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cd748a63ab
C23 makes various standard library functions, that return a pointer into an input array, into macros that return a pointer to const when the relevant argument passed to the macro is a pointer to const. (The requirement is for macros, with the existing function types applying when macro expansion is suppressed. When a null pointer constant is passed, such as integer 0, that's the same as a pointer to non-const.) Implement this feature. This only applies to C, not C++, since such macros are not an appropriate way of doing this for C++ and all the affected functions other than bsearch have overloads to implement an equivalent feature for C++ anyway. Nothing is done to apply such a change to any non-C23 functions with the same property of returning a pointer into an input array. The feature is also disabled when _LIBC is defined, since there are various places in glibc that either redefine these identifiers as macros, or define the functions themselves, and would need changing to work in the presence of these macro definitions. A natural question is whether we should in fact change those places and not disable the macro definitions for _LIBC. If so, we'd need a solution for the places in glibc that define the macro *before* including the relevant header (in order in effect to disable the header declaration of the function by renaming that declaration). One testcase has #undef added to avoid conflicting with this feature and another has const added; -Wno-discarded-qualifiers is added for building zic (but could be removed once there's a new upstream tzcode release that's const-safe with this C23 change and glibc has updated to code from that new release). Probably other places in glibc proper would need const added if we remove the _LIBC conditionals. Another question would be whether some GCC extension should be added to support this feature better with macros that only expand each argument once (as well as reducing duplication of diagnostics for bad usages such as non-pointer and pointer-to-volatile-qualfied arguments). Tested for x86_64.
583 lines
21 KiB
C
583 lines
21 KiB
C
/* Copyright (C) 1991-2025 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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<https://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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|| __glibc_clang_prereq (3, 5))
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# define __CORRECT_ISO_CPP_STRING_H_PROTO
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#endif
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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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/* 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 || __GLIBC_USE (ISOC23)
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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)) __attr_access ((__write_only__, 1, 4));
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#endif /* Misc || X/Open. */
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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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#if defined __USE_MISC || __GLIBC_USE (ISOC23)
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/* Like memset, but the compiler will not delete a call to this
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function, even if S is dead after the call. */
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extern void *memset_explicit (void *__s, int __c, size_t __n)
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__THROW __nonnull ((1)) __fortified_attr_access (__write_only__, 1, 3);
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#endif
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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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/* Compare N bytes of S1 and S2. Return zero if S1 and S2 are equal.
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Return some non-zero value otherwise.
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Essentially __memcmpeq has the exact same semantics as memcmp
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except the return value is less constrained. memcmp is always a
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correct implementation of __memcmpeq. As well !!memcmp, -memcmp,
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or bcmp are correct implementations.
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__memcmpeq is meant to be used by compilers when memcmp return is
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only used for its boolean value.
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__memcmpeq is declared only for use by compilers. Programs should
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continue to use memcmp. */
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extern int __memcmpeq (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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# if __GLIBC_USE (ISOC23) && defined __glibc_const_generic && !defined _LIBC
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# define memchr(S, C, N) \
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__glibc_const_generic (S, const void *, memchr (S, C, N))
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# endif
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#endif
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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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__attr_access ((__read_only__, 1, 3));
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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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__attr_access ((__read_only__, 1, 3));
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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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__attr_access ((__read_only__, 1, 3));
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# endif
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#endif
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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)) __attr_access ((__write_only__, 1, 3));
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#ifdef __USE_XOPEN2K8
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/* POSIX.1-2008 extended locale interface (see locale.h). */
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# include <bits/types/locale_t.h>
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/* Compare the collated forms of S1 and S2, using sorting 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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using sorting rules from L. */
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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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__attr_access ((__write_only__, 1, 3));
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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) || __GLIBC_USE (ISOC23))
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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) || __GLIBC_USE (ISOC23)
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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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/* 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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# if __GLIBC_USE (ISOC23) && defined __glibc_const_generic && !defined _LIBC
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# define strchr(S, C) \
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__glibc_const_generic (S, const char *, strchr (S, C))
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# endif
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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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# if __GLIBC_USE (ISOC23) && defined __glibc_const_generic && !defined _LIBC
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# define strrchr(S, C) \
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__glibc_const_generic (S, const char *, strrchr (S, C))
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# endif
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#endif
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#ifdef __USE_MISC
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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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/* 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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# if __GLIBC_USE (ISOC23) && defined __glibc_const_generic && !defined _LIBC
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# define strpbrk(S, ACCEPT) \
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__glibc_const_generic (S, const char *, strpbrk (S, ACCEPT))
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# endif
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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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|
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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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# if __GLIBC_USE (ISOC23) && defined __glibc_const_generic && !defined _LIBC
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|
# define strstr(HAYSTACK, NEEDLE) \
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__glibc_const_generic (HAYSTACK, const char *, \
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strstr (HAYSTACK, NEEDLE))
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# endif
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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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|
|
/* Divide S into tokens separated by characters in DELIM. Information
|
|
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));
|
|
#ifdef __USE_POSIX
|
|
extern char *strtok_r (char *__restrict __s, const char *__restrict __delim,
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|
char **__restrict __save_ptr)
|
|
__THROW __nonnull ((2, 3));
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#endif
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|
#ifdef __USE_MISC
|
|
/* 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)
|
|
__THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2));
|
|
# else
|
|
extern char *strcasestr (const char *__haystack, const char *__needle)
|
|
__THROW __attribute_pure__ __nonnull ((1, 2));
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef __USE_MISC
|
|
/* Find the first occurrence of NEEDLE in HAYSTACK.
|
|
NEEDLE is NEEDLELEN bytes long;
|
|
HAYSTACK is HAYSTACKLEN bytes long. */
|
|
extern void *memmem (const void *__haystack, size_t __haystacklen,
|
|
const void *__needle, size_t __needlelen)
|
|
__THROW __attribute_pure__ __nonnull ((1, 3))
|
|
__attr_access ((__read_only__, 1, 2))
|
|
__attr_access ((__read_only__, 3, 4));
|
|
|
|
/* Copy N bytes of SRC to DEST, return pointer to bytes after the
|
|
last written byte. */
|
|
extern void *__mempcpy (void *__restrict __dest,
|
|
const void *__restrict __src, size_t __n)
|
|
__THROW __nonnull ((1, 2));
|
|
extern void *mempcpy (void *__restrict __dest,
|
|
const void *__restrict __src, size_t __n)
|
|
__THROW __nonnull ((1, 2));
|
|
#endif
|
|
|
|
|
|
/* Return the length of S. */
|
|
extern size_t strlen (const char *__s)
|
|
__THROW __attribute_pure__ __nonnull ((1));
|
|
|
|
#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
|
|
|
|
|
|
/* Return a string describing the meaning of the `errno' code in ERRNUM. */
|
|
extern char *strerror (int __errnum) __THROW;
|
|
#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))
|
|
__attr_access ((__write_only__, 2, 3));
|
|
# else
|
|
extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen)
|
|
__THROW __nonnull ((2)) __attr_access ((__write_only__, 2, 3));
|
|
# 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 __attr_access ((__write_only__, 2, 3));
|
|
# endif
|
|
|
|
# ifdef __USE_GNU
|
|
/* Return a string describing the meaning of tthe error in ERR. */
|
|
extern const char *strerrordesc_np (int __err) __THROW;
|
|
/* Return a string with the error name in ERR. */
|
|
extern const char *strerrorname_np (int __err) __THROW;
|
|
# 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
|
|
|
|
#ifdef __USE_MISC
|
|
# include <strings.h>
|
|
|
|
/* Set N bytes of S to 0. The compiler will not delete a call to this
|
|
function, even if S is dead after the call. */
|
|
extern void explicit_bzero (void *__s, size_t __n) __THROW __nonnull ((1))
|
|
__fortified_attr_access (__write_only__, 1, 2);
|
|
|
|
/* 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;
|
|
|
|
# ifdef __USE_GNU
|
|
/* Return an abbreviation string for the signal number SIG. */
|
|
extern const char *sigabbrev_np (int __sig) __THROW;
|
|
/* Return a string describing the meaning of the signal number in SIG,
|
|
the result is not translated. */
|
|
extern const char *sigdescr_np (int __sig) __THROW;
|
|
# endif
|
|
|
|
/* 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_MISC
|
|
/* Copy at most N - 1 characters from SRC to DEST. */
|
|
extern size_t strlcpy (char *__restrict __dest,
|
|
const char *__restrict __src, size_t __n)
|
|
__THROW __nonnull ((1, 2)) __attr_access ((__write_only__, 1, 3));
|
|
|
|
/* Append SRC to DEST, possibly with truncation to keep the total size
|
|
below N. */
|
|
extern size_t strlcat (char *__restrict __dest,
|
|
const char *__restrict __src, size_t __n)
|
|
__THROW __nonnull ((1, 2)) __attr_access ((__read_write__, 1, 3));
|
|
#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))
|
|
__attr_access ((__read_write__, 1, 2));
|
|
|
|
# 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 __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
|
|
/* Functions with security checks. */
|
|
# include <bits/string_fortified.h>
|
|
# endif
|
|
#endif
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* string.h */
|