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  1. #include <stdio.h>
  2.  
  3. typedef int (*fnptr_t)(int a, int b);
  4.  
  5. typedef struct named_ptr {
  6. 	fnptr_t ptr;
  7. 	const char *name;
  8. } named_ptr;
  9.  
  10. named_ptr make_named_ptr(fnptr_t ptr, const char *name) {
  11. 	named_ptr p = {ptr, name};
  12. 	return p;
  13. }
  14. #define MAKE_NAMED_PTR(x) make_named_ptr(x, #x)
  15.  
  16. typedef struct cgi_object_t {
  17.     char *path;
  18.     int grp, r_vdom, r_global;
  19.     named_ptr act;
  20.     int flags; 
  21. } cgi_object_t;
  22.  
  23. enum dummy {ACC_GRP_ML, VDOM_PER_VDOM, API_FLAG_NO_SCHEMA};
  24. int cgi_ml_schema(int a, int b) { return 0; }
  25. int cgi_ml_policy_svmattacktypes_get(int a, int b) { return 0; }
  26.  
  27. int main(void) 
  28. {
  29. 	cgi_object_t cgi_machine_learning_handlers[] = {
  30. 		{
  31. 		    .path = "schema",
  32. 		    .grp = ACC_GRP_ML,  
  33. 		    .r_vdom = VDOM_PER_VDOM,
  34. 		    .r_global = VDOM_PER_VDOM,
  35. 		    .act = MAKE_NAMED_PTR(cgi_ml_schema),
  36. 		    .flags = API_FLAG_NO_SCHEMA, 
  37. 		},
  38. 		{
  39. 		    .path = "policy.svmattacktypes",
  40. 		    .grp = ACC_GRP_ML,  
  41. 		    .r_vdom = VDOM_PER_VDOM,
  42. 		    .r_global = VDOM_PER_VDOM,
  43. 		    .act = MAKE_NAMED_PTR(cgi_ml_policy_svmattacktypes_get),
  44. 		    .flags = API_FLAG_NO_SCHEMA, 
  45. 		}
  46. 	};
  47.  
  48. 	for (size_t i = 0; i < 2; ++i) {
  49. 		cgi_object_t *m = cgi_machine_learning_handlers + i;
  50. 		printf("%s is at address %p\n", m->act.name, m->act.ptr);
  51. 	}
  52.  
  53. 	return 0;
  54. }
  55.  
Success #stdin #stdout 0s 5536KB
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cgi_ml_schema is at address 0x55cde55ef190
cgi_ml_policy_svmattacktypes_get is at address 0x55cde55ef1a0
https://ideone.com/YXHaNO
Named pointers in C
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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