mcs/class/corlib/System.Globalization/DateTimeFormatInfo.cs

   1 // System.Globalization.DateTimeFormatInfo
   2 //
   3 // Some useful functions are missing in the ECMA specs.
   4 // They have been added following MS SDK Beta2
   5 //
   6 // Martin Weindel (martin.weindel@t-online.de)
   7 //
   8 // (C) Martin Weindel (martin.weindel@t-online.de)
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Collections;
  35 using System.Threading;
  36
  37 namespace System.Globalization
  38 {
  39         [Serializable]
  40         [MonoTODO ("Fix serialization compatibility with MS.NET")]
  41         public sealed class DateTimeFormatInfo : ICloneable, IFormatProvider {
  42                 private static readonly string MSG_READONLY = "This instance is read only";
  43                 private static readonly string MSG_ARRAYSIZE_MONTH = "An array with exactly 13 elements is needed";
  44                 private static readonly string MSG_ARRAYSIZE_DAY = "An array with exactly 7 elements is needed";
  45                 private static readonly string[] INVARIANT_ABBREVIATED_DAY_NAMES
  46                         = new string[7] { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
  47                 private static readonly string[] INVARIANT_DAY_NAMES
  48                         = new string[7] { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
  49                 private static readonly string[] INVARIANT_ABBREVIATED_MONTH_NAMES
  50                         = new string[13] { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", ""};
  51                 private static readonly string[] INVARIANT_MONTH_NAMES
  52                         = new string[13] { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December", ""};
  53                 private static readonly string[] INVARIANT_ERA_NAMES = {"A.D."};
  54
  55                 private static DateTimeFormatInfo theInvariantDateTimeFormatInfo;
  56
  57                 private bool readOnly;
  58                 private string _AMDesignator;
  59                 private string _PMDesignator;
  60                 private string _DateSeparator;
  61                 private string _TimeSeparator;
  62                 private string _ShortDatePattern;
  63                 private string _LongDatePattern;
  64                 private string _ShortTimePattern;
  65                 private string _LongTimePattern;
  66                 private string _MonthDayPattern;
  67                 private string _YearMonthPattern;
  68                 private string _FullDateTimePattern;
  69                 private string _RFC1123Pattern;
  70                 private string _SortableDateTimePattern;
  71                 private string _UniversalSortableDateTimePattern;
  72                 private DayOfWeek _FirstDayOfWeek;
  73                 private Calendar _Calendar;
  74                 private CalendarWeekRule _CalendarWeekRule;
  75                 private string[] _AbbreviatedDayNames;
  76                 private string[] _DayNames;
  77                 private string[] _MonthNames;
  78                 private string[] _AbbreviatedMonthNames;
  79
  80                 // FIXME: not supported other than invariant
  81                 private string [] _ShortDatePatterns;
  82                 private string [] _LongDatePatterns;
  83                 private string [] _ShortTimePatterns;
  84                 private string [] _LongTimePatterns;
  85                 private string [] _MonthDayPatterns;
  86                 private string [] _YearMonthPatterns;
  87
  88                 public DateTimeFormatInfo()
  89                 {
  90                         readOnly = false;
  91                         _AMDesignator = "AM";
  92                         _PMDesignator = "PM";
  93                         _DateSeparator = "/";
  94                         _TimeSeparator = ":";
  95                         _ShortDatePattern = "MM/dd/yyyy";
  96                         _LongDatePattern = "dddd, dd MMMM yyyy";
  97                         _ShortTimePattern = "HH:mm";
  98                         _LongTimePattern = "HH:mm:ss";
  99                         _MonthDayPattern = "MMMM dd";
 100                         _YearMonthPattern = "yyyy MMMM";
 101                         _FullDateTimePattern = "dddd, dd MMMM yyyy HH:mm:ss";
 102
 103                         // FIXME: for the following three pattern: "The
 104                         // default value of this property is derived
 105                         // from the calendar that is set for
 106                         // CultureInfo.CurrentCulture or the default
 107                         // calendar of CultureInfo.CurrentCulture."
 108
 109                         // Actually, no predefined culture has different values
 110                         // than those default values.
 111
 112                         _RFC1123Pattern = "ddd, dd MMM yyyy HH':'mm':'ss 'GMT'";
 113                         _SortableDateTimePattern = "yyyy'-'MM'-'dd'T'HH':'mm':'ss";
 114                         _UniversalSortableDateTimePattern = "yyyy'-'MM'-'dd HH':'mm':'ss'Z'";
 115
 116                         _FirstDayOfWeek = DayOfWeek.Sunday;
 117                         _Calendar = new GregorianCalendar();
 118                         _CalendarWeekRule = CalendarWeekRule.FirstDay;
 119
 120                         _AbbreviatedDayNames = INVARIANT_ABBREVIATED_DAY_NAMES;
 121                         _DayNames = INVARIANT_DAY_NAMES;
 122                         _AbbreviatedMonthNames = INVARIANT_ABBREVIATED_MONTH_NAMES;
 123                         _MonthNames = INVARIANT_MONTH_NAMES;
 124                 }
 125
 126                 // LAMESPEC: this is not in ECMA specs
 127                 public static DateTimeFormatInfo GetInstance(IFormatProvider provider)
 128                 {
 129                         if (provider != null) {
 130                                 DateTimeFormatInfo dtfi;
 131                                 dtfi = (DateTimeFormatInfo)provider.GetFormat(typeof(DateTimeFormatInfo));
 132                                 if (dtfi != null)
 133                                         return dtfi;
 134                         }
 135
 136                         return CurrentInfo;
 137                 }
 138
 139                 public bool IsReadOnly {
 140                         get {
 141                                 return readOnly;
 142                         }
 143                 }
 144
 145                 public static DateTimeFormatInfo ReadOnly(DateTimeFormatInfo dtfi)
 146                 {
 147                         DateTimeFormatInfo copy = (DateTimeFormatInfo)dtfi.Clone();
 148                         copy.readOnly = true;
 149                         return copy;
 150                 }
 151
 152                 public object Clone ()
 153                 {
 154                         DateTimeFormatInfo clone = (DateTimeFormatInfo) MemberwiseClone();
 155                         // clone is not read only
 156                         clone.readOnly = false;
 157                         return clone;
 158                 }
 159
 160                 public object GetFormat(Type formatType)
 161                 {
 162                         return (formatType == GetType()) ? this : null;
 163                 }
 164
 165                 [MonoTODO]
 166                 public string GetAbbreviatedEraName(int era)
 167                 {
 168                         if (era < _Calendar.Eras.Length || era >= _Calendar.Eras.Length)
 169                                 throw new ArgumentOutOfRangeException();
 170                         notImplemented();
 171                         //FIXME: implement me
 172                         return null;
 173                 }
 174
 175                 public string GetAbbreviatedMonthName(int month)
 176                 {
 177                         if (month < 1 || month > 13) throw new ArgumentOutOfRangeException();
 178                         return _AbbreviatedMonthNames[month-1];
 179                 }
 180
 181                 [MonoTODO]
 182                 public int GetEra(string eraName)
 183                 {
 184                         if (eraName == null) throw new ArgumentNullException();
 185                         eraName = eraName.ToUpper();
 186                         notImplemented();
 187                         //FIXME: implement me
 188                         return -1;
 189                 }
 190
 191                 [MonoTODO]
 192                 public string GetEraName(int era)
 193                 {
 194 //                      if (era < _Calendar.Eras.Length || era >= _Calendar.Eras.Length)
 195 //                              throw new ArgumentOutOfRangeException();
 196                         try {
 197                                 return INVARIANT_ERA_NAMES[era - 1];
 198                         }
 199                         catch {
 200                                 //FIXME: implement me
 201                                 notImplemented();
 202                                 return null;
 203                         }
 204                 }
 205
 206                 public string GetMonthName(int month)
 207                 {
 208                         if (month < 1 || month > 13) throw new ArgumentOutOfRangeException();
 209                         return _MonthNames[month-1];
 210                 }
 211
 212                 public string[] AbbreviatedDayNames
 213                 {
 214                         get
 215                         {
 216                                 return (string[]) _AbbreviatedDayNames.Clone();
 217                         }
 218                         set
 219                         {
 220                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 221                                 if (value == null) throw new ArgumentNullException();
 222                                 if (value.GetLength(0) != 7) throw new ArgumentException(MSG_ARRAYSIZE_DAY);
 223                                 _AbbreviatedDayNames = (string[]) value.Clone();
 224                         }
 225                 }
 226
 227                 public string[] AbbreviatedMonthNames
 228                 {
 229                         get
 230                         {
 231                                 return (string[]) _AbbreviatedMonthNames.Clone();
 232                         }
 233                         set
 234                         {
 235                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 236                                 if (value == null) throw new ArgumentNullException();
 237                                 if (value.GetLength(0) != 13) throw new ArgumentException(MSG_ARRAYSIZE_MONTH);
 238                                 _AbbreviatedMonthNames = (string[]) value.Clone();
 239                         }
 240                 }
 241
 242                 public string[] DayNames
 243                 {
 244                         get
 245                         {
 246                                 return (string[]) _DayNames.Clone();
 247                         }
 248                         set
 249                         {
 250                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 251                                 if (value == null) throw new ArgumentNullException();
 252                                 if (value.GetLength(0) != 7) throw new ArgumentException(MSG_ARRAYSIZE_DAY);
 253                                 _DayNames = (string[]) value.Clone();
 254                         }
 255                 }
 256
 257                 public string[] MonthNames
 258                 {
 259                         get
 260                         {
 261                                 return (string[]) _MonthNames.Clone();
 262                         }
 263                         set
 264                         {
 265                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 266                                 if (value == null) throw new ArgumentNullException();
 267                                 if (value.GetLength(0) != 13) throw new ArgumentException(MSG_ARRAYSIZE_MONTH);
 268                                 _MonthNames = (string[]) value.Clone();
 269                         }
 270                 }
 271
 272                 public string AMDesignator
 273                 {
 274                         get
 275                         {
 276                                 return _AMDesignator;
 277                         }
 278                         set
 279                         {
 280                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 281                                 if (value == null) throw new ArgumentNullException();
 282                                 _AMDesignator = value;
 283                         }
 284                 }
 285
 286                 public string PMDesignator
 287                 {
 288                         get
 289                         {
 290                                 return _PMDesignator;
 291                         }
 292                         set
 293                         {
 294                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 295                                 if (value == null) throw new ArgumentNullException();
 296                                 _PMDesignator = value;
 297                         }
 298                 }
 299
 300                 public string DateSeparator
 301                 {
 302                         get
 303                         {
 304                                 return _DateSeparator;
 305                         }
 306                         set
 307                         {
 308                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 309                                 if (value == null) throw new ArgumentNullException();
 310                                 _DateSeparator = value;
 311                         }
 312                 }
 313
 314                 public string TimeSeparator
 315                 {
 316                         get
 317                         {
 318                                 return _TimeSeparator;
 319                         }
 320                         set
 321                         {
 322                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 323                                 if (value == null) throw new ArgumentNullException();
 324                                 _TimeSeparator = value;
 325                         }
 326                 }
 327
 328                 public string LongDatePattern
 329                 {
 330                         get
 331                         {
 332                                 return _LongDatePattern;
 333                         }
 334                         set
 335                         {
 336                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 337                                 if (value == null) throw new ArgumentNullException();
 338                                 _LongDatePattern = value;
 339                         }
 340                 }
 341
 342                 public string ShortDatePattern
 343                 {
 344                         get
 345                         {
 346                                 return _ShortDatePattern;
 347                         }
 348                         set
 349                         {
 350                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 351                                 if (value == null) throw new ArgumentNullException();
 352                                 _ShortDatePattern = value;
 353                         }
 354                 }
 355
 356                 public string ShortTimePattern
 357                 {
 358                         get
 359                         {
 360                                 return _ShortTimePattern;
 361                         }
 362                         set
 363                         {
 364                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 365                                 if (value == null) throw new ArgumentNullException();
 366                                 _ShortTimePattern = value;
 367                         }
 368                 }
 369
 370                 public string LongTimePattern
 371                 {
 372                         get
 373                         {
 374                                 return _LongTimePattern;
 375                         }
 376                         set
 377                         {
 378                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 379                                 if (value == null) throw new ArgumentNullException();
 380                                 _LongTimePattern = value;
 381                         }
 382                 }
 383
 384                 public string MonthDayPattern
 385                 {
 386                         get
 387                         {
 388                                 return _MonthDayPattern;
 389                         }
 390                         set
 391                         {
 392                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 393                                 if (value == null) throw new ArgumentNullException();
 394                                 _MonthDayPattern = value;
 395                         }
 396                 }
 397
 398                 public string YearMonthPattern
 399                 {
 400                         get
 401                         {
 402                                 return _YearMonthPattern;
 403                         }
 404                         set
 405                         {
 406                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 407                                 if (value == null) throw new ArgumentNullException();
 408                                 _YearMonthPattern = value;
 409                         }
 410                 }
 411
 412                 public string FullDateTimePattern
 413                 {
 414                         get
 415                         {
 416                                 if(_FullDateTimePattern!=null) {
 417                                         return _FullDateTimePattern;
 418                                 } else {
 419                                         return(_LongDatePattern + " " + _LongTimePattern);
 420                                 }
 421                         }
 422                         set
 423                         {
 424                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 425                                 if (value == null) throw new ArgumentNullException();
 426                                 _FullDateTimePattern = value;
 427                         }
 428                 }
 429
 430                 public static DateTimeFormatInfo CurrentInfo
 431                 {
 432                         get
 433                         {
 434                                 return Thread.CurrentThread.CurrentCulture.DateTimeFormat;
 435                         }
 436                 }
 437
 438                 public static DateTimeFormatInfo InvariantInfo
 439                 {
 440                         get
 441                         {
 442                                 if (theInvariantDateTimeFormatInfo == null) {
 443                                         theInvariantDateTimeFormatInfo =
 444                                                 DateTimeFormatInfo.ReadOnly(new DateTimeFormatInfo());
 445                                         theInvariantDateTimeFormatInfo.FillInvariantPatterns ();
 446                                 }
 447                                 return theInvariantDateTimeFormatInfo;
 448                         }
 449                 }
 450
 451                 // LAMESPEC: this is not in ECMA specs
 452                 public DayOfWeek FirstDayOfWeek
 453                 {
 454                         get
 455                         {
 456                                 return _FirstDayOfWeek;
 457                         }
 458                         set
 459                         {
 460                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 461                                 if ((int) value < 0 || (int) value > 6) throw new ArgumentOutOfRangeException();
 462                                 _FirstDayOfWeek = value;
 463                         }
 464                 }
 465
 466                 // LAMESPEC: this is not in ECMA specs
 467                 public Calendar Calendar
 468                 {
 469                         get
 470                         {
 471                                 return _Calendar;
 472                         }
 473                         set
 474                         {
 475                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 476                                 if (value == null) throw new ArgumentNullException();
 477                                 _Calendar = value;
 478                         }
 479                 }
 480
 481                 public CalendarWeekRule CalendarWeekRule
 482                 {
 483                         get
 484                         {
 485                                 return _CalendarWeekRule;
 486                         }
 487                         set
 488                         {
 489                                 if (IsReadOnly) throw new InvalidOperationException(MSG_READONLY);
 490                                 _CalendarWeekRule = value;
 491                         }
 492                 }
 493
 494                 // LAMESPEC: this is not in ECMA specs
 495                 public string RFC1123Pattern
 496                 {
 497                         get
 498                         {
 499                                 return _RFC1123Pattern;
 500                         }
 501                 }
 502
 503                 // LAMESPEC: this is not in ECMA specs
 504                 public string SortableDateTimePattern
 505                 {
 506                         get
 507                         {
 508                                 return _SortableDateTimePattern;
 509                         }
 510                 }
 511
 512                 // LAMESPEC: this is not in ECMA specs
 513                 public string UniversalSortableDateTimePattern
 514                 {
 515                         get
 516                         {
 517                                 return _UniversalSortableDateTimePattern;
 518                         }
 519                 }
 520
 521                 // LAMESPEC: this is not in ECMA specs
 522                 [MonoTODO ("Not complete depending on GetAllDateTimePatterns(char)")]
 523                 public string[] GetAllDateTimePatterns()
 524                 {
 525                         ArrayList al = new ArrayList ();
 526                         foreach (string s in GetAllDateTimePatterns ('d'))
 527                                 al.Add (s);
 528                         foreach (string s in GetAllDateTimePatterns ('D'))
 529                                 al.Add (s);
 530                         foreach (string s in GetAllDateTimePatterns ('g'))
 531                                 al.Add (s);
 532                         foreach (string s in GetAllDateTimePatterns ('G'))
 533                                 al.Add (s);
 534                         foreach (string s in GetAllDateTimePatterns ('f'))
 535                                 al.Add (s);
 536                         foreach (string s in GetAllDateTimePatterns ('F'))
 537                                 al.Add (s);
 538                         // Yes, that is very meaningless, but that is what MS
 539                         // is doing (LAMESPEC: Since it is documented that
 540                         // 'M' and 'm' are equal, they should not cosider
 541                         // that there is a possibility that 'M' and 'm' are
 542                         // different.)
 543                         foreach (string s in GetAllDateTimePatterns ('m'))
 544                                 al.Add (s);
 545                         foreach (string s in GetAllDateTimePatterns ('M'))
 546                                 al.Add (s);
 547                         foreach (string s in GetAllDateTimePatterns ('r'))
 548                                 al.Add (s);
 549                         foreach (string s in GetAllDateTimePatterns ('R'))
 550                                 al.Add (s);
 551                         foreach (string s in GetAllDateTimePatterns ('s'))
 552                                 al.Add (s);
 553                         foreach (string s in GetAllDateTimePatterns ('t'))
 554                                 al.Add (s);
 555                         foreach (string s in GetAllDateTimePatterns ('T'))
 556                                 al.Add (s);
 557                         foreach (string s in GetAllDateTimePatterns ('u'))
 558                                 al.Add (s);
 559                         foreach (string s in GetAllDateTimePatterns ('U'))
 560                                 al.Add (s);
 561                         foreach (string s in GetAllDateTimePatterns ('y'))
 562                                 al.Add (s);
 563                         foreach (string s in GetAllDateTimePatterns ('Y'))
 564                                 al.Add (s);
 565
 566                         return al.ToArray (typeof (string)) as string [];
 567                 }
 568
 569                 // LAMESPEC: this is not in ECMA specs
 570                 [MonoTODO ("We need more culture data in locale-builder")]
 571                 public string[] GetAllDateTimePatterns (char format)
 572                 {
 573                         string [] list;
 574                         switch (format) {
 575                         // Date
 576                         case 'D':
 577                                 if (_LongDatePatterns != null && _LongDatePatterns.Length > 0)
 578                                         return _LongDatePatterns.Clone () as string [];
 579                                 return new string [] {LongDatePattern};
 580                         case 'd':
 581                                 if (_ShortDatePatterns != null && _ShortDatePatterns.Length > 0)
 582                                         return _ShortDatePatterns.Clone () as string [];
 583                                 return new string [] {ShortDatePattern};
 584                         // Time
 585                         case 'T':
 586                                 if (_LongTimePatterns != null && _LongTimePatterns.Length > 0)
 587                                         return _LongTimePatterns.Clone () as string [];
 588                                 return new string [] {LongTimePattern};
 589                         case 't':
 590                                 if (_ShortTimePatterns != null && _ShortTimePatterns.Length > 0)
 591                                         return _ShortTimePatterns.Clone () as string [];
 592                                 return new string [] {ShortTimePattern};
 593                         // {Short|Long}Date + {Short|Long}Time
 594                         // FIXME: they should be the agglegation of the
 595                         // combination of the Date patterns and Time patterns.
 596                         case 'G':
 597                                 list = PopulateCombinedList (_ShortDatePatterns, _LongTimePatterns);
 598                                 if (list != null && list.Length > 0)
 599                                         return list;
 600                                 return new string [] {ShortDatePattern + ' ' + LongTimePattern};
 601                         case 'g':
 602                                 list = PopulateCombinedList (_ShortDatePatterns, _ShortTimePatterns);
 603                                 if (list != null && list.Length > 0)
 604                                         return list;
 605                                 return new string [] {ShortDatePattern + ' ' + ShortTimePattern};
 606                         // The 'U' pattern strings are always the same as 'F'.
 607                         // (only differs in assuming UTC or not.)
 608                         case 'U':
 609                         case 'F':
 610                                 list = PopulateCombinedList (_LongDatePatterns, _LongTimePatterns);
 611                                 if (list != null && list.Length > 0)
 612                                         return list;
 613                                 return new string [] {LongDatePattern + ' ' + LongTimePattern};
 614                         case 'f':
 615                                 list = PopulateCombinedList (_LongDatePatterns, _ShortTimePatterns);
 616                                 if (list != null && list.Length > 0)
 617                                         return list;
 618                                 return new string [] {LongDatePattern + ' ' + ShortTimePattern};
 619                         // MonthDay
 620                         case 'm':
 621                         case 'M':
 622                                 if (_MonthDayPatterns != null && _MonthDayPatterns.Length > 0)
 623                                         return _MonthDayPatterns.Clone () as string [];
 624                                 return new string [] {MonthDayPattern};
 625                         // YearMonth
 626                         case 'Y':
 627                         case 'y':
 628                                 if (_YearMonthPatterns != null && _YearMonthPatterns.Length > 0)
 629                                         return _YearMonthPatterns.Clone () as string [];
 630                                 return new string [] {YearMonthPattern};
 631                         // RFC1123
 632                         case 'r':
 633                         case 'R':
 634                                 return new string [] {RFC1123Pattern};
 635                         case 's':
 636                                 return new string [] {SortableDateTimePattern};
 637                         case 'u':
 638                                 return new string [] {UniversalSortableDateTimePattern};
 639                         }
 640                         throw new ArgumentException ("Format specifier was invalid.");
 641                 }
 642
 643                 // LAMESPEC: this is not in ECMA specs
 644                 public string GetDayName(DayOfWeek dayofweek)
 645                 {
 646                         int index = (int) dayofweek;
 647                         if (index < 0 || index > 6) throw new ArgumentOutOfRangeException();
 648                         return _DayNames[index];
 649                 }
 650
 651                 // LAMESPEC: this is not in ECMA specs
 652                 public string GetAbbreviatedDayName(DayOfWeek dayofweek)
 653                 {
 654                         int index = (int) dayofweek;
 655                         if (index < 0 || index > 6) throw new ArgumentOutOfRangeException();
 656                         return _AbbreviatedDayNames[index];
 657                 }
 658
 659                 private void FillInvariantPatterns ()
 660                 {
 661                         _ShortDatePatterns = new string [] {"MM/dd/yyyy"};
 662                         _LongDatePatterns = new string [] {"dddd, dd MMMM yyyy"};
 663                         _LongTimePatterns = new string [] {"HH:mm:ss"};
 664                         _ShortTimePatterns = new string [] {
 665                                 "HH:mm",
 666                                 "hh:mm tt",
 667                                 "H:mm",
 668                                 "h:mm tt"
 669                         };
 670                         _MonthDayPatterns = new string [] {"MMMM dd"};
 671                         _YearMonthPatterns = new string [] {"yyyy MMMM"};
 672                 }
 673
 674                 private string [] PopulateCombinedList (string [] dates, string [] times)
 675                 {
 676                         if (dates != null && times != null) {
 677                                 string [] list = new string [dates.Length * times.Length];
 678                                 int i = 0;
 679                                 foreach (string d in dates)
 680                                         foreach (string t in times)
 681                                                 list [i++] = d + ' ' + t;
 682                                 return list;
 683                         }
 684                         return null;
 685                 }
 686
 687                 private static void notImplemented()
 688                 {
 689                         throw new Exception("Not implemented");
 690                 }
 691         }
 692 }