libstdc++-v3/include/c_std/cstdlib

   1 // -*- C++ -*- forwarding header.
   2
   3 // Copyright (C) 1997-2022 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 #ifndef _GLIBCXX_CSTDLIB
  40 #define _GLIBCXX_CSTDLIB 1
  41
  42 #pragma GCC system_header
  43
  44 #include <bits/c++config.h>
  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
  69
  70 #else
  71
  72 #include <stdlib.h>
  73
  74 // Get rid of those macros defined in <stdlib.h> in lieu of real functions.
  75 #undef abort
  76 #undef abs
  77 #undef atexit
  78 #if __cplusplus >= 201103L
  79 # ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
  80 #  undef at_quick_exit
  81 # endif
  82 #endif
  83 #undef atof
  84 #undef atoi
  85 #undef atol
  86 #undef bsearch
  87 #undef calloc
  88 #undef div
  89 #undef exit
  90 #undef free
  91 #undef getenv
  92 #undef labs
  93 #undef ldiv
  94 #undef malloc
  95 #undef mblen
  96 #undef mbstowcs
  97 #undef mbtowc
  98 #undef qsort
  99 #if __cplusplus >= 201103L
 100 # ifdef _GLIBCXX_HAVE_QUICK_EXIT
 101 #  undef quick_exit
 102 # endif
 103 #endif
 104 #undef rand
 105 #undef realloc
 106 #undef srand
 107 #undef strtod
 108 #undef strtol
 109 #undef strtoul
 110 #undef system
 111 #undef wcstombs
 112 #undef wctomb
 113
 114 namespace std _GLIBCXX_VISIBILITY(default)
 115 {
 116 _GLIBCXX_BEGIN_NAMESPACE_VERSION
 117
 118   using ::div_t;
 119   using ::ldiv_t;
 120
 121   using ::abort;
 122   using ::abs;
 123   using ::atexit;
 124 #if __cplusplus >= 201103L
 125 # ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
 126   using ::at_quick_exit;
 127 # endif
 128 #endif
 129   using ::atof;
 130   using ::atoi;
 131   using ::atol;
 132   using ::bsearch;
 133   using ::calloc;
 134   using ::div;
 135   using ::exit;
 136   using ::free;
 137   using ::getenv;
 138   using ::labs;
 139   using ::ldiv;
 140   using ::malloc;
 141 #ifdef _GLIBCXX_HAVE_MBSTATE_T
 142   using ::mblen;
 143   using ::mbstowcs;
 144   using ::mbtowc;
 145 #endif // _GLIBCXX_HAVE_MBSTATE_T
 146   using ::qsort;
 147 #if __cplusplus >= 201103L
 148 # ifdef _GLIBCXX_HAVE_QUICK_EXIT
 149   using ::quick_exit;
 150 # endif
 151 #endif
 152   using ::rand;
 153   using ::realloc;
 154   using ::srand;
 155   using ::strtod;
 156   using ::strtol;
 157   using ::strtoul;
 158   using ::system;
 159 #ifdef _GLIBCXX_USE_WCHAR_T
 160   using ::wcstombs;
 161   using ::wctomb;
 162 #endif // _GLIBCXX_USE_WCHAR_T
 163
 164   inline long
 165   abs(long __i) { return __builtin_labs(__i); }
 166
 167 #ifdef _GLIBCXX_USE_LONG_LONG
 168   inline long long
 169   abs(long long __x) { return __builtin_llabs (__x); }
 170 #endif
 171
 172 #if defined(__GLIBCXX_TYPE_INT_N_0)
 173   inline __GLIBCXX_TYPE_INT_N_0
 174   abs(__GLIBCXX_TYPE_INT_N_0 __x) { return __x >= 0 ? __x : -__x; }
 175 #endif
 176 #if defined(__GLIBCXX_TYPE_INT_N_1)
 177   inline __GLIBCXX_TYPE_INT_N_1
 178   abs(__GLIBCXX_TYPE_INT_N_1 __x) { return __x >= 0 ? __x : -__x; }
 179 #endif
 180 #if defined(__GLIBCXX_TYPE_INT_N_2)
 181   inline __GLIBCXX_TYPE_INT_N_2
 182   abs(__GLIBCXX_TYPE_INT_N_2 __x) { return __x >= 0 ? __x : -__x; }
 183 #endif
 184 #if defined(__GLIBCXX_TYPE_INT_N_3)
 185   inline __GLIBCXX_TYPE_INT_N_3
 186   abs(__GLIBCXX_TYPE_INT_N_3 __x) { return __x >= 0 ? __x : -__x; }
 187 #endif
 188
 189   inline ldiv_t
 190   div(long __i, long __j) { return ldiv(__i, __j); }
 191
 192 _GLIBCXX_END_NAMESPACE_VERSION
 193 } // namespace
 194
 195 #if _GLIBCXX_USE_C99_STDLIB
 196
 197 #undef _Exit
 198 #undef llabs
 199 #undef lldiv
 200 #undef atoll
 201 #undef strtoll
 202 #undef strtoull
 203 #undef strtof
 204 #undef strtold
 205
 206 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
 207 {
 208 _GLIBCXX_BEGIN_NAMESPACE_VERSION
 209
 210 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
 211   using ::lldiv_t;
 212 #endif
 213 #if _GLIBCXX_USE_C99_CHECK || _GLIBCXX_USE_C99_DYNAMIC
 214   extern "C" void (_Exit)(int) throw () _GLIBCXX_NORETURN;
 215 #endif
 216 #if !_GLIBCXX_USE_C99_DYNAMIC
 217   using ::_Exit;
 218 #endif
 219
 220 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
 221   using ::llabs;
 222
 223   inline lldiv_t
 224   div(long long __n, long long __d)
 225   { lldiv_t __q; __q.quot = __n / __d; __q.rem = __n % __d; return __q; }
 226
 227   using ::lldiv;
 228 #endif
 229
 230 #if _GLIBCXX_USE_C99_LONG_LONG_CHECK || _GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
 231   extern "C" long long int (atoll)(const char *) throw ();
 232   extern "C" long long int
 233     (strtoll)(const char * __restrict, char ** __restrict, int) throw ();
 234   extern "C" unsigned long long int
 235     (strtoull)(const char * __restrict, char ** __restrict, int) throw ();
 236 #endif
 237 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
 238   using ::atoll;
 239   using ::strtoll;
 240   using ::strtoull;
 241 #endif
 242   using ::strtof;
 243   using ::strtold;
 244
 245 _GLIBCXX_END_NAMESPACE_VERSION
 246 } // namespace __gnu_cxx
 247
 248 namespace std
 249 {
 250 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
 251   using ::__gnu_cxx::lldiv_t;
 252 #endif
 253   using ::__gnu_cxx::_Exit;
 254 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
 255   using ::__gnu_cxx::llabs;
 256   using ::__gnu_cxx::div;
 257   using ::__gnu_cxx::lldiv;
 258 #endif
 259   using ::__gnu_cxx::atoll;
 260   using ::__gnu_cxx::strtof;
 261   using ::__gnu_cxx::strtoll;
 262   using ::__gnu_cxx::strtoull;
 263   using ::__gnu_cxx::strtold;
 264 } // namespace std
 265
 266 #endif // _GLIBCXX_USE_C99_STDLIB
 267
 268 #endif // !_GLIBCXX_HOSTED
 269
 270 #endif