/// <summary>
/// Transliterate Unicode character to ASCII string.
/// </summary>
/// <param name="c">Character you want to transliterate into ASCII</param>
/// <param name="level">Level of transliteration.</param>
/// <returns>
/// Transliterated string.
/// </returns>
public static string Unidecode(this char c, UnidecoderLevel level = UnidecoderLevel.Ascii)
{
if (level == UnidecoderLevel.Off)
{
return(new String(c, 1));
}
if (c < 0x80)/*128*/
{
return(new string(c, 1));
}
else if (c < 161)
{
return(String.Empty);
}
else if (c < 256)
{
switch (level)
{
case UnidecoderLevel.Ansi:
return(new string(c, 1));
case UnidecoderLevel.AnsiPlus:
return(new string(c, 1));
}
}
else if (level == UnidecoderLevel.AnsiPlus && c == 306)
{
return("IJ");
}
else if (level == UnidecoderLevel.AnsiPlus && c == 307)
{
return("ij");
}
else if (level == UnidecoderLevel.AnsiPlus && c == 312)
{
return("k");
}
else if (level == UnidecoderLevel.AnsiPlus && c == 319)
{
return("L");
}
else if (level == UnidecoderLevel.AnsiPlus && c == 320)
{
return("l");
}
else if (level == UnidecoderLevel.AnsiPlus && c == 329)
{
return("'n");
}
else if (level == UnidecoderLevel.AnsiPlus && c == 330)
{
return("ng");
}
else if (level == UnidecoderLevel.AnsiPlus && c == 331)
{
return("NG");
}
else if (level == UnidecoderLevel.AnsiPlus && c == 383)
{
return("s");
}
else if (level == UnidecoderLevel.AnsiPlus && c < 384)
{
return(new string(c, 1));
}
else if (level == UnidecoderLevel.AnsiPlus && c == 393)
{
return(new string(c, 1));
}
// By default:
{
int high = c >> 8;
int low = c & 0xff;
string[] transliterations;
string result;
if (CharacterMap.TryGetValue(high, out transliterations))
{
result = transliterations[low];
}
else
{
result = "";
}
return(result);
}
}
/// <summary>
/// Transliterate Unicode string to ASCII string.
/// </summary>
/// <param name="input">String you want to transliterate into ASCII</param>
/// <param name="level">Level of transliteration.</param>
/// <returns>
/// Transliterated string.
/// </returns>
public static string Unidecode(this string input, UnidecoderLevel level = UnidecoderLevel.Ascii)
{
if (level == UnidecoderLevel.Off)
{
return(input);
}
else if (string.IsNullOrEmpty(input))
{
return(input);
}
else if (input.All(x => x < 0x80))
{
return(input);
}
// Unidecode result often can be at least two times longer than input string.
var sb = new StringBuilder(input.Length * 2);
if (level == UnidecoderLevel.Ascii)
{
foreach (char c in input)
{
if (c < 0x80)/*128*/
{
sb.Append(c);
}
else if (c < 161)
{
sb.Append("");
}
else
{
int high = c >> 8;
int low = c & 0xff;
string[] transliterations;
string result;
if (CharacterMap.TryGetValue(high, out transliterations))
{
result = transliterations[low];
}
else
{
result = "";
}
sb.Append(result);
}
}
}
else if (level == UnidecoderLevel.Ansi)
{
foreach (char c in input)
{
if (c < 0x80)/*128*/
{
sb.Append(c);
}
else if (c < 160)
{
sb.Append(unkn);
}
else if (c == 160)
{
sb.Append(" ");
}
else if (c < 256)
{
sb.Append(c);
}
else
{
int high = c >> 8;
int low = c & 0xff;
string[] transliterations;
string result;
if (CharacterMap.TryGetValue(high, out transliterations))
{
result = transliterations[low];
}
else
{
result = "";
}
sb.Append(result);
}
}
}
else if (level == UnidecoderLevel.AnsiPlus)
{
foreach (char c in input)
{
if (c < 0x80)/*128*/
{
sb.Append(c);
}
else if (c < 160)
{
sb.Append(unkn);
}
else if (c == 160)
{
sb.Append(" ");
}
else if (c < 256)
{
sb.Append(c);
}
else if (c == 306)
{
sb.Append("IJ");
}
else if (c == 307)
{
sb.Append("ij");
}
else if (c == 312)
{
sb.Append("k");
}
else if (c == 319)
{
sb.Append("L");
}
else if (c == 320)
{
sb.Append("l");
}
else if (c == 329)
{
sb.Append("'n");
}
else if (c == 330)
{
sb.Append("ng");
}
else if (c == 331)
{
sb.Append("NG");
}
else if (c == 383)
{
sb.Append("s");
}
else if (c < 384)
{
sb.Append(c);
}
else if (c == 393)
{
sb.Append(c);
}
else
{
int high = c >> 8;
int low = c & 0xff;
string[] transliterations;
string result;
if (CharacterMap.TryGetValue(high, out transliterations))
{
result = transliterations[low];
}
else
{
result = "";
}
sb.Append(result);
}
}
}
else
{
throw new ArgumentException("Unsupported level argument value.", "level");
}
return(sb.ToString());
}
