+
+ Dimension const & d = row.dimension();
+ char_type const b[] = { row.sel_beg, row.sel_end,
+ row.begin_margin_sel, row.end_margin_sel, d.wid, d.asc, d.des};
+ // Each of the variable to process is 4 bytes: 4x7 = 28
+ crc.process_bytes(b, 28);
+
+ return crc.checksum();