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
  38 namespace System.Globalization
  39 {
  40         [System.Runtime.InteropServices.ComVisible (true)]
  41         [Serializable]
  42         [StructLayout (LayoutKind.Sequential)]
  43         public class CultureInfo : ICloneable, IFormatProvider
  44         {
  45                 static volatile CultureInfo invariant_culture_info = new CultureInfo (InvariantCultureId, false, true);
  46                 static object shared_table_lock = new object ();
  47                 internal static int BootstrapCultureID;
  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                 [NonSerialized]
  63                 volatile NumberFormatInfo numInfo;
  64                 volatile DateTimeFormatInfo dateTimeInfo;
  65                 volatile TextInfo textInfo;
  66                 private string m_name;
  67
  68                 [NonSerialized]
  69                 private string englishname;
  70                 [NonSerialized]
  71                 private string nativename;
  72                 [NonSerialized]
  73                 private string iso3lang;
  74                 [NonSerialized]
  75                 private string iso2lang;
  76                 [NonSerialized]
  77                 private string win3lang;
  78                 [NonSerialized]
  79                 private string territory;
  80                 [NonSerialized]
  81                 string[] native_calendar_names;
  82
  83                 volatile CompareInfo compareInfo;
  84                 [NonSerialized]
  85                 private unsafe readonly void *textinfo_data;
  86
  87                 int m_dataItem;         // MS.NET serializes this.
  88 #pragma warning restore 169, 649
  89
  90                 Calendar calendar;
  91
  92                 [NonSerialized]
  93                 CultureInfo parent_culture;
  94
  95                 // Deserialized instances will set this to false
  96                 [NonSerialized]
  97                 bool constructed;
  98
  99                 [NonSerialized]
 100                 // Used by Thread.set_CurrentCulture
 101                 internal byte[] cached_serialized_form;
 102
 103                 const int InvariantCultureId = 0x7F;
 104                 const int CalendarTypeBits = 8;
 105
 106                 const string MSG_READONLY = "This instance is read only";
 107
 108                 public static CultureInfo InvariantCulture {
 109                         get {
 110                                 return invariant_culture_info;
 111                         }
 112                 }
 113
 114                 public static CultureInfo CurrentCulture {
 115                         get {
 116                                 return Thread.CurrentThread.CurrentCulture;
 117                         }
 118                 }
 119
 120                 public static CultureInfo CurrentUICulture {
 121                         get {
 122                                 return Thread.CurrentThread.CurrentUICulture;
 123                         }
 124                 }
 125
 126                 internal static CultureInfo ConstructCurrentCulture ()
 127                 {
 128                         if (default_current_culture != null)
 129                                 return default_current_culture;
 130                         CultureInfo ci = new CultureInfo ();
 131                         if (!ConstructInternalLocaleFromCurrentLocale (ci))
 132                                 ci = InvariantCulture;
 133                         BootstrapCultureID = ci.cultureID;
 134                         default_current_culture = ci;
 135                         return ci;
 136                 }
 137
 138                 internal static CultureInfo ConstructCurrentUICulture ()
 139                 {
 140                         return ConstructCurrentCulture ();
 141                 }
 142
 143                 // it is used for RegionInfo.
 144                 internal string Territory {
 145                         get { return territory; }
 146                 }
 147
 148 #if !NET_2_1
 149                 // FIXME: It is implemented, but would be hell slow.
 150                 [ComVisible (false)]
 151                 public CultureTypes CultureTypes {
 152                         get {
 153                                 CultureTypes ret = (CultureTypes) 0;
 154                                 foreach (CultureTypes v in Enum.GetValues (typeof (CultureTypes)))
 155                                         if (Array.IndexOf (GetCultures (v), this) >= 0)
 156                                                 ret |= v;
 157                                 return ret;
 158                         }
 159                 }
 160
 161                 [ComVisible (false)]
 162                 public CultureInfo GetConsoleFallbackUICulture ()
 163                 {
 164                         // as documented in MSDN ...
 165                         switch (Name) {
 166                         case "ar": case "ar-BH": case "ar-EG": case "ar-IQ":
 167                         case "ar-JO": case "ar-KW": case "ar-LB": case "ar-LY":
 168                         case "ar-QA": case "ar-SA": case "ar-SY": case "ar-AE":
 169                         case "ar-YE":
 170                         case "dv": case "dv-MV":
 171                         case "fa": case "fa-IR":
 172                         case "gu": case "gu-IN":
 173                         case "he": case "he-IL":
 174                         case "hi": case "hi-IN":
 175                         case "kn": case "kn-IN":
 176                         case "kok": case "kok-IN":
 177                         case "mr": case "mr-IN":
 178                         case "pa": case "pa-IN":
 179                         case "sa": case "sa-IN":
 180                         case "syr": case "syr-SY":
 181                         case "ta": case "ta-IN":
 182                         case "te": case "te-IN":
 183                         case "th": case "th-TH":
 184                         case "ur": case "ur-PK":
 185                         case "vi": case "vi-VN":
 186                                 return GetCultureInfo ("en");
 187                         case "ar-DZ": case "ar-MA": case "ar-TN":
 188                                 return GetCultureInfo ("fr");
 189                         }
 190                         return (CultureTypes & CultureTypes.WindowsOnlyCultures) != 0 ? CultureInfo.InvariantCulture : this;
 191                 }
 192
 193                 [ComVisible (false)]
 194                 public string IetfLanguageTag {
 195                         // There could be more consistent way to implement
 196                         // it, but right now it works just fine with this...
 197                         get {
 198                                 switch (Name) {
 199                                 case "zh-CHS":
 200                                         return "zh-Hans";
 201                                 case "zh-CHT":
 202                                         return "zh-Hant";
 203                                 default:
 204                                         return Name;
 205                                 }
 206                         }
 207                 }
 208
 209                 // For specific cultures it basically returns LCID.
 210                 // For neutral cultures it is mapped to the default(?) specific
 211                 // culture, where the LCID of the specific culture seems to be
 212                 // n + 1024 by default. zh-CHS is the only exception which is
 213                 // mapped to 2052, not 1028 (zh-CHT is mapped to 1028 instead).
 214                 // There are very few exceptions, here I simply list them here.
 215                 // It is Windows-specific property anyways, so no worthy of
 216                 // trying to do some complex things with locale-builder.
 217                 [ComVisible (false)]
 218                 public virtual int KeyboardLayoutId {
 219                         get {
 220                                 switch (LCID) {
 221                                 case 4: // zh-CHS (neutral)
 222                                         return 2052;
 223                                 case 1034: // es-ES Spanish 2
 224                                         return 3082;
 225                                 case 31748: // zh-CHT (neutral)
 226                                         return 1028;
 227                                 case 31770: // sr (neutral)
 228                                         return 2074;
 229                                 default:
 230                                         return LCID < 1024 ? LCID + 1024 : LCID;
 231                                 }
 232                         }
 233                 }
 234 #endif
 235
 236                 public virtual int LCID {
 237                         get {
 238                                 return cultureID;
 239                         }
 240                 }
 241
 242                 public virtual string Name {
 243                         get {
 244                                 return(m_name);
 245                         }
 246                 }
 247
 248                 public virtual string NativeName {
 249                         get {
 250                                 if (!constructed) Construct ();
 251                                 return nativename;
 252                         }
 253                 }
 254
 255                 internal string NativeCalendarName {
 256                         get {
 257                                 if (!constructed) Construct ();
 258                                 return native_calendar_names[(default_calendar_type >> CalendarTypeBits) - 1];
 259                         }
 260                 }
 261
 262                 public virtual Calendar Calendar {
 263                         get {
 264                                 if (calendar == null) {
 265                                         if (!constructed) Construct ();
 266                                         calendar = CreateCalendar (default_calendar_type);
 267                                 }
 268
 269                                 return calendar;
 270                         }
 271                 }
 272
 273                 [MonoLimitation ("Optional calendars are not supported only default calendar is returned")]
 274                 public virtual Calendar[] OptionalCalendars {
 275                         get {
 276                                 return new[] { Calendar };
 277                         }
 278                 }
 279
 280                 public virtual CultureInfo Parent
 281                 {
 282                         get {
 283                                 if (parent_culture == null) {
 284                                         if (!constructed)
 285                                                 Construct ();
 286                                         if (parent_lcid == cultureID) {
 287                                                 //
 288                                                 // Parent lcid is same but culture info is not for legacy zh culture
 289                                                 //
 290                                                 if (parent_lcid == 0x7C04 && EnglishName.EndsWith (" Legacy", StringComparison.Ordinal))
 291                                                         return parent_culture = new CultureInfo ("zh-Hant");
 292
 293                                                 return null;
 294                                         }
 295
 296                                         if (parent_lcid == InvariantCultureId)
 297                                                 parent_culture = InvariantCulture;
 298                                         else if (cultureID == InvariantCultureId)
 299                                                 parent_culture = this;
 300                                         else
 301                                                 parent_culture = new CultureInfo (parent_lcid);
 302                                 }
 303                                 return parent_culture;
 304                         }
 305                 }
 306
 307                 public virtual TextInfo TextInfo
 308                 {
 309                         get {
 310                                 if (textInfo == null) {
 311                                         if (!constructed) Construct ();
 312                                         lock (this) {
 313                                                 if(textInfo == null) {
 314                                                         textInfo = CreateTextInfo (m_isReadOnly);
 315                                                 }
 316                                         }
 317                                 }
 318
 319                                 return(textInfo);
 320                         }
 321                 }
 322
 323                 public virtual string ThreeLetterISOLanguageName {
 324                         get {
 325                                 if (!constructed) Construct ();
 326                                 return iso3lang;
 327                         }
 328                 }
 329
 330                 public virtual string ThreeLetterWindowsLanguageName
 331                 {
 332                         get {
 333                                 if (!constructed) Construct ();
 334                                 return(win3lang);
 335                         }
 336                 }
 337
 338                 public virtual string TwoLetterISOLanguageName {
 339                         get {
 340                                 if (!constructed) Construct ();
 341                                 return(iso2lang);
 342                         }
 343                 }
 344
 345                 public bool UseUserOverride
 346                 {
 347                         get {
 348                                 return m_useUserOverride;
 349                         }
 350                 }
 351
 352                 public void ClearCachedData()
 353                 {
 354                         Thread.CurrentThread.CurrentCulture = null;
 355                         Thread.CurrentThread.CurrentUICulture = null;
 356                 }
 357
 358                 public virtual object Clone()
 359                 {
 360                         if (!constructed) Construct ();
 361                         CultureInfo ci=(CultureInfo)MemberwiseClone ();
 362                         ci.m_isReadOnly=false;
 363                         ci.cached_serialized_form=null;
 364                         if (!IsNeutralCulture) {
 365                                 ci.NumberFormat = (NumberFormatInfo)NumberFormat.Clone ();
 366                                 ci.DateTimeFormat = (DateTimeFormatInfo)DateTimeFormat.Clone ();
 367                         }
 368                         return(ci);
 369                 }
 370
 371                 public override bool Equals (object value)
 372                 {
 373                         CultureInfo b = value as CultureInfo;
 374
 375                         if (b != null)
 376                                 return b.cultureID == cultureID;
 377                         return false;
 378                 }
 379
 380                 public static CultureInfo[] GetCultures(CultureTypes types)
 381                 {
 382                         bool neutral=((types & CultureTypes.NeutralCultures)!=0);
 383                         bool specific=((types & CultureTypes.SpecificCultures)!=0);
 384                         bool installed=((types & CultureTypes.InstalledWin32Cultures)!=0);  // TODO
 385
 386                         CultureInfo [] infos = internal_get_cultures (neutral, specific, installed);
 387                         // The runtime returns a NULL in the first position of the array when
 388                         // 'neutral' is true. We fill it in with a clone of InvariantCulture
 389                         // since it must not be read-only
 390                         if (neutral && infos.Length > 0 && infos [0] == null) {
 391                                 infos [0] = (CultureInfo) InvariantCulture.Clone ();
 392                         }
 393
 394                         return infos;
 395                 }
 396
 397                 public override int GetHashCode ()
 398                 {
 399                         return cultureID.GetHashCode ();
 400                 }
 401
 402                 public static CultureInfo ReadOnly(CultureInfo ci)
 403                 {
 404                         if(ci==null) {
 405                                 throw new ArgumentNullException("ci");
 406                         }
 407
 408                         if(ci.m_isReadOnly) {
 409                                 return(ci);
 410                         } else {
 411                                 CultureInfo new_ci=(CultureInfo)ci.Clone ();
 412                                 new_ci.m_isReadOnly=true;
 413                                 if (new_ci.numInfo != null)
 414                                         new_ci.numInfo = NumberFormatInfo.ReadOnly (new_ci.numInfo);
 415                                 if (new_ci.dateTimeInfo != null)
 416                                         new_ci.dateTimeInfo = DateTimeFormatInfo.ReadOnly (new_ci.dateTimeInfo);
 417                                 if (new_ci.textInfo != null)
 418                                         new_ci.textInfo = TextInfo.ReadOnly (new_ci.textInfo);
 419                                 return(new_ci);
 420                         }
 421                 }
 422
 423                 public override string ToString()
 424                 {
 425                         return(m_name);
 426                 }
 427
 428                 public virtual CompareInfo CompareInfo
 429                 {
 430                         get {
 431                                 if(compareInfo==null) {
 432                                         if (!constructed)
 433                                                 Construct ();
 434
 435                                         lock (this) {
 436                                                 if(compareInfo==null) {
 437                                                         compareInfo=new CompareInfo (this);
 438                                                 }
 439                                         }
 440                                 }
 441
 442                                 return(compareInfo);
 443                         }
 444                 }
 445
 446                 public virtual bool IsNeutralCulture {
 447                         get {
 448                                 if (cultureID == InvariantCultureId)
 449                                         return false;
 450
 451                                 if (!constructed) Construct ();
 452                                 return territory == null;
 453                         }
 454                 }
 455
 456                 internal void CheckNeutral ()
 457                 {
 458 #if !NET_4_0
 459                         if (IsNeutralCulture) {
 460                                 throw new NotSupportedException ("Culture \"" + m_name + "\" is " +
 461                                                 "a neutral culture. It can not be used in formatting " +
 462                                                 "and parsing and therefore cannot be set as the thread's " +
 463                                                 "current culture.");
 464                         }
 465 #endif
 466                 }
 467
 468                 public virtual NumberFormatInfo NumberFormat {
 469                         get {
 470                                 if (!constructed) Construct ();
 471                                 CheckNeutral ();
 472                                 if (numInfo == null){
 473                                         lock (this){
 474                                                 if (numInfo == null) {
 475                                                         numInfo = new NumberFormatInfo (m_isReadOnly);
 476                                                         construct_number_format ();
 477                                                 }
 478                                         }
 479                                 }
 480
 481                                 return numInfo;
 482                         }
 483
 484                         set {
 485                                 if (!constructed) Construct ();
 486                                 if (m_isReadOnly) throw new InvalidOperationException(MSG_READONLY);
 487
 488                                 if (value == null)
 489                                         throw new ArgumentNullException ("NumberFormat");
 490
 491                                 numInfo = value;
 492                         }
 493                 }
 494
 495                 public virtual DateTimeFormatInfo DateTimeFormat {
 496                         get {
 497                                 if (dateTimeInfo != null)
 498                                         return dateTimeInfo;
 499
 500                                 if (!constructed) Construct ();
 501                                 CheckNeutral ();
 502
 503                                 // TODO: Have to lock because construct_datetime_format is not atomic
 504                                 lock (this) {
 505                                         if (cultureID == InvariantCultureId && m_isReadOnly)
 506                                                 dateTimeInfo = DateTimeFormatInfo.InvariantInfo;
 507                                         else if (dateTimeInfo == null) {
 508                                                 dateTimeInfo = new DateTimeFormatInfo (this, m_isReadOnly);
 509                                                 if (cultureID != InvariantCultureId)
 510                                                         construct_datetime_format ();
 511                                         }
 512                                 }
 513
 514                                 return dateTimeInfo;
 515                         }
 516
 517                         set {
 518                                 if (!constructed) Construct ();
 519                                 if (m_isReadOnly) throw new InvalidOperationException(MSG_READONLY);
 520
 521                                 if (value == null)
 522                                         throw new ArgumentNullException ("DateTimeFormat");
 523
 524                                 dateTimeInfo = value;
 525                         }
 526                 }
 527
 528                 public virtual string DisplayName {
 529                         get {
 530                                 // Mono is not localized and will always return english name regardless of OS locale
 531                                 return EnglishName;
 532                         }
 533                 }
 534
 535                 public virtual string EnglishName {
 536                         get {
 537                                 if (!constructed) Construct ();
 538                                 return englishname;
 539                         }
 540                 }
 541
 542                 public static CultureInfo InstalledUICulture
 543                 {
 544                         get { return GetCultureInfo (BootstrapCultureID); }
 545                 }
 546
 547                 public bool IsReadOnly {
 548                         get {
 549                                 return m_isReadOnly;
 550                         }
 551                 }
 552
 553
 554                 //
 555                 // IFormatProvider implementation
 556                 //
 557                 public virtual object GetFormat( Type formatType )
 558                 {
 559                         object format = null;
 560
 561                         if ( formatType == typeof(NumberFormatInfo) )
 562                                 format = NumberFormat;
 563                         else if ( formatType == typeof(DateTimeFormatInfo) )
 564                                 format = DateTimeFormat;
 565
 566                         return format;
 567                 }
 568
 569                 void Construct ()
 570                 {
 571                         construct_internal_locale_from_lcid (cultureID);
 572                         constructed = true;
 573                 }
 574
 575                 static bool ConstructInternalLocaleFromCurrentLocale (CultureInfo ci)
 576                 {
 577                         if (!construct_internal_locale_from_current_locale (ci))
 578                                 return false;
 579                         return true;
 580                 }
 581
 582                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 583                 private extern bool construct_internal_locale_from_lcid (int lcid);
 584
 585                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 586                 private extern bool construct_internal_locale_from_name (string name);
 587
 588 //              [MethodImplAttribute (MethodImplOptions.InternalCall)]
 589 //              private extern static bool construct_internal_locale_from_specific_name (CultureInfo ci, string name);
 590
 591                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 592                 private extern static bool construct_internal_locale_from_current_locale (CultureInfo ci);
 593
 594                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 595                 private extern static CultureInfo [] internal_get_cultures (bool neutral, bool specific, bool installed);
 596
 597                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 598                 private extern void construct_datetime_format ();
 599
 600                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 601                 private extern void construct_number_format ();
 602
 603                 private void ConstructInvariant (bool read_only)
 604                 {
 605                         cultureID = InvariantCultureId;
 606
 607                         /* NumberFormatInfo defaults to the invariant data */
 608                         numInfo=NumberFormatInfo.InvariantInfo;
 609
 610                         if (!read_only) {
 611                                 numInfo = (NumberFormatInfo) numInfo.Clone ();
 612                         }
 613
 614                         textInfo = CreateTextInfo (read_only);
 615
 616                         m_name=String.Empty;
 617                         englishname=
 618                         nativename="Invariant Language (Invariant Country)";
 619                         iso3lang="IVL";
 620                         iso2lang="iv";
 621                         win3lang="IVL";
 622                         default_calendar_type = 1 << CalendarTypeBits;
 623                 }
 624
 625                 private unsafe TextInfo CreateTextInfo (bool readOnly)
 626                 {
 627                         return new TextInfo (this, cultureID, this.textinfo_data, readOnly);
 628                 }
 629
 630                 public CultureInfo (int culture) : this (culture, true) {}
 631
 632                 public CultureInfo (int culture, bool useUserOverride) :
 633                         this (culture, useUserOverride, false) {}
 634
 635                 private CultureInfo (int culture, bool useUserOverride, bool read_only)
 636                 {
 637                         if (culture < 0)
 638                                 throw new ArgumentOutOfRangeException ("culture", "Positive "
 639                                         + "number required.");
 640
 641                         constructed = true;
 642                         m_isReadOnly = read_only;
 643                         m_useUserOverride = useUserOverride;
 644
 645                         if (culture == InvariantCultureId) {
 646                                 /* Short circuit the invariant culture */
 647                                 ConstructInvariant (read_only);
 648                                 return;
 649                         }
 650
 651                         if (!construct_internal_locale_from_lcid (culture)) {
 652 #if NET_4_0
 653                                 throw new CultureNotFoundException ("culture",
 654                                         String.Format ("Culture ID {0} (0x{0:X4}) is not a " +
 655                                                         "supported culture.", culture));
 656 #else
 657                                 throw new ArgumentException (
 658                                         String.Format ("Culture ID {0} (0x{0:X4}) is not a " +
 659                                                         "supported culture.", culture), "culture");
 660 #endif
 661                         }
 662                 }
 663
 664                 public CultureInfo (string name) : this (name, true) {}
 665
 666                 public CultureInfo (string name, bool useUserOverride) :
 667                         this (name, useUserOverride, false) {}
 668
 669                 private CultureInfo (string name, bool useUserOverride, bool read_only)
 670                 {
 671                         if (name == null)
 672                                 throw new ArgumentNullException ("name");
 673
 674                         constructed = true;
 675                         m_isReadOnly = read_only;
 676                         m_useUserOverride = useUserOverride;
 677
 678                         if (name.Length == 0) {
 679                                 /* Short circuit the invariant culture */
 680                                 ConstructInvariant (read_only);
 681                                 return;
 682                         }
 683
 684                         if (!construct_internal_locale_from_name (name.ToLowerInvariant ())) {
 685 #if NET_4_0
 686                                 throw new CultureNotFoundException ("name",
 687                                                 "Culture name " + name + " is not supported.");
 688 #else
 689                                 throw new ArgumentException ("Culture name " + name +
 690                                                 " is not supported.", "name");
 691 #endif
 692                         }
 693                 }
 694
 695                 // This is used when creating by specific name and creating by
 696                 // current locale so we can initialize the object without
 697                 // doing any member initialization
 698                 private CultureInfo () { constructed = true; }
 699                 static Dictionary<int, CultureInfo> shared_by_number;
 700                 static Dictionary<string, CultureInfo> shared_by_name;
 701
 702                 static void insert_into_shared_tables (CultureInfo c)
 703                 {
 704                         if (shared_by_number == null){
 705                                 shared_by_number = new Dictionary<int, CultureInfo> ();
 706                                 shared_by_name = new Dictionary<string, CultureInfo> ();
 707                         }
 708                         shared_by_number [c.cultureID] = c;
 709                         shared_by_name [c.m_name] = c;
 710                 }
 711
 712                 public static CultureInfo GetCultureInfo (int culture)
 713                 {
 714                         CultureInfo c;
 715
 716                         lock (shared_table_lock){
 717                                 if (shared_by_number != null) {
 718                                         if (shared_by_number.TryGetValue (culture, out c))
 719                                                 return c;
 720                                 }
 721
 722                                 c = new CultureInfo (culture, false, true);
 723                                 insert_into_shared_tables (c);
 724                                 return c;
 725                         }
 726                 }
 727
 728                 public static CultureInfo GetCultureInfo (string name)
 729                 {
 730                         if (name == null)
 731                                 throw new ArgumentNullException ("name");
 732
 733                         CultureInfo c;
 734                         lock (shared_table_lock){
 735                                 if (shared_by_name != null){
 736                                         if (shared_by_name.TryGetValue (name, out c))
 737                                                 return c;
 738                                 }
 739                                 c = new CultureInfo (name, false, true);
 740                                 insert_into_shared_tables (c);
 741                                 return c;
 742                         }
 743                 }
 744
 745                 [MonoTODO ("Currently it ignores the altName parameter")]
 746                 public static CultureInfo GetCultureInfo (string name, string altName) {
 747                         if (name == null)
 748                                 throw new ArgumentNullException ("null");
 749                         if (altName == null)
 750                                 throw new ArgumentNullException ("null");
 751
 752                         return GetCultureInfo (name);
 753                 }
 754
 755                 public static CultureInfo GetCultureInfoByIetfLanguageTag (string name)
 756                 {
 757                         // There could be more consistent way to implement
 758                         // it, but right now it works just fine with this...
 759                         switch (name) {
 760                         case "zh-Hans":
 761                                 return GetCultureInfo ("zh-CHS");
 762                         case "zh-Hant":
 763                                 return GetCultureInfo ("zh-CHT");
 764                         default:
 765                                 return GetCultureInfo (name);
 766                         }
 767                 }
 768
 769                 // used in runtime (icall.c) to construct CultureInfo for
 770                 // AssemblyName of assemblies
 771                 internal static CultureInfo CreateCulture (string name, bool reference)
 772                 {
 773                         bool read_only;
 774                         bool use_user_override;
 775
 776                         bool invariant = name.Length == 0;
 777                         if (reference) {
 778                                 use_user_override = invariant ? false : true;
 779                                 read_only = false;
 780                         } else {
 781                                 read_only = false;
 782                                 use_user_override = invariant ? false : true;
 783                         }
 784
 785                         return new CultureInfo (name, use_user_override, read_only);
 786                 }
 787
 788                 public static CultureInfo CreateSpecificCulture (string name)
 789                 {
 790                         if (name == null)
 791                                 throw new ArgumentNullException ("name");
 792
 793                         if (name.Length == 0)
 794                                 return InvariantCulture;
 795
 796                         CultureInfo ci = null;
 797                         try {
 798                                 ci = new CultureInfo (name);
 799                         } catch (Exception) {
 800                                 // TODO: Use construct_internal_locale_from_name when it's not bound to constructor instead
 801                                 // of try-catch
 802                                 int idx = name.IndexOf ('-');
 803                                 if (idx > 0) {
 804                                         try {
 805                                                 ci = new CultureInfo (name.Substring (0, idx));
 806                                         } catch {
 807                                         }
 808                                 }
 809
 810                                 if (ci == null)
 811                                         throw;
 812                         }
 813
 814                         if (!ci.IsNeutralCulture)
 815                                 return ci;
 816
 817                         return CreateSpecificCultureFromNeutral (ci.Name);
 818                 }
 819
 820                 //
 821                 // Creates specific culture from neutral culture. Used by CreateSpecificCulture
 822                 // only but using separate method we can delay switch underlying Dictionary
 823                 // initialization
 824                 //
 825                 static CultureInfo CreateSpecificCultureFromNeutral (string name)
 826                 {
 827                         int id;
 828
 829                         //
 830                         // For neutral cultures find predefined default specific culture
 831                         //
 832                         // Use managed switch because we need this for only some cultures
 833                         // and the method is not used frequently
 834                         //
 835                         // TODO: We could optimize for cultures with single specific culture
 836                         //
 837                         switch (name.ToLowerInvariant ()) {
 838                         case "af": id = 1078; break;
 839                         case "am": id = 1118; break;
 840                         case "ar": id = 1025; break;
 841                         case "arn": id = 1146; break;
 842                         case "as": id = 1101; break;
 843                         case "az": id = 1068; break;
 844                         case "az-Cyrl": id = 2092; break;
 845                         case "az-Latn": id = 1068; break;
 846                         case "ba": id = 1133; break;
 847                         case "be": id = 1059; break;
 848                         case "bg": id = 1026; break;
 849                         case "bn": id = 1093; break;
 850                         case "bo": id = 1105; break;
 851                         case "br": id = 1150; break;
 852                         case "bs": id = 5146; break;
 853                         case "bs-Cyrl": id = 8218; break;
 854                         case "bs-Latn": id = 5146; break;
 855                         case "ca": id = 1027; break;
 856                         case "co": id = 1155; break;
 857                         case "cs": id = 1029; break;
 858                         case "cy": id = 1106; break;
 859                         case "da": id = 1030; break;
 860                         case "de": id = 1031; break;
 861                         case "dsb": id = 2094; break;
 862                         case "dv": id = 1125; break;
 863                         case "el": id = 1032; break;
 864                         case "en": id = 1033; break;
 865                         case "es": id = 3082; break;
 866                         case "et": id = 1061; break;
 867                         case "eu": id = 1069; break;
 868                         case "fa": id = 1065; break;
 869                         case "fi": id = 1035; break;
 870                         case "fil": id = 1124; break;
 871                         case "fo": id = 1080; break;
 872                         case "fr": id = 1036; break;
 873                         case "fy": id = 1122; break;
 874                         case "ga": id = 2108; break;
 875                         case "gd": id = 1169; break;
 876                         case "gl": id = 1110; break;
 877                         case "gsw": id = 1156; break;
 878                         case "gu": id = 1095; break;
 879                         case "ha": id = 1128; break;
 880                         case "ha-Latn": id = 1128; break;
 881                         case "he": id = 1037; break;
 882                         case "hi": id = 1081; break;
 883                         case "hr": id = 1050; break;
 884                         case "hsb": id = 1070; break;
 885                         case "hu": id = 1038; break;
 886                         case "hy": id = 1067; break;
 887                         case "id": id = 1057; break;
 888                         case "ig": id = 1136; break;
 889                         case "ii": id = 1144; break;
 890                         case "is": id = 1039; break;
 891                         case "it": id = 1040; break;
 892                         case "iu": id = 2141; break;
 893                         case "iu-Cans": id = 1117; break;
 894                         case "iu-Latn": id = 2141; break;
 895                         case "ja": id = 1041; break;
 896                         case "ka": id = 1079; break;
 897                         case "kk": id = 1087; break;
 898                         case "kl": id = 1135; break;
 899                         case "km": id = 1107; break;
 900                         case "kn": id = 1099; break;
 901                         case "ko": id = 1042; break;
 902                         case "kok": id = 1111; break;
 903                         case "ky": id = 1088; break;
 904                         case "lb": id = 1134; break;
 905                         case "lo": id = 1108; break;
 906                         case "lt": id = 1063; break;
 907                         case "lv": id = 1062; break;
 908                         case "mi": id = 1153; break;
 909                         case "mk": id = 1071; break;
 910                         case "ml": id = 1100; break;
 911                         case "mn": id = 1104; break;
 912                         case "mn-Cyrl": id = 1104; break;
 913                         case "mn-Mong": id = 2128; break;
 914                         case "moh": id = 1148; break;
 915                         case "mr": id = 1102; break;
 916                         case "ms": id = 1086; break;
 917                         case "mt": id = 1082; break;
 918                         case "nb": id = 1044; break;
 919                         case "ne": id = 1121; break;
 920                         case "nl": id = 1043; break;
 921                         case "nn": id = 2068; break;
 922                         case "no": id = 1044; break;
 923                         case "nso": id = 1132; break;
 924                         case "oc": id = 1154; break;
 925                         case "or": id = 1096; break;
 926                         case "pa": id = 1094; break;
 927                         case "pl": id = 1045; break;
 928                         case "prs": id = 1164; break;
 929                         case "ps": id = 1123; break;
 930                         case "pt": id = 1046; break;
 931                         case "qut": id = 1158; break;
 932                         case "quz": id = 1131; break;
 933                         case "rm": id = 1047; break;
 934                         case "ro": id = 1048; break;
 935                         case "ru": id = 1049; break;
 936                         case "rw": id = 1159; break;
 937                         case "sa": id = 1103; break;
 938                         case "sah": id = 1157; break;
 939                         case "se": id = 1083; break;
 940                         case "si": id = 1115; break;
 941                         case "sk": id = 1051; break;
 942                         case "sl": id = 1060; break;
 943                         case "sma": id = 7227; break;
 944                         case "smj": id = 5179; break;
 945                         case "smn": id = 9275; break;
 946                         case "sms": id = 8251; break;
 947                         case "sq": id = 1052; break;
 948                         case "sr": id = 9242; break;
 949                         case "sr-Cyrl": id = 10266; break;
 950                         case "sr-Latn": id = 9242; break;
 951                         case "sv": id = 1053; break;
 952                         case "sw": id = 1089; break;
 953                         case "syr": id = 1114; break;
 954                         case "ta": id = 1097; break;
 955                         case "te": id = 1098; break;
 956                         case "tg": id = 1064; break;
 957                         case "tg-Cyrl": id = 1064; break;
 958                         case "th": id = 1054; break;
 959                         case "tk": id = 1090; break;
 960                         case "tn": id = 1074; break;
 961                         case "tr": id = 1055; break;
 962                         case "tt": id = 1092; break;
 963                         case "tzm": id = 2143; break;
 964                         case "tzm-Latn": id = 2143; break;
 965                         case "ug": id = 1152; break;
 966                         case "uk": id = 1058; break;
 967                         case "ur": id = 1056; break;
 968                         case "uz": id = 1091; break;
 969                         case "uz-Cyrl": id = 2115; break;
 970                         case "uz-Latn": id = 1091; break;
 971                         case "vi": id = 1066; break;
 972                         case "wo": id = 1160; break;
 973                         case "xh": id = 1076; break;
 974                         case "yo": id = 1130; break;
 975                         case "zh": id = 2052; break;
 976                         case "zh-CHS": case "zh-Hans":
 977                                 id = 2052; break;
 978                         case "zh-CHT": case "zh-Hant":
 979                                 id = 3076; break;
 980                         case "zu": id = 1077; break;
 981                         default:
 982                                 throw new NotImplementedException ("Mapping for neutral culture " + name);
 983                         }
 984
 985                         return new CultureInfo (id);
 986                 }
 987
 988                 static Calendar CreateCalendar (int calendarType)
 989                 {
 990                         string name = null;
 991                         switch (calendarType >> CalendarTypeBits) {
 992                         case 1:
 993                                 GregorianCalendarTypes greg_type;
 994                                 greg_type = (GregorianCalendarTypes) (calendarType & 0xFF);
 995                                 return new GregorianCalendar (greg_type);
 996                         case 2:
 997                                 name = "System.Globalization.ThaiBuddhistCalendar";
 998                                 break;
 999                         case 3:
1000                                 name = "System.Globalization.UmAlQuraCalendar";
1001                                 break;
1002                         case 4:
1003                                 name = "System.Globalization.HijriCalendar";
1004                                 break;
1005                         default:
1006                                 throw new NotImplementedException ("Unknown calendar type: " + calendarType);
1007                         }
1008
1009                         Type type = Type.GetType (name, false);
1010                         if (type == null)
1011                                 return CreateCalendar (1 << CalendarTypeBits); // return invariant calandar if not found
1012                         return (Calendar) Activator.CreateInstance (type);
1013                 }
1014
1015 #if NET_4_5
1016                 public static CultureInfo DefaultThreadCurrentCulture {
1017                         get {
1018                                 return Thread.default_culture;
1019                         }
1020                         set {
1021                                 Thread.default_culture = value;
1022                         }
1023                 }
1024
1025                 public static CultureInfo DefaultThreadCurrentUICulture {
1026                         get {
1027                                 return Thread.default_ui_culture;
1028                         }
1029                         set {
1030                                 Thread.default_ui_culture = value;
1031                         }
1032                 }
1033 #endif
1034         }
1035 }