| /* |
| ****************************************************************************** |
| * Copyright (C) 2003-2008, International Business Machines Corporation |
| * and others. All Rights Reserved. |
| ****************************************************************************** |
| * |
| * File PERSNCAL.CPP |
| * |
| * Modification History: |
| * |
| * Date Name Description |
| * 9/23/2003 mehran posted to icu-design |
| ***************************************************************************** |
| */ |
| |
| #include "persncal.h" |
| |
| #if !UCONFIG_NO_FORMATTING |
| |
| #include "umutex.h" |
| #include <float.h> |
| |
| static const int8_t monthDays[] = { 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29 }; |
| |
| static int32_t |
| jalali_to_julian(int year, int month, int day) |
| { |
| int32_t daysNo=0; |
| int i; |
| |
| year = year -475+2820; |
| month -= 1; |
| |
| daysNo=(year/2820)*1029983; |
| year=year % 2820; |
| |
| daysNo+=(year/128)* 46751; |
| if((year/128)>21) |
| { |
| daysNo-=46751; |
| year=(year%128)+128; |
| } |
| else |
| year=year%128; |
| |
| if(year>=29) |
| { |
| year-=29; |
| daysNo+=10592; |
| } |
| |
| if(year>=66) |
| { |
| year-=66; |
| daysNo+=24106; |
| } |
| else if( year>=33) |
| { |
| daysNo+=(year/33)* 12053; |
| year=year%33; |
| } |
| |
| if (year >= 5) |
| { |
| daysNo += 1826; |
| year -=5; |
| } |
| else if (year == 4) |
| { |
| daysNo += 1460; |
| year -=4; |
| } |
| |
| daysNo += 1461 * (year/4); |
| year %= 4; |
| daysNo += 365 * year; |
| |
| for (i = 0; i < month; i++) { |
| daysNo += monthDays[i]; |
| } |
| |
| daysNo += day; |
| |
| return daysNo-856493; |
| } |
| |
| static void julian_to_jalali (int32_t daysNo, int *h_y, int *h_m, int *h_d) |
| { |
| int year=0, month=0, day=0,scalarDays=0; |
| int i; |
| |
| daysNo+=856493; |
| scalarDays=daysNo; |
| year=(daysNo/1029983)*2820; |
| daysNo=daysNo%1029983; |
| |
| if((daysNo/46751)<=21) |
| { |
| year+=(daysNo/46751)* 128; |
| daysNo=daysNo%46751; |
| } |
| else |
| { |
| year+=(daysNo/46751)* 128; |
| daysNo=daysNo%46751; |
| year-=128; |
| daysNo+=46751; |
| } |
| |
| if (daysNo >= 10592) |
| { |
| year+= 29; |
| daysNo -= 10592; |
| } |
| |
| if(daysNo>=24106) |
| { |
| daysNo-=24106; |
| year+=66; |
| } |
| |
| if(daysNo>=12053) |
| { |
| daysNo-=12053; |
| year+=33; |
| } |
| |
| |
| if (daysNo >= 1826) |
| { |
| year+= 5; |
| daysNo -= 1826; |
| } |
| else if (daysNo > 1095) |
| { |
| year+= 3; |
| daysNo -= 1095; |
| |
| } |
| |
| year +=(4 * (daysNo/1461)); |
| daysNo %= 1461; |
| |
| if (daysNo == 0) |
| { |
| year -= 1; |
| daysNo = 366; |
| } |
| else |
| { |
| year += daysNo/365; |
| daysNo = daysNo % 365; |
| if (daysNo == 0) |
| { |
| year -= 1; |
| daysNo = 365; |
| } |
| |
| } |
| |
| for (i = 0; i < 11 && daysNo > monthDays[i]; ++i) { |
| daysNo -= monthDays[i]; |
| } |
| |
| month = i + 1; |
| |
| day = daysNo; |
| |
| *h_d = day; |
| *h_m = month; |
| *h_y = year-2345; |
| } |
| |
| U_NAMESPACE_BEGIN |
| |
| // Implementation of the PersianCalendar class |
| |
| //------------------------------------------------------------------------- |
| // Constructors... |
| //------------------------------------------------------------------------- |
| |
| const char *PersianCalendar::getType() const { |
| return "persian"; |
| } |
| |
| Calendar* PersianCalendar::clone() const { |
| return new PersianCalendar(*this); |
| } |
| |
| PersianCalendar::PersianCalendar(const Locale& aLocale, UErrorCode& success) |
| : Calendar(TimeZone::createDefault(), aLocale, success) |
| { |
| setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly. |
| } |
| |
| PersianCalendar::PersianCalendar(const PersianCalendar& other) : Calendar(other) { |
| } |
| |
| PersianCalendar::~PersianCalendar() |
| { |
| } |
| |
| //------------------------------------------------------------------------- |
| // Minimum / Maximum access functions |
| //------------------------------------------------------------------------- |
| |
| static const int32_t LIMITS[UCAL_FIELD_COUNT][4] = { |
| // Minimum Greatest Least Maximum |
| // Minimum Maximum |
| { 0, 0, 0, 0}, // ERA |
| { -5000000, -5000000, 5000000, 5000000}, // YEAR |
| { 0, 0, 11, 11}, // MONTH |
| { 1, 1, 52, 53}, // 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 |
| { 1, 1, 365, 366}, // 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 |
| { -5000000, -5000000, 5000000, 5000000}, // YEAR_WOY |
| {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL |
| { -5000000, -5000000, 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 |
| }; |
| static const int32_t MONTH_COUNT[12][4] = { |
| //len len2 st st2 |
| { 31, 31, 0, 0 }, // Farvardin |
| { 31, 31, 31, 31 }, // Ordibehesht |
| { 31, 31, 62, 62 }, // Khordad |
| { 31, 31, 93, 93 }, // Tir |
| { 31, 31, 124, 124 }, // Mordad |
| { 31, 31, 155, 155 }, // Shahrivar |
| { 30, 30, 186, 186 }, // Mehr |
| { 30, 30, 216, 216 }, // Aban |
| { 30, 30, 246, 246 }, // Azar |
| { 30, 30, 276, 276 }, // Dey |
| { 30, 30, 306, 306 }, // Bahman |
| { 29, 30, 336, 336 } // Esfand |
| // len length of month |
| // len2 length of month in a leap year |
| // st days in year before start of month |
| // st2 days in year before month in leap year |
| }; |
| |
| int32_t PersianCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const { |
| return LIMITS[field][limitType]; |
| } |
| |
| //------------------------------------------------------------------------- |
| // Assorted calculation utilities |
| // |
| |
| /** |
| * Determine whether a year is a leap year in the Persian calendar |
| */ |
| UBool PersianCalendar::isLeapYear(int32_t year) |
| { |
| return jalali_to_julian(year+1,1,1)-jalali_to_julian(year,1,1) == 366; |
| } |
| |
| /** |
| * Return the day # on which the given year starts. Days are counted |
| * from the Hijri epoch, origin 0. |
| */ |
| int32_t PersianCalendar::yearStart(int32_t year) { |
| return handleComputeMonthStart(year,1,FALSE); |
| } |
| |
| /** |
| * Return the day # on which the given month starts. Days are counted |
| * from the Hijri epoch, origin 0. |
| * |
| * @param year The hijri shamsi year |
| * @param year The hijri shamsi month, 0-based |
| */ |
| int32_t PersianCalendar::monthStart(int32_t year, int32_t month) const { |
| return handleComputeMonthStart(year,month,FALSE); |
| } |
| |
| //---------------------------------------------------------------------- |
| // Calendar framework |
| //---------------------------------------------------------------------- |
| |
| /** |
| * Return the length (in days) of the given month. |
| * |
| * @param year The hijri shamsi year |
| * @param year The hijri shamsi month, 0-based |
| */ |
| int32_t PersianCalendar::handleGetMonthLength(int32_t extendedYear, int32_t month) const { |
| return MONTH_COUNT[month][PersianCalendar::isLeapYear(extendedYear)?1:0]; |
| } |
| |
| /** |
| * Return the number of days in the given Persian year |
| */ |
| int32_t PersianCalendar::handleGetYearLength(int32_t extendedYear) const { |
| return 365 + (PersianCalendar::isLeapYear(extendedYear) ? 1 : 0); |
| } |
| |
| //------------------------------------------------------------------------- |
| // Functions for converting from field values to milliseconds.... |
| //------------------------------------------------------------------------- |
| |
| // Return JD of start of given month/year |
| int32_t PersianCalendar::handleComputeMonthStart(int32_t eyear, int32_t month, UBool useMonth) const { |
| // If the month is out of range, adjust it into range, and |
| // modify the extended year value accordingly. |
| if (month < 0 || month > 11) { |
| eyear += month / 12; |
| month = month % 12; |
| } |
| return jalali_to_julian(eyear,(useMonth?month+1:1),1)-1+1947955; |
| } |
| |
| //------------------------------------------------------------------------- |
| // Functions for converting from milliseconds to field values |
| //------------------------------------------------------------------------- |
| |
| int32_t PersianCalendar::handleGetExtendedYear() { |
| int32_t year; |
| if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) { |
| year = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1 |
| } else { |
| year = internalGet(UCAL_YEAR, 1); // Default to year 1 |
| } |
| return year; |
| } |
| |
| /** |
| * Override Calendar to compute several fields specific to the Persian |
| * 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. |
| */ |
| void PersianCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/) { |
| int jy,jm,jd; |
| julian_to_jalali(julianDay-1947955,&jy,&jm,&jd); |
| internalSet(UCAL_ERA, 0); |
| internalSet(UCAL_YEAR, jy); |
| internalSet(UCAL_EXTENDED_YEAR, jy); |
| internalSet(UCAL_MONTH, jm-1); |
| internalSet(UCAL_DAY_OF_MONTH, jd); |
| internalSet(UCAL_DAY_OF_YEAR, jd + MONTH_COUNT[jm-1][2]); |
| } |
| |
| UBool |
| PersianCalendar::inDaylightTime(UErrorCode& status) const |
| { |
| // copied from GregorianCalendar |
| if (U_FAILURE(status) || !getTimeZone().useDaylightTime()) |
| return FALSE; |
| |
| // Force an update of the state of the Calendar. |
| ((PersianCalendar*)this)->complete(status); // cast away const |
| |
| return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE); |
| } |
| |
| // default century |
| const UDate PersianCalendar::fgSystemDefaultCentury = DBL_MIN; |
| const int32_t PersianCalendar::fgSystemDefaultCenturyYear = -1; |
| |
| UDate PersianCalendar::fgSystemDefaultCenturyStart = DBL_MIN; |
| int32_t PersianCalendar::fgSystemDefaultCenturyStartYear = -1; |
| |
| UBool PersianCalendar::haveDefaultCentury() const |
| { |
| return TRUE; |
| } |
| |
| UDate PersianCalendar::defaultCenturyStart() const |
| { |
| return internalGetDefaultCenturyStart(); |
| } |
| |
| int32_t PersianCalendar::defaultCenturyStartYear() const |
| { |
| return internalGetDefaultCenturyStartYear(); |
| } |
| |
| UDate |
| PersianCalendar::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 |
| PersianCalendar::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 |
| PersianCalendar::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; |
| PersianCalendar calendar(Locale("@calendar=persian"),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. |
| } |
| |
| UOBJECT_DEFINE_RTTI_IMPLEMENTATION(PersianCalendar) |
| |
| U_NAMESPACE_END |
| |
| #endif |
| |
