diff options
Diffstat (limited to 'sysdeps/i386/i486/bits')
| -rw-r--r-- | sysdeps/i386/i486/bits/string.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/sysdeps/i386/i486/bits/string.h b/sysdeps/i386/i486/bits/string.h index 6e5c3fed1f..cb0229b5cd 100644 --- a/sysdeps/i386/i486/bits/string.h +++ b/sysdeps/i386/i486/bits/string.h @@ -1056,6 +1056,66 @@ __strchr_g (__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_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__ + ("1:\n\t" + "movb (%0),%%al\n\t" + "cmpb %%ah,%%al\n\t" + "je 2f\n\t" + "leal 1(%0),%0\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n\t" + "decl %0\n" + "2:" + : "=r" (__res), "=&a" (__d0) + : "0" (__s), "1" (__c) + : "cc"); + return __res; +} + +__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__ + ("movb %%al,%%ah\n" + "1:\n\t" + "movb (%0),%%al\n\t" + "cmpb %%ah,%%al\n\t" + "je 2f\n\t" + "leal 1(%0),%0\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n\t" + "decl %0\n" + "2:" + : "=r" (__res), "=&a" (__d0) + : "0" (__s), "1" (__c) + : "cc"); + return __res; +} +#ifdef __USE_GNU +# define strchrnul(s, c) __strchrnul (s, c) +#endif + + #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED /* Find the first occurrence of C in S. This is the BSD name. */ # define _HAVE_STRING_ARCH_index 1 |