git.itanic.dy.fi Git - log-plotter/blob - options.c

   1 #include <getopt.h>
   2 #include <string.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 #include "options.h"
   7
   8 static void set_default_options(struct plotter_options *opts)
   9 {
  10         bzero(opts, sizeof(*opts));
  11
  12         opts->baud_rate = 128000;
  13         opts->device_path = "/dev/ttyUSB0";
  14 }
  15
  16 int read_args(int argc, char *argv[], struct plotter_options *opts)
  17 {
  18         int option_index = 0, c;
  19         static struct option long_options[] = {
  20                 { .val = 'd', .name = "device", .has_arg = 1, },
  21                 { .val = 'o', .name = "output", .has_arg = 1 },
  22                 { .val = 'o', .name = "baud", .has_arg = 1 },
  23         };
  24         char short_options[] = "d:o:b:";
  25
  26         set_default_options(opts);
  27
  28         while (1) {
  29                 c = getopt_long(argc, argv, short_options, long_options,
  30                                 &option_index);
  31
  32                 if (c == -1)
  33                         break;
  34
  35                 switch (c) {
  36                 case 'd':
  37                         opts->device_path = optarg;
  38                         break;
  39                 case 'o':
  40                         opts->output_path = optarg;
  41                         break;
  42                 case 'b':
  43                         opts->baud_rate = atoi(optarg);
  44                         break;
  45                 case '?':
  46                         return -1;
  47                 }
  48         }
  49
  50         while (optind < argc) {
  51                 /* The rest of the options, ignored */
  52                 optind++;
  53         }
  54
  55         return 0;
  56 }