98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
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// native.cxx -- FGFS "Native" protocal class
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//
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// Written by Curtis Olson, started November 1999.
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//
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// Copyright (C) 1999 Curtis L. Olson - curt@flightgear.org
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#include <Debug/logstream.hxx>
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#include <Math/fg_geodesy.hxx>
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#include <Time/fg_time.hxx>
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#include "iochannel.hxx"
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#include "native.hxx"
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FGNative::FGNative() {
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}
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FGNative::~FGNative() {
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}
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// open hailing frequencies
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bool FGNative::open() {
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if ( is_enabled() ) {
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FG_LOG( FG_IO, FG_ALERT, "This shouldn't happen, but the channel "
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<< "is already in use, ignoring" );
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return false;
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}
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FGIOChannel *io = get_io_channel();
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if ( ! io->open( get_direction() ) ) {
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FG_LOG( FG_IO, FG_ALERT, "Error opening channel communication layer." );
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return false;
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}
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set_enabled( true );
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return true;
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}
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// process work for this port
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bool FGNative::process() {
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FGIOChannel *io = get_io_channel();
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int length = sizeof(*cur_fdm_state);
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if ( get_direction() == out ) {
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// cout << "size of cur_fdm_state = " << length << endl;
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buf = *cur_fdm_state;
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if ( ! io->write( (char *)(& buf), length ) ) {
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FG_LOG( FG_IO, FG_ALERT, "Error writing data." );
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return false;
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}
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} else if ( get_direction() == in ) {
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if ( io->read( (char *)(& buf), length ) == length ) {
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FG_LOG( FG_IO, FG_ALERT, "Success reading data." );
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*cur_fdm_state = buf;
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} else {
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FG_LOG( FG_IO, FG_ALERT, "Error reading data." );
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return false;
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}
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}
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return true;
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}
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// close the channel
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bool FGNative::close() {
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FGIOChannel *io = get_io_channel();
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set_enabled( false );
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if ( ! io->close() ) {
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return false;
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}
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return true;
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}
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