ExternalPipe.hxx

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// ExternalPipe.hxx -- a "pipe" interface to an external flight dynamics model
//
// Written by Curtis Olson, started March 2003.
//
// Copyright (C) 2003  Curtis L. Olson  - http://www.flightgear.org/~curt
//
// This program 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 of the
// License, or (at your option) any later version.
//
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
// $Id$
 
#ifndef _EXTERNAL_PIPE_HXX
#define _EXTERNAL_PIPE_HXX
 
#include <stdio.h>              // FILE*, fopen(), fread(), fwrite(), et. al.
 
#include <simgear/timing/timestamp.hxx> // fine grained timing measurements
 
#include <Network/net_ctrls.hxx>
#include <Network/net_fdm.hxx>
#include <FDM/flight.hxx>
 
 
class FGExternalPipe : public FGInterface
{
private:
    bool valid;
 
    std::string fifo_name_1;
    std::string fifo_name_2;
    FILE *pd1;
    FILE *pd2;
    std::string _protocol;
 
    FGNetCtrls ctrls;
    FGNetFDM fdm;
    char *buf;
 
    double last_weight;
    double last_cg_offset;
 
    std::vector <std::string> property_names;
    std::vector <SGPropertyNode_ptr> nodes;
 
    // Protocol specific init routines
    void init_binary();
    void init_property();
 
    // Protocol specific update routines
    void update_binary( double dt );
    void update_property( double dt );
 
    void process_set_command( const string_list &tokens );
 
public:
    // Constructor
    FGExternalPipe( double dt, std::string fifo_name, std::string protocol );
 
    // Destructor
    ~FGExternalPipe();
 
    // Subsystem API.
    void init() override;
    void update(double dt) override;
 
    // Subsystem identification.
    static const char* staticSubsystemClassId() { return "pipe"; }
};
 
#endif // _EXTERNAL_PIPE_HXX