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

   1 //
   2 // System.Globalization.CultureInfo.cs
   3 //
   4 // Authors:
   5 // Miguel de Icaza (miguel@ximian.com)
   6 // Dick Porter (dick@ximian.com)
   7 // Marek Safar (marek.safar@gmail.com)
   8 //
   9 // (C) 2001, 2002, 2003 Ximian, Inc. (http://www.ximian.com)
  10 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  11 // Copyright (C) 2012 Xamarin Inc (http://www.xamarin.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.Collections.Generic;
  34 using System.Threading;
  35 using System.Runtime.CompilerServices;
  36 using System.Runtime.InteropServices;
  37 using System.Diagnostics.Contracts;
  38
  39 namespace System.Globalization
  40 {
  41         [System.Runtime.InteropServices.ComVisible (true)]
  42         [Serializable]
  43         [StructLayout (LayoutKind.Sequential)]
  44         public class CultureInfo : ICloneable, IFormatProvider
  45         {
  46                 static volatile CultureInfo invariant_culture_info = new CultureInfo (InvariantCultureId, false, true);
  47                 static object shared_table_lock = new object ();
  48                 static CultureInfo default_current_culture;
  49
  50 #pragma warning disable 169, 649
  51                 bool m_isReadOnly;
  52                 int  cultureID;
  53                 [NonSerialized]
  54                 int parent_lcid;
  55                 [NonSerialized]
  56                 int datetime_index;
  57                 [NonSerialized]
  58                 int number_index;
  59                 [NonSerialized]
  60                 int default_calendar_type;
  61                 bool m_useUserOverride;
  62                 internal volatile NumberFormatInfo numInfo;
  63                 internal volatile DateTimeFormatInfo dateTimeInfo;
  64                 volatile TextInfo textInfo;
  65                 internal string m_name;
  66
  67                 [NonSerialized]
  68                 private string englishname;
  69                 [NonSerialized]
  70                 private string nativename;
  71                 [NonSerialized]
  72                 private string iso3lang;
  73                 [NonSerialized]
  74                 private string iso2lang;
  75                 [NonSerialized]
  76                 private string win3lang;
  77                 [NonSerialized]
  78                 private string territory;
  79                 [NonSerialized]
  80                 string[] native_calendar_names;
  81
  82                 volatile CompareInfo compareInfo;
  83                 [NonSerialized]
  84                 private unsafe readonly void *textinfo_data;
  85
  86                 [StructLayout (LayoutKind.Sequential)]
  87                 struct Data {
  88                         public int ansi;
  89                         public int ebcdic;
  90                         public int mac;
  91                         public int oem;
  92                         public bool right_to_left;
  93                         public byte list_sep;
  94                 }
  95
  96                 int m_dataItem;         // MS.NET serializes this.
  97 #pragma warning restore 169, 649
  98
  99                 Calendar calendar;
 100
 101                 [NonSerialized]
 102                 CultureInfo parent_culture;
 103
 104                 // Deserialized instances will set this to false
 105                 [NonSerialized]
 106                 bool constructed;
 107
 108                 [NonSerialized]
 109                 // Used by Thread.set_CurrentCulture
 110                 internal byte[] cached_serialized_form;
 111
 112                 [NonSerialized]internal CultureData m_cultureData;
 113                 [NonSerialized]internal bool m_isInherited;
 114
 115                 internal const int InvariantCultureId = 0x7F;
 116                 const int CalendarTypeBits = 8;
 117
 118                 const string MSG_READONLY = "This instance is read only";
 119
 120                 public static CultureInfo InvariantCulture {
 121                         get {
 122                                 return invariant_culture_info;
 123                         }
 124                 }
 125
 126                 public static CultureInfo CurrentCulture {
 127                         get {
 128                                 return Thread.CurrentThread.CurrentCulture;
 129                         }
 130 #if NETSTANDARD
 131                         set {
 132                                 throw new NotImplementedException ();
 133                         }
 134 #endif
 135                 }
 136
 137                 public static CultureInfo CurrentUICulture {
 138                         get {
 139                                 return Thread.CurrentThread.CurrentUICulture;
 140                         }
 141 #if NETSTANDARD
 142                         set {
 143                                 throw new NotImplementedException ();
 144                         }
 145 #endif
 146                 }
 147
 148                 internal static CultureInfo ConstructCurrentCulture ()
 149                 {
 150                         if (default_current_culture != null)
 151                                 return default_current_culture;
 152
 153                         var locale_name = get_current_locale_name ();
 154                         CultureInfo ci = null;
 155
 156                         if (locale_name != null) {
 157                                 try {
 158                                         ci = CreateSpecificCulture (locale_name);
 159                                 } catch {
 160                                 }
 161                         }
 162
 163                         if (ci == null) {
 164                                 ci = InvariantCulture;
 165                         } else {
 166                                 ci.m_isReadOnly = true;
 167                                 ci.m_useUserOverride = true;
 168                         }
 169
 170                         default_current_culture = ci;
 171                         return ci;
 172                 }
 173
 174                 internal static CultureInfo ConstructCurrentUICulture ()
 175                 {
 176                         return ConstructCurrentCulture ();
 177                 }
 178
 179                 // it is used for RegionInfo.
 180                 internal string Territory {
 181                         get { return territory; }
 182                 }
 183
 184 #if !NET_2_1
 185                 // FIXME: It is implemented, but would be hell slow.
 186                 [ComVisible (false)]
 187                 public CultureTypes CultureTypes {
 188                         get {
 189                                 CultureTypes ret = (CultureTypes) 0;
 190                                 foreach (CultureTypes v in Enum.GetValues (typeof (CultureTypes)))
 191                                         if (Array.IndexOf (GetCultures (v), this) >= 0)
 192                                                 ret |= v;
 193                                 return ret;
 194                         }
 195                 }
 196
 197                 [ComVisible (false)]
 198                 public CultureInfo GetConsoleFallbackUICulture ()
 199                 {
 200                         // as documented in MSDN ...
 201                         switch (Name) {
 202                         case "ar": case "ar-BH": case "ar-EG": case "ar-IQ":
 203                         case "ar-JO": case "ar-KW": case "ar-LB": case "ar-LY":
 204                         case "ar-QA": case "ar-SA": case "ar-SY": case "ar-AE":
 205                         case "ar-YE":
 206                         case "dv": case "dv-MV":
 207                         case "fa": case "fa-IR":
 208                         case "gu": case "gu-IN":
 209                         case "he": case "he-IL":
 210                         case "hi": case "hi-IN":
 211                         case "kn": case "kn-IN":
 212                         case "kok": case "kok-IN":
 213                         case "mr": case "mr-IN":
 214                         case "pa": case "pa-IN":
 215                         case "sa": case "sa-IN":
 216                         case "syr": case "syr-SY":
 217                         case "ta": case "ta-IN":
 218                         case "te": case "te-IN":
 219                         case "th": case "th-TH":
 220                         case "ur": case "ur-PK":
 221                         case "vi": case "vi-VN":
 222                                 return GetCultureInfo ("en");
 223                         case "ar-DZ": case "ar-MA": case "ar-TN":
 224                                 return GetCultureInfo ("fr");
 225                         }
 226                         return (CultureTypes & CultureTypes.WindowsOnlyCultures) != 0 ? CultureInfo.InvariantCulture : this;
 227                 }
 228
 229                 [ComVisible (false)]
 230                 public string IetfLanguageTag {
 231                         // There could be more consistent way to implement
 232                         // it, but right now it works just fine with this...
 233                         get {
 234                                 switch (Name) {
 235                                 case "zh-CHS":
 236                                         return "zh-Hans";
 237                                 case "zh-CHT":
 238                                         return "zh-Hant";
 239                                 default:
 240                                         return Name;
 241                                 }
 242                         }
 243                 }
 244
 245                 // For specific cultures it basically returns LCID.
 246                 // For neutral cultures it is mapped to the default(?) specific
 247                 // culture, where the LCID of the specific culture seems to be
 248                 // n + 1024 by default. zh-CHS is the only exception which is
 249                 // mapped to 2052, not 1028 (zh-CHT is mapped to 1028 instead).
 250                 // There are very few exceptions, here I simply list them here.
 251                 // It is Windows-specific property anyways, so no worthy of
 252                 // trying to do some complex things with locale-builder.
 253                 [ComVisible (false)]
 254                 public virtual int KeyboardLayoutId {
 255                         get {
 256                                 switch (LCID) {
 257                                 case 4: // zh-CHS (neutral)
 258                                         return 2052;
 259                                 case 1034: // es-ES Spanish 2
 260                                         return 3082;
 261                                 case 31748: // zh-CHT (neutral)
 262                                         return 1028;
 263                                 case 31770: // sr (neutral)
 264                                         return 2074;
 265                                 default:
 266                                         return LCID < 1024 ? LCID + 1024 : LCID;
 267                                 }
 268                         }
 269                 }
 270 #endif
 271
 272                 public virtual int LCID {
 273                         get {
 274                                 return cultureID;
 275                         }
 276                 }
 277
 278                 public virtual string Name {
 279                         get {
 280                                 return(m_name);
 281                         }
 282                 }
 283
 284                 public virtual string NativeName {
 285                         get {
 286                                 if (!constructed) Construct ();
 287                                 return nativename;
 288                         }
 289                 }
 290
 291                 internal string NativeCalendarName {
 292                         get {
 293                                 if (!constructed) Construct ();
 294                                 return native_calendar_names[(default_calendar_type >> CalendarTypeBits) - 1];
 295                         }
 296                 }
 297
 298                 public virtual Calendar Calendar {
 299                         get {
 300                                 if (calendar == null) {
 301                                         if (!constructed) Construct ();
 302                                         calendar = CreateCalendar (default_calendar_type);
 303                                 }
 304
 305                                 return calendar;
 306                         }
 307                 }
 308
 309                 [MonoLimitation ("Optional calendars are not supported only default calendar is returned")]
 310                 public virtual Calendar[] OptionalCalendars {
 311                         get {
 312                                 return new[] { Calendar };
 313                         }
 314                 }
 315
 316                 public virtual CultureInfo Parent
 317                 {
 318                         get {
 319                                 if (parent_culture == null) {
 320                                         if (!constructed)
 321                                                 Construct ();
 322                                         if (parent_lcid == cultureID) {
 323                                                 //
 324                                                 // Parent lcid is same but culture info is not for legacy zh culture
 325                                                 //
 326                                                 if (parent_lcid == 0x7C04 && EnglishName [EnglishName.Length - 1] == 'y')
 327                                                         return parent_culture = new CultureInfo ("zh-Hant");
 328                                                 else if (parent_lcid == 0x0004 && EnglishName [EnglishName.Length -1] == 'y')
 329                                                         return parent_culture = new CultureInfo ("zh-Hans");
 330                                                 return null;
 331                                         }
 332
 333                                         if (parent_lcid == InvariantCultureId)
 334                                                 parent_culture = InvariantCulture;
 335                                         else if (cultureID == InvariantCultureId)
 336                                                 parent_culture = this;
 337                                         else if (cultureID == 0x0404) {
 338                                                 // zh-tw has parent id 0x7C04 which is in this case zh-cht and not zh-hant
 339                                                 parent_culture = new CultureInfo ("zh-CHT");
 340                                         } else
 341                                                 parent_culture = new CultureInfo (parent_lcid);
 342                                 }
 343                                 return parent_culture;
 344                         }
 345                 }
 346
 347                 public virtual TextInfo TextInfo
 348                 {
 349                         get {
 350                                 if (textInfo == null) {
 351                                         if (!constructed) Construct ();
 352                                         lock (this) {
 353                                                 if(textInfo == null) {
 354                                                         textInfo = CreateTextInfo (m_isReadOnly);
 355                                                 }
 356                                         }
 357                                 }
 358
 359                                 return(textInfo);
 360                         }
 361                 }
 362
 363                 public virtual string ThreeLetterISOLanguageName {
 364                         get {
 365                                 if (!constructed) Construct ();
 366                                 return iso3lang;
 367                         }
 368                 }
 369
 370                 public virtual string ThreeLetterWindowsLanguageName
 371                 {
 372                         get {
 373                                 if (!constructed) Construct ();
 374                                 return(win3lang);
 375                         }
 376                 }
 377
 378                 public virtual string TwoLetterISOLanguageName {
 379                         get {
 380                                 if (!constructed) Construct ();
 381                                 return(iso2lang);
 382                         }
 383                 }
 384
 385                 public bool UseUserOverride
 386                 {
 387                         get {
 388                                 return m_useUserOverride;
 389                         }
 390                 }
 391
 392                 public void ClearCachedData()
 393                 {
 394                         lock (shared_table_lock) {
 395                                 shared_by_number = null;
 396                                 shared_by_name = null;
 397                         }
 398
 399                         //
 400                         // ClearCachedData method does not refresh the information in
 401                         // the Thread.CurrentCulture property for existing threads
 402                         //
 403                         default_current_culture = null;
 404
 405                         RegionInfo.ClearCachedData ();
 406                         TimeZone.ClearCachedData ();
 407                         TimeZoneInfo.ClearCachedData ();
 408                 }
 409
 410                 public virtual object Clone()
 411                 {
 412                         if (!constructed) Construct ();
 413                         CultureInfo ci=(CultureInfo)MemberwiseClone ();
 414                         ci.m_isReadOnly=false;
 415                         ci.cached_serialized_form=null;
 416                         if (!IsNeutralCulture) {
 417                                 ci.NumberFormat = (NumberFormatInfo)NumberFormat.Clone ();
 418                                 ci.DateTimeFormat = (DateTimeFormatInfo)DateTimeFormat.Clone ();
 419                         }
 420                         return(ci);
 421                 }
 422
 423                 public override bool Equals (object value)
 424                 {
 425                         CultureInfo b = value as CultureInfo;
 426                         return b != null && b.cultureID == cultureID && b.m_name == m_name;
 427                 }
 428
 429                 public static CultureInfo[] GetCultures(CultureTypes types)
 430                 {
 431                         bool neutral=((types & CultureTypes.NeutralCultures)!=0);
 432                         bool specific=((types & CultureTypes.SpecificCultures)!=0);
 433                         bool installed=((types & CultureTypes.InstalledWin32Cultures)!=0);  // TODO
 434
 435                         CultureInfo [] infos = internal_get_cultures (neutral, specific, installed);
 436                         // The runtime returns a NULL in the first position of the array when
 437                         // 'neutral' is true. We fill it in with a clone of InvariantCulture
 438                         // since it must not be read-only
 439                         int i = 0;
 440                         if (neutral && infos.Length > 0 && infos [0] == null) {
 441                                 infos [i++] = (CultureInfo) InvariantCulture.Clone ();
 442                         }
 443
 444                         for (; i < infos.Length; ++i) {
 445                                 var ci = infos [i];
 446                                 var ti = ci.GetTextInfoData ();
 447                                 infos [i].m_cultureData = CultureData.GetCultureData (ci.m_name, false, ci.datetime_index, ci.CalendarType, ci.number_index, ci.iso2lang,
 448                                         ti.ansi, ti.oem, ti.mac, ti.ebcdic, ti.right_to_left, ((char)ti.list_sep).ToString ());
 449                         }
 450
 451                         return infos;
 452                 }
 453
 454                 unsafe Data GetTextInfoData ()
 455                 {
 456                         return *(Data*) textinfo_data;
 457                 }
 458
 459                 public override int GetHashCode ()
 460                 {
 461                         return cultureID.GetHashCode ();
 462                 }
 463
 464                 public static CultureInfo ReadOnly(CultureInfo ci)
 465                 {
 466                         if(ci==null) {
 467                                 throw new ArgumentNullException("ci");
 468                         }
 469
 470                         if(ci.m_isReadOnly) {
 471                                 return(ci);
 472                         } else {
 473                                 CultureInfo new_ci=(CultureInfo)ci.Clone ();
 474                                 new_ci.m_isReadOnly=true;
 475                                 if (new_ci.numInfo != null)
 476                                         new_ci.numInfo = NumberFormatInfo.ReadOnly (new_ci.numInfo);
 477                                 if (new_ci.dateTimeInfo != null)
 478                                         new_ci.dateTimeInfo = DateTimeFormatInfo.ReadOnly (new_ci.dateTimeInfo);
 479                                 if (new_ci.textInfo != null)
 480                                         new_ci.textInfo = TextInfo.ReadOnly (new_ci.textInfo);
 481                                 return(new_ci);
 482                         }
 483                 }
 484
 485                 public override string ToString()
 486                 {
 487                         return(m_name);
 488                 }
 489
 490                 public virtual CompareInfo CompareInfo
 491                 {
 492                         get {
 493                                 if(compareInfo==null) {
 494                                         if (!constructed)
 495                                                 Construct ();
 496
 497                                         lock (this) {
 498                                                 if(compareInfo==null) {
 499                                                         compareInfo=new CompareInfo (this);
 500                                                 }
 501                                         }
 502                                 }
 503
 504                                 return(compareInfo);
 505                         }
 506                 }
 507
 508                 public virtual bool IsNeutralCulture {
 509                         get {
 510                                 if (cultureID == InvariantCultureId)
 511                                         return false;
 512
 513                                 if (!constructed) Construct ();
 514                                 return territory == null;
 515                         }
 516                 }
 517
 518                 internal void CheckNeutral ()
 519                 {
 520                 }
 521
 522                 public virtual NumberFormatInfo NumberFormat {
 523                         get {
 524                                 if (numInfo == null) {
 525                                         NumberFormatInfo temp = new NumberFormatInfo(this.m_cultureData);
 526                                         temp.isReadOnly = m_isReadOnly;
 527                                         numInfo = temp;
 528                                 }
 529
 530                                 return numInfo;
 531                         }
 532
 533                         set {
 534                                 if (!constructed) Construct ();
 535                                 if (m_isReadOnly) throw new InvalidOperationException(MSG_READONLY);
 536
 537                                 if (value == null)
 538                                         throw new ArgumentNullException ("NumberFormat");
 539
 540                                 numInfo = value;
 541                         }
 542                 }
 543
 544                 public virtual DateTimeFormatInfo DateTimeFormat {
 545                         get {
 546                                 if (dateTimeInfo != null)
 547                                         return dateTimeInfo;
 548
 549                                 if (!constructed) Construct ();
 550                                 CheckNeutral ();
 551
 552                                 var temp = new DateTimeFormatInfo (m_cultureData, Calendar);
 553                                 temp.m_isReadOnly = m_isReadOnly;
 554                                 System.Threading.Thread.MemoryBarrier();
 555                                 dateTimeInfo = temp;
 556                                 return dateTimeInfo;
 557                         }
 558
 559                         set {
 560                                 if (!constructed) Construct ();
 561                                 if (m_isReadOnly) throw new InvalidOperationException(MSG_READONLY);
 562
 563                                 if (value == null)
 564                                         throw new ArgumentNullException ("DateTimeFormat");
 565
 566                                 dateTimeInfo = value;
 567                         }
 568                 }
 569
 570                 public virtual string DisplayName {
 571                         get {
 572                                 // Mono is not localized and will always return english name regardless of OS locale
 573                                 return EnglishName;
 574                         }
 575                 }
 576
 577                 public virtual string EnglishName {
 578                         get {
 579                                 if (!constructed) Construct ();
 580                                 return englishname;
 581                         }
 582                 }
 583
 584                 public static CultureInfo InstalledUICulture {
 585                         get {
 586                                 return ConstructCurrentCulture ();
 587                         }
 588                 }
 589
 590                 public bool IsReadOnly {
 591                         get {
 592                                 return m_isReadOnly;
 593                         }
 594                 }
 595
 596
 597                 //
 598                 // IFormatProvider implementation
 599                 //
 600                 public virtual object GetFormat( Type formatType )
 601                 {
 602                         object format = null;
 603
 604                         if ( formatType == typeof(NumberFormatInfo) )
 605                                 format = NumberFormat;
 606                         else if ( formatType == typeof(DateTimeFormatInfo) )
 607                                 format = DateTimeFormat;
 608
 609                         return format;
 610                 }
 611
 612                 void Construct ()
 613                 {
 614                         construct_internal_locale_from_lcid (cultureID);
 615                         constructed = true;
 616                 }
 617
 618                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 619                 private extern bool construct_internal_locale_from_lcid (int lcid);
 620
 621                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 622                 private extern bool construct_internal_locale_from_name (string name);
 623
 624                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 625                 private extern static string get_current_locale_name ();
 626
 627                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 628                 private extern static CultureInfo [] internal_get_cultures (bool neutral, bool specific, bool installed);
 629
 630                 private void ConstructInvariant (bool read_only)
 631                 {
 632                         cultureID = InvariantCultureId;
 633
 634                         /* NumberFormatInfo defaults to the invariant data */
 635                         numInfo=NumberFormatInfo.InvariantInfo;
 636
 637                         if (!read_only) {
 638                                 numInfo = (NumberFormatInfo) numInfo.Clone ();
 639                         }
 640
 641                         textInfo = TextInfo.Invariant;
 642
 643                         m_name=String.Empty;
 644                         englishname=
 645                         nativename="Invariant Language (Invariant Country)";
 646                         iso3lang="IVL";
 647                         iso2lang="iv";
 648                         win3lang="IVL";
 649                         default_calendar_type = 1 << CalendarTypeBits | (int) GregorianCalendarTypes.Localized;
 650                 }
 651
 652                 private unsafe TextInfo CreateTextInfo (bool readOnly)
 653                 {
 654                         TextInfo tempTextInfo = new TextInfo (this.m_cultureData);
 655                         tempTextInfo.SetReadOnlyState (readOnly);
 656                         return tempTextInfo;
 657                 }
 658
 659                 public CultureInfo (int culture) : this (culture, true) {}
 660
 661                 public CultureInfo (int culture, bool useUserOverride) :
 662                         this (culture, useUserOverride, false) {}
 663
 664                 private CultureInfo (int culture, bool useUserOverride, bool read_only)
 665                 {
 666                         if (culture < 0)
 667                                 throw new ArgumentOutOfRangeException ("culture", "Positive "
 668                                         + "number required.");
 669
 670                         constructed = true;
 671                         m_isReadOnly = read_only;
 672                         m_useUserOverride = useUserOverride;
 673
 674                         if (culture == InvariantCultureId) {
 675                                 /* Short circuit the invariant culture */
 676                                 m_cultureData = CultureData.Invariant;
 677                                 ConstructInvariant (read_only);
 678                                 return;
 679                         }
 680
 681                         if (!construct_internal_locale_from_lcid (culture)) {
 682                                 //
 683                                 // Be careful not to cause recursive CultureInfo initialization
 684                                 //
 685                                 var msg = string.Format (InvariantCulture, "Culture ID {0} (0x{1}) is not a supported culture.", culture.ToString (InvariantCulture), culture.ToString ("X4", InvariantCulture));
 686                                 throw new CultureNotFoundException ("culture", msg);
 687                         }
 688
 689                         var ti = GetTextInfoData ();
 690                         m_cultureData = CultureData.GetCultureData (m_name, m_useUserOverride, datetime_index, CalendarType, number_index, iso2lang,
 691                                 ti.ansi, ti.oem, ti.mac, ti.ebcdic, ti.right_to_left, ((char)ti.list_sep).ToString ());
 692                 }
 693
 694                 public CultureInfo (string name) : this (name, true) {}
 695
 696                 public CultureInfo (string name, bool useUserOverride) :
 697                         this (name, useUserOverride, false) {}
 698
 699                 private CultureInfo (string name, bool useUserOverride, bool read_only)
 700                 {
 701                         if (name == null)
 702                                 throw new ArgumentNullException ("name");
 703
 704                         constructed = true;
 705                         m_isReadOnly = read_only;
 706                         m_useUserOverride = useUserOverride;
 707                         m_isInherited = GetType() != typeof(System.Globalization.CultureInfo);
 708
 709                         if (name.Length == 0) {
 710                                 /* Short circuit the invariant culture */
 711                                 m_cultureData = CultureData.Invariant;
 712                                 ConstructInvariant (read_only);
 713                                 return;
 714                         }
 715
 716                         if (!construct_internal_locale_from_name (name.ToLowerInvariant ())) {
 717                                 throw CreateNotFoundException (name);
 718                         }
 719
 720                         var ti = GetTextInfoData ();
 721                         m_cultureData = CultureData.GetCultureData (m_name, useUserOverride, datetime_index, CalendarType, number_index, iso2lang,
 722                                 ti.ansi, ti.oem, ti.mac, ti.ebcdic, ti.right_to_left, ((char)ti.list_sep).ToString ());
 723                 }
 724
 725                 // This is used when creating by specific name and creating by
 726                 // current locale so we can initialize the object without
 727                 // doing any member initialization
 728                 private CultureInfo () { constructed = true; }
 729                 static Dictionary<int, CultureInfo> shared_by_number;
 730                 static Dictionary<string, CultureInfo> shared_by_name;
 731
 732                 static void insert_into_shared_tables (CultureInfo c)
 733                 {
 734                         if (shared_by_number == null){
 735                                 shared_by_number = new Dictionary<int, CultureInfo> ();
 736                                 shared_by_name = new Dictionary<string, CultureInfo> ();
 737                         }
 738                         shared_by_number [c.cultureID] = c;
 739                         shared_by_name [c.m_name] = c;
 740                 }
 741
 742                 public static CultureInfo GetCultureInfo (int culture)
 743                 {
 744                         if (culture < 1)
 745                                 throw new ArgumentOutOfRangeException ("culture", "Positive number required.");
 746
 747                         CultureInfo c;
 748
 749                         lock (shared_table_lock){
 750                                 if (shared_by_number != null) {
 751                                         if (shared_by_number.TryGetValue (culture, out c))
 752                                                 return c;
 753                                 }
 754
 755                                 c = new CultureInfo (culture, false, true);
 756                                 insert_into_shared_tables (c);
 757                                 return c;
 758                         }
 759                 }
 760
 761                 public static CultureInfo GetCultureInfo (string name)
 762                 {
 763                         if (name == null)
 764                                 throw new ArgumentNullException ("name");
 765
 766                         CultureInfo c;
 767                         lock (shared_table_lock){
 768                                 if (shared_by_name != null){
 769                                         if (shared_by_name.TryGetValue (name, out c))
 770                                                 return c;
 771                                 }
 772                                 c = new CultureInfo (name, false, true);
 773                                 insert_into_shared_tables (c);
 774                                 return c;
 775                         }
 776                 }
 777
 778                 [MonoTODO ("Currently it ignores the altName parameter")]
 779                 public static CultureInfo GetCultureInfo (string name, string altName) {
 780                         if (name == null)
 781                                 throw new ArgumentNullException ("null");
 782                         if (altName == null)
 783                                 throw new ArgumentNullException ("null");
 784
 785                         return GetCultureInfo (name);
 786                 }
 787
 788                 public static CultureInfo GetCultureInfoByIetfLanguageTag (string name)
 789                 {
 790                         // There could be more consistent way to implement
 791                         // it, but right now it works just fine with this...
 792                         switch (name) {
 793                         case "zh-Hans":
 794                                 return GetCultureInfo ("zh-CHS");
 795                         case "zh-Hant":
 796                                 return GetCultureInfo ("zh-CHT");
 797                         default:
 798                                 return GetCultureInfo (name);
 799                         }
 800                 }
 801
 802                 // used in runtime (icall.c) to construct CultureInfo for
 803                 // AssemblyName of assemblies
 804                 internal static CultureInfo CreateCulture (string name, bool reference)
 805                 {
 806                         bool read_only;
 807                         bool use_user_override;
 808
 809                         bool invariant = name.Length == 0;
 810                         if (reference) {
 811                                 use_user_override = invariant ? false : true;
 812                                 read_only = false;
 813                         } else {
 814                                 read_only = false;
 815                                 use_user_override = invariant ? false : true;
 816                         }
 817
 818                         return new CultureInfo (name, use_user_override, read_only);
 819                 }
 820
 821                 public static CultureInfo CreateSpecificCulture (string name)
 822                 {
 823                         if (name == null)
 824                                 throw new ArgumentNullException ("name");
 825
 826                         if (name.Length == 0)
 827                                 return InvariantCulture;
 828
 829                         var src_name = name;
 830                         name = name.ToLowerInvariant ();
 831                         CultureInfo ci = new CultureInfo ();
 832
 833                         if (!ci.construct_internal_locale_from_name (name)) {
 834                                 int idx = name.Length - 1;
 835                                 if (idx > 0) {
 836                                         while ((idx = name.LastIndexOf ('-', idx - 1)) > 0) {
 837                                                 if (ci.construct_internal_locale_from_name (name.Substring (0, idx)))
 838                                                         break;
 839                                         }
 840                                 }
 841
 842                                 if (idx <= 0)
 843                                         throw CreateNotFoundException (src_name);
 844                         }
 845
 846                         if (ci.IsNeutralCulture)
 847                                 ci = CreateSpecificCultureFromNeutral (ci.Name);
 848
 849                         var ti = ci.GetTextInfoData ();
 850
 851                         ci.m_cultureData = CultureData.GetCultureData (ci.m_name, false, ci.datetime_index, ci.CalendarType, ci.number_index, ci.iso2lang,
 852                                 ti.ansi, ti.oem, ti.mac, ti.ebcdic, ti.right_to_left, ((char)ti.list_sep).ToString ());
 853                         return ci;
 854                 }
 855
 856                 //
 857                 // Creates specific culture from neutral culture. Used by CreateSpecificCulture
 858                 // only but using separate method we can delay switch underlying Dictionary
 859                 // initialization
 860                 //
 861                 static CultureInfo CreateSpecificCultureFromNeutral (string name)
 862                 {
 863                         int id;
 864
 865                         //
 866                         // For neutral cultures find predefined default specific culture
 867                         //
 868                         // Use managed switch because we need this for only some cultures
 869                         // and the method is not used frequently
 870                         //
 871                         // TODO: We could optimize for cultures with single specific culture
 872                         //
 873                         switch (name.ToLowerInvariant ()) {
 874                         case "af": id = 1078; break;
 875                         case "am": id = 1118; break;
 876                         case "ar": id = 1025; break;
 877                         case "arn": id = 1146; break;
 878                         case "as": id = 1101; break;
 879                         case "az": id = 1068; break;
 880                         case "az-cyrl": id = 2092; break;
 881                         case "az-latn": id = 1068; break;
 882                         case "ba": id = 1133; break;
 883                         case "be": id = 1059; break;
 884                         case "bg": id = 1026; break;
 885                         case "bn": id = 1093; break;
 886                         case "bo": id = 1105; break;
 887                         case "br": id = 1150; break;
 888                         case "bs": id = 5146; break;
 889                         case "bs-cyrl": id = 8218; break;
 890                         case "bs-latn": id = 5146; break;
 891                         case "ca": id = 1027; break;
 892                         case "co": id = 1155; break;
 893                         case "cs": id = 1029; break;
 894                         case "cy": id = 1106; break;
 895                         case "da": id = 1030; break;
 896                         case "de": id = 1031; break;
 897                         case "dsb": id = 2094; break;
 898                         case "dv": id = 1125; break;
 899                         case "el": id = 1032; break;
 900                         case "en": id = 1033; break;
 901                         case "es": id = 3082; break;
 902                         case "et": id = 1061; break;
 903                         case "eu": id = 1069; break;
 904                         case "fa": id = 1065; break;
 905                         case "fi": id = 1035; break;
 906                         case "fil": id = 1124; break;
 907                         case "fo": id = 1080; break;
 908                         case "fr": id = 1036; break;
 909                         case "fy": id = 1122; break;
 910                         case "ga": id = 2108; break;
 911                         case "gd": id = 1169; break;
 912                         case "gl": id = 1110; break;
 913                         case "gsw": id = 1156; break;
 914                         case "gu": id = 1095; break;
 915                         case "ha": id = 1128; break;
 916                         case "ha-latn": id = 1128; break;
 917                         case "he": id = 1037; break;
 918                         case "hi": id = 1081; break;
 919                         case "hr": id = 1050; break;
 920                         case "hsb": id = 1070; break;
 921                         case "hu": id = 1038; break;
 922                         case "hy": id = 1067; break;
 923                         case "id": id = 1057; break;
 924                         case "ig": id = 1136; break;
 925                         case "ii": id = 1144; break;
 926                         case "is": id = 1039; break;
 927                         case "it": id = 1040; break;
 928                         case "iu": id = 2141; break;
 929                         case "iu-cans": id = 1117; break;
 930                         case "iu-latn": id = 2141; break;
 931                         case "ja": id = 1041; break;
 932                         case "ka": id = 1079; break;
 933                         case "kk": id = 1087; break;
 934                         case "kl": id = 1135; break;
 935                         case "km": id = 1107; break;
 936                         case "kn": id = 1099; break;
 937                         case "ko": id = 1042; break;
 938                         case "kok": id = 1111; break;
 939                         case "ky": id = 1088; break;
 940                         case "lb": id = 1134; break;
 941                         case "lo": id = 1108; break;
 942                         case "lt": id = 1063; break;
 943                         case "lv": id = 1062; break;
 944                         case "mi": id = 1153; break;
 945                         case "mk": id = 1071; break;
 946                         case "ml": id = 1100; break;
 947                         case "mn": id = 1104; break;
 948                         case "mn-cyrl": id = 1104; break;
 949                         case "mn-mong": id = 2128; break;
 950                         case "moh": id = 1148; break;
 951                         case "mr": id = 1102; break;
 952                         case "ms": id = 1086; break;
 953                         case "mt": id = 1082; break;
 954                         case "nb": id = 1044; break;
 955                         case "ne": id = 1121; break;
 956                         case "nl": id = 1043; break;
 957                         case "nn": id = 2068; break;
 958                         case "no": id = 1044; break;
 959                         case "nso": id = 1132; break;
 960                         case "oc": id = 1154; break;
 961                         case "or": id = 1096; break;
 962                         case "pa": id = 1094; break;
 963                         case "pl": id = 1045; break;
 964                         case "prs": id = 1164; break;
 965                         case "ps": id = 1123; break;
 966                         case "pt": id = 1046; break;
 967                         case "qut": id = 1158; break;
 968                         case "quz": id = 1131; break;
 969                         case "rm": id = 1047; break;
 970                         case "ro": id = 1048; break;
 971                         case "ru": id = 1049; break;
 972                         case "rw": id = 1159; break;
 973                         case "sa": id = 1103; break;
 974                         case "sah": id = 1157; break;
 975                         case "se": id = 1083; break;
 976                         case "si": id = 1115; break;
 977                         case "sk": id = 1051; break;
 978                         case "sl": id = 1060; break;
 979                         case "sma": id = 7227; break;
 980                         case "smj": id = 5179; break;
 981                         case "smn": id = 9275; break;
 982                         case "sms": id = 8251; break;
 983                         case "sq": id = 1052; break;
 984                         case "sr": id = 9242; break;
 985                         case "sr-cyrl": id = 10266; break;
 986                         case "sr-latn": id = 9242; break;
 987                         case "sv": id = 1053; break;
 988                         case "sw": id = 1089; break;
 989                         case "syr": id = 1114; break;
 990                         case "ta": id = 1097; break;
 991                         case "te": id = 1098; break;
 992                         case "tg": id = 1064; break;
 993                         case "tg-cyrl": id = 1064; break;
 994                         case "th": id = 1054; break;
 995                         case "tk": id = 1090; break;
 996                         case "tn": id = 1074; break;
 997                         case "tr": id = 1055; break;
 998                         case "tt": id = 1092; break;
 999                         case "tzm": id = 2143; break;
1000                         case "tzm-latn": id = 2143; break;
1001                         case "ug": id = 1152; break;
1002                         case "uk": id = 1058; break;
1003                         case "ur": id = 1056; break;
1004                         case "uz": id = 1091; break;
1005                         case "uz-cyrl": id = 2115; break;
1006                         case "uz-latn": id = 1091; break;
1007                         case "vi": id = 1066; break;
1008                         case "wo": id = 1160; break;
1009                         case "xh": id = 1076; break;
1010                         case "yo": id = 1130; break;
1011                         case "zh": id = 2052; break;
1012                         case "zh-chs":
1013                         case "zh-hans":
1014                                 id = 2052; break;
1015                         case "zh-cht":
1016                         case "zh-hant":
1017                                 id = 3076; break;
1018                         case "zu": id = 1077; break;
1019                         default:
1020                                 throw new NotImplementedException ("Mapping for neutral culture " + name);
1021                         }
1022
1023                         return new CultureInfo (id);
1024                 }
1025
1026                 internal int CalendarType {
1027                         get {
1028                                 switch (default_calendar_type >> CalendarTypeBits) {
1029                                 case 1:
1030                                         return Calendar.CAL_GREGORIAN;
1031                                 case 2:
1032                                         return Calendar.CAL_THAI;
1033                                 case 3:
1034                                         return Calendar.CAL_UMALQURA;
1035                                 case 4:
1036                                         return Calendar.CAL_HIJRI;
1037                                 default:
1038                                         throw new NotImplementedException ("CalendarType");
1039                                 }
1040                         }
1041                 }
1042
1043                 static Calendar CreateCalendar (int calendarType)
1044                 {
1045                         string name = null;
1046                         switch (calendarType >> CalendarTypeBits) {
1047                         case 1:
1048                                 GregorianCalendarTypes greg_type;
1049                                 greg_type = (GregorianCalendarTypes) (calendarType & 0xFF);
1050                                 return new GregorianCalendar (greg_type);
1051                         case 2:
1052                                 name = "System.Globalization.ThaiBuddhistCalendar";
1053                                 break;
1054                         case 3:
1055                                 name = "System.Globalization.UmAlQuraCalendar";
1056                                 break;
1057                         case 4:
1058                                 name = "System.Globalization.HijriCalendar";
1059                                 break;
1060                         default:
1061                                 throw new NotImplementedException ("Unknown calendar type: " + calendarType);
1062                         }
1063
1064                         Type type = Type.GetType (name, false);
1065                         if (type == null)
1066                                 return new GregorianCalendar (GregorianCalendarTypes.Localized); // return invariant calendar if not found
1067                         return (Calendar) Activator.CreateInstance (type);
1068                 }
1069
1070                 static Exception CreateNotFoundException (string name)
1071                 {
1072                         return new CultureNotFoundException ("name", "Culture name " + name + " is not supported.");
1073                 }
1074
1075                 public static CultureInfo DefaultThreadCurrentCulture {
1076                         get {
1077                                 return Thread.default_culture;
1078                         }
1079                         set {
1080                                 Thread.default_culture = value;
1081                         }
1082                 }
1083
1084                 public static CultureInfo DefaultThreadCurrentUICulture {
1085                         get {
1086                                 return Thread.default_ui_culture;
1087                         }
1088                         set {
1089                                 Thread.default_ui_culture = value;
1090                         }
1091                 }
1092
1093                 internal string SortName {
1094                         get {
1095                                 return m_name;
1096                         }
1097                 }
1098
1099 #region reference sources
1100                 // TODO:
1101                 internal static readonly bool IsTaiwanSku;
1102
1103         //
1104         // CheckDomainSafetyObject throw if the object is customized object which cannot be attached to
1105         // other object (like CultureInfo or DateTimeFormatInfo).
1106         //
1107
1108         internal static void CheckDomainSafetyObject(Object obj, Object container)
1109         {
1110             if (obj.GetType().Assembly != typeof(System.Globalization.CultureInfo).Assembly) {
1111
1112                 throw new InvalidOperationException(
1113                             String.Format(
1114                                 CultureInfo.CurrentCulture,
1115                                 Environment.GetResourceString("InvalidOperation_SubclassedObject"),
1116                                 obj.GetType(),
1117                                 container.GetType()));
1118             }
1119             Contract.EndContractBlock();
1120         }
1121
1122         // For resource lookup, we consider a culture the invariant culture by name equality.
1123         // We perform this check frequently during resource lookup, so adding a property for
1124         // improved readability.
1125         internal bool HasInvariantCultureName
1126         {
1127             get { return Name == CultureInfo.InvariantCulture.Name; }
1128         }
1129
1130         internal static bool VerifyCultureName(String cultureName, bool throwException)
1131         {
1132             // This function is used by ResourceManager.GetResourceFileName().
1133             // ResourceManager searches for resource using CultureInfo.Name,
1134             // so we should check against CultureInfo.Name.
1135
1136             for (int i=0; i<cultureName.Length; i++) {
1137                 char c = cultureName[i];
1138                 //
1139
1140                 if (Char.IsLetterOrDigit(c) || c=='-' || c=='_') {
1141                     continue;
1142                 }
1143                 if (throwException) {
1144                     throw new ArgumentException(Environment.GetResourceString("Argument_InvalidResourceCultureName", cultureName));
1145                 }
1146                 return false;
1147             }
1148             return true;
1149         }
1150
1151 #endregion
1152         }
1153 }