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/*
*******************************************************************************
* Copyright (C) 2003 - 2009, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "umutex.h"
#include "ethpccal.h"
#include "cecal.h"
#include <float.h>
U_NAMESPACE_BEGIN
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(EthiopicCalendar)
//static const int32_t JD_EPOCH_OFFSET_AMETE_ALEM = -285019;
static const int32_t JD_EPOCH_OFFSET_AMETE_MIHRET = 1723856;
static const int32_t AMETE_MIHRET_DELTA = 5500; // 5501 - 1 (Amete Alem 5501 = Amete Mihret 1)
//-------------------------------------------------------------------------
// Constructors...
//-------------------------------------------------------------------------
EthiopicCalendar::EthiopicCalendar(const Locale& aLocale,
UErrorCode& success,
EEraType type /*= AMETE_MIHRET_ERA*/)
: CECalendar(aLocale, success),
eraType(type)
{
}
EthiopicCalendar::EthiopicCalendar(const EthiopicCalendar& other)
: CECalendar(other),
eraType(other.eraType)
{
}
EthiopicCalendar::~EthiopicCalendar()
{
}
Calendar*
EthiopicCalendar::clone() const
{
return new EthiopicCalendar(*this);
}
const char *
EthiopicCalendar::getType() const
{
if (isAmeteAlemEra()) {
return "ethiopic-amete-alem";
}
return "ethiopic";
}
void
EthiopicCalendar::setAmeteAlemEra(UBool onOff)
{
eraType = onOff ? AMETE_ALEM_ERA : AMETE_MIHRET_ERA;
}
UBool
EthiopicCalendar::isAmeteAlemEra() const
{
return (eraType == AMETE_ALEM_ERA);
}
//-------------------------------------------------------------------------
// Calendar framework
//-------------------------------------------------------------------------
int32_t
EthiopicCalendar::handleGetExtendedYear()
{
// Ethiopic calendar uses EXTENDED_YEAR aligned to
// Amelete Hihret year always.
int32_t eyear;
if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
eyear = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1
} else if (isAmeteAlemEra()) {
eyear = internalGet(UCAL_YEAR, 1 + AMETE_MIHRET_DELTA)
- AMETE_MIHRET_DELTA; // Default to year 1 of Amelete Mihret
} else {
// The year defaults to the epoch start, the era to AMETE_MIHRET
int32_t era = internalGet(UCAL_ERA, AMETE_MIHRET);
if (era == AMETE_MIHRET) {
eyear = internalGet(UCAL_YEAR, 1); // Default to year 1
} else {
eyear = internalGet(UCAL_YEAR, 1) - AMETE_MIHRET_DELTA;
}
}
return eyear;
}
void
EthiopicCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/)
{
int32_t eyear, month, day, era, year;
jdToCE(julianDay, getJDEpochOffset(), eyear, month, day);
if (isAmeteAlemEra()) {
era = AMETE_ALEM;
year = eyear + AMETE_MIHRET_DELTA;
} else {
if (eyear > 0) {
era = AMETE_MIHRET;
year = eyear;
} else {
era = AMETE_ALEM;
year = eyear + AMETE_MIHRET_DELTA;
}
}
internalSet(UCAL_EXTENDED_YEAR, eyear);
internalSet(UCAL_ERA, era);
internalSet(UCAL_YEAR, year);
internalSet(UCAL_MONTH, month);
internalSet(UCAL_DATE, day);
internalSet(UCAL_DAY_OF_YEAR, (30 * month) + day);
}
int32_t
EthiopicCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
{
if (isAmeteAlemEra() && field == UCAL_ERA) {
return 0; // Only one era in this mode, era is always 0
}
return CECalendar::handleGetLimit(field, limitType);
}
const UDate EthiopicCalendar::fgSystemDefaultCentury = DBL_MIN;
const int32_t EthiopicCalendar::fgSystemDefaultCenturyYear = -1;
UDate EthiopicCalendar::fgSystemDefaultCenturyStart = DBL_MIN;
int32_t EthiopicCalendar::fgSystemDefaultCenturyStartYear = -1;
UDate
EthiopicCalendar::defaultCenturyStart() const
{
initializeSystemDefaultCentury();
return fgSystemDefaultCenturyStart;
}
int32_t
EthiopicCalendar::defaultCenturyStartYear() const
{
initializeSystemDefaultCentury();
if (isAmeteAlemEra()) {
return fgSystemDefaultCenturyStartYear + AMETE_MIHRET_DELTA;
}
return fgSystemDefaultCenturyStartYear;
}
void
EthiopicCalendar::initializeSystemDefaultCentury()
{
// lazy-evaluate systemDefaultCenturyStart
UBool needsUpdate;
UMTX_CHECK(NULL, (fgSystemDefaultCenturyStart == fgSystemDefaultCentury), needsUpdate);
if (!needsUpdate) {
return;
}
UErrorCode status = U_ZERO_ERROR;
EthiopicCalendar calendar(Locale("@calendar=ethiopic"), 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);
fgSystemDefaultCenturyStartYear = newYear;
fgSystemDefaultCenturyStart = newStart;
umtx_unlock(NULL);
}
}
// We have no recourse upon failure unless we want to propagate the failure
// out.
}
int32_t
EthiopicCalendar::getJDEpochOffset() const
{
return JD_EPOCH_OFFSET_AMETE_MIHRET;
}
#if 0
// We do not want to introduce this API in ICU4C.
// It was accidentally introduced in ICU4J as a public API.
//-------------------------------------------------------------------------
// Calendar system Conversion methods...
//-------------------------------------------------------------------------
int32_t
EthiopicCalendar::ethiopicToJD(int32_t year, int32_t month, int32_t date)
{
return ceToJD(year, month, date, JD_EPOCH_OFFSET_AMETE_MIHRET);
}
#endif
U_NAMESPACE_END
#endif
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