#-------------------------------------------------------------
#
# parse_format('format',$isis_row);
#

use isis_sf;

sub parse_format {
	my $format = shift;
	my $row = shift;
	my $i = shift || 0;	# isis repeatable number
	my $codepage = shift || die;

	my $out;
	my $out_swish;

	my $prefix = "";
	if ($format =~ s/^([^\d]+)//) {
		$prefix = $1;
	}

	my $display;
	my $swish;

	while ($format) {
#print STDERR "\n#### $format";
		if ($format =~ s/^(\d\d\d)(\w?)//) {
			my $isis_tmp = isis_sf($row,$1,$2,$i);
			if ($isis_tmp) {
				$isis_tmp = $codepage->convert($isis_tmp) if ($codepage);
				$display .= $prefix . $isis_tmp;
				$swish .= $isis_tmp." ";
#print STDERR " == $isis_tmp";
			}
			$prefix = "";
		# this might be our local scpeciality -- fields 10 and 11
		# (as opposed to 010 and 011) so they are strictly listed
		# here
		} elsif ($format =~ s/^(1[01])//) {
			my $isis_tmp = isis_sf($row,$1,undef,$i);
			if ($isis_tmp) {
				$isis_tmp = $codepage->convert($isis_tmp) if ($codepage);
				$display .= $prefix . $isis_tmp;
				$swish .= $isis_tmp." ";
			}
			$prefix = "";
		} elsif ($format =~ s/^mfn//i) {
			$display .= $prefix . $row->{mfn};
			$prefix = "";
		} elsif ($format =~ s/^([^\d]+)(\d{0,3})/$2/) {
			$prefix .= $1 if ($display);
		} elsif ($format =~ s/^([^\d]+\d{0,2})//) {
			$prefix .= $1 if ($display);
		} elsif ($format =~ s/^(\d{1,2})//) {
			$prefix .= $1 if ($display);
		} else {
			print STDERR "unparsed format: $format\n";
			$prefix .= $format;
			$format = "";
		}
	}
	# add suffix
	$display .= $prefix if ($display);

	return ($swish,$display);
}

#-------------------------------------------------------------
1;
