| // © 2016 and later: Unicode, Inc. and others. |
| // License & terms of use: http://www.unicode.org/copyright.html |
| /* |
| ****************************************************************************** |
| * Copyright (C) 2013, International Business Machines Corporation |
| * and others. All Rights Reserved. |
| ****************************************************************************** |
| * |
| * File DANGICAL.CPP |
| ***************************************************************************** |
| */ |
| |
| #include "chnsecal.h" |
| #include "dangical.h" |
| |
| #if !UCONFIG_NO_FORMATTING |
| |
| #if defined(STARBOARD) |
| #include "starboard/client_porting/poem/assert_poem.h" |
| #endif // defined(STARBOARD) |
| #include "gregoimp.h" // Math |
| #include "uassert.h" |
| #include "ucln_in.h" |
| #include "umutex.h" |
| #include "unicode/rbtz.h" |
| #include "unicode/tzrule.h" |
| |
| // --- The cache -- |
| static icu::TimeZone *gDangiCalendarZoneAstroCalc = NULL; |
| static icu::UInitOnce gDangiCalendarInitOnce = U_INITONCE_INITIALIZER; |
| |
| /** |
| * The start year of the Korean traditional calendar (Dan-gi) is the inaugural |
| * year of Dan-gun (BC 2333). |
| */ |
| static const int32_t DANGI_EPOCH_YEAR = -2332; // Gregorian year |
| |
| U_CDECL_BEGIN |
| static UBool calendar_dangi_cleanup(void) { |
| if (gDangiCalendarZoneAstroCalc) { |
| delete gDangiCalendarZoneAstroCalc; |
| gDangiCalendarZoneAstroCalc = NULL; |
| } |
| gDangiCalendarInitOnce.reset(); |
| return TRUE; |
| } |
| U_CDECL_END |
| |
| U_NAMESPACE_BEGIN |
| |
| // Implementation of the DangiCalendar class |
| |
| //------------------------------------------------------------------------- |
| // Constructors... |
| //------------------------------------------------------------------------- |
| |
| DangiCalendar::DangiCalendar(const Locale& aLocale, UErrorCode& success) |
| : ChineseCalendar(aLocale, DANGI_EPOCH_YEAR, getDangiCalZoneAstroCalc(), success) |
| { |
| } |
| |
| DangiCalendar::DangiCalendar (const DangiCalendar& other) |
| : ChineseCalendar(other) |
| { |
| } |
| |
| DangiCalendar::~DangiCalendar() |
| { |
| } |
| |
| DangiCalendar* |
| DangiCalendar::clone() const |
| { |
| return new DangiCalendar(*this); |
| } |
| |
| const char *DangiCalendar::getType() const { |
| return "dangi"; |
| } |
| |
| /** |
| * The time zone used for performing astronomical computations for |
| * Dangi calendar. In Korea various timezones have been used historically |
| * (cf. http://www.math.snu.ac.kr/~kye/others/lunar.html): |
| * |
| * - 1908/04/01: GMT+8 |
| * 1908/04/01 - 1911/12/31: GMT+8.5 |
| * 1912/01/01 - 1954/03/20: GMT+9 |
| * 1954/03/21 - 1961/08/09: GMT+8.5 |
| * 1961/08/10 - : GMT+9 |
| * |
| * Note that, in 1908-1911, the government did not apply the timezone change |
| * but used GMT+8. In addition, 1954-1961's timezone change does not affect |
| * the lunar date calculation. Therefore, the following simpler rule works: |
| * |
| * -1911: GMT+8 |
| * 1912-: GMT+9 |
| * |
| * Unfortunately, our astronomer's approximation doesn't agree with the |
| * references (http://www.math.snu.ac.kr/~kye/others/lunar.html and |
| * http://astro.kasi.re.kr/Life/ConvertSolarLunarForm.aspx?MenuID=115) |
| * in 1897/7/30. So the following ad hoc fix is used here: |
| * |
| * -1896: GMT+8 |
| * 1897: GMT+7 |
| * 1898-1911: GMT+8 |
| * 1912- : GMT+9 |
| */ |
| static void U_CALLCONV initDangiCalZoneAstroCalc(void) { |
| U_ASSERT(gDangiCalendarZoneAstroCalc == NULL); |
| const UDate millis1897[] = { (UDate)((1897 - 1970) * 365 * kOneDay) }; // some days of error is not a problem here |
| const UDate millis1898[] = { (UDate)((1898 - 1970) * 365 * kOneDay) }; // some days of error is not a problem here |
| const UDate millis1912[] = { (UDate)((1912 - 1970) * 365 * kOneDay) }; // this doesn't create an issue for 1911/12/20 |
| InitialTimeZoneRule* initialTimeZone = new InitialTimeZoneRule(UNICODE_STRING_SIMPLE("GMT+8"), 8*kOneHour, 0); |
| TimeZoneRule* rule1897 = new TimeArrayTimeZoneRule(UNICODE_STRING_SIMPLE("Korean 1897"), 7*kOneHour, 0, millis1897, 1, DateTimeRule::STANDARD_TIME); |
| TimeZoneRule* rule1898to1911 = new TimeArrayTimeZoneRule(UNICODE_STRING_SIMPLE("Korean 1898-1911"), 8*kOneHour, 0, millis1898, 1, DateTimeRule::STANDARD_TIME); |
| TimeZoneRule* ruleFrom1912 = new TimeArrayTimeZoneRule(UNICODE_STRING_SIMPLE("Korean 1912-"), 9*kOneHour, 0, millis1912, 1, DateTimeRule::STANDARD_TIME); |
| UErrorCode status = U_ZERO_ERROR; |
| RuleBasedTimeZone* dangiCalZoneAstroCalc = new RuleBasedTimeZone(UNICODE_STRING_SIMPLE("KOREA_ZONE"), initialTimeZone); // adopts initialTimeZone |
| dangiCalZoneAstroCalc->addTransitionRule(rule1897, status); // adopts rule1897 |
| dangiCalZoneAstroCalc->addTransitionRule(rule1898to1911, status); |
| dangiCalZoneAstroCalc->addTransitionRule(ruleFrom1912, status); |
| dangiCalZoneAstroCalc->complete(status); |
| if (U_SUCCESS(status)) { |
| gDangiCalendarZoneAstroCalc = dangiCalZoneAstroCalc; |
| } else { |
| delete dangiCalZoneAstroCalc; |
| gDangiCalendarZoneAstroCalc = NULL; |
| } |
| ucln_i18n_registerCleanup(UCLN_I18N_DANGI_CALENDAR, calendar_dangi_cleanup); |
| } |
| |
| const TimeZone* DangiCalendar::getDangiCalZoneAstroCalc(void) const { |
| umtx_initOnce(gDangiCalendarInitOnce, &initDangiCalZoneAstroCalc); |
| return gDangiCalendarZoneAstroCalc; |
| } |
| |
| |
| UOBJECT_DEFINE_RTTI_IMPLEMENTATION(DangiCalendar) |
| |
| U_NAMESPACE_END |
| |
| #endif |
| |