Method checkArrayLength

src/HBaseRpc.java:1032–1045

Verifies that the given length looks like a reasonable array length. This method accepts 0 as a valid length. @param buf The buffer from which the length was read. @param length The length to validate. @throws IllegalArgumentException if the length is negative or suspiciously large.

(final ChannelBuffer buf, final long length)

   * suspiciously large.
   */
  static void checkArrayLength(final ChannelBuffer buf, final long length) {
    // 2 checks in 1.  If any of the high bits are set, we know the value is
    // either too large, or is negative (if the most-significant bit is set).
    if ((length & MAX_BYTE_ARRAY_MASK) != 0) {
      if (length < 0) {
        throw new IllegalArgumentException("Read negative byte array length: "
          + length + " in buf=" + buf + '=' + Bytes.pretty(buf));
      } else {
        throw new IllegalArgumentException("Read byte array length that's too"
          + " large: " + length + " > " + ~MAX_BYTE_ARRAY_MASK + " in buf="
          + buf + '=' + Bytes.pretty(buf));
      }
    }
  }

  /**
   * Verifies that the given array looks like a reasonably big array.