| #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) |
| char *__strchrnul(const char *s, int c) |
| { |
| c = (unsigned char)c; |
| if (!c) return (char *)s + strlen(s); |
| |
| #ifdef __GNUC__ |
| typedef size_t __attribute__((__may_alias__)) word; |
| const word *w; |
| for (; (uintptr_t)s % ALIGN; s++) |
| if (!*s || *(unsigned char *)s == c) return (char *)s; |
| size_t k = ONES * c; |
| for (w = (void *)s; !HASZERO(*w) && !HASZERO(*w^k); w++); |
| s = (void *)w; |
| #endif |
| for (; *s && *(unsigned char *)s != c; s++); |
| return (char *)s; |
| } |
| |
| weak_alias(__strchrnul, strchrnul); |