1 // 2016 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 /* 4 ******************************************************************************* 5 * Copyright (C) 2003 - 2013, International Business Machines Corporation and 6 * others. All Rights Reserved. 7 ******************************************************************************* 8 */ 9 10 #include "unicode/utypes.h" 11 12 #if !UCONFIG_NO_FORMATTING 13 14 #include "umutex.h" 15 #include "ethpccal.h" 16 #include "cecal.h" 17 #include <float.h> 18 19 U_NAMESPACE_BEGIN 20 21 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(EthiopicCalendar) 22 23 //static const int32_t JD_EPOCH_OFFSET_AMETE_ALEM = -285019; 24 static const int32_t JD_EPOCH_OFFSET_AMETE_MIHRET = 1723856; 25 static const int32_t AMETE_MIHRET_DELTA = 5500; // 5501 - 1 (Amete Alem 5501 = Amete Mihret 1) 26 27 //------------------------------------------------------------------------- 28 // Constructors... 29 //------------------------------------------------------------------------- 30 31 EthiopicCalendar::EthiopicCalendar(const Locale& aLocale, 32 UErrorCode& success, 33 EEraType type /*= AMETE_MIHRET_ERA*/) 34 : CECalendar(aLocale, success), 35 eraType(type) 36 { 37 } 38 39 EthiopicCalendar::EthiopicCalendar(const EthiopicCalendar& other) 40 : CECalendar(other), 41 eraType(other.eraType) 42 { 43 } 44 45 EthiopicCalendar::~EthiopicCalendar() 46 { 47 } 48 49 Calendar* 50 EthiopicCalendar::clone() const 51 { 52 return new EthiopicCalendar(*this); 53 } 54 55 const char * 56 EthiopicCalendar::getType() const 57 { 58 if (isAmeteAlemEra()) { 59 return "ethiopic-amete-alem"; 60 } 61 return "ethiopic"; 62 } 63 64 void 65 EthiopicCalendar::setAmeteAlemEra(UBool onOff) 66 { 67 eraType = onOff ? AMETE_ALEM_ERA : AMETE_MIHRET_ERA; 68 } 69 70 UBool 71 EthiopicCalendar::isAmeteAlemEra() const 72 { 73 return (eraType == AMETE_ALEM_ERA); 74 } 75 76 //------------------------------------------------------------------------- 77 // Calendar framework 78 //------------------------------------------------------------------------- 79 80 int32_t 81 EthiopicCalendar::handleGetExtendedYear() 82 { 83 // Ethiopic calendar uses EXTENDED_YEAR aligned to 84 // Amelete Hihret year always. 85 int32_t eyear; 86 if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) { 87 eyear = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1 88 } else if (isAmeteAlemEra()) { 89 eyear = internalGet(UCAL_YEAR, 1 + AMETE_MIHRET_DELTA) 90 - AMETE_MIHRET_DELTA; // Default to year 1 of Amelete Mihret 91 } else { 92 // The year defaults to the epoch start, the era to AMETE_MIHRET 93 int32_t era = internalGet(UCAL_ERA, AMETE_MIHRET); 94 if (era == AMETE_MIHRET) { 95 eyear = internalGet(UCAL_YEAR, 1); // Default to year 1 96 } else { 97 eyear = internalGet(UCAL_YEAR, 1) - AMETE_MIHRET_DELTA; 98 } 99 } 100 return eyear; 101 } 102 103 void 104 EthiopicCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/) 105 { 106 int32_t eyear, month, day, era, year; 107 jdToCE(julianDay, getJDEpochOffset(), eyear, month, day); 108 109 if (isAmeteAlemEra()) { 110 era = AMETE_ALEM; 111 year = eyear + AMETE_MIHRET_DELTA; 112 } else { 113 if (eyear > 0) { 114 era = AMETE_MIHRET; 115 year = eyear; 116 } else { 117 era = AMETE_ALEM; 118 year = eyear + AMETE_MIHRET_DELTA; 119 } 120 } 121 122 internalSet(UCAL_EXTENDED_YEAR, eyear); 123 internalSet(UCAL_ERA, era); 124 internalSet(UCAL_YEAR, year); 125 internalSet(UCAL_MONTH, month); 126 internalSet(UCAL_DATE, day); 127 internalSet(UCAL_DAY_OF_YEAR, (30 * month) + day); 128 } 129 130 int32_t 131 EthiopicCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const 132 { 133 if (isAmeteAlemEra() && field == UCAL_ERA) { 134 return 0; // Only one era in this mode, era is always 0 135 } 136 return CECalendar::handleGetLimit(field, limitType); 137 } 138 139 /** 140 * The system maintains a static default century start date and Year. They are 141 * initialized the first time they are used. Once the system default century date 142 * and year are set, they do not change. 143 */ 144 static UDate gSystemDefaultCenturyStart = DBL_MIN; 145 static int32_t gSystemDefaultCenturyStartYear = -1; 146 static icu::UInitOnce gSystemDefaultCenturyInit = U_INITONCE_INITIALIZER; 147 148 static void U_CALLCONV initializeSystemDefaultCentury() 149 { 150 UErrorCode status = U_ZERO_ERROR; 151 EthiopicCalendar calendar(Locale("@calendar=ethiopic"), status); 152 if (U_SUCCESS(status)) { 153 calendar.setTime(Calendar::getNow(), status); 154 calendar.add(UCAL_YEAR, -80, status); 155 156 gSystemDefaultCenturyStart = calendar.getTime(status); 157 gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status); 158 } 159 // We have no recourse upon failure unless we want to propagate the failure 160 // out. 161 } 162 163 UDate 164 EthiopicCalendar::defaultCenturyStart() const 165 { 166 // lazy-evaluate systemDefaultCenturyStart 167 umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury); 168 return gSystemDefaultCenturyStart; 169 } 170 171 int32_t 172 EthiopicCalendar::defaultCenturyStartYear() const 173 { 174 // lazy-evaluate systemDefaultCenturyStartYear 175 umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury); 176 if (isAmeteAlemEra()) { 177 return gSystemDefaultCenturyStartYear + AMETE_MIHRET_DELTA; 178 } 179 return gSystemDefaultCenturyStartYear; 180 } 181 182 183 int32_t 184 EthiopicCalendar::getJDEpochOffset() const 185 { 186 return JD_EPOCH_OFFSET_AMETE_MIHRET; 187 } 188 189 190 #if 0 191 // We do not want to introduce this API in ICU4C. 192 // It was accidentally introduced in ICU4J as a public API. 193 194 //------------------------------------------------------------------------- 195 // Calendar system Conversion methods... 196 //------------------------------------------------------------------------- 197 198 int32_t 199 EthiopicCalendar::ethiopicToJD(int32_t year, int32_t month, int32_t date) 200 { 201 return ceToJD(year, month, date, JD_EPOCH_OFFSET_AMETE_MIHRET); 202 } 203 #endif 204 205 U_NAMESPACE_END 206 207 #endif 208
