1/* 2 ******************************************************************************* 3 * Copyright (C) 2003-2013, International Business Machines Corporation and 4 * others. All Rights Reserved. 5 ******************************************************************************* 6 * 7 * File TAIWNCAL.CPP 8 * 9 * Modification History: 10 * 05/13/2003 srl copied from gregocal.cpp 11 * 06/29/2007 srl copied from buddhcal.cpp 12 * 05/12/2008 jce modified to use calendar=roc per CLDR 13 * 14 */ 15 16#include "unicode/utypes.h" 17 18#if !UCONFIG_NO_FORMATTING 19 20#include "taiwncal.h" 21#include "unicode/gregocal.h" 22#include "umutex.h" 23#include <float.h> 24 25U_NAMESPACE_BEGIN 26 27UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TaiwanCalendar) 28 29static const int32_t kTaiwanEraStart = 1911; // 1911 (Gregorian) 30 31static const int32_t kGregorianEpoch = 1970; 32 33TaiwanCalendar::TaiwanCalendar(const Locale& aLocale, UErrorCode& success) 34: GregorianCalendar(aLocale, success) 35{ 36 setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly. 37} 38 39TaiwanCalendar::~TaiwanCalendar() 40{ 41} 42 43TaiwanCalendar::TaiwanCalendar(const TaiwanCalendar& source) 44: GregorianCalendar(source) 45{ 46} 47 48TaiwanCalendar& TaiwanCalendar::operator= ( const TaiwanCalendar& right) 49{ 50 GregorianCalendar::operator=(right); 51 return *this; 52} 53 54Calendar* TaiwanCalendar::clone(void) const 55{ 56 return new TaiwanCalendar(*this); 57} 58 59const char *TaiwanCalendar::getType() const 60{ 61 return "roc"; 62} 63 64int32_t TaiwanCalendar::handleGetExtendedYear() 65{ 66 // EXTENDED_YEAR in TaiwanCalendar is a Gregorian year 67 // The default value of EXTENDED_YEAR is 1970 (Minguo 59) 68 int32_t year = kGregorianEpoch; 69 70 if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR 71 && newerField(UCAL_EXTENDED_YEAR, UCAL_ERA) == UCAL_EXTENDED_YEAR) { 72 year = internalGet(UCAL_EXTENDED_YEAR, kGregorianEpoch); 73 } else { 74 int32_t era = internalGet(UCAL_ERA, MINGUO); 75 if(era == MINGUO) { 76 year = internalGet(UCAL_YEAR, 1) + kTaiwanEraStart; 77 } else if(era == BEFORE_MINGUO) { 78 year = 1 - internalGet(UCAL_YEAR, 1) + kTaiwanEraStart; 79 } 80 } 81 return year; 82} 83 84void TaiwanCalendar::handleComputeFields(int32_t julianDay, UErrorCode& status) 85{ 86 GregorianCalendar::handleComputeFields(julianDay, status); 87 int32_t y = internalGet(UCAL_EXTENDED_YEAR) - kTaiwanEraStart; 88 if(y>0) { 89 internalSet(UCAL_ERA, MINGUO); 90 internalSet(UCAL_YEAR, y); 91 } else { 92 internalSet(UCAL_ERA, BEFORE_MINGUO); 93 internalSet(UCAL_YEAR, 1-y); 94 } 95} 96 97int32_t TaiwanCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const 98{ 99 if(field == UCAL_ERA) { 100 if(limitType == UCAL_LIMIT_MINIMUM || limitType == UCAL_LIMIT_GREATEST_MINIMUM) { 101 return BEFORE_MINGUO; 102 } else { 103 return MINGUO; 104 } 105 } else { 106 return GregorianCalendar::handleGetLimit(field,limitType); 107 } 108} 109 110#if 0 111void TaiwanCalendar::timeToFields(UDate theTime, UBool quick, UErrorCode& status) 112{ 113 //Calendar::timeToFields(theTime, quick, status); 114 115 int32_t era = internalGet(UCAL_ERA); 116 int32_t year = internalGet(UCAL_YEAR); 117 118 if(era == GregorianCalendar::BC) { 119 year = 1-year; 120 era = TaiwanCalendar::MINGUO; 121 } else if(era == GregorianCalendar::AD) { 122 era = TaiwanCalendar::MINGUO; 123 } else { 124 status = U_INTERNAL_PROGRAM_ERROR; 125 } 126 127 year = year - kTaiwanEraStart; 128 129 internalSet(UCAL_ERA, era); 130 internalSet(UCAL_YEAR, year); 131} 132#endif 133 134/** 135 * The system maintains a static default century start date and Year. They are 136 * initialized the first time they are used. Once the system default century date 137 * and year are set, they do not change. 138 */ 139static UDate gSystemDefaultCenturyStart = DBL_MIN; 140static int32_t gSystemDefaultCenturyStartYear = -1; 141static icu::UInitOnce gSystemDefaultCenturyInit = U_INITONCE_INITIALIZER; 142 143UBool TaiwanCalendar::haveDefaultCentury() const 144{ 145 return TRUE; 146} 147 148static void U_CALLCONV initializeSystemDefaultCentury() 149{ 150 // initialize systemDefaultCentury and systemDefaultCenturyYear based 151 // on the current time. They'll be set to 80 years before 152 // the current time. 153 UErrorCode status = U_ZERO_ERROR; 154 TaiwanCalendar calendar(Locale("@calendar=roc"),status); 155 if (U_SUCCESS(status)) 156 { 157 calendar.setTime(Calendar::getNow(), status); 158 calendar.add(UCAL_YEAR, -80, status); 159 160 gSystemDefaultCenturyStart = calendar.getTime(status); 161 gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status); 162 } 163 // We have no recourse upon failure unless we want to propagate the failure 164 // out. 165} 166 167UDate TaiwanCalendar::defaultCenturyStart() const { 168 // lazy-evaluate systemDefaultCenturyStart 169 umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury); 170 return gSystemDefaultCenturyStart; 171} 172 173int32_t TaiwanCalendar::defaultCenturyStartYear() const { 174 // lazy-evaluate systemDefaultCenturyStartYear 175 umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury); 176 return gSystemDefaultCenturyStartYear; 177} 178 179U_NAMESPACE_END 180 181#endif 182