Method combineBuffers

guava/src/com/google/common/io/ByteStreams.java:211–229

(Queue<byte[]> bufs, int totalLen)

  }

  private static byte[] combineBuffers(Queue<byte[]> bufs, int totalLen) {
    if (bufs.isEmpty()) {
      return new byte[0];
    }
    byte[] result = bufs.remove();
    if (result.length == totalLen) {
      return result;
    }
    int remaining = totalLen - result.length;
    result = Arrays.copyOf(result, totalLen);
    while (remaining > 0) {
      byte[] buf = bufs.remove();
      int bytesToCopy = min(remaining, buf.length);
      int resultOffset = totalLen - remaining;
      System.arraycopy(buf, 0, result, resultOffset, bytesToCopy);
      remaining -= bytesToCopy;
    }
    return result;
  }

  /**
   * Reads all bytes from an input stream into a byte array. Does not close the stream.