6 #define ALIGN (sizeof(size_t)-1)
7 #define ONES ((size_t)-1/UCHAR_MAX)
8 #define HIGHS (ONES * (UCHAR_MAX/2+1))
9 #define HASZERO(x) ((x)-ONES & ~(x) & HIGHS)
11 size_t strlcpy(char *d, const char *s, size_t n)
16 if (!n--) goto finish;
18 typedef size_t __attribute__((__may_alias__)) word;
20 if (((uintptr_t)s & ALIGN) == ((uintptr_t)d & ALIGN)) {
21 for (; ((uintptr_t)s & ALIGN) && n && (*d=*s); n--, s++, d++);
23 wd=(void *)d; ws=(const void *)s;
24 for (; n>=sizeof(size_t) && !HASZERO(*ws);
25 n-=sizeof(size_t), ws++, wd++) *wd = *ws;
26 d=(void *)wd; s=(const void *)ws;
30 for (; n && (*d=*s); n--, s++, d++);
33 return d-d0 + strlen(s);