/* * Copyright (C) 2003-2007, 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 static const int 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 { -2500, -2500, 2500, 2500 }, // YEAR { 0, 0, 11, 11 }, // MONTH { 1, 1, 52, 53 }, // WEEK_OF_YEAR { 0, 0, 5, 6 }, // WEEK_OF_MONTH { 1, 1, 29, 31 }, // DAY_OF_MONTH { 1, 1, 365, 366 }, // DAY_OF_YEAR { 0, 0, 6, 6 }, // DAY_OF_WEEK { 1, 1, 4, 6 }, // DAY_OF_WEEK_IN_MONTH { 0, 0, 1, 1 }, // AM_PM { 0, 0, 11, 11 }, // HOUR { 0, 0, 23, 23 }, // HOUR_OF_DAY { 0, 0, 59, 59 }, // MINUTE { 0, 0, 59, 59 }, // SECOND { 0, 0, 999, 999 }, // MILLISECOND { -12, -12, 12, 12 }, // ZONE_OFFSET { 0, 0, 1, 1 }, // DST_OFFSET { -140742, -140742, 144683, 140742 }, // YEAR_WOY { 0, 0, 6, 6 }, // DOW_LOCAL { -2500, -2500, 2500, 2500 }, // 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: * * * * 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); } UBool PersianCalendar::haveDefaultCentury() const { return FALSE; } UDate PersianCalendar::defaultCenturyStart() const { return -1; } int32_t PersianCalendar::defaultCenturyStartYear() const { return -1; } UOBJECT_DEFINE_RTTI_IMPLEMENTATION(PersianCalendar) U_NAMESPACE_END #endif