/* -*- 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.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <gr_null_source.h>

#include <gr_io_signature.h>

gr_null_source::gr_null_source (size_t sizeof_stream_item)

  : gr_sync_block ("null_source",

                   gr_make_io_signature (0, 0, 0),

                   gr_make_io_signature (1, 1, sizeof_stream_item))

{

}

gr_block_sptr

gr_make_null_source (size_t sizeof_stream_item)

{

  return gr_block_sptr (new gr_null_source (sizeof_stream_item));

}

int

gr_null_source::work (int noutput_items,

                      gr_vector_const_void_star &input_items,

                      gr_vector_void_star &output_items)

{

  void *optr = (void *) output_items[0];

  memset (optr, 0, noutput_items * output_signature()->sizeof_stream_item (0));

  return noutput_items;

}