| #include <string.h> |
| #include <stdint.h> |
| #include <limits.h> |
| |
| #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) |
| |
| #if defined(USE_COBALT_CUSTOMIZATIONS) |
| #ifdef __GNUC__ |
| __attribute__((no_sanitize("address"))) |
| #endif // __GNUC__ |
| #endif // defined(USE_COBALT_CUSTOMIZATIONS) |
| size_t strlen(const char *s) |
| { |
| const char *a = s; |
| #ifdef __GNUC__ |
| typedef size_t __attribute__((__may_alias__)) word; |
| const word *w; |
| for (; (uintptr_t)s % ALIGN; s++) if (!*s) return s-a; |
| for (w = (const void *)s; !HASZERO(*w); w++); |
| s = (const void *)w; |
| #endif |
| for (; *s; s++); |
| return s-a; |
| } |
