public string HiraganaToKatakana(string hiragana)
{
if (JapaneseKanaClassifier.IsHiragana(hiragana))
{
StringBuilder resultBuilder = new StringBuilder(hiragana.Length);
foreach (char character in hiragana)
{
resultBuilder.Append((char)(character - (0x3040 - 0x30A0)));
}
return(resultBuilder.ToString());
}
throw new FormatException("The given string is not valid hiragana.");
}
public string RomajiToHiragana(string romaji)
{
string result = KatakanaToHiragana(RomajiToKatakana(romaji));
// Some last fixes
result = result.Replace("くぁ", "くゎ"); // kwa
result = result.Replace("どぅ", "づ"); // du
result = result.Replace("ぐぁ", "ぐゎ"); // kwa
result = result.Replace("すぃ", "し"); // si
if (!JapaneseKanaClassifier.IsHiragana(result))
{
throw new FormatException("The argument is not valid japanese romaji (" + romaji + ")");
}
return(result);
}
public string KatakanaToHiragana(string katakana)
{
if (JapaneseKanaClassifier.IsHalfwidthKatakana(katakana))
{
katakana = katakana.Normalize(NormalizationForm.FormKC);
}
if (JapaneseKanaClassifier.IsFullwidthKatakana(katakana))
{
StringBuilder resultBuilder = new StringBuilder(katakana.Length);
foreach (char character in katakana)
{
resultBuilder.Append((char)(character + (0x3040 - 0x30A0)));
}
return(resultBuilder.ToString());
}
throw new FormatException("The given string is not valid katakana.");
}
