/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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* This file incorporates work covered by the following license notice:
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* ownership. The ASF licenses this file to you under the Apache
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#include <math.h>
#include <stdio.h>
#include <calendar_jewish.hxx>
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::i18n;
using namespace ::com::sun::star::lang;
namespace i18npool {
// not used
//static UErrorCode status; // status is shared in all calls to Calendar, it has to be reset for each call.
Calendar_jewish::Calendar_jewish()
{
cCalendar = "com.sun.star.i18n.Calendar_jewish";
}
// The following C++ code is translated from the Lisp code in
// ``Calendrical Calculations'' by Nachum Dershowitz and Edward M. Reingold,
// Software---Practice & Experience, vol. 20, no. 9 (September, 1990),
// pp. 899--928.
// This code is in the public domain, but any use of it
// should acknowledge its source.
// https://web.archive.org/web/20010222054702/http://www.ntu.edu.sg/home/ayxyan/date1.txt
// Hebrew dates
const int HebrewEpoch = -1373429; // Absolute date of start of Hebrew calendar
// True if year is an Hebrew leap year
bool HebrewLeapYear(sal_Int32 year) {
return ((((7 * year) + 1) % 19) < 7);
}
// Last month of Hebrew year.
sal_Int32 LastMonthOfHebrewYear(sal_Int32 year) {
return (HebrewLeapYear(year)) ? 13 : 12;
}
// Number of days elapsed from the Sunday prior to the start of the
// Hebrew calendar to the mean conjunction of Tishri of Hebrew year.
sal_Int32 HebrewCalendarElapsedDays(sal_Int32 year) {
sal_Int32 MonthsElapsed =
(235 * ((year - 1) / 19)) // Months in complete cycles so far.
+ (12 * ((year - 1) % 19)) // Regular months in this cycle.
+ (7 * ((year - 1) % 19) + 1) / 19; // Leap months this cycle
sal_Int32 PartsElapsed = 204 + 793 * (MonthsElapsed % 1080);
int HoursElapsed =
5 + 12 * MonthsElapsed + 793 * (MonthsElapsed / 1080)
+ PartsElapsed / 1080;
sal_Int32 ConjunctionDay = 1 + 29 * MonthsElapsed + HoursElapsed / 24;
sal_Int32 ConjunctionParts = 1080 * (HoursElapsed % 24) + PartsElapsed % 1080;
sal_Int32 AlternativeDay;
if ((ConjunctionParts >= 19440) // If new moon is at or after midday,
|| (((ConjunctionDay % 7) == 2) // ...or is on a Tuesday...
&& (ConjunctionParts >= 9924) // at 9 hours, 204 parts or later...
&& !(HebrewLeapYear(year))) // ...of a common year,
|| (((ConjunctionDay % 7) == 1) // ...or is on a Monday at...
&& (ConjunctionParts >= 16789) // 15 hours, 589 parts or later...
&& (HebrewLeapYear(year - 1))))// at the end of a leap year
// Then postpone Rosh HaShanah one day
AlternativeDay = ConjunctionDay + 1;
else
AlternativeDay = ConjunctionDay;
if (((AlternativeDay % 7) == 0)// If Rosh HaShanah would occur on Sunday,
|| ((AlternativeDay % 7) == 3) // or Wednesday,
|| ((AlternativeDay % 7) == 5)) // or Friday
// Then postpone it one (more) day
return (1+ AlternativeDay);
else
return AlternativeDay;
}
// Number of days in Hebrew year.
sal_Int32 DaysInHebrewYear(sal_Int32 year) {
return ((HebrewCalendarElapsedDays(year + 1)) -
(HebrewCalendarElapsedDays(year)));
}
// True if Heshvan is long in Hebrew year.
bool LongHeshvan(sal_Int32 year) {
return ((DaysInHebrewYear(year) % 10) == 5);
}
// True if Kislev is short in Hebrew year.
bool ShortKislev(sal_Int32 year) {
return ((DaysInHebrewYear(year) % 10) == 3);
}
// Last day of month in Hebrew year.
sal_Int32 LastDayOfHebrewMonth(sal_Int32 month, sal_Int32 year) {
if ((month == 2)
|| (month == 4)
|| (month == 6)
|| ((month == 8) && !(LongHeshvan(year)))
|| ((month == 9) && ShortKislev(year))
|| (month == 10)
|| ((month == 12) && !(HebrewLeapYear(year)))
|| (month == 13))
return 29;
else
return 30;
}
class HebrewDate {
private:
sal_Int32 year; // 1...
sal_Int32 month; // 1..LastMonthOfHebrewYear(year)
sal_Int32 day; // 1..LastDayOfHebrewMonth(month, year)
public:
HebrewDate(sal_Int32 m, sal_Int32 d, sal_Int32 y) { month = m; day = d; year = y; }
explicit HebrewDate(sal_Int32 d) { // Computes the Hebrew date from the absolute date.
year = (d + HebrewEpoch) / 366; // Approximation from below.
// Search forward for year from the approximation.
while (d >= HebrewDate(7,1,year + 1).GetAbsoluteDate())
year++;
// Search forward for month from either Tishri or Nisan.
if (d < HebrewDate(1, 1, year).GetAbsoluteDate())
month = 7; // Start at Tishri
else
month = 1; // Start at Nisan
while (d > HebrewDate(month, (LastDayOfHebrewMonth(month,year)), year).GetAbsoluteDate())
month++;
// Calculate the day by subtraction.
day = d - HebrewDate(month, 1, year).GetAbsoluteDate() + 1;
}
int GetAbsoluteDate() const { // Computes the absolute date of Hebrew date.
sal_Int32 DayInYear = day; // Days so far this month.
if (month < 7) { // Before Tishri, so add days in prior months
// this year before and after Nisan.
sal_Int32 m = 7;
while (m <= (LastMonthOfHebrewYear(year))) {
DayInYear = DayInYear + LastDayOfHebrewMonth(m, year);
m++;
};
m = 1;
while (m < month) {
DayInYear = DayInYear + LastDayOfHebrewMonth(m, year);
m++;
}
}
else { // Add days in prior months this year
sal_Int32 m = 7;
while (m < month) {
DayInYear = DayInYear + LastDayOfHebrewMonth(m, year);
m++;
}
}
return (DayInYear +
(HebrewCalendarElapsedDays(year)// Days in prior years.
+ HebrewEpoch)); // Days elapsed before absolute date 1.
}
sal_Int32 GetMonth() const { return month; }
sal_Int32 GetDay() const { return day; }
sal_Int32 GetYear() const { return year; }
};
// Gregorian dates
int LastDayOfGregorianMonth(int month, int year) {
// Compute the last date of the month for the Gregorian calendar.
switch (month) {
case 2:
if ((((year % 4) == 0) && ((year % 100) != 0))
|| ((year % 400) == 0))
return 29;
else
return 28;
case 4:
case 6:
case 9:
case 11: return 30;
default: return 31;
}
}
class GregorianDate {
private:
int year; // 1...
int month; // 1 == January, ..., 12 == December
int day; // 1..LastDayOfGregorianMonth(month, year)
public:
GregorianDate(int m, int d, int y) { month = m; day = d; year = y; }
explicit GregorianDate(int d) { // Computes the Gregorian date from the absolute date.
// Search forward year by year from approximate year
year = d/366;
while (d >= GregorianDate(1,1,year+1).GetAbsoluteDate())
year++;
// Search forward month by month from January
month = 1;
while (d > GregorianDate(month, LastDayOfGregorianMonth(month,year), year).GetAbsoluteDate())
month++;
day = d - GregorianDate(month,1,year).GetAbsoluteDate() + 1;
}
int GetAbsoluteDate() const { // Computes the absolute date from the Gregorian date.
int N = day; // days this month
for (int m = month - 1; m > 0; m--) // days in prior months this year
N = N + LastDayOfGregorianMonth(m, year);
return
(N // days this year
+ 365 * (year - 1) // days in previous years ignoring leap days
+ (year - 1)/4 // Julian leap days before this year...
- (year - 1)/100 // ...minus prior century years...
+ (year - 1)/400); // ...plus prior years divisible by 400
}
int GetMonth() const { return month; }
int GetDay() const { return day; }
int GetYear() const { return year; }
};
// map field value from gregorian calendar to other calendar, it can be overwritten by derived class.
void Calendar_jewish::mapFromGregorian()
{
int y = fieldValue[CalendarFieldIndex::YEAR];
if (fieldValue[CalendarFieldIndex::ERA] == 0)
y = 1 - y;
GregorianDate Temp(fieldValue[CalendarFieldIndex::MONTH] + 1, fieldValue[CalendarFieldIndex::DAY_OF_MONTH], y);
HebrewDate hd(Temp.GetAbsoluteDate());
fieldValue[CalendarFieldIndex::ERA] = hd.GetYear() <= 0 ? 0 : 1;
fieldValue[CalendarFieldIndex::MONTH] = sal::static_int_cast<sal_Int16>( hd.GetMonth() - 1 );
fieldValue[CalendarFieldIndex::DAY_OF_MONTH] = static_cast<sal_Int16>(hd.GetDay());
fieldValue[CalendarFieldIndex::YEAR] = static_cast<sal_Int16>(hd.GetYear() <= 0 ? 1 - hd.GetYear() : hd.GetYear());
}
#define FIELDS ((1 << CalendarFieldIndex::ERA) | (1 << CalendarFieldIndex::YEAR) | (1 << CalendarFieldIndex::MONTH) | (1 << CalendarFieldIndex::DAY_OF_MONTH))
// map field value from other calendar to gregorian calendar, it should be implemented.
void Calendar_jewish::mapToGregorian()
{
if (fieldSet & FIELDS) {
sal_Int16 y = fieldSetValue[CalendarFieldIndex::YEAR];
if (fieldSetValue[CalendarFieldIndex::ERA] == 0)
y = 1 - y;
HebrewDate Temp(fieldSetValue[CalendarFieldIndex::MONTH] + 1, fieldSetValue[CalendarFieldIndex::DAY_OF_MONTH], y);
GregorianDate gd(Temp.GetAbsoluteDate());
fieldSetValue[CalendarFieldIndex::ERA] = gd.GetYear() <= 0 ? 0 : 1;
fieldSetValue[CalendarFieldIndex::MONTH] = sal::static_int_cast<sal_Int16>( gd.GetMonth() - 1 );
fieldSetValue[CalendarFieldIndex::DAY_OF_MONTH] = static_cast<sal_Int16>(gd.GetDay());
fieldSetValue[CalendarFieldIndex::YEAR] = static_cast<sal_Int16>(gd.GetYear() <= 0 ? 1 - gd.GetYear() : gd.GetYear());
fieldSet |= FIELDS;
}
}
// Methods in XExtendedCalendar
OUString SAL_CALL
Calendar_jewish::getDisplayString( sal_Int32 nCalendarDisplayCode, sal_Int16 nNativeNumberMode )
{
nNativeNumberMode = NativeNumberMode::NATNUM2; // make Hebrew number for Jewish calendar
if (nCalendarDisplayCode == CalendarDisplayCode::SHORT_YEAR) {
sal_Int32 value = getValue(CalendarFieldIndex::YEAR) % 1000; // take last 3 digits
return mxNatNum->getNativeNumberString(OUString::number(value), aLocale, nNativeNumberMode );
}
else
return Calendar_gregorian::getDisplayString(nCalendarDisplayCode, nNativeNumberMode );
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
↑ V763 Parameter 'nNativeNumberMode' is always rewritten in function body before being used.