my $colsize = $row->{cell} && $row->{cell}->{colsize} || 1;
my $coldigits = ceil(log($colsize * $cols) / log(16)); # uniform length of hexadecimal header
my $rowdiv = 16 ** $coldigits; # divider of row headers
my $colsize = $row->{cell} && $row->{cell}->{colsize} || 1;
my $coldigits = ceil(log($colsize * $cols) / log(16)); # uniform length of hexadecimal header
my $rowdiv = 16 ** $coldigits; # divider of row headers