/* -*- c++ -*- */
/*
 * Copyright 2004,2010,2013 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 "null_source_impl.h"
#include <gr_io_signature.h>
#include <string.h>

namespace gr {
  namespace blocks {

    null_source::sptr
    null_source::make(size_t sizeof_stream_item)
    {
      return gnuradio::get_initial_sptr
        (new null_source_impl(sizeof_stream_item));
    }

    null_source_impl::null_source_impl (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))
    {
    }

    null_source_impl::~null_source_impl()
    {
    }

    int
    null_source_impl::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;
    }

  } /* namespace blocks */
} /* namespace gr */