#include <string.h>
-#include <stdlib.h>
#include <stdint.h>
#include <limits.h>
-#include "libc.h"
-#define ALIGN (sizeof(size_t)-1)
+#define ALIGN (sizeof(size_t))
#define ONES ((size_t)-1/UCHAR_MAX)
#define HIGHS (ONES * (UCHAR_MAX/2+1))
#define HASZERO(x) ((x)-ONES & ~(x) & HIGHS)
char *__stpcpy(char *restrict d, const char *restrict s)
{
- size_t *wd;
- const size_t *ws;
-
- if (((uintptr_t)s & ALIGN) == ((uintptr_t)d & ALIGN)) {
- for (; (*d=*s) && ((uintptr_t)s & ALIGN); s++, d++);
- if (!*s) return d;
+#ifdef __GNUC__
+ typedef size_t __attribute__((__may_alias__)) word;
+ word *wd;
+ const word *ws;
+ if ((uintptr_t)s % ALIGN == (uintptr_t)d % ALIGN) {
+ for (; (uintptr_t)s % ALIGN; s++, d++)
+ if (!(*d=*s)) return d;
wd=(void *)d; ws=(const void *)s;
for (; !HASZERO(*ws); *wd++ = *ws++);
d=(void *)wd; s=(const void *)ws;
}
+#endif
for (; (*d=*s); s++, d++);
return d;