public override byte[] EncodeValue(ScalarValue v)
{
if (v == ScalarValue.Null)
{
return(NullValueEncoding);
}
var buffer = new MemoryStream();
var value = (DecimalValue)v;
try
{
if (Math.Abs(value.Exponent) > 63)
{
Global.ErrorHandler.OnError(null, RepError.LargeDecimal, "");
}
byte[] tmp = NullableInteger.Encode(new IntegerValue(value.Exponent));
buffer.Write(tmp, 0, tmp.Length);
tmp = Integer.Encode(new LongValue(value.Mantissa));
buffer.Write(tmp, 0, tmp.Length);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
return(buffer.ToArray());
}
public override ScalarValue Decode(Stream inStream)
{
ScalarValue subtractionLength = NullableInteger.Decode(inStream);
if (subtractionLength == null)
{
return(null);
}
ScalarValue difference = Ascii.Decode(inStream);
return(new TwinValue(subtractionLength, difference));
}
public override ScalarValue Decode(Stream inStream)
{
ScalarValue exp = NullableInteger.Decode(inStream);
if ((exp == null) || exp.IsNull)
{
return(null);
}
int exponent = exp.ToInt();
long mantissa = Integer.Decode(inStream).ToLong();
var decimalValue = new DecimalValue(mantissa, exponent);
return(decimalValue);
}
public override byte[] EncodeValue(ScalarValue value)
{
if (value.IsNull)
{
return(NullValueEncoding);
}
var diff = (TwinValue)value;
byte[] subtractionLength = NullableInteger.Encode(diff.First);
byte[] difference = Ascii.Encode(diff.Second);
var encoded = new byte[subtractionLength.Length + difference.Length];
Array.Copy(subtractionLength, 0, encoded, 0, subtractionLength.Length);
Array.Copy(difference, 0, encoded, subtractionLength.Length, difference.Length);
return(encoded);
}