private async Task <bool> FindNextDelimiter(Func <DataType, object, DataAdditionResult> dataAction)
{
var dataAdditionResult = new DataAdditionResult(DataType.ASCIILine, -1);
while (true)
{
if (dataAdditionResult.NextDataType == DataType.ASCIILine)
{
string line;
if ((line = await ReadASCIILineAsync()) == null)
{
return(false);
}
if (line.StartsWith(DataSetDelimiter, StringComparison.InvariantCultureIgnoreCase))
{
return(true);
}
dataAdditionResult = dataAction(dataAdditionResult.NextDataType, line);
continue;
}
if (dataAdditionResult.NextDataType == DataType.BinaryData)
{
dataAdditionResult = await ProcessBinaryData(dataAdditionResult, dataAction);
continue;
}
return(false);
}
}
private async Task <DataAdditionResult> ProcessBinaryData(DataAdditionResult previousDataAdditionResult, Func <DataType, object, DataAdditionResult> dataAction)
{
var byteBuffer = new byte[previousDataAdditionResult.NextDataLength];
if (await ReadBytesAsync(byteBuffer, 0, byteBuffer.Length) < byteBuffer.Length)
{
throw new InvalidDataException("Stream is ended before all bytes could be read.");
}
return(dataAction(previousDataAdditionResult.NextDataType, byteBuffer));
}
