class/corlib/System.Globalization/UmAlQuraCalendar.cs

   1 // System.Globalization.UmAlQuraCalendar.cs
   2 //
   3 // Authors:
   4 //      Ulrich Kunitz
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 // (C) Ulrich Kunitz 2002
   8 // Copyright (C) 2007 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 //
  31 // This code is almost a copy of HijriCalendar, except that
  32 // - it does not support HijriAdjustment.
  33 // - HijriEra->UmAlQuraEra.
  34 //
  35
  36 namespace System.Globalization {
  37
  38 using System;
  39 using System.IO;
  40
  41
  42 /// <summary>
  43 /// This is the Hijri calendar which might be called Islamic calendar.
  44 /// </summary>
  45 /// <remarks>
  46 /// <para>The calendar supports only dates in the UmAlQuraEra starting with the
  47 /// epoch.
  48 /// </para>
  49 /// <para>
  50 /// The epoch of the Hijri Calendar might be adjusted by the
  51 /// <see cref="F:System.Globalization.HijriCalendar.AddHijriDate"/>
  52 /// property. See the discussion of the
  53 /// <see cref="F:CalendricalCalculations.HijriCalendar.epoch">
  54 /// epoch
  55 /// </see>
  56 /// of the Hijri calendar.
  57 /// </para>
  58 /// <para>The implementation uses the
  59 /// <see cref="N:CalendricalCalculations"/> namespace.
  60 /// </para>
  61 /// </remarks>
  62 [Serializable]
  63 [MonoTODO ("Serialization format not compatible with .NET")]
  64 public class UmAlQuraCalendar : Calendar {
  65         /// <summary>
  66         /// Constructor.
  67         /// </summary>
  68         public UmAlQuraCalendar() {
  69                 M_AbbrEraNames = new string[] {"A.H."};
  70                 M_EraNames = new string[] {"Anno Hegirae"};
  71                 if (twoDigitYearMax == 99)
  72                         twoDigitYearMax = 1451;
  73         }
  74
  75         /// <summary>
  76         /// The era number for the Anno Hegirae (A.H.) era.
  77         /// </summary>
  78         public const int UmAlQuraEra = 1;
  79
  80         /// <summary>
  81         /// The minimum fixed day number supported by the Hijri calendar.
  82         /// </summary>
  83         internal static readonly int M_MinFixed =
  84                 CCHijriCalendar.fixed_from_dmy(1, 1, 1);
  85         /// <summary>
  86         /// The maximum fixed day number supported by the Hijri calendar.
  87         /// </summary>
  88         internal static readonly int M_MaxFixed =
  89                 CCGregorianCalendar.fixed_from_dmy(31, 12, 9999);
  90
  91         /// <value>Overridden. Gives the eras supported by the Gregorian
  92         /// calendar as an array of integers.
  93         /// </value>
  94         public override int[] Eras {
  95                 get {
  96                         return new int[] { UmAlQuraEra };
  97                 }
  98         }
  99
 100         // FIXME: [MonoTODO ("Add call into operating system")]
 101         public override int TwoDigitYearMax
 102         {
 103                 get {
 104                         return twoDigitYearMax;
 105                 }
 106                 set {
 107                         CheckReadOnly ();
 108                         M_ArgumentInRange ("value", value, 100, M_MaxYear);
 109
 110                         twoDigitYearMax = value;
 111                 }
 112         }
 113
 114         /// <summary>
 115         /// Protected field storing the
 116         /// <see cref="F:AddHijriDate"/>.
 117         /// </summary>
 118         internal int M_AddHijriDate = 0;
 119
 120         // TODO: I don't know currently, which sign to use with the parameter.
 121         /// <value>An integer property representing the adjustment to the epoch
 122         /// of the Hijri calendar. Not supported by .NET.
 123         /// </value>
 124         internal virtual int AddHijriDate {
 125                 get {
 126                         return M_AddHijriDate;
 127                 }
 128                 set {
 129                         CheckReadOnly ();
 130                         if (value < -3 && value > 3)
 131                                 throw new ArgumentOutOfRangeException(
 132                                         "AddHijriDate",
 133                                         "Value should be between -3 and 3.");
 134                         M_AddHijriDate = value;
 135                 }
 136         }
 137
 138         /// <summary>
 139         /// A protected method checking an
 140         /// <see cref="F:AddHijriDate"/> adjusted fixed day number.
 141         /// </summary>
 142         /// <param name="param">A string giving the name of the parameter
 143         /// to check.</param>
 144         /// <param name="rdHijri">An integer giving the AddHijriDate adjusted
 145         /// fixed day number.
 146         /// </param>
 147         /// <exception cref="T:System.ArgumentOutOfRangeException">
 148         /// Exception is thrown, if the AddHijriDate adjusted fixed day
 149         /// number is outside the supported range.
 150         /// </exception>
 151         internal void M_CheckFixedHijri(string param, int rdHijri) {
 152                 if (rdHijri < M_MinFixed || rdHijri > M_MaxFixed-AddHijriDate) {
 153                         StringWriter sw = new StringWriter();
 154                         int day, month, year;
 155                         CCHijriCalendar.dmy_from_fixed(out day, out month,
 156                                 out year, M_MaxFixed-AddHijriDate);
 157                         if (AddHijriDate != 0) {
 158                                 sw.Write("This HijriCalendar " +
 159                                         "(AddHijriDate {0})" +
 160                                         " allows dates from 1. 1. 1 to " +
 161                                         "{1}. {2}. {3}.",
 162                                         AddHijriDate,
 163                                         day, month, year);
 164                         } else {
 165                                 sw.Write("HijriCalendar allows dates from " +
 166                                         "1.1.1 to {0}.{1}.{2}.",
 167                                         day, month, year);
 168                         }
 169                         throw new ArgumentOutOfRangeException(param,
 170                                 sw.ToString());
 171                 }
 172         }
 173
 174         /// <summary>
 175         /// A protected member checking a
 176         /// <see cref="T:System.DateTime"/> value.
 177         /// </summary>
 178         /// <param name="time">The
 179         /// <see cref="T:System.DateTime"/>
 180         /// to check.
 181         /// </param>
 182         /// <exception cref="T:System.ArgumentOutOfRangeException">
 183         /// The exception is thrown if the
 184         /// <see cref="T:System.DateTime"/> parameter is not in the supported
 185         /// range of the Hijri calendar.
 186         /// </exception>
 187         internal void M_CheckDateTime(DateTime time) {
 188                 int rd = CCFixed.FromDateTime(time) - AddHijriDate;
 189                 M_CheckFixedHijri("time", rd);
 190         }
 191
 192         /// <summary>
 193         /// Protected member which computes the
 194         /// <see cref="F:AddHijriDate"/>
 195         /// adjusted fixed day number from a
 196         /// <see cref="T:System.DateTime"/>.
 197         /// </summary>
 198         /// <param name="time">The
 199         /// <see cref="T:System.DateTime"/>
 200         /// to convert.
 201         /// </param>
 202         /// <returns>The
 203         /// <see cref="F:AddHijriDate"/> adjusted fixed day number.
 204         /// </returns>
 205         internal int M_FromDateTime(DateTime time) {
 206                 return CCFixed.FromDateTime(time) - AddHijriDate;
 207         }
 208
 209         /// <summary>
 210         /// Protected member which converts the
 211         /// <see cref="F:AddHijriDate"/>
 212         /// adjusted fixed day number the a
 213         /// <see cref="T:System.DateTime"/> value.
 214         /// </summary>
 215         /// <param name="rd">The
 216         /// <see cref="F:AddHijriDate"/> adjusted fixed day number.
 217         /// </param>
 218         /// <returns>The converted
 219         /// <see cref="T:System.DateTime"/> value.
 220         /// </returns>
 221         internal DateTime M_ToDateTime(int rd) {
 222                 return CCFixed.ToDateTime(rd+AddHijriDate);
 223         }
 224
 225         /// <summary>
 226         /// Protected member which converts the
 227         /// <see cref="F:AddHijriDate"/>
 228         /// adjusted fixed day number the a
 229         /// <see cref="T:System.DateTime"/> value using a number
 230         /// of time parameters.
 231         /// </summary>
 232         /// <param name="date">The
 233         /// <see cref="F:AddHijriDate"/> adjusted fixed day number.
 234         /// </param>
 235         /// <param name="hour">An integer that specifies the hour.
 236         /// </param>
 237         /// <param name="minute">An integer that specifies the minute.
 238         /// </param>
 239         /// <param name="second">An integer that gives the second.
 240         /// </param>
 241         /// <param name="milliseconds">An integer that gives the
 242         /// milliseconds.
 243         /// </param>
 244         /// <returns>The converted
 245         /// <see cref="T:System.DateTime"/> value.
 246         /// </returns>
 247         internal DateTime M_ToDateTime(int date,
 248                 int hour, int minute, int second, int milliseconds)
 249         {
 250                 return CCFixed.ToDateTime(date+AddHijriDate,
 251                         hour, minute, second, milliseconds);
 252         }
 253
 254         /// <summary>
 255         /// A protected method checking the era number.
 256         /// </summary>
 257         /// <param name="era">The era number.</param>
 258         /// <exception name="T:System.ArgumentException">
 259         /// The exception is thrown if the era is not equal
 260         /// <see cref="F:UmAlQuraEra"/>.
 261         /// </exception>
 262         internal void M_CheckEra(ref int era) {
 263                 if (era == CurrentEra)
 264                         era = UmAlQuraEra;
 265                 if (era != UmAlQuraEra)
 266                         throw new ArgumentException("Era value was not valid.");
 267         }
 268
 269         /// <summary>
 270         /// A protected method checking calendar year and the era number.
 271         /// </summary>
 272         /// <param name="year">An integer representing the calendar year.
 273         /// </param>
 274         /// <param name="era">The era number.</param>
 275         /// <exception cref="T:System.ArgumentException">
 276         /// The exception is thrown if the era is not equal
 277         /// <see cref="F:UmAlQuraEra"/>.
 278         /// </exception>
 279         /// <exception cref="T:System.ArgumentOutOfRangeException">
 280         /// The exception is thrown if the calendar year is outside of
 281         /// the allowed range.
 282         /// </exception>
 283         internal override void M_CheckYE(int year, ref int era) {
 284                 M_CheckEra(ref era);
 285                 M_ArgumentInRange("year", year, 1, 9666);
 286         }
 287
 288         /// <summary>
 289         /// A protected method checking the calendar year, month, and
 290         /// era number.
 291         /// </summary>
 292         /// <param name="year">An integer representing the calendar year.
 293         /// </param>
 294         /// <param name="month">An integer giving the calendar month.
 295         /// </param>
 296         /// <param name="era">The era number.</param>
 297         /// <exception cref="T:System.ArgumentException">
 298         /// The exception is thrown if the era is not equal
 299         /// <see cref="F:UmAlQuraEra"/>.
 300         /// </exception>
 301         /// <exception cref="T:System.ArgumentOutOfRangeException">
 302         /// The exception is thrown if the calendar year or month is
 303         /// outside of the allowed range.
 304         /// </exception>
 305         internal void M_CheckYME(int year, int month, ref int era) {
 306                 M_CheckYE(year, ref era);
 307                 if (month < 1 || month > 12)
 308                         throw new ArgumentOutOfRangeException("month",
 309                                 "Month must be between one and twelve.");
 310                 if (year == 9666) {
 311                         int rd = CCHijriCalendar.fixed_from_dmy(1, month, year);
 312                         M_CheckFixedHijri("month", rd);
 313                 }
 314         }
 315
 316         /// <summary>
 317         /// A protected method checking the calendar day, month, and year
 318         /// and the era number.
 319         /// </summary>
 320         /// <param name="year">An integer representing the calendar year.
 321         /// </param>
 322         /// <param name="month">An integer giving the calendar month.
 323         /// </param>
 324         /// <param name="day">An integer giving the calendar day.
 325         /// </param>
 326         /// <param name="era">The era number.</param>
 327         /// <exception cref="T:System.ArgumentException">
 328         /// The exception is thrown if the era is not equal
 329         /// <see cref="F:UmAlQuraEra"/>.
 330         /// </exception>
 331         /// <exception cref="T:System.ArgumentOutOfRangeException">
 332         /// The exception is thrown if the calendar year, month, or day is
 333         /// outside of the allowed range.
 334         /// </exception>
 335         internal void M_CheckYMDE(int year, int month, int day, ref int era)
 336         {
 337                 M_CheckYME(year, month, ref era);
 338                 M_ArgumentInRange("day", day, 1,
 339                         GetDaysInMonth(year, month, UmAlQuraEra));
 340                 if (year == 9666) {
 341                         int rd = CCHijriCalendar.fixed_from_dmy(day, month,
 342                                 year);
 343                         M_CheckFixedHijri("day", rd);
 344                 }
 345         }
 346
 347 #if false
 348         //
 349         // The following routines are commented out as they do not appear on the .NET Framework 1.1
 350         //
 351
 352         /// <summary>
 353         /// Overridden. Adds days to a given date.
 354         /// </summary>
 355         /// <param name="time">The
 356         /// <see cref="T:System.DateTime"/> to which to add
 357         /// days.
 358         /// </param>
 359         /// <param name="days">The number of days to add.</param>
 360         /// <returns>A new <see cref="T:System.DateTime"/> value, that
 361         /// results from adding <paramref name="days"/> to the specified
 362         /// DateTime.</returns>
 363         /// <exception cref="T:System.ArgumentOutOfRangeException">
 364         /// The exception is thrown if the
 365         /// <see cref="T:System.DateTime"/> return value is not in the
 366         /// supported range of the Hijri calendar.
 367         /// </exception>
 368         public override DateTime AddDays(DateTime time, int days) {
 369                 DateTime t = base.AddDays(time, days);
 370                 M_CheckDateTime(t);
 371                 return t;
 372         }
 373
 374         /// <summary>
 375         /// Overridden. Adds hours to a given date.
 376         /// </summary>
 377         /// <param name="time">The
 378         /// <see cref="T:System.DateTime"/> to which to add
 379         /// hours.
 380         /// </param>
 381         /// <param name="hours">The number of hours to add.</param>
 382         /// <returns>A new <see cref="T:System.DateTime"/> value, that
 383         /// results from adding <paramref name="hours"/> to the specified
 384         /// DateTime.</returns>
 385         /// <exception cref="T:System.ArgumentOutOfRangeException">
 386         /// The exception is thrown if the
 387         /// <see cref="T:System.DateTime"/> return value is not in the
 388         /// supported range of the Hijri calendar.
 389         /// </exception>
 390         public override DateTime AddHours(DateTime time, int hours) {
 391                 DateTime t = base.AddHours(time, hours);
 392                 M_CheckDateTime(t);
 393                 return t;
 394         }
 395
 396         /// <summary>
 397         /// Overridden. Adds milliseconds to a given date.
 398         /// </summary>
 399         /// <param name="time">The
 400         /// <see cref="T:System.DateTime"/> to which to add
 401         /// milliseconds.
 402         /// </param>
 403         /// <param name="milliseconds">The number of milliseconds given as
 404         /// double to add. Keep in mind the 100 nanosecond resolution of
 405         /// <see cref="T:System.DateTime"/>.
 406         /// </param>
 407         /// <returns>A new <see cref="T:System.DateTime"/> value, that
 408         /// results from adding <paramref name="milliseconds"/> to the specified
 409         /// DateTime.</returns>
 410         /// <exception cref="T:System.ArgumentOutOfRangeException">
 411         /// The exception is thrown if the
 412         /// <see cref="T:System.DateTime"/> return value is not in the
 413         /// supported range of the Hijri calendar.
 414         /// </exception>
 415         public override DateTime AddMilliseconds(DateTime time,
 416                 double milliseconds)
 417         {
 418                 DateTime t = base.AddMilliseconds(time, milliseconds);
 419                 M_CheckDateTime(t);
 420                 return t;
 421         }
 422
 423         /// <summary>
 424         /// Overridden. Adds minutes to a given date.
 425         /// </summary>
 426         /// <param name="time">The
 427         /// <see cref="T:System.DateTime"/> to which to add
 428         /// minutes.
 429         /// </param>
 430         /// <param name="minutes">The number of minutes to add.</param>
 431         /// <returns>A new <see cref="T:System.DateTime"/> value, that
 432         /// results from adding <paramref name="minutes"/> to the specified
 433         /// DateTime.</returns>
 434         /// <exception cref="T:System.ArgumentOutOfRangeException">
 435         /// The exception is thrown if the
 436         /// <see cref="T:System.DateTime"/> return value is not in the
 437         /// supported range of the Hijri calendar.
 438         /// </exception>
 439         public override DateTime AddMinutes(DateTime time, int minutes) {
 440                 DateTime t = base.AddMinutes(time, minutes);
 441                 M_CheckDateTime(t);
 442                 return t;
 443         }
 444
 445         /// <summary>
 446         /// Overridden. Adds seconds to a given date.
 447         /// </summary>
 448         /// <param name="time">The
 449         /// <see cref="T:System.DateTime"/> to which to add
 450         /// seconds.
 451         /// </param>
 452         /// <param name="seconds">The number of seconds to add.</param>
 453         /// <returns>A new <see cref="T:System.DateTime"/> value, that
 454         /// results from adding <paramref name="seconds"/> to the specified
 455         /// DateTime.</returns>
 456         /// <exception cref="T:System.ArgumentOutOfRangeException">
 457         /// The exception is thrown if the
 458         /// <see cref="T:System.DateTime"/> return value is not in the
 459         /// supported range of the Hijri calendar.
 460         /// </exception>
 461         public override DateTime AddSeconds(DateTime time, int seconds) {
 462                 DateTime t = base.AddSeconds(time, seconds);
 463                 M_CheckDateTime(t);
 464                 return t;
 465         }
 466
 467         /// <summary>
 468         /// Overridden. Adds weeks to a given date.
 469         /// </summary>
 470         /// <param name="time">The
 471         /// <see cref="T:System.DateTime"/> to which to add
 472         /// weeks.
 473         /// </param>
 474         /// <param name="weeks">The number of weeks to add.</param>
 475         /// <returns>A new <see cref="T:System.DateTime"/> value, that
 476         /// results from adding <paramref name="weeks"/> to the specified
 477         /// DateTime.</returns>
 478         /// <exception cref="T:System.ArgumentOutOfRangeException">
 479         /// The exception is thrown if the
 480         /// <see cref="T:System.DateTime"/> return value is not in the
 481         /// supported range of the Hijri calendar.
 482         /// </exception>
 483         public override DateTime AddWeeks(DateTime time, int weeks) {
 484                 DateTime t = base.AddWeeks(time, weeks);
 485                 M_CheckDateTime(t);
 486                 return t;
 487         }
 488
 489         /// <summary>
 490         /// Overridden. Gives the hour of the specified time.
 491         /// </summary>
 492         /// <param name="time">The
 493         /// <see cref="T:System.DateTime"/> that specifies the
 494         /// time.
 495         /// </param>
 496         /// <returns>An integer that gives the hour of the specified time,
 497         /// starting with 0.</returns>
 498         /// <exception cref="T:System.ArgumentOutOfRangeException">
 499         /// The exception is thrown if the
 500         /// <see cref="T:System.DateTime"/> parameter is not in the
 501         /// supported range of the Hijri calendar.
 502         /// </exception>
 503         public override int GetHour(DateTime time) {
 504                 M_CheckDateTime(time);
 505                 return base.GetHour(time);
 506         }
 507
 508         /// <summary>
 509         /// Overridden. Gives the milliseconds in the current second
 510         /// of the specified time.
 511         /// </summary>
 512         /// <param name="time">The
 513         /// <see cref="T:System.DateTime"/> that specifies the
 514         /// time.
 515         /// </param>
 516         /// <returns>An integer that gives the milliseconds in the seconds
 517         /// of the specified time, starting with 0.</returns>
 518         /// <exception cref="T:System.ArgumentOutOfRangeException">
 519         /// The exception is thrown if the
 520         /// <see cref="T:System.DateTime"/> parameter is not in the
 521         /// supported range of the Hijri calendar.
 522         /// </exception>
 523         public override double GetMilliseconds(DateTime time) {
 524                 M_CheckDateTime(time);
 525                 return base.GetMilliseconds(time);
 526         }
 527
 528         /// <summary>
 529         /// Overridden. Gives the minute of the specified time.
 530         /// </summary>
 531         /// <param name="time">The
 532         /// <see cref="T:System.DateTime"/> that specifies the
 533         /// time.
 534         /// </param>
 535         /// <returns>An integer that gives the minute of the specified time,
 536         /// starting with 0.</returns>
 537         /// <exception cref="T:System.ArgumentOutOfRangeException">
 538         /// The exception is thrown if the
 539         /// <see cref="T:System.DateTime"/> parameter is not in the
 540         /// supported range of the Hijri calendar.
 541         /// </exception>
 542         public override int GetMinute(DateTime time) {
 543                 M_CheckDateTime(time);
 544                 return base.GetMinute(time);
 545         }
 546
 547         /// <summary>
 548         /// Overridden. Gives the second of the specified time.
 549         /// </summary>
 550         /// <param name="time">The
 551         /// <see cref="T:System.DateTime"/> that specifies the
 552         /// time.
 553         /// </param>
 554         /// <returns>An integer that gives the second of the specified time,
 555         /// starting with 0.</returns>
 556         /// <exception cref="T:System.ArgumentOutOfRangeException">
 557         /// The exception is thrown if the
 558         /// <see cref="T:System.DateTime"/> parameter is not in the
 559         /// supported range of the Hijri calendar.
 560         /// </exception>
 561         public override int GetSecond(DateTime time) {
 562                 M_CheckDateTime(time);
 563                 return base.GetMinute(time);
 564         }
 565 #endif
 566
 567         /// <summary>
 568         /// Overrideden. Adds months to a given date.
 569         /// </summary>
 570         /// <param name="time">The
 571         /// <see cref="T:System.DateTime"/> to which to add
 572         /// months.
 573         /// </param>
 574         /// <param name="months">The number of months to add.</param>
 575         /// <returns>A new <see cref="T:System.DateTime"/> value, that
 576         /// results from adding <paramref name="months"/> to the specified
 577         /// DateTime.</returns>
 578         /// <exception cref="T:System.ArgumentOutOfRangeException">
 579         /// The exception is thrown if the
 580         /// <see cref="T:System.DateTime"/> return value is not in the
 581         /// supported range of the Hijri calendar.
 582         /// </exception>
 583         public override DateTime AddMonths(DateTime time, int months) {
 584                 int rd = M_FromDateTime(time);
 585                 int day, month, year;
 586                 CCHijriCalendar.dmy_from_fixed(
 587                         out day, out month, out year, rd);
 588                 month += months;
 589                 year += CCMath.div_mod(out month, month, 12);
 590                 rd = CCHijriCalendar.fixed_from_dmy(day, month, year);
 591                 M_CheckFixedHijri("time", rd);
 592                 DateTime t = M_ToDateTime(rd);
 593                 return t.Add(time.TimeOfDay);
 594         }
 595
 596         /// <summary>
 597         /// Overrideden. Adds years to a given date.
 598         /// </summary>
 599         /// <param name="time">The
 600         /// <see cref="T:System.DateTime"/> to which to add
 601         /// years.
 602         /// </param>
 603         /// <param name="years">The number of years to add.</param>
 604         /// <returns>A new <see cref="T:System.DateTime"/> value, that
 605         /// results from adding <paramref name="years"/> to the specified
 606         /// DateTime.</returns>
 607         /// <exception cref="T:System.ArgumentOutOfRangeException">
 608         /// The exception is thrown if the
 609         /// <see cref="T:System.DateTime"/> return value is not in the
 610         /// supported range of the Hijri calendar.
 611         /// </exception>
 612         public override DateTime AddYears(DateTime time, int years) {
 613                 int rd = M_FromDateTime(time);
 614                 int day, month, year;
 615                 CCHijriCalendar.dmy_from_fixed(
 616                         out day, out month, out year, rd);
 617                 year += years;
 618                 rd = CCHijriCalendar.fixed_from_dmy(day, month, year);
 619                 M_CheckFixedHijri("time", rd);
 620                 DateTime t = M_ToDateTime(rd);
 621                 return t.Add(time.TimeOfDay);
 622         }
 623
 624         /// <summary>
 625         /// Overriden. Gets the day of the month from
 626         /// <paramref name="time"/>.
 627         /// </summary>
 628         /// <param name="time">The
 629         /// <see cref="T:System.DateTime"/> that specifies a
 630         /// date.
 631         /// </param>
 632         /// <returns>An integer giving the day of months, starting with 1.
 633         /// </returns>
 634         /// <exception cref="T:System.ArgumentOutOfRangeException">
 635         /// The exception is thrown if the
 636         /// <see cref="T:System.DateTime"/> parameter is not in the
 637         /// supported range of the Hijri calendar.
 638         /// </exception>
 639         public override int GetDayOfMonth(DateTime time) {
 640                 int rd = M_FromDateTime(time);
 641                 M_CheckFixedHijri("time", rd);
 642                 return CCHijriCalendar.day_from_fixed(rd);
 643         }
 644
 645         /// <summary>
 646         /// Overriden. Gets the day of the week from the specified date.
 647         /// </summary>
 648         /// <param name="time">The
 649         /// <see cref="T:System.DateTime"/> that specifies a
 650         /// date.
 651         /// </param>
 652         /// <returns>An integer giving the day of months, starting with 1.
 653         /// </returns>
 654         /// <exception cref="T:System.ArgumentOutOfRangeException">
 655         /// The exception is thrown if the
 656         /// <see cref="T:System.DateTime"/> parameter is not in the
 657         /// supported range of the Hijri calendar.
 658         /// </exception>
 659         public override DayOfWeek GetDayOfWeek(DateTime time) {
 660                 int rd = M_FromDateTime(time);
 661                 M_CheckFixedHijri("time", rd);
 662                 return (DayOfWeek)CCFixed.day_of_week(rd);
 663         }
 664
 665         /// <summary>
 666         /// Overridden. Gives the number of the day in the year.
 667         /// </summary>
 668         /// <param name="time">The
 669         /// <see cref="T:System.DateTime"/> that specifies a
 670         /// date.
 671         /// </param>
 672         /// <returns>An integer representing the day of the year,
 673         /// starting with 1.</returns>
 674         /// <exception cref="T:System.ArgumentOutOfRangeException">
 675         /// The exception is thrown if the
 676         /// <see cref="T:System.DateTime"/> parameter is not in the
 677         /// supported range of the Hijri calendar.
 678         /// </exception>
 679         public override int GetDayOfYear(DateTime time) {
 680                 int rd = M_FromDateTime(time);
 681                 M_CheckFixedHijri("time", rd);
 682                 int year = CCHijriCalendar.year_from_fixed(rd);
 683                 int rd1_1 = CCHijriCalendar.fixed_from_dmy(1, 1, year);
 684                 return rd - rd1_1 + 1;
 685         }
 686
 687         /// <summary>
 688         /// Overridden. Gives the number of days in the specified month
 689         /// of the given year and era.
 690         /// </summary>
 691         /// <param name="year">An integer that gives the year.
 692         /// </param>
 693         /// <param name="month">An integer that gives the month, starting
 694         /// with 1.</param>
 695         /// <param name="era">An intger that gives the era of the specified
 696         /// year.</param>
 697         /// <returns>An integer that gives the number of days of the
 698         /// specified month.</returns>
 699         /// <exception cref="T:System.ArgumentOutOfRangeException">
 700         /// The exception is thrown, if <paramref name="month"/>,
 701         /// <paramref name="year"/> ,or <paramref name="era"/> is outside
 702         /// the allowed range.
 703         /// </exception>
 704         public override int GetDaysInMonth(int year, int month, int era) {
 705                 M_CheckYME(year, month, ref era);
 706                 int rd1 = CCHijriCalendar.fixed_from_dmy(1, month, year);
 707                 int rd2 = CCHijriCalendar.fixed_from_dmy(1, month+1, year);
 708                 return rd2 - rd1;
 709         }
 710
 711         /// <summary>
 712         /// Overridden. Gives the number of days of the specified
 713         /// year of the given era.
 714         /// </summary>
 715         /// <param name="year">An integer that specifies the year.
 716         /// </param>
 717         /// <param name="era">An ineger that specifies the era.
 718         /// </param>
 719         /// <returns>An integer that gives the number of days of the
 720         /// specified year.</returns>
 721         /// <exception cref="T:System.ArgumentOutOfRangeExceiption">
 722         /// The exception is thrown, if
 723         /// <paramref name="year"/> is outside the allowed range.
 724         /// </exception>
 725         public override int GetDaysInYear(int year, int era) {
 726                 M_CheckYE(year, ref era);
 727                 int rd1 = CCHijriCalendar.fixed_from_dmy(1, 1, year);
 728                 int rd2 = CCHijriCalendar.fixed_from_dmy(1, 1, year+1);
 729                 return rd2 - rd1;
 730         }
 731
 732
 733         /// <summary>
 734         /// Overridden. Gives the era of the specified date.
 735         /// </summary>
 736         /// <param name="time">The
 737         /// <see cref="T:System.DateTime"/> that specifies a
 738         /// date.
 739         /// </param>
 740         /// <returns>An integer representing the era of the calendar.
 741         /// </returns>
 742         /// <exception cref="T:System.ArgumentOutOfRangeException">
 743         /// The exception is thrown if the
 744         /// <see cref="T:System.DateTime"/> parameter is not in the
 745         /// supported range of the Hijri calendar.
 746         /// </exception>
 747         public override int GetEra(DateTime time) {
 748                 M_CheckDateTime(time);
 749                 return UmAlQuraEra;
 750         }
 751
 752         public override int GetLeapMonth (int year, int era)
 753         {
 754                 return 0;
 755         }
 756
 757         /// <summary>
 758         /// Overridden. Gives the number of the month of the specified
 759         /// date.
 760         /// </summary>
 761         /// <param name="time">The
 762         /// <see cref="T:System.DateTime"/> that specifies a
 763         /// date.
 764         /// </param>
 765         /// <returns>An integer representing the month,
 766         /// starting with 1.</returns>
 767         /// <exception cref="T:System.ArgumentOutOfRangeException">
 768         /// The exception is thrown if the
 769         /// <see cref="T:System.DateTime"/> parameter is not in the
 770         /// supported range of the Hijri calendar.
 771         /// </exception>
 772         public override int GetMonth(DateTime time) {
 773                 int rd = M_FromDateTime(time);
 774                 M_CheckFixedHijri("time", rd);
 775                 return CCHijriCalendar.month_from_fixed(rd);
 776         }
 777
 778         /// <summary>
 779         /// Overridden. Gives the number of months in the specified year
 780         /// and era.
 781         /// </summary>
 782         /// <param name="year">An integer that specifies the year.
 783         /// </param>
 784         /// <param name="era">An integer that specifies the era.
 785         /// </param>
 786         /// <returns>An integer that gives the number of the months in the
 787         /// specified year.</returns>
 788         /// <exception cref="T:System.ArgumentOutOfRangeException">
 789         /// The exception is thrown, if the year or the era are not valid.
 790         /// </exception>
 791         public override int GetMonthsInYear(int year, int era) {
 792                 M_CheckYE(year, ref era);
 793                 return 12;
 794         }
 795
 796         /// <summary>
 797         /// Overridden. Gives the number of the year of the specified
 798         /// date.
 799         /// </summary>
 800         /// <param name="time">The
 801         /// <see cref="T:System.DateTime"/> that specifies a
 802         /// date.
 803         /// </param>
 804         /// <returns>An integer representing the year,
 805         /// starting with 1.</returns>
 806         /// <exception cref="T:System.ArgumentOutOfRangeException">
 807         /// The exception is thrown if the
 808         /// <see cref="T:System.DateTime"/> parameter is not in the
 809         /// supported range of the Hijri calendar.
 810         /// </exception>
 811         public override int GetYear(DateTime time) {
 812                 int rd = M_FromDateTime(time);
 813                 M_CheckFixedHijri("time", rd);
 814                 return CCHijriCalendar.year_from_fixed(rd);
 815         }
 816
 817         /// <summary>
 818         /// Overridden. Tells whether the given day
 819         /// is a leap day.
 820         /// </summary>
 821         /// <param name="year">An integer that specifies the year in the
 822         /// given era.
 823         /// </param>
 824         /// <param name="month">An integer that specifies the month.
 825         /// </param>
 826         /// <param name="day">An integer that specifies the day.
 827         /// </param>
 828         /// <param name="era">An integer that specifies the era.
 829         /// </param>
 830         /// <returns>A boolean that tells whether the given day is a leap
 831         /// day.
 832         /// </returns>
 833         /// <exception cref="T:System.ArgumentOutOfRangeException">
 834         /// The exception is thrown, if the year, month, day, or era is not
 835         /// valid.
 836         /// </exception>
 837         public override bool IsLeapDay(int year, int month, int day, int era)
 838         {
 839                 M_CheckYMDE(year, month, day, ref era);
 840                 return IsLeapYear(year) && month == 12 && day == 30;
 841         }
 842
 843         /// <summary>
 844         /// Overridden. Tells whether the given month
 845         /// is a leap month.
 846         /// </summary>
 847         /// <param name="year">An integer that specifies the year in the
 848         /// given era.
 849         /// </param>
 850         /// <param name="month">An integer that specifies the month.
 851         /// </param>
 852         /// <param name="era">An integer that specifies the era.
 853         /// </param>
 854         /// <returns>A boolean that tells whether the given month is a leap
 855         /// month.
 856         /// </returns>
 857         /// <exception cref="T:System.ArgumentOutOfRangeException">
 858         /// The exception is thrown, if the year, month, or era is not
 859         /// valid.
 860         /// </exception>
 861         public override bool IsLeapMonth(int year, int month, int era) {
 862                 M_CheckYME(year, month, ref era);
 863                 return false;
 864         }
 865
 866         /// <summary>
 867         /// Overridden. Tells whether the given year
 868         /// is a leap year.
 869         /// </summary>
 870         /// <param name="year">An integer that specifies the year in the
 871         /// given era.
 872         /// </param>
 873         /// <param name="era">An integer that specifies the era.
 874         /// </param>
 875         /// <returns>A boolean that tells whether the given year is a leap
 876         /// year.
 877         /// </returns>
 878         /// <exception cref="T:System.ArgumentOutOfRangeException">
 879         /// The exception is thrown, if the year or era is not
 880         /// valid.
 881         /// </exception>
 882         public override bool IsLeapYear(int year, int era) {
 883                 M_CheckYE(year, ref era);
 884                 return CCHijriCalendar.is_leap_year(year);
 885         }
 886
 887         /// <summary>
 888         /// Overridden. Creates the
 889         /// <see cref="T:System.DateTime"/> from the parameters.
 890         /// </summary>
 891         /// <param name="year">An integer that gives the year in the
 892         /// <paramref name="era"/>.
 893         /// </param>
 894         /// <param name="month">An integer that specifies the month.
 895         /// </param>
 896         /// <param name="day">An integer that specifies the day.
 897         /// </param>
 898         /// <param name="hour">An integer that specifies the hour.
 899         /// </param>
 900         /// <param name="minute">An integer that specifies the minute.
 901         /// </param>
 902         /// <param name="second">An integer that gives the second.
 903         /// </param>
 904         /// <param name="milliseconds">An integer that gives the
 905         /// milliseconds.
 906         /// </param>
 907         /// <param name="era">An integer that specifies the era.
 908         /// </param>
 909         /// <returns>A
 910         /// <see cref="T:system.DateTime"/> representig the date and time.
 911         /// </returns>
 912         /// <exception cref="T:System.ArgumentOutOfRangeException">
 913         /// The exception is thrown, if at least one of the parameters
 914         /// is out of range.
 915         /// </exception>
 916         public override DateTime ToDateTime(int year, int month, int day,
 917                 int hour, int minute, int second, int millisecond,
 918                 int era)
 919         {
 920                 M_CheckYMDE(year, month, day, ref era);
 921                 M_CheckHMSM(hour, minute, second, millisecond);
 922                 int rd = CCHijriCalendar.fixed_from_dmy(day, month, year);
 923                 return M_ToDateTime(rd,
 924                         hour, minute, second, millisecond);
 925         }
 926
 927         public override int ToFourDigitYear(int year)
 928         {
 929                 return base.ToFourDigitYear (year);
 930         }
 931
 932 #if !NET_2_1
 933         public override CalendarAlgorithmType AlgorithmType  {
 934                 get {
 935                         return CalendarAlgorithmType.LunarCalendar;
 936                 }
 937         }
 938 #endif
 939
 940         static DateTime Min = new DateTime (622, 7, 18, 0, 0, 0);
 941         static DateTime Max = new DateTime (9999, 12, 31, 11, 59, 59);
 942
 943         public override DateTime MinSupportedDateTime {
 944                 get {
 945                         return Min;
 946                 }
 947         }
 948
 949         public override DateTime MaxSupportedDateTime {
 950                 get {
 951                         return Max;
 952                 }
 953         }
 954
 955 } // class HijriCalendar
 956
 957 } // namespace System.Globalization