+sub find
+{
+ return 0 unless $_[0];
+ return exists $d{$_[0]} ? $d{$_[0]} : 0;
+}
+
+sub add
+{
+ my $s = shift;
+ my $t = shift || $main::systime + $default;
+ return unless $s;
+
+ $d{$s} = $t;
+ dbg("DXDupe::add key: $s time: " . ztime($t)) if isdbg('dxdupe');
+}
+