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09a596cc2c
These machine-dependent inline string functions have never been on by default, and even if they were a good idea at the time they were introduced, they haven't really been touched in ten to fifteen years and probably aren't a good idea on current-gen processors. Current thinking is that this class of optimization is best left to the compiler. * bits/string.h, string/bits/string.h * sysdeps/aarch64/bits/string.h * sysdeps/m68k/m680x0/m68020/bits/string.h * sysdeps/s390/bits/string.h, sysdeps/sparc/bits/string.h * sysdeps/x86/bits/string.h: Delete file. * string/string.h: Don't include bits/string.h. * string/bits/string3.h: Rename to bits/string_fortified.h. No need to undef various symbols that the removed headers might have defined as macros. * string/Makefile (headers): Remove bits/string.h, change bits/string3.h to bits/string_fortified.h. * string/string-inlines.c: Update commentary. Remove definitions of various macros that nothing looks at anymore. Don't directly include bits/string.h. Set _STRING_INLINE_unaligned here, based on compiler-predefined macros. * string/strncat.c: If STRNCAT is not defined, or STRNCAT_PRIMARY _is_ defined, provide internal hidden alias __strncat. * include/string.h: Declare internal hidden alias __strncat. Only forward __stpcpy to __builtin_stpcpy if __NO_STRING_INLINES is not defined. * include/bits/string3.h: Rename to bits/string_fortified.h, update to match above. * sysdeps/i386/string-inlines.c: Define compat symbols for everything formerly defined by sysdeps/x86/bits/string.h. Make existing definitions into compat symbols as well. Remove some no-longer-necessary messing around with macros. * sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy.c * sysdeps/powerpc/powerpc64/multiarch/mempcpy.c * sysdeps/powerpc/powerpc64/multiarch/stpcpy.c * sysdeps/s390/multiarch/mempcpy.c No need to define _HAVE_STRING_ARCH_mempcpy. Do define __NO_STRING_INLINES and NO_MEMPCPY_STPCPY_REDIRECT. * sysdeps/i386/i686/multiarch/strncat-c.c * sysdeps/s390/multiarch/strncat-c.c * sysdeps/x86_64/multiarch/strncat-c.c Define STRNCAT_PRIMARY. Don't change definition of libc_hidden_def.
561 lines
14 KiB
C
561 lines
14 KiB
C
/* Copyright (C) 1999-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* This file contains compatibility definitions of functions that were
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formerly defined as "extern inline" in string.h; it's conceivable
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that old binaries contain references to them. */
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#define __NO_STRING_INLINES
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#include <string.h>
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#include "shlib-compat.h"
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#if SHLIB_COMPAT (libc, GLIBC_2_1_1, GLIBC_2_25)
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/* These functions were removed from string.h in glibc 2.25. */
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char *
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__old_strtok_r_1c (char *__s, char __sep, char **__nextp)
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{
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char *__result;
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if (__s == NULL)
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__s = *__nextp;
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while (*__s == __sep)
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++__s;
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__result = NULL;
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if (*__s != '\0')
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{
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__result = __s++;
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while (*__s != '\0')
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if (*__s++ == __sep)
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{
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__s[-1] = '\0';
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break;
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}
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}
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*__nextp = __s;
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return __result;
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}
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compat_symbol (libc, __old_strtok_r_1c, __strtok_r_1c, GLIBC_2_1_1);
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char *
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__old_strsep_1c (char **__s, char __reject)
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{
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char *__retval = *__s;
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if (__retval != NULL && (*__s = strchr (__retval, __reject)) != NULL)
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*(*__s)++ = '\0';
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return __retval;
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}
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compat_symbol (libc, __old_strsep_1c, __strsep_1c, GLIBC_2_1_1);
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char *
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__old_strsep_2c (char **__s, char __reject1, char __reject2)
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{
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char *__retval = *__s;
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if (__retval != NULL)
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{
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char *__cp = __retval;
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while (1)
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{
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if (*__cp == '\0')
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{
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__cp = NULL;
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break;
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}
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if (*__cp == __reject1 || *__cp == __reject2)
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{
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*__cp++ = '\0';
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break;
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}
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++__cp;
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}
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*__s = __cp;
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}
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return __retval;
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}
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compat_symbol (libc, __old_strsep_2c, __strsep_2c, GLIBC_2_1_1);
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char *
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__old_strsep_3c (char **__s, char __reject1, char __reject2, char __reject3)
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{
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char *__retval = *__s;
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if (__retval != NULL)
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{
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char *__cp = __retval;
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while (1)
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{
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if (*__cp == '\0')
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{
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__cp = NULL;
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break;
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}
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if (*__cp == __reject1 || *__cp == __reject2 || *__cp == __reject3)
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{
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*__cp++ = '\0';
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break;
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}
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++__cp;
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}
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*__s = __cp;
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}
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return __retval;
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}
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compat_symbol (libc, __old_strsep_3c, __strsep_3c, GLIBC_2_1_1);
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#endif
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#if SHLIB_COMPAT (libc, GLIBC_2_1_1, GLIBC_2_24)
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/* These functions were removed from string.h in glibc 2.24. */
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size_t
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__old_strcspn_c1 (const char *__s, int __reject)
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{
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size_t __result = 0;
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while (__s[__result] != '\0' && __s[__result] != __reject)
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++__result;
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return __result;
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}
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compat_symbol (libc, __old_strcspn_c1, __strcspn_c1, GLIBC_2_1_1);
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size_t
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__old_strcspn_c2 (const char *__s, int __reject1, int __reject2)
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{
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size_t __result = 0;
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while (__s[__result] != '\0' && __s[__result] != __reject1
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&& __s[__result] != __reject2)
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++__result;
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return __result;
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}
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compat_symbol (libc, __old_strcspn_c2, __strcspn_c2, GLIBC_2_1_1);
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size_t
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__old_strcspn_c3 (const char *__s, int __reject1, int __reject2,
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int __reject3)
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{
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size_t __result = 0;
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while (__s[__result] != '\0' && __s[__result] != __reject1
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&& __s[__result] != __reject2 && __s[__result] != __reject3)
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++__result;
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return __result;
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}
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compat_symbol (libc, __old_strcspn_c3, __strcspn_c3, GLIBC_2_1_1);
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size_t
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__old_strspn_c1 (const char *__s, int __accept)
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{
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size_t __result = 0;
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/* Please note that __accept never can be '\0'. */
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while (__s[__result] == __accept)
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++__result;
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return __result;
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}
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compat_symbol (libc, __old_strspn_c1, __strspn_c1, GLIBC_2_1_1);
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size_t
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__old_strspn_c2 (const char *__s, int __accept1, int __accept2)
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{
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size_t __result = 0;
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/* Please note that __accept1 and __accept2 never can be '\0'. */
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while (__s[__result] == __accept1 || __s[__result] == __accept2)
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++__result;
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return __result;
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}
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compat_symbol (libc, __old_strspn_c2, __strspn_c2, GLIBC_2_1_1);
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size_t
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__old_strspn_c3 (const char *__s, int __accept1, int __accept2,
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int __accept3)
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{
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size_t __result = 0;
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/* Please note that __accept1 to __accept3 never can be '\0'. */
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while (__s[__result] == __accept1 || __s[__result] == __accept2
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|| __s[__result] == __accept3)
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++__result;
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return __result;
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}
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compat_symbol (libc, __old_strspn_c3, __strspn_c3, GLIBC_2_1_1);
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char *
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__old_strpbrk_c2 (const char *__s, int __accept1, int __accept2)
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{
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/* Please note that __accept1 and __accept2 never can be '\0'. */
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while (*__s != '\0' && *__s != __accept1 && *__s != __accept2)
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++__s;
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return *__s == '\0' ? NULL : (char *) (size_t) __s;
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}
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compat_symbol (libc, __old_strpbrk_c2, __strpbrk_c2, GLIBC_2_1_1);
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char *
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__old_strpbrk_c3 (const char *__s, int __accept1, int __accept2, int __accept3)
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{
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/* Please note that __accept1 to __accept3 never can be '\0'. */
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while (*__s != '\0' && *__s != __accept1 && *__s != __accept2
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&& *__s != __accept3)
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++__s;
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return *__s == '\0' ? NULL : (char *) (size_t) __s;
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}
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compat_symbol (libc, __old_strpbrk_c3, __strpbrk_c3, GLIBC_2_1_1);
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# if defined __mc68020__ || defined __s390__ || defined __i386__
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# define _STRING_INLINE_unaligned 1
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# else
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# define _STRING_INLINE_unaligned 0
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/* These are a few types we need for the optimizations if we cannot
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use unaligned memory accesses. */
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# define __STRING2_COPY_TYPE(N) \
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typedef struct { unsigned char __arr[N]; } \
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__attribute__ ((__packed__)) __STRING2_COPY_ARR##N
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__STRING2_COPY_TYPE (2);
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__STRING2_COPY_TYPE (3);
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__STRING2_COPY_TYPE (4);
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__STRING2_COPY_TYPE (5);
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__STRING2_COPY_TYPE (6);
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__STRING2_COPY_TYPE (7);
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__STRING2_COPY_TYPE (8);
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# undef __STRING2_COPY_TYPE
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# endif
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# if _STRING_INLINE_unaligned
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void *
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__old_mempcpy_small (void *__dest1,
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char __src0_1, char __src2_1, char __src4_1, char __src6_1,
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__uint16_t __src0_2, __uint16_t __src4_2,
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__uint32_t __src0_4, __uint32_t __src4_4,
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size_t __srclen)
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{
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union {
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__uint32_t __ui;
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__uint16_t __usi;
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unsigned char __uc;
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unsigned char __c;
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} *__u = __dest1;
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switch ((unsigned int) __srclen)
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{
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case 1:
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__u->__c = __src0_1;
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__u = __extension__ ((void *) __u + 1);
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break;
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case 2:
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__u->__usi = __src0_2;
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__u = __extension__ ((void *) __u + 2);
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break;
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case 3:
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__u->__usi = __src0_2;
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__u = __extension__ ((void *) __u + 2);
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__u->__c = __src2_1;
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__u = __extension__ ((void *) __u + 1);
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break;
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case 4:
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__u->__ui = __src0_4;
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__u = __extension__ ((void *) __u + 4);
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break;
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case 5:
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__u->__ui = __src0_4;
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__u = __extension__ ((void *) __u + 4);
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__u->__c = __src4_1;
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__u = __extension__ ((void *) __u + 1);
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break;
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case 6:
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__u->__ui = __src0_4;
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__u = __extension__ ((void *) __u + 4);
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__u->__usi = __src4_2;
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__u = __extension__ ((void *) __u + 2);
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break;
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case 7:
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__u->__ui = __src0_4;
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__u = __extension__ ((void *) __u + 4);
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__u->__usi = __src4_2;
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__u = __extension__ ((void *) __u + 2);
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__u->__c = __src6_1;
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__u = __extension__ ((void *) __u + 1);
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break;
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case 8:
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__u->__ui = __src0_4;
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__u = __extension__ ((void *) __u + 4);
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__u->__ui = __src4_4;
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__u = __extension__ ((void *) __u + 4);
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break;
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}
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return (void *) __u;
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}
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# else
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void *
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__old_mempcpy_small (void *__dest, char __src1,
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__STRING2_COPY_ARR2 __src2, __STRING2_COPY_ARR3 __src3,
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__STRING2_COPY_ARR4 __src4, __STRING2_COPY_ARR5 __src5,
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__STRING2_COPY_ARR6 __src6, __STRING2_COPY_ARR7 __src7,
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__STRING2_COPY_ARR8 __src8, size_t __srclen)
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{
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union {
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char __c;
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__STRING2_COPY_ARR2 __sca2;
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__STRING2_COPY_ARR3 __sca3;
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__STRING2_COPY_ARR4 __sca4;
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__STRING2_COPY_ARR5 __sca5;
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__STRING2_COPY_ARR6 __sca6;
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__STRING2_COPY_ARR7 __sca7;
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__STRING2_COPY_ARR8 __sca8;
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} *__u = __dest;
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switch ((unsigned int) __srclen)
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{
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case 1:
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__u->__c = __src1;
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break;
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case 2:
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__extension__ __u->__sca2 = __src2;
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break;
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case 3:
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__extension__ __u->__sca3 = __src3;
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break;
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case 4:
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__extension__ __u->__sca4 = __src4;
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break;
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case 5:
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__extension__ __u->__sca5 = __src5;
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break;
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case 6:
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__extension__ __u->__sca6 = __src6;
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break;
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case 7:
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__extension__ __u->__sca7 = __src7;
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break;
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case 8:
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__extension__ __u->__sca8 = __src8;
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break;
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}
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return __extension__ ((void *) __u + __srclen);
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}
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# endif
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compat_symbol (libc, __old_mempcpy_small, __mempcpy_small, GLIBC_2_1_1);
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# if _STRING_INLINE_unaligned
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char *
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__old_strcpy_small (char *__dest,
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__uint16_t __src0_2, __uint16_t __src4_2,
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__uint32_t __src0_4, __uint32_t __src4_4,
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size_t __srclen)
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{
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union {
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__uint32_t __ui;
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__uint16_t __usi;
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unsigned char __uc;
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} *__u = (void *) __dest;
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switch ((unsigned int) __srclen)
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{
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case 1:
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__u->__uc = '\0';
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break;
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case 2:
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__u->__usi = __src0_2;
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break;
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case 3:
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__u->__usi = __src0_2;
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__u = __extension__ ((void *) __u + 2);
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__u->__uc = '\0';
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break;
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case 4:
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__u->__ui = __src0_4;
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break;
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case 5:
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__u->__ui = __src0_4;
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__u = __extension__ ((void *) __u + 4);
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__u->__uc = '\0';
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break;
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case 6:
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__u->__ui = __src0_4;
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__u = __extension__ ((void *) __u + 4);
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__u->__usi = __src4_2;
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break;
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case 7:
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__u->__ui = __src0_4;
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__u = __extension__ ((void *) __u + 4);
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__u->__usi = __src4_2;
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__u = __extension__ ((void *) __u + 2);
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__u->__uc = '\0';
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break;
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case 8:
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__u->__ui = __src0_4;
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__u = __extension__ ((void *) __u + 4);
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__u->__ui = __src4_4;
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break;
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}
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return __dest;
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}
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# else
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char *
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__old_strcpy_small (char *__dest,
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__STRING2_COPY_ARR2 __src2, __STRING2_COPY_ARR3 __src3,
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__STRING2_COPY_ARR4 __src4, __STRING2_COPY_ARR5 __src5,
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__STRING2_COPY_ARR6 __src6, __STRING2_COPY_ARR7 __src7,
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__STRING2_COPY_ARR8 __src8, size_t __srclen)
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{
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union {
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char __c;
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__STRING2_COPY_ARR2 __sca2;
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__STRING2_COPY_ARR3 __sca3;
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__STRING2_COPY_ARR4 __sca4;
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__STRING2_COPY_ARR5 __sca5;
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__STRING2_COPY_ARR6 __sca6;
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__STRING2_COPY_ARR7 __sca7;
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__STRING2_COPY_ARR8 __sca8;
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} *__u = (void *) __dest;
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switch ((unsigned int) __srclen)
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{
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case 1:
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__u->__c = '\0';
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break;
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case 2:
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__extension__ __u->__sca2 = __src2;
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break;
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case 3:
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__extension__ __u->__sca3 = __src3;
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break;
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case 4:
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__extension__ __u->__sca4 = __src4;
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break;
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case 5:
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__extension__ __u->__sca5 = __src5;
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break;
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case 6:
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__extension__ __u->__sca6 = __src6;
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break;
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case 7:
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__extension__ __u->__sca7 = __src7;
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break;
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case 8:
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__extension__ __u->__sca8 = __src8;
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break;
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}
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return __dest;
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}
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# endif
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compat_symbol (libc, __old_strcpy_small, __strcpy_small, GLIBC_2_1_1);
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# if _STRING_INLINE_unaligned
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|
char *
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|
__old_stpcpy_small (char *__dest,
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|
__uint16_t __src0_2, __uint16_t __src4_2,
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|
__uint32_t __src0_4, __uint32_t __src4_4,
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|
size_t __srclen)
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|
{
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|
union {
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|
unsigned int __ui;
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|
unsigned short int __usi;
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unsigned char __uc;
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|
char __c;
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|
} *__u = (void *) __dest;
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switch ((unsigned int) __srclen)
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|
{
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|
case 1:
|
|
__u->__uc = '\0';
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|
break;
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case 2:
|
|
__u->__usi = __src0_2;
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|
__u = __extension__ ((void *) __u + 1);
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|
break;
|
|
case 3:
|
|
__u->__usi = __src0_2;
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|
__u = __extension__ ((void *) __u + 2);
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|
__u->__uc = '\0';
|
|
break;
|
|
case 4:
|
|
__u->__ui = __src0_4;
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|
__u = __extension__ ((void *) __u + 3);
|
|
break;
|
|
case 5:
|
|
__u->__ui = __src0_4;
|
|
__u = __extension__ ((void *) __u + 4);
|
|
__u->__uc = '\0';
|
|
break;
|
|
case 6:
|
|
__u->__ui = __src0_4;
|
|
__u = __extension__ ((void *) __u + 4);
|
|
__u->__usi = __src4_2;
|
|
__u = __extension__ ((void *) __u + 1);
|
|
break;
|
|
case 7:
|
|
__u->__ui = __src0_4;
|
|
__u = __extension__ ((void *) __u + 4);
|
|
__u->__usi = __src4_2;
|
|
__u = __extension__ ((void *) __u + 2);
|
|
__u->__uc = '\0';
|
|
break;
|
|
case 8:
|
|
__u->__ui = __src0_4;
|
|
__u = __extension__ ((void *) __u + 4);
|
|
__u->__ui = __src4_4;
|
|
__u = __extension__ ((void *) __u + 3);
|
|
break;
|
|
}
|
|
return &__u->__c;
|
|
}
|
|
|
|
# else
|
|
|
|
char *
|
|
__old_stpcpy_small (char *__dest,
|
|
__STRING2_COPY_ARR2 __src2, __STRING2_COPY_ARR3 __src3,
|
|
__STRING2_COPY_ARR4 __src4, __STRING2_COPY_ARR5 __src5,
|
|
__STRING2_COPY_ARR6 __src6, __STRING2_COPY_ARR7 __src7,
|
|
__STRING2_COPY_ARR8 __src8, size_t __srclen)
|
|
{
|
|
union {
|
|
char __c;
|
|
__STRING2_COPY_ARR2 __sca2;
|
|
__STRING2_COPY_ARR3 __sca3;
|
|
__STRING2_COPY_ARR4 __sca4;
|
|
__STRING2_COPY_ARR5 __sca5;
|
|
__STRING2_COPY_ARR6 __sca6;
|
|
__STRING2_COPY_ARR7 __sca7;
|
|
__STRING2_COPY_ARR8 __sca8;
|
|
} *__u = (void *) __dest;
|
|
switch ((unsigned int) __srclen)
|
|
{
|
|
case 1:
|
|
__u->__c = '\0';
|
|
break;
|
|
case 2:
|
|
__extension__ __u->__sca2 = __src2;
|
|
break;
|
|
case 3:
|
|
__extension__ __u->__sca3 = __src3;
|
|
break;
|
|
case 4:
|
|
__extension__ __u->__sca4 = __src4;
|
|
break;
|
|
case 5:
|
|
__extension__ __u->__sca5 = __src5;
|
|
break;
|
|
case 6:
|
|
__extension__ __u->__sca6 = __src6;
|
|
break;
|
|
case 7:
|
|
__extension__ __u->__sca7 = __src7;
|
|
break;
|
|
case 8:
|
|
__extension__ __u->__sca8 = __src8;
|
|
break;
|
|
}
|
|
return __dest + __srclen - 1;
|
|
}
|
|
# endif
|
|
compat_symbol (libc, __old_stpcpy_small, __stpcpy_small, GLIBC_2_1_1);
|
|
|
|
#endif
|