Method jump

src/main/java/core/org/xbill/DNS/DNSInput.java:118–126

Resets the current position of the input stream to the specified index, and clears the active region. @param index The position to continue parsing at. @throws IllegalArgumentException The index is not within the input.

(int index)

 * @throws IllegalArgumentException The index is not within the input.
 */
public void
jump(int index) {
	if (index >= byteBuffer.capacity()) {
		throw new IllegalArgumentException("cannot jump past " +
						   "end of input");
	}
	byteBuffer.position(index);
	byteBuffer.limit(byteBuffer.capacity());
}

/**
 * Saves the current state of the input stream.  Both the current position and