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/*
*******************************************************************************
* Copyright (C) 2003-2007, 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
*
*/
#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;
}
Calendar* TaiwanCalendar::clone(void) const
{
return new TaiwanCalendar(*this);
}
const char *TaiwanCalendar::getType() const
{
return "taiwan";
}
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
// default century
const UDate TaiwanCalendar::fgSystemDefaultCentury = DBL_MIN;
const int32_t TaiwanCalendar::fgSystemDefaultCenturyYear = -1;
UDate TaiwanCalendar::fgSystemDefaultCenturyStart = DBL_MIN;
int32_t TaiwanCalendar::fgSystemDefaultCenturyStartYear = -1;
UBool TaiwanCalendar::haveDefaultCentury() const
{
return TRUE;
}
UDate TaiwanCalendar::defaultCenturyStart() const
{
return internalGetDefaultCenturyStart();
}
int32_t TaiwanCalendar::defaultCenturyStartYear() const
{
return internalGetDefaultCenturyStartYear();
}
UDate
TaiwanCalendar::internalGetDefaultCenturyStart() const
{
// lazy-evaluate systemDefaultCenturyStart
UBool needsUpdate;
UMTX_CHECK(NULL, (fgSystemDefaultCenturyStart == fgSystemDefaultCentury), needsUpdate);
if (needsUpdate) {
initializeSystemDefaultCentury();
}
// use defaultCenturyStart unless it's the flag value;
// then use systemDefaultCenturyStart
return fgSystemDefaultCenturyStart;
}
int32_t
TaiwanCalendar::internalGetDefaultCenturyStartYear() const
{
// lazy-evaluate systemDefaultCenturyStartYear
UBool needsUpdate;
UMTX_CHECK(NULL, (fgSystemDefaultCenturyStart == fgSystemDefaultCentury), needsUpdate);
if (needsUpdate) {
initializeSystemDefaultCentury();
}
// use defaultCenturyStart unless it's the flag value;
// then use systemDefaultCenturyStartYear
return fgSystemDefaultCenturyStartYear;
}
void
TaiwanCalendar::initializeSystemDefaultCentury()
{
// initialize systemDefaultCentury and systemDefaultCenturyYear based
// on the current time. They'll be set to 80 years before
// the current time.
// No point in locking as it should be idempotent.
if (fgSystemDefaultCenturyStart == fgSystemDefaultCentury)
{
UErrorCode status = U_ZERO_ERROR;
TaiwanCalendar calendar(Locale("@calendar=Taiwan"),status);
if (U_SUCCESS(status))
{
calendar.setTime(Calendar::getNow(), status);
calendar.add(UCAL_YEAR, -80, status);
UDate newStart = calendar.getTime(status);
int32_t newYear = calendar.get(UCAL_YEAR, status);
{
umtx_lock(NULL);
fgSystemDefaultCenturyStart = newStart;
fgSystemDefaultCenturyStartYear = newYear;
umtx_unlock(NULL);
}
}
// We have no recourse upon failure unless we want to propagate the failure
// out.
}
}
U_NAMESPACE_END
#endif
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