Check in the pristine copy of ICU 4.6...

icu46/source/i18n/buddhcal.cpp

+/*
+*******************************************************************************
+* Copyright (C) 2003-2008, 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.
+    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);
+        if (fgSystemDefaultCenturyStart == fgSystemDefaultCentury) {
+            fgSystemDefaultCenturyStartYear = newYear;
+            fgSystemDefaultCenturyStart = newStart;
+        }
+        umtx_unlock(NULL);
+    }
+    // We have no recourse upon failure unless we want to propagate the failure
+    // out.
+}
+
+
+U_NAMESPACE_END
+
+#endif