/*
 * Tlf - contest logging program for amateur radio operators
 * Copyright (C) 2001-2002-2003 Rein Couperus <pa0rct@amsat.org>
 *
 * 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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "changefreq.h"

int (change_freq)(void) {

extern float freq;
extern int trx_control;
#ifdef HAVE_LIBHAMLIB
extern freq_t outfreq;
#else
extern int outfreq;
#endif
int brkflg = 0;
int x;

if (trx_control == 0)
	return(-1);	
		
	while (1)  {

			freq_display();

	if(outfreq == 0)   {
			x = onechar();

			switch (x) {
		 	
		 		
		 		case 152 : {                                                                  //up	
#ifdef HAVE_LIBHAMLIB		 			
		 			outfreq = (freq_t) (freq * 1000);
#else
		 			outfreq = (int) (freq * 1000);
#endif
					outfreq += 100;

					break;
		 		}
		 		case 153 : {                                                                  //down
#ifdef HAVE_LIBHAMLIB		 			
		 			outfreq = (freq_t) (freq * 1000);
#else
		 			outfreq = (int) (freq * 1000);
#endif
					outfreq -= 100;

					break;
		 		}
		 		case 154 : {                                                                  //right
#ifdef HAVE_LIBHAMLIB		 			
		 			outfreq = (freq_t) (freq * 1000);
#else
		 			outfreq = (int) (freq * 1000);
#endif
					outfreq += 20;

					break;
		 		}
		 		case 155 : {                                                                  //left
#ifdef HAVE_LIBHAMLIB
		 			outfreq = (freq_t) (freq * 1000);
#else
		 			outfreq = (int) (freq * 1000);
#endif
					outfreq -= 20;

					break;
		 		}
		 		case 156 : {                                                                  //left
#ifdef HAVE_LIBHAMLIB
		 			outfreq = (freq_t) (freq * 1000);
#else
		 			outfreq = (int) (freq * 1000);
#endif
					outfreq += 500;

					break;
		 		}
		 		case 157 : {                                                                  //left
#ifdef HAVE_LIBHAMLIB
		 			outfreq = (freq_t) (freq * 1000);
#else
		 			outfreq = (int) (freq * 1000);
#endif
					outfreq -= 500;

					break;
		 		}


		 		default : {
		 			brkflg = 1;
		 			break;
		 		}
		 		

			}
	}


		if (brkflg ==1) {
	     	brkflg = 0;
	     	break;
	    }

		freq_display();
		
		time_update();

		usleep(100000);

	}

return(0);
}