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/*
*******************************************************************************
* Copyright (C) 2003-2007, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*
* File BUDDHCAL.CPP
*
* Modification History:
* 05/13/2003 srl copied from gregocal.cpp
*
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "buddhcal.h"
#include "unicode/gregocal.h"
#include "umutex.h"
#include <float.h>
U_NAMESPACE_BEGIN
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(BuddhistCalendar)
static const int32_t kMaxEra = 0; // only 1 era
static const int32_t kBuddhistEraStart = -543; // 544 BC (Gregorian)
static const int32_t kGregorianEpoch = 1970; // used as the default value of EXTENDED_YEAR
BuddhistCalendar::BuddhistCalendar(const Locale& aLocale, UErrorCode& success)
: GregorianCalendar(aLocale, success)
{
setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
}
BuddhistCalendar::~BuddhistCalendar()
{
}
BuddhistCalendar::BuddhistCalendar(const BuddhistCalendar& source)
: GregorianCalendar(source)
{
}
BuddhistCalendar& BuddhistCalendar::operator= ( const BuddhistCalendar& right)
{
GregorianCalendar::operator=(right);
return *this;
}
Calendar* BuddhistCalendar::clone(void) const
{
return new BuddhistCalendar(*this);
}
const char *BuddhistCalendar::getType() const
{
return "buddhist";
}
int32_t BuddhistCalendar::handleGetExtendedYear()
{
// EXTENDED_YEAR in BuddhistCalendar is a Gregorian year.
// The default value of EXTENDED_YEAR is 1970 (Buddhist 2513)
int32_t year;
if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
year = internalGet(UCAL_EXTENDED_YEAR, kGregorianEpoch);
} else {
// extended year is a gregorian year, where 1 = 1AD, 0 = 1BC, -1 = 2BC, etc
year = internalGet(UCAL_YEAR, kGregorianEpoch - kBuddhistEraStart)
+ kBuddhistEraStart;
}
return year;
}
int32_t BuddhistCalendar::handleComputeMonthStart(int32_t eyear, int32_t month,
UBool useMonth) const
{
return GregorianCalendar::handleComputeMonthStart(eyear, month, useMonth);
}
void BuddhistCalendar::handleComputeFields(int32_t julianDay, UErrorCode& status)
{
GregorianCalendar::handleComputeFields(julianDay, status);
int32_t y = internalGet(UCAL_EXTENDED_YEAR) - kBuddhistEraStart;
internalSet(UCAL_ERA, 0);
internalSet(UCAL_YEAR, y);
}
int32_t BuddhistCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
{
if(field == UCAL_ERA) {
return BE;
} else {
return GregorianCalendar::handleGetLimit(field,limitType);
}
}
#if 0
void BuddhistCalendar::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 = BuddhistCalendar::BE;
} else if(era == GregorianCalendar::AD) {
era = BuddhistCalendar::BE;
} else {
status = U_INTERNAL_PROGRAM_ERROR;
}
year = year - kBuddhistEraStart;
internalSet(UCAL_ERA, era);
internalSet(UCAL_YEAR, year);
}
#endif
// default century
const UDate BuddhistCalendar::fgSystemDefaultCentury = DBL_MIN;
const int32_t BuddhistCalendar::fgSystemDefaultCenturyYear = -1;
UDate BuddhistCalendar::fgSystemDefaultCenturyStart = DBL_MIN;
int32_t BuddhistCalendar::fgSystemDefaultCenturyStartYear = -1;
UBool BuddhistCalendar::haveDefaultCentury() const
{
return TRUE;
}
UDate BuddhistCalendar::defaultCenturyStart() const
{
return internalGetDefaultCenturyStart();
}
int32_t BuddhistCalendar::defaultCenturyStartYear() const
{
return internalGetDefaultCenturyStartYear();
}
UDate
BuddhistCalendar::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
BuddhistCalendar::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
BuddhistCalendar::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;
BuddhistCalendar calendar(Locale("@calendar=buddhist"),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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