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icu46/source/i18n/japancal.cpp

Index: icu46/source/i18n/japancal.cpp
===================================================================
--- icu46/source/i18n/japancal.cpp	(revision 0)
+++ icu46/source/i18n/japancal.cpp	(revision 0)
@@ -0,0 +1,531 @@
+/*
+*******************************************************************************
+* Copyright (C) 2003-2009, 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 "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 (sizeof(kEraInfo)/sizeof(kEraInfo[0]))
+
+/**
+ * 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 1;
+        }
+        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
Property changes on: icu46/source/i18n/japancal.cpp
___________________________________________________________________
Added: svn:eol-style
   + LF