/usr/include/gnuradio/blocks/message_debug.h is in gnuradio-dev 3.7.9.1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* Copyright 2005,2012-2013 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.
*/
#ifndef INCLUDED_GR_MESSAGE_DEBUG_H
#define INCLUDED_GR_MESSAGE_DEBUG_H
#include <gnuradio/blocks/api.h>
#include <gnuradio/block.h>
namespace gr {
namespace blocks {
/*!
* \brief Debug block for the message passing system.
* \ingroup message_tools_blk
* \ingroup measurement_tools_blk
* \ingroup debug_tools_blk
*
* \details
* The message debug block is used to capture and print or store
* messages as they are received. Any block that generates a
* message may connect that message port to one or more of the
* three message input ports of this debug block. The message
* ports are:
*
* \li print: prints the message directly to standard out.
* \li store: stores the message in an internal vector. May be
* access using the get_message function.
* \li print_pdu: specifically designed to handle formatted PDUs
* (see pdu.h).
*/
class BLOCKS_API message_debug : virtual public block
{
public:
// gr::blocks::message_debug::sptr
typedef boost::shared_ptr<message_debug> sptr;
/*!
* \brief Build the message debug block. It takes no parameters
* and has three message ports: print, store, and
* print_pdu.
*/
static sptr make();
/*!
* \brief Reports the number of messages received by this block.
*/
virtual int num_messages() = 0;
/*!
* \brief Get a message (as a PMT) from the message vector at index \p i.
*
* Messages passed to the 'store' port will be stored in a
* vector. This function retrieves those messages by index. They
* are index in order of when they were received (all messages
* are just pushed onto the back of a vector). This is mostly
* useful in debugging message passing graphs and in QA code.
*
* \param i The index in the vector for the message to retrieve.
*
* \return a message at index \p i as a pmt_t.
*/
virtual pmt::pmt_t get_message(int i) = 0;
};
} /* namespace blocks */
} /* namespace gr */
#endif /* INCLUDED_GR_MESSAGE_DEBUG_H */
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