IN: The pointer to a comma-separated list of fields for a compound datatype
H5LD_GET_DSET_TYPE_SIZE allows the user to find out the datatype size for the dataset associated withdset_id. If the parameterfieldsis NULL, this routine just returns the size of the dataset’s datatype. If the dataset has a compound datatype andfieldsis non-NULL, this routine returns the size of the datatype(s) for the selected fields specified infields. Note that ’,’ is the separator for the fields of a compound datatype while ’.’ (dot) is the separator for a nested field. Use a backslash ( \ ) to escape characters in field names that conflict with these two separators.