6 #define SS (sizeof(size_t))
7 #define ALIGN (sizeof(size_t)-1)
8 #define ONES ((size_t)-1/UCHAR_MAX)
10 void *memset(void *dest, int c, size_t n)
12 unsigned char *s = dest;
14 for (; ((uintptr_t)s & ALIGN) && n; n--) *s++ = c;
16 size_t *w, k = ONES * c;
17 for (w = (void *)s; n>=SS; n-=SS, w++) *w = k;
18 for (s = (void *)w; n; n--, s++) *s = c;