projects / apple / icu.git / blame
| Commit | Line | Data |
|---|---|---|
| 374ca955 | 1 | /* |
| 46f4442e | 2 | ****************************************************************************** |
| 57a6839d | 3 | * Copyright (C) 2003-2013, International Business Machines Corporation |
| 46f4442e A |
4 | * and others. All Rights Reserved. |
| 5 | ****************************************************************************** | |
| 6 | * | |
| 7 | * File ISLAMCAL.H | |
| 8 | * | |
| 9 | * Modification History: | |
| 10 | * | |
| 11 | * Date Name Description | |
| 12 | * 10/14/2003 srl ported from java IslamicCalendar | |
| 13 | ***************************************************************************** | |
| 14 | */ | |
| 374ca955 A |
15 | |
| 16 | #include "islamcal.h" | |
| 17 | ||
| 18 | #if !UCONFIG_NO_FORMATTING | |
| 19 | ||
| 46f4442e | 20 | #include "umutex.h" |
| 374ca955 A |
21 | #include <float.h> |
| 22 | #include "gregoimp.h" // Math | |
| 23 | #include "astro.h" // CalendarAstronomer | |
| 24 | #include "uhash.h" | |
| 25 | #include "ucln_in.h" | |
| 57a6839d | 26 | #include "uassert.h" |
| 374ca955 A |
27 | |
| 28 | static const UDate HIJRA_MILLIS = -42521587200000.0; // 7/16/622 AD 00:00 | |
| 29 | ||
| 30 | // Debugging | |
| 31 | #ifdef U_DEBUG_ISLAMCAL | |
| 32 | # include <stdio.h> | |
| 33 | # include <stdarg.h> | |
| 34 | static void debug_islamcal_loc(const char *f, int32_t l) | |
| 35 | { | |
| 46f4442e | 36 | fprintf(stderr, "%s:%d: ", f, l); |
| 374ca955 A |
37 | } |
| 38 | ||
| 39 | static void debug_islamcal_msg(const char *pat, ...) | |
| 40 | { | |
| 46f4442e A |
41 | va_list ap; |
| 42 | va_start(ap, pat); | |
| 43 | vfprintf(stderr, pat, ap); | |
| 44 | fflush(stderr); | |
| 374ca955 A |
45 | } |
| 46 | // must use double parens, i.e.: U_DEBUG_ISLAMCAL_MSG(("four is: %d",4)); | |
| 47 | #define U_DEBUG_ISLAMCAL_MSG(x) {debug_islamcal_loc(__FILE__,__LINE__);debug_islamcal_msg x;} | |
| 48 | #else | |
| 49 | #define U_DEBUG_ISLAMCAL_MSG(x) | |
| 50 | #endif | |
| 51 | ||
| 52 | ||
| 53 | // --- The cache -- | |
| 54 | // cache of months | |
| 51004dcb | 55 | static UMutex astroLock = U_MUTEX_INITIALIZER; // pod bay door lock |
| 4388f060 A |
56 | static icu::CalendarCache *gMonthCache = NULL; |
| 57 | static icu::CalendarAstronomer *gIslamicCalendarAstro = NULL; | |
| 374ca955 A |
58 | |
| 59 | U_CDECL_BEGIN | |
| 60 | static UBool calendar_islamic_cleanup(void) { | |
| 61 | if (gMonthCache) { | |
| 62 | delete gMonthCache; | |
| 63 | gMonthCache = NULL; | |
| 64 | } | |
| 65 | if (gIslamicCalendarAstro) { | |
| 66 | delete gIslamicCalendarAstro; | |
| 67 | gIslamicCalendarAstro = NULL; | |
| 68 | } | |
| 374ca955 A |
69 | return TRUE; |
| 70 | } | |
| 71 | U_CDECL_END | |
| 72 | ||
| 73 | U_NAMESPACE_BEGIN | |
| 74 | ||
| 75 | // Implementation of the IslamicCalendar class | |
| 76 | ||
| 57a6839d A |
77 | /** |
| 78 | * Friday EPOC | |
| 79 | */ | |
| 80 | static const int32_t CIVIL_EPOC = 1948440; // CE 622 July 16 Friday (Julian calendar) / CE 622 July 19 (Gregorian calendar) | |
| 81 | ||
| 82 | /** | |
| 83 | * Thursday EPOC | |
| 84 | */ | |
| 85 | static const int32_t ASTRONOMICAL_EPOC = 1948439; // CE 622 July 15 Thursday (Julian calendar) | |
| 86 | ||
| 87 | ||
| 88 | static const int32_t UMALQURA_YEAR_START = 1318; | |
| 89 | static const int32_t UMALQURA_YEAR_END = 1480; | |
| 90 | ||
| 91 | static const int UMALQURA_MONTHLENGTH[] = { | |
| 92 | //* 1318 -1322 */ "1011 0110 1010", "1001 0111 0101", "0100 1010 1110", "1010 0100 1111", "0101 0010 1011", | |
| 93 | 0x0B6A, 0x0975, 0x04AE, 0x0A4F, 0x052B, | |
| 94 | //* 1323 -1327 */ "0110 1001 0101", "0110 1100 1010", "1010 1101 0101", "0010 1101 0110", "1001 0101 1011", | |
| 95 | 0x0695, 0x06CA, 0x0AD5, 0x02D6, 0x095B, | |
| 96 | //* 1328 -1332 */ "1001 0010 1101", "1100 1001 0101", "1101 0100 1010", "1101 1001 0101", "0110 1101 0010", | |
| 97 | 0x092D, 0x0C95, 0x0D4A, 0x0D95, 0x025B, | |
| 98 | //* 1333 -1337 */ "1010 1101 0101", "0101 0101 1010", "1010 1010 1011", "0101 0010 1011", "0110 1010 0101", | |
| 99 | 0x0AD5, 0x055A, 0x0AAB, 0x052B, 0x06A5, | |
| 100 | //* 1338 -1342 */ "0111 0101 0010", "1011 1010 1001", "0011 0111 0100", "1010 1011 0110", "0101 0101 0110", | |
| 101 | 0x0752, 0x0BA9, 0x0374, 0x0AB6, 0x0556, | |
| 102 | //* 1343 -1347 */ "1010 1010 1010", "1101 0101 0010", "1011 1010 0100", "1011 1101 0010", "1010 1110 1010", | |
| 103 | 0x0AAA, 0x0D52, 0x0BA4, 0x0BD2, 0x0AEA, | |
| 104 | //* 1348 -1352 */ "0010 1101 1100", "1001 0110 1101", "1001 0010 1110", "1010 1010 0110", "1101 0101 0100", | |
| 105 | 0x02DC, 0x096D, 0x092E, 0x0AA6, 0x0D54, | |
| 106 | //* 1353 -1357 */ "1011 1010 0101", "0101 1011 0100", "1001 1011 0110", "1001 0011 0111", "0100 1001 1011", | |
| 107 | 0x0BA5, 0x05B4, 0x09B6, 0x0937, 0x049B, | |
| 108 | //* 1358 -1362 */ "1010 0100 1011", "1011 0010 0101", "1011 0101 0100", "1011 0110 1010", "0101 0110 1010", | |
| 109 | 0x0A4B, 0x0B25, 0x0B54, 0x0B6A, 0x056A, | |
| 110 | //* 1363 -1367 */ "1010 1010 1011", "1010 0101 0101", "1101 0010 0101", "1110 1001 0010", "1110 1100 1001", | |
| 111 | 0x0AAB, 0x0A55, 0x0D25, 0x0E92, 0x0EC9, | |
| 112 | //* 1368 -1372 */ "0110 1101 0100", "1010 1110 1010", "0101 0110 1011", "0100 1010 1011", "1001 0100 1011", | |
| 113 | 0x06D4, 0x0ADA, 0x056B, 0x04AB, 0x094B, | |
| 114 | //* 1373 -1377 */ "1011 0100 1001", "1011 1010 0100", "1011 1011 0010", "0101 1011 0101", "0010 1011 1010", | |
| 115 | 0x0B49, 0x0BA4, 0x0BB2, 0x05B5, 0x02BA, | |
| 116 | //* 1378 -1382 */ "1001 0101 1011", "0100 1010 1011", "0101 0101 0101", "0110 1011 0010", "0101 1011 0100", | |
| 117 | 0x095B, 0x04AB, 0x0555, 0x06B2, 0x05B4, | |
| 118 | //* 1383 -1387 */ "1001 1101 1010", "1001 0110 1110", "0100 1010 1110", "1010 0101 0110", "1101 0010 1010", | |
| 119 | 0x09DA, 0x096E, 0x04AE, 0x0A56, 0x0D2A, | |
| 120 | //* 1388 -1392 */ "1101 0101 0100", "1101 1011 0010", "1010 1011 0101", "0010 1101 1010", "1001 0101 1011", | |
| 121 | 0x0D54, 0x0DB2, 0x0AB5, 0x02DA, 0x095B, | |
| 122 | //* 1393 -1397 */ "1001 0010 1011", "1010 1001 0101", "1011 0100 1001", "1011 0110 0100", "1011 0111 0001", | |
| 123 | 0x092B, 0x0A95, 0x0B49, 0x0B64, 0x0B71, | |
| 124 | //* 1398 -1402 */ "0101 1011 0100", "1010 1011 0101", "1010 1001 0110", "1101 0100 1010", "1110 1001 0010", | |
| 125 | 0x05B4, 0x0AB5, 0x0A96, 0x0B4A, 0x0E92, | |
| 126 | //* 1403 -1407 */ "1110 1100 1001", "0110 1101 0100", "1010 1110 1001", "1010 1010 1101", "0101 0101 0101", | |
| 127 | 0x0EC9, 0x06D4, 0x0AE9, 0x0AAD, 0x0555, | |
| 128 | //* 1408 -1412 */ "1010 1010 0101", "1011 0101 0010", "1101 1010 0100", "1101 1011 0010", "1001 1011 1010", | |
| 129 | 0x0AA5, 0x0B52, 0x0DA4, 0x0DB2, 0x09BA, | |
| 130 | //* 1413 -1417 */ "0100 1011 1010", "1010 0101 1011", "0101 0010 1101", "1010 1010 0101", "1010 1101 0100", | |
| 131 | 0x04BA, 0x0A5B, 0x052D, 0x0AA5, 0x0AD4, | |
| 132 | //* 1418 -1422 */ "1010 1110 1010", "0101 0101 1100", "0100 1011 1101", "0010 0011 1101", "1001 0001 1101", | |
| 133 | 0x0AEA, 0x055C, 0x04BD, 0x023D, 0x091D, | |
| 134 | //* 1423 -1427 */ "1010 1001 0101", "1011 0100 1010", "1011 0101 1010", "0101 0110 1101", "0010 1011 0110", | |
| 135 | 0x0A95, 0x0B4A, 0x0B5A, 0x056D, 0x02B6, | |
| 136 | //* 1428 -1432 */ "1001 0011 1011", "0100 1001 1011", "0110 0101 0101", "0110 1010 1001", "0111 0101 0100", | |
| 137 | 0x093B, 0x049B, 0x0655, 0x06A9, 0x0754, | |
| 138 | //* 1433 -1437 */ "1011 0110 1010", "0101 0110 1100", "1010 1010 1101", "0101 0101 0101", "1011 0010 1001", | |
| 139 | 0x0B6A, 0x056C, 0x0AAD, 0x0555, 0x0B29, | |
| 140 | //* 1438 -1442 */ "1011 1001 0010", "1011 1010 1001", "0101 1101 0100", "1010 1101 1010", "0101 0101 1010", | |
| 141 | 0x0B92, 0x0BA9, 0x05D4, 0x0ADA, 0x055A, | |
| 142 | //* 1443 -1447 */ "1010 1010 1011", "0101 1001 0101", "0111 0100 1001", "0111 0110 0100", "1011 1010 1010", | |
| 143 | 0x0AAB, 0x0595, 0x0749, 0x0764, 0x0BAA, | |
| 144 | //* 1448 -1452 */ "0101 1011 0101", "0010 1011 0110", "1010 0101 0110", "1110 0100 1101", "1011 0010 0101", | |
| 145 | 0x05B5, 0x02B6, 0x0A56, 0x0E4D, 0x0B25, | |
| 146 | //* 1453 -1457 */ "1011 0101 0010", "1011 0110 1010", "0101 1010 1101", "0010 1010 1110", "1001 0010 1111", | |
| 147 | 0x0B52, 0x0B6A, 0x05AD, 0x02AE, 0x092F, | |
| 148 | //* 1458 -1462 */ "0100 1001 0111", "0110 0100 1011", "0110 1010 0101", "0110 1010 1100", "1010 1101 0110", | |
| 149 | 0x0497, 0x064B, 0x06A5, 0x06AC, 0x0AD6, | |
| 150 | //* 1463 -1467 */ "0101 0101 1101", "0100 1001 1101", "1010 0100 1101", "1101 0001 0110", "1101 1001 0101", | |
| 151 | 0x055D, 0x049D, 0x0A4D, 0x0D16, 0x0D95, | |
| 152 | //* 1468 -1472 */ "0101 1010 1010", "0101 1011 0101", "0010 1101 1010", "1001 0101 1011", "0100 1010 1101", | |
| 153 | 0x05AA, 0x05B5, 0x02DA, 0x095B, 0x04AD, | |
| 154 | //* 1473 -1477 */ "0101 1001 0101", "0110 1100 1010", "0110 1110 0100", "1010 1110 1010", "0100 1111 0101", | |
| 155 | 0x0595, 0x06CA, 0x06E4, 0x0AEA, 0x04F5, | |
| 156 | //* 1478 -1480 */ "0010 1011 0110", "1001 0101 0110", "1010 1010 1010" | |
| 157 | 0x02B6, 0x0956, 0x0AAA | |
| 158 | }; | |
| 159 | ||
| 160 | int32_t getUmalqura_MonthLength(int32_t y, int32_t m) { | |
| 161 | int32_t mask = (int32_t) (0x01 << (11 - m)); // set mask for bit corresponding to month | |
| 162 | if((UMALQURA_MONTHLENGTH[y] & mask) == 0 ) | |
| 163 | return 29; | |
| 164 | else | |
| 165 | return 30; | |
| 166 | ||
| 167 | } | |
| 168 | ||
| 374ca955 A |
169 | //------------------------------------------------------------------------- |
| 170 | // Constructors... | |
| 171 | //------------------------------------------------------------------------- | |
| 172 | ||
| 57a6839d A |
173 | const char *IslamicCalendar::getType() const { |
| 174 | const char *sType = NULL; | |
| 175 | ||
| 176 | switch (cType) { | |
| 177 | case CIVIL: | |
| 178 | sType = "islamic-civil"; | |
| 179 | break; | |
| 180 | case ASTRONOMICAL: | |
| 181 | sType = "islamic"; | |
| 182 | break; | |
| 183 | case TBLA: | |
| 184 | sType = "islamic-tbla"; | |
| 185 | break; | |
| 186 | case UMALQURA: | |
| 187 | sType = "islamic-umalqura"; | |
| 188 | break; | |
| 189 | default: | |
| 190 | U_ASSERT(false); // out of range | |
| 191 | sType = "islamic"; // "islamic" is used as the generic type | |
| 192 | break; | |
| 46f4442e | 193 | } |
| 57a6839d | 194 | return sType; |
| 374ca955 A |
195 | } |
| 196 | ||
| 197 | Calendar* IslamicCalendar::clone() const { | |
| 46f4442e | 198 | return new IslamicCalendar(*this); |
| 374ca955 A |
199 | } |
| 200 | ||
| 57a6839d | 201 | IslamicCalendar::IslamicCalendar(const Locale& aLocale, UErrorCode& success, ECalculationType type) |
| 46f4442e | 202 | : Calendar(TimeZone::createDefault(), aLocale, success), |
| 57a6839d | 203 | cType(type) |
| 374ca955 | 204 | { |
| 46f4442e | 205 | setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly. |
| 374ca955 A |
206 | } |
| 207 | ||
| 57a6839d | 208 | IslamicCalendar::IslamicCalendar(const IslamicCalendar& other) : Calendar(other), cType(other.cType) { |
| 374ca955 A |
209 | } |
| 210 | ||
| 211 | IslamicCalendar::~IslamicCalendar() | |
| 212 | { | |
| 213 | } | |
| 214 | ||
| 57a6839d | 215 | void IslamicCalendar::setCalculationType(ECalculationType type, UErrorCode &status) |
| 374ca955 | 216 | { |
| 57a6839d | 217 | if (cType != type) { |
| 46f4442e A |
218 | // The fields of the calendar will become invalid, because the calendar |
| 219 | // rules are different | |
| 220 | UDate m = getTimeInMillis(status); | |
| 57a6839d | 221 | cType = type; |
| 46f4442e A |
222 | clear(); |
| 223 | setTimeInMillis(m, status); | |
| 224 | } | |
| 374ca955 | 225 | } |
| 46f4442e | 226 | |
| 374ca955 | 227 | /** |
| 46f4442e A |
228 | * Returns <code>true</code> if this object is using the fixed-cycle civil |
| 229 | * calendar, or <code>false</code> if using the religious, astronomical | |
| 230 | * calendar. | |
| 231 | * @draft ICU 2.4 | |
| 232 | */ | |
| 374ca955 | 233 | UBool IslamicCalendar::isCivil() { |
| 57a6839d | 234 | return (cType == CIVIL); |
| 374ca955 | 235 | } |
| 46f4442e | 236 | |
| 374ca955 A |
237 | //------------------------------------------------------------------------- |
| 238 | // Minimum / Maximum access functions | |
| 239 | //------------------------------------------------------------------------- | |
| 240 | ||
| 46f4442e A |
241 | // Note: Current IslamicCalendar implementation does not work |
| 242 | // well with negative years. | |
| 243 | ||
| 4388f060 A |
244 | // TODO: In some cases the current ICU Islamic calendar implementation shows |
| 245 | // a month as having 31 days. Since date parsing now uses range checks based | |
| 246 | // on the table below, we need to change the range for last day of month to | |
| 247 | // include 31 as a workaround until the implementation is fixed. | |
| 374ca955 | 248 | static const int32_t LIMITS[UCAL_FIELD_COUNT][4] = { |
| 46f4442e A |
249 | // Minimum Greatest Least Maximum |
| 250 | // Minimum Maximum | |
| 251 | { 0, 0, 0, 0}, // ERA | |
| 252 | { 1, 1, 5000000, 5000000}, // YEAR | |
| 253 | { 0, 0, 11, 11}, // MONTH | |
| 254 | { 1, 1, 50, 51}, // WEEK_OF_YEAR | |
| 255 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH | |
| 4388f060 | 256 | { 1, 1, 29, 31}, // DAY_OF_MONTH - 31 to workaround for cal implementation bug, should be 30 |
| 46f4442e A |
257 | { 1, 1, 354, 355}, // DAY_OF_YEAR |
| 258 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK | |
| 259 | { -1, -1, 5, 5}, // DAY_OF_WEEK_IN_MONTH | |
| 260 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM | |
| 261 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR | |
| 262 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY | |
| 263 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE | |
| 264 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND | |
| 265 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND | |
| 266 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET | |
| 267 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET | |
| 268 | { 1, 1, 5000000, 5000000}, // YEAR_WOY | |
| 269 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL | |
| 270 | { 1, 1, 5000000, 5000000}, // EXTENDED_YEAR | |
| 271 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY | |
| 272 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECONDS_IN_DAY | |
| 273 | {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // IS_LEAP_MONTH | |
| 374ca955 A |
274 | }; |
| 275 | ||
| 276 | /** | |
| 46f4442e A |
277 | * @draft ICU 2.4 |
| 278 | */ | |
| 374ca955 | 279 | int32_t IslamicCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const { |
| 46f4442e | 280 | return LIMITS[field][limitType]; |
| 374ca955 A |
281 | } |
| 282 | ||
| 283 | //------------------------------------------------------------------------- | |
| 284 | // Assorted calculation utilities | |
| 285 | // | |
| 286 | ||
| 57a6839d A |
287 | // table mapping extended year to julian day |
| 288 | // for year start in the Umm-Al-Qura calendar. | |
| 289 | // 660 bytes | |
| 290 | static const int32_t jdForUmAlQuraYrStart[] = { | |
| 291 | // jdIsUm isYr | |
| 292 | 466700, // 1318 | |
| 293 | 467055, // 1319 | |
| 294 | 467410, // 1320 | |
| 295 | 467764, // 1321 | |
| 296 | 468119, // 1322 | |
| 297 | 468473, // 1323 | |
| 298 | 468827, // 1324 | |
| 299 | 469181, // 1325 | |
| 300 | 469536, // 1326 | |
| 301 | 469890, // 1327 | |
| 302 | 470245, // 1328 | |
| 303 | 470599, // 1329 | |
| 304 | 470953, // 1330 | |
| 305 | 471307, // 1331 | |
| 306 | 471662, // 1332 | |
| 307 | 472016, // 1333 | |
| 308 | 472371, // 1334 | |
| 309 | 472725, // 1335 | |
| 310 | 473080, // 1336 | |
| 311 | 473434, // 1337 | |
| 312 | 473788, // 1338 | |
| 313 | 474142, // 1339 | |
| 314 | 474497, // 1340 | |
| 315 | 474851, // 1341 | |
| 316 | 475206, // 1342 | |
| 317 | 475560, // 1343 | |
| 318 | 475914, // 1344 | |
| 319 | 476268, // 1345 | |
| 320 | 476622, // 1346 | |
| 321 | 476977, // 1347 | |
| 322 | 477332, // 1348 | |
| 323 | 477686, // 1349 | |
| 324 | 478041, // 1350 | |
| 325 | 478395, // 1351 | |
| 326 | 478749, // 1352 | |
| 327 | 479103, // 1353 | |
| 328 | 479458, // 1354 | |
| 329 | 479812, // 1355 | |
| 330 | 480167, // 1356 | |
| 331 | 480522, // 1357 | |
| 332 | 480876, // 1358 | |
| 333 | 481230, // 1359 | |
| 334 | 481584, // 1360 | |
| 335 | 481938, // 1361 | |
| 336 | 482293, // 1362 | |
| 337 | 482647, // 1363 | |
| 338 | 483002, // 1364 | |
| 339 | 483356, // 1365 | |
| 340 | 483710, // 1366 | |
| 341 | 484064, // 1367 | |
| 342 | 484419, // 1368 | |
| 343 | 484773, // 1369 | |
| 344 | 485128, // 1370 | |
| 345 | 485483, // 1371 | |
| 346 | 485837, // 1372 | |
| 347 | 486191, // 1373 | |
| 348 | 486545, // 1374 | |
| 349 | 486899, // 1375 | |
| 350 | 487254, // 1376 | |
| 351 | 487609, // 1377 | |
| 352 | 487963, // 1378 | |
| 353 | 488318, // 1379 | |
| 354 | 488672, // 1380 | |
| 355 | 489026, // 1381 | |
| 356 | 489380, // 1382 | |
| 357 | 489734, // 1383 | |
| 358 | 490089, // 1384 | |
| 359 | 490444, // 1385 | |
| 360 | 490798, // 1386 | |
| 361 | 491152, // 1387 | |
| 362 | 491506, // 1388 | |
| 363 | 491860, // 1389 | |
| 364 | 492215, // 1390 | |
| 365 | 492570, // 1391 | |
| 366 | 492924, // 1392 | |
| 367 | 493279, // 1393 | |
| 368 | 493633, // 1394 | |
| 369 | 493987, // 1395 | |
| 370 | 494341, // 1396 | |
| 371 | 494695, // 1397 | |
| 372 | 495050, // 1398 | |
| 373 | 495404, // 1399 | |
| 374 | 495759, // 1400 | |
| 375 | 496113, // 1401 | |
| 376 | 496467, // 1402 | |
| 377 | 496821, // 1403 | |
| 378 | 497176, // 1404 | |
| 379 | 497530, // 1405 | |
| 380 | 497885, // 1406 | |
| 381 | 498240, // 1407 | |
| 382 | 498594, // 1408 | |
| 383 | 498948, // 1409 | |
| 384 | 499302, // 1410 | |
| 385 | 499656, // 1411 | |
| 386 | 500011, // 1412 | |
| 387 | 500366, // 1413 | |
| 388 | 500720, // 1414 | |
| 389 | 501075, // 1415 | |
| 390 | 501429, // 1416 | |
| 391 | 501783, // 1417 | |
| 392 | 502137, // 1418 | |
| 393 | 502492, // 1419 | |
| 394 | 502846, // 1420 | |
| 395 | 503201, // 1421 | |
| 396 | 503555, // 1422 | |
| 397 | 503909, // 1423 | |
| 398 | 504263, // 1424 | |
| 399 | 504617, // 1425 | |
| 400 | 504972, // 1426 | |
| 401 | 505327, // 1427 | |
| 402 | 505681, // 1428 | |
| 403 | 506036, // 1429 | |
| 404 | 506390, // 1430 | |
| 405 | 506744, // 1431 | |
| 406 | 507098, // 1432 | |
| 407 | 507452, // 1433 | |
| 408 | 507807, // 1434 | |
| 409 | 508161, // 1435 | |
| 410 | 508516, // 1436 | |
| 411 | 508870, // 1437 | |
| 412 | 509224, // 1438 | |
| 413 | 509578, // 1439 | |
| 414 | 509933, // 1440 | |
| 415 | 510287, // 1441 | |
| 416 | 510642, // 1442 | |
| 417 | 510996, // 1443 | |
| 418 | 511351, // 1444 | |
| 419 | 511705, // 1445 | |
| 420 | 512059, // 1446 | |
| 421 | 512413, // 1447 | |
| 422 | 512768, // 1448 | |
| 423 | 513123, // 1449 | |
| 424 | 513477, // 1450 | |
| 425 | 513831, // 1451 | |
| 426 | 514186, // 1452 | |
| 427 | 514540, // 1453 | |
| 428 | 514894, // 1454 | |
| 429 | 515249, // 1455 | |
| 430 | 515604, // 1456 | |
| 431 | 515958, // 1457 | |
| 432 | 516313, // 1458 | |
| 433 | 516667, // 1459 | |
| 434 | 517021, // 1460 | |
| 435 | 517375, // 1461 | |
| 436 | 517729, // 1462 | |
| 437 | 518084, // 1463 | |
| 438 | 518439, // 1464 | |
| 439 | 518793, // 1465 | |
| 440 | 519147, // 1466 | |
| 441 | 519501, // 1467 | |
| 442 | 519856, // 1468 | |
| 443 | 520210, // 1469 | |
| 444 | 520565, // 1470 | |
| 445 | 520919, // 1471 | |
| 446 | 521274, // 1472 | |
| 447 | 521628, // 1473 | |
| 448 | 521982, // 1474 | |
| 449 | 522336, // 1475 | |
| 450 | 522690, // 1476 | |
| 451 | 523045, // 1477 | |
| 452 | 523400, // 1478 | |
| 453 | 523754, // 1479 | |
| 454 | 524108, // 1480 | |
| 455 | }; | |
| 456 | ||
| 374ca955 | 457 | /** |
| 46f4442e A |
458 | * Determine whether a year is a leap year in the Islamic civil calendar |
| 459 | */ | |
| 374ca955 A |
460 | UBool IslamicCalendar::civilLeapYear(int32_t year) |
| 461 | { | |
| 46f4442e | 462 | return (14 + 11 * year) % 30 < 11; |
| 374ca955 | 463 | } |
| 46f4442e | 464 | |
| 374ca955 | 465 | /** |
| 46f4442e A |
466 | * Return the day # on which the given year starts. Days are counted |
| 467 | * from the Hijri epoch, origin 0. | |
| 468 | */ | |
| 57a6839d A |
469 | int32_t IslamicCalendar::yearStart(int32_t year) const{ |
| 470 | if (cType == CIVIL || cType == TBLA || | |
| 471 | (cType == UMALQURA && (year < UMALQURA_YEAR_START || year > UMALQURA_YEAR_END))) | |
| 472 | { | |
| 473 | // The following is similar to part of | |
| 474 | // Dershowitz & Reingold, 3rd ed., formula 6.3 | |
| 475 | // adjusted to give day offset within current epoch. | |
| 729e4ab9 | 476 | return (year-1)*354 + ClockMath::floorDivide((3+11*year),30); |
| 57a6839d | 477 | } else if(cType==ASTRONOMICAL){ |
| 46f4442e | 478 | return trueMonthStart(12*(year-1)); |
| 57a6839d A |
479 | } else { |
| 480 | return jdForUmAlQuraYrStart[year - UMALQURA_YEAR_START]; | |
| 46f4442e | 481 | } |
| 374ca955 | 482 | } |
| 46f4442e | 483 | |
| 374ca955 | 484 | /** |
| 46f4442e A |
485 | * Return the day # on which the given month starts. Days are counted |
| 486 | * from the Hijri epoch, origin 0. | |
| 487 | * | |
| 488 | * @param year The hijri year | |
| 57a6839d | 489 | * @param year The hijri month, 0-based (assumed to be in range 0..11) |
| 46f4442e | 490 | */ |
| 374ca955 | 491 | int32_t IslamicCalendar::monthStart(int32_t year, int32_t month) const { |
| 57a6839d A |
492 | if (cType == CIVIL || cType == TBLA) { |
| 493 | // The following is similar to part of | |
| 494 | // Dershowitz & Reingold, 3rd ed., formula 6.3 | |
| 495 | // adjusted for 0-based months and to give day offset within current epoch. | |
| 496 | // This does not handle months out of the range 0..11 | |
| 497 | return (year-1)*354 + (int32_t)ClockMath::floorDivide((3+11*year),30) + | |
| 498 | (int32_t)uprv_ceil(29.5*month); | |
| 499 | } else if(cType==ASTRONOMICAL){ | |
| 46f4442e | 500 | return trueMonthStart(12*(year-1) + month); |
| 57a6839d A |
501 | } else { |
| 502 | int32_t ms = yearStart(year); | |
| 503 | for(int i=0; i< month; i++){ | |
| 504 | ms+= handleGetMonthLength(year, i); | |
| 505 | } | |
| 506 | return ms; | |
| 46f4442e | 507 | } |
| 374ca955 | 508 | } |
| 46f4442e | 509 | |
| 374ca955 | 510 | /** |
| 46f4442e A |
511 | * Find the day number on which a particular month of the true/lunar |
| 512 | * Islamic calendar starts. | |
| 513 | * | |
| 514 | * @param month The month in question, origin 0 from the Hijri epoch | |
| 515 | * | |
| 516 | * @return The day number on which the given month starts. | |
| 517 | */ | |
| 374ca955 A |
518 | int32_t IslamicCalendar::trueMonthStart(int32_t month) const |
| 519 | { | |
| 46f4442e A |
520 | UErrorCode status = U_ZERO_ERROR; |
| 521 | int32_t start = CalendarCache::get(&gMonthCache, month, status); | |
| 522 | ||
| 523 | if (start==0) { | |
| 524 | // Make a guess at when the month started, using the average length | |
| 525 | UDate origin = HIJRA_MILLIS | |
| 729e4ab9 | 526 | + uprv_floor(month * CalendarAstronomer::SYNODIC_MONTH) * kOneDay; |
| 46f4442e A |
527 | |
| 528 | // moonAge will fail due to memory allocation error | |
| 529 | double age = moonAge(origin, status); | |
| 530 | if (U_FAILURE(status)) { | |
| 531 | goto trueMonthStartEnd; | |
| 532 | } | |
| 533 | ||
| 534 | if (age >= 0) { | |
| 535 | // The month has already started | |
| 536 | do { | |
| 537 | origin -= kOneDay; | |
| 538 | age = moonAge(origin, status); | |
| 539 | if (U_FAILURE(status)) { | |
| 540 | goto trueMonthStartEnd; | |
| 541 | } | |
| 542 | } while (age >= 0); | |
| 543 | } | |
| 544 | else { | |
| 545 | // Preceding month has not ended yet. | |
| 546 | do { | |
| 547 | origin += kOneDay; | |
| 548 | age = moonAge(origin, status); | |
| 549 | if (U_FAILURE(status)) { | |
| 550 | goto trueMonthStartEnd; | |
| 551 | } | |
| 552 | } while (age < 0); | |
| 553 | } | |
| 729e4ab9 | 554 | start = (int32_t)ClockMath::floorDivide((origin - HIJRA_MILLIS), (double)kOneDay) + 1; |
| 46f4442e | 555 | CalendarCache::put(&gMonthCache, month, start, status); |
| 374ca955 | 556 | } |
| 46f4442e A |
557 | trueMonthStartEnd : |
| 558 | if(U_FAILURE(status)) { | |
| 559 | start = 0; | |
| 374ca955 | 560 | } |
| 46f4442e | 561 | return start; |
| 374ca955 A |
562 | } |
| 563 | ||
| 564 | /** | |
| 46f4442e A |
565 | * Return the "age" of the moon at the given time; this is the difference |
| 566 | * in ecliptic latitude between the moon and the sun. This method simply | |
| 567 | * calls CalendarAstronomer.moonAge, converts to degrees, | |
| 568 | * and adjusts the result to be in the range [-180, 180]. | |
| 569 | * | |
| 570 | * @param time The time at which the moon's age is desired, | |
| 571 | * in millis since 1/1/1970. | |
| 572 | */ | |
| 573 | double IslamicCalendar::moonAge(UDate time, UErrorCode &status) | |
| 374ca955 | 574 | { |
| 46f4442e A |
575 | double age = 0; |
| 576 | ||
| 577 | umtx_lock(&astroLock); | |
| 578 | if(gIslamicCalendarAstro == NULL) { | |
| 579 | gIslamicCalendarAstro = new CalendarAstronomer(); | |
| 580 | if (gIslamicCalendarAstro == NULL) { | |
| 581 | status = U_MEMORY_ALLOCATION_ERROR; | |
| 582 | return age; | |
| 583 | } | |
| 584 | ucln_i18n_registerCleanup(UCLN_I18N_ISLAMIC_CALENDAR, calendar_islamic_cleanup); | |
| 585 | } | |
| 586 | gIslamicCalendarAstro->setTime(time); | |
| 587 | age = gIslamicCalendarAstro->getMoonAge(); | |
| 588 | umtx_unlock(&astroLock); | |
| 589 | ||
| 590 | // Convert to degrees and normalize... | |
| 591 | age = age * 180 / CalendarAstronomer::PI; | |
| 592 | if (age > 180) { | |
| 593 | age = age - 360; | |
| 594 | } | |
| 595 | ||
| 596 | return age; | |
| 374ca955 A |
597 | } |
| 598 | ||
| 599 | //---------------------------------------------------------------------- | |
| 600 | // Calendar framework | |
| 601 | //---------------------------------------------------------------------- | |
| 602 | ||
| 603 | /** | |
| 46f4442e A |
604 | * Return the length (in days) of the given month. |
| 605 | * | |
| 606 | * @param year The hijri year | |
| 607 | * @param year The hijri month, 0-based | |
| 608 | * @draft ICU 2.4 | |
| 609 | */ | |
| 374ca955 A |
610 | int32_t IslamicCalendar::handleGetMonthLength(int32_t extendedYear, int32_t month) const { |
| 611 | ||
| 46f4442e A |
612 | int32_t length = 0; |
| 613 | ||
| 57a6839d A |
614 | if (cType == CIVIL || cType == TBLA || |
| 615 | (cType == UMALQURA && (extendedYear<UMALQURA_YEAR_START || extendedYear>UMALQURA_YEAR_END)) ) { | |
| 46f4442e A |
616 | length = 29 + (month+1) % 2; |
| 617 | if (month == DHU_AL_HIJJAH && civilLeapYear(extendedYear)) { | |
| 618 | length++; | |
| 619 | } | |
| 57a6839d | 620 | } else if(cType == ASTRONOMICAL){ |
| 46f4442e A |
621 | month = 12*(extendedYear-1) + month; |
| 622 | length = trueMonthStart(month+1) - trueMonthStart(month) ; | |
| 57a6839d A |
623 | } else { |
| 624 | length = getUmalqura_MonthLength(extendedYear - UMALQURA_YEAR_START, month); | |
| 374ca955 | 625 | } |
| 46f4442e | 626 | return length; |
| 374ca955 A |
627 | } |
| 628 | ||
| 629 | /** | |
| 46f4442e A |
630 | * Return the number of days in the given Islamic year |
| 631 | * @draft ICU 2.4 | |
| 632 | */ | |
| 374ca955 | 633 | int32_t IslamicCalendar::handleGetYearLength(int32_t extendedYear) const { |
| 57a6839d A |
634 | if (cType == CIVIL || cType == TBLA || |
| 635 | (cType == UMALQURA && (extendedYear<UMALQURA_YEAR_START || extendedYear>UMALQURA_YEAR_END)) ) { | |
| 46f4442e | 636 | return 354 + (civilLeapYear(extendedYear) ? 1 : 0); |
| 57a6839d | 637 | } else if(cType == ASTRONOMICAL){ |
| 46f4442e A |
638 | int32_t month = 12*(extendedYear-1); |
| 639 | return (trueMonthStart(month + 12) - trueMonthStart(month)); | |
| 57a6839d A |
640 | } else { |
| 641 | int len = 0; | |
| 642 | for(int i=0; i<12; i++) { | |
| 643 | len += handleGetMonthLength(extendedYear, i); | |
| 644 | } | |
| 645 | return len; | |
| 46f4442e | 646 | } |
| 374ca955 | 647 | } |
| 46f4442e | 648 | |
| 374ca955 A |
649 | //------------------------------------------------------------------------- |
| 650 | // Functions for converting from field values to milliseconds.... | |
| 651 | //------------------------------------------------------------------------- | |
| 652 | ||
| 653 | // Return JD of start of given month/year | |
| 57a6839d A |
654 | // Calendar says: |
| 655 | // Get the Julian day of the day BEFORE the start of this year. | |
| 656 | // If useMonth is true, get the day before the start of the month. | |
| 657 | // Hence the -1 | |
| 374ca955 | 658 | /** |
| 46f4442e A |
659 | * @draft ICU 2.4 |
| 660 | */ | |
| 374ca955 | 661 | int32_t IslamicCalendar::handleComputeMonthStart(int32_t eyear, int32_t month, UBool /* useMonth */) const { |
| 57a6839d A |
662 | // This may be called by Calendar::handleComputeJulianDay with months out of the range |
| 663 | // 0..11. Need to handle that here since monthStart requires months in the range 0.11. | |
| 664 | if (month > 11) { | |
| 665 | eyear += (month / 12); | |
| 666 | month %= 12; | |
| 667 | } else if (month < 0) { | |
| 668 | month++; | |
| 669 | eyear += (month / 12) - 1; | |
| 670 | month = (month % 12) + 11; | |
| 671 | } | |
| 672 | return monthStart(eyear, month) + ((cType == TBLA)? ASTRONOMICAL_EPOC: CIVIL_EPOC) - 1; | |
| 374ca955 A |
673 | } |
| 674 | ||
| 675 | //------------------------------------------------------------------------- | |
| 676 | // Functions for converting from milliseconds to field values | |
| 677 | //------------------------------------------------------------------------- | |
| 678 | ||
| 46f4442e A |
679 | /** |
| 680 | * @draft ICU 2.4 | |
| 681 | */ | |
| 374ca955 A |
682 | int32_t IslamicCalendar::handleGetExtendedYear() { |
| 683 | int32_t year; | |
| 684 | if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) { | |
| 685 | year = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1 | |
| 686 | } else { | |
| 687 | year = internalGet(UCAL_YEAR, 1); // Default to year 1 | |
| 688 | } | |
| 689 | return year; | |
| 690 | } | |
| 691 | ||
| 692 | /** | |
| 46f4442e A |
693 | * Override Calendar to compute several fields specific to the Islamic |
| 694 | * calendar system. These are: | |
| 695 | * | |
| 696 | * <ul><li>ERA | |
| 697 | * <li>YEAR | |
| 698 | * <li>MONTH | |
| 699 | * <li>DAY_OF_MONTH | |
| 700 | * <li>DAY_OF_YEAR | |
| 701 | * <li>EXTENDED_YEAR</ul> | |
| 702 | * | |
| 703 | * The DAY_OF_WEEK and DOW_LOCAL fields are already set when this | |
| 704 | * method is called. The getGregorianXxx() methods return Gregorian | |
| 705 | * calendar equivalents for the given Julian day. | |
| 706 | * @draft ICU 2.4 | |
| 707 | */ | |
| 708 | void IslamicCalendar::handleComputeFields(int32_t julianDay, UErrorCode &status) { | |
| 374ca955 | 709 | int32_t year, month, dayOfMonth, dayOfYear; |
| 57a6839d A |
710 | int32_t startDate; |
| 711 | int32_t days = julianDay - CIVIL_EPOC; | |
| 46f4442e | 712 | |
| 57a6839d A |
713 | if (cType == CIVIL || cType == TBLA) { |
| 714 | if(cType == TBLA) { | |
| 715 | days = julianDay - ASTRONOMICAL_EPOC; | |
| 716 | } | |
| 717 | // Use the civil calendar approximation, which is just arithmetic. | |
| 718 | // The following is similar to part of | |
| 719 | // Dershowitz & Reingold, 3rd ed., formula 6.4 | |
| 729e4ab9 | 720 | year = (int)ClockMath::floorDivide( (double)(30 * days + 10646) , 10631.0 ); |
| 374ca955 A |
721 | month = (int32_t)uprv_ceil((days - 29 - yearStart(year)) / 29.5 ); |
| 722 | month = month<11?month:11; | |
| 723 | startDate = monthStart(year, month); | |
| 57a6839d | 724 | } else if(cType == ASTRONOMICAL){ |
| 374ca955 A |
725 | // Guess at the number of elapsed full months since the epoch |
| 726 | int32_t months = (int32_t)uprv_floor((double)days / CalendarAstronomer::SYNODIC_MONTH); | |
| 727 | ||
| 57a6839d | 728 | startDate = (int32_t)uprv_floor(months * CalendarAstronomer::SYNODIC_MONTH); |
| 374ca955 | 729 | |
| 46f4442e A |
730 | double age = moonAge(internalGetTime(), status); |
| 731 | if (U_FAILURE(status)) { | |
| 57a6839d A |
732 | status = U_MEMORY_ALLOCATION_ERROR; |
| 733 | return; | |
| 46f4442e | 734 | } |
| 729e4ab9 | 735 | if ( days - startDate >= 25 && age > 0) { |
| 374ca955 A |
736 | // If we're near the end of the month, assume next month and search backwards |
| 737 | months++; | |
| 738 | } | |
| 739 | ||
| 740 | // Find out the last time that the new moon was actually visible at this longitude | |
| 741 | // This returns midnight the night that the moon was visible at sunset. | |
| 742 | while ((startDate = trueMonthStart(months)) > days) { | |
| 743 | // If it was after the date in question, back up a month and try again | |
| 744 | months--; | |
| 745 | } | |
| 46f4442e | 746 | |
| 374ca955 A |
747 | year = months / 12 + 1; |
| 748 | month = months % 12; | |
| 57a6839d A |
749 | } else if(cType == UMALQURA) { |
| 750 | int32_t umalquraStartdays = yearStart(UMALQURA_YEAR_START) ; | |
| 751 | if( days < umalquraStartdays){ | |
| 752 | //Use Civil calculation | |
| 753 | year = (int)ClockMath::floorDivide( (double)(30 * days + 10646) , 10631.0 ); | |
| 754 | month = (int32_t)uprv_ceil((days - 29 - yearStart(year)) / 29.5 ); | |
| 755 | month = month<11?month:11; | |
| 756 | startDate = monthStart(year, month); | |
| 757 | }else{ | |
| 758 | int y =UMALQURA_YEAR_START-1, m =0; | |
| 759 | long d = 1; | |
| 760 | while(d > 0){ | |
| 761 | y++; | |
| 762 | d = days - yearStart(y) +1; | |
| 763 | if(d == handleGetYearLength(y)){ | |
| 764 | m=11; | |
| 765 | break; | |
| 766 | }else if(d < handleGetYearLength(y) ){ | |
| 767 | int monthLen = handleGetMonthLength(y, m); | |
| 768 | m=0; | |
| 769 | while(d > monthLen){ | |
| 770 | d -= monthLen; | |
| 771 | m++; | |
| 772 | monthLen = handleGetMonthLength(y, m); | |
| 773 | } | |
| 774 | break; | |
| 775 | } | |
| 776 | } | |
| 777 | year = y; | |
| 778 | month = m; | |
| 779 | } | |
| 780 | } else { // invalid 'civil' | |
| 781 | U_ASSERT(false); // should not get here, out of range | |
| 782 | year=month=0; | |
| 374ca955 | 783 | } |
| 46f4442e | 784 | |
| 374ca955 A |
785 | dayOfMonth = (days - monthStart(year, month)) + 1; |
| 786 | ||
| 787 | // Now figure out the day of the year. | |
| 57a6839d A |
788 | dayOfYear = (days - monthStart(year, 0)) + 1; |
| 789 | ||
| 374ca955 A |
790 | |
| 791 | internalSet(UCAL_ERA, 0); | |
| 792 | internalSet(UCAL_YEAR, year); | |
| 793 | internalSet(UCAL_EXTENDED_YEAR, year); | |
| 794 | internalSet(UCAL_MONTH, month); | |
| 795 | internalSet(UCAL_DAY_OF_MONTH, dayOfMonth); | |
| 796 | internalSet(UCAL_DAY_OF_YEAR, dayOfYear); | |
| 797 | } | |
| 798 | ||
| 799 | UBool | |
| 800 | IslamicCalendar::inDaylightTime(UErrorCode& status) const | |
| 801 | { | |
| 46f4442e A |
802 | // copied from GregorianCalendar |
| 803 | if (U_FAILURE(status) || (&(getTimeZone()) == NULL && !getTimeZone().useDaylightTime())) | |
| 804 | return FALSE; | |
| 374ca955 A |
805 | |
| 806 | // Force an update of the state of the Calendar. | |
| 46f4442e | 807 | ((IslamicCalendar*)this)->complete(status); // cast away const |
| 374ca955 | 808 | |
| 46f4442e | 809 | return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE); |
| 374ca955 A |
810 | } |
| 811 | ||
| 57a6839d A |
812 | /** |
| 813 | * The system maintains a static default century start date and Year. They are | |
| 814 | * initialized the first time they are used. Once the system default century date | |
| 815 | * and year are set, they do not change. | |
| 816 | */ | |
| 817 | static UDate gSystemDefaultCenturyStart = DBL_MIN; | |
| 818 | static int32_t gSystemDefaultCenturyStartYear = -1; | |
| 819 | static icu::UInitOnce gSystemDefaultCenturyInit = U_INITONCE_INITIALIZER; | |
| 374ca955 A |
820 | |
| 821 | ||
| 822 | UBool IslamicCalendar::haveDefaultCentury() const | |
| 823 | { | |
| 46f4442e | 824 | return TRUE; |
| 374ca955 A |
825 | } |
| 826 | ||
| 827 | UDate IslamicCalendar::defaultCenturyStart() const | |
| 374ca955 | 828 | { |
| 46f4442e | 829 | // lazy-evaluate systemDefaultCenturyStart |
| 57a6839d A |
830 | umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury); |
| 831 | return gSystemDefaultCenturyStart; | |
| 374ca955 A |
832 | } |
| 833 | ||
| 57a6839d | 834 | int32_t IslamicCalendar::defaultCenturyStartYear() const |
| 374ca955 | 835 | { |
| 46f4442e | 836 | // lazy-evaluate systemDefaultCenturyStartYear |
| 57a6839d A |
837 | umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury); |
| 838 | return gSystemDefaultCenturyStartYear; | |
| 374ca955 A |
839 | } |
| 840 | ||
| 57a6839d A |
841 | |
| 842 | void U_CALLCONV | |
| 374ca955 A |
843 | IslamicCalendar::initializeSystemDefaultCentury() |
| 844 | { | |
| 46f4442e A |
845 | // initialize systemDefaultCentury and systemDefaultCenturyYear based |
| 846 | // on the current time. They'll be set to 80 years before | |
| 847 | // the current time. | |
| 729e4ab9 A |
848 | UErrorCode status = U_ZERO_ERROR; |
| 849 | IslamicCalendar calendar(Locale("@calendar=islamic-civil"),status); | |
| 57a6839d | 850 | if (U_SUCCESS(status)) { |
| 729e4ab9 A |
851 | calendar.setTime(Calendar::getNow(), status); |
| 852 | calendar.add(UCAL_YEAR, -80, status); | |
| 57a6839d A |
853 | |
| 854 | gSystemDefaultCenturyStart = calendar.getTime(status); | |
| 855 | gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status); | |
| 374ca955 | 856 | } |
| 729e4ab9 A |
857 | // We have no recourse upon failure unless we want to propagate the failure |
| 858 | // out. | |
| 374ca955 A |
859 | } |
| 860 | ||
| 57a6839d A |
861 | |
| 862 | ||
| 374ca955 A |
863 | UOBJECT_DEFINE_RTTI_IMPLEMENTATION(IslamicCalendar) |
| 864 | ||
| 865 | U_NAMESPACE_END | |
| 866 | ||
| 867 | #endif | |
| 868 |