org.bouncycastle.util.Integers.java Source code

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Here is the source code for org.bouncycastle.util.Integers.java

Source

package org.bouncycastle.util;

public class Integers {
    public static int numberOfLeadingZeros(int i) {
        if (i <= 0) {
            return (~i >>> (31 - 5)) & (1 << 5);
        }

        int n = 1;
        if (0 == (i >>> 16)) {
            n += 16;
            i <<= 16;
        }
        if (0 == (i >>> 24)) {
            n += 8;
            i <<= 8;
        }
        if (0 == (i >>> 28)) {
            n += 4;
            i <<= 4;
        }
        if (0 == (i >>> 30)) {
            n += 2;
            i <<= 2;
        }
        n -= (i >>> 31);
        return n;
    }

    public static int rotateLeft(int i, int distance) {
        return (i << distance) ^ (i >>> -distance);
    }

    public static int rotateRight(int i, int distance) {
        return (i >>> distance) ^ (i << -distance);
    }

    public static Integer valueOf(int value) {
        return new Integer(value);
    }
}