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+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+* Copyright (C) 2003-2009,2012,2016 International Business Machines Corporation and
+* others. All Rights Reserved.
+*******************************************************************************
+*
+* File JAPANCAL.CPP
+*
+* Modification History:
+* 05/16/2003 srl copied from buddhcal.cpp
+*
+*/
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "cmemory.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
+
+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
+
+/* Some platforms don't like to export constants, like old Palm OS and some z/OS configurations. */
+uint32_t JapaneseCalendar::getCurrentEra() {
+ return kCurrentEra;
+}
+
+JapaneseCalendar::JapaneseCalendar(const Locale& aLocale, UErrorCode& success)
+: GregorianCalendar(aLocale, success)
+{
+ setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
+}
+
+JapaneseCalendar::~JapaneseCalendar()
+{
+}
+
+JapaneseCalendar::JapaneseCalendar(const JapaneseCalendar& source)
+: GregorianCalendar(source)
+{
+}
+
+JapaneseCalendar& JapaneseCalendar::operator= ( const JapaneseCalendar& right)
+{
+ GregorianCalendar::operator=(right);
+ return *this;
+}
+
+Calendar* JapaneseCalendar::clone(void) const
+{
+ return new JapaneseCalendar(*this);
+}
+
+const char *JapaneseCalendar::getType() const
+{
+ return "japanese";
+}
+
+int32_t JapaneseCalendar::getDefaultMonthInYear(int32_t eyear)
+{
+ int32_t era = internalGetEra();
+ // TODO do we assume we can trust 'era'? What if it is denormalized?
+
+ int32_t month = 0;
+
+ // Find out if we are at the edge of an era
+
+ if(eyear == kEraInfo[era].year) {
+ // Yes, we're in the first year of this era.
+ return kEraInfo[era].month-1;
+ }
+
+ return month;
+}
+
+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;
+ }
+ }
+
+ return day;
+}
+
+
+int32_t JapaneseCalendar::internalGetEra() const
+{
+ return internalGet(UCAL_ERA, kCurrentEra);
+}
+
+int32_t JapaneseCalendar::handleGetExtendedYear()
+{
+ // EXTENDED_YEAR in JapaneseCalendar is a Gregorian year
+ // The default value of EXTENDED_YEAR is 1970 (Showa 45)
+ int32_t year;
+
+ 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;
+}
+
+
+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 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
+
+}
+
+/*
+Disable pivoting
+*/
+UBool JapaneseCalendar::haveDefaultCentury() const
+{
+ return FALSE;
+}
+
+UDate JapaneseCalendar::defaultCenturyStart() const
+{
+ return 0;// WRONG
+}
+
+int32_t JapaneseCalendar::defaultCenturyStartYear() const
+{
+ return 0;
+}
+
+int32_t JapaneseCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
+{
+ switch(field) {
+ case UCAL_ERA:
+ if (limitType == UCAL_LIMIT_MINIMUM || limitType == UCAL_LIMIT_GREATEST_MINIMUM) {
+ return 0;
+ }
+ return kCurrentEra;
+ case UCAL_YEAR:
+ {
+ switch (limitType) {
+ case UCAL_LIMIT_MINIMUM:
+ case UCAL_LIMIT_GREATEST_MINIMUM:
+ return 1;
+ case UCAL_LIMIT_LEAST_MAXIMUM:
+ 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;
+ default:
+ return 1; // Error condition, invalid limitType
+ }
+ }
+ default:
+ return GregorianCalendar::handleGetLimit(field,limitType);
+ }
+}
+
+int32_t JapaneseCalendar::getActualMaximum(UCalendarDateFields field, UErrorCode& status) const {
+ if (field == UCAL_YEAR) {
+ int32_t era = get(UCAL_ERA, status);
+ if (U_FAILURE(status)) {
+ return 0; // error case... any value
+ }
+ if (era == kCurrentEra) {
+ // 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
+ if (nextEraMonth == 1 && nextEraDate == 1) {
+ // Subtract 1, because the next era starts at Jan 1
+ maxYear--;
+ }
+ return maxYear;
+ }
+ }
+ return GregorianCalendar::getActualMaximum(field, status);
+}
+
+U_NAMESPACE_END
+
+#endif
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