5 #define SS (sizeof(size_t))
6 #define ALIGN (sizeof(size_t)-1)
7 #define ONES ((size_t)-1/UCHAR_MAX)
9 void *memcpy(void *restrict dest, const void *restrict src, size_t n)
11 unsigned char *d = dest;
12 const unsigned char *s = src;
14 if (((uintptr_t)d & ALIGN) != ((uintptr_t)s & ALIGN))
17 for (; ((uintptr_t)d & ALIGN) && n; n--) *d++ = *s++;
19 size_t *wd = (void *)d;
20 const size_t *ws = (const void *)s;
22 for (; n>=SS; n-=SS) *wd++ = *ws++;
26 for (; n; n--) *d++ = *s++;