nuclear@1: #include <stdio.h>
nuclear@1: #include <string.h>
nuclear@1: #include <stdlib.h>
nuclear@0: #include "opt.h"
nuclear@0: 
nuclear@1: Options opt;
nuclear@1: 
nuclear@1: static void default_opt()
nuclear@1: {
nuclear@1: 	opt.xsz = 800;
nuclear@1: 	opt.ysz = 450;
nuclear@1: 	opt.stereo = false;
nuclear@1: 
nuclear@1: 	opt.world_size[0] = opt.world_size[1] = 128;
nuclear@1: 	opt.world_size[2] = 64;
nuclear@1: 
nuclear@1: 	opt.gen_noise_scale = 1.0f;
nuclear@1: }
nuclear@1: 
nuclear@0: bool parse_opt(int argc, char **argv)
nuclear@0: {
nuclear@1: 	default_opt();
nuclear@1: 
nuclear@1: 	for(int i=1; i<argc; i++) {
nuclear@1: 		if(argv[i][0] == '-') {
nuclear@1: 			if(strcmp(argv[i], "-size") == 0) {
nuclear@1: 				if(sscanf(argv[++i], "%dx%d", &opt.xsz, &opt.ysz) != 2) {
nuclear@1: 					fprintf(stderr, "-size must be followed by <width>x<height>\n");
nuclear@1: 					return false;
nuclear@1: 				}
nuclear@1: 			} else if(strcmp(argv[i], "-world") == 0) {
nuclear@1: 				if(sscanf(argv[++i], "%dx%dx%d", opt.world_size, opt.world_size + 1, opt.world_size + 2) != 3) {
nuclear@1: 					fprintf(stderr, "-world must be followed by <width>x<height>x<depth>\n");
nuclear@1: 					return false;
nuclear@1: 				}
nuclear@1: 			} else if(strcmp(argv[i], "-genscale") == 0) {
nuclear@1: 				char *endp;
nuclear@1: 				opt.gen_noise_scale = strtod(argv[++i], &endp);
nuclear@1: 				if(endp == argv[i]) {
nuclear@1: 					fprintf(stderr, "-genscale must be followed by a scaling factor\n");
nuclear@1: 					return false;
nuclear@1: 				}
nuclear@1: 			} else if(strcmp(argv[i], "-stereo") == 0) {
nuclear@1: 				opt.stereo = true;
nuclear@1: 			} else {
nuclear@1: 				fprintf(stderr, "invalid option: %s\n", argv[i]);
nuclear@1: 				return false;
nuclear@1: 			}
nuclear@1: 		} else {
nuclear@1: 			fprintf(stderr, "unexpected argument: %s\n", argv[i]);
nuclear@1: 			return false;
nuclear@1: 		}
nuclear@1: 	}
nuclear@0: 	return true;
nuclear@0: }