/src/icu/icu4c/source/i18n/persncal.cpp

Source
// © 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 "uassert.h"
#include "umutex.h"
#include "gregoimp.h" // Math
#include <float.h>
#include "cmemory.h"
#include "ucln_in.h"
#include "unicode/uniset.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
    {        0,        0,       11,       11}, // ORDINAL_MONTH
};

namespace { // anonymous

static const icu::UnicodeSet *gLeapCorrection = nullptr;
static icu::UInitOnce gCorrectionInitOnce {};
static int32_t gMinCorrection;
}  // namespace
U_CDECL_BEGIN
static UBool calendar_persian_cleanup() {
    if (gLeapCorrection) {
        delete gLeapCorrection;
        gLeapCorrection = nullptr;
    }
    gCorrectionInitOnce.reset();
    return true;
}
U_CDECL_END

namespace { // anonymous
static void U_CALLCONV initLeapCorrection() {
    static int16_t nonLeapYears[] = {
       1502, 1601, 1634, 1667, 1700, 1733, 1766, 1799, 1832, 1865, 1898, 1931, 1964, 1997, 2030, 2059,
       2063, 2096, 2129, 2158, 2162, 2191, 2195, 2224, 2228, 2257, 2261, 2290, 2294, 2323, 2327, 2356,
       2360, 2389, 2393, 2422, 2426, 2455, 2459, 2488, 2492, 2521, 2525, 2554, 2558, 2587, 2591, 2620,
       2624, 2653, 2657, 2686, 2690, 2719, 2723, 2748, 2752, 2756, 2781, 2785, 2789, 2818, 2822, 2847,
       2851, 2855, 2880, 2884, 2888, 2913, 2917, 2921, 2946, 2950, 2954, 2979, 2983, 2987,
    };
    gMinCorrection = nonLeapYears[0];
    icu::UnicodeSet prefab;
    for (auto year : nonLeapYears) {
        prefab.add(year);
    }
    gLeapCorrection = prefab.cloneAsThawed()->freeze();
    ucln_i18n_registerCleanup(UCLN_I18N_PERSIAN_CALENDAR, calendar_persian_cleanup);
}
const icu::UnicodeSet* getLeapCorrection() {
    umtx_initOnce(gCorrectionInitOnce, &initLeapCorrection);
    return gLeapCorrection;
}
} // namespace anonymous
U_NAMESPACE_BEGIN

static const int32_t PERSIAN_EPOCH = 1948320;

// Implementation of the PersianCalendar class

//-------------------------------------------------------------------------
// Constructors...
//-------------------------------------------------------------------------

const char *PersianCalendar::getType() const { 
    return "persian";
}

PersianCalendar* PersianCalendar::clone() const {
    return new PersianCalendar(*this);
}

PersianCalendar::PersianCalendar(const Locale& aLocale, UErrorCode& success)
  :   Calendar(TimeZone::forLocaleOrDefault(aLocale), aLocale, success)
{
}

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)
{
    if (year >= gMinCorrection && getLeapCorrection()->contains(year)) {
        return false;
    }
    if (year > gMinCorrection && getLeapCorrection()->contains(year-1)) {
        return true;
    }
    int64_t y = static_cast<int64_t>(year) * 25LL + 11LL;
    bool res = (y % 33L < 8);
    return res;
}
    
/**
 * 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, UErrorCode& status) {
    return handleComputeMonthStart(year,0,false, status);
}
    
/**
 * 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, UErrorCode& status) const {
    return handleComputeMonthStart(year,month,true, status);
}
    
//----------------------------------------------------------------------
// 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, UErrorCode& /*status*/) 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, UErrorCode& status) const {
    if (U_FAILURE(status)) return 0;
    return isLeapYear(extendedYear) ? 366 : 365;
}
    
//-------------------------------------------------------------------------
// Functions for converting from field values to milliseconds....
//-------------------------------------------------------------------------

static int64_t firstJulianOfYear(int64_t year) {
    int64_t julianDay = 365LL * (year - 1LL) + ClockMath::floorDivide(8LL * year + 21, 33);
    if (year > gMinCorrection && getLeapCorrection()->contains(year-1)) {
        julianDay--;
    }
    return julianDay;
}


// Return JD of start of given month/year
int64_t PersianCalendar::handleComputeMonthStart(int32_t eyear, int32_t month, UBool /*useMonth*/, UErrorCode& status) const {
    if (U_FAILURE(status)) {
        return 0;
    }
    // If the month is out of range, adjust it into range, and
    // modify the extended year value accordingly.
    if (month < 0 || month > 11) {
        if (uprv_add32_overflow(eyear, ClockMath::floorDivide(month, 12, &month), &eyear)) {
            status = U_ILLEGAL_ARGUMENT_ERROR;
            return 0;
        }
    }

    int64_t julianDay = PERSIAN_EPOCH - 1LL + firstJulianOfYear(eyear);

    if (month != 0) {
        julianDay += kPersianNumDays[month];
    }

    return julianDay;
}

//-------------------------------------------------------------------------
// Functions for converting from milliseconds to field values
//-------------------------------------------------------------------------

int32_t PersianCalendar::handleGetExtendedYear(UErrorCode& status) {
    if (U_FAILURE(status)) {
        return 0;
    }
    if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
        return internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1
    }
    return internalGet(UCAL_YEAR, 1); // Default to year 1
}

/**
 * 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) {
    int64_t daysSinceEpoch = julianDay;
    daysSinceEpoch -= PERSIAN_EPOCH;

    int64_t year = ClockMath::floorDivideInt64(
        33LL * daysSinceEpoch + 3LL, 12053LL) + 1LL;
    if (year > INT32_MAX || year < INT32_MIN) {
        status = U_ILLEGAL_ARGUMENT_ERROR;
        return;
    }

    int64_t farvardin1 = firstJulianOfYear(year);

    int32_t dayOfYear = daysSinceEpoch - farvardin1; // 0-based
    U_ASSERT(dayOfYear >= 0);
    U_ASSERT(dayOfYear < 366);

    if (dayOfYear == 365 && year >= gMinCorrection && getLeapCorrection()->contains(year)) {
        year++;
        dayOfYear = 0;
    }
    int32_t month;
    if (dayOfYear < 216) { // Compute 0-based month
        month = dayOfYear / 31;
    } else {
        month = (dayOfYear - 6) / 30;
    }
    U_ASSERT(month >= 0);
    U_ASSERT(month < 12);

    ++dayOfYear; // Make it 1-based now
    int32_t dayOfMonth = dayOfYear - kPersianNumDays[month];
    U_ASSERT(dayOfMonth > 0);
    U_ASSERT(dayOfMonth <= 31);


    internalSet(UCAL_ERA, 0);
    internalSet(UCAL_YEAR, year);
    internalSet(UCAL_EXTENDED_YEAR, year);
    internalSet(UCAL_MONTH, month);
    internalSet(UCAL_ORDINAL_MONTH, month);
    internalSet(UCAL_DAY_OF_MONTH, dayOfMonth);
    internalSet(UCAL_DAY_OF_YEAR, dayOfYear);
}    

IMPL_SYSTEM_DEFAULT_CENTURY(PersianCalendar, "@calendar=persian")

UOBJECT_DEFINE_RTTI_IMPLEMENTATION(PersianCalendar)
int32_t
PersianCalendar::getRelatedYearDifference() const {
    constexpr int32_t kPersianCalendarRelatedYearDifference = 622;
    return kPersianCalendarRelatedYearDifference;
}

U_NAMESPACE_END

#endif

Coverage Report

Created: 2026-02-05 06:34

Line	Count	Source
1		// © 2016 and later: Unicode, Inc. and others.
2		// License & terms of use: http://www.unicode.org/copyright.html
3		/*
4		******************************************************************************
5		* Copyright (C) 2003-2013, International Business Machines Corporation
6		* and others. All Rights Reserved.
7		******************************************************************************
8		*
9		* File PERSNCAL.CPP
10		*
11		* Modification History:
12		*
13		* Date Name Description
14		* 9/23/2003 mehran posted to icu-design
15		* 10/1/2012 roozbeh Fixed algorithm and heavily refactored and rewrote
16		* based on the implementation of Gregorian
17		*****************************************************************************
18		*/
19
20		#include "persncal.h"
21
22		#if !UCONFIG_NO_FORMATTING
23
24		#include "uassert.h"
25		#include "umutex.h"
26		#include "gregoimp.h" // Math
27		#include <float.h>
28		#include "cmemory.h"
29		#include "ucln_in.h"
30		#include "unicode/uniset.h"
31
32		static const int16_t kPersianNumDays[]
33		= {0,31,62,93,124,155,186,216,246,276,306,336}; // 0-based, for day-in-year
34		static const int8_t kPersianMonthLength[]
35		= {31,31,31,31,31,31,30,30,30,30,30,29}; // 0-based
36		static const int8_t kPersianLeapMonthLength[]
37		= {31,31,31,31,31,31,30,30,30,30,30,30}; // 0-based
38
39		static const int32_t kPersianCalendarLimits[UCAL_FIELD_COUNT][4] = {
40		// Minimum Greatest Least Maximum
41		// Minimum Maximum
42		{ 0, 0, 0, 0}, // ERA
43		{ -5000000, -5000000, 5000000, 5000000}, // YEAR
44		{ 0, 0, 11, 11}, // MONTH
45		{ 1, 1, 52, 53}, // WEEK_OF_YEAR
46		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // WEEK_OF_MONTH
47		{ 1, 1, 29, 31}, // DAY_OF_MONTH
48		{ 1, 1, 365, 366}, // DAY_OF_YEAR
49		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // DAY_OF_WEEK
50		{ 1, 1, 5, 5}, // DAY_OF_WEEK_IN_MONTH
51		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // AM_PM
52		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // HOUR
53		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // HOUR_OF_DAY
54		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // MINUTE
55		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // SECOND
56		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // MILLISECOND
57		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // ZONE_OFFSET
58		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // DST_OFFSET
59		{ -5000000, -5000000, 5000000, 5000000}, // YEAR_WOY
60		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // DOW_LOCAL
61		{ -5000000, -5000000, 5000000, 5000000}, // EXTENDED_YEAR
62		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // JULIAN_DAY
63		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // MILLISECONDS_IN_DAY
64		{/N/A/-1,/N/A/-1,/N/A/-1,/N/A/-1}, // IS_LEAP_MONTH
65		{ 0, 0, 11, 11}, // ORDINAL_MONTH
66		};
67
68		namespace { // anonymous
69
70		static const icu::UnicodeSet *gLeapCorrection = nullptr;
71		static icu::UInitOnce gCorrectionInitOnce {};
72		static int32_t gMinCorrection;
73		} // namespace
74		U_CDECL_BEGIN
75	0	static UBool calendar_persian_cleanup() {
76	0	if (gLeapCorrection) {
77	0	delete gLeapCorrection;
78	0	gLeapCorrection = nullptr;
79	0	}
80	0	gCorrectionInitOnce.reset();
81	0	return true;
82	0	}
83		U_CDECL_END
84
85		namespace { // anonymous
86	2	static void U_CALLCONV initLeapCorrection() {
87	2	static int16_t nonLeapYears[] = {
88	2	1502, 1601, 1634, 1667, 1700, 1733, 1766, 1799, 1832, 1865, 1898, 1931, 1964, 1997, 2030, 2059,
89	2	2063, 2096, 2129, 2158, 2162, 2191, 2195, 2224, 2228, 2257, 2261, 2290, 2294, 2323, 2327, 2356,
90	2	2360, 2389, 2393, 2422, 2426, 2455, 2459, 2488, 2492, 2521, 2525, 2554, 2558, 2587, 2591, 2620,
91	2	2624, 2653, 2657, 2686, 2690, 2719, 2723, 2748, 2752, 2756, 2781, 2785, 2789, 2818, 2822, 2847,
92	2	2851, 2855, 2880, 2884, 2888, 2913, 2917, 2921, 2946, 2950, 2954, 2979, 2983, 2987,
93	2	};
94	2	gMinCorrection = nonLeapYears[0];
95	2	icu::UnicodeSet prefab;
96	156	for (auto year : nonLeapYears) {
97	156	prefab.add(year);
98	156	}
99	2	gLeapCorrection = prefab.cloneAsThawed()->freeze();
100	2	ucln_i18n_registerCleanup(UCLN_I18N_PERSIAN_CALENDAR, calendar_persian_cleanup);
101	2	}
102	20.2k	const icu::UnicodeSet* getLeapCorrection() {
103	20.2k	umtx_initOnce(gCorrectionInitOnce, &initLeapCorrection);
104	20.2k	return gLeapCorrection;
105	20.2k	}
106		} // namespace anonymous
107		U_NAMESPACE_BEGIN
108
109		static const int32_t PERSIAN_EPOCH = 1948320;
110
111		// Implementation of the PersianCalendar class
112
113		//-------------------------------------------------------------------------
114		// Constructors...
115		//-------------------------------------------------------------------------
116
117	1.60k	const char *PersianCalendar::getType() const {
118	1.60k	return "persian";
119	1.60k	}
120
121	6.94k	PersianCalendar* PersianCalendar::clone() const {
122	6.94k	return new PersianCalendar(*this);
123	6.94k	}
124
125		PersianCalendar::PersianCalendar(const Locale& aLocale, UErrorCode& success)
126	451	: Calendar(TimeZone::forLocaleOrDefault(aLocale), aLocale, success)
127	451	{
128	451	}
129
130	6.94k	PersianCalendar::PersianCalendar(const PersianCalendar& other) : Calendar(other) {
131	6.94k	}
132
133		PersianCalendar::~PersianCalendar()
134	7.31k	{
135	7.31k	}
136
137		//-------------------------------------------------------------------------
138		// Minimum / Maximum access functions
139		//-------------------------------------------------------------------------
140
141
142	10.7k	int32_t PersianCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const {
143	10.7k	return kPersianCalendarLimits[field][limitType];
144	10.7k	}
145
146		//-------------------------------------------------------------------------
147		// Assorted calculation utilities
148		//
149
150		/**
151		* Determine whether a year is a leap year in the Persian calendar
152		*/
153		UBool PersianCalendar::isLeapYear(int32_t year)
154	18.8k	{
155	18.8k	if (year >= gMinCorrection && getLeapCorrection()->contains(year)) {
156	357	return false;
157	357	}
158	18.4k	if (year > gMinCorrection && getLeapCorrection()->contains(year-1)) {
159	943	return true;
160	943	}
161	17.5k	int64_t y = static_cast<int64_t>(year) * 25LL + 11LL;
162	17.5k	bool res = (y % 33L < 8);
163	17.5k	return res;
164	18.4k	}
165
166		/**
167		* Return the day # on which the given year starts. Days are counted
168		* from the Persian epoch, origin 0.
169		*/
170	0	int32_t PersianCalendar::yearStart(int32_t year, UErrorCode& status) {
171	0	return handleComputeMonthStart(year,0,false, status);
172	0	}
173
174		/**
175		* Return the day # on which the given month starts. Days are counted
176		* from the Persian epoch, origin 0.
177		*
178		* @param year The Persian year
179		* @param year The Persian month, 0-based
180		*/
181	0	int32_t PersianCalendar::monthStart(int32_t year, int32_t month, UErrorCode& status) const {
182	0	return handleComputeMonthStart(year,month,true, status);
183	0	}
184
185		//----------------------------------------------------------------------
186		// Calendar framework
187		//----------------------------------------------------------------------
188
189		/**
190		* Return the length (in days) of the given month.
191		*
192		* @param year The Persian year
193		* @param year The Persian month, 0-based
194		*/
195	3.28k	int32_t PersianCalendar::handleGetMonthLength(int32_t extendedYear, int32_t month, UErrorCode& /status/) const {
196		// If the month is out of range, adjust it into range, and
197		// modify the extended year value accordingly.
198	3.28k	if (month < 0 \|\| month > 11) {
199	69	extendedYear += ClockMath::floorDivide(month, 12, &month);
200	69	}
201
202	3.28k	return isLeapYear(extendedYear) ? kPersianLeapMonthLength[month] : kPersianMonthLength[month];
203	3.28k	}
204
205		/**
206		* Return the number of days in the given Persian year
207		*/
208	15.5k	int32_t PersianCalendar::handleGetYearLength(int32_t extendedYear, UErrorCode& status) const {
209	15.5k	if (U_FAILURE(status)) return 0;
210	15.5k	return isLeapYear(extendedYear) ? 366 : 365;
211	15.5k	}
212
213		//-------------------------------------------------------------------------
214		// Functions for converting from field values to milliseconds....
215		//-------------------------------------------------------------------------
216
217	22.3k	static int64_t firstJulianOfYear(int64_t year) {
218	22.3k	int64_t julianDay = 365LL * (year - 1LL) + ClockMath::floorDivide(8LL * year + 21, 33);
219	22.3k	if (year > gMinCorrection && getLeapCorrection()->contains(year-1)) {
220	880	julianDay--;
221	880	}
222	22.3k	return julianDay;
223	22.3k	}
224
225
226		// Return JD of start of given month/year
227	6.83k	int64_t PersianCalendar::handleComputeMonthStart(int32_t eyear, int32_t month, UBool /useMonth/, UErrorCode& status) const {
228	6.83k	if (U_FAILURE(status)) {
229	0	return 0;
230	0	}
231		// If the month is out of range, adjust it into range, and
232		// modify the extended year value accordingly.
233	6.83k	if (month < 0 \|\| month > 11) {
234	2.84k	if (uprv_add32_overflow(eyear, ClockMath::floorDivide(month, 12, &month), &eyear)) {
235	10	status = U_ILLEGAL_ARGUMENT_ERROR;
236	10	return 0;
237	10	}
238	2.84k	}
239
240	6.82k	int64_t julianDay = PERSIAN_EPOCH - 1LL + firstJulianOfYear(eyear);
241
242	6.82k	if (month != 0) {
243	3.75k	julianDay += kPersianNumDays[month];
244	3.75k	}
245
246	6.82k	return julianDay;
247	6.83k	}
248
249		//-------------------------------------------------------------------------
250		// Functions for converting from milliseconds to field values
251		//-------------------------------------------------------------------------
252
253	6.06k	int32_t PersianCalendar::handleGetExtendedYear(UErrorCode& status) {
254	6.06k	if (U_FAILURE(status)) {
255	0	return 0;
256	0	}
257	6.06k	if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
258	4.88k	return internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1
259	4.88k	}
260	1.17k	return internalGet(UCAL_YEAR, 1); // Default to year 1
261	6.06k	}
262
263		/**
264		* Override Calendar to compute several fields specific to the Persian
265		* calendar system. These are:
266		*
267		* <ul><li>ERA
268		* <li>YEAR
269		* <li>MONTH
270		* <li>DAY_OF_MONTH
271		* <li>DAY_OF_YEAR
272		* <li>EXTENDED_YEAR</ul>
273		*
274		* The DAY_OF_WEEK and DOW_LOCAL fields are already set when this
275		* method is called.
276		*/
277	15.5k	void PersianCalendar::handleComputeFields(int32_t julianDay, UErrorCode& status) {
278	15.5k	int64_t daysSinceEpoch = julianDay;
279	15.5k	daysSinceEpoch -= PERSIAN_EPOCH;
280
281	15.5k	int64_t year = ClockMath::floorDivideInt64(
282	15.5k	33LL * daysSinceEpoch + 3LL, 12053LL) + 1LL;
283	15.5k	if (year > INT32_MAX \|\| year < INT32_MIN) {
284	0	status = U_ILLEGAL_ARGUMENT_ERROR;
285	0	return;
286	0	}
287
288	15.5k	int64_t farvardin1 = firstJulianOfYear(year);
289
290	15.5k	int32_t dayOfYear = daysSinceEpoch - farvardin1; // 0-based
291	15.5k	U_ASSERT(dayOfYear >= 0);
292	15.5k	U_ASSERT(dayOfYear < 366);
293
294	15.5k	if (dayOfYear == 365 && year >= gMinCorrection && getLeapCorrection()->contains(year)) {
295	223	year++;
296	223	dayOfYear = 0;
297	223	}
298	15.5k	int32_t month;
299	15.5k	if (dayOfYear < 216) { // Compute 0-based month
300	10.1k	month = dayOfYear / 31;
301	10.1k	} else {
302	5.39k	month = (dayOfYear - 6) / 30;
303	5.39k	}
304	15.5k	U_ASSERT(month >= 0);
305	15.5k	U_ASSERT(month < 12);
306
307	15.5k	++dayOfYear; // Make it 1-based now
308	15.5k	int32_t dayOfMonth = dayOfYear - kPersianNumDays[month];
309	15.5k	U_ASSERT(dayOfMonth > 0);
310	15.5k	U_ASSERT(dayOfMonth <= 31);
311
312
313	15.5k	internalSet(UCAL_ERA, 0);
314	15.5k	internalSet(UCAL_YEAR, year);
315	15.5k	internalSet(UCAL_EXTENDED_YEAR, year);
316	15.5k	internalSet(UCAL_MONTH, month);
317	15.5k	internalSet(UCAL_ORDINAL_MONTH, month);
318	15.5k	internalSet(UCAL_DAY_OF_MONTH, dayOfMonth);
319	15.5k	internalSet(UCAL_DAY_OF_YEAR, dayOfYear);
320	15.5k	}
321
322		IMPL_SYSTEM_DEFAULT_CENTURY(PersianCalendar, "@calendar=persian")
323
324		UOBJECT_DEFINE_RTTI_IMPLEMENTATION(PersianCalendar)
325		int32_t
326	0	PersianCalendar::getRelatedYearDifference() const {
327	0	constexpr int32_t kPersianCalendarRelatedYearDifference = 622;
328	0	return kPersianCalendarRelatedYearDifference;
329	0	}
330
331		U_NAMESPACE_END
332
333		#endif