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