+ if (/^$seq: (.*)/) {
+ my @parts;
+ my @result;
+ my $done = 0;
+ for my $part (split(' ', $1)) {
+ if (not $done) {
+ my ($st, $en) = split('-', $part);
+ if ((defined($en) and ($msgnum >= $st and $msgnum <= $en))
+ or $msgnum == $st) {
+ # It's already there.
+ $done = 1;
+ }
+ if (defined($en)) {
+ if ($st - 1 == $msgnum) {
+ $part = "$msgnum-$en";
+ $done = 1;
+ } elsif ($en + 1 == $msgnum) {
+ $part = "$st-$msgnum";
+ $done = 1;
+ }
+ } else {
+ if ($part - 1 == $msgnum) {
+ $part = "$msgnum-$part";
+ $done = 1;
+ } elsif ($part + 1 == $msgnum) {
+ $part = "$part-$msgnum";
+ $done = 1;
+ }
+ }
+ }
+ push(@result, $part);
+ }
+ if (not $done) {
+ push(@result, $msgnum);
+ }
+ print($fh "$seq: ", join(' ', @result), "\n");