ret = available(); outOffset = outLength = 0;
ret = outBuffer.length - outOffset; outOffset = outBuffer.length;
  public long skip(long bytes) throws IOException  {    if (isStream)      {        return super.skip(bytes);      }    long ret = 0;    if (bytes > 0 && available() > 0)      {        ret = available();        outOffset = outLength = 0;      }    return ret;  }