1 /* -*- c++ -*- */
2 /*
3 * Copyright 2004,2010,2013 Free Software Foundation, Inc.
4 *
5 * This file is part of GNU Radio
6 *
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
10 * any later version.
11 *
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
21 */
22
23 #ifdef HAVE_CONFIG_H
24 #include "config.h"
25 #endif
26
27 #include "null_source_impl.h"
28 #include <gnuradio/io_signature.h>
29 #include <string.h>
30
31 namespace gr {
32 namespace blocks {
33
make(size_t sizeof_stream_item)34 null_source::sptr null_source::make(size_t sizeof_stream_item)
35 {
36 return gnuradio::get_initial_sptr(new null_source_impl(sizeof_stream_item));
37 }
38
null_source_impl(size_t sizeof_stream_item)39 null_source_impl::null_source_impl(size_t sizeof_stream_item)
40 : sync_block("null_source",
41 io_signature::make(0, 0, 0),
42 io_signature::make(1, -1, sizeof_stream_item))
43 {
44 }
45
~null_source_impl()46 null_source_impl::~null_source_impl() {}
47
work(int noutput_items,gr_vector_const_void_star & input_items,gr_vector_void_star & output_items)48 int null_source_impl::work(int noutput_items,
49 gr_vector_const_void_star& input_items,
50 gr_vector_void_star& output_items)
51 {
52 void* optr;
53 for (size_t n = 0; n < input_items.size(); n++) {
54 optr = (void*)output_items[n];
55 memset(optr, 0, noutput_items * output_signature()->sizeof_stream_item(n));
56 }
57 return noutput_items;
58 }
59
60 } /* namespace blocks */
61 } /* namespace gr */
62