The memmove function copies len bytes from src to dest. If these memory buffers overlap, the memmove function ensures that bytes in src are copied to dest before being overwritten.

The memmove function returns dest.

memccpy, memchr, memcmp, memcpy, memset

#include <string.h>
#include <stdio.h> /* for printf */

void tst_memmove (void) {
  static char buf [] = "This is line 1 "
                       "This is line 2 "
                       "This is line 3 ";

  printf ("buf before = %s\n", buf);
  memmove (&buf [0], &buf [16], 32);
  printf ("buf after = %s\n", buf);
}