+sub version_to_num($) {
+ my $str = shift;
+ my $num = 0;
+
+ if (defined($str) && $str =~ /^\d+(?:\.\d+)+$/)
+ {
+ my @n = (split(/\./, $str), 0, 0, 0, 0);
+ $num = ($n[0] << 24) | ($n[1] << 16) | ($n[2] << 8) | $n[3];
+ }
+
+ return $num;
+}
+
+sub version_filter_list(@) {
+ my $cmpver = version_to_num(shift @_);
+ my @items;
+
+ foreach my $item (@_)
+ {
+ if ($item =~ s/@(lt|le|gt|ge|eq|ne)(\d+(?:\.\d+)+)\b//)
+ {
+ my $op = $1;
+ my $symver = version_to_num($2);
+
+ if ($symver > 0 && $cmpver > 0)
+ {
+ next unless (($op eq 'lt' && $cmpver < $symver) ||
+ ($op eq 'le' && $cmpver <= $symver) ||
+ ($op eq 'gt' && $cmpver > $symver) ||
+ ($op eq 'ge' && $cmpver >= $symver) ||
+ ($op eq 'eq' && $cmpver == $symver) ||
+ ($op eq 'ne' && $cmpver != $symver));
+ }
+ }
+
+ push @items, $item;
+ }
+
+ return @items;
+}
+