
 
            int32_t year, month, dom, dow, doy, mid;
            UDate d;

            // Get local wall time for the next transition time
            Grego::timeToFields(nextTransitionTime + initialRaw + initialDst,
                year, month, dom, dow, doy, mid);
            int32_t weekInMonth = Grego::dayOfWeekInMonth(year, month, dom);
            // Create DOW rule
            DateTimeRule *dtr = new DateTimeRule(month, weekInMonth, dow, mid, DateTimeRule::WALL_TIME);
            tr.getTo()->getName(name);

            // Note:  SimpleTimeZone does not support raw offset change.
            // So we always use raw offset of the given time for the rule,
            // even raw offset is changed.  This will result that the result
            // zone to return wrong offset after the transition.
            // When we encounter such case, we do not inspect next next
            // transition for another rule.
            ar1 = new AnnualTimeZoneRule(name, initialRaw, tr.getTo()->getDSTSavings(),
                dtr, year, AnnualTimeZoneRule::MAX_YEAR);

            if (tr.getTo()->getRawOffset() == initialRaw) {
                // Get the next next transition
                avail = getNextTransition(nextTransitionTime, FALSE, tr);
                if (avail) {
                    // Check if the next next transition is either DST->STD or STD->DST
                    // and within roughly 1 year from the next transition
                    if (((tr.getFrom()->getDSTSavings() == 0 && tr.getTo()->getDSTSavings() != 0)
                          || (tr.getFrom()->getDSTSavings() != 0 && tr.getTo()->getDSTSavings() == 0))
                         && nextTransitionTime + MILLIS_PER_YEAR > tr.getTime()) {

                        // Get local wall time for the next transition time
                        Grego::timeToFields(tr.getTime() + tr.getFrom()->getRawOffset() + tr.getFrom()->getDSTSavings(),
                            year, month, dom, dow, doy, mid);
                        weekInMonth = Grego::dayOfWeekInMonth(year, month, dom);
                        // Generate another DOW rule
                        dtr = new DateTimeRule(month, weekInMonth, dow, mid, DateTimeRule::WALL_TIME);
                        tr.getTo()->getName(name);
                        ar2 = new AnnualTimeZoneRule(name, tr.getTo()->getRawOffset(), tr.getTo()->getDSTSavings(),
                            dtr, year - 1, AnnualTimeZoneRule::MAX_YEAR);

                        // Make sure this rule can be applied to the specified date
                        avail = ar2->getPreviousStart(date, tr.getFrom()->getRawOffset(), tr.getFrom()->getDSTSavings(), TRUE, d);
                        if (!avail || d > date
                                || initialRaw != tr.getTo()->getRawOffset()
                                || initialDst != tr.getTo()->getDSTSavings()) {
                            // We cannot use this rule as the second transition rule
                            delete ar2;
                            ar2 = NULL;
                        }
                    }
                }
            }
            if (ar2 == NULL) {
                // Try previous transition
                avail = getPreviousTransition(date, TRUE, tr);
                if (avail) {
                    // Check if the previous transition is either DST->STD or STD->DST.
                    // The actual transition time does not matter here.
                    if ((tr.getFrom()->getDSTSavings() == 0 && tr.getTo()->getDSTSavings() != 0)
                        || (tr.getFrom()->getDSTSavings() != 0 && tr.getTo()->getDSTSavings() == 0)) {

                        // Generate another DOW rule
                        Grego::timeToFields(tr.getTime() + tr.getFrom()->getRawOffset() + tr.getFrom()->getDSTSavings(),
                            year, month, dom, dow, doy, mid);
                        weekInMonth = Grego::dayOfWeekInMonth(year, month, dom);
                        dtr = new DateTimeRule(month, weekInMonth, dow, mid, DateTimeRule::WALL_TIME);
                        tr.getTo()->getName(name);

//.........这里部分代码省略.........

//.........这里部分代码省略.........
        const TimeZoneRule *toRule = tzt.getTo();
        for (i = 0; i < ruleCount; i++) {
            r = (TimeZoneRule*)orgRules->elementAt(i);
            if (*r == *toRule) {
                break;
            }
        }
        if (i >= ruleCount) {
            // This case should never happen
            status = U_INVALID_STATE_ERROR;
            goto error;
        }
        if (done[i]) {
            continue;
        }
        const TimeArrayTimeZoneRule *tar = dynamic_cast<const TimeArrayTimeZoneRule *>(toRule);
        const AnnualTimeZoneRule *ar;
        if (tar != NULL) {
            // Get the previous raw offset and DST savings before the very first start time
            TimeZoneTransition tzt0;
            t = start;
            while (TRUE) {
                avail = getNextTransition(t, FALSE, tzt0);
                if (!avail) {
                    break;
                }
                if (*(tzt0.getTo()) == *tar) {
                    break;
                }
                t = tzt0.getTime();
            }
            if (avail) {
                // Check if the entire start times to be added
                tar->getFirstStart(tzt.getFrom()->getRawOffset(), tzt.getFrom()->getDSTSavings(), firstStart);
                if (firstStart > start) {
                    // Just add the rule as is
                    filteredRules->addElement(tar->clone(), status);
                    if (U_FAILURE(status)) {
                        goto error;
                    }
                } else {
                    // Colllect transitions after the start time
                    int32_t startTimes;
                    DateTimeRule::TimeRuleType timeType;
                    int32_t idx;

                    startTimes = tar->countStartTimes();
                    timeType = tar->getTimeType();
                    for (idx = 0; idx < startTimes; idx++) {
                        tar->getStartTimeAt(idx, t);
                        if (timeType == DateTimeRule::STANDARD_TIME) {
                            t -= tzt.getFrom()->getRawOffset();
                        }
                        if (timeType == DateTimeRule::WALL_TIME) {
                            t -= tzt.getFrom()->getDSTSavings();
                        }
                        if (t > start) {
                            break;
                        }
                    }
                    int32_t asize = startTimes - idx;
                    if (asize > 0) {
                        newTimes = (UDate*)uprv_malloc(sizeof(UDate) * asize);
                        if (newTimes == NULL) {
                            status = U_MEMORY_ALLOCATION_ERROR;
                            goto error;

UnicodeString&
TZGNCore::formatGenericNonLocationName(const TimeZone& tz, UTimeZoneGenericNameType type, UDate date, UnicodeString& name) const {
    U_ASSERT(type == UTZGNM_LONG || type == UTZGNM_SHORT);
    name.setToBogus();

    const UChar* uID = ZoneMeta::getCanonicalCLDRID(tz);
    if (uID == NULL) {
        return name;
    }

    UnicodeString tzID(TRUE, uID, -1);

    // Try to get a name from time zone first
    UTimeZoneNameType nameType = (type == UTZGNM_LONG) ? UTZNM_LONG_GENERIC : UTZNM_SHORT_GENERIC;
    fTimeZoneNames->getTimeZoneDisplayName(tzID, nameType, name);

    if (!name.isEmpty()) {
        return name;
    }

    // Try meta zone
    UChar mzIDBuf[32];
    UnicodeString mzID(mzIDBuf, 0, UPRV_LENGTHOF(mzIDBuf));
    fTimeZoneNames->getMetaZoneID(tzID, date, mzID);
    if (!mzID.isEmpty()) {
        UErrorCode status = U_ZERO_ERROR;
        UBool useStandard = FALSE;
        int32_t raw, sav;
        UChar tmpNameBuf[64];

        tz.getOffset(date, FALSE, raw, sav, status);
        if (U_FAILURE(status)) {
            return name;
        }

        if (sav == 0) {
            useStandard = TRUE;

            TimeZone *tmptz = tz.clone();
            // Check if the zone actually uses daylight saving time around the time
            BasicTimeZone *btz = NULL;
            if (dynamic_cast<OlsonTimeZone *>(tmptz) != NULL
                || dynamic_cast<SimpleTimeZone *>(tmptz) != NULL
                || dynamic_cast<RuleBasedTimeZone *>(tmptz) != NULL
                || dynamic_cast<VTimeZone *>(tmptz) != NULL) {
                btz = (BasicTimeZone*)tmptz;
            }

            if (btz != NULL) {
                TimeZoneTransition before;
                UBool beforTrs = btz->getPreviousTransition(date, TRUE, before);
                if (beforTrs
                        && (date - before.getTime() < kDstCheckRange)
                        && before.getFrom()->getDSTSavings() != 0) {
                    useStandard = FALSE;
                } else {
                    TimeZoneTransition after;
                    UBool afterTrs = btz->getNextTransition(date, FALSE, after);
                    if (afterTrs
                            && (after.getTime() - date < kDstCheckRange)
                            && after.getTo()->getDSTSavings() != 0) {
                        useStandard = FALSE;
                    }
                }
            } else {
                // If not BasicTimeZone... only if the instance is not an ICU's implementation.
                // We may get a wrong answer in edge case, but it should practically work OK.
                tmptz->getOffset(date - kDstCheckRange, FALSE, raw, sav, status);
                if (sav != 0) {
                    useStandard = FALSE;
                } else {
                    tmptz->getOffset(date + kDstCheckRange, FALSE, raw, sav, status);
                    if (sav != 0){
                        useStandard = FALSE;
                    }
                }
                if (U_FAILURE(status)) {
                    delete tmptz;
                    return name;
                }
            }
            delete tmptz;
        }
        if (useStandard) {
            UTimeZoneNameType stdNameType = (nameType == UTZNM_LONG_GENERIC)
                ? UTZNM_LONG_STANDARD : UTZNM_SHORT_STANDARD;
            UnicodeString stdName(tmpNameBuf, 0, UPRV_LENGTHOF(tmpNameBuf));
            fTimeZoneNames->getDisplayName(tzID, stdNameType, date, stdName);
            if (!stdName.isEmpty()) {
                name.setTo(stdName);

                // TODO: revisit this issue later
                // In CLDR, a same display name is used for both generic and standard
                // for some meta zones in some locales.  This looks like a data bugs.
                // For now, we check if the standard name is different from its generic
                // name below.
                UChar genNameBuf[64];
                UnicodeString mzGenericName(genNameBuf, 0, UPRV_LENGTHOF(genNameBuf));
                fTimeZoneNames->getMetaZoneDisplayName(mzID, nameType, mzGenericName);
                if (stdName.caseCompare(mzGenericName, 0) == 0) {
//.........这里部分代码省略.........