/*
* 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
{/* -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
};
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);
}
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