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      1 // -*- C++ -*- forwarding header.
      2 
      3 // Copyright (C) 1997-2024 Free Software Foundation, Inc.
      4 //
      5 // This file is part of the GNU ISO C++ Library.  This library is free
      6 // software; you can redistribute it and/or modify it under the
      7 // terms of the GNU General Public License as published by the
      8 // Free Software Foundation; either version 3, or (at your option)
      9 // any later version.
     10 
     11 // This library is distributed in the hope that it will be useful,
     12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14 // GNU General Public License for more details.
     15 
     16 // Under Section 7 of GPL version 3, you are granted additional
     17 // permissions described in the GCC Runtime Library Exception, version
     18 // 3.1, as published by the Free Software Foundation.
     19 
     20 // You should have received a copy of the GNU General Public License and
     21 // a copy of the GCC Runtime Library Exception along with this program;
     22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     23 // <http://www.gnu.org/licenses/>.
     24 
     25 /** @file cstring
     26  *  This is a Standard C++ Library file.  You should @c \#include this file
     27  *  in your programs, rather than any of the @a *.h implementation files.
     28  *
     29  *  This is the C++ version of the Standard C Library header @c string.h,
     30  *  and its contents are (mostly) the same as that header, but are all
     31  *  contained in the namespace @c std (except for names which are defined
     32  *  as macros in C).
     33  */
     34 
     35 //
     36 // ISO C++ 14882: 20.4.6  C library
     37 //
     38 
     39 #pragma GCC system_header
     40 
     41 #define __glibcxx_want_freestanding_cstring
     42 #include <bits/version.h>
     43 #include <string.h>
     44 
     45 #ifndef _GLIBCXX_CSTRING
     46 #define _GLIBCXX_CSTRING 1
     47 
     48 // Get rid of those macros defined in <string.h> in lieu of real functions.
     49 #undef memchr
     50 #undef memcmp
     51 #undef memcpy
     52 #undef memmove
     53 #undef memset
     54 #undef strcat
     55 #undef strchr
     56 #undef strcmp
     57 #undef strcoll
     58 #undef strcpy
     59 #undef strcspn
     60 #undef strerror
     61 #undef strlen
     62 #undef strncat
     63 #undef strncmp
     64 #undef strncpy
     65 #undef strpbrk
     66 #undef strrchr
     67 #undef strspn
     68 #undef strstr
     69 #undef strtok
     70 #undef strxfrm
     71 
     72 extern "C++"
     73 {
     74 namespace std _GLIBCXX_VISIBILITY(default)
     75 {
     76 _GLIBCXX_BEGIN_NAMESPACE_VERSION
     77 
     78   using ::memchr;
     79   using ::memcmp;
     80   using ::memcpy;
     81   using ::memmove;
     82   using ::memset;
     83   using ::strcat;
     84   using ::strcmp;
     85   using ::strcoll;
     86   using ::strcpy;
     87   using ::strcspn;
     88   using ::strerror;
     89   using ::strlen;
     90   using ::strncat;
     91   using ::strncmp;
     92   using ::strncpy;
     93   using ::strspn;
     94 #if _GLIBCXX_HOSTED || __cplusplus <= 202302L
     95   using ::strtok;
     96 #endif
     97   using ::strxfrm;
     98   using ::strchr;
     99   using ::strpbrk;
    100   using ::strrchr;
    101   using ::strstr;
    102 
    103 #ifndef __CORRECT_ISO_CPP_STRING_H_PROTO
    104   inline void*
    105   memchr(void* __s, int __c, size_t __n)
    106   { return __builtin_memchr(__s, __c, __n); }
    107 
    108   inline char*
    109   strchr(char* __s, int __n)
    110   { return __builtin_strchr(__s, __n); }
    111 
    112   inline char*
    113   strpbrk(char* __s1, const char* __s2)
    114   { return __builtin_strpbrk(__s1, __s2); }
    115 
    116   inline char*
    117   strrchr(char* __s, int __n)
    118   { return __builtin_strrchr(__s, __n); }
    119 
    120   inline char*
    121   strstr(char* __s1, const char* __s2)
    122   { return __builtin_strstr(__s1, __s2); }
    123 #endif
    124 
    125 _GLIBCXX_END_NAMESPACE_VERSION
    126 } // namespace
    127 } // extern "C++"
    128 
    129 #endif
    130