islamcal.h revision 85bf2e2fbc60a9f938064abc8127d61da7d19882
1ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru/* 2ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru ******************************************************************************** 385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Copyright (C) 2003-2009, International Business Machines Corporation 4ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * and others. All Rights Reserved. 5ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru ****************************************************************************** 6ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 7ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * File ISLAMCAL.H 8ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 9ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Modification History: 10ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 11ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Date Name Description 12ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 10/14/2003 srl ported from java IslamicCalendar 13ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru ***************************************************************************** 14ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 15ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 16ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#ifndef ISLAMCAL_H 17ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#define ISLAMCAL_H 18ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 19ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#include "unicode/utypes.h" 20ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 21ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#if !UCONFIG_NO_FORMATTING 22ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 23ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#include "unicode/calendar.h" 24ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 25ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste QueruU_NAMESPACE_BEGIN 26ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 27ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru/** 28ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <code>IslamicCalendar</code> is a subclass of <code>Calendar</code> 2985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * that implements the Islamic civil and religious calendars. It 30ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * is used as the civil calendar in most of the Arab world and the 31ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * liturgical calendar of the Islamic faith worldwide. This calendar 32ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * is also known as the "Hijri" calendar, since it starts at the time 33ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * of Mohammed's emigration (or "hijra") to Medinah on Thursday, 34ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * July 15, 622 AD (Julian). 35ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <p> 36ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * The Islamic calendar is strictly lunar, and thus an Islamic year of twelve 37ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * lunar months does not correspond to the solar year used by most other 38ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * calendar systems, including the Gregorian. An Islamic year is, on average, 39ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * about 354 days long, so each successive Islamic year starts about 11 days 40ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * earlier in the corresponding Gregorian year. 41ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <p> 42ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Each month of the calendar starts when the new moon's crescent is visible 43ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * at sunset. However, in order to keep the time fields in this class 44ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * synchronized with those of the other calendars and with local clock time, 45ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * we treat days and months as beginning at midnight, 46ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * roughly 6 hours after the corresponding sunset. 47ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <p> 48ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * There are two main variants of the Islamic calendar in existence. The first 49ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * is the <em>civil</em> calendar, which uses a fixed cycle of alternating 29- 50ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * and 30-day months, with a leap day added to the last month of 11 out of 51ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * every 30 years. This calendar is easily calculated and thus predictable in 52ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * advance, so it is used as the civil calendar in a number of Arab countries. 53ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * This is the default behavior of a newly-created <code>IslamicCalendar</code> 54ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * object. 55ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <p> 56ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * The Islamic <em>religious</em> calendar, however, is based on the <em>observation</em> 57ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * of the crescent moon. It is thus affected by the position at which the 58ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * observations are made, seasonal variations in the time of sunset, the 59ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * eccentricities of the moon's orbit, and even the weather at the observation 60ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * site. This makes it impossible to calculate in advance, and it causes the 61ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * start of a month in the religious calendar to differ from the civil calendar 62ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * by up to three days. 63ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <p> 64ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Using astronomical calculations for the position of the sun and moon, the 65ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * moon's illumination, and other factors, it is possible to determine the start 66ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * of a lunar month with a fairly high degree of certainty. However, these 67ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * calculations are extremely complicated and thus slow, so most algorithms, 68ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * including the one used here, are only approximations of the true astronical 69ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * calculations. At present, the approximations used in this class are fairly 70ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * simplistic; they will be improved in later versions of the code. 71ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <p> 72ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * The {@link #setCivil setCivil} method determines 73ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * which approach is used to determine the start of a month. By default, the 74ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * fixed-cycle civil calendar is used. However, if <code>setCivil(false)</code> 75ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * is called, an approximation of the true lunar calendar will be used. 76ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 77ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @see GregorianCalendar 78ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 79ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @author Laura Werner 80ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @author Alan Liu 81ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @author Steven R. Loomis 82ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 83ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 84ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queruclass IslamicCalendar : public Calendar { 85ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru public: 86ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru //------------------------------------------------------------------------- 87ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // Constants... 88ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru //------------------------------------------------------------------------- 89ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 90ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Calendar type - civil or religious 91ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 92ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 93ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru enum ECivil { 94ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru ASTRONOMICAL, 95ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru CIVIL 96ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru }; 97ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 98ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 99ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constants for the months 100ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 101ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 102ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru enum EMonths { 103ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 104ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constant for Muharram, the 1st month of the Islamic year. 105ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 106ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 107ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru MUHARRAM = 0, 108ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 109ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 110ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constant for Safar, the 2nd month of the Islamic year. 111ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 112ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 113ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru SAFAR = 1, 114ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 115ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 116ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constant for Rabi' al-awwal (or Rabi' I), the 3rd month of the Islamic year. 117ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 118ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 119ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru RABI_1 = 2, 120ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 121ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 122ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constant for Rabi' al-thani or (Rabi' II), the 4th month of the Islamic year. 123ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 124ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 125ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru RABI_2 = 3, 126ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 127ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 128ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constant for Jumada al-awwal or (Jumada I), the 5th month of the Islamic year. 129ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 130ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 131ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru JUMADA_1 = 4, 132ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 133ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 134ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constant for Jumada al-thani or (Jumada II), the 6th month of the Islamic year. 135ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 136ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 137ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru JUMADA_2 = 5, 138ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 139ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 140ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constant for Rajab, the 7th month of the Islamic year. 141ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 142ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 143ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru RAJAB = 6, 144ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 145ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 146ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constant for Sha'ban, the 8th month of the Islamic year. 147ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 148ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 149ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru SHABAN = 7, 150ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 151ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 152ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constant for Ramadan, the 9th month of the Islamic year. 153ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 154ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 155ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru RAMADAN = 8, 156ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 157ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 158ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constant for Shawwal, the 10th month of the Islamic year. 159ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 160ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 161ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru SHAWWAL = 9, 162ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 163ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 164ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constant for Dhu al-Qi'dah, the 11th month of the Islamic year. 165ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 166ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 167ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru DHU_AL_QIDAH = 10, 168ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 169ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 170ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constant for Dhu al-Hijjah, the 12th month of the Islamic year. 171ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 172ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 173ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru DHU_AL_HIJJAH = 11, 174ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 175ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru ISLAMIC_MONTH_MAX 176ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru }; 177ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 178ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 179ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 180ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru //------------------------------------------------------------------------- 181ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // Constructors... 182ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru //------------------------------------------------------------------------- 183ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 184ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 185ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Constructs an IslamicCalendar based on the current time in the default time zone 186ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * with the given locale. 187ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 188ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param aLocale The given locale. 189ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param success Indicates the status of IslamicCalendar object construction. 190ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Returns U_ZERO_ERROR if constructed successfully. 191ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param beCivil Whether the calendar should be civil (default-TRUE) or religious (FALSE) 192ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 193ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 194ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru IslamicCalendar(const Locale& aLocale, UErrorCode &success, ECivil beCivil = CIVIL); 195ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 196ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 197ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Copy Constructor 198ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 199ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 200ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru IslamicCalendar(const IslamicCalendar& other); 201ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 202ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 203ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Destructor. 204ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 205ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 206ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual ~IslamicCalendar(); 207ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 208ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 209ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Determines whether this object uses the fixed-cycle Islamic civil calendar 210ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * or an approximation of the religious, astronomical calendar. 211ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 212ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param beCivil <code>CIVIL</code> to use the civil calendar, 213ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <code>ASTRONOMICAL</code> to use the astronomical calendar. 214ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 215ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 216ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru void setCivil(ECivil beCivil, UErrorCode &status); 217ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 218ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 219ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Returns <code>true</code> if this object is using the fixed-cycle civil 220ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * calendar, or <code>false</code> if using the religious, astronomical 221ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * calendar. 222ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 223ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 224ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru UBool isCivil(); 225ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 226ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 227ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // TODO: copy c'tor, etc 228ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 229ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // clone 230ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual Calendar* clone() const; 231ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 232ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru private: 233ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 234ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Determine whether a year is a leap year in the Islamic civil calendar 235ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 236ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru static UBool civilLeapYear(int32_t year); 237ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 238ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 239ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Return the day # on which the given year starts. Days are counted 240ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * from the Hijri epoch, origin 0. 241ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 242ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru int32_t yearStart(int32_t year); 243ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 244ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 245ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Return the day # on which the given month starts. Days are counted 246ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * from the Hijri epoch, origin 0. 247ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 248ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param year The hijri year 249ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param year The hijri month, 0-based 250ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 251ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru int32_t monthStart(int32_t year, int32_t month) const; 252ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 253ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 254ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Find the day number on which a particular month of the true/lunar 255ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Islamic calendar starts. 256ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 257ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param month The month in question, origin 0 from the Hijri epoch 258ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 259ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @return The day number on which the given month starts. 260ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 261ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru int32_t trueMonthStart(int32_t month) const; 262ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 263ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 264ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Return the "age" of the moon at the given time; this is the difference 265ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * in ecliptic latitude between the moon and the sun. This method simply 266ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * calls CalendarAstronomer.moonAge, converts to degrees, 267ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * and adjusts the resultto be in the range [-180, 180]. 268ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 269ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param time The time at which the moon's age is desired, 270ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * in millis since 1/1/1970. 271ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 27285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho static double moonAge(UDate time, UErrorCode &status); 273ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 274ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru //------------------------------------------------------------------------- 275ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // Internal data.... 276ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // 277ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 278ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 279ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <code>CIVIL</code> if this object uses the fixed-cycle Islamic civil calendar, 280ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * and <code>ASTRONOMICAL</code> if it approximates the true religious calendar using 281ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * astronomical calculations for the time of the new moon. 282ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 283ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru ECivil civil; 284ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 285ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru //---------------------------------------------------------------------- 286ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // Calendar framework 287ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru //---------------------------------------------------------------------- 288ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru protected: 289ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 290ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 291ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 292ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual int32_t handleGetLimit(UCalendarDateFields field, ELimitType limitType) const; 293ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 294ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 295ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Return the length (in days) of the given month. 296ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 297ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param year The hijri year 298ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param year The hijri month, 0-based 299ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 300ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 301ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual int32_t handleGetMonthLength(int32_t extendedYear, int32_t month) const; 302ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 303ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 304ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Return the number of days in the given Islamic year 305ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 306ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 307ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual int32_t handleGetYearLength(int32_t extendedYear) const; 308ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 309ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru //------------------------------------------------------------------------- 310ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // Functions for converting from field values to milliseconds.... 311ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru //------------------------------------------------------------------------- 312ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 313ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // Return JD of start of given month/year 314ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 315ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 316ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 317ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual int32_t handleComputeMonthStart(int32_t eyear, int32_t month, UBool useMonth) const; 318ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 319ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru //------------------------------------------------------------------------- 320ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // Functions for converting from milliseconds to field values 321ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru //------------------------------------------------------------------------- 322ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 323ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 324ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 325ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 326ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual int32_t handleGetExtendedYear(); 327ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 328ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 329ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Override Calendar to compute several fields specific to the Islamic 330ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * calendar system. These are: 331ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 332ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <ul><li>ERA 333ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <li>YEAR 334ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <li>MONTH 335ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <li>DAY_OF_MONTH 336ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <li>DAY_OF_YEAR 337ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * <li>EXTENDED_YEAR</ul> 338ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 339ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * The DAY_OF_WEEK and DOW_LOCAL fields are already set when this 340ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * method is called. The getGregorianXxx() methods return Gregorian 341ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * calendar equivalents for the given Julian day. 342ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 343ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 344ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual void handleComputeFields(int32_t julianDay, UErrorCode &status); 345ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 346ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // UObject stuff 347ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru public: 348ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 349ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @return The class ID for this object. All objects of a given class have the 350ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * same class ID. Objects of other classes have different class IDs. 351ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 352ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 353ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual UClassID getDynamicClassID(void) const; 354ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 355ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 356ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Return the class ID for this class. This is useful only for comparing to a return 357ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * value from getDynamicClassID(). For example: 358ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 359ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Base* polymorphic_pointer = createPolymorphicObject(); 360ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * if (polymorphic_pointer->getDynamicClassID() == 361ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Derived::getStaticClassID()) ... 362ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 363ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @return The class ID for all objects of this class. 364ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 365ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 366ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru U_I18N_API static UClassID U_EXPORT2 getStaticClassID(void); 367ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 368ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 369ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * return the calendar type, "buddhist". 370ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 371ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @return calendar type 372ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 373ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 374ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual const char * getType() const; 375ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 376ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru private: 377ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru IslamicCalendar(); // default constructor not implemented 378ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 379ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // Default century. 380ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru protected: 381ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 382ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 383ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * (Overrides Calendar) Return true if the current date for this Calendar is in 384ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Daylight Savings Time. Recognizes DST_OFFSET, if it is set. 385ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 386ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param status Fill-in parameter which receives the status of this operation. 387ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @return True if the current date for this Calendar is in Daylight Savings Time, 388ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * false, otherwise. 389ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 390ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 391ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual UBool inDaylightTime(UErrorCode& status) const; 392ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 393ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 394ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 395ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Returns TRUE because the Islamic Calendar does have a default century 396ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 397ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 398ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual UBool haveDefaultCentury() const; 399ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 400ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 401ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Returns the date of the start of the default century 402ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @return start of century - in milliseconds since epoch, 1970 403ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 404ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 405ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual UDate defaultCenturyStart() const; 406ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 407ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 408ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Returns the year in which the default century begins 409ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 410ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 411ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual int32_t defaultCenturyStartYear() const; 412ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 413ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru private: // default century stuff. 414ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 415ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * The system maintains a static default century start date. This is initialized 416ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * the first time it is used. Before then, it is set to SYSTEM_DEFAULT_CENTURY to 417ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * indicate an uninitialized state. Once the system default century date and year 418ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * are set, they do not change. 419ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 420ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru static UDate fgSystemDefaultCenturyStart; 421ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 422ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 423ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * See documentation for systemDefaultCenturyStart. 424ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 425ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru static int32_t fgSystemDefaultCenturyStartYear; 426ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 427ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 428ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Default value that indicates the defaultCenturyStartYear is unitialized 429ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 430ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru static const int32_t fgSystemDefaultCenturyYear; 431ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 432ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 433ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * start of default century, as a date 434ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 435ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru static const UDate fgSystemDefaultCentury; 436ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 437ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 438ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Returns the beginning date of the 100-year window that dates 439ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * with 2-digit years are considered to fall within. 440ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 441ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru UDate internalGetDefaultCenturyStart(void) const; 442ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 443ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 444ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Returns the first year of the 100-year window that dates with 445ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 2-digit years are considered to fall within. 446ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 447ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru int32_t internalGetDefaultCenturyStartYear(void) const; 448ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 449ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 450ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Initializes the 100-year window that dates with 2-digit years 451ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * are considered to fall within so that its start date is 80 years 452ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * before the current time. 453ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 454ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru static void initializeSystemDefaultCentury(void); 455ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru}; 456ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 457ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste QueruU_NAMESPACE_END 458ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 459ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#endif 460ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#endif 461ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 462ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 463ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 464