[apple/icu.git] / icuSources / i18n / japancal.cpp

// © 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
Commit	Line	Data
f3c0d7a5 A	1	// © 2016 and later: Unicode, Inc. and others.
f3c0d7a5 A	2	// License & terms of use: http://www.unicode.org/copyright.html
b75a7d8f A	3	/*
b75a7d8f A	4	*******************************************************************************
2ca993e8 A	5	* Copyright (C) 2003-2009,2012,2016 International Business Machines Corporation and
2ca993e8 A	6	* others. All Rights Reserved.
b75a7d8f A	7	*******************************************************************************
	8	*
	9	* File JAPANCAL.CPP
	10	*
	11	* Modification History:
	12	* 05/16/2003 srl copied from buddhcal.cpp
	13	*
	14	*/
	15
	16	#include "unicode/utypes.h"
	17
	18	#if !UCONFIG_NO_FORMATTING
	19
2ca993e8	20	#include "cmemory.h"
b75a7d8f A	21	#include "japancal.h"
b75a7d8f A	22	#include "unicode/gregocal.h"
46f4442e	23	#include "umutex.h"
374ca955	24	#include "uassert.h"
b75a7d8f A	25
	26	//#define U_DEBUG_JCAL
	27
	28	#ifdef U_DEBUG_JCAL
	29	#include <stdio.h>
	30	#endif
	31
	32	U_NAMESPACE_BEGIN
	33
374ca955	34	UOBJECT_DEFINE_RTTI_IMPLEMENTATION(JapaneseCalendar)
b75a7d8f A	35
	36	// Gregorian date of each emperor's ascension
	37	// Years are AD, months are 1-based.
	38	static const struct {
46f4442e A	39	int16_t year;
	40	int8_t month;
	41	int8_t day;
b75a7d8f	42	} kEraInfo[] = {
46f4442e A	43	// Year Month Day
	44	{ 645, 6, 19 }, // Taika 0
	45	{ 650, 2, 15 }, // Hakuchi 1
	46	{ 672, 1, 1 }, // Hakuho 2
	47	{ 686, 7, 20 }, // Shucho 3
	48	{ 701, 3, 21 }, // Taiho 4
	49	{ 704, 5, 10 }, // Keiun 5
	50	{ 708, 1, 11 }, // Wado 6
	51	{ 715, 9, 2 }, // Reiki 7
	52	{ 717, 11, 17 }, // Yoro 8
	53	{ 724, 2, 4 }, // Jinki 9
	54	{ 729, 8, 5 }, // Tempyo 10
	55	{ 749, 4, 14 }, // Tempyo-kampo 11
	56	{ 749, 7, 2 }, // Tempyo-shoho 12
	57	{ 757, 8, 18 }, // Tempyo-hoji 13
	58	{ 765, 1, 7 }, // Tempho-jingo 14
	59	{ 767, 8, 16 }, // Jingo-keiun 15
	60	{ 770, 10, 1 }, // Hoki 16
	61	{ 781, 1, 1 }, // Ten-o 17
	62	{ 782, 8, 19 }, // Enryaku 18
	63	{ 806, 5, 18 }, // Daido 19
	64	{ 810, 9, 19 }, // Konin 20
	65	{ 824, 1, 5 }, // Tencho
	66	{ 834, 1, 3 }, // Showa
	67	{ 848, 6, 13 }, // Kajo
	68	{ 851, 4, 28 }, // Ninju
	69	{ 854, 11, 30 }, // Saiko
	70	{ 857, 2, 21 }, // Tennan
	71	{ 859, 4, 15 }, // Jogan
	72	{ 877, 4, 16 }, // Genkei
	73	{ 885, 2, 21 }, // Ninna
	74	{ 889, 4, 27 }, // Kampyo 30
	75	{ 898, 4, 26 }, // Shotai
	76	{ 901, 7, 15 }, // Engi
	77	{ 923, 4, 11 }, // Encho
	78	{ 931, 4, 26 }, // Shohei
	79	{ 938, 5, 22 }, // Tengyo
	80	{ 947, 4, 22 }, // Tenryaku
	81	{ 957, 10, 27 }, // Tentoku
	82	{ 961, 2, 16 }, // Owa
	83	{ 964, 7, 10 }, // Koho
	84	{ 968, 8, 13 }, // Anna 40
	85	{ 970, 3, 25 }, // Tenroku
	86	{ 973, 12, 20 }, // Ten-en
	87	{ 976, 7, 13 }, // Jogen
	88	{ 978, 11, 29 }, // Tengen
	89	{ 983, 4, 15 }, // Eikan
	90	{ 985, 4, 27 }, // Kanna
	91	{ 987, 4, 5 }, // Ei-en
	92	{ 989, 8, 8 }, // Eiso
	93	{ 990, 11, 7 }, // Shoryaku
	94	{ 995, 2, 22 }, // Chotoku 50
	95	{ 999, 1, 13 }, // Choho
	96	{ 1004, 7, 20 }, // Kanko
	97	{ 1012, 12, 25 }, // Chowa
	98	{ 1017, 4, 23 }, // Kannin
	99	{ 1021, 2, 2 }, // Jian
	100	{ 1024, 7, 13 }, // Manju
	101	{ 1028, 7, 25 }, // Chogen
	102	{ 1037, 4, 21 }, // Choryaku
	103	{ 1040, 11, 10 }, // Chokyu
	104	{ 1044, 11, 24 }, // Kantoku 60
	105	{ 1046, 4, 14 }, // Eisho
	106	{ 1053, 1, 11 }, // Tengi
107	{ 1058, 8, 29 }, // Kohei
108	{ 1065, 8, 2 }, // Jiryaku
109	{ 1069, 4, 13 }, // Enkyu
110	{ 1074, 8, 23 }, // Shoho
111	{ 1077, 11, 17 }, // Shoryaku
112	{ 1081, 2, 10 }, // Eiho
113	{ 1084, 2, 7 }, // Otoku
114	{ 1087, 4, 7 }, // Kanji 70
115	{ 1094, 12, 15 }, // Kaho
116	{ 1096, 12, 17 }, // Eicho
117	{ 1097, 11, 21 }, // Shotoku
118	{ 1099, 8, 28 }, // Kowa
119	{ 1104, 2, 10 }, // Choji
120	{ 1106, 4, 9 }, // Kasho
121	{ 1108, 8, 3 }, // Tennin
122	{ 1110, 7, 13 }, // Ten-ei
123	{ 1113, 7, 13 }, // Eikyu
124	{ 1118, 4, 3 }, // Gen-ei 80
125	{ 1120, 4, 10 }, // Hoan
126	{ 1124, 4, 3 }, // Tenji
127	{ 1126, 1, 22 }, // Daiji
128	{ 1131, 1, 29 }, // Tensho
129	{ 1132, 8, 11 }, // Chosho
130	{ 1135, 4, 27 }, // Hoen
131	{ 1141, 7, 10 }, // Eiji
132	{ 1142, 4, 28 }, // Koji
133	{ 1144, 2, 23 }, // Tenyo
134	{ 1145, 7, 22 }, // Kyuan 90
135	{ 1151, 1, 26 }, // Ninpei
136	{ 1154, 10, 28 }, // Kyuju
137	{ 1156, 4, 27 }, // Hogen
138	{ 1159, 4, 20 }, // Heiji
139	{ 1160, 1, 10 }, // Eiryaku
140	{ 1161, 9, 4 }, // Oho
141	{ 1163, 3, 29 }, // Chokan
142	{ 1165, 6, 5 }, // Eiman
143	{ 1166, 8, 27 }, // Nin-an
144	{ 1169, 4, 8 }, // Kao 100
145	{ 1171, 4, 21 }, // Shoan
146	{ 1175, 7, 28 }, // Angen
147	{ 1177, 8, 4 }, // Jisho
148	{ 1181, 7, 14 }, // Yowa
149	{ 1182, 5, 27 }, // Juei
150	{ 1184, 4, 16 }, // Genryuku
151	{ 1185, 8, 14 }, // Bunji
152	{ 1190, 4, 11 }, // Kenkyu
153	{ 1199, 4, 27 }, // Shoji
154	{ 1201, 2, 13 }, // Kennin 110
155	{ 1204, 2, 20 }, // Genkyu
156	{ 1206, 4, 27 }, // Ken-ei
157	{ 1207, 10, 25 }, // Shogen
158	{ 1211, 3, 9 }, // Kenryaku
159	{ 1213, 12, 6 }, // Kenpo
160	{ 1219, 4, 12 }, // Shokyu
161	{ 1222, 4, 13 }, // Joo
162	{ 1224, 11, 20 }, // Gennin
163	{ 1225, 4, 20 }, // Karoku
164	{ 1227, 12, 10 }, // Antei 120
165	{ 1229, 3, 5 }, // Kanki
166	{ 1232, 4, 2 }, // Joei
167	{ 1233, 4, 15 }, // Tempuku
168	{ 1234, 11, 5 }, // Bunryaku
169	{ 1235, 9, 19 }, // Katei
170	{ 1238, 11, 23 }, // Ryakunin
171	{ 1239, 2, 7 }, // En-o
172	{ 1240, 7, 16 }, // Ninji
173	{ 1243, 2, 26 }, // Kangen
174	{ 1247, 2, 28 }, // Hoji 130
175	{ 1249, 3, 18 }, // Kencho
176	{ 1256, 10, 5 }, // Kogen
177	{ 1257, 3, 14 }, // Shoka
178	{ 1259, 3, 26 }, // Shogen
179	{ 1260, 4, 13 }, // Bun-o
180	{ 1261, 2, 20 }, // Kocho
181	{ 1264, 2, 28 }, // Bun-ei
182	{ 1275, 4, 25 }, // Kenji
183	{ 1278, 2, 29 }, // Koan
184	{ 1288, 4, 28 }, // Shoo 140
185	{ 1293, 8, 55 }, // Einin
186	{ 1299, 4, 25 }, // Shoan
187	{ 1302, 11, 21 }, // Kengen
188	{ 1303, 8, 5 }, // Kagen
189	{ 1306, 12, 14 }, // Tokuji
190	{ 1308, 10, 9 }, // Enkei
191	{ 1311, 4, 28 }, // Ocho
192	{ 1312, 3, 20 }, // Showa
193	{ 1317, 2, 3 }, // Bunpo
194	{ 1319, 4, 28 }, // Geno 150
195	{ 1321, 2, 23 }, // Genkyo
196	{ 1324, 12, 9 }, // Shochu
197	{ 1326, 4, 26 }, // Kareki
198	{ 1329, 8, 29 }, // Gentoku
199	{ 1331, 8, 9 }, // Genko
200	{ 1334, 1, 29 }, // Kemmu
201	{ 1336, 2, 29 }, // Engen
202	{ 1340, 4, 28 }, // Kokoku
203	{ 1346, 12, 8 }, // Shohei
204	{ 1370, 7, 24 }, // Kentoku 160
205	{ 1372, 4, 1 }, // Bunch\u0169
206	{ 1375, 5, 27 }, // Tenju
207	{ 1379, 3, 22 }, // Koryaku
208	{ 1381, 2, 10 }, // Kowa
209	{ 1384, 4, 28 }, // Gench\u0169
210	{ 1384, 2, 27 }, // Meitoku
211	{ 1387, 8, 23 }, // Kakei
212	{ 1389, 2, 9 }, // Koo
213	{ 1390, 3, 26 }, // Meitoku
214	{ 1394, 7, 5 }, // Oei 170
215	{ 1428, 4, 27 }, // Shocho
216	{ 1429, 9, 5 }, // Eikyo
217	{ 1441, 2, 17 }, // Kakitsu
218	{ 1444, 2, 5 }, // Bun-an
219	{ 1449, 7, 28 }, // Hotoku
220	{ 1452, 7, 25 }, // Kyotoku
221	{ 1455, 7, 25 }, // Kosho
222	{ 1457, 9, 28 }, // Choroku
223	{ 1460, 12, 21 }, // Kansho
224	{ 1466, 2, 28 }, // Bunsho 180
225	{ 1467, 3, 3 }, // Onin
226	{ 1469, 4, 28 }, // Bunmei
227	{ 1487, 7, 29 }, // Chokyo
228	{ 1489, 8, 21 }, // Entoku
229	{ 1492, 7, 19 }, // Meio
230	{ 1501, 2, 29 }, // Bunki
231	{ 1504, 2, 30 }, // Eisho
232	{ 1521, 8, 23 }, // Taiei
233	{ 1528, 8, 20 }, // Kyoroku
234	{ 1532, 7, 29 }, // Tenmon 190
235	{ 1555, 10, 23 }, // Koji
236	{ 1558, 2, 28 }, // Eiroku
237	{ 1570, 4, 23 }, // Genki
238	{ 1573, 7, 28 }, // Tensho
239	{ 1592, 12, 8 }, // Bunroku
240	{ 1596, 10, 27 }, // Keicho
241	{ 1615, 7, 13 }, // Genwa
242	{ 1624, 2, 30 }, // Kan-ei
243	{ 1644, 12, 16 }, // Shoho
244	{ 1648, 2, 15 }, // Keian 200
245	{ 1652, 9, 18 }, // Shoo
246	{ 1655, 4, 13 }, // Meiryaku
247	{ 1658, 7, 23 }, // Manji
248	{ 1661, 4, 25 }, // Kanbun
249	{ 1673, 9, 21 }, // Enpo
250	{ 1681, 9, 29 }, // Tenwa
251	{ 1684, 2, 21 }, // Jokyo
252	{ 1688, 9, 30 }, // Genroku
253	{ 1704, 3, 13 }, // Hoei
254	{ 1711, 4, 25 }, // Shotoku 210
255	{ 1716, 6, 22 }, // Kyoho
256	{ 1736, 4, 28 }, // Genbun
257	{ 1741, 2, 27 }, // Kanpo
258	{ 1744, 2, 21 }, // Enkyo
259	{ 1748, 7, 12 }, // Kan-en
260	{ 1751, 10, 27 }, // Horyaku
261	{ 1764, 6, 2 }, // Meiwa
262	{ 1772, 11, 16 }, // An-ei
263	{ 1781, 4, 2 }, // Tenmei
264	{ 1789, 1, 25 }, // Kansei 220
265	{ 1801, 2, 5 }, // Kyowa
266	{ 1804, 2, 11 }, // Bunka
267	{ 1818, 4, 22 }, // Bunsei
268	{ 1830, 12, 10 }, // Tenpo
269	{ 1844, 12, 2 }, // Koka
270	{ 1848, 2, 28 }, // Kaei
271	{ 1854, 11, 27 }, // Ansei
272	{ 1860, 3, 18 }, // Man-en
273	{ 1861, 2, 19 }, // Bunkyu
274	{ 1864, 2, 20 }, // Genji 230
275	{ 1865, 4, 7 }, // Keio 231
276	{ 1868, 9, 8 }, // Meiji 232
277	{ 1912, 7, 30 }, // Taisho 233
278	{ 1926, 12, 25 }, // Showa 234
279	{ 1989, 1, 8 } // Heisei 235
280	};
b75a7d8f	281
2ca993e8	282	#define kEraCount UPRV_LENGTHOF(kEraInfo)
b75a7d8f	283
729e4ab9 A	284	/**
	285	* The current era, for reference.
	286	*/
	287	static const int32_t kCurrentEra = (kEraCount-1); // int32_t to match the calendar field type
46f4442e A	288
	289	static const int32_t kGregorianEpoch = 1970; // used as the default value of EXTENDED_YEAR
	290
	291	/* Some platforms don't like to export constants, like old Palm OS and some z/OS configurations. */
	292	uint32_t JapaneseCalendar::getCurrentEra() {
	293	return kCurrentEra;
	294	}
b75a7d8f A	295
b75a7d8f A	296	JapaneseCalendar::JapaneseCalendar(const Locale& aLocale, UErrorCode& success)
46f4442e	297	: GregorianCalendar(aLocale, success)
b75a7d8f A	298	{
	299	setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
	300	}
	301
	302	JapaneseCalendar::~JapaneseCalendar()
	303	{
	304	}
	305
	306	JapaneseCalendar::JapaneseCalendar(const JapaneseCalendar& source)
46f4442e	307	: GregorianCalendar(source)
b75a7d8f A	308	{
	309	}
	310
	311	JapaneseCalendar& JapaneseCalendar::operator= ( const JapaneseCalendar& right)
	312	{
46f4442e A	313	GregorianCalendar::operator=(right);
46f4442e A	314	return *this;
b75a7d8f A	315	}
	316
	317	Calendar* JapaneseCalendar::clone(void) const
	318	{
46f4442e	319	return new JapaneseCalendar(*this);
b75a7d8f A	320	}
	321
	322	const char *JapaneseCalendar::getType() const
	323	{
46f4442e	324	return "japanese";
b75a7d8f A	325	}
b75a7d8f A	326
729e4ab9	327	int32_t JapaneseCalendar::getDefaultMonthInYear(int32_t eyear)
b75a7d8f	328	{
46f4442e	329	int32_t era = internalGetEra();
46f4442e	330	// TODO do we assume we can trust 'era'? What if it is denormalized?
b75a7d8f	331
729e4ab9	332	int32_t month = 0;
b75a7d8f	333
46f4442e	334	// Find out if we are at the edge of an era
b75a7d8f	335
729e4ab9	336	if(eyear == kEraInfo[era].year) {
46f4442e A	337	// Yes, we're in the first year of this era.
	338	return kEraInfo[era].month-1;
	339	}
b75a7d8f	340
46f4442e	341	return month;
b75a7d8f A	342	}
b75a7d8f A	343
729e4ab9	344	int32_t JapaneseCalendar::getDefaultDayInMonth(int32_t eyear, int32_t month)
b75a7d8f	345	{
46f4442e	346	int32_t era = internalGetEra();
729e4ab9	347	int32_t day = 1;
46f4442e	348
729e4ab9	349	if(eyear == kEraInfo[era].year) {
46f4442e A	350	if(month == (kEraInfo[era].month-1)) {
	351	return kEraInfo[era].day;
	352	}
b75a7d8f	353	}
b75a7d8f	354
46f4442e	355	return day;
b75a7d8f A	356	}
	357
	358
	359	int32_t JapaneseCalendar::internalGetEra() const
	360	{
46f4442e	361	return internalGet(UCAL_ERA, kCurrentEra);
b75a7d8f A	362	}
b75a7d8f A	363
374ca955	364	int32_t JapaneseCalendar::handleGetExtendedYear()
b75a7d8f	365	{
46f4442e A	366	// EXTENDED_YEAR in JapaneseCalendar is a Gregorian year
	367	// The default value of EXTENDED_YEAR is 1970 (Showa 45)
	368	int32_t year;
	369
	370	if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR &&
	371	newerField(UCAL_EXTENDED_YEAR, UCAL_ERA) == UCAL_EXTENDED_YEAR) {
	372	year = internalGet(UCAL_EXTENDED_YEAR, kGregorianEpoch);
	373	} else {
	374	// Subtract one because year starts at 1
	375	year = internalGet(UCAL_YEAR) + kEraInfo[internalGetEra()].year - 1;
	376	}
	377	return year;
b75a7d8f A	378	}
b75a7d8f A	379
374ca955 A	380
374ca955 A	381	void JapaneseCalendar::handleComputeFields(int32_t julianDay, UErrorCode& status)
b75a7d8f	382	{
46f4442e A	383	//Calendar::timeToFields(theTime, quick, status);
	384	GregorianCalendar::handleComputeFields(julianDay, status);
	385	int32_t year = internalGet(UCAL_EXTENDED_YEAR); // Gregorian year
	386
	387	int32_t low = 0;
	388
	389	// Short circuit for recent years. Most modern computations will
	390	// occur in the current era and won't require the binary search.
	391	// Note that if the year is == the current era year, then we use
	392	// the binary search to handle the month/dom comparison.
b75a7d8f	393	#ifdef U_DEBUG_JCAL
46f4442e	394	fprintf(stderr, "== %d \n", year);
b75a7d8f	395	#endif
46f4442e A	396
	397	if (year > kEraInfo[kCurrentEra].year) {
	398	low = kCurrentEra;
b75a7d8f	399	#ifdef U_DEBUG_JCAL
46f4442e	400	fprintf(stderr, " low=%d (special)\n", low);
b75a7d8f	401	#endif
46f4442e A	402	} else {
	403	// Binary search
	404	int32_t high = kEraCount;
	405
b75a7d8f	406	#ifdef U_DEBUG_JCAL
46f4442e	407	fprintf(stderr, " high=%d\n", high);
b75a7d8f	408	#endif
46f4442e A	409	while (low < high - 1) {
	410	int32_t i = (low + high) / 2;
	411	int32_t diff = year - kEraInfo[i].year;
b75a7d8f A	412
b75a7d8f A	413	#ifdef U_DEBUG_JCAL
46f4442e A	414	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",
46f4442e A	415	diff,low, high, i, kEraInfo[i].month-1, kEraInfo[i].day, kEraInfo[i].year, internalGet(UCAL_MONTH), internalGet(UCAL_DATE),year);
b75a7d8f	416	#endif
46f4442e A	417
	418	// If years are the same, then compare the months, and if those
	419	// are the same, compare days of month. In the ERAS array
	420	// months are 1-based for easier maintenance.
	421	if (diff == 0) {
	422	diff = internalGet(UCAL_MONTH) - (kEraInfo[i].month - 1);
b75a7d8f	423	#ifdef U_DEBUG_JCAL
46f4442e	424	fprintf(stderr, "diff now %d (M) = %d - %d - 1\n", diff, internalGet(UCAL_MONTH), kEraInfo[i].month);
b75a7d8f	425	#endif
46f4442e A	426	if (diff == 0) {
46f4442e A	427	diff = internalGet(UCAL_DATE) - kEraInfo[i].day;
b75a7d8f	428	#ifdef U_DEBUG_JCAL
46f4442e	429	fprintf(stderr, "diff now %d (D)\n", diff);
b75a7d8f	430	#endif
46f4442e A	431	}
	432	}
	433	if (diff >= 0) {
	434	low = i;
	435	} else {
	436	high = i;
	437	}
b75a7d8f	438	#ifdef U_DEBUG_JCAL
46f4442e	439	fprintf(stderr, ". low=%d, high=%d, i=%d, diff=%d.. %d\n", low, high, i, diff, year);
b75a7d8f A	440	#endif
b75a7d8f A	441
46f4442e	442	}
b75a7d8f	443	}
b75a7d8f A	444
b75a7d8f A	445	#ifdef U_DEBUG_JCAL
46f4442e	446	fprintf(stderr, " low[era]=%d,.. %d\n", low, year);
b75a7d8f	447	#endif
46f4442e A	448	// Now we've found the last era that starts before this date, so
	449	// adjust the year to count from the start of that era. Note that
	450	// all dates before the first era will fall into the first era by
	451	// the algorithm.
	452
	453	internalSet(UCAL_ERA, low);
	454	internalSet(UCAL_YEAR, year - kEraInfo[low].year + 1);
b75a7d8f	455	#ifdef U_DEBUG_JCAL
46f4442e	456	fprintf(stderr, " Set ERA=%d, year=%d\n", low, year-kEraInfo[low].year+1);
b75a7d8f A	457	#endif
	458
	459	}
	460
	461	/*
46f4442e	462	Disable pivoting
b75a7d8f A	463	*/
	464	UBool JapaneseCalendar::haveDefaultCentury() const
	465	{
46f4442e	466	return FALSE;
b75a7d8f A	467	}
	468
	469	UDate JapaneseCalendar::defaultCenturyStart() const
	470	{
46f4442e	471	return 0;// WRONG
b75a7d8f A	472	}
	473
	474	int32_t JapaneseCalendar::defaultCenturyStartYear() const
	475	{
46f4442e	476	return 0;
b75a7d8f A	477	}
b75a7d8f A	478
374ca955 A	479	int32_t JapaneseCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
374ca955 A	480	{
46f4442e A	481	switch(field) {
	482	case UCAL_ERA:
	483	if (limitType == UCAL_LIMIT_MINIMUM \|\| limitType == UCAL_LIMIT_GREATEST_MINIMUM) {
51004dcb	484	return 0;
374ca955	485	}
46f4442e A	486	return kCurrentEra;
	487	case UCAL_YEAR:
	488	{
	489	switch (limitType) {
	490	case UCAL_LIMIT_MINIMUM:
	491	case UCAL_LIMIT_GREATEST_MINIMUM:
	492	return 1;
	493	case UCAL_LIMIT_LEAST_MAXIMUM:
	494	return 1;
	495	case UCAL_LIMIT_COUNT: //added to avoid warning
	496	case UCAL_LIMIT_MAXIMUM:
	497	return GregorianCalendar::handleGetLimit(UCAL_YEAR, UCAL_LIMIT_MAXIMUM) - kEraInfo[kCurrentEra].year;
729e4ab9 A	498	default:
729e4ab9 A	499	return 1; // Error condition, invalid limitType
46f4442e	500	}
374ca955	501	}
374ca955	502	default:
46f4442e	503	return GregorianCalendar::handleGetLimit(field,limitType);
374ca955	504	}
374ca955	505	}
b75a7d8f	506
46f4442e A	507	int32_t JapaneseCalendar::getActualMaximum(UCalendarDateFields field, UErrorCode& status) const {
	508	if (field == UCAL_YEAR) {
	509	int32_t era = get(UCAL_ERA, status);
	510	if (U_FAILURE(status)) {
	511	return 0; // error case... any value
	512	}
	513	if (era == kCurrentEra) {
	514	// TODO: Investigate what value should be used here - revisit after 4.0.
	515	return handleGetLimit(UCAL_YEAR, UCAL_LIMIT_MAXIMUM);
	516	} else {
	517	int32_t nextEraYear = kEraInfo[era + 1].year;
	518	int32_t nextEraMonth = kEraInfo[era + 1].month;
	519	int32_t nextEraDate = kEraInfo[era + 1].day;
	520
	521	int32_t maxYear = nextEraYear - kEraInfo[era].year + 1; // 1-base
	522	if (nextEraMonth == 1 && nextEraDate == 1) {
	523	// Subtract 1, because the next era starts at Jan 1
	524	maxYear--;
	525	}
	526	return maxYear;
	527	}
	528	}
	529	return GregorianCalendar::getActualMaximum(field, status);
	530	}
b75a7d8f A	531
	532	U_NAMESPACE_END
	533
	534	#endif