package org.klomp.snark.dht;
/*
* From zzzot, modded and relicensed to GPLv2
*/
import java.io.Serializable;
import java.util.Comparator;
import net.i2p.crypto.SHA1Hash;
import net.i2p.data.DataHelper;
/**
* Closest to a InfoHash or NID key.
* Use for NodeInfos.
*
* @since 0.9.2
* @author zzz
*/
class NodeInfoComparator implements Comparator<NodeInfo>, Serializable {
private final byte[] _base;
public NodeInfoComparator(SHA1Hash h) {
_base = h.getData();
}
public int compare(NodeInfo lhs, NodeInfo rhs) {
byte lhsDelta[] = DataHelper.xor(lhs.getNID().getData(), _base);
byte rhsDelta[] = DataHelper.xor(rhs.getNID().getData(), _base);
return DataHelper.compareTo(lhsDelta, rhsDelta);
}
}