Method isRed

java/core/src/java/org/apache/orc/impl/RedBlackTree.java:71–74

Is the given node red as opposed to black? To prevent having an extra word in the data array, we just the low bit on the left child index.

(int position)

   * in the data array, we just the low bit on the left child index.
   */
  protected boolean isRed(int position) {
    return position != NULL &&
        (data.get(position * ELEMENT_SIZE + LEFT_OFFSET) & 1) == 1;
  }

  /**
   * Set the red bit true or false.