X-Git-Url: https://git.saurik.com/apple/icu.git/blobdiff_plain/f3c0d7a59d99c2a94c6b8822291f0e42be3773c9..249c4c5ea9376c24572daf9c2effa7484a282f14:/icuSources/i18n/japancal.cpp diff --git a/icuSources/i18n/japancal.cpp b/icuSources/i18n/japancal.cpp index 17b4e076..0fead593 100644 --- a/icuSources/i18n/japancal.cpp +++ b/icuSources/i18n/japancal.cpp @@ -16,286 +16,105 @@ #include "unicode/utypes.h" #if !UCONFIG_NO_FORMATTING - +#if U_PLATFORM_HAS_WINUWP_API == 0 +#include // getenv() is not available in UWP env +#else +#ifndef WIN32_LEAN_AND_MEAN +# define WIN32_LEAN_AND_MEAN +#endif +# define VC_EXTRALEAN +# define NOUSER +# define NOSERVICE +# define NOIME +# define NOMCX +#include +#endif #include "cmemory.h" +#include "erarules.h" #include "japancal.h" #include "unicode/gregocal.h" #include "umutex.h" #include "uassert.h" - -//#define U_DEBUG_JCAL - -#ifdef U_DEBUG_JCAL -#include -#endif +#include "ucln_in.h" +#include "cstring.h" + +static icu::EraRules * gJapaneseEraRules = nullptr; +static icu::UInitOnce gJapaneseEraRulesInitOnce = U_INITONCE_INITIALIZER; +static int32_t gCurrentEra = 0; + +U_CDECL_BEGIN +static UBool japanese_calendar_cleanup(void) { + if (gJapaneseEraRules) { + delete gJapaneseEraRules; + gJapaneseEraRules = nullptr; + } + gCurrentEra = 0; + gJapaneseEraRulesInitOnce.reset(); + return TRUE; +} +U_CDECL_END U_NAMESPACE_BEGIN UOBJECT_DEFINE_RTTI_IMPLEMENTATION(JapaneseCalendar) -// Gregorian date of each emperor's ascension -// Years are AD, months are 1-based. -static const struct { - int16_t year; - int8_t month; - int8_t day; -} kEraInfo[] = { - // Year Month Day - { 645, 6, 19 }, // Taika 0 - { 650, 2, 15 }, // Hakuchi 1 - { 672, 1, 1 }, // Hakuho 2 - { 686, 7, 20 }, // Shucho 3 - { 701, 3, 21 }, // Taiho 4 - { 704, 5, 10 }, // Keiun 5 - { 708, 1, 11 }, // Wado 6 - { 715, 9, 2 }, // Reiki 7 - { 717, 11, 17 }, // Yoro 8 - { 724, 2, 4 }, // Jinki 9 - { 729, 8, 5 }, // Tempyo 10 - { 749, 4, 14 }, // Tempyo-kampo 11 - { 749, 7, 2 }, // Tempyo-shoho 12 - { 757, 8, 18 }, // Tempyo-hoji 13 - { 765, 1, 7 }, // Tempho-jingo 14 - { 767, 8, 16 }, // Jingo-keiun 15 - { 770, 10, 1 }, // Hoki 16 - { 781, 1, 1 }, // Ten-o 17 - { 782, 8, 19 }, // Enryaku 18 - { 806, 5, 18 }, // Daido 19 - { 810, 9, 19 }, // Konin 20 - { 824, 1, 5 }, // Tencho - { 834, 1, 3 }, // Showa - { 848, 6, 13 }, // Kajo - { 851, 4, 28 }, // Ninju - { 854, 11, 30 }, // Saiko - { 857, 2, 21 }, // Tennan - { 859, 4, 15 }, // Jogan - { 877, 4, 16 }, // Genkei - { 885, 2, 21 }, // Ninna - { 889, 4, 27 }, // Kampyo 30 - { 898, 4, 26 }, // Shotai - { 901, 7, 15 }, // Engi - { 923, 4, 11 }, // Encho - { 931, 4, 26 }, // Shohei - { 938, 5, 22 }, // Tengyo - { 947, 4, 22 }, // Tenryaku - { 957, 10, 27 }, // Tentoku - { 961, 2, 16 }, // Owa - { 964, 7, 10 }, // Koho - { 968, 8, 13 }, // Anna 40 - { 970, 3, 25 }, // Tenroku - { 973, 12, 20 }, // Ten-en - { 976, 7, 13 }, // Jogen - { 978, 11, 29 }, // Tengen - { 983, 4, 15 }, // Eikan - { 985, 4, 27 }, // Kanna - { 987, 4, 5 }, // Ei-en - { 989, 8, 8 }, // Eiso - { 990, 11, 7 }, // Shoryaku - { 995, 2, 22 }, // Chotoku 50 - { 999, 1, 13 }, // Choho - { 1004, 7, 20 }, // Kanko - { 1012, 12, 25 }, // Chowa - { 1017, 4, 23 }, // Kannin - { 1021, 2, 2 }, // Jian - { 1024, 7, 13 }, // Manju - { 1028, 7, 25 }, // Chogen - { 1037, 4, 21 }, // Choryaku - { 1040, 11, 10 }, // Chokyu - { 1044, 11, 24 }, // Kantoku 60 - { 1046, 4, 14 }, // Eisho - { 1053, 1, 11 }, // Tengi - { 1058, 8, 29 }, // Kohei - { 1065, 8, 2 }, // Jiryaku - { 1069, 4, 13 }, // Enkyu - { 1074, 8, 23 }, // Shoho - { 1077, 11, 17 }, // Shoryaku - { 1081, 2, 10 }, // Eiho - { 1084, 2, 7 }, // Otoku - { 1087, 4, 7 }, // Kanji 70 - { 1094, 12, 15 }, // Kaho - { 1096, 12, 17 }, // Eicho - { 1097, 11, 21 }, // Shotoku - { 1099, 8, 28 }, // Kowa - { 1104, 2, 10 }, // Choji - { 1106, 4, 9 }, // Kasho - { 1108, 8, 3 }, // Tennin - { 1110, 7, 13 }, // Ten-ei - { 1113, 7, 13 }, // Eikyu - { 1118, 4, 3 }, // Gen-ei 80 - { 1120, 4, 10 }, // Hoan - { 1124, 4, 3 }, // Tenji - { 1126, 1, 22 }, // Daiji - { 1131, 1, 29 }, // Tensho - { 1132, 8, 11 }, // Chosho - { 1135, 4, 27 }, // Hoen - { 1141, 7, 10 }, // Eiji - { 1142, 4, 28 }, // Koji - { 1144, 2, 23 }, // Tenyo - { 1145, 7, 22 }, // Kyuan 90 - { 1151, 1, 26 }, // Ninpei - { 1154, 10, 28 }, // Kyuju - { 1156, 4, 27 }, // Hogen - { 1159, 4, 20 }, // Heiji - { 1160, 1, 10 }, // Eiryaku - { 1161, 9, 4 }, // Oho - { 1163, 3, 29 }, // Chokan - { 1165, 6, 5 }, // Eiman - { 1166, 8, 27 }, // Nin-an - { 1169, 4, 8 }, // Kao 100 - { 1171, 4, 21 }, // Shoan - { 1175, 7, 28 }, // Angen - { 1177, 8, 4 }, // Jisho - { 1181, 7, 14 }, // Yowa - { 1182, 5, 27 }, // Juei - { 1184, 4, 16 }, // Genryuku - { 1185, 8, 14 }, // Bunji - { 1190, 4, 11 }, // Kenkyu - { 1199, 4, 27 }, // Shoji - { 1201, 2, 13 }, // Kennin 110 - { 1204, 2, 20 }, // Genkyu - { 1206, 4, 27 }, // Ken-ei - { 1207, 10, 25 }, // Shogen - { 1211, 3, 9 }, // Kenryaku - { 1213, 12, 6 }, // Kenpo - { 1219, 4, 12 }, // Shokyu - { 1222, 4, 13 }, // Joo - { 1224, 11, 20 }, // Gennin - { 1225, 4, 20 }, // Karoku - { 1227, 12, 10 }, // Antei 120 - { 1229, 3, 5 }, // Kanki - { 1232, 4, 2 }, // Joei - { 1233, 4, 15 }, // Tempuku - { 1234, 11, 5 }, // Bunryaku - { 1235, 9, 19 }, // Katei - { 1238, 11, 23 }, // Ryakunin - { 1239, 2, 7 }, // En-o - { 1240, 7, 16 }, // Ninji - { 1243, 2, 26 }, // Kangen - { 1247, 2, 28 }, // Hoji 130 - { 1249, 3, 18 }, // Kencho - { 1256, 10, 5 }, // Kogen - { 1257, 3, 14 }, // Shoka - { 1259, 3, 26 }, // Shogen - { 1260, 4, 13 }, // Bun-o - { 1261, 2, 20 }, // Kocho - { 1264, 2, 28 }, // Bun-ei - { 1275, 4, 25 }, // Kenji - { 1278, 2, 29 }, // Koan - { 1288, 4, 28 }, // Shoo 140 - { 1293, 8, 55 }, // Einin - { 1299, 4, 25 }, // Shoan - { 1302, 11, 21 }, // Kengen - { 1303, 8, 5 }, // Kagen - { 1306, 12, 14 }, // Tokuji - { 1308, 10, 9 }, // Enkei - { 1311, 4, 28 }, // Ocho - { 1312, 3, 20 }, // Showa - { 1317, 2, 3 }, // Bunpo - { 1319, 4, 28 }, // Geno 150 - { 1321, 2, 23 }, // Genkyo - { 1324, 12, 9 }, // Shochu - { 1326, 4, 26 }, // Kareki - { 1329, 8, 29 }, // Gentoku - { 1331, 8, 9 }, // Genko - { 1334, 1, 29 }, // Kemmu - { 1336, 2, 29 }, // Engen - { 1340, 4, 28 }, // Kokoku - { 1346, 12, 8 }, // Shohei - { 1370, 7, 24 }, // Kentoku 160 - { 1372, 4, 1 }, // Bunch\u0169 - { 1375, 5, 27 }, // Tenju - { 1379, 3, 22 }, // Koryaku - { 1381, 2, 10 }, // Kowa - { 1384, 4, 28 }, // Gench\u0169 - { 1384, 2, 27 }, // Meitoku - { 1387, 8, 23 }, // Kakei - { 1389, 2, 9 }, // Koo - { 1390, 3, 26 }, // Meitoku - { 1394, 7, 5 }, // Oei 170 - { 1428, 4, 27 }, // Shocho - { 1429, 9, 5 }, // Eikyo - { 1441, 2, 17 }, // Kakitsu - { 1444, 2, 5 }, // Bun-an - { 1449, 7, 28 }, // Hotoku - { 1452, 7, 25 }, // Kyotoku - { 1455, 7, 25 }, // Kosho - { 1457, 9, 28 }, // Choroku - { 1460, 12, 21 }, // Kansho - { 1466, 2, 28 }, // Bunsho 180 - { 1467, 3, 3 }, // Onin - { 1469, 4, 28 }, // Bunmei - { 1487, 7, 29 }, // Chokyo - { 1489, 8, 21 }, // Entoku - { 1492, 7, 19 }, // Meio - { 1501, 2, 29 }, // Bunki - { 1504, 2, 30 }, // Eisho - { 1521, 8, 23 }, // Taiei - { 1528, 8, 20 }, // Kyoroku - { 1532, 7, 29 }, // Tenmon 190 - { 1555, 10, 23 }, // Koji - { 1558, 2, 28 }, // Eiroku - { 1570, 4, 23 }, // Genki - { 1573, 7, 28 }, // Tensho - { 1592, 12, 8 }, // Bunroku - { 1596, 10, 27 }, // Keicho - { 1615, 7, 13 }, // Genwa - { 1624, 2, 30 }, // Kan-ei - { 1644, 12, 16 }, // Shoho - { 1648, 2, 15 }, // Keian 200 - { 1652, 9, 18 }, // Shoo - { 1655, 4, 13 }, // Meiryaku - { 1658, 7, 23 }, // Manji - { 1661, 4, 25 }, // Kanbun - { 1673, 9, 21 }, // Enpo - { 1681, 9, 29 }, // Tenwa - { 1684, 2, 21 }, // Jokyo - { 1688, 9, 30 }, // Genroku - { 1704, 3, 13 }, // Hoei - { 1711, 4, 25 }, // Shotoku 210 - { 1716, 6, 22 }, // Kyoho - { 1736, 4, 28 }, // Genbun - { 1741, 2, 27 }, // Kanpo - { 1744, 2, 21 }, // Enkyo - { 1748, 7, 12 }, // Kan-en - { 1751, 10, 27 }, // Horyaku - { 1764, 6, 2 }, // Meiwa - { 1772, 11, 16 }, // An-ei - { 1781, 4, 2 }, // Tenmei - { 1789, 1, 25 }, // Kansei 220 - { 1801, 2, 5 }, // Kyowa - { 1804, 2, 11 }, // Bunka - { 1818, 4, 22 }, // Bunsei - { 1830, 12, 10 }, // Tenpo - { 1844, 12, 2 }, // Koka - { 1848, 2, 28 }, // Kaei - { 1854, 11, 27 }, // Ansei - { 1860, 3, 18 }, // Man-en - { 1861, 2, 19 }, // Bunkyu - { 1864, 2, 20 }, // Genji 230 - { 1865, 4, 7 }, // Keio 231 - { 1868, 9, 8 }, // Meiji 232 - { 1912, 7, 30 }, // Taisho 233 - { 1926, 12, 25 }, // Showa 234 - { 1989, 1, 8 } // Heisei 235 -}; - -#define kEraCount UPRV_LENGTHOF(kEraInfo) - -/** - * The current era, for reference. - */ -static const int32_t kCurrentEra = (kEraCount-1); // int32_t to match the calendar field type - static const int32_t kGregorianEpoch = 1970; // used as the default value of EXTENDED_YEAR +static const char* TENTATIVE_ERA_VAR_NAME = "ICU_ENABLE_TENTATIVE_ERA"; + + +// Export the following for use by test code. +UBool JapaneseCalendar::enableTentativeEra() { + // Although start date of next Japanese era is planned ahead, a name of + // new era might not be available. This implementation allows tester to + // check a new era without era names by settings below (in priority order). + // By default, such tentative era is disabled. + + // 1. Environment variable ICU_ENABLE_TENTATIVE_ERA=true or false + + UBool includeTentativeEra = FALSE; + +#if U_PLATFORM_HAS_WINUWP_API == 1 + // UWP doesn't allow access to getenv(), but we can call GetEnvironmentVariableW to do the same thing. + UChar varName[26] = {}; + u_charsToUChars(TENTATIVE_ERA_VAR_NAME, varName, static_cast(uprv_strlen(TENTATIVE_ERA_VAR_NAME))); + WCHAR varValue[5] = {}; + DWORD ret = GetEnvironmentVariableW(reinterpret_cast(varName), varValue, UPRV_LENGTHOF(varValue)); + if ((ret == 4) && (_wcsicmp(varValue, L"true") == 0)) { + includeTentativeEra = TRUE; + } +#else + char *envVarVal = getenv(TENTATIVE_ERA_VAR_NAME); + if (envVarVal != NULL && uprv_stricmp(envVarVal, "true") == 0) { + includeTentativeEra = TRUE; + } +#endif + return includeTentativeEra; +} + + +// Initialize global Japanese era data +static void U_CALLCONV initializeEras(UErrorCode &status) { + gJapaneseEraRules = EraRules::createInstance("japanese", JapaneseCalendar::enableTentativeEra(), status); + if (U_FAILURE(status)) { + return; + } + gCurrentEra = gJapaneseEraRules->getCurrentEraIndex(); +} + +static void init(UErrorCode &status) { + umtx_initOnce(gJapaneseEraRulesInitOnce, &initializeEras, status); + ucln_i18n_registerCleanup(UCLN_I18N_JAPANESE_CALENDAR, japanese_calendar_cleanup); +} /* Some platforms don't like to export constants, like old Palm OS and some z/OS configurations. */ uint32_t JapaneseCalendar::getCurrentEra() { - return kCurrentEra; + return gCurrentEra; } JapaneseCalendar::JapaneseCalendar(const Locale& aLocale, UErrorCode& success) : GregorianCalendar(aLocale, success) { + init(success); setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly. } @@ -306,6 +125,9 @@ JapaneseCalendar::~JapaneseCalendar() JapaneseCalendar::JapaneseCalendar(const JapaneseCalendar& source) : GregorianCalendar(source) { + UErrorCode status = U_ZERO_ERROR; + init(status); + U_ASSERT(U_SUCCESS(status)); } JapaneseCalendar& JapaneseCalendar::operator= ( const JapaneseCalendar& right) @@ -332,10 +154,14 @@ int32_t JapaneseCalendar::getDefaultMonthInYear(int32_t eyear) int32_t month = 0; // Find out if we are at the edge of an era - - if(eyear == kEraInfo[era].year) { + int32_t eraStart[3] = { 0,0,0 }; + UErrorCode status = U_ZERO_ERROR; + gJapaneseEraRules->getStartDate(era, eraStart, status); + U_ASSERT(U_SUCCESS(status)); + if(eyear == eraStart[0]) { // Yes, we're in the first year of this era. - return kEraInfo[era].month-1; + return eraStart[1] // month + -1; // return 0-based month } return month; @@ -346,9 +172,13 @@ int32_t JapaneseCalendar::getDefaultDayInMonth(int32_t eyear, int32_t month) int32_t era = internalGetEra(); int32_t day = 1; - if(eyear == kEraInfo[era].year) { - if(month == (kEraInfo[era].month-1)) { - return kEraInfo[era].day; + int32_t eraStart[3] = { 0,0,0 }; + UErrorCode status = U_ZERO_ERROR; + gJapaneseEraRules->getStartDate(era, eraStart, status); + U_ASSERT(U_SUCCESS(status)); + if(eyear == eraStart[0]) { + if(month == eraStart[1] - 1) { + return eraStart[2]; } } @@ -358,7 +188,7 @@ int32_t JapaneseCalendar::getDefaultDayInMonth(int32_t eyear, int32_t month) int32_t JapaneseCalendar::internalGetEra() const { - return internalGet(UCAL_ERA, kCurrentEra); + return internalGet(UCAL_ERA, gCurrentEra); } int32_t JapaneseCalendar::handleGetExtendedYear() @@ -369,12 +199,18 @@ int32_t JapaneseCalendar::handleGetExtendedYear() if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR && newerField(UCAL_EXTENDED_YEAR, UCAL_ERA) == UCAL_EXTENDED_YEAR) { - year = internalGet(UCAL_EXTENDED_YEAR, kGregorianEpoch); - } else { - // Subtract one because year starts at 1 - year = internalGet(UCAL_YEAR) + kEraInfo[internalGetEra()].year - 1; - } - return year; + year = internalGet(UCAL_EXTENDED_YEAR, kGregorianEpoch); + } else { + UErrorCode status = U_ZERO_ERROR; + int32_t eraStartYear = gJapaneseEraRules->getStartYear(internalGet(UCAL_ERA, gCurrentEra), status); + U_ASSERT(U_SUCCESS(status)); + + // extended year is a gregorian year, where 1 = 1AD, 0 = 1BC, -1 = 2BC, etc + year = internalGet(UCAL_YEAR, 1) // pin to minimum of year 1 (first year) + + eraStartYear // add gregorian starting year + - 1; // Subtract one because year starts at 1 + } + return year; } @@ -383,79 +219,10 @@ void JapaneseCalendar::handleComputeFields(int32_t julianDay, UErrorCode& status //Calendar::timeToFields(theTime, quick, status); GregorianCalendar::handleComputeFields(julianDay, status); int32_t year = internalGet(UCAL_EXTENDED_YEAR); // Gregorian year + int32_t eraIdx = gJapaneseEraRules->getEraIndex(year, internalGet(UCAL_MONTH) + 1, internalGet(UCAL_DAY_OF_MONTH), status); - int32_t low = 0; - - // Short circuit for recent years. Most modern computations will - // occur in the current era and won't require the binary search. - // Note that if the year is == the current era year, then we use - // the binary search to handle the month/dom comparison. -#ifdef U_DEBUG_JCAL - fprintf(stderr, "== %d \n", year); -#endif - - if (year > kEraInfo[kCurrentEra].year) { - low = kCurrentEra; -#ifdef U_DEBUG_JCAL - fprintf(stderr, " low=%d (special)\n", low); -#endif - } else { - // Binary search - int32_t high = kEraCount; - -#ifdef U_DEBUG_JCAL - fprintf(stderr, " high=%d\n", high); -#endif - while (low < high - 1) { - int32_t i = (low + high) / 2; - int32_t diff = year - kEraInfo[i].year; - -#ifdef U_DEBUG_JCAL - fprintf(stderr, " d=%d low=%d, high=%d. Considering %d:M%d D%d Y%d. { we are ?:M%d D%d Y%d }\n", - diff,low, high, i, kEraInfo[i].month-1, kEraInfo[i].day, kEraInfo[i].year, internalGet(UCAL_MONTH), internalGet(UCAL_DATE),year); -#endif - - // If years are the same, then compare the months, and if those - // are the same, compare days of month. In the ERAS array - // months are 1-based for easier maintenance. - if (diff == 0) { - diff = internalGet(UCAL_MONTH) - (kEraInfo[i].month - 1); -#ifdef U_DEBUG_JCAL - fprintf(stderr, "diff now %d (M) = %d - %d - 1\n", diff, internalGet(UCAL_MONTH), kEraInfo[i].month); -#endif - if (diff == 0) { - diff = internalGet(UCAL_DATE) - kEraInfo[i].day; -#ifdef U_DEBUG_JCAL - fprintf(stderr, "diff now %d (D)\n", diff); -#endif - } - } - if (diff >= 0) { - low = i; - } else { - high = i; - } -#ifdef U_DEBUG_JCAL - fprintf(stderr, ". low=%d, high=%d, i=%d, diff=%d.. %d\n", low, high, i, diff, year); -#endif - - } - } - -#ifdef U_DEBUG_JCAL - fprintf(stderr, " low[era]=%d,.. %d\n", low, year); -#endif - // Now we've found the last era that starts before this date, so - // adjust the year to count from the start of that era. Note that - // all dates before the first era will fall into the first era by - // the algorithm. - - internalSet(UCAL_ERA, low); - internalSet(UCAL_YEAR, year - kEraInfo[low].year + 1); -#ifdef U_DEBUG_JCAL - fprintf(stderr, " Set ERA=%d, year=%d\n", low, year-kEraInfo[low].year+1); -#endif - + internalSet(UCAL_ERA, eraIdx); + internalSet(UCAL_YEAR, year - gJapaneseEraRules->getStartYear(eraIdx, status) + 1); } /* @@ -483,7 +250,7 @@ int32_t JapaneseCalendar::handleGetLimit(UCalendarDateFields field, ELimitType l if (limitType == UCAL_LIMIT_MINIMUM || limitType == UCAL_LIMIT_GREATEST_MINIMUM) { return 0; } - return kCurrentEra; + return gJapaneseEraRules->getNumberOfEras() - 1; // max known era, not gCurrentEra case UCAL_YEAR: { switch (limitType) { @@ -494,7 +261,12 @@ int32_t JapaneseCalendar::handleGetLimit(UCalendarDateFields field, ELimitType l return 1; case UCAL_LIMIT_COUNT: //added to avoid warning case UCAL_LIMIT_MAXIMUM: - return GregorianCalendar::handleGetLimit(UCAL_YEAR, UCAL_LIMIT_MAXIMUM) - kEraInfo[kCurrentEra].year; + { + UErrorCode status = U_ZERO_ERROR; + int32_t eraStartYear = gJapaneseEraRules->getStartYear(gCurrentEra, status); + U_ASSERT(U_SUCCESS(status)); + return GregorianCalendar::handleGetLimit(UCAL_YEAR, UCAL_LIMIT_MAXIMUM) - eraStartYear; + } default: return 1; // Error condition, invalid limitType } @@ -510,15 +282,18 @@ int32_t JapaneseCalendar::getActualMaximum(UCalendarDateFields field, UErrorCode if (U_FAILURE(status)) { return 0; // error case... any value } - if (era == kCurrentEra) { + if (era == gJapaneseEraRules->getNumberOfEras() - 1) { // // TODO: Investigate what value should be used here - revisit after 4.0. return handleGetLimit(UCAL_YEAR, UCAL_LIMIT_MAXIMUM); } else { - int32_t nextEraYear = kEraInfo[era + 1].year; - int32_t nextEraMonth = kEraInfo[era + 1].month; - int32_t nextEraDate = kEraInfo[era + 1].day; - - int32_t maxYear = nextEraYear - kEraInfo[era].year + 1; // 1-base + int32_t nextEraStart[3] = { 0,0,0 }; + gJapaneseEraRules->getStartDate(era + 1, nextEraStart, status); + int32_t nextEraYear = nextEraStart[0]; + int32_t nextEraMonth = nextEraStart[1]; // 1-base + int32_t nextEraDate = nextEraStart[2]; + + int32_t eraStartYear = gJapaneseEraRules->getStartYear(era, status); + int32_t maxYear = nextEraYear - eraStartYear + 1; // 1-base if (nextEraMonth == 1 && nextEraDate == 1) { // Subtract 1, because the next era starts at Jan 1 maxYear--;