git.sesse.net Git - nageru/blob - flags.cpp

   1 #include "flags.h"
   2
   3 #include <getopt.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7
   8 #include <utility>
   9
  10 using namespace std;
  11
  12 Flags global_flags;
  13
  14 // Long options that have no corresponding short option.
  15 enum LongOption {
  16         OPTION_HELP = 1000,
  17         OPTION_SLOW_DOWN_INPUT = 1001
  18 };
  19
  20 void usage()
  21 {
  22         fprintf(stderr, "Usage: futatabi [OPTION]... SOURCE_URL\n");
  23         fprintf(stderr, "\n");
  24         fprintf(stderr, "      --help                      print usage information\n");
  25         fprintf(stderr, "      --slow-down-input           slow down input to realtime (default on if no\n");
  26         fprintf(stderr, "                                    source URL given)");
  27 }
  28
  29 void parse_flags(int argc, char * const argv[])
  30 {
  31         static const option long_options[] = {
  32                 { "help", no_argument, 0, OPTION_HELP },
  33                 { "slow-down-input", no_argument, 0, OPTION_SLOW_DOWN_INPUT },
  34                 { 0, 0, 0, 0 }
  35         };
  36         for ( ;; ) {
  37                 int option_index = 0;
  38                 int c = getopt_long(argc, argv, "q:", long_options, &option_index);
  39
  40                 if (c == -1) {
  41                         break;
  42                 }
  43                 switch (c) {
  44                 case OPTION_SLOW_DOWN_INPUT:
  45                         global_flags.slow_down_input = true;
  46                         break;
  47                 case OPTION_HELP:
  48                         usage();
  49                         exit(0);
  50                 default:
  51                         fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
  52                         fprintf(stderr, "\n");
  53                         usage();
  54                         exit(1);
  55                 }
  56         }
  57 }