1/* 2******************************************************************************* 3* Copyright (C) 2003 - 2009, International Business Machines Corporation and * 4* others. All Rights Reserved. * 5******************************************************************************* 6*/ 7 8#include "unicode/utypes.h" 9 10#if !UCONFIG_NO_FORMATTING 11 12#include "umutex.h" 13#include "ethpccal.h" 14#include "cecal.h" 15#include <float.h> 16 17U_NAMESPACE_BEGIN 18 19UOBJECT_DEFINE_RTTI_IMPLEMENTATION(EthiopicCalendar) 20 21//static const int32_t JD_EPOCH_OFFSET_AMETE_ALEM = -285019; 22static const int32_t JD_EPOCH_OFFSET_AMETE_MIHRET = 1723856; 23static const int32_t AMETE_MIHRET_DELTA = 5500; // 5501 - 1 (Amete Alem 5501 = Amete Mihret 1) 24 25//------------------------------------------------------------------------- 26// Constructors... 27//------------------------------------------------------------------------- 28 29EthiopicCalendar::EthiopicCalendar(const Locale& aLocale, 30 UErrorCode& success, 31 EEraType type /*= AMETE_MIHRET_ERA*/) 32: CECalendar(aLocale, success), 33 eraType(type) 34{ 35} 36 37EthiopicCalendar::EthiopicCalendar(const EthiopicCalendar& other) 38: CECalendar(other), 39 eraType(other.eraType) 40{ 41} 42 43EthiopicCalendar::~EthiopicCalendar() 44{ 45} 46 47Calendar* 48EthiopicCalendar::clone() const 49{ 50 return new EthiopicCalendar(*this); 51} 52 53const char * 54EthiopicCalendar::getType() const 55{ 56 if (isAmeteAlemEra()) { 57 return "ethiopic-amete-alem"; 58 } 59 return "ethiopic"; 60} 61 62void 63EthiopicCalendar::setAmeteAlemEra(UBool onOff) 64{ 65 eraType = onOff ? AMETE_ALEM_ERA : AMETE_MIHRET_ERA; 66} 67 68UBool 69EthiopicCalendar::isAmeteAlemEra() const 70{ 71 return (eraType == AMETE_ALEM_ERA); 72} 73 74//------------------------------------------------------------------------- 75// Calendar framework 76//------------------------------------------------------------------------- 77 78int32_t 79EthiopicCalendar::handleGetExtendedYear() 80{ 81 // Ethiopic calendar uses EXTENDED_YEAR aligned to 82 // Amelete Hihret year always. 83 int32_t eyear; 84 if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) { 85 eyear = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1 86 } else if (isAmeteAlemEra()) { 87 eyear = internalGet(UCAL_YEAR, 1 + AMETE_MIHRET_DELTA) 88 - AMETE_MIHRET_DELTA; // Default to year 1 of Amelete Mihret 89 } else { 90 // The year defaults to the epoch start, the era to AMETE_MIHRET 91 int32_t era = internalGet(UCAL_ERA, AMETE_MIHRET); 92 if (era == AMETE_MIHRET) { 93 eyear = internalGet(UCAL_YEAR, 1); // Default to year 1 94 } else { 95 eyear = internalGet(UCAL_YEAR, 1) - AMETE_MIHRET_DELTA; 96 } 97 } 98 return eyear; 99} 100 101void 102EthiopicCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/) 103{ 104 int32_t eyear, month, day, era, year; 105 jdToCE(julianDay, getJDEpochOffset(), eyear, month, day); 106 107 if (isAmeteAlemEra()) { 108 era = AMETE_ALEM; 109 year = eyear + AMETE_MIHRET_DELTA; 110 } else { 111 if (eyear > 0) { 112 era = AMETE_MIHRET; 113 year = eyear; 114 } else { 115 era = AMETE_ALEM; 116 year = eyear + AMETE_MIHRET_DELTA; 117 } 118 } 119 120 internalSet(UCAL_EXTENDED_YEAR, eyear); 121 internalSet(UCAL_ERA, era); 122 internalSet(UCAL_YEAR, year); 123 internalSet(UCAL_MONTH, month); 124 internalSet(UCAL_DATE, day); 125 internalSet(UCAL_DAY_OF_YEAR, (30 * month) + day); 126} 127 128int32_t 129EthiopicCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const 130{ 131 if (isAmeteAlemEra() && field == UCAL_ERA) { 132 return 0; // Only one era in this mode, era is always 0 133 } 134 return CECalendar::handleGetLimit(field, limitType); 135} 136 137const UDate EthiopicCalendar::fgSystemDefaultCentury = DBL_MIN; 138const int32_t EthiopicCalendar::fgSystemDefaultCenturyYear = -1; 139 140UDate EthiopicCalendar::fgSystemDefaultCenturyStart = DBL_MIN; 141int32_t EthiopicCalendar::fgSystemDefaultCenturyStartYear = -1; 142 143UDate 144EthiopicCalendar::defaultCenturyStart() const 145{ 146 initializeSystemDefaultCentury(); 147 return fgSystemDefaultCenturyStart; 148} 149 150int32_t 151EthiopicCalendar::defaultCenturyStartYear() const 152{ 153 initializeSystemDefaultCentury(); 154 if (isAmeteAlemEra()) { 155 return fgSystemDefaultCenturyStartYear + AMETE_MIHRET_DELTA; 156 } 157 return fgSystemDefaultCenturyStartYear; 158} 159 160void 161EthiopicCalendar::initializeSystemDefaultCentury() 162{ 163 // lazy-evaluate systemDefaultCenturyStart 164 UBool needsUpdate; 165 UMTX_CHECK(NULL, (fgSystemDefaultCenturyStart == fgSystemDefaultCentury), needsUpdate); 166 167 if (!needsUpdate) { 168 return; 169 } 170 171 UErrorCode status = U_ZERO_ERROR; 172 173 EthiopicCalendar calendar(Locale("@calendar=ethiopic"), status); 174 if (U_SUCCESS(status)) { 175 calendar.setTime(Calendar::getNow(), status); 176 calendar.add(UCAL_YEAR, -80, status); 177 UDate newStart = calendar.getTime(status); 178 int32_t newYear = calendar.get(UCAL_YEAR, status); 179 { 180 umtx_lock(NULL); 181 fgSystemDefaultCenturyStartYear = newYear; 182 fgSystemDefaultCenturyStart = newStart; 183 umtx_unlock(NULL); 184 } 185 } 186 // We have no recourse upon failure unless we want to propagate the failure 187 // out. 188} 189 190int32_t 191EthiopicCalendar::getJDEpochOffset() const 192{ 193 return JD_EPOCH_OFFSET_AMETE_MIHRET; 194} 195 196 197#if 0 198// We do not want to introduce this API in ICU4C. 199// It was accidentally introduced in ICU4J as a public API. 200 201//------------------------------------------------------------------------- 202// Calendar system Conversion methods... 203//------------------------------------------------------------------------- 204 205int32_t 206EthiopicCalendar::ethiopicToJD(int32_t year, int32_t month, int32_t date) 207{ 208 return ceToJD(year, month, date, JD_EPOCH_OFFSET_AMETE_MIHRET); 209} 210#endif 211 212U_NAMESPACE_END 213 214#endif 215