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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2003-2013, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*
* File TAIWNCAL.CPP
*
* Modification History:
* 05/13/2003 srl copied from gregocal.cpp
* 06/29/2007 srl copied from buddhcal.cpp
* 05/12/2008 jce modified to use calendar=roc per CLDR
*
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "taiwncal.h"
#include "gregoimp.h"
#include "unicode/gregocal.h"
#include "umutex.h"
#include <float.h>
U_NAMESPACE_BEGIN
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TaiwanCalendar)
static const int32_t kTaiwanEraStart = 1911; // 1911 (Gregorian)
static const int32_t kGregorianEpoch = 1970;
TaiwanCalendar::TaiwanCalendar(const Locale& aLocale, UErrorCode& success)
: GregorianCalendar(aLocale, success)
{
}
TaiwanCalendar::~TaiwanCalendar()
{
}
TaiwanCalendar::TaiwanCalendar(const TaiwanCalendar& source)
: GregorianCalendar(source)
{
}
TaiwanCalendar* TaiwanCalendar::clone() const
{
return new TaiwanCalendar(*this);
}
const char *TaiwanCalendar::getType() const
{
return "roc";
}
int32_t TaiwanCalendar::handleGetExtendedYear(UErrorCode& status)
{
if (U_FAILURE(status)) {
return 0;
}
// EXTENDED_YEAR in TaiwanCalendar is a Gregorian year
// The default value of EXTENDED_YEAR is 1970 (Minguo 59)
if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR
&& newerField(UCAL_EXTENDED_YEAR, UCAL_ERA) == UCAL_EXTENDED_YEAR) {
return internalGet(UCAL_EXTENDED_YEAR, kGregorianEpoch);
}
int32_t era = internalGet(UCAL_ERA, MINGUO);
int32_t year = internalGet(UCAL_YEAR, 1);
switch (era) {
case MINGUO:
if (uprv_add32_overflow(year, kTaiwanEraStart, &year)) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
return year;
case BEFORE_MINGUO:
if (uprv_add32_overflow(1 + kTaiwanEraStart, -year, &year)) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
return year;
default:
status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
}
void TaiwanCalendar::handleComputeFields(int32_t julianDay, UErrorCode& status)
{
GregorianCalendar::handleComputeFields(julianDay, status);
int32_t y = internalGet(UCAL_EXTENDED_YEAR) - kTaiwanEraStart;
if(y>0) {
internalSet(UCAL_ERA, MINGUO);
internalSet(UCAL_YEAR, y);
} else {
internalSet(UCAL_ERA, BEFORE_MINGUO);
internalSet(UCAL_YEAR, 1-y);
}
}
int32_t TaiwanCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
{
if(field != UCAL_ERA) {
return GregorianCalendar::handleGetLimit(field,limitType);
}
if (limitType == UCAL_LIMIT_MINIMUM || limitType == UCAL_LIMIT_GREATEST_MINIMUM) {
return BEFORE_MINGUO;
}
return MINGUO;
}
IMPL_SYSTEM_DEFAULT_CENTURY(TaiwanCalendar, "@calendar=roc")
U_NAMESPACE_END
#endif
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