1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/intl/icu/source/i18n/dangical.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,139 @@
1.4 +/*
1.5 + ******************************************************************************
1.6 + * Copyright (C) 2013, International Business Machines Corporation
1.7 + * and others. All Rights Reserved.
1.8 + ******************************************************************************
1.9 + *
1.10 + * File DANGICAL.CPP
1.11 + *****************************************************************************
1.12 + */
1.13 +
1.14 +#include "chnsecal.h"
1.15 +#include "dangical.h"
1.16 +
1.17 +#if !UCONFIG_NO_FORMATTING
1.18 +
1.19 +#include "gregoimp.h" // Math
1.20 +#include "uassert.h"
1.21 +#include "ucln_in.h"
1.22 +#include "umutex.h"
1.23 +#include "unicode/rbtz.h"
1.24 +#include "unicode/tzrule.h"
1.25 +
1.26 +// --- The cache --
1.27 +static icu::TimeZone *gDangiCalendarZoneAstroCalc = NULL;
1.28 +static icu::UInitOnce gDangiCalendarInitOnce = U_INITONCE_INITIALIZER;
1.29 +
1.30 +/**
1.31 + * The start year of the Korean traditional calendar (Dan-gi) is the inaugural
1.32 + * year of Dan-gun (BC 2333).
1.33 + */
1.34 +static const int32_t DANGI_EPOCH_YEAR = -2332; // Gregorian year
1.35 +
1.36 +U_CDECL_BEGIN
1.37 +static UBool calendar_dangi_cleanup(void) {
1.38 + if (gDangiCalendarZoneAstroCalc) {
1.39 + delete gDangiCalendarZoneAstroCalc;
1.40 + gDangiCalendarZoneAstroCalc = NULL;
1.41 + }
1.42 + gDangiCalendarInitOnce.reset();
1.43 + return TRUE;
1.44 +}
1.45 +U_CDECL_END
1.46 +
1.47 +U_NAMESPACE_BEGIN
1.48 +
1.49 +// Implementation of the DangiCalendar class
1.50 +
1.51 +//-------------------------------------------------------------------------
1.52 +// Constructors...
1.53 +//-------------------------------------------------------------------------
1.54 +
1.55 +DangiCalendar::DangiCalendar(const Locale& aLocale, UErrorCode& success)
1.56 +: ChineseCalendar(aLocale, DANGI_EPOCH_YEAR, getDangiCalZoneAstroCalc(), success)
1.57 +{
1.58 +}
1.59 +
1.60 +DangiCalendar::DangiCalendar (const DangiCalendar& other)
1.61 +: ChineseCalendar(other)
1.62 +{
1.63 +}
1.64 +
1.65 +DangiCalendar::~DangiCalendar()
1.66 +{
1.67 +}
1.68 +
1.69 +Calendar*
1.70 +DangiCalendar::clone() const
1.71 +{
1.72 + return new DangiCalendar(*this);
1.73 +}
1.74 +
1.75 +const char *DangiCalendar::getType() const {
1.76 + return "dangi";
1.77 +}
1.78 +
1.79 +/**
1.80 + * The time zone used for performing astronomical computations for
1.81 + * Dangi calendar. In Korea various timezones have been used historically
1.82 + * (cf. http://www.math.snu.ac.kr/~kye/others/lunar.html):
1.83 + *
1.84 + * - 1908/04/01: GMT+8
1.85 + * 1908/04/01 - 1911/12/31: GMT+8.5
1.86 + * 1912/01/01 - 1954/03/20: GMT+9
1.87 + * 1954/03/21 - 1961/08/09: GMT+8.5
1.88 + * 1961/08/10 - : GMT+9
1.89 + *
1.90 + * Note that, in 1908-1911, the government did not apply the timezone change
1.91 + * but used GMT+8. In addition, 1954-1961's timezone change does not affect
1.92 + * the lunar date calculation. Therefore, the following simpler rule works:
1.93 + *
1.94 + * -1911: GMT+8
1.95 + * 1912-: GMT+9
1.96 + *
1.97 + * Unfortunately, our astronomer's approximation doesn't agree with the
1.98 + * references (http://www.math.snu.ac.kr/~kye/others/lunar.html and
1.99 + * http://astro.kasi.re.kr/Life/ConvertSolarLunarForm.aspx?MenuID=115)
1.100 + * in 1897/7/30. So the following ad hoc fix is used here:
1.101 + *
1.102 + * -1896: GMT+8
1.103 + * 1897: GMT+7
1.104 + * 1898-1911: GMT+8
1.105 + * 1912- : GMT+9
1.106 + */
1.107 +static void U_CALLCONV initDangiCalZoneAstroCalc(void) {
1.108 + U_ASSERT(gDangiCalendarZoneAstroCalc == NULL);
1.109 + const UDate millis1897[] = { (UDate)((1897 - 1970) * 365 * kOneDay) }; // some days of error is not a problem here
1.110 + const UDate millis1898[] = { (UDate)((1898 - 1970) * 365 * kOneDay) }; // some days of error is not a problem here
1.111 + const UDate millis1912[] = { (UDate)((1912 - 1970) * 365 * kOneDay) }; // this doesn't create an issue for 1911/12/20
1.112 + InitialTimeZoneRule* initialTimeZone = new InitialTimeZoneRule(UNICODE_STRING_SIMPLE("GMT+8"), 8*kOneHour, 0);
1.113 + TimeZoneRule* rule1897 = new TimeArrayTimeZoneRule(UNICODE_STRING_SIMPLE("Korean 1897"), 7*kOneHour, 0, millis1897, 1, DateTimeRule::STANDARD_TIME);
1.114 + TimeZoneRule* rule1898to1911 = new TimeArrayTimeZoneRule(UNICODE_STRING_SIMPLE("Korean 1898-1911"), 8*kOneHour, 0, millis1898, 1, DateTimeRule::STANDARD_TIME);
1.115 + TimeZoneRule* ruleFrom1912 = new TimeArrayTimeZoneRule(UNICODE_STRING_SIMPLE("Korean 1912-"), 9*kOneHour, 0, millis1912, 1, DateTimeRule::STANDARD_TIME);
1.116 + UErrorCode status = U_ZERO_ERROR;
1.117 + RuleBasedTimeZone* dangiCalZoneAstroCalc = new RuleBasedTimeZone(UNICODE_STRING_SIMPLE("KOREA_ZONE"), initialTimeZone); // adopts initialTimeZone
1.118 + dangiCalZoneAstroCalc->addTransitionRule(rule1897, status); // adopts rule1897
1.119 + dangiCalZoneAstroCalc->addTransitionRule(rule1898to1911, status);
1.120 + dangiCalZoneAstroCalc->addTransitionRule(ruleFrom1912, status);
1.121 + dangiCalZoneAstroCalc->complete(status);
1.122 + if (U_SUCCESS(status)) {
1.123 + gDangiCalendarZoneAstroCalc = dangiCalZoneAstroCalc;
1.124 + } else {
1.125 + delete dangiCalZoneAstroCalc;
1.126 + gDangiCalendarZoneAstroCalc = NULL;
1.127 + }
1.128 + ucln_i18n_registerCleanup(UCLN_I18N_DANGI_CALENDAR, calendar_dangi_cleanup);
1.129 +}
1.130 +
1.131 +const TimeZone* DangiCalendar::getDangiCalZoneAstroCalc(void) const {
1.132 + umtx_initOnce(gDangiCalendarInitOnce, &initDangiCalZoneAstroCalc);
1.133 + return gDangiCalendarZoneAstroCalc;
1.134 +}
1.135 +
1.136 +
1.137 +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(DangiCalendar)
1.138 +
1.139 +U_NAMESPACE_END
1.140 +
1.141 +#endif
1.142 +
