1// Copyright (C) 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 19U_NAMESPACE_BEGIN 20 21UOBJECT_DEFINE_RTTI_IMPLEMENTATION(EthiopicCalendar) 22 23//static const int32_t JD_EPOCH_OFFSET_AMETE_ALEM = -285019; 24static const int32_t JD_EPOCH_OFFSET_AMETE_MIHRET = 1723856; 25static const int32_t AMETE_MIHRET_DELTA = 5500; // 5501 - 1 (Amete Alem 5501 = Amete Mihret 1) 26 27//------------------------------------------------------------------------- 28// Constructors... 29//------------------------------------------------------------------------- 30 31EthiopicCalendar::EthiopicCalendar(const Locale& aLocale, 32 UErrorCode& success, 33 EEraType type /*= AMETE_MIHRET_ERA*/) 34: CECalendar(aLocale, success), 35 eraType(type) 36{ 37} 38 39EthiopicCalendar::EthiopicCalendar(const EthiopicCalendar& other) 40: CECalendar(other), 41 eraType(other.eraType) 42{ 43} 44 45EthiopicCalendar::~EthiopicCalendar() 46{ 47} 48 49Calendar* 50EthiopicCalendar::clone() const 51{ 52 return new EthiopicCalendar(*this); 53} 54 55const char * 56EthiopicCalendar::getType() const 57{ 58 if (isAmeteAlemEra()) { 59 return "ethiopic-amete-alem"; 60 } 61 return "ethiopic"; 62} 63 64void 65EthiopicCalendar::setAmeteAlemEra(UBool onOff) 66{ 67 eraType = onOff ? AMETE_ALEM_ERA : AMETE_MIHRET_ERA; 68} 69 70UBool 71EthiopicCalendar::isAmeteAlemEra() const 72{ 73 return (eraType == AMETE_ALEM_ERA); 74} 75 76//------------------------------------------------------------------------- 77// Calendar framework 78//------------------------------------------------------------------------- 79 80int32_t 81EthiopicCalendar::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 103void 104EthiopicCalendar::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 130int32_t 131EthiopicCalendar::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 */ 144static UDate gSystemDefaultCenturyStart = DBL_MIN; 145static int32_t gSystemDefaultCenturyStartYear = -1; 146static icu::UInitOnce gSystemDefaultCenturyInit = U_INITONCE_INITIALIZER; 147 148static 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 163UDate 164EthiopicCalendar::defaultCenturyStart() const 165{ 166 // lazy-evaluate systemDefaultCenturyStart 167 umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury); 168 return gSystemDefaultCenturyStart; 169} 170 171int32_t 172EthiopicCalendar::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 183int32_t 184EthiopicCalendar::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 198int32_t 199EthiopicCalendar::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 205U_NAMESPACE_END 206 207#endif 208