ref: 051a76e14d0004c2646546c79792f4536f6218d7
dir: /lib/c/src/memmove.c/
#include <string.h> #undef memmove void * memmove(void *dst, const void *src, size_t n) { char *d = dst, *s = (char *) src; if (d < s) { while (n-- > 0) *d++ = *s++; } else { s += n-1, d += n-1; while (n-- > 0) *d-- = *s--; } return dst; }