diff options
Diffstat (limited to 'gnuradio-core/src/lib/general/gr_head.h')
| -rw-r--r-- | gnuradio-core/src/lib/general/gr_head.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/gnuradio-core/src/lib/general/gr_head.h b/gnuradio-core/src/lib/general/gr_head.h new file mode 100644 index 000000000..125ee14b6 --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_head.h @@ -0,0 +1,54 @@ +/* -*- 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 2, 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., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#ifndef INCLUDED_GR_HEAD_H +#define INCLUDED_GR_HEAD_H + +#include <gr_sync_block.h> +#include <stddef.h> // size_t + +/*! + * \brief copies the first N items to the output then signals done + * \ingroup block + * + * Useful for building test cases + */ + +class gr_head : public gr_sync_block +{ + friend gr_block_sptr gr_make_head (size_t sizeof_stream_item, int nitems); + gr_head (size_t sizeof_stream_item, int nitems); + + int d_nitems; + int d_ncopied_items; + + public: + int work (int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); +}; + +gr_block_sptr +gr_make_head (size_t sizeof_stream_item, int nitems); + + +#endif /* INCLUDED_GR_HEAD_H */ |