protected override int OnMarshalParameter(int i, RpcMethodParameterCollection inParameters, IList <IDataType> inParameterTypes, object[] parameterValues, byte[] buffer, int offset)
{
ITcAdsDataType type = (ITcAdsDataType)inParameterTypes[i];
object val = parameterValues[i];
AdsDatatypeId dataTypeId = type.DataTypeId;
int num = 0;
if (PrimitiveTypeConverter.CanMarshal(type.Category))
{
byte[] data = null;
PrimitiveTypeConverter.Marshal(dataTypeId, val, out data);
num = copyHelper(buffer, offset, data);
}
else
{
if (type.Category != DataTypeCategory.String)
{
throw new MarshalException($"Cannot marshal complex type '{type.Name}'");
}
int length = -1;
bool isUnicode = false;
DataTypeStringParser.TryParseString(type.Name, out length, out isUnicode);
string str = (string)val;
byte[] source = null;
PlcStringConverter converter = isUnicode ? PlcStringConverter.UnicodeVariableLength : PlcStringConverter.DefaultVariableLength;
if (converter.MarshalSize(str) > type.ByteSize)
{
throw new MarshalException("String size mismatch");
}
source = converter.Marshal(str);
num = copyHelper(buffer, offset, source);
}
return(num);
}