1 #include <stdio.h>

2 #include <string.h>

3 #include <stdlib.h>

4 #include "opt.h"

5

6 Options opt;

7

8 static void default_opt()

9 {

10 opt.xsz = 800;

11 opt.ysz = 450;

12 opt.stereo = false;

13

14 opt.world_size[0] = opt.world_size[1] = 128;

15 opt.world_size[2] = 64;

16

17 opt.gen_noise_scale = 1.0f;

18 }

19

20 bool parse_opt(int argc, char **argv)

21 {

22 default_opt();

23

24 for(int i=1; i<argc; i++) {

25 if(argv[i][0] == '-') {

26 if(strcmp(argv[i], "-size") == 0) {

27 if(sscanf(argv[++i], "%dx%d", &opt.xsz, &opt.ysz) != 2) {

28 fprintf(stderr, "-size must be followed by <width>x<height>\n");

29 return false;

30 }

31 } else if(strcmp(argv[i], "-world") == 0) {

32 if(sscanf(argv[++i], "%dx%dx%d", opt.world_size, opt.world_size + 1, opt.world_size + 2) != 3) {

33 fprintf(stderr, "-world must be followed by <width>x<height>x<depth>\n");

34 return false;

35 }

36 } else if(strcmp(argv[i], "-genscale") == 0) {

37 char *endp;

38 opt.gen_noise_scale = strtod(argv[++i], &endp);

39 if(endp == argv[i]) {

40 fprintf(stderr, "-genscale must be followed by a scaling factor\n");

41 return false;

42 }

43 } else if(strcmp(argv[i], "-stereo") == 0) {

44 opt.stereo = true;

45 } else {

46 fprintf(stderr, "invalid option: %s\n", argv[i]);

47 return false;

48 }

49 } else {

50 fprintf(stderr, "unexpected argument: %s\n", argv[i]);

51 return false;

52 }

53 }

54 return true;

55 }