Home | History | Annotate | Download | only in i18n 
      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
    165