diff options
Diffstat (limited to 'sysdeps/i386/bits/string.h')
| -rw-r--r-- | sysdeps/i386/bits/string.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/sysdeps/i386/bits/string.h b/sysdeps/i386/bits/string.h index 4bd65af..5a67c1b 100644 --- a/sysdeps/i386/bits/string.h +++ b/sysdeps/i386/bits/string.h @@ -517,6 +517,66 @@ __strchr_c (__const char *__s, int __c) } +/* Find the first occurrence of C in S or the final NUL byte. */ +#define _HAVE_STRING_ARCH_strchrnul 1 +#define __strchrnul(s, c) \ + (__extension__ (__builtin_constant_p (c) \ + ? ((c) == '\0' \ + ? (char *) __rawmemchr (s, c) \ + : __strchrnul_c (s, ((c) & 0xff) << 8)) \ + : __strchrnul_g (s, c))) + +__STRING_INLINE char *__strchrnul_g (__const char *__s, int __c); + +__STRING_INLINE char * +__strchrnul_g (__const char *__s, int __c) +{ + register unsigned long int __d0; + register char *__res; + __asm__ __volatile__ + ("cld\n\t" + "movb %%al,%%ah\n" + "1:\n\t" + "lodsb\n\t" + "cmpb %%ah,%%al\n\t" + "je 2f\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n\t" + "2:\n\t" + "movl %1,%0" + : "=a" (__res), "=&S" (__d0) + : "0" (__c), "1" (__s) + : "cc"); + return __res - 1; +} + +__STRING_INLINE char *__strchrnul_c (__const char *__s, int __c); + +__STRING_INLINE char * +__strchrnul_c (__const char *__s, int __c) +{ + register unsigned long int __d0; + register char *__res; + __asm__ __volatile__ + ("cld\n\t" + "1:\n\t" + "lodsb\n\t" + "cmpb %%ah,%%al\n\t" + "je 2f\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n\t" + "2:\n\t" + "movl %1,%0" + : "=a" (__res), "=&S" (__d0) + : "0" (__c), "1" (__s) + : "cc"); + return __res - 1; +} +#ifdef __USE_GNU +# define strchrnul(s, c) __strchrnul (s, c) +#endif + + /* Return the length of the initial segment of S which consists entirely of characters not in REJECT. */ #define _HAVE_STRING_ARCH_strcspn 1 |