source/i18n/coptccal.cpp

   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 "coptccal.h"
  16 #include "cecal.h"
  17 #include <float.h>
  18
  19 U_NAMESPACE_BEGIN
  20
  21 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(CopticCalendar)
  22
  23 static const int32_t COPTIC_JD_EPOCH_OFFSET  = 1824665;
  24
  25 //-------------------------------------------------------------------------
  26 // Constructors...
  27 //-------------------------------------------------------------------------
  28
  29 CopticCalendar::CopticCalendar(const Locale& aLocale, UErrorCode& success)
  30 : CECalendar(aLocale, success)
  31 {
  32 }
  33
  34 CopticCalendar::CopticCalendar (const CopticCalendar& other)
  35 : CECalendar(other)
  36 {
  37 }
  38
  39 CopticCalendar::~CopticCalendar()
  40 {
  41 }
  42
  43 Calendar*
  44 CopticCalendar::clone() const
  45 {
  46     return new CopticCalendar(*this);
  47 }
  48
  49 const char*
  50 CopticCalendar::getType() const
  51 {
  52     return "coptic";
  53 }
  54
  55 //-------------------------------------------------------------------------
  56 // Calendar framework
  57 //-------------------------------------------------------------------------
  58
  59 int32_t
  60 CopticCalendar::handleGetExtendedYear()
  61 {
  62     int32_t eyear;
  63     if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
  64         eyear = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1
  65     } else {
  66         // The year defaults to the epoch start, the era to CE
  67         int32_t era = internalGet(UCAL_ERA, CE);
  68         if (era == BCE) {
  69             eyear = 1 - internalGet(UCAL_YEAR, 1); // Convert to extended year
  70         } else {
  71             eyear = internalGet(UCAL_YEAR, 1); // Default to year 1
  72         }
  73     }
  74     return eyear;
  75 }
  76
  77 void
  78 CopticCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/)
  79 {
  80     int32_t eyear, month, day, era, year;
  81     jdToCE(julianDay, getJDEpochOffset(), eyear, month, day);
  82
  83     if (eyear <= 0) {
  84         era = BCE;
  85         year = 1 - eyear;
  86     } else {
  87         era = CE;
  88         year = eyear;
  89     }
  90
  91     internalSet(UCAL_EXTENDED_YEAR, eyear);
  92     internalSet(UCAL_ERA, era);
  93     internalSet(UCAL_YEAR, year);
  94     internalSet(UCAL_MONTH, month);
  95     internalSet(UCAL_DATE, day);
  96     internalSet(UCAL_DAY_OF_YEAR, (30 * month) + day);
  97 }
  98
  99 /**
 100  * The system maintains a static default century start date and Year.  They are
 101  * initialized the first time they are used.  Once the system default century date
 102  * and year are set, they do not change.
 103  */
 104 static UDate           gSystemDefaultCenturyStart       = DBL_MIN;
 105 static int32_t         gSystemDefaultCenturyStartYear   = -1;
 106 static icu::UInitOnce  gSystemDefaultCenturyInit        = U_INITONCE_INITIALIZER;
 107
 108
 109 static void U_CALLCONV initializeSystemDefaultCentury() {
 110     UErrorCode status = U_ZERO_ERROR;
 111     CopticCalendar calendar(Locale("@calendar=coptic"), status);
 112     if (U_SUCCESS(status)) {
 113         calendar.setTime(Calendar::getNow(), status);
 114         calendar.add(UCAL_YEAR, -80, status);
 115         gSystemDefaultCenturyStart = calendar.getTime(status);
 116         gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status);
 117     }
 118     // We have no recourse upon failure unless we want to propagate the failure
 119     // out.
 120 }
 121
 122 UDate
 123 CopticCalendar::defaultCenturyStart() const
 124 {
 125     // lazy-evaluate systemDefaultCenturyStart
 126     umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
 127     return gSystemDefaultCenturyStart;
 128 }
 129
 130 int32_t
 131 CopticCalendar::defaultCenturyStartYear() const
 132 {
 133     // lazy-evaluate systemDefaultCenturyStart
 134     umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
 135     return gSystemDefaultCenturyStartYear;
 136 }
 137
 138
 139 int32_t
 140 CopticCalendar::getJDEpochOffset() const
 141 {
 142     return COPTIC_JD_EPOCH_OFFSET;
 143 }
 144
 145
 146 #if 0
 147 // We do not want to introduce this API in ICU4C.
 148 // It was accidentally introduced in ICU4J as a public API.
 149
 150 //-------------------------------------------------------------------------
 151 // Calendar system Conversion methods...
 152 //-------------------------------------------------------------------------
 153
 154 int32_t
 155 CopticCalendar::copticToJD(int32_t year, int32_t month, int32_t day)
 156 {
 157     return CECalendar::ceToJD(year, month, day, COPTIC_JD_EPOCH_OFFSET);
 158 }
 159 #endif
 160
 161 U_NAMESPACE_END
 162
 163 #endif /* #if !UCONFIG_NO_FORMATTING */
 164 //eof