git.mutantstargoat.com Git - vrtris/blob - src/opt.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include "optcfg.h"
   5 #include "opt.h"
   6
   7
   8 struct options def_opt = { 1024, 768, 0 };
   9
  10 enum {
  11         OPTCFG_SIZE,
  12         OPTCFG_VR,
  13         OPTCFG_FULLSCREEN,
  14         OPTCFG_WINDOWED,
  15         OPTCFG_HELP
  16 };
  17
  18 static struct optcfg_option options[] = {
  19         // short, long, id, desc
  20         {'s', "size", OPTCFG_SIZE, "window size (WxH)"},
  21         {0, "vr", OPTCFG_VR, "enable VR mode"},
  22         {'f', "fullscreen", OPTCFG_FULLSCREEN, "run in fullscreen mode"},
  23         {'w', "windowed", OPTCFG_WINDOWED, "run in windowed mode"},
  24         {'h', "help", OPTCFG_HELP, "print usage and exit"},
  25         OPTCFG_OPTIONS_END
  26 };
  27
  28 static int opt_handler(struct optcfg *oc, int opt, void *cls);
  29 static int arg_handler(struct optcfg *oc, const char *arg, void *cls);
  30
  31 static char *argv0;
  32
  33 int init_options(int argc, char **argv, const char *cfgfile)
  34 {
  35         struct optcfg *oc;
  36
  37         /* default options */
  38         opt = def_opt;
  39
  40         argv0 = argv[0];
  41
  42         oc = optcfg_init(options);
  43         optcfg_set_opt_callback(oc, opt_handler, 0);
  44         optcfg_set_arg_callback(oc, arg_handler, 0);
  45
  46         if(cfgfile) {
  47                 optcfg_parse_config_file(oc, cfgfile);
  48         }
  49
  50         if(argv && optcfg_parse_args(oc, argc, argv) == -1) {
  51                 fprintf(stderr, "invalid option\n");
  52                 optcfg_destroy(oc);
  53                 return -1;
  54         }
  55
  56         optcfg_destroy(oc);
  57         return 0;
  58 }
  59
  60 static int is_enabled(struct optcfg *oc)
  61 {
  62         int res;
  63         optcfg_enabled_value(oc, &res);
  64         return res != 0;
  65 }
  66
  67 static int opt_handler(struct optcfg *oc, int optid, void *cls)
  68 {
  69         switch(optid) {
  70         case OPTCFG_SIZE:
  71                 {
  72                         char *valstr = optcfg_next_value(oc);
  73                         if(!valstr || sscanf(valstr, "%dx%d", &opt.width, &opt.height) != 2) {
  74                                 fprintf(stderr, "size must be in the form: WIDTHxHEIGHT\n");
  75                                 return -1;
  76                         }
  77                 }
  78                 break;
  79
  80         case OPTCFG_VR:
  81                 if(is_enabled(oc)) {
  82                         opt.flags |= OPT_VR;
  83                 } else {
  84                         opt.flags &= ~OPT_VR;
  85                 }
  86                 break;
  87
  88         case OPTCFG_FULLSCREEN:
  89                 if(is_enabled(oc)) {
  90                         opt.flags |= OPT_FULLSCREEN;
  91                 } else {
  92                         opt.flags &= ~OPT_FULLSCREEN;
  93                 }
  94                 break;
  95
  96         case OPTCFG_WINDOWED:
  97                 if(is_enabled(oc)) {
  98                         opt.flags &= ~OPT_FULLSCREEN;
  99                 } else {
 100                         opt.flags |= OPT_FULLSCREEN;
 101                 }
 102                 break;
 103
 104         case OPTCFG_HELP:
 105                 printf("Usage: %s [options]\nOptions:\n", argv0);
 106                 optcfg_print_options(oc);
 107                 exit(0);
 108         }
 109         return 0;
 110 }
 111
 112 static int arg_handler(struct optcfg *oc, const char *arg, void *cls)
 113 {
 114         fprintf(stderr, "unexpected argument: %s\n", arg);
 115         return -1;
 116 }