/*                               -*- Mode: C -*- 
 * 
 * This library is free software; you can redistribute it and/or          
 * modify it under the terms of the GNU Library General Public            
 * License as published by the Free Software Foundation.                  
 * This library 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      
 * Library General Public License for more details.                       
 * If you do not have a copy of the GNU Library General Public            
 * License, write to The Free Software Foundation, Inc.,                  
 * 675 Mass Ave, Cambridge, MA 02139, USA.                                
 *                                                                        
 * For more information on this program, contact Blair MacIntyre          
 * (bm@cs.columbia.edu) or Steven Feiner (feiner@cs.columbia.edu)         
 * at the Computer Science Dept., Columbia University,                    
 * 500 W 120th St, Room 450, New York, NY, 10027.                         
 *                                                                        
 * Copyright (C) Blair MacIntyre 1995, Columbia University 1995           
 * 
 * Author          : Ruigang Yang
 * Created On      : Tue Feb  3 18:34:18 1998
 * Last Modified By: Ruigang Yang
 * Last Modified On: Thu Jul 30 16:12:19 1998
 * Update Count    : 72
 * 
 * $Source$
 * $Date$
 * $Author$
 * $Revision$
 * 
 * $Log$
 * SCCS Status     : %W%	%G%
 * 
 * HISTORY
 */

static char rcsid[] = "$Id$";


#include <stdlib.h>
#include <stdio.h>
#include <vrpn_Tracker.h>
#include <signal.h>

/* These are the callback handlers*/
void tracker_handler(void *userdata, const vrpn_TRACKERCB b);
void closeDevices();

FILE * recordfp;
int  totalRecord;

void tracker_handler(void *userdata, const vrpn_TRACKERCB t) {
  if (recordfp != NULL) 
    fwrite(&t, sizeof(t), 1, recordfp);
  totalRecord ++;
}


//#ifdef sgi
//void sighandler( ... )
//#else
void sighandler( int signal )
     //#endif
{
    closeDevices();
    return;
}

void closeDevices() {
  fprintf(stderr, "Closing tracker data file...%d recorded, headsize =%d",
	  totalRecord, sizeof(int));
  if(recordfp != NULL) {
    fseek(recordfp, 0, SEEK_SET);
    fwrite(&totalRecord, sizeof(int), 1, recordfp);
    fclose(recordfp);
  }
  fprintf(stderr, "\nAll devices closed. Exiting ...\n");
  exit(0);
}

main() {
#ifdef sgi
  sigset( SIGINT, sighandler );
  sigset( SIGKILL, sighandler );
  sigset( SIGTERM, sighandler );
  sigset( SIGPIPE, sighandler );
#else
  signal( SIGINT, sighandler );
  signal( SIGKILL, sighandler );
  signal( SIGTERM, sighandler );
  signal( SIGPIPE, sighandler );
#endif // sgi


  vrpn_Tracker_Remote *tracker;

  fprintf(stderr, "Attempting to connect to vrpn server.\n");

  tracker = new vrpn_Tracker_Remote("Tracker0@nameless.cs.jhu.edu");

  if (!tracker->connectionPtr())
  {
 fprintf(stderr, "Application couldn't connect to vrpn server.  Exiting...\n");
       exit(1);
  }

  tracker->register_change_handler(NULL, 
				   (vrpn_TRACKERCHANGEHANDLER)tracker_handler);

  recordfp = fopen("tracker.dat", "w");
  if (recordfp != NULL)
  {
    fprintf(stderr, "Writing file: tracker.dat\n");
    fwrite(&totalRecord, sizeof(int), 1, recordfp);
  }
  else
  {
     perror("Can't open data file for recording:");
     exit(1);
  }

  while (1)
    tracker->mainloop();

}