public void ConvertBack(object source, byte[] destination, ushort position, ushort length, object parameter)
{
if (source == null)
{
throw new ArgumentNullException();
}
var scale = MathExtentions.PowerOf10((parameter as int?) ?? 0);
switch (length)
{
case 1:
destination[position] = (byte)(System.Convert.ToDecimal(source) * scale);
return;
case 2:
Array.Copy(BitConverter.GetBytes((ushort)(System.Convert.ToDecimal(source) * scale)), 0, destination, position, length);
return;
case 4:
Array.Copy(BitConverter.GetBytes((uint)(System.Convert.ToDecimal(source) * scale)), 0, destination, position, length);
return;
case 8:
Array.Copy(BitConverter.GetBytes((ulong)(System.Convert.ToDecimal(source) * scale)), 0, destination, position, length);
return;
default:
throw new ArgumentOutOfRangeException();
}
}
public void ConvertBack(object source, byte[] destination, ushort position, ushort length, object parameter = null)
{
if (source == null)
{
throw new ArgumentNullException();
}
var signible = (byte)0x0f;
var scale = MathExtentions.PowerOf10((parameter as int?) ?? 0);
var value = Math.Truncate(System.Convert.ToDecimal(source) * scale);
if (value < 0)
{
value = -value;
signible = (byte)0x0d;
}
var valueString = value.ToString();
if (valueString.Length > length * 2 - 1)
{
throw new ArgumentException();
}
var zerofillCount = length * 2 - 1 - valueString.Length;
if (zerofillCount != 0)
{
valueString = new string('0', zerofillCount) + valueString;
}
for (var i = 0; i < length; i++)
{
var digit = 0;
digit |= byte.Parse(valueString.Substring(i * 2, 1)) << 4;
if (i == length - 1)
{
digit |= signible;
}
else
{
digit |= byte.Parse(valueString.Substring(i * 2, 1));
}
destination[position + i] = (byte)digit;
}
}
public object Convert(byte[] source, ushort position, ushort length, object parameter)
{
var scale = MathExtentions.PowerOf10((parameter as int?) ?? 0);
switch (length)
{
case 1:
return(source[position] / scale);
case 2:
return(BitConverter.ToUInt16(source, position) / scale);
case 4:
return(BitConverter.ToUInt32(source, position) / scale);
case 8:
return(BitConverter.ToUInt64(source, position) / scale);
default:
throw new ArgumentOutOfRangeException();
}
}
public object Convert(byte[] source, ushort position, ushort length, object parameter)
{
var scale = MathExtentions.PowerOf10((parameter as int?) ?? 0);
var result = 0m;
for (var i = 0; i < length; i++)
{
if (i == length - 1)
{
result += 1m * (source[position + i] >> 4);
if ((source[position + i] & 0x0f) == 0x0d)
{
result = -result;
}
}
else
{
result += MathExtentions.PowerOf10((length - i) * 2 - 2) * (source[position + i] >> 4);
result += MathExtentions.PowerOf10((length - i) * 2 - 3) * (source[position + i] & 0x0f);
}
}
return(result / scale);
}