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CultureInfo.cs
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CultureInfo.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
////////////////////////////////////////////////////////////////////////////
//
//
//
// Purpose: This class represents the software preferences of a particular
// culture or community. It includes information such as the
// language, writing system, and a calendar used by the culture
// as well as methods for common operations such as printing
// dates and sorting strings.
//
//
//
// !!!! NOTE WHEN CHANGING THIS CLASS !!!!
//
// If adding or removing members to this class, please update CultureInfoBaseObject
// in ndp/clr/src/vm/object.h. Note, the "actual" layout of the class may be
// different than the order in which members are declared. For instance, all
// reference types will come first in the class before value types (like ints, bools, etc)
// regardless of the order in which they are declared. The best way to see the
// actual order of the class is to do a !dumpobj on an instance of the managed
// object inside of the debugger.
//
////////////////////////////////////////////////////////////////////////////
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Threading;
namespace System.Globalization
{
/// <summary>
/// This class represents the software preferences of a particular culture
/// or community. It includes information such as the language, writing
/// system and a calendar used by the culture as well as methods for
/// common operations such as printing dates and sorting strings.
/// </summary>
/// <remarks>
/// !!!! NOTE WHEN CHANGING THIS CLASS !!!!
/// If adding or removing members to this class, please update
/// CultureInfoBaseObject in ndp/clr/src/vm/object.h. Note, the "actual"
/// layout of the class may be different than the order in which members
/// are declared. For instance, all reference types will come first in the
/// class before value types (like ints, bools, etc) regardless of the
/// order in which they are declared. The best way to see the actual
/// order of the class is to do a !dumpobj on an instance of the managed
/// object inside of the debugger.
/// </remarks>
public partial class CultureInfo : IFormatProvider, ICloneable
{
// We use an RFC4646 type string to construct CultureInfo.
// This string is stored in _name and is authoritative.
// We use the _cultureData to get the data for our object
private bool _isReadOnly;
private CompareInfo? _compareInfo;
private TextInfo? _textInfo;
internal NumberFormatInfo? _numInfo;
internal DateTimeFormatInfo? _dateTimeInfo;
private Calendar? _calendar;
//
// The CultureData instance that we are going to read data from.
// For supported culture, this will be the CultureData instance that read data from mscorlib assembly.
// For customized culture, this will be the CultureData instance that read data from user customized culture binary file.
//
internal CultureData _cultureData;
internal bool _isInherited;
private CultureInfo? _consoleFallbackCulture;
// Names are confusing. Here are 3 names we have:
//
// new CultureInfo() _name _nonSortName _sortName
// en-US en-US en-US en-US
// de-de_phoneb de-DE_phoneb de-DE de-DE_phoneb
// fj-fj (custom) fj-FJ fj-FJ en-US (if specified sort is en-US)
// en en
//
// Note that in Silverlight we ask the OS for the text and sort behavior, so the
// textinfo and compareinfo names are the same as the name
// This has a de-DE, de-DE_phoneb or fj-FJ style name
internal string _name;
// This will hold the non sorting name to be returned from CultureInfo.Name property.
// This has a de-DE style name even for de-DE_phoneb type cultures
private string? _nonSortName;
// This will hold the sorting name to be returned from CultureInfo.SortName property.
// This might be completely unrelated to the culture name if a custom culture. Ie en-US for fj-FJ.
// Otherwise its the sort name, ie: de-DE or de-DE_phoneb
private string? _sortName;
// Get the current user default culture. This one is almost always used, so we create it by default.
private static volatile CultureInfo? s_userDefaultCulture;
// The culture used in the user interface. This is mostly used to load correct localized resources.
private static volatile CultureInfo? s_userDefaultUICulture;
// The Invariant culture;
private static readonly CultureInfo s_InvariantCultureInfo = new CultureInfo(CultureData.Invariant, isReadOnly: true);
// These are defaults that we use if a thread has not opted into having an explicit culture
private static volatile CultureInfo? s_DefaultThreadCurrentUICulture;
private static volatile CultureInfo? s_DefaultThreadCurrentCulture;
[ThreadStatic]
private static CultureInfo? s_currentThreadCulture;
[ThreadStatic]
private static CultureInfo? s_currentThreadUICulture;
private static AsyncLocal<CultureInfo>? s_asyncLocalCurrentCulture;
private static AsyncLocal<CultureInfo>? s_asyncLocalCurrentUICulture;
private static void AsyncLocalSetCurrentCulture(AsyncLocalValueChangedArgs<CultureInfo> args)
{
s_currentThreadCulture = args.CurrentValue;
}
private static void AsyncLocalSetCurrentUICulture(AsyncLocalValueChangedArgs<CultureInfo> args)
{
s_currentThreadUICulture = args.CurrentValue;
}
private static Dictionary<string, CultureInfo>? s_cachedCulturesByName;
private static Dictionary<int, CultureInfo>? s_cachedCulturesByLcid;
// The parent culture.
private CultureInfo? _parent;
// LOCALE constants of interest to us internally and privately for LCID functions
// (ie: avoid using these and use names if possible)
internal const int LOCALE_NEUTRAL = 0x0000;
private const int LOCALE_USER_DEFAULT = 0x0400;
private const int LOCALE_SYSTEM_DEFAULT = 0x0800;
internal const int LOCALE_CUSTOM_UNSPECIFIED = 0x1000;
internal const int LOCALE_CUSTOM_DEFAULT = 0x0c00;
internal const int LOCALE_INVARIANT = 0x007F;
private static CultureInfo InitializeUserDefaultCulture()
{
Interlocked.CompareExchange(ref s_userDefaultCulture, GetUserDefaultCulture(), null);
return s_userDefaultCulture!;
}
private static CultureInfo InitializeUserDefaultUICulture()
{
Interlocked.CompareExchange(ref s_userDefaultUICulture, GetUserDefaultUICulture(), null);
return s_userDefaultUICulture!;
}
private static string GetCultureNotSupportedExceptionMessage() => GlobalizationMode.Invariant ? SR.Argument_CultureNotSupportedInInvariantMode : SR.Argument_CultureNotSupported;
public CultureInfo(string name) : this(name, true)
{
}
public CultureInfo(string name, bool useUserOverride)
{
ArgumentNullException.ThrowIfNull(name);
// Get our data providing record
CultureData? cultureData = CultureData.GetCultureData(name, useUserOverride);
if (cultureData == null)
{
throw new CultureNotFoundException(nameof(name), name, GetCultureNotSupportedExceptionMessage());
}
_cultureData = cultureData;
_name = _cultureData.CultureName;
_isInherited = GetType() != typeof(CultureInfo);
}
private CultureInfo(CultureData cultureData, bool isReadOnly = false)
{
Debug.Assert(cultureData != null);
_cultureData = cultureData;
_name = cultureData.CultureName;
_isReadOnly = isReadOnly;
}
private static CultureInfo? CreateCultureInfoNoThrow(string name, bool useUserOverride)
{
Debug.Assert(name != null);
CultureData? cultureData = CultureData.GetCultureData(name, useUserOverride);
if (cultureData == null)
{
return null;
}
return new CultureInfo(cultureData);
}
public CultureInfo(int culture) : this(culture, true)
{
}
public CultureInfo(int culture, bool useUserOverride)
{
// We don't check for other invalid LCIDS here...
ArgumentOutOfRangeException.ThrowIfNegative(culture);
switch (culture)
{
case LOCALE_CUSTOM_DEFAULT:
case LOCALE_SYSTEM_DEFAULT:
case LOCALE_NEUTRAL:
case LOCALE_USER_DEFAULT:
case LOCALE_CUSTOM_UNSPECIFIED:
// Can't support unknown custom cultures and we do not support neutral or
// non-custom user locales.
throw new CultureNotFoundException(nameof(culture), culture, SR.Argument_CultureNotSupported);
default:
// Now see if this LCID is supported in the system default CultureData table.
_cultureData = CultureData.GetCultureData(culture, useUserOverride);
break;
}
_isInherited = GetType() != typeof(CultureInfo);
_name = _cultureData.CultureName;
}
/// <summary>
/// Constructor called by SQL Server's special munged culture - creates a culture with
/// a TextInfo and CompareInfo that come from a supplied alternate source. This object
/// is ALWAYS read-only.
/// Note that we really cannot use an LCID version of this override as the cached
/// name we create for it has to include both names, and the logic for this is in
/// the GetCultureInfo override *only*.
/// </summary>
internal CultureInfo(string cultureName, string textAndCompareCultureName)
{
ArgumentNullException.ThrowIfNull(textAndCompareCultureName);
CultureData? cultureData = CultureData.GetCultureData(cultureName, false) ??
throw new CultureNotFoundException(nameof(cultureName), cultureName, GetCultureNotSupportedExceptionMessage());
_cultureData = cultureData;
_name = _cultureData.CultureName;
CultureInfo altCulture = GetCultureInfo(textAndCompareCultureName);
_compareInfo = altCulture.CompareInfo;
_textInfo = altCulture.TextInfo;
}
/// <summary>
/// We do this to try to return the system UI language and the default user languages
/// This method will fallback if this fails (like Invariant)
/// </summary>
private static CultureInfo GetCultureByName(string name)
{
try
{
return new CultureInfo(name)
{
_isReadOnly = true
};
}
catch (ArgumentException)
{
return InvariantCulture;
}
}
/// <summary>
/// Return a specific culture. A tad irrelevant now since we always
/// return valid data for neutral locales.
///
/// Note that there's interesting behavior that tries to find a
/// smaller name, ala RFC4647, if we can't find a bigger name.
/// That doesn't help with things like "zh" though, so the approach
/// is of questionable value
/// </summary>
public static CultureInfo CreateSpecificCulture(string name)
{
CultureInfo? culture;
try
{
culture = new CultureInfo(name);
}
catch (ArgumentException)
{
// When CultureInfo throws this exception, it may be because someone passed the form
// like "az-az" because it came out of an http accept lang. We should try a little
// parsing to perhaps fall back to "az" here and use *it* to create the neutral.
culture = null;
for (int idx = 0; idx < name.Length; idx++)
{
if ('-' == name[idx])
{
try
{
culture = new CultureInfo(name.Substring(0, idx));
break;
}
catch (ArgumentException)
{
// throw the original exception so the name in the string will be right
throw;
}
}
}
if (culture == null)
{
// nothing to save here; throw the original exception
throw;
}
}
// In the most common case, they've given us a specific culture, so we'll just return that.
if (!culture.IsNeutralCulture)
{
return culture;
}
return new CultureInfo(culture._cultureData.SpecificCultureName);
}
internal static bool VerifyCultureName(string cultureName, bool throwException)
{
// This function is used by ResourceManager.GetResourceFileName().
// ResourceManager searches for resource using CultureInfo.Name,
// so we should check against CultureInfo.Name.
for (int i = 0; i < cultureName.Length; i++)
{
char c = cultureName[i];
// TODO: Names can only be RFC4646 names (ie: a-zA-Z0-9) while this allows any unicode letter/digit
if (char.IsLetterOrDigit(c) || c == '-' || c == '_')
{
continue;
}
if (throwException)
{
throw new ArgumentException(SR.Format(SR.Argument_InvalidResourceCultureName, cultureName));
}
return false;
}
return true;
}
internal static bool VerifyCultureName(CultureInfo culture, bool throwException)
{
// If we have an instance of one of our CultureInfos, the user can't have changed the
// name and we know that all names are valid in files.
if (!culture._isInherited)
{
return true;
}
return VerifyCultureName(culture.Name, throwException);
}
/// <summary>
/// This instance provides methods based on the current user settings.
/// These settings are volatile and may change over the lifetime of the
/// thread.
/// </summary>
/// <remarks>
/// We use the following order to return CurrentCulture and CurrentUICulture
/// o Use WinRT to return the current user profile language
/// o use current thread culture if the user already set one using CurrentCulture/CurrentUICulture
/// o use thread culture if the user already set one using DefaultThreadCurrentCulture
/// or DefaultThreadCurrentUICulture
/// o Use NLS default user culture
/// o Use NLS default system culture
/// o Use Invariant culture
/// </remarks>
public static CultureInfo CurrentCulture
{
get
{
return s_currentThreadCulture ??
s_DefaultThreadCurrentCulture ??
s_userDefaultCulture ??
InitializeUserDefaultCulture();
}
set
{
ArgumentNullException.ThrowIfNull(value);
if (s_asyncLocalCurrentCulture == null)
{
Interlocked.CompareExchange(ref s_asyncLocalCurrentCulture, new AsyncLocal<CultureInfo>(AsyncLocalSetCurrentCulture), null);
}
s_asyncLocalCurrentCulture!.Value = value;
}
}
public static CultureInfo CurrentUICulture
{
get
{
return s_currentThreadUICulture ??
s_DefaultThreadCurrentUICulture ??
UserDefaultUICulture;
}
set
{
ArgumentNullException.ThrowIfNull(value);
VerifyCultureName(value, true);
if (s_asyncLocalCurrentUICulture == null)
{
Interlocked.CompareExchange(ref s_asyncLocalCurrentUICulture, new AsyncLocal<CultureInfo>(AsyncLocalSetCurrentUICulture), null);
}
// this one will set s_currentThreadUICulture too
s_asyncLocalCurrentUICulture!.Value = value;
}
}
internal static CultureInfo UserDefaultUICulture => s_userDefaultUICulture ?? InitializeUserDefaultUICulture();
public static CultureInfo InstalledUICulture => s_userDefaultCulture ?? InitializeUserDefaultCulture();
public static CultureInfo? DefaultThreadCurrentCulture
{
get => s_DefaultThreadCurrentCulture;
set =>
// If you add pre-conditions to this method, check to see if you also need to
// add them to Thread.CurrentCulture.set.
s_DefaultThreadCurrentCulture = value;
}
public static CultureInfo? DefaultThreadCurrentUICulture
{
get => s_DefaultThreadCurrentUICulture;
set
{
// If they're trying to use a Culture with a name that we can't use in resource lookup,
// don't even let them set it on the thread.
// If you add more pre-conditions to this method, check to see if you also need to
// add them to Thread.CurrentUICulture.set.
if (value != null)
{
VerifyCultureName(value, true);
}
s_DefaultThreadCurrentUICulture = value;
}
}
/// <summary>
/// This instance provides methods, for example for casing and sorting,
/// that are independent of the system and current user settings. It
/// should be used only by processes such as some system services that
/// require such invariant results (eg. file systems). In general,
/// the results are not linguistically correct and do not match any
/// culture info.
/// </summary>
public static CultureInfo InvariantCulture
{
get
{
Debug.Assert(s_InvariantCultureInfo != null, "[CultureInfo.InvariantCulture] s_InvariantCultureInfo is null");
return s_InvariantCultureInfo;
}
}
/// <summary>
/// Return the parent CultureInfo for the current instance.
/// </summary>
public virtual CultureInfo Parent
{
get
{
if (_parent == null)
{
CultureInfo culture;
string parentName = _cultureData.ParentName;
if (parentName == "zh")
{
if (_name.Length == 5 && _name[2] == '-')
{
// We need to keep the parent chain for the zh cultures as follows to preserve the resource lookup compatibility
// zh-CN -> zh-Hans -> zh -> Invariant
// zh-HK -> zh-Hant -> zh -> Invariant
// zh-MO -> zh-Hant -> zh -> Invariant
// zh-SG -> zh-Hans -> zh -> Invariant
// zh-TW -> zh-Hant -> zh -> Invariant
if ((_name[3] == 'C' && _name[4] == 'N') || // zh-CN
(_name[3] == 'S' && _name[4] == 'G')) // zh-SG
{
parentName = "zh-Hans";
}
else if ((_name[3] == 'H' && _name[4] == 'K') || // zh-HK
(_name[3] == 'M' && _name[4] == 'O') || // zh-MO
(_name[3] == 'T' && _name[4] == 'W')) // zh-TW
{
parentName = "zh-Hant";
}
}
else if (_name.Length > 8 && _name.AsSpan(2, 4) is "-Han" && _name[7] == '-') // cultures like zh-Hant-* and zh-Hans-*
{
if (_name[6] == 't') // zh-Hant-*
{
parentName = "zh-Hant";
}
else if (_name[6] == 's') // zh-Hans-*
{
parentName = "zh-Hans";
}
}
}
if (string.IsNullOrEmpty(parentName))
{
culture = InvariantCulture;
}
else
{
culture = CreateCultureInfoNoThrow(parentName, _cultureData.UseUserOverride) ??
// For whatever reason our IPARENT or SPARENT wasn't correct, so use invariant
// We can't allow ourselves to fail. In case of custom cultures the parent of the
// current custom culture isn't installed.
InvariantCulture;
}
Interlocked.CompareExchange<CultureInfo?>(ref _parent, culture, null);
}
return _parent!;
}
}
public virtual int LCID => _cultureData.LCID;
public virtual int KeyboardLayoutId => _cultureData.KeyboardLayoutId;
public static CultureInfo[] GetCultures(CultureTypes types)
{
// internally we treat UserCustomCultures as Supplementals but v2
// treats as Supplementals and Replacements
if ((types & CultureTypes.UserCustomCulture) == CultureTypes.UserCustomCulture)
{
types |= CultureTypes.ReplacementCultures;
}
return CultureData.GetCultures(types);
}
/// <summary>
/// Returns the full name of the CultureInfo. The name is in format like
/// "en-US" This version does NOT include sort information in the name.
/// </summary>
public virtual string Name => _nonSortName ??= (_cultureData.Name ?? string.Empty);
/// <summary>
/// This one has the sort information (ie: de-DE_phoneb)
/// </summary>
internal string SortName => _sortName ??= _cultureData.SortName;
/// <summary>
/// The culture name to use to interop with the underlying native globalization libraries like ICU or Windows NLS APIs.
/// For example, we can have the name de_DE@collation=phonebook when using ICU for the German culture de-DE with the phonebook sorting behavior.
/// </summary>
internal string? InteropName => _cultureData.InteropName;
public string IetfLanguageTag =>
// special case the compatibility cultures
Name switch
{
"zh-CHT" => "zh-Hant",
"zh-CHS" => "zh-Hans",
_ => Name,
};
/// <summary>
/// Returns the full name of the CultureInfo in the localized language.
/// For example, if the localized language of the runtime is Spanish and the CultureInfo is
/// US English, "Ingles (Estados Unidos)" will be returned.
/// </summary>
public virtual string DisplayName
{
get
{
Debug.Assert(_name != null, "[CultureInfo.DisplayName] Always expect _name to be set");
return _cultureData.DisplayName;
}
}
/// <summary>
/// Returns the full name of the CultureInfo in the native language.
/// For example, if the CultureInfo is US English, "English
/// (United States)" will be returned.
/// </summary>
public virtual string NativeName => _cultureData.NativeName;
/// <summary>
/// Returns the full name of the CultureInfo in English.
/// For example, if the CultureInfo is US English, "English
/// (United States)" will be returned.
/// </summary>
public virtual string EnglishName => _cultureData.EnglishName;
/// <summary>
/// ie: en
/// </summary>
public virtual string TwoLetterISOLanguageName => _cultureData.TwoLetterISOLanguageName;
/// <summary>
/// ie: eng
/// </summary>
public virtual string ThreeLetterISOLanguageName => _cultureData.ThreeLetterISOLanguageName;
/// <summary>
/// Returns the 3 letter windows language name for the current instance. eg: "ENU"
/// The ISO names are much preferred
/// </summary>
public virtual string ThreeLetterWindowsLanguageName => _cultureData.ThreeLetterWindowsLanguageName;
/// <summary>
/// Gets the CompareInfo for this culture.
/// </summary>
public virtual CompareInfo CompareInfo => _compareInfo ??=
// Since CompareInfo's don't have any overrideable properties, get the CompareInfo from
// the Non-Overridden CultureInfo so that we only create one CompareInfo per culture
(UseUserOverride ? GetCultureInfo(_name).CompareInfo : new CompareInfo(this));
/// <summary>
/// Gets the TextInfo for this culture.
/// </summary>
public virtual TextInfo TextInfo
{
get
{
if (_textInfo == null)
{
// Make a new textInfo
TextInfo tempTextInfo = new TextInfo(_cultureData);
tempTextInfo.SetReadOnlyState(_isReadOnly);
_textInfo = tempTextInfo;
}
return _textInfo;
}
}
public override bool Equals([NotNullWhen(true)] object? value)
{
if (ReferenceEquals(this, value))
{
return true;
}
if (value is CultureInfo that)
{
// using CompareInfo to verify the data passed through the constructor
// CultureInfo(String cultureName, String textAndCompareCultureName)
return Name.Equals(that.Name) && CompareInfo.Equals(that.CompareInfo);
}
return false;
}
public override int GetHashCode()
{
return Name.GetHashCode() + CompareInfo.GetHashCode();
}
/// <summary>
/// Implements object.ToString(). Returns the name of the CultureInfo,
/// eg. "de-DE_phoneb", "en-US", or "fj-FJ".
/// </summary>
public override string ToString() => _name;
public virtual object? GetFormat(Type? formatType)
{
if (formatType == typeof(NumberFormatInfo))
{
return NumberFormat;
}
if (formatType == typeof(DateTimeFormatInfo))
{
return DateTimeFormat;
}
return null;
}
public virtual bool IsNeutralCulture => _cultureData.IsNeutralCulture;
public CultureTypes CultureTypes
{
get
{
CultureTypes types = _cultureData.IsNeutralCulture ?
CultureTypes.NeutralCultures :
CultureTypes.SpecificCultures;
if (CultureData.IsWin32Installed)
{
types |= CultureTypes.InstalledWin32Cultures;
}
if (_cultureData.IsSupplementalCustomCulture)
{
types |= CultureTypes.UserCustomCulture;
}
if (_cultureData.IsReplacementCulture)
{
types |= CultureTypes.ReplacementCultures;
}
return types;
}
}
public virtual NumberFormatInfo NumberFormat
{
get
{
if (_numInfo == null)
{
NumberFormatInfo temp = new NumberFormatInfo(_cultureData);
temp._isReadOnly = _isReadOnly;
Interlocked.CompareExchange(ref _numInfo, temp, null);
}
return _numInfo!;
}
set
{
ArgumentNullException.ThrowIfNull(value);
VerifyWritable();
_numInfo = value;
}
}
/// <summary>
/// Create a DateTimeFormatInfo, and fill in the properties according to
/// the CultureID.
/// </summary>
public virtual DateTimeFormatInfo DateTimeFormat
{
get
{
if (_dateTimeInfo == null)
{
// Change the calendar of DTFI to the specified calendar of this CultureInfo.
DateTimeFormatInfo temp = new DateTimeFormatInfo(_cultureData, this.Calendar);
temp._isReadOnly = _isReadOnly;
Interlocked.CompareExchange(ref _dateTimeInfo, temp, null);
}
return _dateTimeInfo!;
}
set
{
ArgumentNullException.ThrowIfNull(value);
VerifyWritable();
_dateTimeInfo = value;
}
}
public void ClearCachedData()
{
// reset the default culture values
#if TARGET_WINDOWS
UserDefaultLocaleName = GetUserDefaultLocaleName();
#endif
s_userDefaultCulture = GetUserDefaultCulture();
s_userDefaultUICulture = GetUserDefaultUICulture();
RegionInfo.s_currentRegionInfo = null;
#pragma warning disable 0618 // disable the obsolete warning
TimeZone.ResetTimeZone();
#pragma warning restore 0618
TimeZoneInfo.ClearCachedData();
s_cachedCulturesByLcid = null;
s_cachedCulturesByName = null;
CultureData.ClearCachedData();
}
/// <summary>
/// Map a Win32 CALID to an instance of supported calendar.
/// </summary>
/// <remarks>
/// Shouldn't throw exception since the calType value is from our data
/// table or from Win32 registry.
/// If we are in trouble (like getting a weird value from Win32
/// registry), just return the GregorianCalendar.
/// </remarks>
internal static Calendar GetCalendarInstance(CalendarId calType)
{
Debug.Assert(!GlobalizationMode.Invariant);
if (calType == CalendarId.GREGORIAN)
{
return new GregorianCalendar();
}
return GetCalendarInstanceRare(calType);
}
/// <summary>
/// This function exists as a shortcut to prevent us from loading all of the non-gregorian
/// calendars unless they're required.
/// </summary>
internal static Calendar GetCalendarInstanceRare(CalendarId calType)
{
Debug.Assert(calType != CalendarId.GREGORIAN, "calType!=CalendarId.GREGORIAN");
switch (calType)
{
case CalendarId.GREGORIAN_US: // Gregorian (U.S.) calendar
case CalendarId.GREGORIAN_ME_FRENCH: // Gregorian Middle East French calendar
case CalendarId.GREGORIAN_ARABIC: // Gregorian Arabic calendar
case CalendarId.GREGORIAN_XLIT_ENGLISH: // Gregorian Transliterated English calendar
case CalendarId.GREGORIAN_XLIT_FRENCH: // Gregorian Transliterated French calendar
return new GregorianCalendar((GregorianCalendarTypes)calType);
case CalendarId.TAIWAN: // Taiwan Era calendar
return new TaiwanCalendar();
case CalendarId.JAPAN: // Japanese Emperor Era calendar
return new JapaneseCalendar();
case CalendarId.KOREA: // Korean Tangun Era calendar
return new KoreanCalendar();
case CalendarId.THAI: // Thai calendar
return new ThaiBuddhistCalendar();
case CalendarId.HIJRI: // Hijri (Arabic Lunar) calendar
return new HijriCalendar();
case CalendarId.HEBREW: // Hebrew (Lunar) calendar
return new HebrewCalendar();
case CalendarId.UMALQURA:
return new UmAlQuraCalendar();
case CalendarId.PERSIAN:
return new PersianCalendar();
}
return new GregorianCalendar();
}
/// <summary>
/// Return/set the default calendar used by this culture.
/// This value can be overridden by regional option if this is a current culture.
/// </summary>
public virtual Calendar Calendar
{
get
{
if (_calendar == null)
{
// Get the default calendar for this culture. Note that the value can be
// from registry if this is a user default culture.
Calendar newObj = _cultureData.DefaultCalendar;
Interlocked.MemoryBarrier();
newObj.SetReadOnlyState(_isReadOnly);
_calendar = newObj;
}
return _calendar;
}
}
/// <summary>
/// Return an array of the optional calendar for this culture.
/// </summary>
public virtual Calendar[] OptionalCalendars
{
get
{
// This property always returns a new copy of the calendar array.
if (GlobalizationMode.Invariant)
{
return new[] { new GregorianCalendar() };
}
CalendarId[] calID = _cultureData.CalendarIds;
Calendar[] cals = new Calendar[calID.Length];
for (int i = 0; i < cals.Length; i++)
{
cals[i] = GetCalendarInstance(calID[i]);
}
return cals;
}
}
public bool UseUserOverride => _cultureData.UseUserOverride;
public CultureInfo GetConsoleFallbackUICulture()
{
CultureInfo? temp = _consoleFallbackCulture;
if (temp == null)
{
temp = CreateSpecificCulture(_cultureData.SCONSOLEFALLBACKNAME);
temp._isReadOnly = true;
_consoleFallbackCulture = temp;
}
return temp;
}
public virtual object Clone()
{
CultureInfo ci = (CultureInfo)MemberwiseClone();
ci._isReadOnly = false;
// If this is exactly our type, we can make certain optimizations so that we don't allocate NumberFormatInfo or DTFI unless
// they've already been allocated. If this is a derived type, we'll take a more generic codepath.
if (!_isInherited)
{
if (_dateTimeInfo != null)
{
ci._dateTimeInfo = (DateTimeFormatInfo)_dateTimeInfo.Clone();
}
if (_numInfo != null)
{
ci._numInfo = (NumberFormatInfo)_numInfo.Clone();
}
}
else
{
ci.DateTimeFormat = (DateTimeFormatInfo)this.DateTimeFormat.Clone();
ci.NumberFormat = (NumberFormatInfo)this.NumberFormat.Clone();
}
if (_textInfo != null)
{
ci._textInfo = (TextInfo)_textInfo.Clone();
}
if (_dateTimeInfo != null && _dateTimeInfo.Calendar == _calendar)
{
// Usually when we access CultureInfo.DateTimeFormat first time, we create the DateTimeFormatInfo object
// using CultureInfo.Calendar. i.e. CultureInfo.DateTimeInfo.Calendar == CultureInfo.calendar.
// When cloning CultureInfo, if we know it's still the case that CultureInfo.DateTimeInfo.Calendar == CultureInfo.calendar
// then we can keep the same behavior for the cloned object and no need to create another calendar object.
ci._calendar = ci.DateTimeFormat.Calendar;
}
else if (_calendar != null)
{
ci._calendar = (Calendar)_calendar.Clone();
}
return ci;
}
public static CultureInfo ReadOnly(CultureInfo ci)
{
ArgumentNullException.ThrowIfNull(ci);
if (ci.IsReadOnly)
{
return ci;
}
CultureInfo newInfo = (CultureInfo)(ci.MemberwiseClone());
if (!ci.IsNeutralCulture)
{
// If this is exactly our type, we can make certain optimizations so that we don't allocate NumberFormatInfo or DTFI unless
// they've already been allocated. If this is a derived type, we'll take a more generic codepath.
if (!ci._isInherited)
{
if (ci._dateTimeInfo != null)
{
newInfo._dateTimeInfo = DateTimeFormatInfo.ReadOnly(ci._dateTimeInfo);
}
if (ci._numInfo != null)
{
newInfo._numInfo = NumberFormatInfo.ReadOnly(ci._numInfo);
}
}
else
{
newInfo.DateTimeFormat = DateTimeFormatInfo.ReadOnly(ci.DateTimeFormat);
newInfo.NumberFormat = NumberFormatInfo.ReadOnly(ci.NumberFormat);
}
}
if (ci._textInfo != null)
{
newInfo._textInfo = TextInfo.ReadOnly(ci._textInfo);
}
if (ci._calendar != null)
{
newInfo._calendar = Calendar.ReadOnly(ci._calendar);
}
// Don't set the read-only flag too early.
// We should set the read-only flag here. Otherwise, info.DateTimeFormat will not be able to set.
newInfo._isReadOnly = true;
return newInfo;
}
public bool IsReadOnly => _isReadOnly;
private void VerifyWritable()
{