libstdc++
cstdlib
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00001 // -*- C++ -*- forwarding header.
00002 
00003 // Copyright (C) 1997-2019 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the
00007 // terms of the GNU General Public License as published by the
00008 // Free Software Foundation; either version 3, or (at your option)
00009 // any later version.
00010 
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014 // GNU General Public License for more details.
00015 
00016 // Under Section 7 of GPL version 3, you are granted additional
00017 // permissions described in the GCC Runtime Library Exception, version
00018 // 3.1, as published by the Free Software Foundation.
00019 
00020 // You should have received a copy of the GNU General Public License and
00021 // a copy of the GCC Runtime Library Exception along with this program;
00022 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
00023 // <http://www.gnu.org/licenses/>.
00024 
00025 /** @file include/cstdlib
00026  *  This is a Standard C++ Library file.  You should @c \#include this file
00027  *  in your programs, rather than any of the @a *.h implementation files.
00028  *
00029  *  This is the C++ version of the Standard C Library header @c stdlib.h,
00030  *  and its contents are (mostly) the same as that header, but are all
00031  *  contained in the namespace @c std (except for names which are defined
00032  *  as macros in C).
00033  */
00034 
00035 //
00036 // ISO C++ 14882: 20.4.6  C library
00037 //
00038 
00039 #pragma GCC system_header
00040 
00041 #include <bits/c++config.h>
00042 
00043 #ifndef _GLIBCXX_CSTDLIB
00044 #define _GLIBCXX_CSTDLIB 1
00045 
00046 #if !_GLIBCXX_HOSTED
00047 // The C standard does not require a freestanding implementation to
00048 // provide <stdlib.h>.  However, the C++ standard does still require
00049 // <cstdlib> -- but only the functionality mentioned in
00050 // [lib.support.start.term].
00051 
00052 #define EXIT_SUCCESS 0
00053 #define EXIT_FAILURE 1
00054 
00055 namespace std
00056 {
00057   extern "C" void abort(void) throw () _GLIBCXX_NORETURN;
00058   extern "C" int atexit(void (*)(void)) throw ();
00059   extern "C" void exit(int) throw () _GLIBCXX_NORETURN;
00060 #if __cplusplus >= 201103L
00061 # ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
00062   extern "C" int at_quick_exit(void (*)(void)) throw ();
00063 # endif
00064 # ifdef _GLIBCXX_HAVE_QUICK_EXIT
00065   extern "C" void quick_exit(int) throw() _GLIBCXX_NORETURN;
00066 # endif
00067 #endif
00068 } // namespace std
00069 
00070 #else
00071 
00072 // Need to ensure this finds the C library's <stdlib.h> not a libstdc++
00073 // wrapper that might already be installed later in the include search path.
00074 #define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
00075 #include_next <stdlib.h>
00076 #undef _GLIBCXX_INCLUDE_NEXT_C_HEADERS
00077 #include <bits/std_abs.h>
00078 
00079 // Get rid of those macros defined in <stdlib.h> in lieu of real functions.
00080 #undef abort
00081 #if __cplusplus >= 201703L && defined(_GLIBCXX_HAVE_ALIGNED_ALLOC)
00082 # undef aligned_alloc
00083 #endif
00084 #undef atexit
00085 #if __cplusplus >= 201103L
00086 # ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
00087 #  undef at_quick_exit
00088 # endif
00089 #endif
00090 #undef atof
00091 #undef atoi
00092 #undef atol
00093 #undef bsearch
00094 #undef calloc
00095 #undef div
00096 #undef exit
00097 #undef free
00098 #undef getenv
00099 #undef labs
00100 #undef ldiv
00101 #undef malloc
00102 #undef mblen
00103 #undef mbstowcs
00104 #undef mbtowc
00105 #undef qsort
00106 #if __cplusplus >= 201103L
00107 # ifdef _GLIBCXX_HAVE_QUICK_EXIT
00108 #  undef quick_exit
00109 # endif
00110 #endif
00111 #undef rand
00112 #undef realloc
00113 #undef srand
00114 #undef strtod
00115 #undef strtol
00116 #undef strtoul
00117 #undef system
00118 #undef wcstombs
00119 #undef wctomb
00120 
00121 extern "C++"
00122 {
00123 namespace std _GLIBCXX_VISIBILITY(default)
00124 {
00125 _GLIBCXX_BEGIN_NAMESPACE_VERSION
00126 
00127   using ::div_t;
00128   using ::ldiv_t;
00129 
00130   using ::abort;
00131 #if __cplusplus >= 201703L && defined(_GLIBCXX_HAVE_ALIGNED_ALLOC)
00132   using ::aligned_alloc;
00133 #endif
00134   using ::atexit;
00135 #if __cplusplus >= 201103L
00136 # ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
00137   using ::at_quick_exit;
00138 # endif
00139 #endif
00140   using ::atof;
00141   using ::atoi;
00142   using ::atol;
00143   using ::bsearch;
00144   using ::calloc;
00145   using ::div;
00146   using ::exit;
00147   using ::free;
00148   using ::getenv;
00149   using ::labs;
00150   using ::ldiv;
00151   using ::malloc;
00152 #ifdef _GLIBCXX_HAVE_MBSTATE_T
00153   using ::mblen;
00154   using ::mbstowcs;
00155   using ::mbtowc;
00156 #endif // _GLIBCXX_HAVE_MBSTATE_T
00157   using ::qsort;
00158 #if __cplusplus >= 201103L
00159 # ifdef _GLIBCXX_HAVE_QUICK_EXIT
00160   using ::quick_exit;
00161 # endif
00162 #endif
00163   using ::rand;
00164   using ::realloc;
00165   using ::srand;
00166   using ::strtod;
00167   using ::strtol;
00168   using ::strtoul;
00169   using ::system;
00170 #ifdef _GLIBCXX_USE_WCHAR_T
00171   using ::wcstombs;
00172   using ::wctomb;
00173 #endif // _GLIBCXX_USE_WCHAR_T
00174 
00175 #ifndef __CORRECT_ISO_CPP_STDLIB_H_PROTO
00176   inline ldiv_t
00177   div(long __i, long __j) { return ldiv(__i, __j); }
00178 #endif
00179 
00180 
00181 _GLIBCXX_END_NAMESPACE_VERSION
00182 } // namespace
00183 
00184 #if _GLIBCXX_USE_C99_STDLIB
00185 
00186 #undef _Exit
00187 #undef llabs
00188 #undef lldiv
00189 #undef atoll
00190 #undef strtoll
00191 #undef strtoull
00192 #undef strtof
00193 #undef strtold
00194 
00195 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
00196 {
00197 _GLIBCXX_BEGIN_NAMESPACE_VERSION
00198 
00199 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
00200   using ::lldiv_t;
00201 #endif
00202 #if _GLIBCXX_USE_C99_CHECK || _GLIBCXX_USE_C99_DYNAMIC
00203   extern "C" void (_Exit)(int) throw () _GLIBCXX_NORETURN;
00204 #endif
00205 #if !_GLIBCXX_USE_C99_DYNAMIC
00206   using ::_Exit;
00207 #endif
00208 
00209 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
00210   using ::llabs;
00211 
00212   inline lldiv_t
00213   div(long long __n, long long __d)
00214   { lldiv_t __q; __q.quot = __n / __d; __q.rem = __n % __d; return __q; }
00215 
00216   using ::lldiv;
00217 #endif
00218 
00219 #if _GLIBCXX_USE_C99_LONG_LONG_CHECK || _GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
00220   extern "C" long long int (atoll)(const char *) throw ();
00221   extern "C" long long int
00222     (strtoll)(const char * __restrict, char ** __restrict, int) throw ();
00223   extern "C" unsigned long long int
00224     (strtoull)(const char * __restrict, char ** __restrict, int) throw ();
00225 #endif
00226 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
00227   using ::atoll;
00228   using ::strtoll;
00229   using ::strtoull;
00230 #endif
00231   using ::strtof;
00232   using ::strtold;
00233 
00234 _GLIBCXX_END_NAMESPACE_VERSION
00235 } // namespace __gnu_cxx
00236 
00237 namespace std
00238 {
00239 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
00240   using ::__gnu_cxx::lldiv_t;
00241 #endif
00242   using ::__gnu_cxx::_Exit;
00243 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
00244   using ::__gnu_cxx::llabs;
00245   using ::__gnu_cxx::div;
00246   using ::__gnu_cxx::lldiv;
00247 #endif
00248   using ::__gnu_cxx::atoll;
00249   using ::__gnu_cxx::strtof;
00250   using ::__gnu_cxx::strtoll;
00251   using ::__gnu_cxx::strtoull;
00252   using ::__gnu_cxx::strtold;
00253 } // namespace std
00254 
00255 #endif // _GLIBCXX_USE_C99_STDLIB
00256 
00257 } // extern "C++"
00258 
00259 #endif // !_GLIBCXX_HOSTED
00260 
00261 #endif