#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

enum handling {
	PERROR,
	FPRINTF,
	IGNORE,
	HANDLING_INVALID
};

struct func_handling {
	const char      *name;
	enum handling   handling;
};

struct func_handling null_functions [] = {
	{ "fopen",	PERROR	},
	{ "malloc",	PERROR	},
	{ }
};

struct func_handling nonzero_functions [] = {
	{ "fclose",	FPRINTF	},
	{ }
};

static void
handle_error(struct func_handling *functions, const char *action)
{
	assert(functions != NULL);
	assert(action != NULL);

	while (functions->name) {
		size_t len = strlen(functions->name);
		if (!strncmp(functions->name, action, len)) {
			switch (functions->handling) {
			case PERROR:
				perror(action);
				break;
			case FPRINTF:
				fprintf(stderr, "%s failed\n", action);
				break;
			case IGNORE:
				return;
			default:
				break;
			}
			exit(1);
		}
		functions++;
	}
}

#define check_null(action)						\
	do {								\
		void *ptr = (action);					\
		if (ptr == NULL)					\
			handle_error(null_functions, #action);		\
	} while (0)

#define check_nonzero(action)						\
	do {								\
		int ret = (action);					\
		if (ret != 0)						\
			handle_nonzero(nonzero_functions, #action);	\
	} while (0)

int
main(void)
{
    check_null(fopen("subor", "r"));

    return 0;
}