public static Rune FromUtf16(byte[] array, ref int index, ByteOrder endianness = ByteOrder.LittleEndian)
{
var decoder = new Utf16.ByteDecoder(endianness);
if (index + 2 > array.Length)
{
throw new ArgumentOutOfRangeException("index", "Need at least 2 bytes to process Utf16");
}
decoder.Process(array[index++]);
var result = decoder.Process(array[index++]);
if (result == null)
{
if (index + 2 > array.Length)
{
throw new ArgumentOutOfRangeException("index", "Need 4 bytes to process Utf16 surrogate pair");
}
decoder.Process(array[index++]);
result = decoder.Process(array[index++]);
if (result == null)
{
throw new RuneException(Utf16.MissingTrailingSurrogateMessage());
}
}
return(new Rune(result.GetValueOrDefault()));
}
// byte.Utf16... -> Rune
public static IEnumerable <Rune> AsUtf16Runes(this IEnumerable <byte> bytes, ByteOrder endianness = ByteOrder.LittleEndian)
{
var decoder = new Utf16.ByteDecoder(endianness);
return(DecodeValues(bytes, decoder, "Ill-formed Utf16."));
}
