Long2IntQuick.java
966 Bytes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
package is2.data;
/**
* @author Bernd Bohnet, 01.09.2009
*
* Maps for the Hash Kernel the long values to the int values.
*/
final public class Long2IntQuick implements Long2IntInterface {
/** Integer counter for long2int */
final private int size;
public Long2IntQuick() {
size = 0x07ffffff;
}
public Long2IntQuick(int s) {
size = s;
}
/*
* (non-Javadoc)
*
* @see is2.sp09k9992.Long2IntIterface#size()
*/
@Override
public int size() {
return size;
}
/*
* (non-Javadoc)
*
* @see is2.sp09k9992.Long2IntIterface#start() has no meaning for this
* implementation
*/
/*
* (non-Javadoc)
*
* @see is2.sp09k9992.Long2IntIterface#l2i(long)
*/
@Override
final public int l2i(long r) {
long l = (r >> 16) & 0xfffffffffffff000L;
r ^= l;
r ^= l = (l >> 12) & 0xffffffffffff0000L;
r ^= l = (l >> 8) & 0xfffffffffffc0000L;
return (int) (r % size);
}
}