Method writeHeader

java/core/src/java/org/apache/orc/impl/OutStream.java:183–190

Write the length of the compressed bytes. Life is much easier if the header is constant length, so just use 3 bytes. Considering most of the codecs want between 32k (snappy) and 256k (lzo, zlib), 3 bytes should be plenty. We also use the low bit for whether it is the original or compressed bytes. @p

(ByteBuffer buffer,
                                  int position,
                                  int val,
                                  boolean original)

   * @param original is it uncompressed
   */
  private static void writeHeader(ByteBuffer buffer,
                                  int position,
                                  int val,
                                  boolean original) {
    buffer.put(position, (byte) ((val << 1) + (original ? 1 : 0)));
    buffer.put(position + 1, (byte) (val >> 7));
    buffer.put(position + 2, (byte) (val >> 15));
  }

  private void getNewInputBuffer() {
    if (codec == null) {