/* | |
* 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,yearOffset,monthOffset; | |
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 | |
{/* -1, -1, -1, -1 */}, // JULIAN_DAY | |
{/* -1, -1, -1, -1 */}, // MILLISECONDS_IN_DAY | |
}; | |
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 | |
}; | |
/** | |
* @draft ICU 3.8 | |
*/ | |
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 | |
* @draft ICU 3.8 | |
*/ | |
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 | |
* @draft ICU 3.8 | |
*/ | |
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 | |
/** | |
* @draft ICU 3.8 | |
*/ | |
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+1947955L; | |
} | |
//------------------------------------------------------------------------- | |
// Functions for converting from milliseconds to field values | |
//------------------------------------------------------------------------- | |
/** | |
* @draft ICU 3.8 | |
*/ | |
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. | |
* @draft ICU 3.8 | |
*/ | |
void PersianCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/) { | |
int jy,jm,jd; | |
julian_to_jalali(julianDay-1947955L,&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 | |