1ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru/* 2ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru ****************************************************************************** 385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Copyright (C) 2007-2008, International Business Machines Corporation 485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * and others. All Rights Reserved. 5ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru ****************************************************************************** 6ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * File CHNSECAL.CPP 8ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Modification History: 1085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 1185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Date Name Description 1285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 9/18/2007 ajmacher ported from java ChineseCalendar 1385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ***************************************************************************** 14ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 1585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 16ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#include "chnsecal.h" 17ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 1885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#if !UCONFIG_NO_FORMATTING 1985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 2085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#include "umutex.h" 2185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#include <float.h> 2285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#include "gregoimp.h" // Math 2385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#include "astro.h" // CalendarAstronomer 2485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#include "uhash.h" 2585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#include "ucln_in.h" 2685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 2785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Debugging 2885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#ifdef U_DEBUG_CHNSECAL 2985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho# include <stdio.h> 3085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho# include <stdarg.h> 3185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic void debug_chnsecal_loc(const char *f, int32_t l) 3285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 3385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho fprintf(stderr, "%s:%d: ", f, l); 3485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 3585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 3685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic void debug_chnsecal_msg(const char *pat, ...) 3785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 3885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho va_list ap; 3985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho va_start(ap, pat); 4085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho vfprintf(stderr, pat, ap); 4185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho fflush(stderr); 4285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 4385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// must use double parens, i.e.: U_DEBUG_CHNSECAL_MSG(("four is: %d",4)); 4485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#define U_DEBUG_CHNSECAL_MSG(x) {debug_chnsecal_loc(__FILE__,__LINE__);debug_chnsecal_msg x;} 4585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#else 4685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#define U_DEBUG_CHNSECAL_MSG(x) 4785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#endif 4885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 4985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 5085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// --- The cache -- 5185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic UMTX astroLock = 0; // pod bay door lock 5285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic U_NAMESPACE_QUALIFIER CalendarAstronomer *gChineseCalendarAstro = NULL; 5385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic U_NAMESPACE_QUALIFIER CalendarCache *gChineseCalendarWinterSolsticeCache = NULL; 5485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic U_NAMESPACE_QUALIFIER CalendarCache *gChineseCalendarNewYearCache = NULL; 5585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 5685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 5785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * The start year of the Chinese calendar, the 61st year of the reign 5885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * of Huang Di. Some sources use the first year of his reign, 5985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * resulting in EXTENDED_YEAR values 60 years greater and ERA (cycle) 6085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * values one greater. 6185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 6285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic const int32_t CHINESE_EPOCH_YEAR = -2636; // Gregorian year 6385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 6485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 6585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * The offset from GMT in milliseconds at which we perform astronomical 6685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * computations. Some sources use a different historically accurate 6785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * offset of GMT+7:45:40 for years before 1929; we do not do this. 6885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 6985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic const double CHINA_OFFSET = 8 * kOneHour; 7085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 7185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 7285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Value to be added or subtracted from the local days of a new moon to 7385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * get close to the next or prior new moon, but not cross it. Must be 7485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * >= 1 and < CalendarAstronomer.SYNODIC_MONTH. 7585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 7685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic const int32_t SYNODIC_GAP = 25; 7785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 7885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 7985bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoU_CDECL_BEGIN 8085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic UBool calendar_chinese_cleanup(void) { 8185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (gChineseCalendarAstro) { 8285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho delete gChineseCalendarAstro; 8385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro = NULL; 8485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 8585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (gChineseCalendarWinterSolsticeCache) { 8685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho delete gChineseCalendarWinterSolsticeCache; 8785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarWinterSolsticeCache = NULL; 8885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 8985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (gChineseCalendarNewYearCache) { 9085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho delete gChineseCalendarNewYearCache; 9185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarNewYearCache = NULL; 9285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 9385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_destroy(&astroLock); 9485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return TRUE; 9585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 9685bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoU_CDECL_END 9785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 9885bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoU_NAMESPACE_BEGIN 9985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 10085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 10185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Implementation of the ChineseCalendar class 10285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 10385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 10485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------------- 10585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Constructors... 10685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------------- 10785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 10885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 10985bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoCalendar* ChineseCalendar::clone() const { 11085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return new ChineseCalendar(*this); 11185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 11285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 11385bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoChineseCalendar::ChineseCalendar(const Locale& aLocale, UErrorCode& success) 11485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho: Calendar(TimeZone::createDefault(), aLocale, success) 11585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 11685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho isLeapYear = FALSE; 11785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly. 11885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 11985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 12085bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoChineseCalendar::ChineseCalendar(const ChineseCalendar& other) : Calendar(other) { 12185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho isLeapYear = other.isLeapYear; 12285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 12385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 12485bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoChineseCalendar::~ChineseCalendar() 12585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 12685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 12785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 12885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoconst char *ChineseCalendar::getType() const { 12985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return "chinese"; 13085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 13185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 13285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------------- 13385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Minimum / Maximum access functions 13485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------------- 13585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 13685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 13785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic const int32_t LIMITS[UCAL_FIELD_COUNT][4] = { 13885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Minimum Greatest Least Maximum 13985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Minimum Maximum 14085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 1, 1, 83333, 83333}, // ERA 14185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 1, 1, 60, 60}, // YEAR 14285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 0, 0, 11, 11}, // MONTH 14385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 1, 1, 50, 55}, // WEEK_OF_YEAR 14485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH 14585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 1, 1, 29, 30}, // DAY_OF_MONTH 14685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 1, 1, 353, 385}, // DAY_OF_YEAR 14785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK 14885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { -1, -1, 5, 5}, // DAY_OF_WEEK_IN_MONTH 14985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM 15085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR 15185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY 15285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE 15385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND 15485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND 15585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET 15685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET 15785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { -5000000, -5000000, 5000000, 5000000}, // YEAR_WOY 15885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL 15985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { -5000000, -5000000, 5000000, 5000000}, // EXTENDED_YEAR 16085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY 16185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECONDS_IN_DAY 16285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 0, 0, 1, 1}, // IS_LEAP_MONTH 16385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho}; 16485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 16585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 16685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 16785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho* @draft ICU 2.4 16885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho*/ 16985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const { 17085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return LIMITS[field][limitType]; 17185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 17285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 17385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 17485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//---------------------------------------------------------------------- 17585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Calendar framework 17685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//---------------------------------------------------------------------- 17785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 17885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 17985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Implement abstract Calendar method to return the extended year 18085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * defined by the current fields. This will use either the ERA and 18185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * YEAR field as the cycle and year-of-cycle, or the EXTENDED_YEAR 18285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * field as the continuous year count, depending on which is newer. 18385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 18485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 18585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::handleGetExtendedYear() { 18685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t year; 18785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (newestStamp(UCAL_ERA, UCAL_YEAR, kUnset) <= fStamp[UCAL_EXTENDED_YEAR]) { 18885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho year = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1 18985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } else { 19085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t cycle = internalGet(UCAL_ERA, 1) - 1; // 0-based cycle 19185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho year = cycle * 60 + internalGet(UCAL_YEAR, 1); 19285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 19385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return year; 19485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 19585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 19685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 19785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Override Calendar method to return the number of days in the given 19885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * extended year and month. 19985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 20085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <p>Note: This method also reads the IS_LEAP_MONTH field to determine 20185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * whether or not the given month is a leap month. 20285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 20385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 20485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::handleGetMonthLength(int32_t extendedYear, int32_t month) const { 20585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t thisStart = handleComputeMonthStart(extendedYear, month, TRUE) - 20685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho kEpochStartAsJulianDay + 1; // Julian day -> local days 20785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t nextStart = newMoonNear(thisStart + SYNODIC_GAP, TRUE); 20885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return nextStart - thisStart; 20985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 21085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 21185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 21285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Override Calendar to compute several fields specific to the Chinese 21385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * calendar system. These are: 21485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 21585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <ul><li>ERA 21685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <li>YEAR 21785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <li>MONTH 21885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <li>DAY_OF_MONTH 21985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <li>DAY_OF_YEAR 22085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <li>EXTENDED_YEAR</ul> 22185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 22285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * The DAY_OF_WEEK and DOW_LOCAL fields are already set when this 22385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * method is called. The getGregorianXxx() methods return Gregorian 22485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * calendar equivalents for the given Julian day. 22585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 22685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <p>Compute the ChineseCalendar-specific field IS_LEAP_MONTH. 22785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 22885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 22985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/) { 23085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 23185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho computeChineseFields(julianDay - kEpochStartAsJulianDay, // local days 23285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho getGregorianYear(), getGregorianMonth(), 23385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho TRUE); // set all fields 23485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 23585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 23685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 23785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Field resolution table that incorporates IS_LEAP_MONTH. 23885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 23985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoconst UFieldResolutionTable ChineseCalendar::CHINESE_DATE_PRECEDENCE[] = 24085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 24185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 24285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_DAY_OF_MONTH, kResolveSTOP }, 24385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_WEEK_OF_YEAR, UCAL_DAY_OF_WEEK, kResolveSTOP }, 24485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_WEEK_OF_MONTH, UCAL_DAY_OF_WEEK, kResolveSTOP }, 24585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DAY_OF_WEEK, kResolveSTOP }, 24685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_WEEK_OF_YEAR, UCAL_DOW_LOCAL, kResolveSTOP }, 24785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_WEEK_OF_MONTH, UCAL_DOW_LOCAL, kResolveSTOP }, 24885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DOW_LOCAL, kResolveSTOP }, 24985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_DAY_OF_YEAR, kResolveSTOP }, 25085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { kResolveRemap | UCAL_DAY_OF_MONTH, UCAL_IS_LEAP_MONTH, kResolveSTOP }, 25185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { kResolveSTOP } 25285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho }, 25385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 25485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_WEEK_OF_YEAR, kResolveSTOP }, 25585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_WEEK_OF_MONTH, kResolveSTOP }, 25685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_DAY_OF_WEEK_IN_MONTH, kResolveSTOP }, 25785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { kResolveRemap | UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DAY_OF_WEEK, kResolveSTOP }, 25885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { kResolveRemap | UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DOW_LOCAL, kResolveSTOP }, 25985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { kResolveSTOP } 26085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho }, 26185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {{kResolveSTOP}} 26285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho}; 26385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 26485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 26585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Override Calendar to add IS_LEAP_MONTH to the field resolution 26685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * table. 26785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 26885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 26985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoconst UFieldResolutionTable* ChineseCalendar::getFieldResolutionTable() const { 27085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return CHINESE_DATE_PRECEDENCE; 27185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 27285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 27385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 27485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return the Julian day number of day before the first day of the 27585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * given month in the given extended year. 27685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 27785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <p>Note: This method reads the IS_LEAP_MONTH field to determine 27885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * whether the given month is a leap month. 27985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param eyear the extended year 28085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param month the zero-based month. The month is also determined 28185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * by reading the IS_LEAP_MONTH field. 28285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @return the Julian day number of the day before the first 28385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * day of the given month and year 28485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 28585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 28685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::handleComputeMonthStart(int32_t eyear, int32_t month, UBool useMonth) const { 28785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 28885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ChineseCalendar *nonConstThis = (ChineseCalendar*)this; // cast away const 28985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 29085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // If the month is out of range, adjust it into range, and 29185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // modify the extended year value accordingly. 29285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (month < 0 || month > 11) { 29385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho double m = month; 29485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho eyear += (int32_t)ClockMath::floorDivide(m, 12.0, m); 29585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho month = (int32_t)m; 29685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 29785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 29885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t gyear = eyear + CHINESE_EPOCH_YEAR - 1; // Gregorian year 29985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t theNewYear = newYear(gyear); 30085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t newMoon = newMoonNear(theNewYear + month * 29, TRUE); 30185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 30285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t julianDay = newMoon + kEpochStartAsJulianDay; 30385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 30485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Save fields for later restoration 30585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t saveMonth = internalGet(UCAL_MONTH); 30685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t saveIsLeapMonth = internalGet(UCAL_IS_LEAP_MONTH); 30785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 30885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Ignore IS_LEAP_MONTH field if useMonth is false 30985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t isLeapMonth = useMonth ? saveIsLeapMonth : 0; 31085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 31185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UErrorCode status = U_ZERO_ERROR; 31285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho nonConstThis->computeGregorianFields(julianDay, status); 31385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) 31485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return 0; 31585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 31685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // This will modify the MONTH and IS_LEAP_MONTH fields (only) 31785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho nonConstThis->computeChineseFields(newMoon, getGregorianYear(), 31885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho getGregorianMonth(), FALSE); 31985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 32085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (month != internalGet(UCAL_MONTH) || 32185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho isLeapMonth != internalGet(UCAL_IS_LEAP_MONTH)) { 32285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho newMoon = newMoonNear(newMoon + SYNODIC_GAP, TRUE); 32385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho julianDay = newMoon + kEpochStartAsJulianDay; 32485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 32585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 32685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho nonConstThis->internalSet(UCAL_MONTH, saveMonth); 32785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho nonConstThis->internalSet(UCAL_IS_LEAP_MONTH, saveIsLeapMonth); 32885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 32985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return julianDay - 1; 33085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 33185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 33285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 33385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 33485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Override Calendar to handle leap months properly. 33585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 33685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 33785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::add(UCalendarDateFields field, int32_t amount, UErrorCode& status) { 33885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho switch (field) { 33985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho case UCAL_MONTH: 34085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (amount != 0) { 34185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t dom = get(UCAL_DAY_OF_MONTH, status); 34285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) break; 34385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t day = get(UCAL_JULIAN_DAY, status) - kEpochStartAsJulianDay; // Get local day 34485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) break; 34585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t moon = day - dom + 1; // New moon 34685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho offsetMonth(moon, dom, amount); 34785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 34885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho break; 34985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho default: 35085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho Calendar::add(field, amount, status); 35185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho break; 35285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 35385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 35485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 35585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 35685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Override Calendar to handle leap months properly. 35785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 35885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 35985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::add(EDateFields field, int32_t amount, UErrorCode& status) { 36085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho add((UCalendarDateFields)field, amount, status); 36185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 36285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 36385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 36485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Override Calendar to handle leap months properly. 36585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 36685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 36785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::roll(UCalendarDateFields field, int32_t amount, UErrorCode& status) { 36885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho switch (field) { 36985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho case UCAL_MONTH: 37085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (amount != 0) { 37185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t dom = get(UCAL_DAY_OF_MONTH, status); 37285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) break; 37385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t day = get(UCAL_JULIAN_DAY, status) - kEpochStartAsJulianDay; // Get local day 37485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) break; 37585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t moon = day - dom + 1; // New moon (start of this month) 37685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 37785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Note throughout the following: Months 12 and 1 are never 37885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // followed by a leap month (D&R p. 185). 37985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 38085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Compute the adjusted month number m. This is zero-based 38185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // value from 0..11 in a non-leap year, and from 0..12 in a 38285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // leap year. 38385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t m = get(UCAL_MONTH, status); // 0-based month 38485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) break; 38585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (isLeapYear) { // (member variable) 38685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (get(UCAL_IS_LEAP_MONTH, status) == 1) { 38785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ++m; 38885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } else { 38985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Check for a prior leap month. (In the 39085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // following, month 0 is the first month of the 39185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // year.) Month 0 is never followed by a leap 39285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // month, and we know month m is not a leap month. 39385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // moon1 will be the start of month 0 if there is 39485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // no leap month between month 0 and month m; 39585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // otherwise it will be the start of month 1. 39685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int moon1 = moon - 39785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho (int) (CalendarAstronomer::SYNODIC_MONTH * (m - 0.5)); 39885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho moon1 = newMoonNear(moon1, TRUE); 39985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (isLeapMonthBetween(moon1, moon)) { 40085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ++m; 40185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 40285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 40385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) break; 40485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 40585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 40685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Now do the standard roll computation on m, with the 40785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // allowed range of 0..n-1, where n is 12 or 13. 40885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t n = isLeapYear ? 13 : 12; // Months in this year 40985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t newM = (m + amount) % n; 41085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (newM < 0) { 41185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho newM += n; 41285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 41385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 41485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (newM != m) { 41585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho offsetMonth(moon, dom, newM - m); 41685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 41785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 41885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho break; 41985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho default: 42085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho Calendar::roll(field, amount, status); 42185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho break; 42285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 42385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 42485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 42585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::roll(EDateFields field, int32_t amount, UErrorCode& status) { 42685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho roll((UCalendarDateFields)field, amount, status); 42785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 42885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 42985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 43085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 43185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Support methods and constants 43285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 43385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 43485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 43585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Convert local days to UTC epoch milliseconds. 43685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param days days after January 1, 1970 0:00 Asia/Shanghai 43785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @return milliseconds after January 1, 1970 0:00 GMT 43885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 43985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hodouble ChineseCalendar::daysToMillis(double days) { 44085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return (days * kOneDay) - CHINA_OFFSET; 44185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 44285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 44385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 44485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Convert UTC epoch milliseconds to local days. 44585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param millis milliseconds after January 1, 1970 0:00 GMT 44685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @return days after January 1, 1970 0:00 Asia/Shanghai 44785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 44885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hodouble ChineseCalendar::millisToDays(double millis) { 44985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return ClockMath::floorDivide(millis + CHINA_OFFSET, kOneDay); 45085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 45185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 45285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 45385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Astronomical computations 45485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 45585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 45685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 45785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 45885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return the major solar term on or after December 15 of the given 45985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Gregorian year, that is, the winter solstice of the given year. 46085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Computations are relative to Asia/Shanghai time zone. 46185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param gyear a Gregorian year 46285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @return days after January 1, 1970 0:00 Asia/Shanghai of the 46385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * winter solstice of the given year 46485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 46585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::winterSolstice(int32_t gyear) const { 46685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 46785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UErrorCode status = U_ZERO_ERROR; 46885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t cacheValue = CalendarCache::get(&gChineseCalendarWinterSolsticeCache, gyear, status); 46985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 47085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (cacheValue == 0) { 47185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // In books December 15 is used, but it fails for some years 47285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // using our algorithms, e.g.: 1298 1391 1492 1553 1560. That 47385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // is, winterSolstice(1298) starts search at Dec 14 08:00:00 47485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // PST 1298 with a final result of Dec 14 10:31:59 PST 1299. 47585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho double ms = daysToMillis(Grego::fieldsToDay(gyear, UCAL_DECEMBER, 1)); 47685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 47785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_lock(&astroLock); 47885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if(gChineseCalendarAstro == NULL) { 47985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro = new CalendarAstronomer(); 48085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ucln_i18n_registerCleanup(UCLN_I18N_CHINESE_CALENDAR, calendar_chinese_cleanup); 48185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 48285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro->setTime(ms); 48385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UDate solarLong = gChineseCalendarAstro->getSunTime(CalendarAstronomer::WINTER_SOLSTICE(), TRUE); 48485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_unlock(&astroLock); 48585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 48685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Winter solstice is 270 degrees solar longitude aka Dongzhi 48785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho cacheValue = (int32_t)millisToDays(solarLong); 48885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho CalendarCache::put(&gChineseCalendarWinterSolsticeCache, gyear, cacheValue, status); 48985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 49085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if(U_FAILURE(status)) { 49185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho cacheValue = 0; 49285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 49385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return cacheValue; 49485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 49585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 49685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 49785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return the closest new moon to the given date, searching either 49885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * forward or backward in time. 49985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param days days after January 1, 1970 0:00 Asia/Shanghai 50085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param after if true, search for a new moon on or after the given 50185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * date; otherwise, search for a new moon before it 50285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @return days after January 1, 1970 0:00 Asia/Shanghai of the nearest 50385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * new moon after or before <code>days</code> 50485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 50585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::newMoonNear(double days, UBool after) const { 50685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 50785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_lock(&astroLock); 50885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if(gChineseCalendarAstro == NULL) { 50985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro = new CalendarAstronomer(); 51085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ucln_i18n_registerCleanup(UCLN_I18N_CHINESE_CALENDAR, calendar_chinese_cleanup); 51185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 51285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro->setTime(daysToMillis(days)); 51385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UDate newMoon = gChineseCalendarAstro->getMoonTime(CalendarAstronomer::NEW_MOON(), after); 51485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_unlock(&astroLock); 51585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 51685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return (int32_t) millisToDays(newMoon); 51785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 51885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 51985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 52085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return the nearest integer number of synodic months between 52185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * two dates. 52285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param day1 days after January 1, 1970 0:00 Asia/Shanghai 52385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param day2 days after January 1, 1970 0:00 Asia/Shanghai 52485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @return the nearest integer number of months between day1 and day2 52585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 52685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::synodicMonthsBetween(int32_t day1, int32_t day2) const { 52785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho double roundme = ((day2 - day1) / CalendarAstronomer::SYNODIC_MONTH); 52885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return (int32_t) (roundme + (roundme >= 0 ? .5 : -.5)); 52985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 53085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 53185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 53285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return the major solar term on or before a given date. This 53385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * will be an integer from 1..12, with 1 corresponding to 330 degrees, 53485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 2 to 0 degrees, 3 to 30 degrees,..., and 12 to 300 degrees. 53585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param days days after January 1, 1970 0:00 Asia/Shanghai 53685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 53785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::majorSolarTerm(int32_t days) const { 53885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 53985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_lock(&astroLock); 54085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if(gChineseCalendarAstro == NULL) { 54185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro = new CalendarAstronomer(); 54285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ucln_i18n_registerCleanup(UCLN_I18N_CHINESE_CALENDAR, calendar_chinese_cleanup); 54385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 54485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro->setTime(daysToMillis(days)); 54585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UDate solarLongitude = gChineseCalendarAstro->getSunLongitude(); 54685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_unlock(&astroLock); 54785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 54885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Compute (floor(solarLongitude / (pi/6)) + 2) % 12 54985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t term = ( ((int32_t)(6 * solarLongitude / CalendarAstronomer::PI)) + 2 ) % 12; 55085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (term < 1) { 55185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho term += 12; 55285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 55385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return term; 55485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 55585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 55685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 55785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return true if the given month lacks a major solar term. 55885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param newMoon days after January 1, 1970 0:00 Asia/Shanghai of a new 55985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * moon 56085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 56185bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUBool ChineseCalendar::hasNoMajorSolarTerm(int32_t newMoon) const { 56285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return majorSolarTerm(newMoon) == 56385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho majorSolarTerm(newMoonNear(newMoon + SYNODIC_GAP, TRUE)); 56485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 56585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 56685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 56785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 56885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Time to fields 56985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 57085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 57185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 57285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return true if there is a leap month on or after month newMoon1 and 57385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * at or before month newMoon2. 57485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param newMoon1 days after January 1, 1970 0:00 Asia/Shanghai of a 57585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * new moon 57685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param newMoon2 days after January 1, 1970 0:00 Asia/Shanghai of a 57785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * new moon 57885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 57985bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUBool ChineseCalendar::isLeapMonthBetween(int32_t newMoon1, int32_t newMoon2) const { 58085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 58185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#ifdef U_DEBUG_CHNSECAL 58285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // This is only needed to debug the timeOfAngle divergence bug. 58385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Remove this later. Liu 11/9/00 58485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (synodicMonthsBetween(newMoon1, newMoon2) >= 50) { 58585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho U_DEBUG_CHNSECAL_MSG(( 58685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho "isLeapMonthBetween(%d, %d): Invalid parameters", newMoon1, newMoon2 58785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho )); 58885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 58985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#endif 59085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 59185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return (newMoon2 >= newMoon1) && 59285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho (isLeapMonthBetween(newMoon1, newMoonNear(newMoon2 - SYNODIC_GAP, FALSE)) || 59385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho hasNoMajorSolarTerm(newMoon2)); 59485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 59585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 59685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 59785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Compute fields for the Chinese calendar system. This method can 59885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * either set all relevant fields, as required by 59985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <code>handleComputeFields()</code>, or it can just set the MONTH and 60085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * IS_LEAP_MONTH fields, as required by 60185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <code>handleComputeMonthStart()</code>. 60285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 60385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <p>As a side effect, this method sets {@link #isLeapYear}. 60485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param days days after January 1, 1970 0:00 Asia/Shanghai of the 60585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * date to compute fields for 60685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param gyear the Gregorian year of the given date 60785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param gmonth the Gregorian month of the given date 60885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param setAllFields if true, set the EXTENDED_YEAR, ERA, YEAR, 60985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * DAY_OF_MONTH, and DAY_OF_YEAR fields. In either case set the MONTH 61085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * and IS_LEAP_MONTH fields. 61185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 61285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::computeChineseFields(int32_t days, int32_t gyear, int32_t gmonth, 61385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UBool setAllFields) { 61485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 61585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Find the winter solstices before and after the target date. 61685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // These define the boundaries of this Chinese year, specifically, 61785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // the position of month 11, which always contains the solstice. 61885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // We want solsticeBefore <= date < solsticeAfter. 61985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t solsticeBefore; 62085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t solsticeAfter = winterSolstice(gyear); 62185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (days < solsticeAfter) { 62285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho solsticeBefore = winterSolstice(gyear - 1); 62385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } else { 62485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho solsticeBefore = solsticeAfter; 62585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho solsticeAfter = winterSolstice(gyear + 1); 62685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 62785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 62885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Find the start of the month after month 11. This will be either 62985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // the prior month 12 or leap month 11 (very rare). Also find the 63085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // start of the following month 11. 63185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t firstMoon = newMoonNear(solsticeBefore + 1, TRUE); 63285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t lastMoon = newMoonNear(solsticeAfter + 1, FALSE); 63385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t thisMoon = newMoonNear(days + 1, FALSE); // Start of this month 63485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Note: isLeapYear is a member variable 63585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho isLeapYear = synodicMonthsBetween(firstMoon, lastMoon) == 12; 63685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 63785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t month = synodicMonthsBetween(firstMoon, thisMoon); 63885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (isLeapYear && isLeapMonthBetween(firstMoon, thisMoon)) { 63985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho month--; 64085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 64185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (month < 1) { 64285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho month += 12; 64385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 64485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 64585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UBool isLeapMonth = isLeapYear && 64685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho hasNoMajorSolarTerm(thisMoon) && 64785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho !isLeapMonthBetween(firstMoon, newMoonNear(thisMoon - SYNODIC_GAP, FALSE)); 64885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 64985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_MONTH, month-1); // Convert from 1-based to 0-based 65085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_IS_LEAP_MONTH, isLeapMonth?1:0); 65185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 65285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (setAllFields) { 65385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 65485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t year = gyear - CHINESE_EPOCH_YEAR; 65585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (month < 11 || 65685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gmonth >= UCAL_JULY) { 65785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho year++; 65885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 65985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t dayOfMonth = days - thisMoon + 1; 66085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 66185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_EXTENDED_YEAR, year); 66285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 66385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // 0->0,60 1->1,1 60->1,60 61->2,1 etc. 66485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t yearOfCycle; 66585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t cycle = ClockMath::floorDivide(year - 1, 60, yearOfCycle); 66685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_ERA, cycle + 1); 66785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_YEAR, yearOfCycle + 1); 66885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 66985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_DAY_OF_MONTH, dayOfMonth); 67085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 67185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Days will be before the first new year we compute if this 67285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // date is in month 11, leap 11, 12. There is never a leap 12. 67385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // New year computations are cached so this should be cheap in 67485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // the long run. 67585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t theNewYear = newYear(gyear); 67685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (days < theNewYear) { 67785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho theNewYear = newYear(gyear-1); 67885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 67985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_DAY_OF_YEAR, days - theNewYear + 1); 68085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 68185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 68285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 68385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 68485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 68585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Fields to time 68685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 68785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 68885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 68985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return the Chinese new year of the given Gregorian year. 69085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param gyear a Gregorian year 69185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @return days after January 1, 1970 0:00 Asia/Shanghai of the 69285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Chinese new year of the given year (this will be a new moon) 69385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 69485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::newYear(int32_t gyear) const { 69585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UErrorCode status = U_ZERO_ERROR; 69685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t cacheValue = CalendarCache::get(&gChineseCalendarNewYearCache, gyear, status); 69785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 69885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (cacheValue == 0) { 69985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 70085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t solsticeBefore= winterSolstice(gyear - 1); 70185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t solsticeAfter = winterSolstice(gyear); 70285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t newMoon1 = newMoonNear(solsticeBefore + 1, TRUE); 70385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t newMoon2 = newMoonNear(newMoon1 + SYNODIC_GAP, TRUE); 70485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t newMoon11 = newMoonNear(solsticeAfter + 1, FALSE); 70585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 70685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (synodicMonthsBetween(newMoon1, newMoon11) == 12 && 70785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho (hasNoMajorSolarTerm(newMoon1) || hasNoMajorSolarTerm(newMoon2))) { 70885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho cacheValue = newMoonNear(newMoon2 + SYNODIC_GAP, TRUE); 70985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } else { 71085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho cacheValue = newMoon2; 71185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 71285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 71385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho CalendarCache::put(&gChineseCalendarNewYearCache, gyear, cacheValue, status); 71485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 71585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if(U_FAILURE(status)) { 71685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho cacheValue = 0; 71785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 71885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return cacheValue; 71985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 72085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 72185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 72285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Adjust this calendar to be delta months before or after a given 72385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * start position, pinning the day of month if necessary. The start 72485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * position is given as a local days number for the start of the month 72585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * and a day-of-month. Used by add() and roll(). 72685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param newMoon the local days of the first day of the month of the 72785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * start position (days after January 1, 1970 0:00 Asia/Shanghai) 72885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param dom the 1-based day-of-month of the start position 72985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param delta the number of months to move forward or backward from 73085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * the start position 73185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 73285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::offsetMonth(int32_t newMoon, int32_t dom, int32_t delta) { 73385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UErrorCode status = U_ZERO_ERROR; 73485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 73585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Move to the middle of the month before our target month. 73685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho newMoon += (int32_t) (CalendarAstronomer::SYNODIC_MONTH * (delta - 0.5)); 73785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 73885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Search forward to the target month's new moon 73985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho newMoon = newMoonNear(newMoon, TRUE); 74085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 74185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Find the target dom 74285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t jd = newMoon + kEpochStartAsJulianDay - 1 + dom; 74385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 74485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Pin the dom. In this calendar all months are 29 or 30 days 74585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // so pinning just means handling dom 30. 74685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (dom > 29) { 74785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho set(UCAL_JULIAN_DAY, jd-1); 74885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // TODO Fix this. We really shouldn't ever have to 74985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // explicitly call complete(). This is either a bug in 75085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // this method, in ChineseCalendar, or in 75185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Calendar.getActualMaximum(). I suspect the last. 75285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho complete(status); 75385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) return; 75485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (getActualMaximum(UCAL_DAY_OF_MONTH, status) >= dom) { 75585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) return; 75685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho set(UCAL_JULIAN_DAY, jd); 75785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 75885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } else { 75985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho set(UCAL_JULIAN_DAY, jd); 76085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 76185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 76285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 76385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 76485bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUBool 76585bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoChineseCalendar::inDaylightTime(UErrorCode& status) const 76685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 76785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // copied from GregorianCalendar 76885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status) || !getTimeZone().useDaylightTime()) 76985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return FALSE; 77085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 77185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Force an update of the state of the Calendar. 77285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ((ChineseCalendar*)this)->complete(status); // cast away const 77385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 77485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE); 77585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 77685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 77785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// default century 77885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoconst UDate ChineseCalendar::fgSystemDefaultCentury = DBL_MIN; 77985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoconst int32_t ChineseCalendar::fgSystemDefaultCenturyYear = -1; 78085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 78185bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUDate ChineseCalendar::fgSystemDefaultCenturyStart = DBL_MIN; 78285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::fgSystemDefaultCenturyStartYear = -1; 78385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 78485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 78585bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUBool ChineseCalendar::haveDefaultCentury() const 78685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 78785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return TRUE; 78885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 78985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 79085bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUDate ChineseCalendar::defaultCenturyStart() const 79185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 79285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return internalGetDefaultCenturyStart(); 79385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 79485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 79585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::defaultCenturyStartYear() const 79685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 79785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return internalGetDefaultCenturyStartYear(); 79885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 79985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 80085bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUDate 80185bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoChineseCalendar::internalGetDefaultCenturyStart() const 80285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 80385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // lazy-evaluate systemDefaultCenturyStart 80485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UBool needsUpdate; 80585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UMTX_CHECK(NULL, (fgSystemDefaultCenturyStart == fgSystemDefaultCentury), needsUpdate); 80685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 80785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (needsUpdate) { 80885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho initializeSystemDefaultCentury(); 80985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 81085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 81185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // use defaultCenturyStart unless it's the flag value; 81285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // then use systemDefaultCenturyStart 81385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 81485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return fgSystemDefaultCenturyStart; 81585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 81685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 81785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t 81885bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoChineseCalendar::internalGetDefaultCenturyStartYear() const 81985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 82085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // lazy-evaluate systemDefaultCenturyStartYear 82185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UBool needsUpdate; 82285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UMTX_CHECK(NULL, (fgSystemDefaultCenturyStart == fgSystemDefaultCentury), needsUpdate); 82385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 82485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (needsUpdate) { 82585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho initializeSystemDefaultCentury(); 82685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 82785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 82885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // use defaultCenturyStart unless it's the flag value; 82985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // then use systemDefaultCenturyStartYear 83085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 83185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return fgSystemDefaultCenturyStartYear; 83285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 83385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 83485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid 83585bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoChineseCalendar::initializeSystemDefaultCentury() 83685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 83785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // initialize systemDefaultCentury and systemDefaultCenturyYear based 83885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // on the current time. They'll be set to 80 years before 83985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // the current time. 84085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UErrorCode status = U_ZERO_ERROR; 84185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ChineseCalendar calendar(Locale("@calendar=chinese"),status); 84285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_SUCCESS(status)) 84385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 84485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho calendar.setTime(Calendar::getNow(), status); 84585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho calendar.add(UCAL_YEAR, -80, status); 84685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UDate newStart = calendar.getTime(status); 84785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t newYear = calendar.get(UCAL_YEAR, status); 84885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_lock(NULL); 84985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (fgSystemDefaultCenturyStart == fgSystemDefaultCentury) 85085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 85185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho fgSystemDefaultCenturyStartYear = newYear; 85285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho fgSystemDefaultCenturyStart = newStart; 85385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 85485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_unlock(NULL); 85585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 85685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // We have no recourse upon failure unless we want to propagate the failure 85785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // out. 85885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 85985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 86085bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUOBJECT_DEFINE_RTTI_IMPLEMENTATION(ChineseCalendar) 86185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 86285bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoU_NAMESPACE_END 86385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 86485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#endif 865ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 866