The Tor Browser: intl/icu/source/i18n/persncal.cpp@b8a032363ba2 (annotated)

intl/icu/source/i18n/persncal.cpp@b8a032363ba2 (annotated)

intl/icu/source/i18n/persncal.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
  ******************************************************************************
  * 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

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intl/icu/source/i18n/persncal.cpp@b8a032363ba2 (annotated)

intl/icu/source/i18n/persncal.cpp