/// <summary>
/// Encodes a number in the Base64 VLQ format
/// </summary>
/// <param name="value">The value to be encoded</param>
/// <returns>The value encoded as a Base64 VLQ string</returns>
public static string Encode(int value)
{
var encoded = new List <char>();
var vlq = toVLQ(value);
do
{
var digit = vlq & VLQ_BASE_MASK;
vlq = vlq >> VLQ_BASE_SHIFT;
if (vlq > 0)
{
digit |= VLQ_CONTINUATION_BIT;
}
encoded.Add(Base64Converter.Encode(digit));
}while (vlq > 0);
return(string.Concat(encoded));
}
public static DecodeResult Decode(string encoded)
{
int result = 0;
int shift = 0;
int charactersRead = 0;
foreach (var character in encoded)
{
charactersRead += 1;
var digit = Base64Converter.Decode(character);
var continuation = (digit & VLQ_CONTINUATION_BIT) != 0;
digit &= VLQ_BASE_MASK;
result += (digit << shift);
shift += VLQ_BASE_SHIFT;
if (!continuation)
{
break;
}
}
return(new DecodeResult(fromVLQ(result), charactersRead));
}