/* -*- c++ -*- */

/*

 * Copyright 2004 Free Software Foundation, Inc.

 * 

 * This file is part of GNU Radio

 * 

 * GNU Radio is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3, or (at your option)

 * any later version.

 * 

 * GNU Radio is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with GNU Radio; see the file COPYING.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street,

 * Boston, MA 02110-1301, USA.

 */

#ifndef INCLUDED_GR_NOP_H

#define INCLUDED_GR_NOP_H

#include <gr_block.h>

#include <stddef.h>                        // size_t

/*!

 * \brief Does nothing.  Used for testing only.

 * \ingroup block

 */

class gr_nop : public gr_block

{

  friend gr_block_sptr gr_make_nop (size_t sizeof_stream_item);

  gr_nop (size_t sizeof_stream_item);

 public:

  virtual int general_work (int noutput_items,

                            gr_vector_int &ninput_items,

                            gr_vector_const_void_star &input_items,

                            gr_vector_void_star &output_items);

};

gr_block_sptr

gr_make_nop (size_t sizeof_stream_item);

#endif /* INCLUDED_GR_NOP_H */