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Diffstat (limited to 'Build/source/libs/icu/icu-4.8.1/i18n/persncal.cpp')
-rw-r--r-- | Build/source/libs/icu/icu-4.8.1/i18n/persncal.cpp | 465 |
1 files changed, 465 insertions, 0 deletions
diff --git a/Build/source/libs/icu/icu-4.8.1/i18n/persncal.cpp b/Build/source/libs/icu/icu-4.8.1/i18n/persncal.cpp new file mode 100644 index 00000000000..51303417aa9 --- /dev/null +++ b/Build/source/libs/icu/icu-4.8.1/i18n/persncal.cpp @@ -0,0 +1,465 @@ +/* + ****************************************************************************** + * 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 + |