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  1. #include <stdio.h>
  2.  
  3.     #define D1_VAL  1
  4.     #define D2_VAL  2
  5.     #define D3_VAL  19
  6.     #define D4_VAL  4
  7.     #define D5_VAL  14
  8.  
  9. 	#define D_CNT	5
  10. 	#define D_OFS	0
  11.  
  12.     #define O1_VAL  6
  13.     #define O2_VAL  12
  14.     #define O3_VAL  15
  15.     #define O4_VAL  17
  16.  
  17.     #define O_CNT	4
  18. 	#define O_OFS	D_CNT
  19.  
  20. 	#define PIN_NUM_CNT		(D_CNT+O_CNT)
  21. 	#define PIN_GRP_CNT		2
  22.  
  23. enum decode_res_e {
  24. 	DECODE_OK = 0,
  25. 	DECODE_ERR = !DECODE_OK
  26. };
  27.  
  28. int const pin_num_tab[PIN_NUM_CNT] = {
  29. 	D1_VAL, D2_VAL, D3_VAL, D4_VAL, D5_VAL,
  30. 	O1_VAL, O2_VAL, O3_VAL, O4_VAL,
  31. };
  32.  
  33. typedef struct { unsigned char chr, ofs, cnt; } pin_grp_t;
  34.  
  35. pin_grp_t const pin_grp_tab[2] = {
  36. 	{ .chr = 'd', .ofs = D_OFS, .cnt = D_CNT },
  37. 	{ .chr = 'o', .ofs = O_OFS, .cnt = O_CNT },
  38. };
  39.  
  40. int pin_to_num(int * num, unsigned char * pin)
  41. {
  42. 	unsigned char i = 0, tmp = pin[1] - 0x31;
  43. 	while (i < PIN_GRP_CNT) {
  44. 		if (pin_grp_tab[i].chr == pin[0]) {
  45. 			if (tmp >= pin_grp_tab[i].cnt) break;
  46. 			*num = pin_num_tab[pin_grp_tab[i].ofs + tmp];
  47. 			return DECODE_OK;
  48. 		}
  49. 		i++;
  50. 	}
  51. 	return DECODE_ERR;
  52. }
  53.  
  54. int main(void) {
  55. 	int num;
  56. 	unsigned char const inp[] = "d6";
  57. 	printf("\f%s is ",inp);
  58. 	if (pin_to_num(&num,inp) == DECODE_OK) {
  59. 		printf("%d\r\n",num);
  60. 	} else {
  61. 		printf("err\r\n");
  62. 	}
  63. 	return 0;
  64. }
  65.  
Success #stdin #stdout 0s 2156KB
comments (?)
stdin 
Standard input is empty
stdout 
d6 is err
https://ideone.com/DcPhwm
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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