Beispiel #1
0
bool DateComponents::setMillisecondsSinceEpochForDateInternal(double ms) {
  m_year = msToYear(ms);
  int yearDay = dayInYear(ms, m_year);
  m_month = monthFromDayInYear(yearDay, isLeapYear(m_year));
  m_monthDay = dayInMonthFromDayInYear(yearDay, isLeapYear(m_year));
  return true;
}
Beispiel #2
0
static SoupDate* msToSoupDate(double ms)
{
    int year = msToYear(ms);
    int dayOfYear = dayInYear(ms, year);
    bool leapYear = isLeapYear(year);
    return soup_date_new(year, monthFromDayInYear(dayOfYear, leapYear), dayInMonthFromDayInYear(dayOfYear, leapYear), msToHours(ms), msToMinutes(ms), static_cast<int>(ms / 1000) % 60);
}
Beispiel #3
0
void msToGregorianDateTime(double ms, bool outputIsUTC, GregorianDateTime& tm)
{
    // input is UTC
    double dstOff = 0.0;
    const double utcOff = getUTCOffset();

    if (!outputIsUTC) {  // convert to local time
        dstOff = getDSTOffset(ms, utcOff);
        ms += dstOff + utcOff;
    }

    const int year = msToYear(ms);
    tm.second   =  msToSeconds(ms);
    tm.minute   =  msToMinutes(ms);
    tm.hour     =  msToHours(ms);
    tm.weekDay  =  msToWeekDay(ms);
    tm.yearDay  =  dayInYear(ms, year);
    tm.monthDay =  dayInMonthFromDayInYear(tm.yearDay, isLeapYear(year));
    tm.month    =  monthFromDayInYear(tm.yearDay, isLeapYear(year));
    tm.year     =  year - 1900;
    tm.isDST    =  dstOff != 0.0;

    tm.utcOffset = outputIsUTC ? 0 : static_cast<long>((dstOff + utcOff) / msPerSecond);
    tm.timeZone = NULL;
}
Beispiel #4
0
// Returns combined offset in millisecond (UTC + DST).
LocalTimeOffset calculateLocalTimeOffset(double ms, TimeType inputTimeType)
{
#if HAVE(TM_GMTOFF)
    double localToUTCTimeOffset = inputTimeType == LocalTime ? calculateUTCOffset() : 0;
#else
    double localToUTCTimeOffset = calculateUTCOffset();
#endif
    if (inputTimeType == LocalTime)
        ms -= localToUTCTimeOffset;

    // On Mac OS X, the call to localtime (see calculateDSTOffset) will return historically accurate
    // DST information (e.g. New Zealand did not have DST from 1946 to 1974) however the JavaScript
    // standard explicitly dictates that historical information should not be considered when
    // determining DST. For this reason we shift away from years that localtime can handle but would
    // return historically accurate information.
    int year = msToYear(ms);
    int equivalentYear = equivalentYearForDST(year);
    if (year != equivalentYear) {
        bool leapYear = isLeapYear(year);
        int dayInYearLocal = dayInYear(ms, year);
        int dayInMonth = dayInMonthFromDayInYear(dayInYearLocal, leapYear);
        int month = monthFromDayInYear(dayInYearLocal, leapYear);
        double day = dateToDaysFrom1970(equivalentYear, month, dayInMonth);
        ms = (day * msPerDay) + msToMilliseconds(ms);
    }

    double localTimeSeconds = ms / msPerSecond;
    if (localTimeSeconds > maxUnixTime)
        localTimeSeconds = maxUnixTime;
    else if (localTimeSeconds < 0) // Go ahead a day to make localtime work (does not work with 0).
        localTimeSeconds += secondsPerDay;
    // FIXME: time_t has a potential problem in 2038.
    time_t localTime = static_cast<time_t>(localTimeSeconds);

#if HAVE(TM_GMTOFF)
    tm localTM;
    getLocalTime(&localTime, &localTM);
    return LocalTimeOffset(localTM.tm_isdst, localTM.tm_gmtoff * msPerSecond);
#else
    double dstOffset = calculateDSTOffset(localTime, localToUTCTimeOffset);
    return LocalTimeOffset(dstOffset, localToUTCTimeOffset + dstOffset);
#endif
}
Beispiel #5
0
// Get the DST offset, given a time in UTC
static double calculateDSTOffset(double ms, double utcOffset)
{
    // On Mac OS X, the call to localtime (see calculateDSTOffsetSimple) will return historically accurate
    // DST information (e.g. New Zealand did not have DST from 1946 to 1974) however the JavaScript
    // standard explicitly dictates that historical information should not be considered when
    // determining DST. For this reason we shift away from years that localtime can handle but would
    // return historically accurate information.
    int year = msToYear(ms);
    int equivalentYear = equivalentYearForDST(year);
    if (year != equivalentYear) {
        bool leapYear = isLeapYear(year);
        int dayInYearLocal = dayInYear(ms, year);
        int dayInMonth = dayInMonthFromDayInYear(dayInYearLocal, leapYear);
        int month = monthFromDayInYear(dayInYearLocal, leapYear);
        double day = dateToDaysFrom1970(equivalentYear, month, dayInMonth);
        ms = (day * msPerDay) + msToMilliseconds(ms);
    }

    return calculateDSTOffsetSimple(ms / msPerSecond, utcOffset);
}
// input is UTC
void msToGregorianDateTime(VM& vm, double ms, WTF::TimeType outputTimeType, GregorianDateTime& tm)
{
    LocalTimeOffset localTime;
    if (outputTimeType == WTF::LocalTime) {
        localTime = localTimeOffset(vm, ms);
        ms += localTime.offset;
    }

    const int year = msToYear(ms);
    tm.setSecond(msToSeconds(ms));
    tm.setMinute(msToMinutes(ms));
    tm.setHour(msToHours(ms));
    tm.setWeekDay(msToWeekDay(ms));
    tm.setYearDay(dayInYear(ms, year));
    tm.setMonthDay(dayInMonthFromDayInYear(tm.yearDay(), isLeapYear(year)));
    tm.setMonth(monthFromDayInYear(tm.yearDay(), isLeapYear(year)));
    tm.setYear(year);
    tm.setIsDST(localTime.isDST);
    tm.setUtcOffset(localTime.offset / WTF::msPerSecond);
}
Beispiel #7
0
// input is UTC
void msToGregorianDateTime(ExecState* exec, double ms, bool outputIsUTC, GregorianDateTime& tm)
{
    LocalTimeOffset localTime(false, 0);
    if (!outputIsUTC) {
        localTime = localTimeOffset(exec, ms);
        ms += localTime.offset;
    }

    const int year = msToYear(ms);
    tm.second   =  msToSeconds(ms);
    tm.minute   =  msToMinutes(ms);
    tm.hour     =  msToHours(ms);
    tm.weekDay  =  msToWeekDay(ms);
    tm.yearDay  =  dayInYear(ms, year);
    tm.monthDay =  dayInMonthFromDayInYear(tm.yearDay, isLeapYear(year));
    tm.month    =  monthFromDayInYear(tm.yearDay, isLeapYear(year));
    tm.year     =  year - 1900;
    tm.isDST    =  localTime.isDST;
    tm.utcOffset = localTime.offset / WTF::msPerSecond;
    tm.timeZone = NULL;
}
Beispiel #8
0
// input is UTC
void msToGregorianDateTime(ExecState* exec, double ms, bool outputIsUTC, GregorianDateTime& tm)
{
    double dstOff = 0.0;
    double utcOff = 0.0;
    if (!outputIsUTC) {
        utcOff = getUTCOffset(exec);
        dstOff = getDSTOffset(exec, ms, utcOff);
        ms += dstOff + utcOff;
    }

    const int year = msToYear(ms);
    tm.setSecond(msToSeconds(ms));
    tm.setMinute(msToMinutes(ms));
    tm.setHour(msToHours(ms));
    tm.setWeekDay(msToWeekDay(ms));
    tm.setYearDay(dayInYear(ms, year));
    tm.setMonthDay(dayInMonthFromDayInYear(tm.yearDay(), isLeapYear(year)));
    tm.setMonth(monthFromDayInYear(tm.yearDay(), isLeapYear(year)));
    tm.setYear(year);
    tm.setIsDST(dstOff != 0.0);
    tm.setUtcOffset(static_cast<long>((dstOff + utcOff) / WTF::msPerSecond));
}
Beispiel #9
0
// input is UTC
void msToGregorianDateTime(ExecState* exec, double ms, bool outputIsUTC, GregorianDateTime& tm)
{
    double dstOff = 0.0;
    double utcOff = 0.0;
    if (!outputIsUTC) {
        utcOff = getUTCOffset(exec);
        dstOff = getDSTOffset(exec, ms, utcOff);
        ms += dstOff + utcOff;
    }

    const int year = msToYear(ms);
    tm.second   =  msToSeconds(ms);
    tm.minute   =  msToMinutes(ms);
    tm.hour     =  msToHours(ms);
    tm.weekDay  =  msToWeekDay(ms);
    tm.yearDay  =  dayInYear(ms, year);
    tm.monthDay =  dayInMonthFromDayInYear(tm.yearDay, isLeapYear(year));
    tm.month    =  monthFromDayInYear(tm.yearDay, isLeapYear(year));
    tm.year     =  year - 1900;
    tm.isDST    =  dstOff != 0.0;
    tm.utcOffset = static_cast<long>((dstOff + utcOff) / WTF::msPerSecond);
    tm.timeZone = NULL;
}