ref: 5ee2e8b13124750a58dc720afbc16d4d0a6f71f4
dir: /src/libc/string/memmove.c/
#include <string.h> #undef memmove void * memmove(void *s1, const void *s2, size_t n) { char *d = s1; const char *s = s2; if (d < s) { while (n-- > 0) *d++ = *s++; } else { s += n-1, d += n-1; while (n-- > 0) *d-- = *s--; } return s1; }