mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
294 lines
9.9 KiB
294 lines
9.9 KiB
// Copyright (C) 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
******************************************************************************
|
|
* Copyright (C) 2003-2013, 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
|
|
* 10/1/2012 roozbeh Fixed algorithm and heavily refactored and rewrote
|
|
* based on the implementation of Gregorian
|
|
*****************************************************************************
|
|
*/
|
|
|
|
#include "persncal.h"
|
|
|
|
#if !UCONFIG_NO_FORMATTING
|
|
|
|
#include "umutex.h"
|
|
#include "gregoimp.h" // Math
|
|
#include <float.h>
|
|
|
|
static const int16_t kPersianNumDays[]
|
|
= {0,31,62,93,124,155,186,216,246,276,306,336}; // 0-based, for day-in-year
|
|
static const int8_t kPersianMonthLength[]
|
|
= {31,31,31,31,31,31,30,30,30,30,30,29}; // 0-based
|
|
static const int8_t kPersianLeapMonthLength[]
|
|
= {31,31,31,31,31,31,30,30,30,30,30,30}; // 0-based
|
|
|
|
static const int32_t kPersianCalendarLimits[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
|
|
};
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
static const int32_t PERSIAN_EPOCH = 1948320;
|
|
|
|
// 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
|
|
//-------------------------------------------------------------------------
|
|
|
|
|
|
int32_t PersianCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const {
|
|
return kPersianCalendarLimits[field][limitType];
|
|
}
|
|
|
|
//-------------------------------------------------------------------------
|
|
// Assorted calculation utilities
|
|
//
|
|
|
|
/**
|
|
* Determine whether a year is a leap year in the Persian calendar
|
|
*/
|
|
UBool PersianCalendar::isLeapYear(int32_t year)
|
|
{
|
|
int32_t remainder;
|
|
ClockMath::floorDivide(25 * year + 11, 33, remainder);
|
|
return (remainder < 8);
|
|
}
|
|
|
|
/**
|
|
* Return the day # on which the given year starts. Days are counted
|
|
* from the Persian epoch, origin 0.
|
|
*/
|
|
int32_t PersianCalendar::yearStart(int32_t year) {
|
|
return handleComputeMonthStart(year,0,FALSE);
|
|
}
|
|
|
|
/**
|
|
* Return the day # on which the given month starts. Days are counted
|
|
* from the Persian epoch, origin 0.
|
|
*
|
|
* @param year The Persian year
|
|
* @param year The Persian month, 0-based
|
|
*/
|
|
int32_t PersianCalendar::monthStart(int32_t year, int32_t month) const {
|
|
return handleComputeMonthStart(year,month,TRUE);
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Calendar framework
|
|
//----------------------------------------------------------------------
|
|
|
|
/**
|
|
* Return the length (in days) of the given month.
|
|
*
|
|
* @param year The Persian year
|
|
* @param year The Persian month, 0-based
|
|
*/
|
|
int32_t PersianCalendar::handleGetMonthLength(int32_t extendedYear, int32_t month) const {
|
|
// If the month is out of range, adjust it into range, and
|
|
// modify the extended year value accordingly.
|
|
if (month < 0 || month > 11) {
|
|
extendedYear += ClockMath::floorDivide(month, 12, month);
|
|
}
|
|
|
|
return isLeapYear(extendedYear) ? kPersianLeapMonthLength[month] : kPersianMonthLength[month];
|
|
}
|
|
|
|
/**
|
|
* Return the number of days in the given Persian year
|
|
*/
|
|
int32_t PersianCalendar::handleGetYearLength(int32_t extendedYear) const {
|
|
return isLeapYear(extendedYear) ? 366 : 365;
|
|
}
|
|
|
|
//-------------------------------------------------------------------------
|
|
// 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 += ClockMath::floorDivide(month, 12, month);
|
|
}
|
|
|
|
int32_t julianDay = PERSIAN_EPOCH - 1 + 365 * (eyear - 1) + ClockMath::floorDivide(8 * eyear + 21, 33);
|
|
|
|
if (month != 0) {
|
|
julianDay += kPersianNumDays[month];
|
|
}
|
|
|
|
return julianDay;
|
|
}
|
|
|
|
//-------------------------------------------------------------------------
|
|
// 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.
|
|
*/
|
|
void PersianCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/) {
|
|
int32_t year, month, dayOfMonth, dayOfYear;
|
|
|
|
int32_t daysSinceEpoch = julianDay - PERSIAN_EPOCH;
|
|
year = 1 + ClockMath::floorDivide(33 * daysSinceEpoch + 3, 12053);
|
|
|
|
int32_t farvardin1 = 365 * (year - 1) + ClockMath::floorDivide(8 * year + 21, 33);
|
|
dayOfYear = (daysSinceEpoch - farvardin1); // 0-based
|
|
if (dayOfYear < 216) { // Compute 0-based month
|
|
month = dayOfYear / 31;
|
|
} else {
|
|
month = (dayOfYear - 6) / 30;
|
|
}
|
|
dayOfMonth = dayOfYear - kPersianNumDays[month] + 1;
|
|
++dayOfYear; // Make it 1-based now
|
|
|
|
internalSet(UCAL_ERA, 0);
|
|
internalSet(UCAL_YEAR, year);
|
|
internalSet(UCAL_EXTENDED_YEAR, year);
|
|
internalSet(UCAL_MONTH, month);
|
|
internalSet(UCAL_DAY_OF_MONTH, dayOfMonth);
|
|
internalSet(UCAL_DAY_OF_YEAR, dayOfYear);
|
|
}
|
|
|
|
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
|
|
|
|
static UDate gSystemDefaultCenturyStart = DBL_MIN;
|
|
static int32_t gSystemDefaultCenturyStartYear = -1;
|
|
static icu::UInitOnce gSystemDefaultCenturyInit = U_INITONCE_INITIALIZER;
|
|
|
|
UBool PersianCalendar::haveDefaultCentury() const
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
static void U_CALLCONV 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);
|
|
|
|
gSystemDefaultCenturyStart = calendar.getTime(status);
|
|
gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status);
|
|
}
|
|
// We have no recourse upon failure unless we want to propagate the failure
|
|
// out.
|
|
}
|
|
|
|
UDate PersianCalendar::defaultCenturyStart() const {
|
|
// lazy-evaluate systemDefaultCenturyStart
|
|
umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
|
|
return gSystemDefaultCenturyStart;
|
|
}
|
|
|
|
int32_t PersianCalendar::defaultCenturyStartYear() const {
|
|
// lazy-evaluate systemDefaultCenturyStartYear
|
|
umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
|
|
return gSystemDefaultCenturyStartYear;
|
|
}
|
|
|
|
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(PersianCalendar)
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif
|
|
|