private static HexString BytesToHex(IReadOnlyList <byte> bytes)
{
var hexDigits = new HexDigit[bytes.Count << 1];
for (var i = 0; i < bytes.Count; ++i)
{
var hexByte = bytes[i];
var firstNibble = (byte)(hexByte & 0x0f);
var secondNibble = (byte)(hexByte >> 4);
var index = i * 2;
hexDigits[index] = new HexDigit(secondNibble);
hexDigits[index + 1] = new HexDigit(firstNibble);
}
return(new HexString(hexDigits));
}
public HexString(string hex)
{
_hex = hex.ToLower();
_digits = new HexDigit[_hex.Length];
if (string.IsNullOrEmpty(_hex) || (_hex.Length & 1) != 0)
{
throw new InvalidHexStringException();
}
for (var i = 0; i < _hex.Length; ++i)
{
try
{
_digits[i] = new HexDigit(_hex[i]);
}
catch (InvalidHexDigitException e)
{
throw new InvalidHexStringException(e);
}
}
}
