#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
-
+#if U_PLATFORM_HAS_WINUWP_API == 0
+#include <stdlib.h> // 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 <windows.h>
+#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 <stdio.h>
-#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<int32_t>(uprv_strlen(TENTATIVE_ERA_VAR_NAME)));
+ WCHAR varValue[5] = {};
+ DWORD ret = GetEnvironmentVariableW(reinterpret_cast<WCHAR*>(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.
}
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)
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;
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];
}
}
int32_t JapaneseCalendar::internalGetEra() const
{
- return internalGet(UCAL_ERA, kCurrentEra);
+ return internalGet(UCAL_ERA, gCurrentEra);
}
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;
}
//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);
}
/*
if (limitType == UCAL_LIMIT_MINIMUM || limitType == UCAL_LIMIT_GREATEST_MINIMUM) {
return 0;
}
- return kCurrentEra;
+ return gJapaneseEraRules->getNumberOfEras() - 1; // <rdar://problem/49714633> max known era, not gCurrentEra
case UCAL_YEAR:
{
switch (limitType) {
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
}
if (U_FAILURE(status)) {
return 0; // error case... any value
}
- if (era == kCurrentEra) {
+ if (era == gJapaneseEraRules->getNumberOfEras() - 1) { // <rdar://problem/49714633>
// 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--;
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