public static bool IsStandardIso3166Region(string regionCodeToCheck)
{
return(ValidIso3166Regions.Any(
code => regionCodeToCheck.Equals(code.Subtag, StringComparison.OrdinalIgnoreCase)
));
}
private static void LoadIanaSubtags()
{
// JohnT: can't find anywhere else to document this, so here goes: TwoToThreeMap is a file adapted from
// FieldWorks Ethnologue\Data\iso-639-3_20080804.tab, by discarding all but the first column (3-letter
// ethnologue codes) and the fourth (two-letter IANA codes), and all the rows where the fourth column is empty.
// I then swapped the columns. So, in this resource, the string before the tab in each line is a 2-letter
// Iana code, and the string after it is the one we want to return as the corresponding ISO3Code.
// The following block of code assembles these lines into a map we can use to fill this slot properly
// when building the main table.
var TwoToThreeMap = new Dictionary <string, string>();
string[] encodingPairs = LanguageRegistryResources.TwoToThreeCodes.Replace("\r\n", "\n").Split(new[] { "\n" }, StringSplitOptions.RemoveEmptyEntries);
foreach (string pair in encodingPairs)
{
var items = pair.Split('\t');
if (items.Length != 2)
{
continue;
}
TwoToThreeMap[items[0]] = items[1];
}
string[] ianaSubtagsAsStrings = LanguageRegistryResources.ianaSubtagRegistry.Split(new[] { "%%" }, StringSplitOptions.None);
foreach (string ianaSubtagAsString in ianaSubtagsAsStrings)
{
string[] subTagComponents = ianaSubtagAsString.Replace("\r\n", "\n").Split(new[] { "\n" }, StringSplitOptions.RemoveEmptyEntries);
if (subTagComponents[0].Contains("File-Date"))
{
continue; //This is the first line of the file.
}
CheckIfIanaSubtagFromFileHasExpectedForm(subTagComponents);
string type = subTagComponents[0].Split(' ')[1];
string subtag = subTagComponents[1].Split(' ')[1];
string description = SubTagComponentDescription(subTagComponents[2]);
if (subtag.Contains("..")) // do not add private use subtags to the list
{
continue;
}
/* Note: currently we are only using the first "Description:" line in each entry.
* A few script entries contain multiple Description: lines, as in the example below:
*
* Type: script
* Subtag: Deva
* Description: Devanagari
* Description: Nagari
* Added: 2005-10-16
*
* In the future it may be necessary to build a separate iana script entry collection
* that contains duplicate script codes, for the purposes of including all possible
* script Descriptions.
*/
switch (type)
{
case "language":
string iso3Code;
if (!TwoToThreeMap.TryGetValue(subtag, out iso3Code))
{
iso3Code = String.Empty;
}
ValidIso639LanguageCodes.Add(
new Iso639LanguageCode(subtag, description, iso3Code)
);
break;
case "script":
ValidIso15924Scripts.Add(
new Iso15924Script(description, subtag)
);
break;
case "region":
ValidIso3166Regions.Add(
new IanaSubtag(type, subtag, description)
);
break;
case "variant":
ValidRegisteredVariants.Add(
new IanaVariantSubtag(type, subtag, description, GetVariantPrefixes(subTagComponents))
);
break;
}
}
ValidIso639LanguageCodes.Sort(Iso639LanguageCode.CompareByName);
ValidIso15924Scripts.Sort(Iso15924Script.CompareScriptOptions);
ValidIso3166Regions.Sort(IanaSubtag.CompareByDescription);
ValidRegisteredVariants.Sort(IanaSubtag.CompareByDescription);
// Add Unlisted Language at the end
ValidIso639LanguageCodes.Insert(ValidIso639LanguageCodes.Count, new Iso639LanguageCode("qaa", "Language Not Listed", String.Empty));
// To help people find Latin as a script tag
ValidIso15924Scripts.Insert(0, new Iso15924Script("Roman (Latin)", "Latn"));
}
