libstdc++/api/a00335_source.html

// -*- C++ -*- forwarding header.


// Copyright (C) 1997-2025 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 3, or (at your option)

// any later version.


// This 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 General Public License for more details.


// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.


// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// <http://www.gnu.org/licenses/>.


/** @file cstring

 *  This is a Standard C++ Library file.  You should @c \#include this file

 *  in your programs, rather than any of the @a *.h implementation files.

 *

 *  This is the C++ version of the Standard C Library header @c string.h,

 *  and its contents are (mostly) the same as that header, but are all

 *  contained in the namespace @c std (except for names which are defined

 *  as macros in C).

 */


//

// ISO C++ 14882: 20.4.6  C library

//


#ifndef _GLIBCXX_CSTRING

#define _GLIBCXX_CSTRING 1


#ifdef _GLIBCXX_SYSHDR

#pragma GCC system_header

#endif


#define __glibcxx_want_freestanding_cstring

#include <bits/version.h>

#include <string.h>


// Get rid of those macros defined in <string.h> in lieu of real functions.

#undef memchr

#undef memcmp

#undef memcpy

#undef memmove

#undef memset

#undef strcat

#undef strchr

#undef strcmp

#undef strcoll

#undef strcpy

#undef strcspn

#undef strerror

#undef strlen

#undef strncat

#undef strncmp

#undef strncpy

#undef strpbrk

#undef strrchr

#undef strspn

#undef strstr

#undef strtok

#undef strxfrm


extern "C++"

{

namespace std _GLIBCXX_VISIBILITY(default)

{

_GLIBCXX_BEGIN_NAMESPACE_VERSION


  using ::memchr;

  using ::memcmp;

  using ::memcpy;

  using ::memmove;

  using ::memset;

  using ::strcat;

  using ::strcmp;

  using ::strcoll;

  using ::strcpy;

  using ::strcspn;

  using ::strerror;

  using ::strlen;

  using ::strncat;

  using ::strncmp;

  using ::strncpy;

  using ::strspn;

#if _GLIBCXX_HOSTED || __cplusplus <= 202302L

  using ::strtok;

#endif

  using ::strxfrm;

  using ::strchr;

  using ::strpbrk;

  using ::strrchr;

  using ::strstr;


#ifndef __CORRECT_ISO_CPP_STRING_H_PROTO

  inline void*

  memchr(void* __s, int __c, size_t __n)

  { return __builtin_memchr(__s, __c, __n); }


  inline char*

  strchr(char* __s, int __n)

  { return __builtin_strchr(__s, __n); }


  inline char*

  strpbrk(char* __s1, const char* __s2)

  { return __builtin_strpbrk(__s1, __s2); }


  inline char*

  strrchr(char* __s, int __n)

  { return __builtin_strrchr(__s, __n); }


  inline char*

  strstr(char* __s1, const char* __s2)

  { return __builtin_strstr(__s1, __s2); }

#endif


_GLIBCXX_END_NAMESPACE_VERSION

} // namespace

} // extern "C++"


#endif