Function memmove

stdlib/cpp/utility.hpp:7–20

Custom memmove

// Custom memmove
void* memmove(void* dest, const void* src, std::size_t n) {
    char* csrc = (char*)src;
    char* cdest = (char*)dest;
    if (csrc < cdest) {
        for (std::size_t i = n; i > 0; i--) {
            cdest[i - 1] = csrc[i - 1];
        }
    } else {
        for (std::size_t i = 0; i < n; i++) {
            cdest[i] = csrc[i];
        }
    }
    return dest;
}

namespace std {
    // make std::move using memmove (3 arguments, specific use case)