libstdc++-v3/include/c_global/cstdlib

   1 // -*- C++ -*- forwarding header.
   2
   3 // Copyright (C) 1997-2019 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 include/cstdlib
  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 stdlib.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 #include <bits/c++config.h>
  42
  43 #ifndef _GLIBCXX_CSTDLIB
  44 #define _GLIBCXX_CSTDLIB 1
  45
  46 #if !_GLIBCXX_HOSTED
  47 // The C standard does not require a freestanding implementation to
  48 // provide <stdlib.h>.  However, the C++ standard does still require
  49 // <cstdlib> -- but only the functionality mentioned in
  50 // [lib.support.start.term].
  51
  52 #define EXIT_SUCCESS 0
  53 #define EXIT_FAILURE 1
  54
  55 namespace std
  56 {
  57   extern "C" void abort(void) throw () _GLIBCXX_NORETURN;
  58   extern "C" int atexit(void (*)(void)) throw ();
  59   extern "C" void exit(int) throw () _GLIBCXX_NORETURN;
  60 #if __cplusplus >= 201103L
  61 # ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
  62   extern "C" int at_quick_exit(void (*)(void)) throw ();
  63 # endif
  64 # ifdef _GLIBCXX_HAVE_QUICK_EXIT
  65   extern "C" void quick_exit(int) throw() _GLIBCXX_NORETURN;
  66 # endif
  67 #endif
  68 } // namespace std
  69
  70 #else
  71
  72 // Need to ensure this finds the C library's <stdlib.h> not a libstdc++
  73 // wrapper that might already be installed later in the include search path.
  74 #define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
  75 #include_next <stdlib.h>
  76 #undef _GLIBCXX_INCLUDE_NEXT_C_HEADERS
  77 #include <bits/std_abs.h>
  78
  79 // Get rid of those macros defined in <stdlib.h> in lieu of real functions.
  80 #undef abort
  81 #if __cplusplus >= 201703L && defined(_GLIBCXX_HAVE_ALIGNED_ALLOC)
  82 # undef aligned_alloc
  83 #endif
  84 #undef atexit
  85 #if __cplusplus >= 201103L
  86 # ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
  87 #  undef at_quick_exit
  88 # endif
  89 #endif
  90 #undef atof
  91 #undef atoi
  92 #undef atol
  93 #undef bsearch
  94 #undef calloc
  95 #undef div
  96 #undef exit
  97 #undef free
  98 #undef getenv
  99 #undef labs
 100 #undef ldiv
 101 #undef malloc
 102 #undef mblen
 103 #undef mbstowcs
 104 #undef mbtowc
 105 #undef qsort
 106 #if __cplusplus >= 201103L
 107 # ifdef _GLIBCXX_HAVE_QUICK_EXIT
 108 #  undef quick_exit
 109 # endif
 110 #endif
 111 #undef rand
 112 #undef realloc
 113 #undef srand
 114 #undef strtod
 115 #undef strtol
 116 #undef strtoul
 117 #undef system
 118 #undef wcstombs
 119 #undef wctomb
 120
 121 extern "C++"
 122 {
 123 namespace std _GLIBCXX_VISIBILITY(default)
 124 {
 125 _GLIBCXX_BEGIN_NAMESPACE_VERSION
 126
 127   using ::div_t;
 128   using ::ldiv_t;
 129
 130   using ::abort;
 131 #if __cplusplus >= 201703L && defined(_GLIBCXX_HAVE_ALIGNED_ALLOC)
 132   using ::aligned_alloc;
 133 #endif
 134   using ::atexit;
 135 #if __cplusplus >= 201103L
 136 # ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
 137   using ::at_quick_exit;
 138 # endif
 139 #endif
 140   using ::atof;
 141   using ::atoi;
 142   using ::atol;
 143   using ::bsearch;
 144   using ::calloc;
 145   using ::div;
 146   using ::exit;
 147   using ::free;
 148   using ::getenv;
 149   using ::labs;
 150   using ::ldiv;
 151   using ::malloc;
 152 #ifdef _GLIBCXX_HAVE_MBSTATE_T
 153   using ::mblen;
 154   using ::mbstowcs;
 155   using ::mbtowc;
 156 #endif // _GLIBCXX_HAVE_MBSTATE_T
 157   using ::qsort;
 158 #if __cplusplus >= 201103L
 159 # ifdef _GLIBCXX_HAVE_QUICK_EXIT
 160   using ::quick_exit;
 161 # endif
 162 #endif
 163   using ::rand;
 164   using ::realloc;
 165   using ::srand;
 166   using ::strtod;
 167   using ::strtol;
 168   using ::strtoul;
 169   using ::system;
 170 #ifdef _GLIBCXX_USE_WCHAR_T
 171   using ::wcstombs;
 172   using ::wctomb;
 173 #endif // _GLIBCXX_USE_WCHAR_T
 174
 175 #ifndef __CORRECT_ISO_CPP_STDLIB_H_PROTO
 176   inline ldiv_t
 177   div(long __i, long __j) { return ldiv(__i, __j); }
 178 #endif
 179
 180
 181 _GLIBCXX_END_NAMESPACE_VERSION
 182 } // namespace
 183
 184 #if _GLIBCXX_USE_C99_STDLIB
 185
 186 #undef _Exit
 187 #undef llabs
 188 #undef lldiv
 189 #undef atoll
 190 #undef strtoll
 191 #undef strtoull
 192 #undef strtof
 193 #undef strtold
 194
 195 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
 196 {
 197 _GLIBCXX_BEGIN_NAMESPACE_VERSION
 198
 199 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
 200   using ::lldiv_t;
 201 #endif
 202 #if _GLIBCXX_USE_C99_CHECK || _GLIBCXX_USE_C99_DYNAMIC
 203   extern "C" void (_Exit)(int) throw () _GLIBCXX_NORETURN;
 204 #endif
 205 #if !_GLIBCXX_USE_C99_DYNAMIC
 206   using ::_Exit;
 207 #endif
 208
 209 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
 210   using ::llabs;
 211
 212   inline lldiv_t
 213   div(long long __n, long long __d)
 214   { lldiv_t __q; __q.quot = __n / __d; __q.rem = __n % __d; return __q; }
 215
 216   using ::lldiv;
 217 #endif
 218
 219 #if _GLIBCXX_USE_C99_LONG_LONG_CHECK || _GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
 220   extern "C" long long int (atoll)(const char *) throw ();
 221   extern "C" long long int
 222     (strtoll)(const char * __restrict, char ** __restrict, int) throw ();
 223   extern "C" unsigned long long int
 224     (strtoull)(const char * __restrict, char ** __restrict, int) throw ();
 225 #endif
 226 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
 227   using ::atoll;
 228   using ::strtoll;
 229   using ::strtoull;
 230 #endif
 231   using ::strtof;
 232   using ::strtold;
 233
 234 _GLIBCXX_END_NAMESPACE_VERSION
 235 } // namespace __gnu_cxx
 236
 237 namespace std
 238 {
 239 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
 240   using ::__gnu_cxx::lldiv_t;
 241 #endif
 242   using ::__gnu_cxx::_Exit;
 243 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
 244   using ::__gnu_cxx::llabs;
 245   using ::__gnu_cxx::div;
 246   using ::__gnu_cxx::lldiv;
 247 #endif
 248   using ::__gnu_cxx::atoll;
 249   using ::__gnu_cxx::strtof;
 250   using ::__gnu_cxx::strtoll;
 251   using ::__gnu_cxx::strtoull;
 252   using ::__gnu_cxx::strtold;
 253 } // namespace std
 254
 255 #endif // _GLIBCXX_USE_C99_STDLIB
 256
 257 } // extern "C++"
 258
 259 #endif // !_GLIBCXX_HOSTED
 260
 261 #endif