popufare/busunit/helper/gpsdist.c

/*
 * Copyright (c) 2019 Clementine Computing LLC.
 *
 * This file is part of PopuFare.
 * 
 * PopuFare is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * PopuFare 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with PopuFare.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

#include "../common/gpsmath.h"

void usage(FILE *fp) {
  fprintf(fp, "\nusage:\n\n");
  fprintf(fp, "  gpsdist <lat0> <lon0> <lat1> <lon1>");
  fprintf(fp, "\n\n");
}

int main(int argc, char **argv) {
  float lat0, lon0, lat1, lon1;
  float dist;

  if (argc < 5) {
    usage(stderr);
    exit(-1);
  }

  lat0 = atof(argv[1]);
  lon0 = atof(argv[2]);
  lat1 = atof(argv[3]);
  lon1 = atof(argv[4]);

  dist = GPS_Dist(lat0, lon0, lat1, lon1);

  printf("Distance = %f meters\n", dist);

}