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6_I|+ ? /* Copyright (C) 1991-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
. */
/*
* ISO C99 Standard: 7.21 String handling
*/
#ifndef _STRING_H
#define _STRING_H 1
#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
#include
__BEGIN_DECLS
/* Get size_t and NULL from . */
#define __need_size_t
#define __need_NULL
#include
/* Tell the caller that we provide correct C++ prototypes. */
#if defined __cplusplus && (__GNUC_PREREQ (4, 4) \
|| __glibc_clang_prereq (3, 5))
# define __CORRECT_ISO_CPP_STRING_H_PROTO
#endif
/* Copy N bytes of SRC to DEST. */
extern void *memcpy (void *__restrict __dest, const void *__restrict __src,
size_t __n) __THROW __nonnull ((1, 2));
/* Copy N bytes of SRC to DEST, guaranteeing
correct behavior for overlapping strings. */
extern void *memmove (void *__dest, const void *__src, size_t __n)
__THROW __nonnull ((1, 2));
/* Copy no more than N bytes of SRC to DEST, stopping when C is found.
Return the position in DEST one byte past where C was copied,
or NULL if C was not found in the first N bytes of SRC. */
#if defined __USE_MISC || defined __USE_XOPEN || __GLIBC_USE (ISOC2X)
extern void *memccpy (void *__restrict __dest, const void *__restrict __src,
int __c, size_t __n)
__THROW __nonnull ((1, 2)) __attr_access ((__write_only__, 1, 4));
#endif /* Misc || X/Open. */
/* Set N bytes of S to C. */
extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1));
/* Compare N bytes of S1 and S2. */
extern int memcmp (const void *__s1, const void *__s2, size_t __n)
__THROW __attribute_pure__ __nonnull ((1, 2));
/* Compare N bytes of S1 and S2. Return zero if S1 and S2 are equal.
Return some non-zero value otherwise.
Essentially __memcmpeq has the exact same semantics as memcmp
except the return value is less constrained. memcmp is always a
correct implementation of __memcmpeq. As well !!memcmp, -memcmp,
or bcmp are correct implementations.
__memcmpeq is meant to be used by compilers when memcmp return is
only used for its bolean value.
__memcmpeq is declared only for use by compilers. Programs should
continue to use memcmp. */
extern int __memcmpeq (const void *__s1, const void *__s2, size_t __n)
__THROW __attribute_pure__ __nonnull ((1, 2));
/* Search N bytes of S for C. */
#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++"
{
extern void *memchr (void *__s, int __c, size_t __n)
__THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
extern const void *memchr (const void *__s, int __c, size_t __n)
__THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
# ifdef __OPTIMIZE__
__extern_always_inline void *
memchr (void *__s, int __c, size_t __n) __THROW
{
return __builtin_memchr (__s, __c, __n);
}
__extern_always_inline const void *
memchr (const void *__s, int __c, size_t __n) __THROW
{
return __builtin_memchr (__s, __c, __n);
}
# endif
}
#else
extern void *memchr (const void *__s, int __c, size_t __n)
__THROW __attribute_pure__ __nonnull ((1));
#endif
#ifdef __USE_GNU
/* Search in S for C. This is similar to `memchr' but there is no
length limit. */