git.mutantstargoat.com Git - laserbrain_demo/blob - src/opt.cc

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <optcfg.h>
   5 #include "opt.h"
   6
   7 Options opt;
   8
   9 Options def_opt = {
  10         1280, 800,
  11         false,  // vr
  12         false,  // fullscreen
  13         0,              // scene file
  14         true    // music
  15 };
  16
  17 enum {
  18         OPT_SIZE,
  19         OPT_VR,
  20         OPT_FULLSCREEN,
  21         OPT_WINDOWED,
  22         OPT_SCENEFILE,
  23         OPT_MUSIC,
  24         OPT_HELP
  25 };
  26
  27 static optcfg_option options[] = {
  28         // short, long, id, desc
  29         {'s', "size", OPT_SIZE, "window size (WxH)"},
  30         {0, "vr", OPT_VR, "enable VR mode"},
  31         {'f', "fullscreen", OPT_FULLSCREEN, "run in fullscreen mode"},
  32         {'w', "windowed", OPT_WINDOWED, "run in windowed mode"},
  33         {0, "scene", OPT_SCENEFILE, "scene file to open"},
  34         {'m', "music", OPT_MUSIC, "play background audio"},
  35         {'h', "help", OPT_HELP, "print usage and exit"},
  36         OPTCFG_OPTIONS_END
  37 };
  38
  39 static int opt_handler(optcfg *oc, int opt, void *cls);
  40 static int arg_handler(optcfg *oc, const char *arg, void *cls);
  41
  42 bool init_options(int argc, char **argv, const char *cfgfile)
  43 {
  44         // default options
  45         opt = def_opt;
  46
  47         optcfg *oc = optcfg_init(options);
  48         optcfg_set_opt_callback(oc, opt_handler, 0);
  49         optcfg_set_arg_callback(oc, arg_handler, 0);
  50
  51         if(cfgfile) {
  52                 optcfg_parse_config_file(oc, cfgfile);
  53         }
  54
  55         if(argv && optcfg_parse_args(oc, argc, argv) == -1) {
  56                 fprintf(stderr, "invalid option\n");
  57                 optcfg_destroy(oc);
  58                 return false;
  59         }
  60
  61         optcfg_destroy(oc);
  62         return true;
  63 }
  64
  65 static bool is_enabled(optcfg *oc)
  66 {
  67         int res;
  68         optcfg_enabled_value(oc, &res);
  69         return res != 0;
  70 }
  71
  72 static int opt_handler(optcfg *oc, int optid, void *cls)
  73 {
  74         switch(optid) {
  75         case OPT_SIZE:
  76                 {
  77                         char *valstr = optcfg_next_value(oc);
  78                         if(!valstr || sscanf(valstr, "%dx%d", &opt.width, &opt.height) != 2) {
  79                                 fprintf(stderr, "size must be in the form: WIDTHxHEIGHT\n");
  80                                 return -1;
  81                         }
  82                 }
  83                 break;
  84
  85         case OPT_VR:
  86                 opt.vr = is_enabled(oc);
  87                 break;
  88
  89         case OPT_FULLSCREEN:
  90                 opt.fullscreen = is_enabled(oc);
  91                 break;
  92
  93         case OPT_WINDOWED:
  94                 opt.fullscreen = !is_enabled(oc);
  95                 break;
  96
  97         case OPT_SCENEFILE:
  98                 opt.scenefile = strdup(optcfg_next_value(oc));
  99                 break;
 100
 101         case OPT_MUSIC:
 102                 opt.music = is_enabled(oc);
 103                 break;
 104
 105         case OPT_HELP:
 106                 printf("Usage: demo [options]\nOptions:\n");
 107                 optcfg_print_options(oc);
 108                 exit(0);
 109         }
 110         return 0;
 111 }
 112
 113 static int arg_handler(optcfg *oc, const char *arg, void *cls)
 114 {
 115         if(opt.scenefile) {
 116                 fprintf(stderr, "unexpected argument: %s\n", arg);
 117                 return -1;
 118         }
 119         opt.scenefile = arg;
 120         return 0;
 121 }