mirror of
https://sourceware.org/git/glibc.git
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487890009e
This patch implements support for the __STDC_WANT_LIB_EXT2__ feature test macro from ISO/IEC TR 24731-2:2010, thereby implementing one possible approach for supporting ISO C feature test macros. Recall that, as described in <https://sourceware.org/ml/libc-alpha/2016-05/msg00486.html>, these macros work based on the definition when affected headers are included, so cannot be handled once when the first system header is included because that might not be one of the headers the particular macro in question affects. <https://sourceware.org/ml/libc-alpha/2016-05/msg00680.html> expresses views on possible approaches for implementation and <https://sourceware.org/ml/libc-alpha/2016-06/msg00039.html> follows up on that. This patch arranges things so that the relevant condition is __GLIBC_USE (LIB_EXT2), following one of the suggestions given. Headers using these macros include <bits/libc-header-start.h>, which in turn includes <features.h>. Headers must define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION before including <bits/libc-header-start.h>, to discourage inclusion outside glibc as requested. __USE_GNU conditions on affected functions are changed to __GLIBC_USE (LIB_EXT2), while it's added as an additional alternative on the conditions for functions already enabled for some POSIX versions. It would be possible to convert existing __USE_* conditionals to __GLIBC_USE (with the relevant __GLIBC_USE_* being defined in <features.h> where __USE_* are presently defined), and so make them typo-proof (given -Wundef -Werror in glibc builds) because __GLIBC_USE is used with #if not #ifdef / #if defined. No attempt is made to enforce the rule about diagnosing different definitions of __STDC_WANT_LIB_EXT2__ when affected headers are included; such a diagnostic is incompatible with multiple-include guards on the affected headers, unless compiler extensions are added to support it. As previously noted, glibc does not implement all features from TR 24731-2:2010: the functions aswprintf vaswprintf getwdelim getwline are not in glibc, although they would be appropriate to add if someone wished to do so. But I think it makes sense to support the feature test macro if *any* of the controlled features are present in glibc. Tested for x86_64 and x86 (testsuite, and that installed stripped shared libraries are unchanged by the patch). * bits/libc-header-start.h: New file. * Makefile (headers): Add bits/libc-header-start.h. * include/features.h (__STDC_WANT_LIB_EXT2__): Document. (__GLIBC_USE): New macro. * libio/stdio.h: Define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include <bits/libc-header-start.h> instead of including <features.h>. (fmemopen): Declare also if [__GLIBC_USE (LIB_EXT2)]. (open_memstream): Likewise. (vasprintf): Declare if [__GLIBC_USE (LIB_EXT2)], not [__USE_GNU]. (__asprintf): Likewise. (asprintf): Likewise. (__getdelim): Declare also if [__GLIBC_USE (LIB_EXT2)]. (getdelim): Likewise. (getline): Likewise. * string/string.h: Define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include <bits/libc-header-start.h> instead of including <features.h>. (strdup): Declare also if [__GLIBC_USE (LIB_EXT2)] (strndup): Likewise. * wcsmbs/wchar.h: Define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include <bits/libc-header-start.h> instead of including <features.h>. (open_wmemstream): Declare also if [__GLIBC_USE (LIB_EXT2)]. * manual/creature.texi (__STDC_WANT_LIB_EXT2__): Document macro.
661 lines
22 KiB
C
661 lines
22 KiB
C
/* Copyright (C) 1991-2016 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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/*
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* ISO C99 Standard: 7.21 String handling <string.h>
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*/
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#ifndef _STRING_H
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#define _STRING_H 1
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#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
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#include <bits/libc-header-start.h>
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__BEGIN_DECLS
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/* Get size_t and NULL from <stddef.h>. */
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#define __need_size_t
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#define __need_NULL
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#include <stddef.h>
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/* Tell the caller that we provide correct C++ prototypes. */
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#if defined __cplusplus && __GNUC_PREREQ (4, 4)
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# define __CORRECT_ISO_CPP_STRING_H_PROTO
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#endif
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__BEGIN_NAMESPACE_STD
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/* Copy N bytes of SRC to DEST. */
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extern void *memcpy (void *__restrict __dest, const void *__restrict __src,
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size_t __n) __THROW __nonnull ((1, 2));
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/* Copy N bytes of SRC to DEST, guaranteeing
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correct behavior for overlapping strings. */
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extern void *memmove (void *__dest, const void *__src, size_t __n)
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__THROW __nonnull ((1, 2));
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__END_NAMESPACE_STD
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/* Copy no more than N bytes of SRC to DEST, stopping when C is found.
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Return the position in DEST one byte past where C was copied,
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or NULL if C was not found in the first N bytes of SRC. */
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#if defined __USE_MISC || defined __USE_XOPEN
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extern void *memccpy (void *__restrict __dest, const void *__restrict __src,
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int __c, size_t __n)
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__THROW __nonnull ((1, 2));
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#endif /* Misc || X/Open. */
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__BEGIN_NAMESPACE_STD
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/* Set N bytes of S to C. */
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extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1));
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/* Compare N bytes of S1 and S2. */
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extern int memcmp (const void *__s1, const void *__s2, size_t __n)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Search N bytes of S for C. */
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#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++"
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{
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extern void *memchr (void *__s, int __c, size_t __n)
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__THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
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extern const void *memchr (const void *__s, int __c, size_t __n)
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__THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
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# ifdef __OPTIMIZE__
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__extern_always_inline void *
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memchr (void *__s, int __c, size_t __n) __THROW
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{
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return __builtin_memchr (__s, __c, __n);
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}
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__extern_always_inline const void *
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memchr (const void *__s, int __c, size_t __n) __THROW
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{
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return __builtin_memchr (__s, __c, __n);
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}
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# endif
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}
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#else
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extern void *memchr (const void *__s, int __c, size_t __n)
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__THROW __attribute_pure__ __nonnull ((1));
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#endif
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__END_NAMESPACE_STD
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#ifdef __USE_GNU
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/* Search in S for C. This is similar to `memchr' but there is no
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length limit. */
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# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++" void *rawmemchr (void *__s, int __c)
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__THROW __asm ("rawmemchr") __attribute_pure__ __nonnull ((1));
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extern "C++" const void *rawmemchr (const void *__s, int __c)
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__THROW __asm ("rawmemchr") __attribute_pure__ __nonnull ((1));
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# else
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extern void *rawmemchr (const void *__s, int __c)
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__THROW __attribute_pure__ __nonnull ((1));
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# endif
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/* Search N bytes of S for the final occurrence of C. */
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# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++" void *memrchr (void *__s, int __c, size_t __n)
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__THROW __asm ("memrchr") __attribute_pure__ __nonnull ((1));
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extern "C++" const void *memrchr (const void *__s, int __c, size_t __n)
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__THROW __asm ("memrchr") __attribute_pure__ __nonnull ((1));
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# else
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extern void *memrchr (const void *__s, int __c, size_t __n)
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__THROW __attribute_pure__ __nonnull ((1));
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# endif
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#endif
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__BEGIN_NAMESPACE_STD
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/* Copy SRC to DEST. */
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extern char *strcpy (char *__restrict __dest, const char *__restrict __src)
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__THROW __nonnull ((1, 2));
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/* Copy no more than N characters of SRC to DEST. */
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extern char *strncpy (char *__restrict __dest,
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const char *__restrict __src, size_t __n)
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__THROW __nonnull ((1, 2));
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/* Append SRC onto DEST. */
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extern char *strcat (char *__restrict __dest, const char *__restrict __src)
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__THROW __nonnull ((1, 2));
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/* Append no more than N characters from SRC onto DEST. */
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extern char *strncat (char *__restrict __dest, const char *__restrict __src,
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size_t __n) __THROW __nonnull ((1, 2));
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/* Compare S1 and S2. */
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extern int strcmp (const char *__s1, const char *__s2)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Compare N characters of S1 and S2. */
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extern int strncmp (const char *__s1, const char *__s2, size_t __n)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Compare the collated forms of S1 and S2. */
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extern int strcoll (const char *__s1, const char *__s2)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Put a transformation of SRC into no more than N bytes of DEST. */
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extern size_t strxfrm (char *__restrict __dest,
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const char *__restrict __src, size_t __n)
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__THROW __nonnull ((2));
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__END_NAMESPACE_STD
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#ifdef __USE_XOPEN2K8
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/* The following functions are equivalent to the both above but they
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take the locale they use for the collation as an extra argument.
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This is not standardsized but something like will come. */
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# include <xlocale.h>
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/* Compare the collated forms of S1 and S2 using rules from L. */
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extern int strcoll_l (const char *__s1, const char *__s2, __locale_t __l)
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__THROW __attribute_pure__ __nonnull ((1, 2, 3));
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/* Put a transformation of SRC into no more than N bytes of DEST. */
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extern size_t strxfrm_l (char *__dest, const char *__src, size_t __n,
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__locale_t __l) __THROW __nonnull ((2, 4));
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#endif
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#if (defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 \
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|| __GLIBC_USE (LIB_EXT2))
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/* Duplicate S, returning an identical malloc'd string. */
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extern char *strdup (const char *__s)
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__THROW __attribute_malloc__ __nonnull ((1));
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#endif
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/* Return a malloc'd copy of at most N bytes of STRING. The
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resultant string is terminated even if no null terminator
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appears before STRING[N]. */
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#if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
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extern char *strndup (const char *__string, size_t __n)
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__THROW __attribute_malloc__ __nonnull ((1));
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#endif
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#if defined __USE_GNU && defined __GNUC__
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/* Duplicate S, returning an identical alloca'd string. */
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# define strdupa(s) \
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(__extension__ \
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({ \
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const char *__old = (s); \
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size_t __len = strlen (__old) + 1; \
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char *__new = (char *) __builtin_alloca (__len); \
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(char *) memcpy (__new, __old, __len); \
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}))
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/* Return an alloca'd copy of at most N bytes of string. */
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# define strndupa(s, n) \
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(__extension__ \
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({ \
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const char *__old = (s); \
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size_t __len = strnlen (__old, (n)); \
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char *__new = (char *) __builtin_alloca (__len + 1); \
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__new[__len] = '\0'; \
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(char *) memcpy (__new, __old, __len); \
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}))
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#endif
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__BEGIN_NAMESPACE_STD
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/* Find the first occurrence of C in S. */
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#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++"
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{
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extern char *strchr (char *__s, int __c)
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__THROW __asm ("strchr") __attribute_pure__ __nonnull ((1));
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extern const char *strchr (const char *__s, int __c)
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__THROW __asm ("strchr") __attribute_pure__ __nonnull ((1));
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# ifdef __OPTIMIZE__
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__extern_always_inline char *
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strchr (char *__s, int __c) __THROW
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{
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return __builtin_strchr (__s, __c);
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}
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__extern_always_inline const char *
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strchr (const char *__s, int __c) __THROW
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{
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return __builtin_strchr (__s, __c);
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}
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# endif
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}
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#else
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extern char *strchr (const char *__s, int __c)
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__THROW __attribute_pure__ __nonnull ((1));
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#endif
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/* Find the last occurrence of C in S. */
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#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++"
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{
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extern char *strrchr (char *__s, int __c)
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__THROW __asm ("strrchr") __attribute_pure__ __nonnull ((1));
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extern const char *strrchr (const char *__s, int __c)
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__THROW __asm ("strrchr") __attribute_pure__ __nonnull ((1));
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# ifdef __OPTIMIZE__
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__extern_always_inline char *
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strrchr (char *__s, int __c) __THROW
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{
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return __builtin_strrchr (__s, __c);
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}
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__extern_always_inline const char *
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strrchr (const char *__s, int __c) __THROW
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{
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return __builtin_strrchr (__s, __c);
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}
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# endif
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}
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#else
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extern char *strrchr (const char *__s, int __c)
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__THROW __attribute_pure__ __nonnull ((1));
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#endif
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__END_NAMESPACE_STD
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#ifdef __USE_GNU
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/* This function is similar to `strchr'. But it returns a pointer to
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the closing NUL byte in case C is not found in S. */
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# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++" char *strchrnul (char *__s, int __c)
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__THROW __asm ("strchrnul") __attribute_pure__ __nonnull ((1));
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extern "C++" const char *strchrnul (const char *__s, int __c)
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__THROW __asm ("strchrnul") __attribute_pure__ __nonnull ((1));
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# else
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extern char *strchrnul (const char *__s, int __c)
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__THROW __attribute_pure__ __nonnull ((1));
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# endif
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#endif
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__BEGIN_NAMESPACE_STD
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/* Return the length of the initial segment of S which
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consists entirely of characters not in REJECT. */
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extern size_t strcspn (const char *__s, const char *__reject)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Return the length of the initial segment of S which
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consists entirely of characters in ACCEPT. */
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extern size_t strspn (const char *__s, const char *__accept)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Find the first occurrence in S of any character in ACCEPT. */
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#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++"
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{
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extern char *strpbrk (char *__s, const char *__accept)
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__THROW __asm ("strpbrk") __attribute_pure__ __nonnull ((1, 2));
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extern const char *strpbrk (const char *__s, const char *__accept)
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__THROW __asm ("strpbrk") __attribute_pure__ __nonnull ((1, 2));
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# ifdef __OPTIMIZE__
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__extern_always_inline char *
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strpbrk (char *__s, const char *__accept) __THROW
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{
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return __builtin_strpbrk (__s, __accept);
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}
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__extern_always_inline const char *
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strpbrk (const char *__s, const char *__accept) __THROW
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{
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return __builtin_strpbrk (__s, __accept);
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}
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# endif
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}
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#else
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extern char *strpbrk (const char *__s, const char *__accept)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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#endif
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/* Find the first occurrence of NEEDLE in HAYSTACK. */
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#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++"
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{
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extern char *strstr (char *__haystack, const char *__needle)
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__THROW __asm ("strstr") __attribute_pure__ __nonnull ((1, 2));
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extern const char *strstr (const char *__haystack, const char *__needle)
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__THROW __asm ("strstr") __attribute_pure__ __nonnull ((1, 2));
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# ifdef __OPTIMIZE__
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__extern_always_inline char *
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strstr (char *__haystack, const char *__needle) __THROW
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{
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return __builtin_strstr (__haystack, __needle);
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}
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__extern_always_inline const char *
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strstr (const char *__haystack, const char *__needle) __THROW
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{
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return __builtin_strstr (__haystack, __needle);
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}
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# endif
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}
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#else
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extern char *strstr (const char *__haystack, const char *__needle)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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#endif
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/* Divide S into tokens separated by characters in DELIM. */
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extern char *strtok (char *__restrict __s, const char *__restrict __delim)
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__THROW __nonnull ((2));
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__END_NAMESPACE_STD
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/* Divide S into tokens separated by characters in DELIM. Information
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passed between calls are stored in SAVE_PTR. */
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extern char *__strtok_r (char *__restrict __s,
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const char *__restrict __delim,
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char **__restrict __save_ptr)
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__THROW __nonnull ((2, 3));
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#ifdef __USE_POSIX
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extern char *strtok_r (char *__restrict __s, const char *__restrict __delim,
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char **__restrict __save_ptr)
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__THROW __nonnull ((2, 3));
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#endif
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#ifdef __USE_GNU
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/* Similar to `strstr' but this function ignores the case of both strings. */
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# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++" char *strcasestr (char *__haystack, const char *__needle)
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__THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2));
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extern "C++" const char *strcasestr (const char *__haystack,
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const char *__needle)
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__THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2));
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# else
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extern char *strcasestr (const char *__haystack, const char *__needle)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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# endif
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#endif
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#ifdef __USE_GNU
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/* Find the first occurrence of NEEDLE in HAYSTACK.
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NEEDLE is NEEDLELEN bytes long;
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HAYSTACK is HAYSTACKLEN bytes long. */
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extern void *memmem (const void *__haystack, size_t __haystacklen,
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const void *__needle, size_t __needlelen)
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__THROW __attribute_pure__ __nonnull ((1, 3));
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/* Copy N bytes of SRC to DEST, return pointer to bytes after the
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last written byte. */
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extern void *__mempcpy (void *__restrict __dest,
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const void *__restrict __src, size_t __n)
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__THROW __nonnull ((1, 2));
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extern void *mempcpy (void *__restrict __dest,
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const void *__restrict __src, size_t __n)
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__THROW __nonnull ((1, 2));
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#endif
|
|
|
|
|
|
__BEGIN_NAMESPACE_STD
|
|
/* Return the length of S. */
|
|
extern size_t strlen (const char *__s)
|
|
__THROW __attribute_pure__ __nonnull ((1));
|
|
__END_NAMESPACE_STD
|
|
|
|
#ifdef __USE_XOPEN2K8
|
|
/* Find the length of STRING, but scan at most MAXLEN characters.
|
|
If no '\0' terminator is found in that many characters, return MAXLEN. */
|
|
extern size_t strnlen (const char *__string, size_t __maxlen)
|
|
__THROW __attribute_pure__ __nonnull ((1));
|
|
#endif
|
|
|
|
|
|
__BEGIN_NAMESPACE_STD
|
|
/* Return a string describing the meaning of the `errno' code in ERRNUM. */
|
|
extern char *strerror (int __errnum) __THROW;
|
|
__END_NAMESPACE_STD
|
|
#ifdef __USE_XOPEN2K
|
|
/* Reentrant version of `strerror'.
|
|
There are 2 flavors of `strerror_r', GNU which returns the string
|
|
and may or may not use the supplied temporary buffer and POSIX one
|
|
which fills the string into the buffer.
|
|
To use the POSIX version, -D_XOPEN_SOURCE=600 or -D_POSIX_C_SOURCE=200112L
|
|
without -D_GNU_SOURCE is needed, otherwise the GNU version is
|
|
preferred. */
|
|
# if defined __USE_XOPEN2K && !defined __USE_GNU
|
|
/* Fill BUF with a string describing the meaning of the `errno' code in
|
|
ERRNUM. */
|
|
# ifdef __REDIRECT_NTH
|
|
extern int __REDIRECT_NTH (strerror_r,
|
|
(int __errnum, char *__buf, size_t __buflen),
|
|
__xpg_strerror_r) __nonnull ((2));
|
|
# else
|
|
extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen)
|
|
__THROW __nonnull ((2));
|
|
# define strerror_r __xpg_strerror_r
|
|
# endif
|
|
# else
|
|
/* If a temporary buffer is required, at most BUFLEN bytes of BUF will be
|
|
used. */
|
|
extern char *strerror_r (int __errnum, char *__buf, size_t __buflen)
|
|
__THROW __nonnull ((2)) __wur;
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef __USE_XOPEN2K8
|
|
/* Translate error number to string according to the locale L. */
|
|
extern char *strerror_l (int __errnum, __locale_t __l) __THROW;
|
|
#endif
|
|
|
|
|
|
/* We define this function always since `bzero' is sometimes needed when
|
|
the namespace rules does not allow this. */
|
|
extern void __bzero (void *__s, size_t __n) __THROW __nonnull ((1));
|
|
|
|
#ifdef __USE_MISC
|
|
/* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
|
|
extern void bcopy (const void *__src, void *__dest, size_t __n)
|
|
__THROW __nonnull ((1, 2));
|
|
|
|
/* Set N bytes of S to 0. */
|
|
extern void bzero (void *__s, size_t __n) __THROW __nonnull ((1));
|
|
|
|
/* Compare N bytes of S1 and S2 (same as memcmp). */
|
|
extern int bcmp (const void *__s1, const void *__s2, size_t __n)
|
|
__THROW __attribute_pure__ __nonnull ((1, 2));
|
|
|
|
/* Find the first occurrence of C in S (same as strchr). */
|
|
# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
|
|
extern "C++"
|
|
{
|
|
extern char *index (char *__s, int __c)
|
|
__THROW __asm ("index") __attribute_pure__ __nonnull ((1));
|
|
extern const char *index (const char *__s, int __c)
|
|
__THROW __asm ("index") __attribute_pure__ __nonnull ((1));
|
|
|
|
# if defined __OPTIMIZE__ && !defined __CORRECT_ISO_CPP_STRINGS_H_PROTO
|
|
__extern_always_inline char *
|
|
index (char *__s, int __c) __THROW
|
|
{
|
|
return __builtin_index (__s, __c);
|
|
}
|
|
|
|
__extern_always_inline const char *
|
|
index (const char *__s, int __c) __THROW
|
|
{
|
|
return __builtin_index (__s, __c);
|
|
}
|
|
# endif
|
|
}
|
|
# else
|
|
extern char *index (const char *__s, int __c)
|
|
__THROW __attribute_pure__ __nonnull ((1));
|
|
# endif
|
|
|
|
/* Find the last occurrence of C in S (same as strrchr). */
|
|
# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
|
|
extern "C++"
|
|
{
|
|
extern char *rindex (char *__s, int __c)
|
|
__THROW __asm ("rindex") __attribute_pure__ __nonnull ((1));
|
|
extern const char *rindex (const char *__s, int __c)
|
|
__THROW __asm ("rindex") __attribute_pure__ __nonnull ((1));
|
|
|
|
# if defined __OPTIMIZE__ && !defined __CORRECT_ISO_CPP_STRINGS_H_PROTO
|
|
__extern_always_inline char *
|
|
rindex (char *__s, int __c) __THROW
|
|
{
|
|
return __builtin_rindex (__s, __c);
|
|
}
|
|
|
|
__extern_always_inline const char *
|
|
rindex (const char *__s, int __c) __THROW
|
|
{
|
|
return __builtin_rindex (__s, __c);
|
|
}
|
|
#endif
|
|
}
|
|
# else
|
|
extern char *rindex (const char *__s, int __c)
|
|
__THROW __attribute_pure__ __nonnull ((1));
|
|
# endif
|
|
|
|
/* Return the position of the first bit set in I, or 0 if none are set.
|
|
The least-significant bit is position 1, the most-significant 32. */
|
|
extern int ffs (int __i) __THROW __attribute__ ((__const__));
|
|
|
|
/* The following two functions are non-standard but necessary for non-32 bit
|
|
platforms. */
|
|
# ifdef __USE_GNU
|
|
extern int ffsl (long int __l) __THROW __attribute__ ((__const__));
|
|
__extension__ extern int ffsll (long long int __ll)
|
|
__THROW __attribute__ ((__const__));
|
|
# endif
|
|
|
|
/* Compare S1 and S2, ignoring case. */
|
|
extern int strcasecmp (const char *__s1, const char *__s2)
|
|
__THROW __attribute_pure__ __nonnull ((1, 2));
|
|
|
|
/* Compare no more than N chars of S1 and S2, ignoring case. */
|
|
extern int strncasecmp (const char *__s1, const char *__s2, size_t __n)
|
|
__THROW __attribute_pure__ __nonnull ((1, 2));
|
|
#endif /* Use misc. */
|
|
|
|
#ifdef __USE_GNU
|
|
/* Again versions of a few functions which use the given locale instead
|
|
of the global one. */
|
|
extern int strcasecmp_l (const char *__s1, const char *__s2,
|
|
__locale_t __loc)
|
|
__THROW __attribute_pure__ __nonnull ((1, 2, 3));
|
|
|
|
extern int strncasecmp_l (const char *__s1, const char *__s2,
|
|
size_t __n, __locale_t __loc)
|
|
__THROW __attribute_pure__ __nonnull ((1, 2, 4));
|
|
#endif
|
|
|
|
#ifdef __USE_MISC
|
|
/* Return the next DELIM-delimited token from *STRINGP,
|
|
terminating it with a '\0', and update *STRINGP to point past it. */
|
|
extern char *strsep (char **__restrict __stringp,
|
|
const char *__restrict __delim)
|
|
__THROW __nonnull ((1, 2));
|
|
#endif
|
|
|
|
#ifdef __USE_XOPEN2K8
|
|
/* Return a string describing the meaning of the signal number in SIG. */
|
|
extern char *strsignal (int __sig) __THROW;
|
|
|
|
/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
|
|
extern char *__stpcpy (char *__restrict __dest, const char *__restrict __src)
|
|
__THROW __nonnull ((1, 2));
|
|
extern char *stpcpy (char *__restrict __dest, const char *__restrict __src)
|
|
__THROW __nonnull ((1, 2));
|
|
|
|
/* Copy no more than N characters of SRC to DEST, returning the address of
|
|
the last character written into DEST. */
|
|
extern char *__stpncpy (char *__restrict __dest,
|
|
const char *__restrict __src, size_t __n)
|
|
__THROW __nonnull ((1, 2));
|
|
extern char *stpncpy (char *__restrict __dest,
|
|
const char *__restrict __src, size_t __n)
|
|
__THROW __nonnull ((1, 2));
|
|
#endif
|
|
|
|
#ifdef __USE_GNU
|
|
/* Compare S1 and S2 as strings holding name & indices/version numbers. */
|
|
extern int strverscmp (const char *__s1, const char *__s2)
|
|
__THROW __attribute_pure__ __nonnull ((1, 2));
|
|
|
|
/* Sautee STRING briskly. */
|
|
extern char *strfry (char *__string) __THROW __nonnull ((1));
|
|
|
|
/* Frobnicate N bytes of S. */
|
|
extern void *memfrob (void *__s, size_t __n) __THROW __nonnull ((1));
|
|
|
|
# ifndef basename
|
|
/* Return the file name within directory of FILENAME. We don't
|
|
declare the function if the `basename' macro is available (defined
|
|
in <libgen.h>) which makes the XPG version of this function
|
|
available. */
|
|
# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
|
|
extern "C++" char *basename (char *__filename)
|
|
__THROW __asm ("basename") __nonnull ((1));
|
|
extern "C++" const char *basename (const char *__filename)
|
|
__THROW __asm ("basename") __nonnull ((1));
|
|
# else
|
|
extern char *basename (const char *__filename) __THROW __nonnull ((1));
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
|
|
#if __GNUC_PREREQ (3,4)
|
|
# if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ \
|
|
&& !defined __NO_INLINE__ && !defined __cplusplus
|
|
/* When using GNU CC we provide some optimized versions of selected
|
|
functions from this header. There are two kinds of optimizations:
|
|
|
|
- machine-dependent optimizations, most probably using inline
|
|
assembler code; these might be quite expensive since the code
|
|
size can increase significantly.
|
|
These optimizations are not used unless the symbol
|
|
__USE_STRING_INLINES
|
|
is defined before including this header.
|
|
|
|
- machine-independent optimizations which do not increase the
|
|
code size significantly and which optimize mainly situations
|
|
where one or more arguments are compile-time constants.
|
|
These optimizations are used always when the compiler is
|
|
taught to optimize.
|
|
|
|
One can inhibit all optimizations by defining __NO_STRING_INLINES. */
|
|
|
|
/* Get the machine-dependent optimizations (if any). */
|
|
# include <bits/string.h>
|
|
|
|
/* These are generic optimizations which do not add too much inline code. */
|
|
# include <bits/string2.h>
|
|
# endif
|
|
|
|
# if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
|
|
/* Functions with security checks. */
|
|
# include <bits/string3.h>
|
|
# endif
|
|
#endif
|
|
|
|
#if defined __USE_GNU && defined __OPTIMIZE__ \
|
|
&& defined __extern_always_inline && __GNUC_PREREQ (3,2)
|
|
# if !defined _FORCE_INLINES && !defined _HAVE_STRING_ARCH_mempcpy
|
|
|
|
#define mempcpy(dest, src, n) __mempcpy_inline (dest, src, n)
|
|
#define __mempcpy(dest, src, n) __mempcpy_inline (dest, src, n)
|
|
|
|
__extern_always_inline void *
|
|
__mempcpy_inline (void *__restrict __dest,
|
|
const void *__restrict __src, size_t __n)
|
|
{
|
|
return (char *) memcpy (__dest, __src, __n) + __n;
|
|
}
|
|
|
|
# endif
|
|
#endif
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* string.h */
|