1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/opt.cc	Tue Apr 07 11:16:56 2015 +0300
     1.3 @@ -0,0 +1,71 @@
     1.4 +#include <stdio.h>
     1.5 +#include "opt.h"
     1.6 +
     1.7 +enum {
     1.8 +	OPT_SIZE,
     1.9 +	OPT_FULLSCREEN,
    1.10 +	OPT_WINDOWED,
    1.11 +	OPT_VR,
    1.12 +	OPT_HELP,
    1.13 +
    1.14 +	NUM_OPTS
    1.15 +};
    1.16 +static const char *optname[] = {
    1.17 +	"size", "fullscreen", "windowed", "vr", "help", 0
    1.18 +};
    1.19 +
    1.20 +static int get_option(const char *str);
    1.21 +
    1.22 +void default_opt(Options *opt)
    1.23 +{
    1.24 +	opt->xres = 1280;
    1.25 +	opt->yres = 800;
    1.26 +	opt->fov = 50.0;
    1.27 +	opt->fullscreen = false;
    1.28 +	opt->use_vr = false;
    1.29 +}
    1.30 +
    1.31 +bool parse_args(Options *opt, int argc, char **argv)
    1.32 +{
    1.33 +	for(int i=1; i<argc; i++) {
    1.34 +		if(argv[i][0] == '-') {
    1.35 +			int o = get_option(argv[i] + 1);
    1.36 +			switch(o) {
    1.37 +			case OPT_SIZE:
    1.38 +				if(sscanf(argv[++i], "%dx%d", &opt->xres, &opt->yres) != 2) {
    1.39 +					fprintf(stderr, "invalid argument to option: %s\n", argv[i - 1]);
    1.40 +					return false;
    1.41 +				}
    1.42 +				break;
    1.43 +
    1.44 +			case OPT_FULLSCREEN:
    1.45 +				opt->fullscreen = true;
    1.46 +				break;
    1.47 +			case OPT_WINDOWED:
    1.48 +				opt->fullscreen = false;
    1.49 +				break;
    1.50 +
    1.51 +			case OPT_VR:
    1.52 +				opt->use_vr = true;
    1.53 +				break;
    1.54 +
    1.55 +			case OPT_HELP:
    1.56 +				printf("options:\n");
    1.57 +				for(int j=0; optname[j]; j++) {
    1.58 +					printf(" -%s\n", optname[j]);
    1.59 +				}
    1.60 +				break;
    1.61 +			}
    1.62 +		}
    1.63 +	}
    1.64 +}
    1.65 +
    1.66 +static int get_option(const char *str)
    1.67 +{
    1.68 +	for(int i=0; optname[i], i++) {
    1.69 +		if(strcmp(str, optname[i]) == 0) {
    1.70 +			return i;
    1.71 +		}
    1.72 +	}
    1.73 +	return -1;
    1.74 +}