public void update()

in src/main/java/org/apache/commons/codec/digest/PureJavaCrc32C.java [599:643]
36 lines of code
9 McCabe index (conditional complexity)

    public void update(final byte[] b, int off, int len) {
        int localCrc = crc;
        while (len > 7) {
            final int c0 = (b[off + 0] ^ localCrc) & 0xff;
            final int c1 = (b[off + 1] ^ (localCrc >>>= 8)) & 0xff;
            final int c2 = (b[off + 2] ^ (localCrc >>>= 8)) & 0xff;
            final int c3 = (b[off + 3] ^ (localCrc >>>= 8)) & 0xff;
            localCrc = T[T8_7_START + c0] ^ T[T8_6_START + c1] ^ T[T8_5_START + c2] ^ T[T8_4_START + c3];
            final int c4 = b[off + 4] & 0xff;
            final int c5 = b[off + 5] & 0xff;
            final int c6 = b[off + 6] & 0xff;
            final int c7 = b[off + 7] & 0xff;
            localCrc ^= T[T8_3_START + c4] ^ T[T8_2_START + c5] ^ T[T8_1_START + c6] ^ T[T8_0_START + c7];
            off += 8;
            len -= 8;
        }
        // loop unroll - duff's device style
        switch (len) {
        case 7:
            localCrc = localCrc >>> 8 ^ T[T8_0_START + ((localCrc ^ b[off++]) & 0xff)];
            // falls-through
        case 6:
            localCrc = localCrc >>> 8 ^ T[T8_0_START + ((localCrc ^ b[off++]) & 0xff)];
            // falls-through
        case 5:
            localCrc = localCrc >>> 8 ^ T[T8_0_START + ((localCrc ^ b[off++]) & 0xff)];
            // falls-through
        case 4:
            localCrc = localCrc >>> 8 ^ T[T8_0_START + ((localCrc ^ b[off++]) & 0xff)];
            // falls-through
        case 3:
            localCrc = localCrc >>> 8 ^ T[T8_0_START + ((localCrc ^ b[off++]) & 0xff)];
            // falls-through
        case 2:
            localCrc = localCrc >>> 8 ^ T[T8_0_START + ((localCrc ^ b[off++]) & 0xff)];
            // falls-through
        case 1:
            localCrc = localCrc >>> 8 ^ T[T8_0_START + ((localCrc ^ b[off++]) & 0xff)];
            // falls-through
        default:
            break; // satisfy Findbugs
        }
        // Publish crc out to object
        crc = localCrc;
    }