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);
}
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;
}
bool DateComponents::setMillisecondsSinceEpochForWeek(double ms) {
m_type = Invalid;
if (!std::isfinite(ms))
return false;
ms = round(ms);
m_year = msToYear(ms);
if (m_year < minimumYear() || m_year > maximumYear())
return false;
int yearDay = dayInYear(ms, m_year);
int offset = offsetTo1stWeekStart(m_year);
if (yearDay < offset) {
// The day belongs to the last week of the previous year.
m_year--;
if (m_year <= minimumYear())
return false;
m_week = maxWeekNumberInYear();
} else {
m_week = ((yearDay - offset) / 7) + 1;
if (m_week > maxWeekNumberInYear()) {
m_year++;
m_week = 1;
}
if (m_year > maximumYear() ||
(m_year == maximumYear() && m_week > maximumWeekInMaximumYear))
return false;
}
m_type = Week;
return true;
}
static inline int msToMonth(double ms)
{
int step;
int year = msToYear(ms);
int d = dayInYear(ms, year);
if (d < (step = 31))
return 0;
step += (isInLeapYear(ms) ? 29 : 28);
if (d < step)
return 1;
if (d < (step += 31))
return 2;
if (d < (step += 30))
return 3;
if (d < (step += 31))
return 4;
if (d < (step += 30))
return 5;
if (d < (step += 31))
return 6;
if (d < (step += 31))
return 7;
if (d < (step += 30))
return 8;
if (d < (step += 31))
return 9;
if (d < (step += 30))
return 10;
return 11;
}
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;
}
double dateToDaysFrom1970(int year, int month, int day)
{
year += month / 12;
month %= 12;
if (month < 0) {
month += 12;
--year;
}
double yearday = floor(daysFrom1970ToYear(year));
ASSERT((year >= 1970 && yearday >= 0) || (year < 1970 && yearday < 0));
return yearday + dayInYear(year, month, day);
}
void GregorianDateTime::setToCurrentLocalTime()
{
#if OS(WINDOWS)
SYSTEMTIME systemTime;
GetLocalTime(&systemTime);
TIME_ZONE_INFORMATION timeZoneInformation;
DWORD timeZoneId = GetTimeZoneInformation(&timeZoneInformation);
LONG bias = 0;
if (timeZoneId != TIME_ZONE_ID_INVALID) {
bias = timeZoneInformation.Bias;
if (timeZoneId == TIME_ZONE_ID_DAYLIGHT)
bias += timeZoneInformation.DaylightBias;
else if ((timeZoneId == TIME_ZONE_ID_STANDARD) || (timeZoneId == TIME_ZONE_ID_UNKNOWN))
bias += timeZoneInformation.StandardBias;
else
ASSERT(0);
}
m_year = systemTime.wYear;
m_month = systemTime.wMonth - 1;
m_monthDay = systemTime.wDay;
m_yearDay = dayInYear(m_year, m_month, m_monthDay);
m_weekDay = systemTime.wDayOfWeek;
m_hour = systemTime.wHour;
m_minute = systemTime.wMinute;
m_second = systemTime.wSecond;
m_utcOffset = -bias * secondsPerMinute;
m_isDST = timeZoneId == TIME_ZONE_ID_DAYLIGHT ? 1 : 0;
#else
tm localTM;
time_t localTime = time(0);
localtime_r(&localTime, &localTM);
m_year = localTM.tm_year + 1900;
m_month = localTM.tm_mon;
m_monthDay = localTM.tm_mday;
m_yearDay = localTM.tm_yday;
m_weekDay = localTM.tm_wday;
m_hour = localTM.tm_hour;
m_minute = localTM.tm_min;
m_second = localTM.tm_sec;
m_isDST = localTM.tm_isdst;
#if HAVE(TM_GMTOFF)
m_utcOffset = localTM.tm_gmtoff;
#else
m_utcOffset = calculateLocalTimeOffset(localTime * msPerSecond).offset / msPerSecond;
#endif
#endif
}
// 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
}
static inline int msToDayInMonth(double ms)
{
int step, next;
int year = msToYear(ms);
int d = dayInYear(ms, year);
if (d <= (next = 30))
return d + 1;
step = next;
next += (isInLeapYear(ms) ? 29 : 28);
if (d <= next)
return d - step;
step = next;
if (d <= (next += 31))
return d - step;
step = next;
if (d <= (next += 30))
return d - step;
step = next;
if (d <= (next += 31))
return d - step;
step = next;
if (d <= (next += 30))
return d - step;
step = next;
if (d <= (next += 31))
return d - step;
step = next;
if (d <= (next += 31))
return d - step;
step = next;
if (d <= (next += 30))
return d - step;
step = next;
if (d <= (next += 31))
return d - step;
step = next;
if (d <= (next += 30))
return d - step;
step = next;
return d - step;
}
// 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);
}
// 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;
}
// 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));
}
// 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;
}
void msToGregorianDateTime(double ms, bool outputIsUTC, GregorianDateTime& tm)
{
// input is UTC
double dstOff = 0.0;
if (!outputIsUTC) { // convert to local time
dstOff = getDSTOffset(ms);
ms += dstOff + getUTCOffset();
}
tm.second = msToSeconds(ms);
tm.minute = msToMinutes(ms);
tm.hour = msToHours(ms);
tm.weekDay = msToWeekDay(ms);
tm.monthDay = msToDayInMonth(ms);
tm.yearDay = dayInYear(ms, msToYear(ms));
tm.month = msToMonth(ms);
tm.year = msToYear(ms) - 1900;
tm.isDST = dstOff != 0.0;
tm.utcOffset = static_cast<long>((dstOff + getUTCOffset()) / msPerSecond);
tm.timeZone = NULL;
}
char* DS3231::dateFormat(const char* dateFormat, RTCDateTime dt)
{
char buffer[255];
buffer[0] = 0;
char helper[11];
while (*dateFormat != '\0')
{
switch (dateFormat[0])
{
// Day decoder
case 'd':
sprintf(helper, "%02d", dt.day);
strcat(buffer, (const char *)helper);
break;
case 'j':
sprintf(helper, "%d", dt.day);
strcat(buffer, (const char *)helper);
break;
case 'l':
strcat(buffer, (const char *)strDayOfWeek(dt.dayOfWeek));
break;
case 'D':
strncat(buffer, strDayOfWeek(dt.dayOfWeek), 3);
break;
case 'N':
sprintf(helper, "%d", dt.dayOfWeek);
strcat(buffer, (const char *)helper);
break;
case 'w':
sprintf(helper, "%d", (dt.dayOfWeek + 7) % 7);
strcat(buffer, (const char *)helper);
break;
case 'z':
sprintf(helper, "%d", dayInYear(dt.year, dt.month, dt.day));
strcat(buffer, (const char *)helper);
break;
case 'S':
strcat(buffer, (const char *)strDaySufix(dt.day));
break;
// Month decoder
case 'm':
sprintf(helper, "%02d", dt.month);
strcat(buffer, (const char *)helper);
break;
case 'n':
sprintf(helper, "%d", dt.month);
strcat(buffer, (const char *)helper);
break;
case 'F':
strcat(buffer, (const char *)strMonth(dt.month));
break;
case 'M':
strncat(buffer, (const char *)strMonth(dt.month), 3);
break;
case 't':
sprintf(helper, "%d", daysInMonth(dt.year, dt.month));
strcat(buffer, (const char *)helper);
break;
// Year decoder
case 'Y':
sprintf(helper, "%d", dt.year);
strcat(buffer, (const char *)helper);
break;
case 'y': sprintf(helper, "%02d", dt.year-2000);
strcat(buffer, (const char *)helper);
break;
case 'L':
sprintf(helper, "%d", isLeapYear(dt.year));
strcat(buffer, (const char *)helper);
break;
// Hour decoder
case 'H':
sprintf(helper, "%02d", dt.hour);
strcat(buffer, (const char *)helper);
break;
case 'G':
sprintf(helper, "%d", dt.hour);
strcat(buffer, (const char *)helper);
break;
case 'h':
sprintf(helper, "%02d", hour12(dt.hour));
strcat(buffer, (const char *)helper);
break;
case 'g':
sprintf(helper, "%d", hour12(dt.hour));
strcat(buffer, (const char *)helper);
break;
case 'A':
strcat(buffer, (const char *)strAmPm(dt.hour, true));
break;
case 'a':
strcat(buffer, (const char *)strAmPm(dt.hour, false));
break;
// Minute decoder
case 'i':
sprintf(helper, "%02d", dt.minute);
strcat(buffer, (const char *)helper);
break;
// Second decoder
case 's':
sprintf(helper, "%02d", dt.second);
strcat(buffer, (const char *)helper);
break;
// Misc decoder
case 'U':
sprintf(helper, "%lu", dt.unixtime);
strcat(buffer, (const char *)helper);
break;
default:
strncat(buffer, dateFormat, 1);
break;
}
dateFormat++;
}
return buffer;
}
