#include "config.h"

#include <assert.h>
#include <errno.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>

#include "math.h"


int
add_size(const size_t x, const size_t y, size_t *const out) {
	int rc = EOVERFLOW;

	const bool overflows = (SIZE_MAX - x) < y;
	if (overflows) {
		goto out;
	}

	*out = x + y;
	rc = 0;
out:
	return rc;
}

int
mul_size(const size_t x, const size_t y, size_t *const out) {
	int rc = EOVERFLOW;

	assert(x != 0U);
	assert(y != 0U);

	const bool overflows = x > (SIZE_MAX / y);
	if (overflows) {
		goto out;
	}

	*out = x * y;
	rc = 0;
out:
	return rc;
}