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comparison: intl/icu/source/i18n/dangical.cpp
intl/icu/source/i18n/dangical.cpp
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| -1:000000000000 | 0:bba2862bd275 |
|---|---|
| 1 /* | |
| 2 ****************************************************************************** | |
| 3 * Copyright (C) 2013, International Business Machines Corporation | |
| 4 * and others. All Rights Reserved. | |
| 5 ****************************************************************************** | |
| 6 * | |
| 7 * File DANGICAL.CPP | |
| 8 ***************************************************************************** | |
| 9 */ | |
| 10 | |
| 11 #include "chnsecal.h" | |
| 12 #include "dangical.h" | |
| 13 | |
| 14 #if !UCONFIG_NO_FORMATTING | |
| 15 | |
| 16 #include "gregoimp.h" // Math | |
| 17 #include "uassert.h" | |
| 18 #include "ucln_in.h" | |
| 19 #include "umutex.h" | |
| 20 #include "unicode/rbtz.h" | |
| 21 #include "unicode/tzrule.h" | |
| 22 | |
| 23 // --- The cache -- | |
| 24 static icu::TimeZone *gDangiCalendarZoneAstroCalc = NULL; | |
| 25 static icu::UInitOnce gDangiCalendarInitOnce = U_INITONCE_INITIALIZER; | |
| 26 | |
| 27 /** | |
| 28 * The start year of the Korean traditional calendar (Dan-gi) is the inaugural | |
| 29 * year of Dan-gun (BC 2333). | |
| 30 */ | |
| 31 static const int32_t DANGI_EPOCH_YEAR = -2332; // Gregorian year | |
| 32 | |
| 33 U_CDECL_BEGIN | |
| 34 static UBool calendar_dangi_cleanup(void) { | |
| 35 if (gDangiCalendarZoneAstroCalc) { | |
| 36 delete gDangiCalendarZoneAstroCalc; | |
| 37 gDangiCalendarZoneAstroCalc = NULL; | |
| 38 } | |
| 39 gDangiCalendarInitOnce.reset(); | |
| 40 return TRUE; | |
| 41 } | |
| 42 U_CDECL_END | |
| 43 | |
| 44 U_NAMESPACE_BEGIN | |
| 45 | |
| 46 // Implementation of the DangiCalendar class | |
| 47 | |
| 48 //------------------------------------------------------------------------- | |
| 49 // Constructors... | |
| 50 //------------------------------------------------------------------------- | |
| 51 | |
| 52 DangiCalendar::DangiCalendar(const Locale& aLocale, UErrorCode& success) | |
| 53 : ChineseCalendar(aLocale, DANGI_EPOCH_YEAR, getDangiCalZoneAstroCalc(), success) | |
| 54 { | |
| 55 } | |
| 56 | |
| 57 DangiCalendar::DangiCalendar (const DangiCalendar& other) | |
| 58 : ChineseCalendar(other) | |
| 59 { | |
| 60 } | |
| 61 | |
| 62 DangiCalendar::~DangiCalendar() | |
| 63 { | |
| 64 } | |
| 65 | |
| 66 Calendar* | |
| 67 DangiCalendar::clone() const | |
| 68 { | |
| 69 return new DangiCalendar(*this); | |
| 70 } | |
| 71 | |
| 72 const char *DangiCalendar::getType() const { | |
| 73 return "dangi"; | |
| 74 } | |
| 75 | |
| 76 /** | |
| 77 * The time zone used for performing astronomical computations for | |
| 78 * Dangi calendar. In Korea various timezones have been used historically | |
| 79 * (cf. http://www.math.snu.ac.kr/~kye/others/lunar.html): | |
| 80 * | |
| 81 * - 1908/04/01: GMT+8 | |
| 82 * 1908/04/01 - 1911/12/31: GMT+8.5 | |
| 83 * 1912/01/01 - 1954/03/20: GMT+9 | |
| 84 * 1954/03/21 - 1961/08/09: GMT+8.5 | |
| 85 * 1961/08/10 - : GMT+9 | |
| 86 * | |
| 87 * Note that, in 1908-1911, the government did not apply the timezone change | |
| 88 * but used GMT+8. In addition, 1954-1961's timezone change does not affect | |
| 89 * the lunar date calculation. Therefore, the following simpler rule works: | |
| 90 * | |
| 91 * -1911: GMT+8 | |
| 92 * 1912-: GMT+9 | |
| 93 * | |
| 94 * Unfortunately, our astronomer's approximation doesn't agree with the | |
| 95 * references (http://www.math.snu.ac.kr/~kye/others/lunar.html and | |
| 96 * http://astro.kasi.re.kr/Life/ConvertSolarLunarForm.aspx?MenuID=115) | |
| 97 * in 1897/7/30. So the following ad hoc fix is used here: | |
| 98 * | |
| 99 * -1896: GMT+8 | |
| 100 * 1897: GMT+7 | |
| 101 * 1898-1911: GMT+8 | |
| 102 * 1912- : GMT+9 | |
| 103 */ | |
| 104 static void U_CALLCONV initDangiCalZoneAstroCalc(void) { | |
| 105 U_ASSERT(gDangiCalendarZoneAstroCalc == NULL); | |
| 106 const UDate millis1897[] = { (UDate)((1897 - 1970) * 365 * kOneDay) }; // some days of error is not a problem here | |
| 107 const UDate millis1898[] = { (UDate)((1898 - 1970) * 365 * kOneDay) }; // some days of error is not a problem here | |
| 108 const UDate millis1912[] = { (UDate)((1912 - 1970) * 365 * kOneDay) }; // this doesn't create an issue for 1911/12/20 | |
| 109 InitialTimeZoneRule* initialTimeZone = new InitialTimeZoneRule(UNICODE_STRING_SIMPLE("GMT+8"), 8*kOneHour, 0); | |
| 110 TimeZoneRule* rule1897 = new TimeArrayTimeZoneRule(UNICODE_STRING_SIMPLE("Korean 1897"), 7*kOneHour, 0, millis1897, 1, DateTimeRule::STANDARD_TIME); | |
| 111 TimeZoneRule* rule1898to1911 = new TimeArrayTimeZoneRule(UNICODE_STRING_SIMPLE("Korean 1898-1911"), 8*kOneHour, 0, millis1898, 1, DateTimeRule::STANDARD_TIME); | |
| 112 TimeZoneRule* ruleFrom1912 = new TimeArrayTimeZoneRule(UNICODE_STRING_SIMPLE("Korean 1912-"), 9*kOneHour, 0, millis1912, 1, DateTimeRule::STANDARD_TIME); | |
| 113 UErrorCode status = U_ZERO_ERROR; | |
| 114 RuleBasedTimeZone* dangiCalZoneAstroCalc = new RuleBasedTimeZone(UNICODE_STRING_SIMPLE("KOREA_ZONE"), initialTimeZone); // adopts initialTimeZone | |
| 115 dangiCalZoneAstroCalc->addTransitionRule(rule1897, status); // adopts rule1897 | |
| 116 dangiCalZoneAstroCalc->addTransitionRule(rule1898to1911, status); | |
| 117 dangiCalZoneAstroCalc->addTransitionRule(ruleFrom1912, status); | |
| 118 dangiCalZoneAstroCalc->complete(status); | |
| 119 if (U_SUCCESS(status)) { | |
| 120 gDangiCalendarZoneAstroCalc = dangiCalZoneAstroCalc; | |
| 121 } else { | |
| 122 delete dangiCalZoneAstroCalc; | |
| 123 gDangiCalendarZoneAstroCalc = NULL; | |
| 124 } | |
| 125 ucln_i18n_registerCleanup(UCLN_I18N_DANGI_CALENDAR, calendar_dangi_cleanup); | |
| 126 } | |
| 127 | |
| 128 const TimeZone* DangiCalendar::getDangiCalZoneAstroCalc(void) const { | |
| 129 umtx_initOnce(gDangiCalendarInitOnce, &initDangiCalZoneAstroCalc); | |
| 130 return gDangiCalendarZoneAstroCalc; | |
| 131 } | |
| 132 | |
| 133 | |
| 134 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(DangiCalendar) | |
| 135 | |
| 136 U_NAMESPACE_END | |
| 137 | |
| 138 #endif | |
| 139 |
