/*
- * Copyright (C) 2003-2004, International Business Machines Corporation
- * and others. All Rights Reserved.
- ******************************************************************************
- *
- * File ISLAMCAL.H
- *
- * Modification History:
- *
- * Date Name Description
- * 10/14/2003 srl ported from java IslamicCalendar
- *****************************************************************************
- */
+******************************************************************************
+* Copyright (C) 2003-2010, International Business Machines Corporation
+* and others. All Rights Reserved.
+******************************************************************************
+*
+* File ISLAMCAL.H
+*
+* Modification History:
+*
+* Date Name Description
+* 10/14/2003 srl ported from java IslamicCalendar
+*****************************************************************************
+*/
#include "islamcal.h"
#if !UCONFIG_NO_FORMATTING
-#include "mutex.h"
+#include "umutex.h"
#include <float.h>
#include "gregoimp.h" // Math
#include "astro.h" // CalendarAstronomer
# include <stdarg.h>
static void debug_islamcal_loc(const char *f, int32_t l)
{
- fprintf(stderr, "%s:%d: ", f, l);
+ fprintf(stderr, "%s:%d: ", f, l);
}
static void debug_islamcal_msg(const char *pat, ...)
{
- va_list ap;
- va_start(ap, pat);
- vfprintf(stderr, pat, ap);
- fflush(stderr);
+ va_list ap;
+ va_start(ap, pat);
+ vfprintf(stderr, pat, ap);
+ fflush(stderr);
}
// must use double parens, i.e.: U_DEBUG_ISLAMCAL_MSG(("four is: %d",4));
#define U_DEBUG_ISLAMCAL_MSG(x) {debug_islamcal_loc(__FILE__,__LINE__);debug_islamcal_msg x;}
// --- The cache --
// cache of months
static UMTX astroLock = 0; // pod bay door lock
-static CalendarCache *gMonthCache = NULL;
-static CalendarAstronomer *gIslamicCalendarAstro = NULL;
+static U_NAMESPACE_QUALIFIER CalendarCache *gMonthCache = NULL;
+static U_NAMESPACE_QUALIFIER CalendarAstronomer *gIslamicCalendarAstro = NULL;
U_CDECL_BEGIN
static UBool calendar_islamic_cleanup(void) {
//-------------------------------------------------------------------------
const char *IslamicCalendar::getType() const {
- if(civil==CIVIL) {
- return "islamic-civil";
- } else {
- return "islamic";
- }
+ if(civil==CIVIL) {
+ return "islamic-civil";
+ } else {
+ return "islamic";
+ }
}
Calendar* IslamicCalendar::clone() const {
- return new IslamicCalendar(*this);
+ return new IslamicCalendar(*this);
}
IslamicCalendar::IslamicCalendar(const Locale& aLocale, UErrorCode& success, ECivil beCivil)
- : Calendar(TimeZone::createDefault(), aLocale, success),
- civil(beCivil)
+: Calendar(TimeZone::createDefault(), aLocale, success),
+civil(beCivil)
{
- setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
+ setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
}
IslamicCalendar::IslamicCalendar(const IslamicCalendar& other) : Calendar(other), civil(other.civil) {
}
/**
- * Determines whether this object uses the fixed-cycle Islamic civil calendar
- * or an approximation of the religious, astronomical calendar.
- *
- * @param beCivil <code>true</code> to use the civil calendar,
- * <code>false</code> to use the astronomical calendar.
- * @draft ICU 2.4
- */
+* Determines whether this object uses the fixed-cycle Islamic civil calendar
+* or an approximation of the religious, astronomical calendar.
+*
+* @param beCivil <code>true</code> to use the civil calendar,
+* <code>false</code> to use the astronomical calendar.
+* @draft ICU 2.4
+*/
void IslamicCalendar::setCivil(ECivil beCivil, UErrorCode &status)
{
- if (civil != beCivil) {
- // The fields of the calendar will become invalid, because the calendar
- // rules are different
- UDate m = getTimeInMillis(status);
- civil = beCivil;
- clear();
- setTimeInMillis(m, status);
- }
+ if (civil != beCivil) {
+ // The fields of the calendar will become invalid, because the calendar
+ // rules are different
+ UDate m = getTimeInMillis(status);
+ civil = beCivil;
+ clear();
+ setTimeInMillis(m, status);
+ }
}
-
+
/**
- * Returns <code>true</code> if this object is using the fixed-cycle civil
- * calendar, or <code>false</code> if using the religious, astronomical
- * calendar.
- * @draft ICU 2.4
- */
+* Returns <code>true</code> if this object is using the fixed-cycle civil
+* calendar, or <code>false</code> if using the religious, astronomical
+* calendar.
+* @draft ICU 2.4
+*/
UBool IslamicCalendar::isCivil() {
- return (civil == CIVIL);
+ return (civil == CIVIL);
}
-
+
//-------------------------------------------------------------------------
// Minimum / Maximum access functions
//-------------------------------------------------------------------------
+// Note: Current IslamicCalendar implementation does not work
+// well with negative years.
+
static const int32_t LIMITS[UCAL_FIELD_COUNT][4] = {
- // Minimum Greatest Least Maximum
- // Minimum Maximum
- { 0, 0, 0, 0 }, // ERA
- { 1, 1, 5000000, 5000000 }, // YEAR
- { 0, 0, 11, 11 }, // MONTH
- { 1, 1, 51, 52 }, // WEEK_OF_YEAR
- { 0, 0, 5, 6 }, // WEEK_OF_MONTH
- { 1, 1, 29, 30 }, // DAY_OF_MONTH
- { 1, 1, 354, 355 }, // DAY_OF_YEAR
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK
- { -1, -1, 4, 5 }, // DAY_OF_WEEK_IN_MONTH
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET
- { 1, 1, 5000001, 5000001 }, // YEAR_WOY
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL
- { 1, 1, 5000000, 5000000 }, // EXTENDED_YEAR
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY
- {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1} // MILLISECONDS_IN_DAY
+ // Minimum Greatest Least Maximum
+ // Minimum Maximum
+ { 0, 0, 0, 0}, // ERA
+ { 1, 1, 5000000, 5000000}, // YEAR
+ { 0, 0, 11, 11}, // MONTH
+ { 1, 1, 50, 51}, // WEEK_OF_YEAR
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH
+ { 1, 1, 29, 31}, // DAY_OF_MONTH (**** SB 30 ****)
+ { 1, 1, 354, 355}, // DAY_OF_YEAR
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK
+ { -1, -1, 5, 5}, // DAY_OF_WEEK_IN_MONTH
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET
+ { 1, 1, 5000000, 5000000}, // YEAR_WOY
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL
+ { 1, 1, 5000000, 5000000}, // EXTENDED_YEAR
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECONDS_IN_DAY
+ {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // IS_LEAP_MONTH
};
/**
- * @draft ICU 2.4
- */
+* @draft ICU 2.4
+*/
int32_t IslamicCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const {
- return LIMITS[field][limitType];
+ return LIMITS[field][limitType];
}
//-------------------------------------------------------------------------
//
/**
- * Determine whether a year is a leap year in the Islamic civil calendar
- */
+* Determine whether a year is a leap year in the Islamic civil calendar
+*/
UBool IslamicCalendar::civilLeapYear(int32_t year)
{
- return (14 + 11 * year) % 30 < 11;
+ return (14 + 11 * year) % 30 < 11;
}
-
+
/**
- * Return the day # on which the given year starts. Days are counted
- * from the Hijri epoch, origin 0.
- */
+* Return the day # on which the given year starts. Days are counted
+* from the Hijri epoch, origin 0.
+*/
int32_t IslamicCalendar::yearStart(int32_t year) {
- if (civil == CIVIL) {
- return (year-1)*354 + Math::floorDivide((3+11*year),30);
- } else {
- return trueMonthStart(12*(year-1));
- }
+ if (civil == CIVIL) {
+ return (year-1)*354 + ClockMath::floorDivide((3+11*year),30);
+ } else {
+ return trueMonthStart(12*(year-1));
+ }
}
-
+
/**
- * Return the day # on which the given month starts. Days are counted
- * from the Hijri epoch, origin 0.
- *
- * @param year The hijri year
- * @param year The hijri month, 0-based
- */
+* Return the day # on which the given month starts. Days are counted
+* from the Hijri epoch, origin 0.
+*
+* @param year The hijri year
+* @param year The hijri month, 0-based
+*/
int32_t IslamicCalendar::monthStart(int32_t year, int32_t month) const {
- if (civil == CIVIL) {
- return (int32_t)uprv_ceil(29.5*month)
- + (year-1)*354 + (int32_t)Math::floorDivide((3+11*year),30);
- } else {
- return trueMonthStart(12*(year-1) + month);
- }
+ if (civil == CIVIL) {
+ return (int32_t)uprv_ceil(29.5*month)
+ + (year-1)*354 + (int32_t)ClockMath::floorDivide((3+11*year),30);
+ } else {
+ return trueMonthStart(12*(year-1) + month);
+ }
}
-
+
/**
- * Find the day number on which a particular month of the true/lunar
- * Islamic calendar starts.
- *
- * @param month The month in question, origin 0 from the Hijri epoch
- *
- * @return The day number on which the given month starts.
- */
+* Find the day number on which a particular month of the true/lunar
+* Islamic calendar starts.
+*
+* @param month The month in question, origin 0 from the Hijri epoch
+*
+* @return The day number on which the given month starts.
+*/
int32_t IslamicCalendar::trueMonthStart(int32_t month) const
{
- UErrorCode status = U_ZERO_ERROR;
- int32_t start = CalendarCache::get(&gMonthCache, month, status);
-
- if (start==0) {
- // Make a guess at when the month started, using the average length
- UDate origin = HIJRA_MILLIS
- + uprv_floor(month * CalendarAstronomer::SYNODIC_MONTH - 1) * kOneDay;
-
- double age = moonAge(origin);
-
- if (moonAge(origin) >= 0) {
- // The month has already started
- do {
- origin -= kOneDay;
- age = moonAge(origin);
- } while (age >= 0);
+ UErrorCode status = U_ZERO_ERROR;
+ int32_t start = CalendarCache::get(&gMonthCache, month, status);
+
+ if (start==0) {
+ // Make a guess at when the month started, using the average length
+ UDate origin = HIJRA_MILLIS
+ + uprv_floor(month * CalendarAstronomer::SYNODIC_MONTH) * kOneDay;
+
+ // moonAge will fail due to memory allocation error
+ double age = moonAge(origin, status);
+ if (U_FAILURE(status)) {
+ goto trueMonthStartEnd;
+ }
+
+ if (age >= 0) {
+ // The month has already started
+ do {
+ origin -= kOneDay;
+ age = moonAge(origin, status);
+ if (U_FAILURE(status)) {
+ goto trueMonthStartEnd;
+ }
+ } while (age >= 0);
+ }
+ else {
+ // Preceding month has not ended yet.
+ do {
+ origin += kOneDay;
+ age = moonAge(origin, status);
+ if (U_FAILURE(status)) {
+ goto trueMonthStartEnd;
+ }
+ } while (age < 0);
+ }
+ start = (int32_t)ClockMath::floorDivide((origin - HIJRA_MILLIS), (double)kOneDay) + 1;
+ CalendarCache::put(&gMonthCache, month, start, status);
}
- else {
- // Preceding month has not ended yet.
- do {
- origin += kOneDay;
- age = moonAge(origin);
- } while (age < 0);
+trueMonthStartEnd :
+ if(U_FAILURE(status)) {
+ start = 0;
}
- start = (int32_t)Math::floorDivide((origin - HIJRA_MILLIS), (double)kOneDay) + 1;
- CalendarCache::put(&gMonthCache, month, start, status);
- }
- if(U_FAILURE(status)) {
- start = 0;
- }
- return start;
+ return start;
}
/**
- * Return the "age" of the moon at the given time; this is the difference
- * in ecliptic latitude between the moon and the sun. This method simply
- * calls CalendarAstronomer.moonAge, converts to degrees,
- * and adjusts the result to be in the range [-180, 180].
- *
- * @param time The time at which the moon's age is desired,
- * in millis since 1/1/1970.
- */
-double IslamicCalendar::moonAge(UDate time)
+* Return the "age" of the moon at the given time; this is the difference
+* in ecliptic latitude between the moon and the sun. This method simply
+* calls CalendarAstronomer.moonAge, converts to degrees,
+* and adjusts the result to be in the range [-180, 180].
+*
+* @param time The time at which the moon's age is desired,
+* in millis since 1/1/1970.
+*/
+double IslamicCalendar::moonAge(UDate time, UErrorCode &status)
{
- double age = 0;
-
- umtx_lock(&astroLock);
- if(gIslamicCalendarAstro == NULL) {
- gIslamicCalendarAstro = new CalendarAstronomer();
- }
- gIslamicCalendarAstro->setTime(time);
- age = gIslamicCalendarAstro->getMoonAge();
- ucln_i18n_registerCleanup(UCLN_I18N_ISLAMIC_CALENDAR, calendar_islamic_cleanup);
- umtx_unlock(&astroLock);
-
- // Convert to degrees and normalize...
- age = age * 180 / CalendarAstronomer::PI;
- if (age > 180) {
- age = age - 360;
- }
-
- return age;
+ double age = 0;
+
+ umtx_lock(&astroLock);
+ if(gIslamicCalendarAstro == NULL) {
+ gIslamicCalendarAstro = new CalendarAstronomer();
+ if (gIslamicCalendarAstro == NULL) {
+ status = U_MEMORY_ALLOCATION_ERROR;
+ return age;
+ }
+ ucln_i18n_registerCleanup(UCLN_I18N_ISLAMIC_CALENDAR, calendar_islamic_cleanup);
+ }
+ gIslamicCalendarAstro->setTime(time);
+ age = gIslamicCalendarAstro->getMoonAge();
+ umtx_unlock(&astroLock);
+
+ // Convert to degrees and normalize...
+ age = age * 180 / CalendarAstronomer::PI;
+ if (age > 180) {
+ age = age - 360;
+ }
+
+ return age;
}
//----------------------------------------------------------------------
//----------------------------------------------------------------------
/**
- * Return the length (in days) of the given month.
- *
- * @param year The hijri year
- * @param year The hijri month, 0-based
- * @draft ICU 2.4
- */
+* Return the length (in days) of the given month.
+*
+* @param year The hijri year
+* @param year The hijri month, 0-based
+* @draft ICU 2.4
+*/
int32_t IslamicCalendar::handleGetMonthLength(int32_t extendedYear, int32_t month) const {
- int32_t length = 0;
-
- if (civil == CIVIL) {
- length = 29 + (month+1) % 2;
- if (month == DHU_AL_HIJJAH && civilLeapYear(extendedYear)) {
- length++;
+ int32_t length = 0;
+
+ if (civil == CIVIL) {
+ length = 29 + (month+1) % 2;
+ if (month == DHU_AL_HIJJAH && civilLeapYear(extendedYear)) {
+ length++;
+ }
+ } else {
+ month = 12*(extendedYear-1) + month;
+ length = trueMonthStart(month+1) - trueMonthStart(month) ;
}
- } else {
- month = 12*(extendedYear-1) + month;
- length = trueMonthStart(month+1) - trueMonthStart(month) ;
- }
- return length;
+ return length;
}
/**
- * Return the number of days in the given Islamic year
- * @draft ICU 2.4
- */
+* Return the number of days in the given Islamic year
+* @draft ICU 2.4
+*/
int32_t IslamicCalendar::handleGetYearLength(int32_t extendedYear) const {
- if (civil == CIVIL) {
- return 354 + (civilLeapYear(extendedYear) ? 1 : 0);
- } else {
- int32_t month = 12*(extendedYear-1);
- return (trueMonthStart(month + 12) - trueMonthStart(month));
- }
+ if (civil == CIVIL) {
+ return 354 + (civilLeapYear(extendedYear) ? 1 : 0);
+ } else {
+ int32_t month = 12*(extendedYear-1);
+ return (trueMonthStart(month + 12) - trueMonthStart(month));
+ }
}
-
+
//-------------------------------------------------------------------------
// Functions for converting from field values to milliseconds....
//-------------------------------------------------------------------------
// Return JD of start of given month/year
/**
- * @draft ICU 2.4
- */
+* @draft ICU 2.4
+*/
int32_t IslamicCalendar::handleComputeMonthStart(int32_t eyear, int32_t month, UBool /* useMonth */) const {
- return monthStart(eyear, month) + 1948439;
+ return monthStart(eyear, month) + 1948439;
}
//-------------------------------------------------------------------------
// Functions for converting from milliseconds to field values
//-------------------------------------------------------------------------
- /**
- * @draft ICU 2.4
- */
+/**
+* @draft ICU 2.4
+*/
int32_t IslamicCalendar::handleGetExtendedYear() {
int32_t year;
if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
}
/**
- * Override Calendar to compute several fields specific to the Islamic
- * calendar system. These are:
- *
- * <li>YEAR
- * <li>MONTH
- * <li>DAY_OF_MONTH
- * <li>DAY_OF_YEAR
- * <li>EXTENDED_YEAR</ul>
- *
- * The DAY_OF_WEEK and DOW_LOCAL fields are already set when this
- * method is called. The getGregorianXxx() methods return Gregorian
- * calendar equivalents for the given Julian day.
- * @draft ICU 2.4
- */
-void IslamicCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/) {
+* Override Calendar to compute several fields specific to the Islamic
+* calendar system. These are:
+*
+* <ul><li>ERA
+* <li>YEAR
+* <li>MONTH
+* <li>DAY_OF_MONTH
+* <li>DAY_OF_YEAR
+* <li>EXTENDED_YEAR</ul>
+*
+* The DAY_OF_WEEK and DOW_LOCAL fields are already set when this
+* method is called. The getGregorianXxx() methods return Gregorian
+* calendar equivalents for the given Julian day.
+* @draft ICU 2.4
+*/
+void IslamicCalendar::handleComputeFields(int32_t julianDay, UErrorCode &status) {
int32_t year, month, dayOfMonth, dayOfYear;
UDate startDate;
int32_t days = julianDay - 1948440;
-
+
if (civil == CIVIL) {
// Use the civil calendar approximation, which is just arithmetic
- year = (int)Math::floorDivide( (double)(30 * days + 10646) , 10631.0 );
+ year = (int)ClockMath::floorDivide( (double)(30 * days + 10646) , 10631.0 );
month = (int32_t)uprv_ceil((days - 29 - yearStart(year)) / 29.5 );
month = month<11?month:11;
startDate = monthStart(year, month);
// Guess at the number of elapsed full months since the epoch
int32_t months = (int32_t)uprv_floor((double)days / CalendarAstronomer::SYNODIC_MONTH);
- startDate = uprv_floor(months * CalendarAstronomer::SYNODIC_MONTH - 1);
+ startDate = uprv_floor(months * CalendarAstronomer::SYNODIC_MONTH);
- if ( days - startDate >= 28 && moonAge(internalGetTime()) > 0) {
+ double age = moonAge(internalGetTime(), status);
+ if (U_FAILURE(status)) {
+ status = U_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+ if ( days - startDate >= 25 && age > 0) {
// If we're near the end of the month, assume next month and search backwards
months++;
}
// If it was after the date in question, back up a month and try again
months--;
}
-
+
year = months / 12 + 1;
month = months % 12;
}
-
+
dayOfMonth = (days - monthStart(year, month)) + 1;
// Now figure out the day of the year.
UBool
IslamicCalendar::inDaylightTime(UErrorCode& status) const
{
-// copied from GregorianCalendar
-if (U_FAILURE(status) || !getTimeZone().useDaylightTime())
- return FALSE;
+ // copied from GregorianCalendar
+ if (U_FAILURE(status) || (&(getTimeZone()) == NULL && !getTimeZone().useDaylightTime()))
+ return FALSE;
// Force an update of the state of the Calendar.
-((IslamicCalendar*)this)->complete(status); // cast away const
+ ((IslamicCalendar*)this)->complete(status); // cast away const
-return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE);
+ return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE);
}
// default century
UBool IslamicCalendar::haveDefaultCentury() const
{
- return TRUE;
+ return TRUE;
}
UDate IslamicCalendar::defaultCenturyStart() const
{
- return internalGetDefaultCenturyStart();
+ return internalGetDefaultCenturyStart();
}
int32_t IslamicCalendar::defaultCenturyStartYear() const
{
- return internalGetDefaultCenturyStartYear();
+ return internalGetDefaultCenturyStartYear();
}
UDate
IslamicCalendar::internalGetDefaultCenturyStart() const
{
- // lazy-evaluate systemDefaultCenturyStart
- UBool needsUpdate;
- {
- Mutex m;
- needsUpdate = (fgSystemDefaultCenturyStart == fgSystemDefaultCentury);
- }
-
- if (needsUpdate) {
- initializeSystemDefaultCentury();
- }
-
- // use defaultCenturyStart unless it's the flag value;
- // then use systemDefaultCenturyStart
-
- return fgSystemDefaultCenturyStart;
+ // 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
IslamicCalendar::internalGetDefaultCenturyStartYear() const
{
- // lazy-evaluate systemDefaultCenturyStartYear
- UBool needsUpdate;
- {
- Mutex m;
- needsUpdate = (fgSystemDefaultCenturyStart == fgSystemDefaultCentury);
- }
-
- if (needsUpdate) {
- initializeSystemDefaultCentury();
- }
-
- // use defaultCenturyStart unless it's the flag value;
- // then use systemDefaultCenturyStartYear
-
- return fgSystemDefaultCenturyStartYear;
+ // 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
IslamicCalendar::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)
- {
+ // 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;
IslamicCalendar calendar(Locale("@calendar=islamic-civil"),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);
- {
- Mutex m;
- fgSystemDefaultCenturyStart = newStart;
- fgSystemDefaultCenturyStartYear = newYear;
- }
+ 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.
- }
}
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(IslamicCalendar)
projects / apple / icu.git / blobdiff