private static void OnAtomicReadFileRequest(BacnetClient sender, BacnetAddress adr, byte invoke_id, bool is_stream, BacnetObjectId object_id, int position, uint count, BacnetMaxSegments max_segments)
{
lock (m_lockObject)
{
try
{
if (object_id.Type != BacnetObjectTypes.OBJECT_FILE)
{
throw new Exception("File Reading on non file objects ... bah!");
}
else if (object_id.Instance != 0)
{
throw new Exception("Don't know this file");
}
//this is a test file for performance measuring
int filesize = m_storage.ReadPropertyValue(object_id, BacnetPropertyIds.PROP_FILE_SIZE); //test file is ~10mb
bool end_of_file = (position + count) >= filesize;
count = (uint)Math.Min(count, filesize - position);
int max_filebuffer_size = sender.GetFileBufferMaxSize();
if (count > max_filebuffer_size && max_segments > 0)
{
//create segmented message!!!
}
else
{
count = (uint)Math.Min(count, max_filebuffer_size); //trim
}
//fill file with bogus content
byte[] file_buffer = new byte[count];
byte[] bogus = new byte[] { (byte)'F', (byte)'I', (byte)'L', (byte)'L' };
for (int i = 0; i < count; i += bogus.Length)
{
Array.Copy(bogus, 0, file_buffer, i, Math.Min(bogus.Length, count - i));
}
//send
HandleSegmentationResponse(sender, adr, invoke_id, max_segments, (seg) =>
{
sender.ReadFileResponse(adr, invoke_id, seg, position, count, end_of_file, file_buffer);
});
}
catch (Exception)
{
sender.ErrorResponse(adr, BacnetConfirmedServices.SERVICE_CONFIRMED_ATOMIC_READ_FILE, invoke_id, BacnetErrorClasses.ERROR_CLASS_DEVICE, BacnetErrorCodes.ERROR_CODE_OTHER);
}
}
}
