1 // Copyright (C) 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
4 *******************************************************************************
5 * Copyright (C) 2003-2013, International Business Machines Corporation and
6 * others. All Rights Reserved.
7 *******************************************************************************
11 * Modification History:
12 * 05/13/2003 srl copied from gregocal.cpp
13 * 06/29/2007 srl copied from buddhcal.cpp
14 * 05/12/2008 jce modified to use calendar=roc per CLDR
18 #include "unicode/utypes.h"
20 #if !UCONFIG_NO_FORMATTING
23 #include "unicode/gregocal.h"
29 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TaiwanCalendar)
31 static const int32_t kTaiwanEraStart = 1911; // 1911 (Gregorian)
33 static const int32_t kGregorianEpoch = 1970;
35 TaiwanCalendar::TaiwanCalendar(const Locale& aLocale, UErrorCode& success)
36 : GregorianCalendar(aLocale, success)
38 setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
41 TaiwanCalendar::~TaiwanCalendar()
45 TaiwanCalendar::TaiwanCalendar(const TaiwanCalendar& source)
46 : GregorianCalendar(source)
50 TaiwanCalendar& TaiwanCalendar::operator= ( const TaiwanCalendar& right)
52 GregorianCalendar::operator=(right);
56 Calendar* TaiwanCalendar::clone(void) const
58 return new TaiwanCalendar(*this);
61 const char *TaiwanCalendar::getType() const
66 int32_t TaiwanCalendar::handleGetExtendedYear()
68 // EXTENDED_YEAR in TaiwanCalendar is a Gregorian year
69 // The default value of EXTENDED_YEAR is 1970 (Minguo 59)
70 int32_t year = kGregorianEpoch;
72 if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR
73 && newerField(UCAL_EXTENDED_YEAR, UCAL_ERA) == UCAL_EXTENDED_YEAR) {
74 year = internalGet(UCAL_EXTENDED_YEAR, kGregorianEpoch);
76 int32_t era = internalGet(UCAL_ERA, MINGUO);
78 year = internalGet(UCAL_YEAR, 1) + kTaiwanEraStart;
79 } else if(era == BEFORE_MINGUO) {
80 year = 1 - internalGet(UCAL_YEAR, 1) + kTaiwanEraStart;
86 void TaiwanCalendar::handleComputeFields(int32_t julianDay, UErrorCode& status)
88 GregorianCalendar::handleComputeFields(julianDay, status);
89 int32_t y = internalGet(UCAL_EXTENDED_YEAR) - kTaiwanEraStart;
91 internalSet(UCAL_ERA, MINGUO);
92 internalSet(UCAL_YEAR, y);
94 internalSet(UCAL_ERA, BEFORE_MINGUO);
95 internalSet(UCAL_YEAR, 1-y);
99 int32_t TaiwanCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
101 if(field == UCAL_ERA) {
102 if(limitType == UCAL_LIMIT_MINIMUM || limitType == UCAL_LIMIT_GREATEST_MINIMUM) {
103 return BEFORE_MINGUO;
108 return GregorianCalendar::handleGetLimit(field,limitType);
113 void TaiwanCalendar::timeToFields(UDate theTime, UBool quick, UErrorCode& status)
115 //Calendar::timeToFields(theTime, quick, status);
117 int32_t era = internalGet(UCAL_ERA);
118 int32_t year = internalGet(UCAL_YEAR);
120 if(era == GregorianCalendar::BC) {
122 era = TaiwanCalendar::MINGUO;
123 } else if(era == GregorianCalendar::AD) {
124 era = TaiwanCalendar::MINGUO;
126 status = U_INTERNAL_PROGRAM_ERROR;
129 year = year - kTaiwanEraStart;
131 internalSet(UCAL_ERA, era);
132 internalSet(UCAL_YEAR, year);
137 * The system maintains a static default century start date and Year. They are
138 * initialized the first time they are used. Once the system default century date
139 * and year are set, they do not change.
141 static UDate gSystemDefaultCenturyStart = DBL_MIN;
142 static int32_t gSystemDefaultCenturyStartYear = -1;
143 static icu::UInitOnce gSystemDefaultCenturyInit = U_INITONCE_INITIALIZER;
145 UBool TaiwanCalendar::haveDefaultCentury() const
150 static void U_CALLCONV initializeSystemDefaultCentury()
152 // initialize systemDefaultCentury and systemDefaultCenturyYear based
153 // on the current time. They'll be set to 80 years before
155 UErrorCode status = U_ZERO_ERROR;
156 TaiwanCalendar calendar(Locale("@calendar=roc"),status);
157 if (U_SUCCESS(status))
159 calendar.setTime(Calendar::getNow(), status);
160 calendar.add(UCAL_YEAR, -80, status);
162 gSystemDefaultCenturyStart = calendar.getTime(status);
163 gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status);
165 // We have no recourse upon failure unless we want to propagate the failure
169 UDate TaiwanCalendar::defaultCenturyStart() const {
170 // lazy-evaluate systemDefaultCenturyStart
171 umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
172 return gSystemDefaultCenturyStart;
175 int32_t TaiwanCalendar::defaultCenturyStartYear() const {
176 // lazy-evaluate systemDefaultCenturyStartYear
177 umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
178 return gSystemDefaultCenturyStartYear;