1 /* 2 ****************************************************************************** 3 * Copyright (C) 2003-2008, International Business Machines Corporation 4 * and others. All Rights Reserved. 5 ****************************************************************************** 6 * 7 * File PERSNCAL.H 8 * 9 * Modification History: 10 * 11 * Date Name Description 12 * 9/23/2003 mehran posted to icu-design 13 ***************************************************************************** 14 */ 15 16 #ifndef PERSNCAL_H 17 #define PERSNCAL_H 18 19 #include "unicode/utypes.h" 20 21 #if !UCONFIG_NO_FORMATTING 22 23 #include "unicode/calendar.h" 24 25 U_NAMESPACE_BEGIN 26 27 /** 28 * <code>PersianCalendar</code> is a subclass of <code>Calendar</code> 29 * that implements the Persian calendar. It is used as the official 30 * calendar in Iran. This calendar is also known as the "Hijri Shamsi" 31 * calendar, since it starts at the time of Mohammed's emigration (or 32 * "hijra") to Medinah on Thursday, July 15, 622 AD (Julian) and is a 33 * solar calendar system (or "shamsi"). 34 * <p> 35 * The Persian calendar is strictly solar, and thus a Persian year has twelve 36 * solar months. A Persian year is about 365 days long, except in leap years 37 * which is 366 days long. 38 * <p> 39 * The six first months of Persian Calendar are 31 days long. The next five 40 * months are 30 days long. The last month is 29 days long in normal years, 41 * and 30 days long in leap years. 42 * 43 * @see GregorianCalendar 44 * 45 * @author Mehran Mehr 46 * @internal 47 */ 48 class PersianCalendar : public Calendar { 49 public: 50 //------------------------------------------------------------------------- 51 // Constants... 52 //------------------------------------------------------------------------- 53 /** 54 * Constants for the months 55 * @internal 56 */ 57 enum EMonths { 58 /** 59 * Constant for Farvardin, the 1st month of the Persian year. 60 * @internal 61 */ 62 FARVARDIN = 0, 63 64 /** 65 * Constant for Ordibehesht, the 2nd month of the Persian year. 66 * @internal 67 */ 68 ORDIBEHESHT = 1, 69 70 /** 71 * Constant for Khordad, the 3rd month of the Persian year. 72 * @internal 73 */ 74 KHORDAD = 2, 75 76 /** 77 * Constant for Tir, the 4th month of the Persian year. 78 * @internal 79 */ 80 TIR = 3, 81 82 /** 83 * Constant for Mordad, the 5th month of the Persian year. 84 * @internal 85 */ 86 MORDAD = 4, 87 88 /** 89 * Constant for Shahrivar, the 6th month of the Persian year. 90 * @internal 91 */ 92 SHAHRIVAR = 5, 93 94 /** 95 * Constant for Mehr, the 7th month of the Persian year. 96 * @internal 97 */ 98 MEHR = 6, 99 100 /** 101 * Constant for Aban, the 8th month of the Persian year. 102 * @internal 103 */ 104 ABAN = 7, 105 106 /** 107 * Constant for Azar, the 9th month of the Persian year. 108 * @internal 109 */ 110 AZAR = 8, 111 112 /** 113 * Constant for Dei, the 10th month of the Persian year. 114 * @internal 115 */ 116 DEI = 9, 117 118 /** 119 * Constant for Bahman, the 11th month of the Persian year. 120 * @internal 121 */ 122 BAHMAN = 10, 123 124 /** 125 * Constant for Esfand, the 12th month of the Persian year. 126 * @internal 127 */ 128 ESFAND = 11, 129 130 PERSIAN_MONTH_MAX 131 }; 132 133 134 135 //------------------------------------------------------------------------- 136 // Constructors... 137 //------------------------------------------------------------------------- 138 139 /** 140 * Constructs a PersianCalendar based on the current time in the default time zone 141 * with the given locale. 142 * 143 * @param aLocale The given locale. 144 * @param success Indicates the status of PersianCalendar object construction. 145 * Returns U_ZERO_ERROR if constructed successfully. 146 * @internal 147 */ 148 PersianCalendar(const Locale& aLocale, UErrorCode &success); 149 150 /** 151 * Copy Constructor 152 * @internal 153 */ 154 PersianCalendar(const PersianCalendar& other); 155 156 /** 157 * Destructor. 158 * @internal 159 */ 160 virtual ~PersianCalendar(); 161 162 // TODO: copy c'tor, etc 163 164 // clone 165 virtual Calendar* clone() const; 166 167 private: 168 /** 169 * Determine whether a year is a leap year in the Persian calendar 170 */ 171 static UBool isLeapYear(int32_t year); 172 173 /** 174 * Return the day # on which the given year starts. Days are counted 175 * from the Hijri epoch, origin 0. 176 */ 177 int32_t yearStart(int32_t year); 178 179 /** 180 * Return the day # on which the given month starts. Days are counted 181 * from the Hijri epoch, origin 0. 182 * 183 * @param year The hijri shamsi year 184 * @param year The hijri shamsi month, 0-based 185 */ 186 int32_t monthStart(int32_t year, int32_t month) const; 187 188 //---------------------------------------------------------------------- 189 // Calendar framework 190 //---------------------------------------------------------------------- 191 protected: 192 /** 193 * @internal 194 */ 195 virtual int32_t handleGetLimit(UCalendarDateFields field, ELimitType limitType) const; 196 197 /** 198 * Return the length (in days) of the given month. 199 * 200 * @param year The hijri shamsi year 201 * @param year The hijri shamsi month, 0-based 202 * @internal 203 */ 204 virtual int32_t handleGetMonthLength(int32_t extendedYear, int32_t month) const; 205 206 /** 207 * Return the number of days in the given Persian year 208 * @internal 209 */ 210 virtual int32_t handleGetYearLength(int32_t extendedYear) const; 211 212 //------------------------------------------------------------------------- 213 // Functions for converting from field values to milliseconds.... 214 //------------------------------------------------------------------------- 215 216 // Return JD of start of given month/year 217 /** 218 * @internal 219 */ 220 virtual int32_t handleComputeMonthStart(int32_t eyear, int32_t month, UBool useMonth) const; 221 222 //------------------------------------------------------------------------- 223 // Functions for converting from milliseconds to field values 224 //------------------------------------------------------------------------- 225 226 /** 227 * @internal 228 */ 229 virtual int32_t handleGetExtendedYear(); 230 231 /** 232 * Override Calendar to compute several fields specific to the Persian 233 * calendar system. These are: 234 * 235 * <ul><li>ERA 236 * <li>YEAR 237 * <li>MONTH 238 * <li>DAY_OF_MONTH 239 * <li>DAY_OF_YEAR 240 * <li>EXTENDED_YEAR</ul> 241 * 242 * The DAY_OF_WEEK and DOW_LOCAL fields are already set when this 243 * method is called. The getGregorianXxx() methods return Gregorian 244 * calendar equivalents for the given Julian day. 245 * @internal 246 */ 247 virtual void handleComputeFields(int32_t julianDay, UErrorCode &status); 248 249 // UObject stuff 250 public: 251 /** 252 * @return The class ID for this object. All objects of a given class have the 253 * same class ID. Objects of other classes have different class IDs. 254 * @internal 255 */ 256 virtual UClassID getDynamicClassID(void) const; 257 258 /** 259 * Return the class ID for this class. This is useful only for comparing to a return 260 * value from getDynamicClassID(). For example: 261 * 262 * Base* polymorphic_pointer = createPolymorphicObject(); 263 * if (polymorphic_pointer->getDynamicClassID() == 264 * Derived::getStaticClassID()) ... 265 * 266 * @return The class ID for all objects of this class. 267 * @internal 268 */ 269 U_I18N_API static UClassID U_EXPORT2 getStaticClassID(void); 270 271 /** 272 * return the calendar type, "persian". 273 * 274 * @return calendar type 275 * @internal 276 */ 277 virtual const char * getType() const; 278 279 private: 280 PersianCalendar(); // default constructor not implemented 281 282 protected: 283 284 /** 285 * (Overrides Calendar) Return true if the current date for this Calendar is in 286 * Daylight Savings Time. Recognizes DST_OFFSET, if it is set. 287 * 288 * @param status Fill-in parameter which receives the status of this operation. 289 * @return True if the current date for this Calendar is in Daylight Savings Time, 290 * false, otherwise. 291 * @internal 292 */ 293 virtual UBool inDaylightTime(UErrorCode& status) const; 294 295 /** 296 * Returns TRUE because the Persian Calendar does have a default century 297 * @internal 298 */ 299 virtual UBool haveDefaultCentury() const; 300 301 /** 302 * Returns the date of the start of the default century 303 * @return start of century - in milliseconds since epoch, 1970 304 * @internal 305 */ 306 virtual UDate defaultCenturyStart() const; 307 308 /** 309 * Returns the year in which the default century begins 310 * @internal 311 */ 312 virtual int32_t defaultCenturyStartYear() const; 313 314 private: // default century stuff. 315 /** 316 * The system maintains a static default century start date. This is initialized 317 * the first time it is used. Before then, it is set to SYSTEM_DEFAULT_CENTURY to 318 * indicate an uninitialized state. Once the system default century date and year 319 * are set, they do not change. 320 */ 321 static UDate fgSystemDefaultCenturyStart; 322 323 /** 324 * See documentation for systemDefaultCenturyStart. 325 */ 326 static int32_t fgSystemDefaultCenturyStartYear; 327 328 /** 329 * Default value that indicates the defaultCenturyStartYear is unitialized 330 */ 331 static const int32_t fgSystemDefaultCenturyYear; 332 333 /** 334 * start of default century, as a date 335 */ 336 static const UDate fgSystemDefaultCentury; 337 338 /** 339 * Returns the beginning date of the 100-year window that dates 340 * with 2-digit years are considered to fall within. 341 */ 342 UDate internalGetDefaultCenturyStart(void) const; 343 344 /** 345 * Returns the first year of the 100-year window that dates with 346 * 2-digit years are considered to fall within. 347 */ 348 int32_t internalGetDefaultCenturyStartYear(void) const; 349 350 /** 351 * Initializes the 100-year window that dates with 2-digit years 352 * are considered to fall within so that its start date is 80 years 353 * before the current time. 354 */ 355 static void initializeSystemDefaultCentury(void); 356 }; 357 358 U_NAMESPACE_END 359 360 #endif 361 #endif 362 363 364 365
