1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/intl/icu/source/i18n/islamcal.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,678 @@
1.4 +/*
1.5 +******************************************************************************
1.6 +* Copyright (C) 2003-2013, International Business Machines Corporation
1.7 +* and others. All Rights Reserved.
1.8 +******************************************************************************
1.9 +*
1.10 +* File ISLAMCAL.H
1.11 +*
1.12 +* Modification History:
1.13 +*
1.14 +* Date Name Description
1.15 +* 10/14/2003 srl ported from java IslamicCalendar
1.16 +*****************************************************************************
1.17 +*/
1.18 +
1.19 +#include "islamcal.h"
1.20 +
1.21 +#if !UCONFIG_NO_FORMATTING
1.22 +
1.23 +#include "umutex.h"
1.24 +#include <float.h>
1.25 +#include "gregoimp.h" // Math
1.26 +#include "astro.h" // CalendarAstronomer
1.27 +#include "uhash.h"
1.28 +#include "ucln_in.h"
1.29 +#include "uassert.h"
1.30 +
1.31 +static const UDate HIJRA_MILLIS = -42521587200000.0; // 7/16/622 AD 00:00
1.32 +
1.33 +// Debugging
1.34 +#ifdef U_DEBUG_ISLAMCAL
1.35 +# include <stdio.h>
1.36 +# include <stdarg.h>
1.37 +static void debug_islamcal_loc(const char *f, int32_t l)
1.38 +{
1.39 + fprintf(stderr, "%s:%d: ", f, l);
1.40 +}
1.41 +
1.42 +static void debug_islamcal_msg(const char *pat, ...)
1.43 +{
1.44 + va_list ap;
1.45 + va_start(ap, pat);
1.46 + vfprintf(stderr, pat, ap);
1.47 + fflush(stderr);
1.48 +}
1.49 +// must use double parens, i.e.: U_DEBUG_ISLAMCAL_MSG(("four is: %d",4));
1.50 +#define U_DEBUG_ISLAMCAL_MSG(x) {debug_islamcal_loc(__FILE__,__LINE__);debug_islamcal_msg x;}
1.51 +#else
1.52 +#define U_DEBUG_ISLAMCAL_MSG(x)
1.53 +#endif
1.54 +
1.55 +
1.56 +// --- The cache --
1.57 +// cache of months
1.58 +static UMutex astroLock = U_MUTEX_INITIALIZER; // pod bay door lock
1.59 +static icu::CalendarCache *gMonthCache = NULL;
1.60 +static icu::CalendarAstronomer *gIslamicCalendarAstro = NULL;
1.61 +
1.62 +U_CDECL_BEGIN
1.63 +static UBool calendar_islamic_cleanup(void) {
1.64 + if (gMonthCache) {
1.65 + delete gMonthCache;
1.66 + gMonthCache = NULL;
1.67 + }
1.68 + if (gIslamicCalendarAstro) {
1.69 + delete gIslamicCalendarAstro;
1.70 + gIslamicCalendarAstro = NULL;
1.71 + }
1.72 + return TRUE;
1.73 +}
1.74 +U_CDECL_END
1.75 +
1.76 +U_NAMESPACE_BEGIN
1.77 +
1.78 +// Implementation of the IslamicCalendar class
1.79 +
1.80 +/**
1.81 + * Friday EPOC
1.82 + */
1.83 +static const int32_t CIVIL_EPOC = 1948440;
1.84 +
1.85 +/**
1.86 + * Thursday EPOC
1.87 + */
1.88 +static const int32_t ASTRONOMICAL_EPOC = 1948439;
1.89 +
1.90 +
1.91 +static const int32_t UMALQURA_YEAR_START = 1318;
1.92 +static const int32_t UMALQURA_YEAR_END = 1480;
1.93 +
1.94 +static const int UMALQURA_MONTHLENGTH[] = {
1.95 + //* 1318 -1322 */ "0101 0111 0100", "1001 0111 0110", "0100 1011 0111", "0010 0101 0111", "0101 0010 1011",
1.96 + 0x0574, 0x0975, 0x06A7, 0x0257, 0x052B,
1.97 + //* 1323 -1327 */ "0110 1001 0101", "0110 1100 1010", "1010 1101 0101", "0101 0101 1011", "0010 0101 1101",
1.98 + 0x0695, 0x06CA, 0x0AD5, 0x055B, 0x025B,
1.99 + //* 1328 -1332 */ "1001 0010 1101", "1100 1001 0101", "1101 0100 1010", "1110 1010 0101", "0110 1101 0010",
1.100 + 0x092D, 0x0C95, 0x0D4A, 0x0E5B, 0x025B,
1.101 + //* 1333 -1337 */ "1010 1101 0101", "0101 0101 1010", "1010 1010 1011", "0100 0100 1011", "0110 1010 0101",
1.102 + 0x0AD5, 0x055A, 0x0AAB, 0x044B, 0x06A5,
1.103 + //* 1338 -1342 */ "0111 0101 0010", "1011 1010 1001", "0011 0111 0100", "1010 1011 0110", "0101 0101 0110",
1.104 + 0x0752, 0x0BA9, 0x0374, 0x0AB6, 0x0556,
1.105 + //* 1343 -1347 */ "1010 1010 1010", "1101 0101 0010", "1101 1010 1001", "0101 1101 0100", "1010 1110 1010",
1.106 + 0x0AAA, 0x0D52, 0x0DA9, 0x05D4, 0x0AEA,
1.107 + //* 1348 -1352 */ "0100 1101 1101", "0010 0110 1110", "1001 0010 1110", "1010 1010 0110", "1101 0101 0100",
1.108 + 0x04DD, 0x026E, 0x092E, 0x0AA6, 0x0D54,
1.109 + //* 1353 -1357 */ "0101 1010 1010", "0101 1011 0101", "0010 1011 0100", "1001 0011 0111", "0100 1001 1011",
1.110 + 0x05AA, 0x05B5, 0x02B4, 0x0937, 0x049B,
1.111 + //* 1358 -1362 */ "1010 0100 1011", "1011 0010 0101", "1011 0101 0100", "1011 0110 1010", "0101 0110 1101",
1.112 + 0x0A4B, 0x0B25, 0x0B54, 0x0B6A, 0x056D,
1.113 + //* 1363 -1367 */ "0100 1010 1101", "1010 0101 0101", "1101 0010 0101", "1110 1001 0010", "1110 1100 1001",
1.114 + 0x04AD, 0x0A55, 0x0D25, 0x0E92, 0x0EC9,
1.115 + //* 1368 -1372 */ "0110 1101 0100", "1010 1110 1010", "0101 0110 1011", "0100 1010 1011", "0110 1000 0101",
1.116 + 0x06D4, 0x0ADA, 0x056B, 0x04AB, 0x0685,
1.117 + //* 1373 -1377 */ "1011 0100 1001", "1011 1010 0100", "1011 1011 0010", "0101 1011 0101", "0010 1011 1010",
1.118 + 0x0B49, 0x0BA4, 0x0BB2, 0x05B5, 0x02BA,
1.119 + //* 1378 -1382 */ "1001 0101 1011", "0100 1010 1011", "0101 0101 0101", "0110 1011 0010", "0110 1101 1001",
1.120 + 0x095B, 0x04AB, 0x0555, 0x06B2, 0x06D9,
1.121 + //* 1383 -1387 */ "0010 1110 1100", "1001 0110 1110", "0100 1010 1110", "1010 0101 0110", "1101 0010 1010",
1.122 + 0x02EC, 0x096E, 0x04AE, 0x0A56, 0x0D2A,
1.123 + //* 1388 -1392 */ "1101 0101 0101", "0101 1010 1010", "1010 1011 0101", "0100 1011 1011", "0000 0101 1011",
1.124 + 0x0D55, 0x05AA, 0x0AB5, 0x04BB, 0x005B,
1.125 + //* 1393 -1397 */ "1001 0010 1011", "1010 1001 0101", "0011 0100 1010", "1011 1010 0101", "0101 1010 1010",
1.126 + 0x092B, 0x0A95, 0x034A, 0x0BA5, 0x05AA,
1.127 + //* 1398 -1402 */ "1010 1011 0101", "0101 0101 0110", "1010 1001 0110", "1101 0100 1010", "1110 1010 0101",
1.128 + 0x0AB5, 0x0556, 0x0A96, 0x0B4A, 0x0EA5,
1.129 + //* 1403 -1407 */ "0111 0101 0010", "0110 1110 1001", "0011 0110 1010", "1010 1010 1101", "0101 0101 0101",
1.130 + 0x0752, 0x06E9, 0x036A, 0x0AAD, 0x0555,
1.131 + //* 1408 -1412 */ "1010 1010 0101", "1011 0101 0010", "1011 1010 1001", "0101 1011 0100", "1001 1011 1010",
1.132 + 0x0AA5, 0x0B52, 0x0BA9, 0x05B4, 0x09BA,
1.133 + //* 1413 -1417 */ "0100 1101 1011", "0010 0101 1101", "0101 0010 1101", "1010 1010 0101", "1010 1101 0100",
1.134 + 0x04DB, 0x025D, 0x052D, 0x0AA5, 0x0AD4,
1.135 + //* 1418 -1422 */ "1010 1110 1010", "0101 0110 1101", "0100 1011 1101", "0010 0011 1101", "1001 0001 1101",
1.136 + 0x0AEA, 0x056D, 0x04BD, 0x023D, 0x091D,
1.137 + //* 1423 -1427 */ "1010 1001 0101", "1011 0100 1010", "1011 0101 1010", "0101 0110 1101", "0010 1011 0110",
1.138 + 0x0A95, 0x0B4A, 0x0B5A, 0x056D, 0x02B6,
1.139 + //* 1428 -1432 */ "1001 0011 1011", "0100 1001 1011", "0110 0101 0101", "0110 1010 1001", "0111 0101 0100",
1.140 + 0x093B, 0x049B, 0x0655, 0x06A9, 0x0754,
1.141 + //* 1433 -1437 */ "1011 0110 1010", "0101 0110 1100", "1010 1010 1101", "0101 0101 0101", "1011 0010 1001",
1.142 + 0x0B6A, 0x056C, 0x0AAD, 0x0555, 0x0B29,
1.143 + //* 1438 -1442 */ "1011 1001 0010", "1011 1010 1001", "0101 1101 0100", "1010 1101 1010", "0101 0101 1010",
1.144 + 0x0B92, 0x0BA9, 0x05D4, 0x0ADA, 0x055A,
1.145 + //* 1443 -1447 */ "1010 1010 1011", "0101 1001 0101", "0111 0100 1001", "0111 0110 0100", "1011 1010 1010",
1.146 + 0x0AAB, 0x0595, 0x0749, 0x0764, 0x0BAA,
1.147 + //* 1448 -1452 */ "0101 1011 0101", "0010 1011 0110", "1010 0101 0110", "1110 0100 1101", "1011 0010 0101",
1.148 + 0x05B5, 0x02B6, 0x0A56, 0x0E4D, 0x0B25,
1.149 + //* 1453 -1457 */ "1011 0101 0010", "1011 0110 1010", "0101 1010 1101", "0010 1010 1110", "1001 0010 1111",
1.150 + 0x0B52, 0x0B6A, 0x05AD, 0x02AE, 0x092F,
1.151 + //* 1458 -1462 */ "0100 1001 0111", "0110 0100 1011", "0110 1010 0101", "0110 1010 1100", "1010 1101 0110",
1.152 + 0x0497, 0x064B, 0x06A5, 0x06AC, 0x0AD6,
1.153 + //* 1463 -1467 */ "0101 0101 1101", "0100 1001 1101", "1010 0100 1101", "1101 0001 0110", "1101 1001 0101",
1.154 + 0x055D, 0x049D, 0x0A4D, 0x0D16, 0x0D95,
1.155 + //* 1468 -1472 */ "0101 1010 1010", "0101 1011 0101", "0010 1001 1010", "1001 0101 1011", "0100 1010 1100",
1.156 + 0x05AA, 0x05B5, 0x029A, 0x095B, 0x04AC,
1.157 + //* 1473 -1477 */ "0101 1001 0101", "0110 1100 1010", "0110 1110 0100", "1010 1110 1010", "0100 1111 0101",
1.158 + 0x0595, 0x06CA, 0x06E4, 0x0AEA, 0x04F5,
1.159 + //* 1478 -1480 */ "0010 1011 0110", "1001 0101 0110", "1010 1010 1010"
1.160 + 0x02B6, 0x0956, 0x0AAA
1.161 +};
1.162 +
1.163 +int32_t getUmalqura_MonthLength(int32_t y, int32_t m) {
1.164 + int32_t mask = (int32_t) (0x01 << (11 - m)); // set mask for bit corresponding to month
1.165 + if((UMALQURA_MONTHLENGTH[y] & mask) == 0 )
1.166 + return 29;
1.167 + else
1.168 + return 30;
1.169 +
1.170 +}
1.171 +
1.172 +//-------------------------------------------------------------------------
1.173 +// Constructors...
1.174 +//-------------------------------------------------------------------------
1.175 +
1.176 +const char *IslamicCalendar::getType() const {
1.177 + const char *sType = NULL;
1.178 +
1.179 + switch (cType) {
1.180 + case CIVIL:
1.181 + sType = "islamic-civil";
1.182 + break;
1.183 + case ASTRONOMICAL:
1.184 + sType = "islamic";
1.185 + break;
1.186 + case TBLA:
1.187 + sType = "islamic-tbla";
1.188 + break;
1.189 + case UMALQURA:
1.190 + sType = "islamic-umalqura";
1.191 + break;
1.192 + default:
1.193 + U_ASSERT(false); // out of range
1.194 + sType = "islamic"; // "islamic" is used as the generic type
1.195 + break;
1.196 + }
1.197 + return sType;
1.198 +}
1.199 +
1.200 +Calendar* IslamicCalendar::clone() const {
1.201 + return new IslamicCalendar(*this);
1.202 +}
1.203 +
1.204 +IslamicCalendar::IslamicCalendar(const Locale& aLocale, UErrorCode& success, ECalculationType type)
1.205 +: Calendar(TimeZone::createDefault(), aLocale, success),
1.206 +cType(type)
1.207 +{
1.208 + setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
1.209 +}
1.210 +
1.211 +IslamicCalendar::IslamicCalendar(const IslamicCalendar& other) : Calendar(other), cType(other.cType) {
1.212 +}
1.213 +
1.214 +IslamicCalendar::~IslamicCalendar()
1.215 +{
1.216 +}
1.217 +
1.218 +void IslamicCalendar::setCalculationType(ECalculationType type, UErrorCode &status)
1.219 +{
1.220 + if (cType != type) {
1.221 + // The fields of the calendar will become invalid, because the calendar
1.222 + // rules are different
1.223 + UDate m = getTimeInMillis(status);
1.224 + cType = type;
1.225 + clear();
1.226 + setTimeInMillis(m, status);
1.227 + }
1.228 +}
1.229 +
1.230 +/**
1.231 +* Returns <code>true</code> if this object is using the fixed-cycle civil
1.232 +* calendar, or <code>false</code> if using the religious, astronomical
1.233 +* calendar.
1.234 +* @draft ICU 2.4
1.235 +*/
1.236 +UBool IslamicCalendar::isCivil() {
1.237 + return (cType == CIVIL);
1.238 +}
1.239 +
1.240 +//-------------------------------------------------------------------------
1.241 +// Minimum / Maximum access functions
1.242 +//-------------------------------------------------------------------------
1.243 +
1.244 +// Note: Current IslamicCalendar implementation does not work
1.245 +// well with negative years.
1.246 +
1.247 +// TODO: In some cases the current ICU Islamic calendar implementation shows
1.248 +// a month as having 31 days. Since date parsing now uses range checks based
1.249 +// on the table below, we need to change the range for last day of month to
1.250 +// include 31 as a workaround until the implementation is fixed.
1.251 +static const int32_t LIMITS[UCAL_FIELD_COUNT][4] = {
1.252 + // Minimum Greatest Least Maximum
1.253 + // Minimum Maximum
1.254 + { 0, 0, 0, 0}, // ERA
1.255 + { 1, 1, 5000000, 5000000}, // YEAR
1.256 + { 0, 0, 11, 11}, // MONTH
1.257 + { 1, 1, 50, 51}, // WEEK_OF_YEAR
1.258 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH
1.259 + { 1, 1, 29, 31}, // DAY_OF_MONTH - 31 to workaround for cal implementation bug, should be 30
1.260 + { 1, 1, 354, 355}, // DAY_OF_YEAR
1.261 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK
1.262 + { -1, -1, 5, 5}, // DAY_OF_WEEK_IN_MONTH
1.263 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM
1.264 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR
1.265 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY
1.266 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE
1.267 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND
1.268 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND
1.269 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET
1.270 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET
1.271 + { 1, 1, 5000000, 5000000}, // YEAR_WOY
1.272 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL
1.273 + { 1, 1, 5000000, 5000000}, // EXTENDED_YEAR
1.274 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY
1.275 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECONDS_IN_DAY
1.276 + {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // IS_LEAP_MONTH
1.277 +};
1.278 +
1.279 +/**
1.280 +* @draft ICU 2.4
1.281 +*/
1.282 +int32_t IslamicCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const {
1.283 + return LIMITS[field][limitType];
1.284 +}
1.285 +
1.286 +//-------------------------------------------------------------------------
1.287 +// Assorted calculation utilities
1.288 +//
1.289 +
1.290 +/**
1.291 +* Determine whether a year is a leap year in the Islamic civil calendar
1.292 +*/
1.293 +UBool IslamicCalendar::civilLeapYear(int32_t year)
1.294 +{
1.295 + return (14 + 11 * year) % 30 < 11;
1.296 +}
1.297 +
1.298 +/**
1.299 +* Return the day # on which the given year starts. Days are counted
1.300 +* from the Hijri epoch, origin 0.
1.301 +*/
1.302 +int32_t IslamicCalendar::yearStart(int32_t year) const{
1.303 + if (cType == CIVIL || cType == TBLA ||
1.304 + (cType == UMALQURA && year < UMALQURA_YEAR_START))
1.305 + {
1.306 + return (year-1)*354 + ClockMath::floorDivide((3+11*year),30);
1.307 + } else if(cType==ASTRONOMICAL){
1.308 + return trueMonthStart(12*(year-1));
1.309 + } else {
1.310 + int32_t ys = yearStart(UMALQURA_YEAR_START-1);
1.311 + ys+= handleGetYearLength(UMALQURA_YEAR_START-1);
1.312 + for(int i=UMALQURA_YEAR_START; i< year; i++){
1.313 + ys+= handleGetYearLength(i);
1.314 + }
1.315 + return ys;
1.316 + }
1.317 +}
1.318 +
1.319 +/**
1.320 +* Return the day # on which the given month starts. Days are counted
1.321 +* from the Hijri epoch, origin 0.
1.322 +*
1.323 +* @param year The hijri year
1.324 +* @param year The hijri month, 0-based
1.325 +*/
1.326 +int32_t IslamicCalendar::monthStart(int32_t year, int32_t month) const {
1.327 + if (cType == CIVIL || cType == TBLA) {
1.328 + return (int32_t)uprv_ceil(29.5*month)
1.329 + + (year-1)*354 + (int32_t)ClockMath::floorDivide((3+11*year),30);
1.330 + } else if(cType==ASTRONOMICAL){
1.331 + return trueMonthStart(12*(year-1) + month);
1.332 + } else {
1.333 + int32_t ms = yearStart(year);
1.334 + for(int i=0; i< month; i++){
1.335 + ms+= handleGetMonthLength(year, i);
1.336 + }
1.337 + return ms;
1.338 + }
1.339 +}
1.340 +
1.341 +/**
1.342 +* Find the day number on which a particular month of the true/lunar
1.343 +* Islamic calendar starts.
1.344 +*
1.345 +* @param month The month in question, origin 0 from the Hijri epoch
1.346 +*
1.347 +* @return The day number on which the given month starts.
1.348 +*/
1.349 +int32_t IslamicCalendar::trueMonthStart(int32_t month) const
1.350 +{
1.351 + UErrorCode status = U_ZERO_ERROR;
1.352 + int32_t start = CalendarCache::get(&gMonthCache, month, status);
1.353 +
1.354 + if (start==0) {
1.355 + // Make a guess at when the month started, using the average length
1.356 + UDate origin = HIJRA_MILLIS
1.357 + + uprv_floor(month * CalendarAstronomer::SYNODIC_MONTH) * kOneDay;
1.358 +
1.359 + // moonAge will fail due to memory allocation error
1.360 + double age = moonAge(origin, status);
1.361 + if (U_FAILURE(status)) {
1.362 + goto trueMonthStartEnd;
1.363 + }
1.364 +
1.365 + if (age >= 0) {
1.366 + // The month has already started
1.367 + do {
1.368 + origin -= kOneDay;
1.369 + age = moonAge(origin, status);
1.370 + if (U_FAILURE(status)) {
1.371 + goto trueMonthStartEnd;
1.372 + }
1.373 + } while (age >= 0);
1.374 + }
1.375 + else {
1.376 + // Preceding month has not ended yet.
1.377 + do {
1.378 + origin += kOneDay;
1.379 + age = moonAge(origin, status);
1.380 + if (U_FAILURE(status)) {
1.381 + goto trueMonthStartEnd;
1.382 + }
1.383 + } while (age < 0);
1.384 + }
1.385 + start = (int32_t)ClockMath::floorDivide((origin - HIJRA_MILLIS), (double)kOneDay) + 1;
1.386 + CalendarCache::put(&gMonthCache, month, start, status);
1.387 + }
1.388 +trueMonthStartEnd :
1.389 + if(U_FAILURE(status)) {
1.390 + start = 0;
1.391 + }
1.392 + return start;
1.393 +}
1.394 +
1.395 +/**
1.396 +* Return the "age" of the moon at the given time; this is the difference
1.397 +* in ecliptic latitude between the moon and the sun. This method simply
1.398 +* calls CalendarAstronomer.moonAge, converts to degrees,
1.399 +* and adjusts the result to be in the range [-180, 180].
1.400 +*
1.401 +* @param time The time at which the moon's age is desired,
1.402 +* in millis since 1/1/1970.
1.403 +*/
1.404 +double IslamicCalendar::moonAge(UDate time, UErrorCode &status)
1.405 +{
1.406 + double age = 0;
1.407 +
1.408 + umtx_lock(&astroLock);
1.409 + if(gIslamicCalendarAstro == NULL) {
1.410 + gIslamicCalendarAstro = new CalendarAstronomer();
1.411 + if (gIslamicCalendarAstro == NULL) {
1.412 + status = U_MEMORY_ALLOCATION_ERROR;
1.413 + return age;
1.414 + }
1.415 + ucln_i18n_registerCleanup(UCLN_I18N_ISLAMIC_CALENDAR, calendar_islamic_cleanup);
1.416 + }
1.417 + gIslamicCalendarAstro->setTime(time);
1.418 + age = gIslamicCalendarAstro->getMoonAge();
1.419 + umtx_unlock(&astroLock);
1.420 +
1.421 + // Convert to degrees and normalize...
1.422 + age = age * 180 / CalendarAstronomer::PI;
1.423 + if (age > 180) {
1.424 + age = age - 360;
1.425 + }
1.426 +
1.427 + return age;
1.428 +}
1.429 +
1.430 +//----------------------------------------------------------------------
1.431 +// Calendar framework
1.432 +//----------------------------------------------------------------------
1.433 +
1.434 +/**
1.435 +* Return the length (in days) of the given month.
1.436 +*
1.437 +* @param year The hijri year
1.438 +* @param year The hijri month, 0-based
1.439 +* @draft ICU 2.4
1.440 +*/
1.441 +int32_t IslamicCalendar::handleGetMonthLength(int32_t extendedYear, int32_t month) const {
1.442 +
1.443 + int32_t length = 0;
1.444 +
1.445 + if (cType == CIVIL || cType == TBLA ||
1.446 + (cType == UMALQURA && (extendedYear<UMALQURA_YEAR_START || extendedYear>UMALQURA_YEAR_END)) ) {
1.447 + length = 29 + (month+1) % 2;
1.448 + if (month == DHU_AL_HIJJAH && civilLeapYear(extendedYear)) {
1.449 + length++;
1.450 + }
1.451 + } else if(cType == ASTRONOMICAL){
1.452 + month = 12*(extendedYear-1) + month;
1.453 + length = trueMonthStart(month+1) - trueMonthStart(month) ;
1.454 + } else {
1.455 + length = getUmalqura_MonthLength(extendedYear - UMALQURA_YEAR_START, month);
1.456 + }
1.457 + return length;
1.458 +}
1.459 +
1.460 +/**
1.461 +* Return the number of days in the given Islamic year
1.462 +* @draft ICU 2.4
1.463 +*/
1.464 +int32_t IslamicCalendar::handleGetYearLength(int32_t extendedYear) const {
1.465 + if (cType == CIVIL || cType == TBLA ||
1.466 + (cType == UMALQURA && (extendedYear<UMALQURA_YEAR_START || extendedYear>UMALQURA_YEAR_END)) ) {
1.467 + return 354 + (civilLeapYear(extendedYear) ? 1 : 0);
1.468 + } else if(cType == ASTRONOMICAL){
1.469 + int32_t month = 12*(extendedYear-1);
1.470 + return (trueMonthStart(month + 12) - trueMonthStart(month));
1.471 + } else {
1.472 + int len = 0;
1.473 + for(int i=0; i<12; i++)
1.474 + len += handleGetMonthLength(extendedYear, i);
1.475 + return len;
1.476 + }
1.477 +}
1.478 +
1.479 +//-------------------------------------------------------------------------
1.480 +// Functions for converting from field values to milliseconds....
1.481 +//-------------------------------------------------------------------------
1.482 +
1.483 +// Return JD of start of given month/year
1.484 +/**
1.485 +* @draft ICU 2.4
1.486 +*/
1.487 +int32_t IslamicCalendar::handleComputeMonthStart(int32_t eyear, int32_t month, UBool /* useMonth */) const {
1.488 + return monthStart(eyear, month) + 1948439;
1.489 +}
1.490 +
1.491 +//-------------------------------------------------------------------------
1.492 +// Functions for converting from milliseconds to field values
1.493 +//-------------------------------------------------------------------------
1.494 +
1.495 +/**
1.496 +* @draft ICU 2.4
1.497 +*/
1.498 +int32_t IslamicCalendar::handleGetExtendedYear() {
1.499 + int32_t year;
1.500 + if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
1.501 + year = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1
1.502 + } else {
1.503 + year = internalGet(UCAL_YEAR, 1); // Default to year 1
1.504 + }
1.505 + return year;
1.506 +}
1.507 +
1.508 +/**
1.509 +* Override Calendar to compute several fields specific to the Islamic
1.510 +* calendar system. These are:
1.511 +*
1.512 +* <ul><li>ERA
1.513 +* <li>YEAR
1.514 +* <li>MONTH
1.515 +* <li>DAY_OF_MONTH
1.516 +* <li>DAY_OF_YEAR
1.517 +* <li>EXTENDED_YEAR</ul>
1.518 +*
1.519 +* The DAY_OF_WEEK and DOW_LOCAL fields are already set when this
1.520 +* method is called. The getGregorianXxx() methods return Gregorian
1.521 +* calendar equivalents for the given Julian day.
1.522 +* @draft ICU 2.4
1.523 +*/
1.524 +void IslamicCalendar::handleComputeFields(int32_t julianDay, UErrorCode &status) {
1.525 + int32_t year, month, dayOfMonth, dayOfYear;
1.526 + UDate startDate;
1.527 + int32_t days = julianDay - CIVIL_EPOC;
1.528 +
1.529 + if (cType == CIVIL || cType == TBLA) {
1.530 + if(cType == TBLA)
1.531 + days = julianDay - ASTRONOMICAL_EPOC;
1.532 + // Use the civil calendar approximation, which is just arithmetic
1.533 + year = (int)ClockMath::floorDivide( (double)(30 * days + 10646) , 10631.0 );
1.534 + month = (int32_t)uprv_ceil((days - 29 - yearStart(year)) / 29.5 );
1.535 + month = month<11?month:11;
1.536 + startDate = monthStart(year, month);
1.537 + } else if(cType == ASTRONOMICAL){
1.538 + // Guess at the number of elapsed full months since the epoch
1.539 + int32_t months = (int32_t)uprv_floor((double)days / CalendarAstronomer::SYNODIC_MONTH);
1.540 +
1.541 + startDate = uprv_floor(months * CalendarAstronomer::SYNODIC_MONTH);
1.542 +
1.543 + double age = moonAge(internalGetTime(), status);
1.544 + if (U_FAILURE(status)) {
1.545 + status = U_MEMORY_ALLOCATION_ERROR;
1.546 + return;
1.547 + }
1.548 + if ( days - startDate >= 25 && age > 0) {
1.549 + // If we're near the end of the month, assume next month and search backwards
1.550 + months++;
1.551 + }
1.552 +
1.553 + // Find out the last time that the new moon was actually visible at this longitude
1.554 + // This returns midnight the night that the moon was visible at sunset.
1.555 + while ((startDate = trueMonthStart(months)) > days) {
1.556 + // If it was after the date in question, back up a month and try again
1.557 + months--;
1.558 + }
1.559 +
1.560 + year = months / 12 + 1;
1.561 + month = months % 12;
1.562 + } else if(cType == UMALQURA) {
1.563 + int32_t umalquraStartdays = yearStart(UMALQURA_YEAR_START) ;
1.564 + if( days < umalquraStartdays){
1.565 + //Use Civil calculation
1.566 + year = (int)ClockMath::floorDivide( (double)(30 * days + 10646) , 10631.0 );
1.567 + month = (int32_t)uprv_ceil((days - 29 - yearStart(year)) / 29.5 );
1.568 + month = month<11?month:11;
1.569 + startDate = monthStart(year, month);
1.570 + }else{
1.571 + int y =UMALQURA_YEAR_START-1, m =0;
1.572 + long d = 1;
1.573 + while(d > 0){
1.574 + y++;
1.575 + d = days - yearStart(y) +1;
1.576 + if(d == handleGetYearLength(y)){
1.577 + m=11;
1.578 + break;
1.579 + }else if(d < handleGetYearLength(y) ){
1.580 + int monthLen = handleGetMonthLength(y, m);
1.581 + m=0;
1.582 + while(d > monthLen){
1.583 + d -= monthLen;
1.584 + m++;
1.585 + monthLen = handleGetMonthLength(y, m);
1.586 + }
1.587 + break;
1.588 + }
1.589 + }
1.590 + year = y;
1.591 + month = m;
1.592 + }
1.593 + } else { // invalid 'civil'
1.594 + U_ASSERT(false); // should not get here, out of range
1.595 + year=month=0;
1.596 + }
1.597 +
1.598 + dayOfMonth = (days - monthStart(year, month)) + 1;
1.599 +
1.600 + // Now figure out the day of the year.
1.601 + dayOfYear = (days - monthStart(year, 0) + 1);
1.602 +
1.603 +
1.604 + internalSet(UCAL_ERA, 0);
1.605 + internalSet(UCAL_YEAR, year);
1.606 + internalSet(UCAL_EXTENDED_YEAR, year);
1.607 + internalSet(UCAL_MONTH, month);
1.608 + internalSet(UCAL_DAY_OF_MONTH, dayOfMonth);
1.609 + internalSet(UCAL_DAY_OF_YEAR, dayOfYear);
1.610 +}
1.611 +
1.612 +UBool
1.613 +IslamicCalendar::inDaylightTime(UErrorCode& status) const
1.614 +{
1.615 + // copied from GregorianCalendar
1.616 + if (U_FAILURE(status) || (&(getTimeZone()) == NULL && !getTimeZone().useDaylightTime()))
1.617 + return FALSE;
1.618 +
1.619 + // Force an update of the state of the Calendar.
1.620 + ((IslamicCalendar*)this)->complete(status); // cast away const
1.621 +
1.622 + return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE);
1.623 +}
1.624 +
1.625 +/**
1.626 + * The system maintains a static default century start date and Year. They are
1.627 + * initialized the first time they are used. Once the system default century date
1.628 + * and year are set, they do not change.
1.629 + */
1.630 +static UDate gSystemDefaultCenturyStart = DBL_MIN;
1.631 +static int32_t gSystemDefaultCenturyStartYear = -1;
1.632 +static icu::UInitOnce gSystemDefaultCenturyInit = U_INITONCE_INITIALIZER;
1.633 +
1.634 +
1.635 +UBool IslamicCalendar::haveDefaultCentury() const
1.636 +{
1.637 + return TRUE;
1.638 +}
1.639 +
1.640 +UDate IslamicCalendar::defaultCenturyStart() const
1.641 +{
1.642 + // lazy-evaluate systemDefaultCenturyStart
1.643 + umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
1.644 + return gSystemDefaultCenturyStart;
1.645 +}
1.646 +
1.647 +int32_t IslamicCalendar::defaultCenturyStartYear() const
1.648 +{
1.649 + // lazy-evaluate systemDefaultCenturyStartYear
1.650 + umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
1.651 + return gSystemDefaultCenturyStartYear;
1.652 +}
1.653 +
1.654 +
1.655 +void U_CALLCONV
1.656 +IslamicCalendar::initializeSystemDefaultCentury()
1.657 +{
1.658 + // initialize systemDefaultCentury and systemDefaultCenturyYear based
1.659 + // on the current time. They'll be set to 80 years before
1.660 + // the current time.
1.661 + UErrorCode status = U_ZERO_ERROR;
1.662 + IslamicCalendar calendar(Locale("@calendar=islamic-civil"),status);
1.663 + if (U_SUCCESS(status)) {
1.664 + calendar.setTime(Calendar::getNow(), status);
1.665 + calendar.add(UCAL_YEAR, -80, status);
1.666 +
1.667 + gSystemDefaultCenturyStart = calendar.getTime(status);
1.668 + gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status);
1.669 + }
1.670 + // We have no recourse upon failure unless we want to propagate the failure
1.671 + // out.
1.672 +}
1.673 +
1.674 +
1.675 +
1.676 +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(IslamicCalendar)
1.677 +
1.678 +U_NAMESPACE_END
1.679 +
1.680 +#endif
1.681 +
