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 14:34:09 +02:00
parent ee747afaac
commit 646753d788
1 changed files with 6 additions and 2 deletions
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src/main/java/org/warp/commonutils/random/LFSR.java
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@ -35,7 +35,7 @@ public class LFSR implements Iterable<BigInteger> {
return random(50, Math.abs(random.nextInt())); return random(50, Math.abs(random.nextInt()));
} }
public static LFSR random(int bitsSize, long startNumber) { public static BigInteger randomPrimitive(int bitsSize) {
// Build the BigInteger. // Build the BigInteger.
BigInteger primitive = BigInteger.ZERO; BigInteger primitive = BigInteger.ZERO;
for (int bitNumber = 0; bitNumber <= bitsSize; bitNumber++) { for (int bitNumber = 0; bitNumber <= bitsSize; bitNumber++) {
@ -43,7 +43,11 @@ public class LFSR implements Iterable<BigInteger> {
primitive = primitive.or(BigInteger.ONE.shiftLeft(bitNumber)); primitive = primitive.or(BigInteger.ONE.shiftLeft(bitNumber));
} }
} }
return new LFSR(primitive, BigInteger.valueOf(startNumber)); return primitive;
}
public static LFSR random(int bitsSize, long startNumber) {
return new LFSR(randomPrimitive(bitsSize), BigInteger.valueOf(startNumber));
} }
// The poly must be primitive to span the full sequence. // The poly must be primitive to span the full sequence.