michael@0: /*
michael@0: *******************************************************************************
michael@0: * Copyright (C) 2003 - 2013, International Business Machines Corporation and
michael@0: * others. All Rights Reserved.
michael@0: *******************************************************************************
michael@0: */
michael@0: 
michael@0: #include "unicode/utypes.h"
michael@0: 
michael@0: #if !UCONFIG_NO_FORMATTING
michael@0: 
michael@0: #include "umutex.h"
michael@0: #include "coptccal.h"
michael@0: #include "cecal.h"
michael@0: #include <float.h>
michael@0: 
michael@0: U_NAMESPACE_BEGIN
michael@0: 
michael@0: UOBJECT_DEFINE_RTTI_IMPLEMENTATION(CopticCalendar)
michael@0: 
michael@0: static const int32_t COPTIC_JD_EPOCH_OFFSET  = 1824665;
michael@0: 
michael@0: //-------------------------------------------------------------------------
michael@0: // Constructors...
michael@0: //-------------------------------------------------------------------------
michael@0: 
michael@0: CopticCalendar::CopticCalendar(const Locale& aLocale, UErrorCode& success)
michael@0: : CECalendar(aLocale, success)
michael@0: {
michael@0: }
michael@0: 
michael@0: CopticCalendar::CopticCalendar (const CopticCalendar& other) 
michael@0: : CECalendar(other)
michael@0: {
michael@0: }
michael@0: 
michael@0: CopticCalendar::~CopticCalendar()
michael@0: {
michael@0: }
michael@0: 
michael@0: Calendar*
michael@0: CopticCalendar::clone() const
michael@0: {
michael@0:     return new CopticCalendar(*this);
michael@0: }
michael@0: 
michael@0: const char*
michael@0: CopticCalendar::getType() const
michael@0: {
michael@0:     return "coptic";
michael@0: }
michael@0: 
michael@0: //-------------------------------------------------------------------------
michael@0: // Calendar framework
michael@0: //-------------------------------------------------------------------------
michael@0: 
michael@0: int32_t
michael@0: CopticCalendar::handleGetExtendedYear()
michael@0: {
michael@0:     int32_t eyear;
michael@0:     if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
michael@0:         eyear = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1
michael@0:     } else {
michael@0:         // The year defaults to the epoch start, the era to CE
michael@0:         int32_t era = internalGet(UCAL_ERA, CE);
michael@0:         if (era == BCE) {
michael@0:             eyear = 1 - internalGet(UCAL_YEAR, 1); // Convert to extended year
michael@0:         } else {
michael@0:             eyear = internalGet(UCAL_YEAR, 1); // Default to year 1
michael@0:         }
michael@0:     }
michael@0:     return eyear;
michael@0: }
michael@0: 
michael@0: void
michael@0: CopticCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/)
michael@0: {
michael@0:     int32_t eyear, month, day, era, year;
michael@0:     jdToCE(julianDay, getJDEpochOffset(), eyear, month, day);
michael@0: 
michael@0:     if (eyear <= 0) {
michael@0:         era = BCE;
michael@0:         year = 1 - eyear;
michael@0:     } else {
michael@0:         era = CE;
michael@0:         year = eyear;
michael@0:     }
michael@0: 
michael@0:     internalSet(UCAL_EXTENDED_YEAR, eyear);
michael@0:     internalSet(UCAL_ERA, era);
michael@0:     internalSet(UCAL_YEAR, year);
michael@0:     internalSet(UCAL_MONTH, month);
michael@0:     internalSet(UCAL_DATE, day);
michael@0:     internalSet(UCAL_DAY_OF_YEAR, (30 * month) + day);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * The system maintains a static default century start date and Year.  They are
michael@0:  * initialized the first time they are used.  Once the system default century date 
michael@0:  * and year are set, they do not change.
michael@0:  */
michael@0: static UDate           gSystemDefaultCenturyStart       = DBL_MIN;
michael@0: static int32_t         gSystemDefaultCenturyStartYear   = -1;
michael@0: static icu::UInitOnce  gSystemDefaultCenturyInit        = U_INITONCE_INITIALIZER;
michael@0: 
michael@0: 
michael@0: static void U_CALLCONV initializeSystemDefaultCentury() {
michael@0:     UErrorCode status = U_ZERO_ERROR;
michael@0:     CopticCalendar calendar(Locale("@calendar=coptic"), status);
michael@0:     if (U_SUCCESS(status)) {
michael@0:         calendar.setTime(Calendar::getNow(), status);
michael@0:         calendar.add(UCAL_YEAR, -80, status);
michael@0:         gSystemDefaultCenturyStart = calendar.getTime(status);
michael@0:         gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status);
michael@0:     }
michael@0:     // We have no recourse upon failure unless we want to propagate the failure
michael@0:     // out.
michael@0: }
michael@0: 
michael@0: UDate
michael@0: CopticCalendar::defaultCenturyStart() const
michael@0: {
michael@0:     // lazy-evaluate systemDefaultCenturyStart
michael@0:     umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
michael@0:     return gSystemDefaultCenturyStart;
michael@0: }
michael@0: 
michael@0: int32_t
michael@0: CopticCalendar::defaultCenturyStartYear() const
michael@0: {
michael@0:     // lazy-evaluate systemDefaultCenturyStart
michael@0:     umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
michael@0:     return gSystemDefaultCenturyStartYear;
michael@0: }
michael@0: 
michael@0: 
michael@0: int32_t
michael@0: CopticCalendar::getJDEpochOffset() const
michael@0: {
michael@0:     return COPTIC_JD_EPOCH_OFFSET;
michael@0: }
michael@0: 
michael@0: 
michael@0: #if 0
michael@0: // We do not want to introduce this API in ICU4C.
michael@0: // It was accidentally introduced in ICU4J as a public API.
michael@0: 
michael@0: //-------------------------------------------------------------------------
michael@0: // Calendar system Conversion methods...
michael@0: //-------------------------------------------------------------------------
michael@0: 
michael@0: int32_t
michael@0: CopticCalendar::copticToJD(int32_t year, int32_t month, int32_t day)
michael@0: {
michael@0:     return CECalendar::ceToJD(year, month, day, COPTIC_JD_EPOCH_OFFSET);
michael@0: }
michael@0: #endif
michael@0: 
michael@0: U_NAMESPACE_END
michael@0: 
michael@0: #endif /* #if !UCONFIG_NO_FORMATTING */
michael@0: //eof