LCOV - code coverage report
Current view: top level - libreoffice/i18npool/source/calendar - calendar_jewish.cxx (source / functions) Hit Total Coverage
Test: libreoffice_filtered.info Lines: 0 122 0.0 %
Date: 2012-12-27 Functions: 0 24 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       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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