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      1 // -*- C++ -*- forwarding header.
      2 
      3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
      4 // 2006, 2007, 2008, 2009, 2010
      5 // Free Software Foundation, Inc.
      6 //
      7 // This file is part of the GNU ISO C++ Library.  This library is free
      8 // software; you can redistribute it and/or modify it under the
      9 // terms of the GNU General Public License as published by the
     10 // Free Software Foundation; either version 3, or (at your option)
     11 // any later version.
     12 
     13 // This library is distributed in the hope that it will be useful,
     14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
     15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     16 // GNU General Public License for more details.
     17 
     18 // Under Section 7 of GPL version 3, you are granted additional
     19 // permissions described in the GCC Runtime Library Exception, version
     20 // 3.1, as published by the Free Software Foundation.
     21 
     22 // You should have received a copy of the GNU General Public License and
     23 // a copy of the GCC Runtime Library Exception along with this program;
     24 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     25 // <http://www.gnu.org/licenses/>.
     26 
     27 /** @file include/cstdlib
     28  *  This is a Standard C++ Library file.  You should @c \#include this file
     29  *  in your programs, rather than any of the @a *.h implementation files.
     30  *
     31  *  This is the C++ version of the Standard C Library header @c stdlib.h,
     32  *  and its contents are (mostly) the same as that header, but are all
     33  *  contained in the namespace @c std (except for names which are defined
     34  *  as macros in C).
     35  */
     36 
     37 //
     38 // ISO C++ 14882: 20.4.6  C library
     39 //
     40 
     41 #pragma GCC system_header
     42 
     43 #include <bits/c++config.h>
     44 
     45 #ifndef _GLIBCXX_CSTDLIB
     46 #define _GLIBCXX_CSTDLIB 1
     47 
     48 #if !_GLIBCXX_HOSTED
     49 // The C standard does not require a freestanding implementation to
     50 // provide <stdlib.h>.  However, the C++ standard does still require
     51 // <cstdlib> -- but only the functionality mentioned in
     52 // [lib.support.start.term].
     53 
     54 #define EXIT_SUCCESS 0
     55 #define EXIT_FAILURE 1
     56 
     57 namespace std
     58 {
     59   extern "C" void abort(void) throw () _GLIBCXX_NORETURN;
     60   extern "C" int atexit(void (*)()) throw ();
     61   extern "C" void exit(int) throw () _GLIBCXX_NORETURN;
     62 } // namespace std
     63 
     64 #else
     65 
     66 #include <stdlib.h>
     67 
     68 // Get rid of those macros defined in <stdlib.h> in lieu of real functions.
     69 #undef abort
     70 #undef abs
     71 #undef atexit
     72 #undef atof
     73 #undef atoi
     74 #undef atol
     75 #undef bsearch
     76 #undef calloc
     77 #undef div
     78 #undef exit
     79 #undef free
     80 #undef getenv
     81 #undef labs
     82 #undef ldiv
     83 #undef malloc
     84 #undef mblen
     85 #undef mbstowcs
     86 #undef mbtowc
     87 #undef qsort
     88 #undef rand
     89 #undef realloc
     90 #undef srand
     91 #undef strtod
     92 #undef strtol
     93 #undef strtoul
     94 #undef system
     95 #undef wcstombs
     96 #undef wctomb
     97 
     98 namespace std _GLIBCXX_VISIBILITY(default)
     99 {
    100 _GLIBCXX_BEGIN_NAMESPACE_VERSION
    101 
    102   using ::div_t;
    103   using ::ldiv_t;
    104 
    105   using ::abort;
    106   using ::abs;
    107   using ::atexit;
    108   using ::atof;
    109   using ::atoi;
    110   using ::atol;
    111   using ::bsearch;
    112   using ::calloc;
    113   using ::div;
    114   using ::exit;
    115   using ::free;
    116   using ::getenv;
    117   using ::labs;
    118   using ::ldiv;
    119   using ::malloc;
    120 #ifdef _GLIBCXX_HAVE_MBSTATE_T
    121   using ::mblen;
    122   using ::mbstowcs;
    123   using ::mbtowc;
    124 #endif // _GLIBCXX_HAVE_MBSTATE_T
    125   using ::qsort;
    126   using ::rand;
    127   using ::realloc;
    128   using ::srand;
    129   using ::strtod;
    130   using ::strtol;
    131   using ::strtoul;
    132   using ::system;
    133 #ifdef _GLIBCXX_USE_WCHAR_T
    134   using ::wcstombs;
    135   using ::wctomb;
    136 #endif // _GLIBCXX_USE_WCHAR_T
    137 
    138   inline long
    139   abs(long __i) { return labs(__i); }
    140 
    141   inline ldiv_t
    142   div(long __i, long __j) { return ldiv(__i, __j); }
    143 
    144 _GLIBCXX_END_NAMESPACE_VERSION
    145 } // namespace
    146 
    147 #if _GLIBCXX_USE_C99
    148 
    149 #undef _Exit
    150 #undef llabs
    151 #undef lldiv
    152 #undef atoll
    153 #undef strtoll
    154 #undef strtoull
    155 #undef strtof
    156 #undef strtold
    157 
    158 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
    159 {
    160 _GLIBCXX_BEGIN_NAMESPACE_VERSION
    161 
    162 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
    163   using ::lldiv_t;
    164 #endif
    165 #if _GLIBCXX_USE_C99_CHECK || _GLIBCXX_USE_C99_DYNAMIC
    166   extern "C" void (_Exit)(int) throw () _GLIBCXX_NORETURN;
    167 #endif
    168 #if !_GLIBCXX_USE_C99_DYNAMIC
    169   using ::_Exit;
    170 #endif
    171 
    172   inline long long
    173   abs(long long __x) { return __x >= 0 ? __x : -__x; }
    174 
    175 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
    176   using ::llabs;
    177 
    178   inline lldiv_t
    179   div(long long __n, long long __d)
    180   { lldiv_t __q; __q.quot = __n / __d; __q.rem = __n % __d; return __q; }
    181 
    182   using ::lldiv;
    183 #endif
    184 
    185 #if _GLIBCXX_USE_C99_LONG_LONG_CHECK || _GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
    186   extern "C" long long int (atoll)(const char *) throw ();
    187   extern "C" long long int
    188     (strtoll)(const char * __restrict, char ** __restrict, int) throw ();
    189   extern "C" unsigned long long int
    190     (strtoull)(const char * __restrict, char ** __restrict, int) throw ();
    191 #endif
    192 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
    193   using ::atoll;
    194   using ::strtoll;
    195   using ::strtoull;
    196 #endif
    197   using ::strtof;
    198   using ::strtold;
    199 
    200 _GLIBCXX_END_NAMESPACE_VERSION
    201 } // namespace __gnu_cxx
    202 
    203 namespace std
    204 {
    205 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
    206   using ::__gnu_cxx::lldiv_t;
    207 #endif
    208   using ::__gnu_cxx::_Exit;
    209   using ::__gnu_cxx::abs;
    210 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
    211   using ::__gnu_cxx::llabs;
    212   using ::__gnu_cxx::div;
    213   using ::__gnu_cxx::lldiv;
    214 #endif
    215   using ::__gnu_cxx::atoll;
    216   using ::__gnu_cxx::strtof;
    217   using ::__gnu_cxx::strtoll;
    218   using ::__gnu_cxx::strtoull;
    219   using ::__gnu_cxx::strtold;
    220 } // namespace std
    221 
    222 #ifdef __GXX_EXPERIMENTAL_CXX0X__
    223 
    224 namespace std
    225 {
    226 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
    227   // types
    228   using std::lldiv_t;
    229 
    230   // functions
    231   using std::llabs;
    232   using std::lldiv;
    233 #endif
    234 
    235   using std::atoll;
    236   using std::strtoll;
    237   using std::strtoull;
    238 
    239   using std::strtof;
    240   using std::strtold;
    241 
    242   // overloads
    243   using std::abs;
    244 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
    245   using std::div;
    246 #endif
    247 } // namespace std
    248 
    249 #endif // __GXX_EXPERIMENTAL_CXX0X__
    250 
    251 #endif // _GLIBCXX_USE_C99
    252 
    253 #endif // !_GLIBCXX_HOSTED
    254 
    255 #endif
    256