memmove - copy region of memory
Standard C Library (libc, -lc)
#include <string.h>
void *
memmove(void *dest,
const void *src, size_t len);
The block of memory beginning at src, of length len, is copied to dest. dest must point to a region large enough to hold it.
Unlike memcpy, memmove is guaranteed to operate correctly if src and dest overlap.
memmove returns dest.