diff -r 000000000000 -r 6474c204b198 intl/icu/source/i18n/islamcal.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/intl/icu/source/i18n/islamcal.cpp Wed Dec 31 06:09:35 2014 +0100 @@ -0,0 +1,678 @@ +/* +****************************************************************************** +* Copyright (C) 2003-2013, International Business Machines Corporation +* and others. All Rights Reserved. +****************************************************************************** +* +* File ISLAMCAL.H +* +* Modification History: +* +* Date Name Description +* 10/14/2003 srl ported from java IslamicCalendar +***************************************************************************** +*/ + +#include "islamcal.h" + +#if !UCONFIG_NO_FORMATTING + +#include "umutex.h" +#include +#include "gregoimp.h" // Math +#include "astro.h" // CalendarAstronomer +#include "uhash.h" +#include "ucln_in.h" +#include "uassert.h" + +static const UDate HIJRA_MILLIS = -42521587200000.0; // 7/16/622 AD 00:00 + +// Debugging +#ifdef U_DEBUG_ISLAMCAL +# include +# include +static void debug_islamcal_loc(const char *f, int32_t l) +{ + fprintf(stderr, "%s:%d: ", f, l); +} + +static void debug_islamcal_msg(const char *pat, ...) +{ + va_list ap; + va_start(ap, pat); + vfprintf(stderr, pat, ap); + fflush(stderr); +} +// must use double parens, i.e.: U_DEBUG_ISLAMCAL_MSG(("four is: %d",4)); +#define U_DEBUG_ISLAMCAL_MSG(x) {debug_islamcal_loc(__FILE__,__LINE__);debug_islamcal_msg x;} +#else +#define U_DEBUG_ISLAMCAL_MSG(x) +#endif + + +// --- The cache -- +// cache of months +static UMutex astroLock = U_MUTEX_INITIALIZER; // pod bay door lock +static icu::CalendarCache *gMonthCache = NULL; +static icu::CalendarAstronomer *gIslamicCalendarAstro = NULL; + +U_CDECL_BEGIN +static UBool calendar_islamic_cleanup(void) { + if (gMonthCache) { + delete gMonthCache; + gMonthCache = NULL; + } + if (gIslamicCalendarAstro) { + delete gIslamicCalendarAstro; + gIslamicCalendarAstro = NULL; + } + return TRUE; +} +U_CDECL_END + +U_NAMESPACE_BEGIN + +// Implementation of the IslamicCalendar class + +/** + * Friday EPOC + */ +static const int32_t CIVIL_EPOC = 1948440; + +/** + * Thursday EPOC + */ +static const int32_t ASTRONOMICAL_EPOC = 1948439; + + +static const int32_t UMALQURA_YEAR_START = 1318; +static const int32_t UMALQURA_YEAR_END = 1480; + +static const int UMALQURA_MONTHLENGTH[] = { + //* 1318 -1322 */ "0101 0111 0100", "1001 0111 0110", "0100 1011 0111", "0010 0101 0111", "0101 0010 1011", + 0x0574, 0x0975, 0x06A7, 0x0257, 0x052B, + //* 1323 -1327 */ "0110 1001 0101", "0110 1100 1010", "1010 1101 0101", "0101 0101 1011", "0010 0101 1101", + 0x0695, 0x06CA, 0x0AD5, 0x055B, 0x025B, + //* 1328 -1332 */ "1001 0010 1101", "1100 1001 0101", "1101 0100 1010", "1110 1010 0101", "0110 1101 0010", + 0x092D, 0x0C95, 0x0D4A, 0x0E5B, 0x025B, + //* 1333 -1337 */ "1010 1101 0101", "0101 0101 1010", "1010 1010 1011", "0100 0100 1011", "0110 1010 0101", + 0x0AD5, 0x055A, 0x0AAB, 0x044B, 0x06A5, + //* 1338 -1342 */ "0111 0101 0010", "1011 1010 1001", "0011 0111 0100", "1010 1011 0110", "0101 0101 0110", + 0x0752, 0x0BA9, 0x0374, 0x0AB6, 0x0556, + //* 1343 -1347 */ "1010 1010 1010", "1101 0101 0010", "1101 1010 1001", "0101 1101 0100", "1010 1110 1010", + 0x0AAA, 0x0D52, 0x0DA9, 0x05D4, 0x0AEA, + //* 1348 -1352 */ "0100 1101 1101", "0010 0110 1110", "1001 0010 1110", "1010 1010 0110", "1101 0101 0100", + 0x04DD, 0x026E, 0x092E, 0x0AA6, 0x0D54, + //* 1353 -1357 */ "0101 1010 1010", "0101 1011 0101", "0010 1011 0100", "1001 0011 0111", "0100 1001 1011", + 0x05AA, 0x05B5, 0x02B4, 0x0937, 0x049B, + //* 1358 -1362 */ "1010 0100 1011", "1011 0010 0101", "1011 0101 0100", "1011 0110 1010", "0101 0110 1101", + 0x0A4B, 0x0B25, 0x0B54, 0x0B6A, 0x056D, + //* 1363 -1367 */ "0100 1010 1101", "1010 0101 0101", "1101 0010 0101", "1110 1001 0010", "1110 1100 1001", + 0x04AD, 0x0A55, 0x0D25, 0x0E92, 0x0EC9, + //* 1368 -1372 */ "0110 1101 0100", "1010 1110 1010", "0101 0110 1011", "0100 1010 1011", "0110 1000 0101", + 0x06D4, 0x0ADA, 0x056B, 0x04AB, 0x0685, + //* 1373 -1377 */ "1011 0100 1001", "1011 1010 0100", "1011 1011 0010", "0101 1011 0101", "0010 1011 1010", + 0x0B49, 0x0BA4, 0x0BB2, 0x05B5, 0x02BA, + //* 1378 -1382 */ "1001 0101 1011", "0100 1010 1011", "0101 0101 0101", "0110 1011 0010", "0110 1101 1001", + 0x095B, 0x04AB, 0x0555, 0x06B2, 0x06D9, + //* 1383 -1387 */ "0010 1110 1100", "1001 0110 1110", "0100 1010 1110", "1010 0101 0110", "1101 0010 1010", + 0x02EC, 0x096E, 0x04AE, 0x0A56, 0x0D2A, + //* 1388 -1392 */ "1101 0101 0101", "0101 1010 1010", "1010 1011 0101", "0100 1011 1011", "0000 0101 1011", + 0x0D55, 0x05AA, 0x0AB5, 0x04BB, 0x005B, + //* 1393 -1397 */ "1001 0010 1011", "1010 1001 0101", "0011 0100 1010", "1011 1010 0101", "0101 1010 1010", + 0x092B, 0x0A95, 0x034A, 0x0BA5, 0x05AA, + //* 1398 -1402 */ "1010 1011 0101", "0101 0101 0110", "1010 1001 0110", "1101 0100 1010", "1110 1010 0101", + 0x0AB5, 0x0556, 0x0A96, 0x0B4A, 0x0EA5, + //* 1403 -1407 */ "0111 0101 0010", "0110 1110 1001", "0011 0110 1010", "1010 1010 1101", "0101 0101 0101", + 0x0752, 0x06E9, 0x036A, 0x0AAD, 0x0555, + //* 1408 -1412 */ "1010 1010 0101", "1011 0101 0010", "1011 1010 1001", "0101 1011 0100", "1001 1011 1010", + 0x0AA5, 0x0B52, 0x0BA9, 0x05B4, 0x09BA, + //* 1413 -1417 */ "0100 1101 1011", "0010 0101 1101", "0101 0010 1101", "1010 1010 0101", "1010 1101 0100", + 0x04DB, 0x025D, 0x052D, 0x0AA5, 0x0AD4, + //* 1418 -1422 */ "1010 1110 1010", "0101 0110 1101", "0100 1011 1101", "0010 0011 1101", "1001 0001 1101", + 0x0AEA, 0x056D, 0x04BD, 0x023D, 0x091D, + //* 1423 -1427 */ "1010 1001 0101", "1011 0100 1010", "1011 0101 1010", "0101 0110 1101", "0010 1011 0110", + 0x0A95, 0x0B4A, 0x0B5A, 0x056D, 0x02B6, + //* 1428 -1432 */ "1001 0011 1011", "0100 1001 1011", "0110 0101 0101", "0110 1010 1001", "0111 0101 0100", + 0x093B, 0x049B, 0x0655, 0x06A9, 0x0754, + //* 1433 -1437 */ "1011 0110 1010", "0101 0110 1100", "1010 1010 1101", "0101 0101 0101", "1011 0010 1001", + 0x0B6A, 0x056C, 0x0AAD, 0x0555, 0x0B29, + //* 1438 -1442 */ "1011 1001 0010", "1011 1010 1001", "0101 1101 0100", "1010 1101 1010", "0101 0101 1010", + 0x0B92, 0x0BA9, 0x05D4, 0x0ADA, 0x055A, + //* 1443 -1447 */ "1010 1010 1011", "0101 1001 0101", "0111 0100 1001", "0111 0110 0100", "1011 1010 1010", + 0x0AAB, 0x0595, 0x0749, 0x0764, 0x0BAA, + //* 1448 -1452 */ "0101 1011 0101", "0010 1011 0110", "1010 0101 0110", "1110 0100 1101", "1011 0010 0101", + 0x05B5, 0x02B6, 0x0A56, 0x0E4D, 0x0B25, + //* 1453 -1457 */ "1011 0101 0010", "1011 0110 1010", "0101 1010 1101", "0010 1010 1110", "1001 0010 1111", + 0x0B52, 0x0B6A, 0x05AD, 0x02AE, 0x092F, + //* 1458 -1462 */ "0100 1001 0111", "0110 0100 1011", "0110 1010 0101", "0110 1010 1100", "1010 1101 0110", + 0x0497, 0x064B, 0x06A5, 0x06AC, 0x0AD6, + //* 1463 -1467 */ "0101 0101 1101", "0100 1001 1101", "1010 0100 1101", "1101 0001 0110", "1101 1001 0101", + 0x055D, 0x049D, 0x0A4D, 0x0D16, 0x0D95, + //* 1468 -1472 */ "0101 1010 1010", "0101 1011 0101", "0010 1001 1010", "1001 0101 1011", "0100 1010 1100", + 0x05AA, 0x05B5, 0x029A, 0x095B, 0x04AC, + //* 1473 -1477 */ "0101 1001 0101", "0110 1100 1010", "0110 1110 0100", "1010 1110 1010", "0100 1111 0101", + 0x0595, 0x06CA, 0x06E4, 0x0AEA, 0x04F5, + //* 1478 -1480 */ "0010 1011 0110", "1001 0101 0110", "1010 1010 1010" + 0x02B6, 0x0956, 0x0AAA +}; + +int32_t getUmalqura_MonthLength(int32_t y, int32_t m) { + int32_t mask = (int32_t) (0x01 << (11 - m)); // set mask for bit corresponding to month + if((UMALQURA_MONTHLENGTH[y] & mask) == 0 ) + return 29; + else + return 30; + +} + +//------------------------------------------------------------------------- +// Constructors... +//------------------------------------------------------------------------- + +const char *IslamicCalendar::getType() const { + const char *sType = NULL; + + switch (cType) { + case CIVIL: + sType = "islamic-civil"; + break; + case ASTRONOMICAL: + sType = "islamic"; + break; + case TBLA: + sType = "islamic-tbla"; + break; + case UMALQURA: + sType = "islamic-umalqura"; + break; + default: + U_ASSERT(false); // out of range + sType = "islamic"; // "islamic" is used as the generic type + break; + } + return sType; +} + +Calendar* IslamicCalendar::clone() const { + return new IslamicCalendar(*this); +} + +IslamicCalendar::IslamicCalendar(const Locale& aLocale, UErrorCode& success, ECalculationType type) +: Calendar(TimeZone::createDefault(), aLocale, success), +cType(type) +{ + setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly. +} + +IslamicCalendar::IslamicCalendar(const IslamicCalendar& other) : Calendar(other), cType(other.cType) { +} + +IslamicCalendar::~IslamicCalendar() +{ +} + +void IslamicCalendar::setCalculationType(ECalculationType type, UErrorCode &status) +{ + if (cType != type) { + // The fields of the calendar will become invalid, because the calendar + // rules are different + UDate m = getTimeInMillis(status); + cType = type; + clear(); + setTimeInMillis(m, status); + } +} + +/** +* Returns true if this object is using the fixed-cycle civil +* calendar, or false if using the religious, astronomical +* calendar. +* @draft ICU 2.4 +*/ +UBool IslamicCalendar::isCivil() { + return (cType == CIVIL); +} + +//------------------------------------------------------------------------- +// Minimum / Maximum access functions +//------------------------------------------------------------------------- + +// Note: Current IslamicCalendar implementation does not work +// well with negative years. + +// TODO: In some cases the current ICU Islamic calendar implementation shows +// a month as having 31 days. Since date parsing now uses range checks based +// on the table below, we need to change the range for last day of month to +// include 31 as a workaround until the implementation is fixed. +static const int32_t LIMITS[UCAL_FIELD_COUNT][4] = { + // Minimum Greatest Least Maximum + // Minimum Maximum + { 0, 0, 0, 0}, // ERA + { 1, 1, 5000000, 5000000}, // YEAR + { 0, 0, 11, 11}, // MONTH + { 1, 1, 50, 51}, // WEEK_OF_YEAR + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH + { 1, 1, 29, 31}, // DAY_OF_MONTH - 31 to workaround for cal implementation bug, should be 30 + { 1, 1, 354, 355}, // DAY_OF_YEAR + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK + { -1, -1, 5, 5}, // DAY_OF_WEEK_IN_MONTH + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET + { 1, 1, 5000000, 5000000}, // YEAR_WOY + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL + { 1, 1, 5000000, 5000000}, // EXTENDED_YEAR + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECONDS_IN_DAY + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // IS_LEAP_MONTH +}; + +/** +* @draft ICU 2.4 +*/ +int32_t IslamicCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const { + return LIMITS[field][limitType]; +} + +//------------------------------------------------------------------------- +// Assorted calculation utilities +// + +/** +* Determine whether a year is a leap year in the Islamic civil calendar +*/ +UBool IslamicCalendar::civilLeapYear(int32_t year) +{ + return (14 + 11 * year) % 30 < 11; +} + +/** +* Return the day # on which the given year starts. Days are counted +* from the Hijri epoch, origin 0. +*/ +int32_t IslamicCalendar::yearStart(int32_t year) const{ + if (cType == CIVIL || cType == TBLA || + (cType == UMALQURA && year < UMALQURA_YEAR_START)) + { + return (year-1)*354 + ClockMath::floorDivide((3+11*year),30); + } else if(cType==ASTRONOMICAL){ + return trueMonthStart(12*(year-1)); + } else { + int32_t ys = yearStart(UMALQURA_YEAR_START-1); + ys+= handleGetYearLength(UMALQURA_YEAR_START-1); + for(int i=UMALQURA_YEAR_START; i< year; i++){ + ys+= handleGetYearLength(i); + } + return ys; + } +} + +/** +* Return the day # on which the given month starts. Days are counted +* from the Hijri epoch, origin 0. +* +* @param year The hijri year +* @param year The hijri month, 0-based +*/ +int32_t IslamicCalendar::monthStart(int32_t year, int32_t month) const { + if (cType == CIVIL || cType == TBLA) { + return (int32_t)uprv_ceil(29.5*month) + + (year-1)*354 + (int32_t)ClockMath::floorDivide((3+11*year),30); + } else if(cType==ASTRONOMICAL){ + return trueMonthStart(12*(year-1) + month); + } else { + int32_t ms = yearStart(year); + for(int i=0; i< month; i++){ + ms+= handleGetMonthLength(year, i); + } + return ms; + } +} + +/** +* Find the day number on which a particular month of the true/lunar +* Islamic calendar starts. +* +* @param month The month in question, origin 0 from the Hijri epoch +* +* @return The day number on which the given month starts. +*/ +int32_t IslamicCalendar::trueMonthStart(int32_t month) const +{ + UErrorCode status = U_ZERO_ERROR; + int32_t start = CalendarCache::get(&gMonthCache, month, status); + + if (start==0) { + // Make a guess at when the month started, using the average length + UDate origin = HIJRA_MILLIS + + uprv_floor(month * CalendarAstronomer::SYNODIC_MONTH) * kOneDay; + + // moonAge will fail due to memory allocation error + double age = moonAge(origin, status); + if (U_FAILURE(status)) { + goto trueMonthStartEnd; + } + + if (age >= 0) { + // The month has already started + do { + origin -= kOneDay; + age = moonAge(origin, status); + if (U_FAILURE(status)) { + goto trueMonthStartEnd; + } + } while (age >= 0); + } + else { + // Preceding month has not ended yet. + do { + origin += kOneDay; + age = moonAge(origin, status); + if (U_FAILURE(status)) { + goto trueMonthStartEnd; + } + } while (age < 0); + } + start = (int32_t)ClockMath::floorDivide((origin - HIJRA_MILLIS), (double)kOneDay) + 1; + CalendarCache::put(&gMonthCache, month, start, status); + } +trueMonthStartEnd : + if(U_FAILURE(status)) { + start = 0; + } + return start; +} + +/** +* Return the "age" of the moon at the given time; this is the difference +* in ecliptic latitude between the moon and the sun. This method simply +* calls CalendarAstronomer.moonAge, converts to degrees, +* and adjusts the result to be in the range [-180, 180]. +* +* @param time The time at which the moon's age is desired, +* in millis since 1/1/1970. +*/ +double IslamicCalendar::moonAge(UDate time, UErrorCode &status) +{ + double age = 0; + + umtx_lock(&astroLock); + if(gIslamicCalendarAstro == NULL) { + gIslamicCalendarAstro = new CalendarAstronomer(); + if (gIslamicCalendarAstro == NULL) { + status = U_MEMORY_ALLOCATION_ERROR; + return age; + } + ucln_i18n_registerCleanup(UCLN_I18N_ISLAMIC_CALENDAR, calendar_islamic_cleanup); + } + gIslamicCalendarAstro->setTime(time); + age = gIslamicCalendarAstro->getMoonAge(); + umtx_unlock(&astroLock); + + // Convert to degrees and normalize... + age = age * 180 / CalendarAstronomer::PI; + if (age > 180) { + age = age - 360; + } + + return age; +} + +//---------------------------------------------------------------------- +// Calendar framework +//---------------------------------------------------------------------- + +/** +* Return the length (in days) of the given month. +* +* @param year The hijri year +* @param year The hijri month, 0-based +* @draft ICU 2.4 +*/ +int32_t IslamicCalendar::handleGetMonthLength(int32_t extendedYear, int32_t month) const { + + int32_t length = 0; + + if (cType == CIVIL || cType == TBLA || + (cType == UMALQURA && (extendedYearUMALQURA_YEAR_END)) ) { + length = 29 + (month+1) % 2; + if (month == DHU_AL_HIJJAH && civilLeapYear(extendedYear)) { + length++; + } + } else if(cType == ASTRONOMICAL){ + month = 12*(extendedYear-1) + month; + length = trueMonthStart(month+1) - trueMonthStart(month) ; + } else { + length = getUmalqura_MonthLength(extendedYear - UMALQURA_YEAR_START, month); + } + return length; +} + +/** +* Return the number of days in the given Islamic year +* @draft ICU 2.4 +*/ +int32_t IslamicCalendar::handleGetYearLength(int32_t extendedYear) const { + if (cType == CIVIL || cType == TBLA || + (cType == UMALQURA && (extendedYearUMALQURA_YEAR_END)) ) { + return 354 + (civilLeapYear(extendedYear) ? 1 : 0); + } else if(cType == ASTRONOMICAL){ + int32_t month = 12*(extendedYear-1); + return (trueMonthStart(month + 12) - trueMonthStart(month)); + } else { + int len = 0; + for(int i=0; i<12; i++) + len += handleGetMonthLength(extendedYear, i); + return len; + } +} + +//------------------------------------------------------------------------- +// Functions for converting from field values to milliseconds.... +//------------------------------------------------------------------------- + +// Return JD of start of given month/year +/** +* @draft ICU 2.4 +*/ +int32_t IslamicCalendar::handleComputeMonthStart(int32_t eyear, int32_t month, UBool /* useMonth */) const { + return monthStart(eyear, month) + 1948439; +} + +//------------------------------------------------------------------------- +// Functions for converting from milliseconds to field values +//------------------------------------------------------------------------- + +/** +* @draft ICU 2.4 +*/ +int32_t IslamicCalendar::handleGetExtendedYear() { + int32_t year; + if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) { + year = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1 + } else { + year = internalGet(UCAL_YEAR, 1); // Default to year 1 + } + return year; +} + +/** +* Override Calendar to compute several fields specific to the Islamic +* calendar system. These are: +* +*
  • ERA +*
  • YEAR +*
  • MONTH +*
  • DAY_OF_MONTH +*
  • DAY_OF_YEAR +*
  • EXTENDED_YEAR
+* +* The DAY_OF_WEEK and DOW_LOCAL fields are already set when this +* method is called. The getGregorianXxx() methods return Gregorian +* calendar equivalents for the given Julian day. +* @draft ICU 2.4 +*/ +void IslamicCalendar::handleComputeFields(int32_t julianDay, UErrorCode &status) { + int32_t year, month, dayOfMonth, dayOfYear; + UDate startDate; + int32_t days = julianDay - CIVIL_EPOC; + + if (cType == CIVIL || cType == TBLA) { + if(cType == TBLA) + days = julianDay - ASTRONOMICAL_EPOC; + // Use the civil calendar approximation, which is just arithmetic + year = (int)ClockMath::floorDivide( (double)(30 * days + 10646) , 10631.0 ); + month = (int32_t)uprv_ceil((days - 29 - yearStart(year)) / 29.5 ); + month = month<11?month:11; + startDate = monthStart(year, month); + } else if(cType == ASTRONOMICAL){ + // Guess at the number of elapsed full months since the epoch + int32_t months = (int32_t)uprv_floor((double)days / CalendarAstronomer::SYNODIC_MONTH); + + startDate = uprv_floor(months * CalendarAstronomer::SYNODIC_MONTH); + + double age = moonAge(internalGetTime(), status); + if (U_FAILURE(status)) { + status = U_MEMORY_ALLOCATION_ERROR; + return; + } + if ( days - startDate >= 25 && age > 0) { + // If we're near the end of the month, assume next month and search backwards + months++; + } + + // Find out the last time that the new moon was actually visible at this longitude + // This returns midnight the night that the moon was visible at sunset. + while ((startDate = trueMonthStart(months)) > days) { + // If it was after the date in question, back up a month and try again + months--; + } + + year = months / 12 + 1; + month = months % 12; + } else if(cType == UMALQURA) { + int32_t umalquraStartdays = yearStart(UMALQURA_YEAR_START) ; + if( days < umalquraStartdays){ + //Use Civil calculation + year = (int)ClockMath::floorDivide( (double)(30 * days + 10646) , 10631.0 ); + month = (int32_t)uprv_ceil((days - 29 - yearStart(year)) / 29.5 ); + month = month<11?month:11; + startDate = monthStart(year, month); + }else{ + int y =UMALQURA_YEAR_START-1, m =0; + long d = 1; + while(d > 0){ + y++; + d = days - yearStart(y) +1; + if(d == handleGetYearLength(y)){ + m=11; + break; + }else if(d < handleGetYearLength(y) ){ + int monthLen = handleGetMonthLength(y, m); + m=0; + while(d > monthLen){ + d -= monthLen; + m++; + monthLen = handleGetMonthLength(y, m); + } + break; + } + } + year = y; + month = m; + } + } else { // invalid 'civil' + U_ASSERT(false); // should not get here, out of range + year=month=0; + } + + dayOfMonth = (days - monthStart(year, month)) + 1; + + // Now figure out the day of the year. + dayOfYear = (days - monthStart(year, 0) + 1); + + + internalSet(UCAL_ERA, 0); + internalSet(UCAL_YEAR, year); + internalSet(UCAL_EXTENDED_YEAR, year); + internalSet(UCAL_MONTH, month); + internalSet(UCAL_DAY_OF_MONTH, dayOfMonth); + internalSet(UCAL_DAY_OF_YEAR, dayOfYear); +} + +UBool +IslamicCalendar::inDaylightTime(UErrorCode& status) const +{ + // copied from GregorianCalendar + if (U_FAILURE(status) || (&(getTimeZone()) == NULL && !getTimeZone().useDaylightTime())) + return FALSE; + + // Force an update of the state of the Calendar. + ((IslamicCalendar*)this)->complete(status); // cast away const + + return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE); +} + +/** + * The system maintains a static default century start date and Year. They are + * initialized the first time they are used. Once the system default century date + * and year are set, they do not change. + */ +static UDate gSystemDefaultCenturyStart = DBL_MIN; +static int32_t gSystemDefaultCenturyStartYear = -1; +static icu::UInitOnce gSystemDefaultCenturyInit = U_INITONCE_INITIALIZER; + + +UBool IslamicCalendar::haveDefaultCentury() const +{ + return TRUE; +} + +UDate IslamicCalendar::defaultCenturyStart() const +{ + // lazy-evaluate systemDefaultCenturyStart + umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury); + return gSystemDefaultCenturyStart; +} + +int32_t IslamicCalendar::defaultCenturyStartYear() const +{ + // lazy-evaluate systemDefaultCenturyStartYear + umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury); + return gSystemDefaultCenturyStartYear; +} + + +void U_CALLCONV +IslamicCalendar::initializeSystemDefaultCentury() +{ + // initialize systemDefaultCentury and systemDefaultCenturyYear based + // on the current time. They'll be set to 80 years before + // the current time. + UErrorCode status = U_ZERO_ERROR; + IslamicCalendar calendar(Locale("@calendar=islamic-civil"),status); + if (U_SUCCESS(status)) { + calendar.setTime(Calendar::getNow(), status); + calendar.add(UCAL_YEAR, -80, status); + + gSystemDefaultCenturyStart = calendar.getTime(status); + gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status); + } + // We have no recourse upon failure unless we want to propagate the failure + // out. +} + + + +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(IslamicCalendar) + +U_NAMESPACE_END + +#endif +