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121 lines
3.2 KiB
C++
121 lines
3.2 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 TAIWNCAL.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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* 06/29/2007 srl copied from buddhcal.cpp
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* 05/12/2008 jce modified to use calendar=roc per CLDR
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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 "taiwncal.h"
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#include "gregoimp.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(TaiwanCalendar)
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static const int32_t kTaiwanEraStart = 1911; // 1911 (Gregorian)
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static const int32_t kGregorianEpoch = 1970;
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TaiwanCalendar::TaiwanCalendar(const Locale& aLocale, UErrorCode& success)
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: GregorianCalendar(aLocale, success)
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{
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}
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TaiwanCalendar::~TaiwanCalendar()
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{
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}
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TaiwanCalendar::TaiwanCalendar(const TaiwanCalendar& source)
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: GregorianCalendar(source)
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{
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}
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TaiwanCalendar* TaiwanCalendar::clone() const
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{
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return new TaiwanCalendar(*this);
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}
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const char *TaiwanCalendar::getType() const
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{
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return "roc";
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}
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int32_t TaiwanCalendar::handleGetExtendedYear(UErrorCode& status)
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{
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if (U_FAILURE(status)) {
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return 0;
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}
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// EXTENDED_YEAR in TaiwanCalendar is a Gregorian year
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// The default value of EXTENDED_YEAR is 1970 (Minguo 59)
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if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR
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&& newerField(UCAL_EXTENDED_YEAR, UCAL_ERA) == UCAL_EXTENDED_YEAR) {
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return internalGet(UCAL_EXTENDED_YEAR, kGregorianEpoch);
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}
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int32_t era = internalGet(UCAL_ERA, MINGUO);
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int32_t year = internalGet(UCAL_YEAR, 1);
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switch (era) {
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case MINGUO:
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if (uprv_add32_overflow(year, kTaiwanEraStart, &year)) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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return year;
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case BEFORE_MINGUO:
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if (uprv_add32_overflow(1 + kTaiwanEraStart, -year, &year)) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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return year;
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default:
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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}
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void TaiwanCalendar::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) - kTaiwanEraStart;
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if(y>0) {
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internalSet(UCAL_ERA, MINGUO);
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internalSet(UCAL_YEAR, y);
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} else {
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internalSet(UCAL_ERA, BEFORE_MINGUO);
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internalSet(UCAL_YEAR, 1-y);
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}
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}
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int32_t TaiwanCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
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{
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if(field != UCAL_ERA) {
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return GregorianCalendar::handleGetLimit(field,limitType);
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}
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if (limitType == UCAL_LIMIT_MINIMUM || limitType == UCAL_LIMIT_GREATEST_MINIMUM) {
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return BEFORE_MINGUO;
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}
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return MINGUO;
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}
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IMPL_SYSTEM_DEFAULT_CENTURY(TaiwanCalendar, "@calendar=roc")
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U_NAMESPACE_END
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#endif
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