Checking if two arrays are equal - C

Question

How would I go about checking the equality of two arrays using memcmp?

bool array_is_equal(const void *array_one, void *array_two, const size_t elem_size, const size_t elem_count)

I have something like this:

int i;
for(i = 0; i < elem_count; i++){
    if(memcmp(array_one, array_two, elem_size) == 0) {
        return true;
    }
    i++;
 }

return false;

with elem_size being the number of bytes each array element uses in array one

Answer 1

If all you care about is binary equality of two array objects, then you don't even need a cycle

bool array_is_equal(const void *array_one, void *array_two, 
                    const size_t elem_size, const size_t elem_count)
{
  return memcmp(array_one, array_two, elem_count * elem_size) == 0;
}

It is not clear though why array array_two is suddenly non-const (while array array_one is const). And there's not much point in declaring elem_size and elem_count as const (aside from fairly cosmetic considerations).