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Diffstat (limited to 'deps/icu-small/source/i18n/hebrwcal.cpp')
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diff --git a/deps/icu-small/source/i18n/hebrwcal.cpp b/deps/icu-small/source/i18n/hebrwcal.cpp new file mode 100644 index 0000000000..96673e5788 --- /dev/null +++ b/deps/icu-small/source/i18n/hebrwcal.cpp @@ -0,0 +1,729 @@ +/* +****************************************************************************** +* Copyright (C) 2003-2016, International Business Machines Corporation +* and others. All Rights Reserved. +****************************************************************************** +* +* File HEBRWCAL.CPP +* +* Modification History: +* +* Date Name Description +* 12/03/2003 srl ported from java HebrewCalendar +***************************************************************************** +*/ + +#include "hebrwcal.h" + +#if !UCONFIG_NO_FORMATTING + +#include "cmemory.h" +#include "umutex.h" +#include <float.h> +#include "gregoimp.h" // Math +#include "astro.h" // CalendarAstronomer +#include "uhash.h" +#include "ucln_in.h" + +// Hebrew Calendar implementation + +/** +* The absolute date, in milliseconds since 1/1/1970 AD, Gregorian, +* of the start of the Hebrew calendar. In order to keep this calendar's +* time of day in sync with that of the Gregorian calendar, we use +* midnight, rather than sunset the day before. +*/ +//static const double EPOCH_MILLIS = -180799862400000.; // 1/1/1 HY + +static const int32_t LIMITS[UCAL_FIELD_COUNT][4] = { + // Minimum Greatest Least Maximum + // Minimum Maximum + { 0, 0, 0, 0}, // ERA + { -5000000, -5000000, 5000000, 5000000}, // YEAR + { 0, 0, 12, 12}, // MONTH + { 1, 1, 51, 56}, // WEEK_OF_YEAR + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH + { 1, 1, 29, 30}, // DAY_OF_MONTH + { 1, 1, 353, 385}, // DAY_OF_YEAR + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK + { -1, -1, 5, 5}, // DAY_OF_WEEK_IN_MONTH + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET + { -5000000, -5000000, 5000000, 5000000}, // YEAR_WOY + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL + { -5000000, -5000000, 5000000, 5000000}, // EXTENDED_YEAR + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECONDS_IN_DAY + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // IS_LEAP_MONTH +}; + +/** +* The lengths of the Hebrew months. This is complicated, because there +* are three different types of years, or six if you count leap years. +* Due to the rules for postponing the start of the year to avoid having +* certain holidays fall on the sabbath, the year can end up being three +* different lengths, called "deficient", "normal", and "complete". +*/ +static const int8_t MONTH_LENGTH[][3] = { + // Deficient Normal Complete + { 30, 30, 30 }, //Tishri + { 29, 29, 30 }, //Heshvan + { 29, 30, 30 }, //Kislev + { 29, 29, 29 }, //Tevet + { 30, 30, 30 }, //Shevat + { 30, 30, 30 }, //Adar I (leap years only) + { 29, 29, 29 }, //Adar + { 30, 30, 30 }, //Nisan + { 29, 29, 29 }, //Iyar + { 30, 30, 30 }, //Sivan + { 29, 29, 29 }, //Tammuz + { 30, 30, 30 }, //Av + { 29, 29, 29 }, //Elul +}; + +/** +* The cumulative # of days to the end of each month in a non-leap year +* Although this can be calculated from the MONTH_LENGTH table, +* keeping it around separately makes some calculations a lot faster +*/ + +static const int16_t MONTH_START[][3] = { + // Deficient Normal Complete + { 0, 0, 0 }, // (placeholder) + { 30, 30, 30 }, // Tishri + { 59, 59, 60 }, // Heshvan + { 88, 89, 90 }, // Kislev + { 117, 118, 119 }, // Tevet + { 147, 148, 149 }, // Shevat + { 147, 148, 149 }, // (Adar I placeholder) + { 176, 177, 178 }, // Adar + { 206, 207, 208 }, // Nisan + { 235, 236, 237 }, // Iyar + { 265, 266, 267 }, // Sivan + { 294, 295, 296 }, // Tammuz + { 324, 325, 326 }, // Av + { 353, 354, 355 }, // Elul +}; + +/** +* The cumulative # of days to the end of each month in a leap year +*/ +static const int16_t LEAP_MONTH_START[][3] = { + // Deficient Normal Complete + { 0, 0, 0 }, // (placeholder) + { 30, 30, 30 }, // Tishri + { 59, 59, 60 }, // Heshvan + { 88, 89, 90 }, // Kislev + { 117, 118, 119 }, // Tevet + { 147, 148, 149 }, // Shevat + { 177, 178, 179 }, // Adar I + { 206, 207, 208 }, // Adar II + { 236, 237, 238 }, // Nisan + { 265, 266, 267 }, // Iyar + { 295, 296, 297 }, // Sivan + { 324, 325, 326 }, // Tammuz + { 354, 355, 356 }, // Av + { 383, 384, 385 }, // Elul +}; + +static icu::CalendarCache *gCache = NULL; + +U_CDECL_BEGIN +static UBool calendar_hebrew_cleanup(void) { + delete gCache; + gCache = NULL; + return TRUE; +} +U_CDECL_END + +U_NAMESPACE_BEGIN +//------------------------------------------------------------------------- +// Constructors... +//------------------------------------------------------------------------- + +/** +* Constructs a default <code>HebrewCalendar</code> using the current time +* in the default time zone with the default locale. +* @internal +*/ +HebrewCalendar::HebrewCalendar(const Locale& aLocale, UErrorCode& success) +: Calendar(TimeZone::createDefault(), aLocale, success) + +{ + setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly. +} + + +HebrewCalendar::~HebrewCalendar() { +} + +const char *HebrewCalendar::getType() const { + return "hebrew"; +} + +Calendar* HebrewCalendar::clone() const { + return new HebrewCalendar(*this); +} + +HebrewCalendar::HebrewCalendar(const HebrewCalendar& other) : Calendar(other) { +} + + +//------------------------------------------------------------------------- +// Rolling and adding functions overridden from Calendar +// +// These methods call through to the default implementation in IBMCalendar +// for most of the fields and only handle the unusual ones themselves. +//------------------------------------------------------------------------- + +/** +* Add a signed amount to a specified field, using this calendar's rules. +* For example, to add three days to the current date, you can call +* <code>add(Calendar.DATE, 3)</code>. +* <p> +* When adding to certain fields, the values of other fields may conflict and +* need to be changed. For example, when adding one to the {@link #MONTH MONTH} field +* for the date "30 Av 5758", the {@link #DAY_OF_MONTH DAY_OF_MONTH} field +* must be adjusted so that the result is "29 Elul 5758" rather than the invalid +* "30 Elul 5758". +* <p> +* This method is able to add to +* all fields except for {@link #ERA ERA}, {@link #DST_OFFSET DST_OFFSET}, +* and {@link #ZONE_OFFSET ZONE_OFFSET}. +* <p> +* <b>Note:</b> You should always use {@link #roll roll} and add rather +* than attempting to perform arithmetic operations directly on the fields +* of a <tt>HebrewCalendar</tt>. Since the {@link #MONTH MONTH} field behaves +* discontinuously in non-leap years, simple arithmetic can give invalid results. +* <p> +* @param field the time field. +* @param amount the amount to add to the field. +* +* @exception IllegalArgumentException if the field is invalid or refers +* to a field that cannot be handled by this method. +* @internal +*/ +void HebrewCalendar::add(UCalendarDateFields field, int32_t amount, UErrorCode& status) +{ + if(U_FAILURE(status)) { + return; + } + switch (field) { + case UCAL_MONTH: + { + // We can't just do a set(MONTH, get(MONTH) + amount). The + // reason is ADAR_1. Suppose amount is +2 and we land in + // ADAR_1 -- then we have to bump to ADAR_2 aka ADAR. But + // if amount is -2 and we land in ADAR_1, then we have to + // bump the other way -- down to SHEVAT. - Alan 11/00 + int32_t month = get(UCAL_MONTH, status); + int32_t year = get(UCAL_YEAR, status); + UBool acrossAdar1; + if (amount > 0) { + acrossAdar1 = (month < ADAR_1); // started before ADAR_1? + month += amount; + for (;;) { + if (acrossAdar1 && month>=ADAR_1 && !isLeapYear(year)) { + ++month; + } + if (month <= ELUL) { + break; + } + month -= ELUL+1; + ++year; + acrossAdar1 = TRUE; + } + } else { + acrossAdar1 = (month > ADAR_1); // started after ADAR_1? + month += amount; + for (;;) { + if (acrossAdar1 && month<=ADAR_1 && !isLeapYear(year)) { + --month; + } + if (month >= 0) { + break; + } + month += ELUL+1; + --year; + acrossAdar1 = TRUE; + } + } + set(UCAL_MONTH, month); + set(UCAL_YEAR, year); + pinField(UCAL_DAY_OF_MONTH, status); + break; + } + + default: + Calendar::add(field, amount, status); + break; + } +} + +/** +* @deprecated ICU 2.6 use UCalendarDateFields instead of EDateFields +*/ +void HebrewCalendar::add(EDateFields field, int32_t amount, UErrorCode& status) +{ + add((UCalendarDateFields)field, amount, status); +} + +/** +* Rolls (up/down) a specified amount time on the given field. For +* example, to roll the current date up by three days, you can call +* <code>roll(Calendar.DATE, 3)</code>. If the +* field is rolled past its maximum allowable value, it will "wrap" back +* to its minimum and continue rolling. +* For example, calling <code>roll(Calendar.DATE, 10)</code> +* on a Hebrew calendar set to "25 Av 5758" will result in the date "5 Av 5758". +* <p> +* When rolling certain fields, the values of other fields may conflict and +* need to be changed. For example, when rolling the {@link #MONTH MONTH} field +* upward by one for the date "30 Av 5758", the {@link #DAY_OF_MONTH DAY_OF_MONTH} field +* must be adjusted so that the result is "29 Elul 5758" rather than the invalid +* "30 Elul". +* <p> +* This method is able to roll +* all fields except for {@link #ERA ERA}, {@link #DST_OFFSET DST_OFFSET}, +* and {@link #ZONE_OFFSET ZONE_OFFSET}. Subclasses may, of course, add support for +* additional fields in their overrides of <code>roll</code>. +* <p> +* <b>Note:</b> You should always use roll and {@link #add add} rather +* than attempting to perform arithmetic operations directly on the fields +* of a <tt>HebrewCalendar</tt>. Since the {@link #MONTH MONTH} field behaves +* discontinuously in non-leap years, simple arithmetic can give invalid results. +* <p> +* @param field the time field. +* @param amount the amount by which the field should be rolled. +* +* @exception IllegalArgumentException if the field is invalid or refers +* to a field that cannot be handled by this method. +* @internal +*/ +void HebrewCalendar::roll(UCalendarDateFields field, int32_t amount, UErrorCode& status) +{ + if(U_FAILURE(status)) { + return; + } + switch (field) { + case UCAL_MONTH: + { + int32_t month = get(UCAL_MONTH, status); + int32_t year = get(UCAL_YEAR, status); + + UBool leapYear = isLeapYear(year); + int32_t yearLength = monthsInYear(year); + int32_t newMonth = month + (amount % yearLength); + // + // If it's not a leap year and we're rolling past the missing month + // of ADAR_1, we need to roll an extra month to make up for it. + // + if (!leapYear) { + if (amount > 0 && month < ADAR_1 && newMonth >= ADAR_1) { + newMonth++; + } else if (amount < 0 && month > ADAR_1 && newMonth <= ADAR_1) { + newMonth--; + } + } + set(UCAL_MONTH, (newMonth + 13) % 13); + pinField(UCAL_DAY_OF_MONTH, status); + return; + } + default: + Calendar::roll(field, amount, status); + } +} + +void HebrewCalendar::roll(EDateFields field, int32_t amount, UErrorCode& status) { + roll((UCalendarDateFields)field, amount, status); +} + +//------------------------------------------------------------------------- +// Support methods +//------------------------------------------------------------------------- + +// Hebrew date calculations are performed in terms of days, hours, and +// "parts" (or halakim), which are 1/1080 of an hour, or 3 1/3 seconds. +static const int32_t HOUR_PARTS = 1080; +static const int32_t DAY_PARTS = 24*HOUR_PARTS; + +// An approximate value for the length of a lunar month. +// It is used to calculate the approximate year and month of a given +// absolute date. +static const int32_t MONTH_DAYS = 29; +static const int32_t MONTH_FRACT = 12*HOUR_PARTS + 793; +static const int32_t MONTH_PARTS = MONTH_DAYS*DAY_PARTS + MONTH_FRACT; + +// The time of the new moon (in parts) on 1 Tishri, year 1 (the epoch) +// counting from noon on the day before. BAHARAD is an abbreviation of +// Bet (Monday), Hey (5 hours from sunset), Resh-Daled (204). +static const int32_t BAHARAD = 11*HOUR_PARTS + 204; + +/** +* Finds the day # of the first day in the given Hebrew year. +* To do this, we want to calculate the time of the Tishri 1 new moon +* in that year. +* <p> +* The algorithm here is similar to ones described in a number of +* references, including: +* <ul> +* <li>"Calendrical Calculations", by Nachum Dershowitz & Edward Reingold, +* Cambridge University Press, 1997, pages 85-91. +* +* <li>Hebrew Calendar Science and Myths, +* <a href="http://www.geocities.com/Athens/1584/"> +* http://www.geocities.com/Athens/1584/</a> +* +* <li>The Calendar FAQ, +* <a href="http://www.faqs.org/faqs/calendars/faq/"> +* http://www.faqs.org/faqs/calendars/faq/</a> +* </ul> +*/ +int32_t HebrewCalendar::startOfYear(int32_t year, UErrorCode &status) +{ + ucln_i18n_registerCleanup(UCLN_I18N_HEBREW_CALENDAR, calendar_hebrew_cleanup); + int32_t day = CalendarCache::get(&gCache, year, status); + + if (day == 0) { + int32_t months = (235 * year - 234) / 19; // # of months before year + + int64_t frac = (int64_t)months * MONTH_FRACT + BAHARAD; // Fractional part of day # + day = months * 29 + (int32_t)(frac / DAY_PARTS); // Whole # part of calculation + frac = frac % DAY_PARTS; // Time of day + + int32_t wd = (day % 7); // Day of week (0 == Monday) + + if (wd == 2 || wd == 4 || wd == 6) { + // If the 1st is on Sun, Wed, or Fri, postpone to the next day + day += 1; + wd = (day % 7); + } + if (wd == 1 && frac > 15*HOUR_PARTS+204 && !isLeapYear(year) ) { + // If the new moon falls after 3:11:20am (15h204p from the previous noon) + // on a Tuesday and it is not a leap year, postpone by 2 days. + // This prevents 356-day years. + day += 2; + } + else if (wd == 0 && frac > 21*HOUR_PARTS+589 && isLeapYear(year-1) ) { + // If the new moon falls after 9:32:43 1/3am (21h589p from yesterday noon) + // on a Monday and *last* year was a leap year, postpone by 1 day. + // Prevents 382-day years. + day += 1; + } + CalendarCache::put(&gCache, year, day, status); + } + return day; +} + +/** +* Find the day of the week for a given day +* +* @param day The # of days since the start of the Hebrew calendar, +* 1-based (i.e. 1/1/1 AM is day 1). +*/ +int32_t HebrewCalendar::absoluteDayToDayOfWeek(int32_t day) +{ + // We know that 1/1/1 AM is a Monday, which makes the math easy... + return (day % 7) + 1; +} + +/** +* Returns the the type of a given year. +* 0 "Deficient" year with 353 or 383 days +* 1 "Normal" year with 354 or 384 days +* 2 "Complete" year with 355 or 385 days +*/ +int32_t HebrewCalendar::yearType(int32_t year) const +{ + int32_t yearLength = handleGetYearLength(year); + + if (yearLength > 380) { + yearLength -= 30; // Subtract length of leap month. + } + + int type = 0; + + switch (yearLength) { + case 353: + type = 0; break; + case 354: + type = 1; break; + case 355: + type = 2; break; + default: + //throw new RuntimeException("Illegal year length " + yearLength + " in year " + year); + type = 1; + } + return type; +} + +/** +* Determine whether a given Hebrew year is a leap year +* +* The rule here is that if (year % 19) == 0, 3, 6, 8, 11, 14, or 17. +* The formula below performs the same test, believe it or not. +*/ +UBool HebrewCalendar::isLeapYear(int32_t year) { + //return (year * 12 + 17) % 19 >= 12; + int32_t x = (year*12 + 17) % 19; + return x >= ((x < 0) ? -7 : 12); +} + +int32_t HebrewCalendar::monthsInYear(int32_t year) { + return isLeapYear(year) ? 13 : 12; +} + +//------------------------------------------------------------------------- +// Calendar framework +//------------------------------------------------------------------------- + +/** +* @internal +*/ +int32_t HebrewCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const { + return LIMITS[field][limitType]; +} + +/** +* Returns the length of the given month in the given year +* @internal +*/ +int32_t HebrewCalendar::handleGetMonthLength(int32_t extendedYear, int32_t month) const { + // Resolve out-of-range months. This is necessary in order to + // obtain the correct year. We correct to + // a 12- or 13-month year (add/subtract 12 or 13, depending + // on the year) but since we _always_ number from 0..12, and + // the leap year determines whether or not month 5 (Adar 1) + // is present, we allow 0..12 in any given year. + while (month < 0) { + month += monthsInYear(--extendedYear); + } + // Careful: allow 0..12 in all years + while (month > 12) { + month -= monthsInYear(extendedYear++); + } + + switch (month) { + case HESHVAN: + case KISLEV: + // These two month lengths can vary + return MONTH_LENGTH[month][yearType(extendedYear)]; + + default: + // The rest are a fixed length + return MONTH_LENGTH[month][0]; + } +} + +/** +* Returns the number of days in the given Hebrew year +* @internal +*/ +int32_t HebrewCalendar::handleGetYearLength(int32_t eyear) const { + UErrorCode status = U_ZERO_ERROR; + return startOfYear(eyear+1, status) - startOfYear(eyear, status); +} + +void HebrewCalendar::validateField(UCalendarDateFields field, UErrorCode &status) { + if (field == UCAL_MONTH && !isLeapYear(handleGetExtendedYear()) && internalGet(UCAL_MONTH) == ADAR_1) { + status = U_ILLEGAL_ARGUMENT_ERROR; + return; + } + Calendar::validateField(field, status); +} +//------------------------------------------------------------------------- +// Functions for converting from milliseconds to field values +//------------------------------------------------------------------------- + +/** +* Subclasses may override this method to compute several fields +* specific to each calendar system. These are: +* +* <ul><li>ERA +* <li>YEAR +* <li>MONTH +* <li>DAY_OF_MONTH +* <li>DAY_OF_YEAR +* <li>EXTENDED_YEAR</ul> +* +* Subclasses can refer to the DAY_OF_WEEK and DOW_LOCAL fields, +* which will be set when this method is called. Subclasses can +* also call the getGregorianXxx() methods to obtain Gregorian +* calendar equivalents for the given Julian day. +* +* <p>In addition, subclasses should compute any subclass-specific +* fields, that is, fields from BASE_FIELD_COUNT to +* getFieldCount() - 1. +* @internal +*/ +void HebrewCalendar::handleComputeFields(int32_t julianDay, UErrorCode &status) { + int32_t d = julianDay - 347997; + double m = ((d * (double)DAY_PARTS)/ (double) MONTH_PARTS); // Months (approx) + int32_t year = (int32_t)( ((19. * m + 234.) / 235.) + 1.); // Years (approx) + int32_t ys = startOfYear(year, status); // 1st day of year + int32_t dayOfYear = (d - ys); + + // Because of the postponement rules, it's possible to guess wrong. Fix it. + while (dayOfYear < 1) { + year--; + ys = startOfYear(year, status); + dayOfYear = (d - ys); + } + + // Now figure out which month we're in, and the date within that month + int32_t type = yearType(year); + UBool isLeap = isLeapYear(year); + + int32_t month = 0; + int32_t momax = UPRV_LENGTHOF(MONTH_START); + while (month < momax && dayOfYear > ( isLeap ? LEAP_MONTH_START[month][type] : MONTH_START[month][type] ) ) { + month++; + } + if (month >= momax || month<=0) { + // TODO: I found dayOfYear could be out of range when + // a large value is set to julianDay. I patched startOfYear + // to reduce the chace, but it could be still reproduced either + // by startOfYear or other places. For now, we check + // the month is in valid range to avoid out of array index + // access problem here. However, we need to carefully review + // the calendar implementation to check the extreme limit of + // each calendar field and the code works well for any values + // in the valid value range. -yoshito + status = U_ILLEGAL_ARGUMENT_ERROR; + return; + } + month--; + int dayOfMonth = dayOfYear - (isLeap ? LEAP_MONTH_START[month][type] : MONTH_START[month][type]); + + internalSet(UCAL_ERA, 0); + internalSet(UCAL_YEAR, year); + internalSet(UCAL_EXTENDED_YEAR, year); + internalSet(UCAL_MONTH, month); + internalSet(UCAL_DAY_OF_MONTH, dayOfMonth); + internalSet(UCAL_DAY_OF_YEAR, dayOfYear); +} + +//------------------------------------------------------------------------- +// Functions for converting from field values to milliseconds +//------------------------------------------------------------------------- + +/** +* @internal +*/ +int32_t HebrewCalendar::handleGetExtendedYear() { + int32_t year; + if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) { + year = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1 + } else { + year = internalGet(UCAL_YEAR, 1); // Default to year 1 + } + return year; +} + +/** +* Return JD of start of given month/year. +* @internal +*/ +int32_t HebrewCalendar::handleComputeMonthStart(int32_t eyear, int32_t month, UBool /*useMonth*/) const { + UErrorCode status = U_ZERO_ERROR; + // Resolve out-of-range months. This is necessary in order to + // obtain the correct year. We correct to + // a 12- or 13-month year (add/subtract 12 or 13, depending + // on the year) but since we _always_ number from 0..12, and + // the leap year determines whether or not month 5 (Adar 1) + // is present, we allow 0..12 in any given year. + while (month < 0) { + month += monthsInYear(--eyear); + } + // Careful: allow 0..12 in all years + while (month > 12) { + month -= monthsInYear(eyear++); + } + + int32_t day = startOfYear(eyear, status); + + if(U_FAILURE(status)) { + return 0; + } + + if (month != 0) { + if (isLeapYear(eyear)) { + day += LEAP_MONTH_START[month][yearType(eyear)]; + } else { + day += MONTH_START[month][yearType(eyear)]; + } + } + + return (int) (day + 347997); +} + +UBool +HebrewCalendar::inDaylightTime(UErrorCode& status) const +{ + // copied from GregorianCalendar + if (U_FAILURE(status) || !getTimeZone().useDaylightTime()) + return FALSE; + + // Force an update of the state of the Calendar. + ((HebrewCalendar*)this)->complete(status); // cast away const + + return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE); +} + +/** + * The system maintains a static default century start date and Year. They are + * initialized the first time they are used. Once the system default century date + * and year are set, they do not change. + */ +static UDate gSystemDefaultCenturyStart = DBL_MIN; +static int32_t gSystemDefaultCenturyStartYear = -1; +static icu::UInitOnce gSystemDefaultCenturyInit = U_INITONCE_INITIALIZER; + +UBool HebrewCalendar::haveDefaultCentury() const +{ + return TRUE; +} + +static void U_CALLCONV initializeSystemDefaultCentury() +{ + // initialize systemDefaultCentury and systemDefaultCenturyYear based + // on the current time. They'll be set to 80 years before + // the current time. + UErrorCode status = U_ZERO_ERROR; + HebrewCalendar calendar(Locale("@calendar=hebrew"),status); + if (U_SUCCESS(status)) { + calendar.setTime(Calendar::getNow(), status); + calendar.add(UCAL_YEAR, -80, status); + + gSystemDefaultCenturyStart = calendar.getTime(status); + gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status); + } + // We have no recourse upon failure unless we want to propagate the failure + // out. +} + + +UDate HebrewCalendar::defaultCenturyStart() const { + // lazy-evaluate systemDefaultCenturyStart + umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury); + return gSystemDefaultCenturyStart; +} + +int32_t HebrewCalendar::defaultCenturyStartYear() const { + // lazy-evaluate systemDefaultCenturyStartYear + umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury); + return gSystemDefaultCenturyStartYear; +} + + +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(HebrewCalendar) + +U_NAMESPACE_END + +#endif // UCONFIG_NO_FORMATTING |