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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 "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)
{
setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
}
TaiwanCalendar::~TaiwanCalendar()
{
}
TaiwanCalendar::TaiwanCalendar(const TaiwanCalendar& source)
: GregorianCalendar(source)
{
}
TaiwanCalendar& TaiwanCalendar::operator= ( const TaiwanCalendar& right)
{
GregorianCalendar::operator=(right);
return *this;
}
TaiwanCalendar* TaiwanCalendar::clone() const
{
return new TaiwanCalendar(*this);
}
const char *TaiwanCalendar::getType() const
{
return "roc";
}
int32_t TaiwanCalendar::handleGetExtendedYear()
{
// EXTENDED_YEAR in TaiwanCalendar is a Gregorian year
// The default value of EXTENDED_YEAR is 1970 (Minguo 59)
int32_t year = kGregorianEpoch;
if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR
&& newerField(UCAL_EXTENDED_YEAR, UCAL_ERA) == UCAL_EXTENDED_YEAR) {
year = internalGet(UCAL_EXTENDED_YEAR, kGregorianEpoch);
} else {
int32_t era = internalGet(UCAL_ERA, MINGUO);
if(era == MINGUO) {
year = internalGet(UCAL_YEAR, 1) + kTaiwanEraStart;
} else if(era == BEFORE_MINGUO) {
year = 1 - internalGet(UCAL_YEAR, 1) + kTaiwanEraStart;
}
}
return year;
}
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) {
if(limitType == UCAL_LIMIT_MINIMUM || limitType == UCAL_LIMIT_GREATEST_MINIMUM) {
return BEFORE_MINGUO;
} else {
return MINGUO;
}
} else {
return GregorianCalendar::handleGetLimit(field,limitType);
}
}
#if 0
void TaiwanCalendar::timeToFields(UDate theTime, UBool quick, UErrorCode& status)
{
//Calendar::timeToFields(theTime, quick, status);
int32_t era = internalGet(UCAL_ERA);
int32_t year = internalGet(UCAL_YEAR);
if(era == GregorianCalendar::BC) {
year = 1-year;
era = TaiwanCalendar::MINGUO;
} else if(era == GregorianCalendar::AD) {
era = TaiwanCalendar::MINGUO;
} else {
status = U_INTERNAL_PROGRAM_ERROR;
}
year = year - kTaiwanEraStart;
internalSet(UCAL_ERA, era);
internalSet(UCAL_YEAR, year);
}
#endif
/**
* The system maintains a static default century start date and Year. They are
* initialized the first time they are used. Once the system default century date
* and year are set, they do not change.
*/
static UDate gSystemDefaultCenturyStart = DBL_MIN;
static int32_t gSystemDefaultCenturyStartYear = -1;
static icu::UInitOnce gSystemDefaultCenturyInit {};
UBool TaiwanCalendar::haveDefaultCentury() const
{
return true;
}
static void U_CALLCONV initializeSystemDefaultCentury()
{
// initialize systemDefaultCentury and systemDefaultCenturyYear based
// on the current time. They'll be set to 80 years before
// the current time.
UErrorCode status = U_ZERO_ERROR;
TaiwanCalendar calendar(Locale("@calendar=roc"),status);
if (U_SUCCESS(status))
{
calendar.setTime(Calendar::getNow(), status);
calendar.add(UCAL_YEAR, -80, status);
gSystemDefaultCenturyStart = calendar.getTime(status);
gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status);
}
// We have no recourse upon failure unless we want to propagate the failure
// out.
}
UDate TaiwanCalendar::defaultCenturyStart() const {
// lazy-evaluate systemDefaultCenturyStart
umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
return gSystemDefaultCenturyStart;
}
int32_t TaiwanCalendar::defaultCenturyStartYear() const {
// lazy-evaluate systemDefaultCenturyStartYear
umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
return gSystemDefaultCenturyStartYear;
}
U_NAMESPACE_END
#endif
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