+sub simplifylangs($)
+{
+ my ($rencoding) = @_;
+ my $base = "";
+ my $enc = "";
+ my $differ = 0;
+ my @klist = ();
+ my @klist2 = ();
+ for my $k (reverse sort keys %{$rencoding}) {
+ my @tag = split('_', $k);
+ if ($tag[0] eq $base) {
+ push(@klist, $k);
+ if ($rencoding->{$k} ne $enc) {
+ $differ = 1;
+ }
+ }
+ else {
+ # new base, check that old base was OK
+ if ($base ne "") {
+ if ($differ == 0) {
+ $rencoding->{$base} = $enc;
+ push(@klist2, @klist);
+ }
+ }
+ @klist = ($k);
+ $base = $tag[0];
+ $enc = $rencoding->{$k};
+ $differ = 0;
+ }
+ }
+ if ($base ne "") {
+ # close handling for last entry too
+ if ($differ == 0) {
+ $rencoding->{$base} = $enc;
+ push(@klist2, @klist);
+ }
+ }
+ for my $k (@klist2) {
+ delete($rencoding->{$k});
+ }
+}
+