/*
 * $snafu: gardump.c,v 2.0 2003/10/06 19:14:00 marc Exp $
 *
 * Public Domain, 2001, Marco S Hyman <marc@snafu.org>
 */

#include <sys/types.h>

#include <err.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "gpslib.h"

static void
usage(const char* prog, const char* err, ...)
{
	if (err) {
		va_list ap;
		va_start(ap, err);
		vfprintf(stderr, err, ap);
		va_end(ap);
	}
	fprintf(stderr, "usage: %s [-vwrtu] [-d debug-level] [-p port]\n",
		prog);
	exit(1);
}

int
main(int argc, char * argv[])
{
	int waypoints = 0;
	int routes = 0;
	int tracks = 0;
	int utc = 0;
	int debug = 0;
	const char* port = DEFAULT_PORT;

	int opt;
	char* rem;
	gps_handle gps;

	while ((opt = getopt(argc, argv, "d:vwrtup:")) != -1) {
		switch (opt) {
		case 'd':
			debug = strtol(optarg, &rem, 0);
			if (*rem)
				debug = 0;
			if (! debug)
				usage(argv[ 0 ], "`%s' is a bad debug value\n",
				      optarg);
			break;
		case 'v':
			errx(1, "software version %s", VERSION);
			/* does not return */
		case 'w':
			waypoints = 1;
			break;
		case 'r':
			routes = 1;
			break;
		case 't':
			tracks = 1;
			break;
		case 'u':
			utc = 1;
			break;
		case 'p':
			port = strdup(optarg);
			break;
		case '?':
		default:
			usage(argv[ 0 ], 0);
			/* does not return */
		}
	}

	if (argc != optind)
		errx(1, "unknown command line argument: %s ...", argv[optind]);
	
	if (!waypoints && !routes && !tracks && !utc)
		waypoints = routes = tracks = utc = 1;

	gps = gps_open(port, debug);
	printf("[gardump version %s]\n", VERSION);
	if (gps_version(gps) != 1)
		errx(1, "can't communicate with GPS unit");

	if (utc)
		gps_cmd(gps, CMD_UTC);
	if (waypoints)
		gps_cmd(gps, CMD_WPT);
	if (routes)
		gps_cmd(gps, CMD_RTE);
	if (tracks)
		gps_cmd(gps, CMD_TRK);
	gps_close(gps);

	return 0;
}