{
                  // loop while marker is not EOI and not the data segment
                  while (true) {
                        Marker marker = ReadSegmentMarker ();

                        // we stop parsing when the end of file (EOI) or the begin of the
                        // data segment is reached (SOS)
                        // the second case is a trade-off between tolerant and fast parsing
                        if (marker == Marker.EOI || marker == Marker.SOS)
                              break;

                        long position = Tell;
                        ushort segment_size = ReadSegmentSize ();

                        // segment size contains 2 bytes of the size itself, so the
                        // pure data size is this (and the cast is save)
                        ushort data_size = (ushort) (segment_size - 2);

                        switch (marker) {
                        case Marker.APP0: // possibly JFIF header
                              ReadJFIFHeader (data_size);
                              break;

                        case Marker.APP1: // possibly Exif or Xmp data found
                              ReadAPP1Segment (data_size);
                              break;

                        case Marker.COM:  // Comment segment found
                              ReadCOMSegment (data_size);
                              break;

                        case Marker.SOF0:
                        case Marker.SOF1:
                        case Marker.SOF2:
                        case Marker.SOF3:
                        case Marker.SOF9:
                        case Marker.SOF10:
                        case Marker.SOF11:
                              ReadSOFSegment (data_size, marker);
                              break;

                        case Marker.DQT:  // Quantization table(s), use it to guess quality
                              ReadDQTSegment (data_size);
                              break;
                        }

                        // set position to next segment and start with next segment marker
                        Seek (position + segment_size, SeekOrigin.Begin);
                  }
            }