182 lines
5.2 KiB
C++
182 lines
5.2 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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* Copyright (C) 2003-2013, International Business Machines Corporation and *
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* others. All Rights Reserved. *
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*******************************************************************************
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*
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* File BUDDHCAL.CPP
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*
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* Modification History:
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* 05/13/2003 srl copied from gregocal.cpp
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*
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*/
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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#include "buddhcal.h"
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#include "unicode/gregocal.h"
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#include "umutex.h"
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#include <float.h>
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U_NAMESPACE_BEGIN
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(BuddhistCalendar)
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//static const int32_t kMaxEra = 0; // only 1 era
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static const int32_t kBuddhistEraStart = -543; // 544 BC (Gregorian)
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static const int32_t kGregorianEpoch = 1970; // used as the default value of EXTENDED_YEAR
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BuddhistCalendar::BuddhistCalendar(const Locale& aLocale, UErrorCode& success)
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: GregorianCalendar(aLocale, success)
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{
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setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
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}
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BuddhistCalendar::~BuddhistCalendar()
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{
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}
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BuddhistCalendar::BuddhistCalendar(const BuddhistCalendar& source)
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: GregorianCalendar(source)
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{
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}
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BuddhistCalendar& BuddhistCalendar::operator= ( const BuddhistCalendar& right)
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{
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GregorianCalendar::operator=(right);
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return *this;
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}
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BuddhistCalendar* BuddhistCalendar::clone() const
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{
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return new BuddhistCalendar(*this);
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}
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const char *BuddhistCalendar::getType() const
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{
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return "buddhist";
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}
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int32_t BuddhistCalendar::handleGetExtendedYear()
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{
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// EXTENDED_YEAR in BuddhistCalendar is a Gregorian year.
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// The default value of EXTENDED_YEAR is 1970 (Buddhist 2513)
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int32_t year;
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if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
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year = internalGet(UCAL_EXTENDED_YEAR, kGregorianEpoch);
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} else {
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// extended year is a gregorian year, where 1 = 1AD, 0 = 1BC, -1 = 2BC, etc
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year = internalGet(UCAL_YEAR, kGregorianEpoch - kBuddhistEraStart)
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+ kBuddhistEraStart;
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}
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return year;
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}
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int32_t BuddhistCalendar::handleComputeMonthStart(int32_t eyear, int32_t month,
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UBool useMonth) const
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{
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return GregorianCalendar::handleComputeMonthStart(eyear, month, useMonth);
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}
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void BuddhistCalendar::handleComputeFields(int32_t julianDay, UErrorCode& status)
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{
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GregorianCalendar::handleComputeFields(julianDay, status);
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int32_t y = internalGet(UCAL_EXTENDED_YEAR) - kBuddhistEraStart;
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internalSet(UCAL_ERA, 0);
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internalSet(UCAL_YEAR, y);
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}
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int32_t BuddhistCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
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{
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if(field == UCAL_ERA) {
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return BE;
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} else {
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return GregorianCalendar::handleGetLimit(field,limitType);
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}
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}
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#if 0
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void BuddhistCalendar::timeToFields(UDate theTime, UBool quick, UErrorCode& status)
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{
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//Calendar::timeToFields(theTime, quick, status);
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int32_t era = internalGet(UCAL_ERA);
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int32_t year = internalGet(UCAL_YEAR);
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if(era == GregorianCalendar::BC) {
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year = 1-year;
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era = BuddhistCalendar::BE;
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} else if(era == GregorianCalendar::AD) {
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era = BuddhistCalendar::BE;
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} else {
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status = U_INTERNAL_PROGRAM_ERROR;
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}
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year = year - kBuddhistEraStart;
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internalSet(UCAL_ERA, era);
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internalSet(UCAL_YEAR, year);
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}
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#endif
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/**
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* The system maintains a static default century start date. This is initialized
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* the first time it is used. Once the system default century date and year
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* are set, they do not change.
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*/
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static UDate gSystemDefaultCenturyStart = DBL_MIN;
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static int32_t gSystemDefaultCenturyStartYear = -1;
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static icu::UInitOnce gBCInitOnce = U_INITONCE_INITIALIZER;
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UBool BuddhistCalendar::haveDefaultCentury() const
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{
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return TRUE;
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}
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static void U_CALLCONV
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initializeSystemDefaultCentury()
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{
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// initialize systemDefaultCentury and systemDefaultCenturyYear based
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// on the current time. They'll be set to 80 years before
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// the current time.
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UErrorCode status = U_ZERO_ERROR;
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BuddhistCalendar calendar(Locale("@calendar=buddhist"),status);
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if (U_SUCCESS(status)) {
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calendar.setTime(Calendar::getNow(), status);
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calendar.add(UCAL_YEAR, -80, status);
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UDate newStart = calendar.getTime(status);
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int32_t newYear = calendar.get(UCAL_YEAR, status);
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gSystemDefaultCenturyStartYear = newYear;
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gSystemDefaultCenturyStart = newStart;
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}
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// We have no recourse upon failure unless we want to propagate the failure
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// out.
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}
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UDate BuddhistCalendar::defaultCenturyStart() const
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{
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// lazy-evaluate systemDefaultCenturyStart and systemDefaultCenturyStartYear
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umtx_initOnce(gBCInitOnce, &initializeSystemDefaultCentury);
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return gSystemDefaultCenturyStart;
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}
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int32_t BuddhistCalendar::defaultCenturyStartYear() const
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{
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// lazy-evaluate systemDefaultCenturyStartYear and systemDefaultCenturyStart
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umtx_initOnce(gBCInitOnce, &initializeSystemDefaultCentury);
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return gSystemDefaultCenturyStartYear;
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}
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U_NAMESPACE_END
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#endif
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