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icu/icu4c/source/i18n/hebrwcal.cpp
Frank Tang 255eb4ef3e ICU-23069 Fix Hebrew calendar calculation 
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2025-03-19 13:45:52 -07:00

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
* 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 "cstring.h"
#include "umutex.h"
#include <float.h>
#include "gregoimp.h" // ClockMath
#include "astro.h" // CalendarCache
#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
{ 0, 0, 11, 12}, // ORDINAL_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
};
// There are 235 months in 19 years cycle.
static const int32_t MONTHS_IN_CYCLE = 235;
static const int32_t YEARS_IN_CYCLE = 19;
static icu::CalendarCache *gCache = nullptr;
U_CDECL_BEGIN
static UBool calendar_hebrew_cleanup() {
delete gCache;
gCache = nullptr;
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::forLocaleOrDefault(aLocale), aLocale, success)
{
}
HebrewCalendar::~HebrewCalendar() {
}
const char *HebrewCalendar::getType() const {
return "hebrew";
}
HebrewCalendar* 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:
case UCAL_ORDINAL_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
int64_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;
// We know there are total 235 months in every 19 years. To speed
// up the iteration, we first fast forward in the multiple of 235
// months for 19 years before the iteration which check the leap year.
if (month >= MONTHS_IN_CYCLE) {
if (uprv_add32_overflow(year, (month / MONTHS_IN_CYCLE) * YEARS_IN_CYCLE, &year)) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
month %= MONTHS_IN_CYCLE;
}
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;
// We know there are total 235 months in every 19 years. To speed
// up the iteration, we first fast forward in the multiple of 235
// months for 19 years before the iteration which check the leap year.
if (month <= -MONTHS_IN_CYCLE) {
if (uprv_add32_overflow(year, (month / MONTHS_IN_CYCLE) * YEARS_IN_CYCLE, &year)) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
month %= MONTHS_IN_CYCLE;
}
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(static_cast<UCalendarDateFields>(field), amount, status);
}
namespace {
int32_t monthsInYear(int32_t year);
} // namespace
/**
* 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:
case UCAL_ORDINAL_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(static_cast<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;
namespace {
/**
* 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 startOfYear(int32_t year, UErrorCode &status)
{
ucln_i18n_registerCleanup(UCLN_I18N_HEBREW_CALENDAR, calendar_hebrew_cleanup);
int64_t day = CalendarCache::get(&gCache, year, status);
if(U_FAILURE(status)) {
return 0;
}
if (day == 0) {
// # of months before year
int64_t months = ClockMath::floorDivideInt64(
(235LL * static_cast<int64_t>(year) - 234LL), 19LL);
int64_t frac = months * MONTH_FRACT + BAHARAD; // Fractional part of day #
day = months * 29LL + 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);
} else if (wd == 1 && frac > 15*HOUR_PARTS+204 && !HebrewCalendar::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 && HebrewCalendar::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;
}
if (day > INT32_MAX || day < INT32_MIN) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
CalendarCache::put(&gCache, year, static_cast<int32_t>(day), status);
}
// Out of range value is alread rejected before putting into cache.
U_ASSERT(INT32_MIN <= day && day <= INT32_MAX);
return day;
}
int32_t daysInYear(int32_t eyear, UErrorCode& status) {
if (U_FAILURE(status)) {
return 0;
}
return startOfYear(eyear+1, status) - startOfYear(eyear, status);
}
/**
* 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 yearType(int32_t year, UErrorCode& status)
{
if (U_FAILURE(status)) {
return 0;
}
int32_t yearLength = daysInYear(year, status);
if (U_FAILURE(status)) {
return 0;
}
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;
}
} // namespace
//
/**
* 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;
int64_t x = (year*12LL + 17) % YEARS_IN_CYCLE;
return x >= ((x < 0) ? -7 : 12);
}
namespace{
int32_t monthsInYear(int32_t year) {
return HebrewCalendar::isLeapYear(year) ? 13 : 12;
}
} // namespace
//-------------------------------------------------------------------------
// 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, UErrorCode& status) const {
if(U_FAILURE(status)) {
return 0;
}
// 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
int32_t type = yearType(extendedYear, status);
if(U_FAILURE(status)) {
return 0;
}
return MONTH_LENGTH[month][type];
}
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, UErrorCode& status) const {
return daysInYear(eyear, status);
}
void HebrewCalendar::validateField(UCalendarDateFields field, UErrorCode &status) {
if ((field == UCAL_MONTH || field == UCAL_ORDINAL_MONTH)
&& !isLeapYear(handleGetExtendedYear(status)) && internalGetMonth(status) == ADAR_1) {
if (U_FAILURE(status)) {
return;
}
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) {
if (U_FAILURE(status)) {
return;
}
int32_t d = julianDay - 347997;
double m = ClockMath::floorDivide((d * static_cast<double>(DAY_PARTS)), static_cast<double>(MONTH_PARTS)); // Months (approx)
int32_t year = static_cast<int32_t>(ClockMath::floorDivide((19. * m + 234.), 235.) + 1.); // Years (approx)
int32_t ys = startOfYear(year, status); // 1st day of year
if (U_FAILURE(status)) {
return;
}
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);
if (U_FAILURE(status)) {
return;
}
dayOfYear = (d - ys);
}
// Now figure out which month we're in, and the date within that month
int32_t type = yearType(year, status);
if (U_FAILURE(status)) {
return;
}
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);
// Check out of bound year
int32_t min_year = handleGetLimit(UCAL_EXTENDED_YEAR, UCAL_LIMIT_MINIMUM);
if (year < min_year) {
if (!isLenient()) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
year = min_year;
}
int32_t max_year = handleGetLimit(UCAL_EXTENDED_YEAR, UCAL_LIMIT_MAXIMUM);
if (max_year < year) {
if (!isLenient()) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
year = max_year;
}
internalSet(UCAL_YEAR, year);
internalSet(UCAL_EXTENDED_YEAR, year);
int32_t ordinal_month = month;
if (!isLeap && ordinal_month > ADAR_1) {
ordinal_month--;
}
internalSet(UCAL_ORDINAL_MONTH, ordinal_month);
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(UErrorCode& status ) {
if (U_FAILURE(status)) {
return 0;
}
if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
return internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1
}
return internalGet(UCAL_YEAR, 1); // Default to year 1
}
/**
* Return JD of start of given month/year.
* @internal
*/
int64_t HebrewCalendar::handleComputeMonthStart(
int32_t eyear, int32_t month, UBool /*useMonth*/, UErrorCode& status) const {
if (U_FAILURE(status)) {
return 0;
}
// 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.
// The month could be in large value, we first roll 235 months to 19 years
// before the while loop.
if (month <= -MONTHS_IN_CYCLE || month >= MONTHS_IN_CYCLE) {
if (uprv_add32_overflow(eyear, (month / MONTHS_IN_CYCLE) * YEARS_IN_CYCLE, &eyear)) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
month %= MONTHS_IN_CYCLE;
}
while (month < 0) {
if (uprv_add32_overflow(eyear, -1, &eyear) ||
uprv_add32_overflow(month, monthsInYear(eyear), &month)) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
}
// Careful: allow 0..12 in all years
while (month > 12) {
if (uprv_add32_overflow(month, -monthsInYear(eyear), &month) ||
uprv_add32_overflow(eyear, 1, &eyear)) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
}
int64_t day = startOfYear(eyear, status);
if(U_FAILURE(status)) {
return 0;
}
if (month != 0) {
int32_t type = yearType(eyear, status);
if (U_FAILURE(status)) {
return 0;
}
if (isLeapYear(eyear)) {
day += LEAP_MONTH_START[month][type];
} else {
day += MONTH_START[month][type];
}
}
return day + 347997LL;
}
constexpr uint32_t kHebrewRelatedYearDiff = -3760;
int32_t HebrewCalendar::getRelatedYear(UErrorCode &status) const
{
int32_t year = get(UCAL_EXTENDED_YEAR, status);
if (U_FAILURE(status)) {
return 0;
}
return year + kHebrewRelatedYearDiff;
}
void HebrewCalendar::setRelatedYear(int32_t year)
{
// set extended year
set(UCAL_EXTENDED_YEAR, year - kHebrewRelatedYearDiff);
}
IMPL_SYSTEM_DEFAULT_CENTURY(HebrewCalendar, "@calendar=hebrew")
bool HebrewCalendar::inTemporalLeapYear(UErrorCode& status) const {
if (U_FAILURE(status)) {
return false;
}
int32_t eyear = get(UCAL_EXTENDED_YEAR, status);
if (U_FAILURE(status)) {
return false;
}
return isLeapYear(eyear);
}
static const char * const gTemporalMonthCodesForHebrew[] = {
"M01", "M02", "M03", "M04", "M05", "M05L", "M06",
"M07", "M08", "M09", "M10", "M11", "M12", nullptr
};
const char* HebrewCalendar::getTemporalMonthCode(UErrorCode& status) const {
int32_t month = get(UCAL_MONTH, status);
if (U_FAILURE(status)) {
return nullptr;
}
return gTemporalMonthCodesForHebrew[month];
}
void HebrewCalendar::setTemporalMonthCode(const char* code, UErrorCode& status )
{
if (U_FAILURE(status)) {
return;
}
int32_t len = static_cast<int32_t>(uprv_strlen(code));
if (len == 3 || len == 4) {
for (int m = 0; gTemporalMonthCodesForHebrew[m] != nullptr; m++) {
if (uprv_strcmp(code, gTemporalMonthCodesForHebrew[m]) == 0) {
set(UCAL_MONTH, m);
return;
}
}
}
status = U_ILLEGAL_ARGUMENT_ERROR;
}
int32_t HebrewCalendar::internalGetMonth(UErrorCode& status) const {
if (U_FAILURE(status)) {
return 0;
}
if (resolveFields(kMonthPrecedence) == UCAL_ORDINAL_MONTH) {
int32_t ordinalMonth = internalGet(UCAL_ORDINAL_MONTH);
HebrewCalendar* nonConstThis = const_cast<HebrewCalendar*>(this); // cast away const
int32_t year = nonConstThis->handleGetExtendedYear(status);
if (U_FAILURE(status)) {
return 0;
}
if (isLeapYear(year) || ordinalMonth <= ADAR_1) {
return ordinalMonth;
}
if (!uprv_add32_overflow(ordinalMonth, 1, &ordinalMonth)) {
return ordinalMonth;
}
}
return Calendar::internalGetMonth(status);
}
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(HebrewCalendar)
U_NAMESPACE_END
#endif // UCONFIG_NO_FORMATTING
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