diff options
Diffstat (limited to 'string')
| -rw-r--r-- | string/Versions | 2 | ||||
| -rw-r--r-- | string/bits/string2.h | 73 | ||||
| -rw-r--r-- | string/strcspn.c | 46 | ||||
| -rw-r--r-- | string/string-inlines.c | 40 |
4 files changed, 83 insertions, 78 deletions
diff --git a/string/Versions b/string/Versions index 59bf35a3bd..475c1fdb64 100644 --- a/string/Versions +++ b/string/Versions @@ -80,4 +80,6 @@ libc { GLIBC_2.6 { strerror_l; } + GLIBC_2.24 { + } } diff --git a/string/bits/string2.h b/string/bits/string2.h index 8200ef173d..a8df0db14a 100644 --- a/string/bits/string2.h +++ b/string/bits/string2.h @@ -905,77 +905,10 @@ __stpcpy_small (char *__dest, /* Return the length of the initial segment of S which consists entirely of characters not in REJECT. */ -#if !defined _HAVE_STRING_ARCH_strcspn || defined _FORCE_INLINES -# ifndef _HAVE_STRING_ARCH_strcspn -# if __GNUC_PREREQ (3, 2) -# define strcspn(s, reject) \ - __extension__ \ - ({ char __r0, __r1, __r2; \ - (__builtin_constant_p (reject) && __string2_1bptr_p (reject) \ - ? ((__builtin_constant_p (s) && __string2_1bptr_p (s)) \ - ? __builtin_strcspn (s, reject) \ - : ((__r0 = ((const char *) (reject))[0], __r0 == '\0') \ - ? strlen (s) \ - : ((__r1 = ((const char *) (reject))[1], __r1 == '\0') \ - ? __strcspn_c1 (s, __r0) \ - : ((__r2 = ((const char *) (reject))[2], __r2 == '\0') \ - ? __strcspn_c2 (s, __r0, __r1) \ - : (((const char *) (reject))[3] == '\0' \ - ? __strcspn_c3 (s, __r0, __r1, __r2) \ - : __builtin_strcspn (s, reject)))))) \ - : __builtin_strcspn (s, reject)); }) -# else -# define strcspn(s, reject) \ - __extension__ \ - ({ char __r0, __r1, __r2; \ - (__builtin_constant_p (reject) && __string2_1bptr_p (reject) \ - ? ((__r0 = ((const char *) (reject))[0], __r0 == '\0') \ - ? strlen (s) \ - : ((__r1 = ((const char *) (reject))[1], __r1 == '\0') \ - ? __strcspn_c1 (s, __r0) \ - : ((__r2 = ((const char *) (reject))[2], __r2 == '\0') \ - ? __strcspn_c2 (s, __r0, __r1) \ - : (((const char *) (reject))[3] == '\0' \ - ? __strcspn_c3 (s, __r0, __r1, __r2) \ - : strcspn (s, reject))))) \ - : strcspn (s, reject)); }) -# endif +#ifndef _HAVE_STRING_ARCH_strcspn +# if __GNUC_PREREQ (3, 2) +# define strcspn(s, reject) __builtin_strcspn (s, reject) # endif - -__STRING_INLINE size_t __strcspn_c1 (const char *__s, int __reject); -__STRING_INLINE size_t -__strcspn_c1 (const char *__s, int __reject) -{ - size_t __result = 0; - while (__s[__result] != '\0' && __s[__result] != __reject) - ++__result; - return __result; -} - -__STRING_INLINE size_t __strcspn_c2 (const char *__s, int __reject1, - int __reject2); -__STRING_INLINE size_t -__strcspn_c2 (const char *__s, int __reject1, int __reject2) -{ - size_t __result = 0; - while (__s[__result] != '\0' && __s[__result] != __reject1 - && __s[__result] != __reject2) - ++__result; - return __result; -} - -__STRING_INLINE size_t __strcspn_c3 (const char *__s, int __reject1, - int __reject2, int __reject3); -__STRING_INLINE size_t -__strcspn_c3 (const char *__s, int __reject1, int __reject2, - int __reject3) -{ - size_t __result = 0; - while (__s[__result] != '\0' && __s[__result] != __reject1 - && __s[__result] != __reject2 && __s[__result] != __reject3) - ++__result; - return __result; -} #endif diff --git a/string/strcspn.c b/string/strcspn.c index 8888919639..c535dd1c3d 100644 --- a/string/strcspn.c +++ b/string/strcspn.c @@ -16,6 +16,7 @@ <http://www.gnu.org/licenses/>. */ #include <string.h> +#include <stdint.h> #undef strcspn @@ -26,16 +27,45 @@ /* Return the length of the maximum initial segment of S which contains no characters from REJECT. */ size_t -STRCSPN (const char *s, const char *reject) +STRCSPN (const char *str, const char *reject) { - size_t count = 0; + if (__glibc_unlikely (reject[0] == '\0') || + __glibc_unlikely (reject[1] == '\0')) + return __strchrnul (str, reject [0]) - str; - while (*s != '\0') - if (strchr (reject, *s++) == NULL) - ++count; - else - return count; + /* Use multiple small memsets to enable inlining on most targets. */ + unsigned char table[256]; + unsigned char *p = memset (table, 0, 64); + memset (p + 64, 0, 64); + memset (p + 128, 0, 64); + memset (p + 192, 0, 64); - return count; + unsigned char *s = (unsigned char*) reject; + unsigned char tmp; + do + p[tmp = *s++] = 1; + while (tmp); + + s = (unsigned char*) str; + if (p[s[0]]) return 0; + if (p[s[1]]) return 1; + if (p[s[2]]) return 2; + if (p[s[3]]) return 3; + + s = (unsigned char *) ((uintptr_t)(s) & ~3); + + unsigned int c0, c1, c2, c3; + do + { + s += 4; + c0 = p[s[0]]; + c1 = p[s[1]]; + c2 = p[s[2]]; + c3 = p[s[3]]; + } + while ((c0 | c1 | c2 | c3) == 0); + + size_t count = s - (unsigned char *) str; + return (c0 | c1) != 0 ? count - c0 + 1 : count - c2 + 3; } libc_hidden_builtin_def (strcspn) diff --git a/string/string-inlines.c b/string/string-inlines.c index 16db3ea308..83bdd6c185 100644 --- a/string/string-inlines.c +++ b/string/string-inlines.c @@ -32,3 +32,43 @@ #undef __NO_INLINE__ #include <bits/string.h> #include <bits/string2.h> + +#include "shlib-compat.h" + +#if SHLIB_COMPAT (libc, GLIBC_2_1_1, GLIBC_2_24) +/* The inline functions are not used from GLIBC 2.24 and forward, however + they are required to provide the symbols through string-inlines.c + (if inlining is not possible for compatibility reasons). */ +size_t +__old_strcspn_c1 (const char *__s, int __reject) +{ + size_t __result = 0; + while (__s[__result] != '\0' && __s[__result] != __reject) + ++__result; + return __result; +} +compat_symbol (libc, __old_strcspn_c1, __strcspn_c1, GLIBC_2_1_1); + +size_t +__old_strcspn_c2 (const char *__s, int __reject1, int __reject2) +{ + size_t __result = 0; + while (__s[__result] != '\0' && __s[__result] != __reject1 + && __s[__result] != __reject2) + ++__result; + return __result; +} +compat_symbol (libc, __old_strcspn_c2, __strcspn_c2, GLIBC_2_1_1); + +size_t +__old_strcspn_c3 (const char *__s, int __reject1, int __reject2, + int __reject3) +{ + size_t __result = 0; + while (__s[__result] != '\0' && __s[__result] != __reject1 + && __s[__result] != __reject2 && __s[__result] != __reject3) + ++__result; + return __result; +} +compat_symbol (libc, __old_strcspn_c3, __strcspn_c3, GLIBC_2_1_1); +#endif |