src/third_party/icu/source/i18n/coptccal.cpp

   1 /*
   2 *******************************************************************************
   3 * Copyright (C) 2003 - 2013, 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 "coptccal.h"
  14 #include "cecal.h"
  15 #include <float.h>
  16
  17 U_NAMESPACE_BEGIN
  18
  19 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(CopticCalendar)
  20
  21 static const int32_t COPTIC_JD_EPOCH_OFFSET  = 1824665;
  22
  23 //-------------------------------------------------------------------------
  24 // Constructors...
  25 //-------------------------------------------------------------------------
  26
  27 CopticCalendar::CopticCalendar(const Locale& aLocale, UErrorCode& success)
  28 : CECalendar(aLocale, success)
  29 {
  30 }
  31
  32 CopticCalendar::CopticCalendar (const CopticCalendar& other)
  33 : CECalendar(other)
  34 {
  35 }
  36
  37 CopticCalendar::~CopticCalendar()
  38 {
  39 }
  40
  41 Calendar*
  42 CopticCalendar::clone() const
  43 {
  44     return new CopticCalendar(*this);
  45 }
  46
  47 const char*
  48 CopticCalendar::getType() const
  49 {
  50     return "coptic";
  51 }
  52
  53 //-------------------------------------------------------------------------
  54 // Calendar framework
  55 //-------------------------------------------------------------------------
  56
  57 int32_t
  58 CopticCalendar::handleGetExtendedYear()
  59 {
  60     int32_t eyear;
  61     if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
  62         eyear = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1
  63     } else {
  64         // The year defaults to the epoch start, the era to CE
  65         int32_t era = internalGet(UCAL_ERA, CE);
  66         if (era == BCE) {
  67             eyear = 1 - internalGet(UCAL_YEAR, 1); // Convert to extended year
  68         } else {
  69             eyear = internalGet(UCAL_YEAR, 1); // Default to year 1
  70         }
  71     }
  72     return eyear;
  73 }
  74
  75 void
  76 CopticCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/)
  77 {
  78     int32_t eyear, month, day, era, year;
  79     jdToCE(julianDay, getJDEpochOffset(), eyear, month, day);
  80
  81     if (eyear <= 0) {
  82         era = BCE;
  83         year = 1 - eyear;
  84     } else {
  85         era = CE;
  86         year = eyear;
  87     }
  88
  89     internalSet(UCAL_EXTENDED_YEAR, eyear);
  90     internalSet(UCAL_ERA, era);
  91     internalSet(UCAL_YEAR, year);
  92     internalSet(UCAL_MONTH, month);
  93     internalSet(UCAL_DATE, day);
  94     internalSet(UCAL_DAY_OF_YEAR, (30 * month) + day);
  95 }
  96
  97 /**
  98  * The system maintains a static default century start date and Year.  They are
  99  * initialized the first time they are used.  Once the system default century date
 100  * and year are set, they do not change.
 101  */
 102 static UDate           gSystemDefaultCenturyStart       = DBL_MIN;
 103 static int32_t         gSystemDefaultCenturyStartYear   = -1;
 104 static icu::UInitOnce  gSystemDefaultCenturyInit        = U_INITONCE_INITIALIZER;
 105
 106
 107 static void U_CALLCONV initializeSystemDefaultCentury() {
 108     UErrorCode status = U_ZERO_ERROR;
 109     CopticCalendar calendar(Locale("@calendar=coptic"), status);
 110     if (U_SUCCESS(status)) {
 111         calendar.setTime(Calendar::getNow(), status);
 112         calendar.add(UCAL_YEAR, -80, status);
 113         gSystemDefaultCenturyStart = calendar.getTime(status);
 114         gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status);
 115     }
 116     // We have no recourse upon failure unless we want to propagate the failure
 117     // out.
 118 }
 119
 120 UDate
 121 CopticCalendar::defaultCenturyStart() const
 122 {
 123     // lazy-evaluate systemDefaultCenturyStart
 124     umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
 125     return gSystemDefaultCenturyStart;
 126 }
 127
 128 int32_t
 129 CopticCalendar::defaultCenturyStartYear() const
 130 {
 131     // lazy-evaluate systemDefaultCenturyStart
 132     umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
 133     return gSystemDefaultCenturyStartYear;
 134 }
 135
 136
 137 int32_t
 138 CopticCalendar::getJDEpochOffset() const
 139 {
 140     return COPTIC_JD_EPOCH_OFFSET;
 141 }
 142
 143
 144 #if 0
 145 // We do not want to introduce this API in ICU4C.
 146 // It was accidentally introduced in ICU4J as a public API.
 147
 148 //-------------------------------------------------------------------------
 149 // Calendar system Conversion methods...
 150 //-------------------------------------------------------------------------
 151
 152 int32_t
 153 CopticCalendar::copticToJD(int32_t year, int32_t month, int32_t day)
 154 {
 155     return CECalendar::ceToJD(year, month, day, COPTIC_JD_EPOCH_OFFSET);
 156 }
 157 #endif
 158
 159 U_NAMESPACE_END
 160
 161 #endif /* #if !UCONFIG_NO_FORMATTING */
 162 //eof