+sub range_step ($$) {
+ my ($ibx, $range_csv) = @_;
+ my ($beg, $end, $range);
+ if ($$range_csv =~ s/\A([^,]+),//) {
+ $range = $1;
+ } else {
+ $range = $$range_csv;
+ $$range_csv = undef;
+ }
+ if ($range =~ /\A([0-9]+):([0-9]+)\z/) {
+ ($beg, $end) = ($1, $2);
+ } elsif ($range =~ /\A([0-9]+):\*\z/) {
+ ($beg, $end) = ($1, $ibx->mm->max // 0);
+ } elsif ($range =~ /\A[0-9]+\z/) {
+ $beg = $end = $range;
+ } else {
+ return 'BAD fetch range';
+ }
+ [ $beg, $end, $$range_csv ];
+}
+
+sub refill_range ($$$) {
+ my ($ibx, $msgs, $range_info) = @_;
+ my ($beg, $end, $range_csv) = @$range_info;
+ if (scalar(@$msgs = @{$ibx->over->query_xover($beg, $end)})) {
+ $range_info->[0] = $msgs->[-1]->{num} + 1;
+ return;
+ }
+ return 'OK Fetch done' if !$range_csv;
+ my $next_range = range_step($ibx, \$range_csv);
+ return $next_range if !ref($next_range); # error
+ @$range_info = @$next_range;
+ undef; # keep looping
+}
+