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-// © 2016 and later: Unicode, Inc. and others.
-// License & terms of use: http://www.unicode.org/copyright.html
-/*
-*******************************************************************************
-* Copyright (C) 1997-2016, International Business Machines Corporation and
-* others. All Rights Reserved.
-*******************************************************************************
-*
-* File GREGOCAL.CPP
-*
-* Modification History:
-*
-* Date Name Description
-* 02/05/97 clhuang Creation.
-* 03/28/97 aliu Made highly questionable fix to computeFields to
-* handle DST correctly.
-* 04/22/97 aliu Cleaned up code drastically. Added monthLength().
-* Finished unimplemented parts of computeTime() for
-* week-based date determination. Removed quetionable
-* fix and wrote correct fix for computeFields() and
-* daylight time handling. Rewrote inDaylightTime()
-* and computeFields() to handle sensitive Daylight to
-* Standard time transitions correctly.
-* 05/08/97 aliu Added code review changes. Fixed isLeapYear() to
-* not cutover.
-* 08/12/97 aliu Added equivalentTo. Misc other fixes. Updated
-* add() from Java source.
-* 07/28/98 stephen Sync up with JDK 1.2
-* 09/14/98 stephen Changed type of kOneDay, kOneWeek to double.
-* Fixed bug in roll()
-* 10/15/99 aliu Fixed j31, incorrect WEEK_OF_YEAR computation.
-* 10/15/99 aliu Fixed j32, cannot set date to Feb 29 2000 AD.
-* {JDK bug 4210209 4209272}
-* 11/15/99 weiv Added YEAR_WOY and DOW_LOCAL computation
-* to timeToFields method, updated kMinValues, kMaxValues & kLeastMaxValues
-* 12/09/99 aliu Fixed j81, calculation errors and roll bugs
-* in year of cutover.
-* 01/24/2000 aliu Revised computeJulianDay for YEAR YEAR_WOY WOY.
-********************************************************************************
-*/
-
-#include "unicode/utypes.h"
-#include <float.h>
-
-#if !UCONFIG_NO_FORMATTING
-
-#include "unicode/gregocal.h"
-#include "gregoimp.h"
-#include "umutex.h"
-#include "uassert.h"
-
-// *****************************************************************************
-// class GregorianCalendar
-// *****************************************************************************
-
-/**
-* Note that the Julian date used here is not a true Julian date, since
-* it is measured from midnight, not noon. This value is the Julian
-* day number of January 1, 1970 (Gregorian calendar) at noon UTC. [LIU]
-*/
-
-static const int16_t kNumDays[]
-= {0,31,59,90,120,151,181,212,243,273,304,334}; // 0-based, for day-in-year
-static const int16_t kLeapNumDays[]
-= {0,31,60,91,121,152,182,213,244,274,305,335}; // 0-based, for day-in-year
-static const int8_t kMonthLength[]
-= {31,28,31,30,31,30,31,31,30,31,30,31}; // 0-based
-static const int8_t kLeapMonthLength[]
-= {31,29,31,30,31,30,31,31,30,31,30,31}; // 0-based
-
-// setTimeInMillis() limits the Julian day range to +/-7F000000.
-// This would seem to limit the year range to:
-// ms=+183882168921600000 jd=7f000000 December 20, 5828963 AD
-// ms=-184303902528000000 jd=81000000 September 20, 5838270 BC
-// HOWEVER, CalendarRegressionTest/Test4167060 shows that the actual
-// range limit on the year field is smaller (~ +/-140000). [alan 3.0]
-
-static const int32_t kGregorianCalendarLimits[UCAL_FIELD_COUNT][4] = {
- // Minimum Greatest Least Maximum
- // Minimum Maximum
- { 0, 0, 1, 1}, // ERA
- { 1, 1, 140742, 144683}, // YEAR
- { 0, 0, 11, 11}, // MONTH
- { 1, 1, 52, 53}, // WEEK_OF_YEAR
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH
- { 1, 1, 28, 31}, // DAY_OF_MONTH
- { 1, 1, 365, 366}, // DAY_OF_YEAR
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK
- { -1, -1, 4, 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
- { -140742, -140742, 140742, 144683}, // YEAR_WOY
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL
- { -140742, -140742, 140742, 144683}, // 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
-};
-
-/*
-* <pre>
-* Greatest Least
-* Field name Minimum Minimum Maximum Maximum
-* ---------- ------- ------- ------- -------
-* ERA 0 0 1 1
-* YEAR 1 1 140742 144683
-* MONTH 0 0 11 11
-* WEEK_OF_YEAR 1 1 52 53
-* WEEK_OF_MONTH 0 0 4 6
-* DAY_OF_MONTH 1 1 28 31
-* DAY_OF_YEAR 1 1 365 366
-* DAY_OF_WEEK 1 1 7 7
-* DAY_OF_WEEK_IN_MONTH -1 -1 4 5
-* AM_PM 0 0 1 1
-* HOUR 0 0 11 11
-* HOUR_OF_DAY 0 0 23 23
-* MINUTE 0 0 59 59
-* SECOND 0 0 59 59
-* MILLISECOND 0 0 999 999
-* ZONE_OFFSET -12* -12* 12* 12*
-* DST_OFFSET 0 0 1* 1*
-* YEAR_WOY 1 1 140742 144683
-* DOW_LOCAL 1 1 7 7
-* </pre>
-* (*) In units of one-hour
-*/
-
-#if defined( U_DEBUG_CALSVC ) || defined (U_DEBUG_CAL)
-#include <stdio.h>
-#endif
-
-U_NAMESPACE_BEGIN
-
-UOBJECT_DEFINE_RTTI_IMPLEMENTATION(GregorianCalendar)
-
-// 00:00:00 UTC, October 15, 1582, expressed in ms from the epoch.
-// Note that only Italy and other Catholic countries actually
-// observed this cutover. Most other countries followed in
-// the next few centuries, some as late as 1928. [LIU]
-// in Java, -12219292800000L
-//const UDate GregorianCalendar::kPapalCutover = -12219292800000L;
-static const uint32_t kCutoverJulianDay = 2299161;
-static const UDate kPapalCutover = (2299161.0 - kEpochStartAsJulianDay) * U_MILLIS_PER_DAY;
-//static const UDate kPapalCutoverJulian = (2299161.0 - kEpochStartAsJulianDay);
-
-// -------------------------------------
-
-GregorianCalendar::GregorianCalendar(UErrorCode& status)
-: Calendar(status),
-fGregorianCutover(kPapalCutover),
-fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
-fIsGregorian(TRUE), fInvertGregorian(FALSE)
-{
- setTimeInMillis(getNow(), status);
-}
-
-// -------------------------------------
-
-GregorianCalendar::GregorianCalendar(TimeZone* zone, UErrorCode& status)
-: Calendar(zone, Locale::getDefault(), status),
-fGregorianCutover(kPapalCutover),
-fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
-fIsGregorian(TRUE), fInvertGregorian(FALSE)
-{
- setTimeInMillis(getNow(), status);
-}
-
-// -------------------------------------
-
-GregorianCalendar::GregorianCalendar(const TimeZone& zone, UErrorCode& status)
-: Calendar(zone, Locale::getDefault(), status),
-fGregorianCutover(kPapalCutover),
-fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
-fIsGregorian(TRUE), fInvertGregorian(FALSE)
-{
- setTimeInMillis(getNow(), status);
-}
-
-// -------------------------------------
-
-GregorianCalendar::GregorianCalendar(const Locale& aLocale, UErrorCode& status)
-: Calendar(TimeZone::createDefault(), aLocale, status),
-fGregorianCutover(kPapalCutover),
-fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
-fIsGregorian(TRUE), fInvertGregorian(FALSE)
-{
- setTimeInMillis(getNow(), status);
-}
-
-// -------------------------------------
-
-GregorianCalendar::GregorianCalendar(TimeZone* zone, const Locale& aLocale,
- UErrorCode& status)
- : Calendar(zone, aLocale, status),
- fGregorianCutover(kPapalCutover),
- fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
- fIsGregorian(TRUE), fInvertGregorian(FALSE)
-{
- setTimeInMillis(getNow(), status);
-}
-
-// -------------------------------------
-
-GregorianCalendar::GregorianCalendar(const TimeZone& zone, const Locale& aLocale,
- UErrorCode& status)
- : Calendar(zone, aLocale, status),
- fGregorianCutover(kPapalCutover),
- fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
- fIsGregorian(TRUE), fInvertGregorian(FALSE)
-{
- setTimeInMillis(getNow(), status);
-}
-
-// -------------------------------------
-
-GregorianCalendar::GregorianCalendar(int32_t year, int32_t month, int32_t date,
- UErrorCode& status)
- : Calendar(TimeZone::createDefault(), Locale::getDefault(), status),
- fGregorianCutover(kPapalCutover),
- fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
- fIsGregorian(TRUE), fInvertGregorian(FALSE)
-{
- set(UCAL_ERA, AD);
- set(UCAL_YEAR, year);
- set(UCAL_MONTH, month);
- set(UCAL_DATE, date);
-}
-
-// -------------------------------------
-
-GregorianCalendar::GregorianCalendar(int32_t year, int32_t month, int32_t date,
- int32_t hour, int32_t minute, UErrorCode& status)
- : Calendar(TimeZone::createDefault(), Locale::getDefault(), status),
- fGregorianCutover(kPapalCutover),
- fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
- fIsGregorian(TRUE), fInvertGregorian(FALSE)
-{
- set(UCAL_ERA, AD);
- set(UCAL_YEAR, year);
- set(UCAL_MONTH, month);
- set(UCAL_DATE, date);
- set(UCAL_HOUR_OF_DAY, hour);
- set(UCAL_MINUTE, minute);
-}
-
-// -------------------------------------
-
-GregorianCalendar::GregorianCalendar(int32_t year, int32_t month, int32_t date,
- int32_t hour, int32_t minute, int32_t second,
- UErrorCode& status)
- : Calendar(TimeZone::createDefault(), Locale::getDefault(), status),
- fGregorianCutover(kPapalCutover),
- fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
- fIsGregorian(TRUE), fInvertGregorian(FALSE)
-{
- set(UCAL_ERA, AD);
- set(UCAL_YEAR, year);
- set(UCAL_MONTH, month);
- set(UCAL_DATE, date);
- set(UCAL_HOUR_OF_DAY, hour);
- set(UCAL_MINUTE, minute);
- set(UCAL_SECOND, second);
-}
-
-// -------------------------------------
-
-GregorianCalendar::~GregorianCalendar()
-{
-}
-
-// -------------------------------------
-
-GregorianCalendar::GregorianCalendar(const GregorianCalendar &source)
-: Calendar(source),
-fGregorianCutover(source.fGregorianCutover),
-fCutoverJulianDay(source.fCutoverJulianDay), fNormalizedGregorianCutover(source.fNormalizedGregorianCutover), fGregorianCutoverYear(source.fGregorianCutoverYear),
-fIsGregorian(source.fIsGregorian), fInvertGregorian(source.fInvertGregorian)
-{
-}
-
-// -------------------------------------
-
-Calendar* GregorianCalendar::clone() const
-{
- return new GregorianCalendar(*this);
-}
-
-// -------------------------------------
-
-GregorianCalendar &
-GregorianCalendar::operator=(const GregorianCalendar &right)
-{
- if (this != &right)
- {
- Calendar::operator=(right);
- fGregorianCutover = right.fGregorianCutover;
- fNormalizedGregorianCutover = right.fNormalizedGregorianCutover;
- fGregorianCutoverYear = right.fGregorianCutoverYear;
- fCutoverJulianDay = right.fCutoverJulianDay;
- }
- return *this;
-}
-
-// -------------------------------------
-
-UBool GregorianCalendar::isEquivalentTo(const Calendar& other) const
-{
- // Calendar override.
- return Calendar::isEquivalentTo(other) &&
- fGregorianCutover == ((GregorianCalendar*)&other)->fGregorianCutover;
-}
-
-// -------------------------------------
-
-void
-GregorianCalendar::setGregorianChange(UDate date, UErrorCode& status)
-{
- if (U_FAILURE(status))
- return;
-
- fGregorianCutover = date;
-
- // Precompute two internal variables which we use to do the actual
- // cutover computations. These are the normalized cutover, which is the
- // midnight at or before the cutover, and the cutover year. The
- // normalized cutover is in pure date milliseconds; it contains no time
- // of day or timezone component, and it used to compare against other
- // pure date values.
- int32_t cutoverDay = (int32_t)ClockMath::floorDivide(fGregorianCutover, (double)kOneDay);
- fNormalizedGregorianCutover = cutoverDay * kOneDay;
-
- // Handle the rare case of numeric overflow. If the user specifies a
- // change of UDate(Long.MIN_VALUE), in order to get a pure Gregorian
- // calendar, then the epoch day is -106751991168, which when multiplied
- // by ONE_DAY gives 9223372036794351616 -- the negative value is too
- // large for 64 bits, and overflows into a positive value. We correct
- // this by using the next day, which for all intents is semantically
- // equivalent.
- if (cutoverDay < 0 && fNormalizedGregorianCutover > 0) {
- fNormalizedGregorianCutover = (cutoverDay + 1) * kOneDay;
- }
-
- // Normalize the year so BC values are represented as 0 and negative
- // values.
- GregorianCalendar *cal = new GregorianCalendar(getTimeZone(), status);
- /* test for NULL */
- if (cal == 0) {
- status = U_MEMORY_ALLOCATION_ERROR;
- return;
- }
- if(U_FAILURE(status))
- return;
- cal->setTime(date, status);
- fGregorianCutoverYear = cal->get(UCAL_YEAR, status);
- if (cal->get(UCAL_ERA, status) == BC)
- fGregorianCutoverYear = 1 - fGregorianCutoverYear;
- fCutoverJulianDay = cutoverDay;
- delete cal;
-}
-
-
-void GregorianCalendar::handleComputeFields(int32_t julianDay, UErrorCode& status) {
- int32_t eyear, month, dayOfMonth, dayOfYear, unusedRemainder;
-
-
- if(U_FAILURE(status)) {
- return;
- }
-
-#if defined (U_DEBUG_CAL)
- fprintf(stderr, "%s:%d: jd%d- (greg's %d)- [cut=%d]\n",
- __FILE__, __LINE__, julianDay, getGregorianDayOfYear(), fCutoverJulianDay);
-#endif
-
-
- if (julianDay >= fCutoverJulianDay) {
- month = getGregorianMonth();
- dayOfMonth = getGregorianDayOfMonth();
- dayOfYear = getGregorianDayOfYear();
- eyear = getGregorianYear();
- } else {
- // The Julian epoch day (not the same as Julian Day)
- // is zero on Saturday December 30, 0 (Gregorian).
- int32_t julianEpochDay = julianDay - (kJan1_1JulianDay - 2);
- eyear = (int32_t) ClockMath::floorDivide((4.0*julianEpochDay) + 1464.0, (int32_t) 1461, unusedRemainder);
-
- // Compute the Julian calendar day number for January 1, eyear
- int32_t january1 = 365*(eyear-1) + ClockMath::floorDivide(eyear-1, (int32_t)4);
- dayOfYear = (julianEpochDay - january1); // 0-based
-
- // Julian leap years occurred historically every 4 years starting
- // with 8 AD. Before 8 AD the spacing is irregular; every 3 years
- // from 45 BC to 9 BC, and then none until 8 AD. However, we don't
- // implement this historical detail; instead, we implement the
- // computatinally cleaner proleptic calendar, which assumes
- // consistent 4-year cycles throughout time.
- UBool isLeap = ((eyear&0x3) == 0); // equiv. to (eyear%4 == 0)
-
- // Common Julian/Gregorian calculation
- int32_t correction = 0;
- int32_t march1 = isLeap ? 60 : 59; // zero-based DOY for March 1
- if (dayOfYear >= march1) {
- correction = isLeap ? 1 : 2;
- }
- month = (12 * (dayOfYear + correction) + 6) / 367; // zero-based month
- dayOfMonth = dayOfYear - (isLeap?kLeapNumDays[month]:kNumDays[month]) + 1; // one-based DOM
- ++dayOfYear;
-#if defined (U_DEBUG_CAL)
- // fprintf(stderr, "%d - %d[%d] + 1\n", dayOfYear, isLeap?kLeapNumDays[month]:kNumDays[month], month );
- // fprintf(stderr, "%s:%d: greg's HCF %d -> %d/%d/%d not %d/%d/%d\n",
- // __FILE__, __LINE__,julianDay,
- // eyear,month,dayOfMonth,
- // getGregorianYear(), getGregorianMonth(), getGregorianDayOfMonth() );
- fprintf(stderr, "%s:%d: doy %d (greg's %d)- [cut=%d]\n",
- __FILE__, __LINE__, dayOfYear, getGregorianDayOfYear(), fCutoverJulianDay);
-#endif
-
- }
-
- // [j81] if we are after the cutover in its year, shift the day of the year
- if((eyear == fGregorianCutoverYear) && (julianDay >= fCutoverJulianDay)) {
- //from handleComputeMonthStart
- int32_t gregShift = Grego::gregorianShift(eyear);
-#if defined (U_DEBUG_CAL)
- fprintf(stderr, "%s:%d: gregorian shift %d ::: doy%d => %d [cut=%d]\n",
- __FILE__, __LINE__,gregShift, dayOfYear, dayOfYear+gregShift, fCutoverJulianDay);
-#endif
- dayOfYear += gregShift;
- }
-
- internalSet(UCAL_MONTH, month);
- internalSet(UCAL_DAY_OF_MONTH, dayOfMonth);
- internalSet(UCAL_DAY_OF_YEAR, dayOfYear);
- internalSet(UCAL_EXTENDED_YEAR, eyear);
- int32_t era = AD;
- if (eyear < 1) {
- era = BC;
- eyear = 1 - eyear;
- }
- internalSet(UCAL_ERA, era);
- internalSet(UCAL_YEAR, eyear);
-}
-
-
-// -------------------------------------
-
-UDate
-GregorianCalendar::getGregorianChange() const
-{
- return fGregorianCutover;
-}
-
-// -------------------------------------
-
-UBool
-GregorianCalendar::isLeapYear(int32_t year) const
-{
- // MSVC complains bitterly if we try to use Grego::isLeapYear here
- // NOTE: year&0x3 == year%4
- return (year >= fGregorianCutoverYear ?
- (((year&0x3) == 0) && ((year%100 != 0) || (year%400 == 0))) : // Gregorian
- ((year&0x3) == 0)); // Julian
-}
-
-// -------------------------------------
-
-int32_t GregorianCalendar::handleComputeJulianDay(UCalendarDateFields bestField)
-{
- fInvertGregorian = FALSE;
-
- int32_t jd = Calendar::handleComputeJulianDay(bestField);
-
- if((bestField == UCAL_WEEK_OF_YEAR) && // if we are doing WOY calculations, we are counting relative to Jan 1 *julian*
- (internalGet(UCAL_EXTENDED_YEAR)==fGregorianCutoverYear) &&
- jd >= fCutoverJulianDay) {
- fInvertGregorian = TRUE; // So that the Julian Jan 1 will be used in handleComputeMonthStart
- return Calendar::handleComputeJulianDay(bestField);
- }
-
-
- // The following check handles portions of the cutover year BEFORE the
- // cutover itself happens.
- //if ((fIsGregorian==TRUE) != (jd >= fCutoverJulianDay)) { /* cutoverJulianDay)) { */
- if ((fIsGregorian==TRUE) != (jd >= fCutoverJulianDay)) { /* cutoverJulianDay)) { */
-#if defined (U_DEBUG_CAL)
- fprintf(stderr, "%s:%d: jd [invert] %d\n",
- __FILE__, __LINE__, jd);
-#endif
- fInvertGregorian = TRUE;
- jd = Calendar::handleComputeJulianDay(bestField);
-#if defined (U_DEBUG_CAL)
- fprintf(stderr, "%s:%d: fIsGregorian %s, fInvertGregorian %s - ",
- __FILE__, __LINE__,fIsGregorian?"T":"F", fInvertGregorian?"T":"F");
- fprintf(stderr, " jd NOW %d\n",
- jd);
-#endif
- } else {
-#if defined (U_DEBUG_CAL)
- fprintf(stderr, "%s:%d: jd [==] %d - %sfIsGregorian %sfInvertGregorian, %d\n",
- __FILE__, __LINE__, jd, fIsGregorian?"T":"F", fInvertGregorian?"T":"F", bestField);
-#endif
- }
-
- if(fIsGregorian && (internalGet(UCAL_EXTENDED_YEAR) == fGregorianCutoverYear)) {
- int32_t gregShift = Grego::gregorianShift(internalGet(UCAL_EXTENDED_YEAR));
- if (bestField == UCAL_DAY_OF_YEAR) {
-#if defined (U_DEBUG_CAL)
- fprintf(stderr, "%s:%d: [DOY%d] gregorian shift of JD %d += %d\n",
- __FILE__, __LINE__, fFields[bestField],jd, gregShift);
-#endif
- jd -= gregShift;
- } else if ( bestField == UCAL_WEEK_OF_MONTH ) {
- int32_t weekShift = 14;
-#if defined (U_DEBUG_CAL)
- fprintf(stderr, "%s:%d: [WOY/WOM] gregorian week shift of %d += %d\n",
- __FILE__, __LINE__, jd, weekShift);
-#endif
- jd += weekShift; // shift by weeks for week based fields.
- }
- }
-
- return jd;
-}
-
-int32_t GregorianCalendar::handleComputeMonthStart(int32_t eyear, int32_t month,
-
- UBool /* useMonth */) const
-{
- GregorianCalendar *nonConstThis = (GregorianCalendar*)this; // cast away const
-
- // If the month is out of range, adjust it into range, and
- // modify the extended year value accordingly.
- if (month < 0 || month > 11) {
- eyear += ClockMath::floorDivide(month, 12, month);
- }
-
- UBool isLeap = eyear%4 == 0;
- int64_t y = (int64_t)eyear-1;
- int64_t julianDay = 365*y + ClockMath::floorDivide(y, (int64_t)4) + (kJan1_1JulianDay - 3);
-
- nonConstThis->fIsGregorian = (eyear >= fGregorianCutoverYear);
-#if defined (U_DEBUG_CAL)
- fprintf(stderr, "%s:%d: (hcms%d/%d) fIsGregorian %s, fInvertGregorian %s\n",
- __FILE__, __LINE__, eyear,month, fIsGregorian?"T":"F", fInvertGregorian?"T":"F");
-#endif
- if (fInvertGregorian) {
- nonConstThis->fIsGregorian = !fIsGregorian;
- }
- if (fIsGregorian) {
- isLeap = isLeap && ((eyear%100 != 0) || (eyear%400 == 0));
- // Add 2 because Gregorian calendar starts 2 days after
- // Julian calendar
- int32_t gregShift = Grego::gregorianShift(eyear);
-#if defined (U_DEBUG_CAL)
- fprintf(stderr, "%s:%d: (hcms%d/%d) gregorian shift of %d += %d\n",
- __FILE__, __LINE__, eyear, month, julianDay, gregShift);
-#endif
- julianDay += gregShift;
- }
-
- // At this point julianDay indicates the day BEFORE the first
- // day of January 1, <eyear> of either the Julian or Gregorian
- // calendar.
-
- if (month != 0) {
- julianDay += isLeap?kLeapNumDays[month]:kNumDays[month];
- }
-
- return static_cast<int32_t>(julianDay);
-}
-
-int32_t GregorianCalendar::handleGetMonthLength(int32_t extendedYear, int32_t month) const
-{
- // If the month is out of range, adjust it into range, and
- // modify the extended year value accordingly.
- if (month < 0 || month > 11) {
- extendedYear += ClockMath::floorDivide(month, 12, month);
- }
-
- return isLeapYear(extendedYear) ? kLeapMonthLength[month] : kMonthLength[month];
-}
-
-int32_t GregorianCalendar::handleGetYearLength(int32_t eyear) const {
- return isLeapYear(eyear) ? 366 : 365;
-}
-
-
-int32_t
-GregorianCalendar::monthLength(int32_t month) const
-{
- int32_t year = internalGet(UCAL_EXTENDED_YEAR);
- return handleGetMonthLength(year, month);
-}
-
-// -------------------------------------
-
-int32_t
-GregorianCalendar::monthLength(int32_t month, int32_t year) const
-{
- return isLeapYear(year) ? kLeapMonthLength[month] : kMonthLength[month];
-}
-
-// -------------------------------------
-
-int32_t
-GregorianCalendar::yearLength(int32_t year) const
-{
- return isLeapYear(year) ? 366 : 365;
-}
-
-// -------------------------------------
-
-int32_t
-GregorianCalendar::yearLength() const
-{
- return isLeapYear(internalGet(UCAL_YEAR)) ? 366 : 365;
-}
-
-// -------------------------------------
-
-/**
-* After adjustments such as add(MONTH), add(YEAR), we don't want the
-* month to jump around. E.g., we don't want Jan 31 + 1 month to go to Mar
-* 3, we want it to go to Feb 28. Adjustments which might run into this
-* problem call this method to retain the proper month.
-*/
-void
-GregorianCalendar::pinDayOfMonth()
-{
- int32_t monthLen = monthLength(internalGet(UCAL_MONTH));
- int32_t dom = internalGet(UCAL_DATE);
- if(dom > monthLen)
- set(UCAL_DATE, monthLen);
-}
-
-// -------------------------------------
-
-
-UBool
-GregorianCalendar::validateFields() const
-{
- for (int32_t field = 0; field < UCAL_FIELD_COUNT; field++) {
- // Ignore DATE and DAY_OF_YEAR which are handled below
- if (field != UCAL_DATE &&
- field != UCAL_DAY_OF_YEAR &&
- isSet((UCalendarDateFields)field) &&
- ! boundsCheck(internalGet((UCalendarDateFields)field), (UCalendarDateFields)field))
- return FALSE;
- }
-
- // Values differ in Least-Maximum and Maximum should be handled
- // specially.
- if (isSet(UCAL_DATE)) {
- int32_t date = internalGet(UCAL_DATE);
- if (date < getMinimum(UCAL_DATE) ||
- date > monthLength(internalGet(UCAL_MONTH))) {
- return FALSE;
- }
- }
-
- if (isSet(UCAL_DAY_OF_YEAR)) {
- int32_t days = internalGet(UCAL_DAY_OF_YEAR);
- if (days < 1 || days > yearLength()) {
- return FALSE;
- }
- }
-
- // Handle DAY_OF_WEEK_IN_MONTH, which must not have the value zero.
- // We've checked against minimum and maximum above already.
- if (isSet(UCAL_DAY_OF_WEEK_IN_MONTH) &&
- 0 == internalGet(UCAL_DAY_OF_WEEK_IN_MONTH)) {
- return FALSE;
- }
-
- return TRUE;
-}
-
-// -------------------------------------
-
-UBool
-GregorianCalendar::boundsCheck(int32_t value, UCalendarDateFields field) const
-{
- return value >= getMinimum(field) && value <= getMaximum(field);
-}
-
-// -------------------------------------
-
-UDate
-GregorianCalendar::getEpochDay(UErrorCode& status)
-{
- complete(status);
- // Divide by 1000 (convert to seconds) in order to prevent overflow when
- // dealing with UDate(Long.MIN_VALUE) and UDate(Long.MAX_VALUE).
- double wallSec = internalGetTime()/1000 + (internalGet(UCAL_ZONE_OFFSET) + internalGet(UCAL_DST_OFFSET))/1000;
-
- return ClockMath::floorDivide(wallSec, kOneDay/1000.0);
-}
-
-// -------------------------------------
-
-
-// -------------------------------------
-
-/**
-* Compute the julian day number of the day BEFORE the first day of
-* January 1, year 1 of the given calendar. If julianDay == 0, it
-* specifies (Jan. 1, 1) - 1, in whatever calendar we are using (Julian
-* or Gregorian).
-*/
-double GregorianCalendar::computeJulianDayOfYear(UBool isGregorian,
- int32_t year, UBool& isLeap)
-{
- isLeap = year%4 == 0;
- int32_t y = year - 1;
- double julianDay = 365.0*y + ClockMath::floorDivide(y, 4) + (kJan1_1JulianDay - 3);
-
- if (isGregorian) {
- isLeap = isLeap && ((year%100 != 0) || (year%400 == 0));
- // Add 2 because Gregorian calendar starts 2 days after Julian calendar
- julianDay += Grego::gregorianShift(year);
- }
-
- return julianDay;
-}
-
-// /**
-// * Compute the day of week, relative to the first day of week, from
-// * 0..6, of the current DOW_LOCAL or DAY_OF_WEEK fields. This is
-// * equivalent to get(DOW_LOCAL) - 1.
-// */
-// int32_t GregorianCalendar::computeRelativeDOW() const {
-// int32_t relDow = 0;
-// if (fStamp[UCAL_DOW_LOCAL] > fStamp[UCAL_DAY_OF_WEEK]) {
-// relDow = internalGet(UCAL_DOW_LOCAL) - 1; // 1-based
-// } else if (fStamp[UCAL_DAY_OF_WEEK] != kUnset) {
-// relDow = internalGet(UCAL_DAY_OF_WEEK) - getFirstDayOfWeek();
-// if (relDow < 0) relDow += 7;
-// }
-// return relDow;
-// }
-
-// /**
-// * Compute the day of week, relative to the first day of week,
-// * from 0..6 of the given julian day.
-// */
-// int32_t GregorianCalendar::computeRelativeDOW(double julianDay) const {
-// int32_t relDow = julianDayToDayOfWeek(julianDay) - getFirstDayOfWeek();
-// if (relDow < 0) {
-// relDow += 7;
-// }
-// return relDow;
-// }
-
-// /**
-// * Compute the DOY using the WEEK_OF_YEAR field and the julian day
-// * of the day BEFORE January 1 of a year (a return value from
-// * computeJulianDayOfYear).
-// */
-// int32_t GregorianCalendar::computeDOYfromWOY(double julianDayOfYear) const {
-// // Compute DOY from day of week plus week of year
-
-// // Find the day of the week for the first of this year. This
-// // is zero-based, with 0 being the locale-specific first day of
-// // the week. Add 1 to get first day of year.
-// int32_t fdy = computeRelativeDOW(julianDayOfYear + 1);
-
-// return
-// // Compute doy of first (relative) DOW of WOY 1
-// (((7 - fdy) < getMinimalDaysInFirstWeek())
-// ? (8 - fdy) : (1 - fdy))
-
-// // Adjust for the week number.
-// + (7 * (internalGet(UCAL_WEEK_OF_YEAR) - 1))
-
-// // Adjust for the DOW
-// + computeRelativeDOW();
-// }
-
-// -------------------------------------
-
-double
-GregorianCalendar::millisToJulianDay(UDate millis)
-{
- return (double)kEpochStartAsJulianDay + ClockMath::floorDivide(millis, (double)kOneDay);
-}
-
-// -------------------------------------
-
-UDate
-GregorianCalendar::julianDayToMillis(double julian)
-{
- return (UDate) ((julian - kEpochStartAsJulianDay) * (double) kOneDay);
-}
-
-// -------------------------------------
-
-int32_t
-GregorianCalendar::aggregateStamp(int32_t stamp_a, int32_t stamp_b)
-{
- return (((stamp_a != kUnset && stamp_b != kUnset)
- ? uprv_max(stamp_a, stamp_b)
- : (int32_t)kUnset));
-}
-
-// -------------------------------------
-
-/**
-* Roll a field by a signed amount.
-* Note: This will be made public later. [LIU]
-*/
-
-void
-GregorianCalendar::roll(EDateFields field, int32_t amount, UErrorCode& status) {
- roll((UCalendarDateFields) field, amount, status);
-}
-
-void
-GregorianCalendar::roll(UCalendarDateFields field, int32_t amount, UErrorCode& status)
-{
- if((amount == 0) || U_FAILURE(status)) {
- return;
- }
-
- // J81 processing. (gregorian cutover)
- UBool inCutoverMonth = FALSE;
- int32_t cMonthLen=0; // 'c' for cutover; in days
- int32_t cDayOfMonth=0; // no discontinuity: [0, cMonthLen)
- double cMonthStart=0.0; // in ms
-
- // Common code - see if we're in the cutover month of the cutover year
- if(get(UCAL_EXTENDED_YEAR, status) == fGregorianCutoverYear) {
- switch (field) {
- case UCAL_DAY_OF_MONTH:
- case UCAL_WEEK_OF_MONTH:
- {
- int32_t max = monthLength(internalGet(UCAL_MONTH));
- UDate t = internalGetTime();
- // We subtract 1 from the DAY_OF_MONTH to make it zero-based, and an
- // additional 10 if we are after the cutover. Thus the monthStart
- // value will be correct iff we actually are in the cutover month.
- cDayOfMonth = internalGet(UCAL_DAY_OF_MONTH) - ((t >= fGregorianCutover) ? 10 : 0);
- cMonthStart = t - ((cDayOfMonth - 1) * kOneDay);
- // A month containing the cutover is 10 days shorter.
- if ((cMonthStart < fGregorianCutover) &&
- (cMonthStart + (cMonthLen=(max-10))*kOneDay >= fGregorianCutover)) {
- inCutoverMonth = TRUE;
- }
- }
- break;
- default:
- ;
- }
- }
-
- switch (field) {
- case UCAL_WEEK_OF_YEAR: {
- // Unlike WEEK_OF_MONTH, WEEK_OF_YEAR never shifts the day of the
- // week. Also, rolling the week of the year can have seemingly
- // strange effects simply because the year of the week of year
- // may be different from the calendar year. For example, the
- // date Dec 28, 1997 is the first day of week 1 of 1998 (if
- // weeks start on Sunday and the minimal days in first week is
- // <= 3).
- int32_t woy = get(UCAL_WEEK_OF_YEAR, status);
- // Get the ISO year, which matches the week of year. This
- // may be one year before or after the calendar year.
- int32_t isoYear = get(UCAL_YEAR_WOY, status);
- int32_t isoDoy = internalGet(UCAL_DAY_OF_YEAR);
- if (internalGet(UCAL_MONTH) == UCAL_JANUARY) {
- if (woy >= 52) {
- isoDoy += handleGetYearLength(isoYear);
- }
- } else {
- if (woy == 1) {
- isoDoy -= handleGetYearLength(isoYear - 1);
- }
- }
- woy += amount;
- // Do fast checks to avoid unnecessary computation:
- if (woy < 1 || woy > 52) {
- // Determine the last week of the ISO year.
- // We do this using the standard formula we use
- // everywhere in this file. If we can see that the
- // days at the end of the year are going to fall into
- // week 1 of the next year, we drop the last week by
- // subtracting 7 from the last day of the year.
- int32_t lastDoy = handleGetYearLength(isoYear);
- int32_t lastRelDow = (lastDoy - isoDoy + internalGet(UCAL_DAY_OF_WEEK) -
- getFirstDayOfWeek()) % 7;
- if (lastRelDow < 0) lastRelDow += 7;
- if ((6 - lastRelDow) >= getMinimalDaysInFirstWeek()) lastDoy -= 7;
- int32_t lastWoy = weekNumber(lastDoy, lastRelDow + 1);
- woy = ((woy + lastWoy - 1) % lastWoy) + 1;
- }
- set(UCAL_WEEK_OF_YEAR, woy);
- set(UCAL_YEAR_WOY,isoYear);
- return;
- }
-
- case UCAL_DAY_OF_MONTH:
- if( !inCutoverMonth ) {
- Calendar::roll(field, amount, status);
- return;
- } else {
- // [j81] 1582 special case for DOM
- // The default computation works except when the current month
- // contains the Gregorian cutover. We handle this special case
- // here. [j81 - aliu]
- double monthLen = cMonthLen * kOneDay;
- double msIntoMonth = uprv_fmod(internalGetTime() - cMonthStart +
- amount * kOneDay, monthLen);
- if (msIntoMonth < 0) {
- msIntoMonth += monthLen;
- }
-#if defined (U_DEBUG_CAL)
- fprintf(stderr, "%s:%d: roll DOM %d -> %.0lf ms \n",
- __FILE__, __LINE__,amount, cMonthLen, cMonthStart+msIntoMonth);
-#endif
- setTimeInMillis(cMonthStart + msIntoMonth, status);
- return;
- }
-
- case UCAL_WEEK_OF_MONTH:
- if( !inCutoverMonth ) {
- Calendar::roll(field, amount, status);
- return;
- } else {
-#if defined (U_DEBUG_CAL)
- fprintf(stderr, "%s:%d: roll WOM %d ??????????????????? \n",
- __FILE__, __LINE__,amount);
-#endif
- // NOTE: following copied from the old
- // GregorianCalendar::roll( WEEK_OF_MONTH ) code
-
- // This is tricky, because during the roll we may have to shift
- // to a different day of the week. For example:
-
- // s m t w r f s
- // 1 2 3 4 5
- // 6 7 8 9 10 11 12
-
- // When rolling from the 6th or 7th back one week, we go to the
- // 1st (assuming that the first partial week counts). The same
- // thing happens at the end of the month.
-
- // The other tricky thing is that we have to figure out whether
- // the first partial week actually counts or not, based on the
- // minimal first days in the week. And we have to use the
- // correct first day of the week to delineate the week
- // boundaries.
-
- // Here's our algorithm. First, we find the real boundaries of
- // the month. Then we discard the first partial week if it
- // doesn't count in this locale. Then we fill in the ends with
- // phantom days, so that the first partial week and the last
- // partial week are full weeks. We then have a nice square
- // block of weeks. We do the usual rolling within this block,
- // as is done elsewhere in this method. If we wind up on one of
- // the phantom days that we added, we recognize this and pin to
- // the first or the last day of the month. Easy, eh?
-
- // Another wrinkle: To fix jitterbug 81, we have to make all this
- // work in the oddball month containing the Gregorian cutover.
- // This month is 10 days shorter than usual, and also contains
- // a discontinuity in the days; e.g., the default cutover month
- // is Oct 1582, and goes from day of month 4 to day of month 15.
-
- // Normalize the DAY_OF_WEEK so that 0 is the first day of the week
- // in this locale. We have dow in 0..6.
- int32_t dow = internalGet(UCAL_DAY_OF_WEEK) - getFirstDayOfWeek();
- if (dow < 0)
- dow += 7;
-
- // Find the day of month, compensating for cutover discontinuity.
- int32_t dom = cDayOfMonth;
-
- // Find the day of the week (normalized for locale) for the first
- // of the month.
- int32_t fdm = (dow - dom + 1) % 7;
- if (fdm < 0)
- fdm += 7;
-
- // Get the first day of the first full week of the month,
- // including phantom days, if any. Figure out if the first week
- // counts or not; if it counts, then fill in phantom days. If
- // not, advance to the first real full week (skip the partial week).
- int32_t start;
- if ((7 - fdm) < getMinimalDaysInFirstWeek())
- start = 8 - fdm; // Skip the first partial week
- else
- start = 1 - fdm; // This may be zero or negative
-
- // Get the day of the week (normalized for locale) for the last
- // day of the month.
- int32_t monthLen = cMonthLen;
- int32_t ldm = (monthLen - dom + dow) % 7;
- // We know monthLen >= DAY_OF_MONTH so we skip the += 7 step here.
-
- // Get the limit day for the blocked-off rectangular month; that
- // is, the day which is one past the last day of the month,
- // after the month has already been filled in with phantom days
- // to fill out the last week. This day has a normalized DOW of 0.
- int32_t limit = monthLen + 7 - ldm;
-
- // Now roll between start and (limit - 1).
- int32_t gap = limit - start;
- int32_t newDom = (dom + amount*7 - start) % gap;
- if (newDom < 0)
- newDom += gap;
- newDom += start;
-
- // Finally, pin to the real start and end of the month.
- if (newDom < 1)
- newDom = 1;
- if (newDom > monthLen)
- newDom = monthLen;
-
- // Set the DAY_OF_MONTH. We rely on the fact that this field
- // takes precedence over everything else (since all other fields
- // are also set at this point). If this fact changes (if the
- // disambiguation algorithm changes) then we will have to unset
- // the appropriate fields here so that DAY_OF_MONTH is attended
- // to.
-
- // If we are in the cutover month, manipulate ms directly. Don't do
- // this in general because it doesn't work across DST boundaries
- // (details, details). This takes care of the discontinuity.
- setTimeInMillis(cMonthStart + (newDom-1)*kOneDay, status);
- return;
- }
-
- default:
- Calendar::roll(field, amount, status);
- return;
- }
-}
-
-// -------------------------------------
-
-
-/**
-* Return the minimum value that this field could have, given the current date.
-* For the Gregorian calendar, this is the same as getMinimum() and getGreatestMinimum().
-* @param field the time field.
-* @return the minimum value that this field could have, given the current date.
-* @deprecated ICU 2.6. Use getActualMinimum(UCalendarDateFields field) instead.
-*/
-int32_t GregorianCalendar::getActualMinimum(EDateFields field) const
-{
- return getMinimum((UCalendarDateFields)field);
-}
-
-int32_t GregorianCalendar::getActualMinimum(EDateFields field, UErrorCode& /* status */) const
-{
- return getMinimum((UCalendarDateFields)field);
-}
-
-/**
-* Return the minimum value that this field could have, given the current date.
-* For the Gregorian calendar, this is the same as getMinimum() and getGreatestMinimum().
-* @param field the time field.
-* @return the minimum value that this field could have, given the current date.
-* @draft ICU 2.6.
-*/
-int32_t GregorianCalendar::getActualMinimum(UCalendarDateFields field, UErrorCode& /* status */) const
-{
- return getMinimum(field);
-}
-
-
-// ------------------------------------
-
-/**
-* Old year limits were least max 292269054, max 292278994.
-*/
-
-/**
-* @stable ICU 2.0
-*/
-int32_t GregorianCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const {
- return kGregorianCalendarLimits[field][limitType];
-}
-
-/**
-* Return the maximum value that this field could have, given the current date.
-* For example, with the date "Feb 3, 1997" and the DAY_OF_MONTH field, the actual
-* maximum would be 28; for "Feb 3, 1996" it s 29. Similarly for a Hebrew calendar,
-* for some years the actual maximum for MONTH is 12, and for others 13.
-* @stable ICU 2.0
-*/
-int32_t GregorianCalendar::getActualMaximum(UCalendarDateFields field, UErrorCode& status) const
-{
- /* It is a known limitation that the code here (and in getActualMinimum)
- * won't behave properly at the extreme limits of GregorianCalendar's
- * representable range (except for the code that handles the YEAR
- * field). That's because the ends of the representable range are at
- * odd spots in the year. For calendars with the default Gregorian
- * cutover, these limits are Sun Dec 02 16:47:04 GMT 292269055 BC to Sun
- * Aug 17 07:12:55 GMT 292278994 AD, somewhat different for non-GMT
- * zones. As a result, if the calendar is set to Aug 1 292278994 AD,
- * the actual maximum of DAY_OF_MONTH is 17, not 30. If the date is Mar
- * 31 in that year, the actual maximum month might be Jul, whereas is
- * the date is Mar 15, the actual maximum might be Aug -- depending on
- * the precise semantics that are desired. Similar considerations
- * affect all fields. Nonetheless, this effect is sufficiently arcane
- * that we permit it, rather than complicating the code to handle such
- * intricacies. - liu 8/20/98
-
- * UPDATE: No longer true, since we have pulled in the limit values on
- * the year. - Liu 11/6/00 */
-
- switch (field) {
-
- case UCAL_YEAR:
- /* The year computation is no different, in principle, from the
- * others, however, the range of possible maxima is large. In
- * addition, the way we know we've exceeded the range is different.
- * For these reasons, we use the special case code below to handle
- * this field.
- *
- * The actual maxima for YEAR depend on the type of calendar:
- *
- * Gregorian = May 17, 292275056 BC - Aug 17, 292278994 AD
- * Julian = Dec 2, 292269055 BC - Jan 3, 292272993 AD
- * Hybrid = Dec 2, 292269055 BC - Aug 17, 292278994 AD
- *
- * We know we've exceeded the maximum when either the month, date,
- * time, or era changes in response to setting the year. We don't
- * check for month, date, and time here because the year and era are
- * sufficient to detect an invalid year setting. NOTE: If code is
- * added to check the month and date in the future for some reason,
- * Feb 29 must be allowed to shift to Mar 1 when setting the year.
- */
- {
- if(U_FAILURE(status)) return 0;
- Calendar *cal = clone();
- if(!cal) {
- status = U_MEMORY_ALLOCATION_ERROR;
- return 0;
- }
-
- cal->setLenient(TRUE);
-
- int32_t era = cal->get(UCAL_ERA, status);
- UDate d = cal->getTime(status);
-
- /* Perform a binary search, with the invariant that lowGood is a
- * valid year, and highBad is an out of range year.
- */
- int32_t lowGood = kGregorianCalendarLimits[UCAL_YEAR][1];
- int32_t highBad = kGregorianCalendarLimits[UCAL_YEAR][2]+1;
- while ((lowGood + 1) < highBad) {
- int32_t y = (lowGood + highBad) / 2;
- cal->set(UCAL_YEAR, y);
- if (cal->get(UCAL_YEAR, status) == y && cal->get(UCAL_ERA, status) == era) {
- lowGood = y;
- } else {
- highBad = y;
- cal->setTime(d, status); // Restore original fields
- }
- }
-
- delete cal;
- return lowGood;
- }
-
- default:
- return Calendar::getActualMaximum(field,status);
- }
-}
-
-
-int32_t GregorianCalendar::handleGetExtendedYear() {
- // the year to return
- int32_t year = kEpochYear;
-
- // year field to use
- int32_t yearField = UCAL_EXTENDED_YEAR;
-
- // There are three separate fields which could be used to
- // derive the proper year. Use the one most recently set.
- if (fStamp[yearField] < fStamp[UCAL_YEAR])
- yearField = UCAL_YEAR;
- if (fStamp[yearField] < fStamp[UCAL_YEAR_WOY])
- yearField = UCAL_YEAR_WOY;
-
- // based on the "best" year field, get the year
- switch(yearField) {
- case UCAL_EXTENDED_YEAR:
- year = internalGet(UCAL_EXTENDED_YEAR, kEpochYear);
- break;
-
- case UCAL_YEAR:
- {
- // The year defaults to the epoch start, the era to AD
- int32_t era = internalGet(UCAL_ERA, AD);
- if (era == BC) {
- year = 1 - internalGet(UCAL_YEAR, 1); // Convert to extended year
- } else {
- year = internalGet(UCAL_YEAR, kEpochYear);
- }
- }
- break;
-
- case UCAL_YEAR_WOY:
- year = handleGetExtendedYearFromWeekFields(internalGet(UCAL_YEAR_WOY), internalGet(UCAL_WEEK_OF_YEAR));
-#if defined (U_DEBUG_CAL)
- // if(internalGet(UCAL_YEAR_WOY) != year) {
- fprintf(stderr, "%s:%d: hGEYFWF[%d,%d] -> %d\n",
- __FILE__, __LINE__,internalGet(UCAL_YEAR_WOY),internalGet(UCAL_WEEK_OF_YEAR),year);
- //}
-#endif
- break;
-
- default:
- year = kEpochYear;
- }
- return year;
-}
-
-int32_t GregorianCalendar::handleGetExtendedYearFromWeekFields(int32_t yearWoy, int32_t woy)
-{
- // convert year to extended form
- int32_t era = internalGet(UCAL_ERA, AD);
- if(era == BC) {
- yearWoy = 1 - yearWoy;
- }
- return Calendar::handleGetExtendedYearFromWeekFields(yearWoy, woy);
-}
-
-
-// -------------------------------------
-
-UBool
-GregorianCalendar::inDaylightTime(UErrorCode& status) const
-{
- if (U_FAILURE(status) || !getTimeZone().useDaylightTime())
- return FALSE;
-
- // Force an update of the state of the Calendar.
- ((GregorianCalendar*)this)->complete(status); // cast away const
-
- return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE);
-}
-
-// -------------------------------------
-
-/**
-* Return the ERA. We need a special method for this because the
-* default ERA is AD, but a zero (unset) ERA is BC.
-*/
-int32_t
-GregorianCalendar::internalGetEra() const {
- return isSet(UCAL_ERA) ? internalGet(UCAL_ERA) : (int32_t)AD;
-}
-
-const char *
-GregorianCalendar::getType() const {
- //static const char kGregorianType = "gregorian";
-
- return "gregorian";
-}
-
-/**
- * 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 GregorianCalendar::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;
- GregorianCalendar calendar(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 GregorianCalendar::defaultCenturyStart() const {
- // lazy-evaluate systemDefaultCenturyStart
- umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
- return gSystemDefaultCenturyStart;
-}
-
-int32_t GregorianCalendar::defaultCenturyStartYear() const {
- // lazy-evaluate systemDefaultCenturyStartYear
- umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
- return gSystemDefaultCenturyStartYear;
-}
-
-U_NAMESPACE_END
-
-#endif /* #if !UCONFIG_NO_FORMATTING */
-
-//eof