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1 : : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : : /*
3 : : * This file is part of the LibreOffice project.
4 : : *
5 : : * This Source Code Form is subject to the terms of the Mozilla Public
6 : : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : : *
9 : : * This file incorporates work covered by the following license notice:
10 : : *
11 : : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : : * contributor license agreements. See the NOTICE file distributed
13 : : * with this work for additional information regarding copyright
14 : : * ownership. The ASF licenses this file to you under the Apache
15 : : * License, Version 2.0 (the "License"); you may not use this file
16 : : * except in compliance with the License. You may obtain a copy of
17 : : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : : */
19 : :
20 : :
21 : : #include <math.h>
22 : : #include <stdio.h>
23 : :
24 : : #include "calendar_jewish.hxx"
25 : :
26 : : using namespace ::com::sun::star::uno;
27 : : using namespace ::com::sun::star::lang;
28 : : using ::rtl::OUString;
29 : :
30 : : #define ERROR RuntimeException()
31 : :
32 : : namespace com { namespace sun { namespace star { namespace i18n {
33 : :
34 : : // not used
35 : : //static UErrorCode status; // status is shared in all calls to Calendar, it has to be reset for each call.
36 : :
37 : 0 : Calendar_jewish::Calendar_jewish()
38 : : {
39 : 0 : cCalendar = "com.sun.star.i18n.Calendar_jewish";
40 : 0 : }
41 : :
42 : : // The following C++ code is translated from the Lisp code in
43 : : // ``Calendrical Calculations'' by Nachum Dershowitz and Edward M. Reingold,
44 : : // Software---Practice & Experience, vol. 20, no. 9 (September, 1990),
45 : : // pp. 899--928.
46 : :
47 : : // This code is in the public domain, but any use of it
48 : : // should acknowledge its source.
49 : : // http://www.ntu.edu.sg/home/ayxyan/date1.txt
50 : :
51 : : // Hebrew dates
52 : :
53 : : const int HebrewEpoch = -1373429; // Absolute date of start of Hebrew calendar
54 : :
55 : : // True if year is an Hebrew leap year
56 : 0 : sal_Bool HebrewLeapYear(sal_Int32 year) {
57 : 0 : return ((((7 * year) + 1) % 19) < 7);
58 : : }
59 : :
60 : : // Last month of Hebrew year.
61 : 0 : sal_Int32 LastMonthOfHebrewYear(sal_Int32 year) {
62 [ # # ]: 0 : return (HebrewLeapYear(year)) ? 13 : 12;
63 : : }
64 : :
65 : : // Number of days elapsed from the Sunday prior to the start of the
66 : : // Hebrew calendar to the mean conjunction of Tishri of Hebrew year.
67 : 0 : sal_Int32 HebrewCalendarElapsedDays(sal_Int32 year) {
68 : : sal_Int32 MonthsElapsed =
69 : : (235 * ((year - 1) / 19)) // Months in complete cycles so far.
70 : : + (12 * ((year - 1) % 19)) // Regular months in this cycle.
71 : 0 : + (7 * ((year - 1) % 19) + 1) / 19; // Leap months this cycle
72 : 0 : sal_Int32 PartsElapsed = 204 + 793 * (MonthsElapsed % 1080);
73 : : int HoursElapsed =
74 : : 5 + 12 * MonthsElapsed + 793 * (MonthsElapsed / 1080)
75 : 0 : + PartsElapsed / 1080;
76 : 0 : sal_Int32 ConjunctionDay = 1 + 29 * MonthsElapsed + HoursElapsed / 24;
77 : 0 : sal_Int32 ConjunctionParts = 1080 * (HoursElapsed % 24) + PartsElapsed % 1080;
78 : : sal_Int32 AlternativeDay;
79 : :
80 [ # # ][ # # ]: 0 : if ((ConjunctionParts >= 19440) // If new moon is at or after midday,
[ # # # # ]
[ # # ]
[ # # # # ]
[ # # ]
81 : : || (((ConjunctionDay % 7) == 2) // ...or is on a Tuesday...
82 : : && (ConjunctionParts >= 9924) // at 9 hours, 204 parts or later...
83 : 0 : && !(HebrewLeapYear(year))) // ...of a common year,
84 : : || (((ConjunctionDay % 7) == 1) // ...or is on a Monday at...
85 : : && (ConjunctionParts >= 16789) // 15 hours, 589 parts or later...
86 : 0 : && (HebrewLeapYear(year - 1))))// at the end of a leap year
87 : : // Then postpone Rosh HaShanah one day
88 : 0 : AlternativeDay = ConjunctionDay + 1;
89 : : else
90 : 0 : AlternativeDay = ConjunctionDay;
91 : :
92 [ # # ][ # # ]: 0 : if (((AlternativeDay % 7) == 0)// If Rosh HaShanah would occur on Sunday,
[ # # ]
93 : : || ((AlternativeDay % 7) == 3) // or Wednesday,
94 : : || ((AlternativeDay % 7) == 5)) // or Friday
95 : : // Then postpone it one (more) day
96 : 0 : return (1+ AlternativeDay);
97 : : else
98 : 0 : return AlternativeDay;
99 : : }
100 : :
101 : : // Number of days in Hebrew year.
102 : 0 : sal_Int32 DaysInHebrewYear(sal_Int32 year) {
103 : 0 : return ((HebrewCalendarElapsedDays(year + 1)) -
104 : 0 : (HebrewCalendarElapsedDays(year)));
105 : : }
106 : :
107 : : // True if Heshvan is long in Hebrew year.
108 : 0 : sal_Bool LongHeshvan(sal_Int32 year) {
109 : 0 : return ((DaysInHebrewYear(year) % 10) == 5);
110 : : }
111 : :
112 : : // True if Kislev is short in Hebrew year.
113 : 0 : sal_Bool ShortKislev(sal_Int32 year) {
114 : 0 : return ((DaysInHebrewYear(year) % 10) == 3);
115 : : }
116 : :
117 : : // Last day of month in Hebrew year.
118 : 0 : sal_Int32 LastDayOfHebrewMonth(sal_Int32 month, sal_Int32 year) {
119 [ # # ][ # # ]: 0 : if ((month == 2)
[ # # ]
[ # # # # ]
[ # # # # ]
[ # # ]
[ # # # # ]
[ # # ][ # # ]
120 : : || (month == 4)
121 : : || (month == 6)
122 : 0 : || ((month == 8) && !(LongHeshvan(year)))
123 : 0 : || ((month == 9) && ShortKislev(year))
124 : : || (month == 10)
125 : 0 : || ((month == 12) && !(HebrewLeapYear(year)))
126 : : || (month == 13))
127 : 0 : return 29;
128 : : else
129 : 0 : return 30;
130 : : }
131 : :
132 : :
133 : : class HebrewDate {
134 : : private:
135 : : sal_Int32 year; // 1...
136 : : sal_Int32 month; // 1..LastMonthOfHebrewYear(year)
137 : : sal_Int32 day; // 1..LastDayOfHebrewMonth(month, year)
138 : :
139 : : public:
140 : 0 : HebrewDate(sal_Int32 m, sal_Int32 d, sal_Int32 y) { month = m; day = d; year = y; }
141 : :
142 : 0 : HebrewDate(sal_Int32 d) { // Computes the Hebrew date from the absolute date.
143 : 0 : year = (d + HebrewEpoch) / 366; // Approximation from below.
144 : : // Search forward for year from the approximation.
145 [ # # ]: 0 : while (d >= HebrewDate(7,1,year + 1))
146 : 0 : year++;
147 : : // Search forward for month from either Tishri or Nisan.
148 [ # # ]: 0 : if (d < HebrewDate(1, 1, year))
149 : 0 : month = 7; // Start at Tishri
150 : : else
151 : 0 : month = 1; // Start at Nisan
152 [ # # ]: 0 : while (d > HebrewDate(month, (LastDayOfHebrewMonth(month,year)), year))
153 : 0 : month++;
154 : : // Calculate the day by subtraction.
155 : 0 : day = d - HebrewDate(month, 1, year) + 1;
156 : 0 : }
157 : :
158 : 0 : operator int() { // Computes the absolute date of Hebrew date.
159 : 0 : sal_Int32 DayInYear = day; // Days so far this month.
160 [ # # ]: 0 : if (month < 7) { // Before Tishri, so add days in prior months
161 : : // this year before and after Nisan.
162 : 0 : sal_Int32 m = 7;
163 [ # # ]: 0 : while (m <= (LastMonthOfHebrewYear(year))) {
164 : 0 : DayInYear = DayInYear + LastDayOfHebrewMonth(m, year);
165 : 0 : m++;
166 : : };
167 : 0 : m = 1;
168 [ # # ]: 0 : while (m < month) {
169 : 0 : DayInYear = DayInYear + LastDayOfHebrewMonth(m, year);
170 : 0 : m++;
171 : : }
172 : : }
173 : : else { // Add days in prior months this year
174 : 0 : sal_Int32 m = 7;
175 [ # # ]: 0 : while (m < month) {
176 : 0 : DayInYear = DayInYear + LastDayOfHebrewMonth(m, year);
177 : 0 : m++;
178 : : }
179 : : }
180 : : return (DayInYear +
181 : 0 : (HebrewCalendarElapsedDays(year)// Days in prior years.
182 : 0 : + HebrewEpoch)); // Days elapsed before absolute date 1.
183 : : }
184 : :
185 : 0 : sal_Int32 GetMonth() const { return month; }
186 : 0 : sal_Int32 GetDay() const { return day; }
187 : 0 : sal_Int32 GetYear() const { return year; }
188 : :
189 : : };
190 : :
191 : : // Gregorian dates
192 : :
193 : 0 : int LastDayOfGregorianMonth(int month, int year) {
194 : : // Compute the last date of the month for the Gregorian calendar.
195 : :
196 [ # # # ]: 0 : switch (month) {
197 : : case 2:
198 [ # # ][ # # ]: 0 : if ((((year % 4) == 0) && ((year % 100) != 0))
[ # # ]
199 : : || ((year % 400) == 0))
200 : 0 : return 29;
201 : : else
202 : 0 : return 28;
203 : : case 4:
204 : : case 6:
205 : : case 9:
206 : 0 : case 11: return 30;
207 : 0 : default: return 31;
208 : : }
209 : : }
210 : :
211 : : class GregorianDate {
212 : : private:
213 : : int year; // 1...
214 : : int month; // 1 == January, ..., 12 == December
215 : : int day; // 1..LastDayOfGregorianMonth(month, year)
216 : :
217 : : public:
218 : 0 : GregorianDate(int m, int d, int y) { month = m; day = d; year = y; }
219 : :
220 : 0 : GregorianDate(int d) { // Computes the Gregorian date from the absolute date.
221 : : // Search forward year by year from approximate year
222 : 0 : year = d/366;
223 [ # # ]: 0 : while (d >= GregorianDate(1,1,year+1))
224 : 0 : year++;
225 : : // Search forward month by month from January
226 : 0 : month = 1;
227 [ # # ]: 0 : while (d > GregorianDate(month, LastDayOfGregorianMonth(month,year), year))
228 : 0 : month++;
229 : 0 : day = d - GregorianDate(month,1,year) + 1;
230 : 0 : }
231 : :
232 : 0 : operator int() { // Computes the absolute date from the Gregorian date.
233 : 0 : int N = day; // days this month
234 [ # # ]: 0 : for (int m = month - 1; m > 0; m--) // days in prior months this year
235 : 0 : N = N + LastDayOfGregorianMonth(m, year);
236 : : return
237 : : (N // days this year
238 : : + 365 * (year - 1) // days in previous years ignoring leap days
239 : : + (year - 1)/4 // Julian leap days before this year...
240 : : - (year - 1)/100 // ...minus prior century years...
241 : 0 : + (year - 1)/400); // ...plus prior years divisible by 400
242 : : }
243 : :
244 : 0 : int GetMonth() const { return month; }
245 : 0 : int GetDay() const { return day; }
246 : 0 : int GetYear() const { return year; }
247 : :
248 : : };
249 : :
250 : : // map field value from gregorian calendar to other calendar, it can be overwritten by derived class.
251 : 0 : void Calendar_jewish::mapFromGregorian() throw(RuntimeException)
252 : : {
253 : 0 : int y = fieldValue[CalendarFieldIndex::YEAR];
254 [ # # ]: 0 : if (fieldValue[CalendarFieldIndex::ERA] == 0)
255 : 0 : y = 1 - y;
256 : 0 : GregorianDate Temp(fieldValue[CalendarFieldIndex::MONTH] + 1, fieldValue[CalendarFieldIndex::DAY_OF_MONTH], y);
257 [ # # ]: 0 : HebrewDate hd(Temp);
258 : :
259 : 0 : fieldValue[CalendarFieldIndex::ERA] = hd.GetYear() <= 0 ? 0 : 1;
260 : 0 : fieldValue[CalendarFieldIndex::MONTH] = sal::static_int_cast<sal_Int16>( hd.GetMonth() - 1 );
261 : 0 : fieldValue[CalendarFieldIndex::DAY_OF_MONTH] = (sal_Int16)hd.GetDay();
262 [ # # ]: 0 : fieldValue[CalendarFieldIndex::YEAR] = (sal_Int16)(hd.GetYear() <= 0 ? 1 - hd.GetYear() : hd.GetYear());
263 : 0 : }
264 : :
265 : : #define FIELDS ((1 << CalendarFieldIndex::ERA) | (1 << CalendarFieldIndex::YEAR) | (1 << CalendarFieldIndex::MONTH) | (1 << CalendarFieldIndex::DAY_OF_MONTH))
266 : : // map field value from other calendar to gregorian calendar, it should be implemented.
267 : 0 : void Calendar_jewish::mapToGregorian() throw(RuntimeException)
268 : : {
269 [ # # ]: 0 : if (fieldSet & FIELDS) {
270 : 0 : sal_Int16 y = fieldSetValue[CalendarFieldIndex::YEAR];
271 [ # # ]: 0 : if (fieldSetValue[CalendarFieldIndex::ERA] == 0)
272 : 0 : y = 1 - y;
273 : 0 : HebrewDate Temp(fieldSetValue[CalendarFieldIndex::MONTH] + 1, fieldSetValue[CalendarFieldIndex::DAY_OF_MONTH], y);
274 [ # # ]: 0 : GregorianDate gd(Temp);
275 : :
276 : 0 : fieldSetValue[CalendarFieldIndex::ERA] = gd.GetYear() <= 0 ? 0 : 1;
277 : 0 : fieldSetValue[CalendarFieldIndex::MONTH] = sal::static_int_cast<sal_Int16>( gd.GetMonth() - 1 );
278 : 0 : fieldSetValue[CalendarFieldIndex::DAY_OF_MONTH] = (sal_Int16)gd.GetDay();
279 [ # # ]: 0 : fieldSetValue[CalendarFieldIndex::YEAR] = (sal_Int16)(gd.GetYear() <= 0 ? 1 - gd.GetYear() : gd.GetYear());
280 : 0 : fieldSet |= FIELDS;
281 : : }
282 : 0 : }
283 : :
284 : : // Methods in XExtendedCalendar
285 : : OUString SAL_CALL
286 : 0 : Calendar_jewish::getDisplayString( sal_Int32 nCalendarDisplayCode, sal_Int16 nNativeNumberMode )
287 : : throw (RuntimeException)
288 : : {
289 : 0 : nNativeNumberMode = NativeNumberMode::NATNUM2; // make Hebrew number for Jewish calendar
290 : :
291 [ # # ]: 0 : if (nCalendarDisplayCode == CalendarDisplayCode::SHORT_YEAR) {
292 : 0 : sal_Int32 value = getValue(CalendarFieldIndex::YEAR) % 1000; // take last 3 digits
293 [ # # ]: 0 : return aNatNum.getNativeNumberString(OUString::valueOf(value), aLocale, nNativeNumberMode );
294 : : }
295 : : else
296 : 0 : return Calendar_gregorian::getDisplayString(nCalendarDisplayCode, nNativeNumberMode );
297 : : }
298 : :
299 : : }}}}
300 : :
301 : : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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