public int next()

in commons-rng-core/src/main/java/org/apache/commons/rng/core/source32/Well44497a.java [58:82]

• 20 lines of code
• 2 McCabe index (conditional complexity)

    public int next() {
        final int indexRm1 = TABLE.getIndexPred(index);
        final int indexRm2 = TABLE.getIndexPred2(index);

        final int v0 = v[index];
        final int vM1 = v[TABLE.getIndexM1(index)];
        final int vM2 = v[TABLE.getIndexM2(index)];
        final int vM3 = v[TABLE.getIndexM3(index)];

        // the values below include the errata of the original article
        final int z0 = (0xFFFF8000 & v[indexRm1]) ^ (0x00007FFF & v[indexRm2]);
        final int z1 = (v0 ^ (v0 << 24)) ^ (vM1 ^ (vM1 >>> 30));
        final int z2 = (vM2 ^ (vM2 << 10)) ^ (vM3 << 26);
        final int z3 = z1 ^ z2;
        final int z2Prime = ((z2 << 9) ^ (z2 >>> 23)) & 0xfbffffff;
        final int z2Second = ((z2 & 0x00020000) == 0) ? z2Prime : (z2Prime ^ 0xb729fcec);
        final int z4 = z0 ^ (z1 ^ (z1 >>> 20)) ^ z2Second ^ z3;

        v[index] = z3;
        v[indexRm1] = z4;
        v[indexRm2] &= 0xFFFF8000;
        index = indexRm1;

        return z4;
    }