RFR 8135248: Add utility methods to check indexes and ranges

[Jeff Hain]

Hi.



In your webrev:

+ if ((length | fromIndex | size) < 0 || size > length - fromIndex)
+   throw outOfBounds(fromIndex, size, length, oobe);



In Buffer.java (equivalent if adding "| size"):
    static void checkBounds(int off, int len, int size) { // package-private
        if ((off | len | (off + len) | (size - (off + len))) < 0)
            throw new IndexOutOfBoundsException();
    }



Maybe the second way (only one boolean check) is better for perfs?



-Jeff