tdlight-team/common-utils
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Update LFSR.java

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This commit is contained in:
Andrea Cavalli 2020-06-27 15:17:22 +02:00
parent 646753d788
commit 6e2c0feddf
1 changed files with 10 additions and 2 deletions
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12
src/main/java/org/warp/commonutils/random/LFSR.java
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@ -3,6 +3,7 @@ package org.warp.commonutils.random;
import java.math.BigInteger; import java.math.BigInteger;
import java.util.Iterator; import java.util.Iterator;
import java.util.Random; import java.util.Random;
import org.jetbrains.annotations.NotNull;
/** /**
* Linear feedback shift register * Linear feedback shift register
@ -58,12 +59,13 @@ public class LFSR implements Iterable<BigInteger> {
this.taps = primitivePoly.shiftRight(1); this.taps = primitivePoly.shiftRight(1);
} }
@NotNull
@Override @Override
public Iterator<BigInteger> iterator() { public LFSRIterator iterator() {
return new LFSRIterator(start); return new LFSRIterator(start);
} }
private class LFSRIterator implements Iterator<BigInteger> { public class LFSRIterator implements Iterator<BigInteger> {
// The last one we returned. // The last one we returned.
private BigInteger last = null; private BigInteger last = null;
@ -110,6 +112,12 @@ public class LFSR implements Iterable<BigInteger> {
return last; return last;
} }
public BigInteger next(BigInteger last) {
this.last = last;
next = null;
return next();
}
@Override @Override
public void remove() { public void remove() {
throw new UnsupportedOperationException("Not supported."); throw new UnsupportedOperationException("Not supported.");