/// <summary>
/// Remove special private use subtag sequence identified by "lvariant"
/// and return the rest. Only used by LocaleExtensions.
/// </summary>
internal static string RemovePrivateuseVariant(string privuseVal)
{
StringTokenEnumerator itr = new StringTokenEnumerator(privuseVal, LanguageTag.Separator);
// Note: privateuse value "abc-lvariant" is unchanged
// because no subtags after "lvariant".
int prefixStart = -1;
bool sawPrivuseVar = false;
while (itr.MoveNext())
{
if (prefixStart != -1)
{
// Note: privateuse value "abc-lvariant" is unchanged
// because no subtags after "lvariant".
sawPrivuseVar = true;
break;
}
if (AsciiUtil.CaseIgnoreMatch(itr.Current, LanguageTag.PrivateUse_Variant_Prefix))
{
prefixStart = itr.CurrentStart;
}
}
if (!sawPrivuseVar)
{
return(privuseVal);
}
Debug.Assert(prefixStart == 0 || prefixStart > 1);
return((prefixStart == 0) ? null : privuseVal.Substring(0, prefixStart - 1)); // ICU4N: Checked 2nd parameter
}
public override bool Equals(object obj)
{
if (this == obj)
{
return(true);
}
if (!(obj is CaseInsensitiveString))
{
return(false);
}
return(AsciiUtil.CaseIgnoreMatch(_s, ((CaseInsensitiveString)obj).Value));
}
public static bool IsExtensionSingleton(string s)
{
// singleton = DIGIT ; 0 - 9
// / %x41-57 ; A - W
// / %x59-5A ; Y - Z
// / %x61-77 ; a - w
// / %x79-7A ; y - z
return((s.Length == 1) &&
AsciiUtil.IsAlphaString(s) &&
!AsciiUtil.CaseIgnoreMatch(PRIVATEUSE, s));
}
public override bool Equals(Object o)
{
if (this == o)
{
return(true);
}
if (o is CaseInsensitiveKey)
{
return(AsciiUtil.CaseIgnoreMatch(_key, ((CaseInsensitiveKey)o)._key));
}
return(false);
}
public override bool Equals(object o)
{
if (ReferenceEquals(this, o))
{
return(true);
}
if (o is AsciiCaseInsensitiveKey other)
{
return(AsciiUtil.CaseIgnoreMatch(_key, other._key));
}
return(false);
}
public override bool Equals(object obj)
{
if (ReferenceEquals(this, obj))
{
return(true);
}
if (obj is CaseInsensitiveString other)
{
return(AsciiUtil.CaseIgnoreMatch(_s, other.Value));
}
return(false);
}
public override bool Equals(object obj)
{
if (JDKIMPL)
{
return((this == obj) ||
(obj is Key) &&
AsciiUtil.CaseIgnoreMatch(((Key)obj)._lang, this._lang) &&
AsciiUtil.CaseIgnoreMatch(((Key)obj)._scrt, this._scrt) &&
AsciiUtil.CaseIgnoreMatch(((Key)obj)._regn, this._regn) &&
((Key)obj)._vart.Equals(_vart)); // variant is case sensitive in JDK!
}
return((this == obj) ||
(obj is Key) &&
AsciiUtil.CaseIgnoreMatch(((Key)obj)._lang, this._lang) &&
AsciiUtil.CaseIgnoreMatch(((Key)obj)._scrt, this._scrt) &&
AsciiUtil.CaseIgnoreMatch(((Key)obj)._regn, this._regn) &&
AsciiUtil.CaseIgnoreMatch(((Key)obj)._vart, this._vart));
}
public BaseLocale GetBaseLocale()
{
string language = _language;
string script = _script;
string region = _region;
string variant = _variant;
// Special private use subtag sequence identified by "lvariant" will be
// interpreted as Java variant.
if (_extensions != null)
{
string privuse;
if (_extensions.TryGetValue(PRIVUSE_KEY, out privuse) && privuse != null)
{
StringTokenEnumerator itr = new StringTokenEnumerator(privuse, LanguageTag.Separator);
bool sawPrefix = false;
int privVarStart = -1;
while (itr.MoveNext())
{
if (sawPrefix)
{
privVarStart = itr.CurrentStart;
break;
}
if (AsciiUtil.CaseIgnoreMatch(itr.Current, LanguageTag.PrivateUse_Variant_Prefix))
{
sawPrefix = true;
}
}
if (privVarStart != -1)
{
StringBuilder sb = new StringBuilder(variant);
if (sb.Length != 0)
{
sb.Append(BaseLocale.Separator);
}
sb.Append(privuse.Substring(privVarStart).Replace(LanguageTag.Separator, BaseLocale.Separator));
variant = sb.ToString();
}
}
}
return(BaseLocale.GetInstance(language, script, region, variant));
}
public static BaseLocale GetInstance(string language, string script, string region, string variant)
{
if (JDKIMPL)
{
// JDK uses deprecated ISO639.1 language codes for he, yi and id
if (AsciiUtil.CaseIgnoreMatch(language, "he"))
{
language = "iw";
}
else if (AsciiUtil.CaseIgnoreMatch(language, "yi"))
{
language = "ji";
}
else if (AsciiUtil.CaseIgnoreMatch(language, "id"))
{
language = "in";
}
}
Key key = new Key(language, script, region, variant);
BaseLocale baseLocale = CACHE.Get(key);
return(baseLocale);
}
public static bool IsPrivateusePrefixChar(char c)
{
return(AsciiUtil.CaseIgnoreMatch(PRIVATEUSE, new string(new char[] { c })));
}
public static bool IsPrivateusePrefix(string s)
{
// privateuse = "x" 1*("-" (1*8alphanum))
return((s.Length == 1) &&
AsciiUtil.CaseIgnoreMatch(PRIVATEUSE, s));
}
