cstdlib revision 1.1.1.4 
1// -*- C++ -*- forwarding header.
2
3// Copyright (C) 1997-2016 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
55namespace 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
78// Get rid of those macros defined in <stdlib.h> in lieu of real functions.
79#undef abort
80#undef abs
81#undef atexit
82#if __cplusplus >= 201103L
83# ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
84#  undef at_quick_exit
85# endif
86#endif
87#undef atof
88#undef atoi
89#undef atol
90#undef bsearch
91#undef calloc
92#undef div
93#undef exit
94#undef free
95#undef getenv
96#undef labs
97#undef ldiv
98#undef malloc
99#undef mblen
100#undef mbstowcs
101#undef mbtowc
102#undef qsort
103#if __cplusplus >= 201103L
104# ifdef _GLIBCXX_HAVE_QUICK_EXIT
105#  undef quick_exit
106# endif
107#endif
108#undef rand
109#undef realloc
110#undef srand
111#undef strtod
112#undef strtol
113#undef strtoul
114#undef system
115#undef wcstombs
116#undef wctomb
117
118extern "C++"
119{
120namespace std _GLIBCXX_VISIBILITY(default)
121{
122_GLIBCXX_BEGIN_NAMESPACE_VERSION
123
124  using ::div_t;
125  using ::ldiv_t;
126
127  using ::abort;
128  using ::abs;
129  using ::atexit;
130#if __cplusplus >= 201103L
131# ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
132  using ::at_quick_exit;
133# endif
134#endif
135  using ::atof;
136  using ::atoi;
137  using ::atol;
138  using ::bsearch;
139  using ::calloc;
140  using ::div;
141  using ::exit;
142  using ::free;
143  using ::getenv;
144  using ::labs;
145  using ::ldiv;
146  using ::malloc;
147#ifdef _GLIBCXX_HAVE_MBSTATE_T
148  using ::mblen;
149  using ::mbstowcs;
150  using ::mbtowc;
151#endif // _GLIBCXX_HAVE_MBSTATE_T
152  using ::qsort;
153#if __cplusplus >= 201103L
154# ifdef _GLIBCXX_HAVE_QUICK_EXIT
155  using ::quick_exit;
156# endif
157#endif
158  using ::rand;
159  using ::realloc;
160  using ::srand;
161  using ::strtod;
162  using ::strtol;
163  using ::strtoul;
164  using ::system;
165#ifdef _GLIBCXX_USE_WCHAR_T
166  using ::wcstombs;
167  using ::wctomb;
168#endif // _GLIBCXX_USE_WCHAR_T
169
170#ifndef __CORRECT_ISO_CPP_STDLIB_H_PROTO
171  inline long
172  abs(long __i) { return __builtin_labs(__i); }
173
174  inline ldiv_t
175  div(long __i, long __j) { return ldiv(__i, __j); }
176#endif
177
178#ifdef _GLIBCXX_USE_LONG_LONG
179  inline long long
180  abs(long long __x) { return __builtin_llabs (__x); }
181#endif
182
183#if defined(__GLIBCXX_TYPE_INT_N_0)
184  inline __GLIBCXX_TYPE_INT_N_0
185  abs(__GLIBCXX_TYPE_INT_N_0 __x) { return __x >= 0 ? __x : -__x; }
186#endif
187#if defined(__GLIBCXX_TYPE_INT_N_1)
188  inline __GLIBCXX_TYPE_INT_N_1
189  abs(__GLIBCXX_TYPE_INT_N_1 __x) { return __x >= 0 ? __x : -__x; }
190#endif
191#if defined(__GLIBCXX_TYPE_INT_N_2)
192  inline __GLIBCXX_TYPE_INT_N_2
193  abs(__GLIBCXX_TYPE_INT_N_2 __x) { return __x >= 0 ? __x : -__x; }
194#endif
195#if defined(__GLIBCXX_TYPE_INT_N_3)
196  inline __GLIBCXX_TYPE_INT_N_3
197  abs(__GLIBCXX_TYPE_INT_N_3 __x) { return __x >= 0 ? __x : -__x; }
198#endif
199
200
201_GLIBCXX_END_NAMESPACE_VERSION
202} // namespace
203
204#if _GLIBCXX_USE_C99_STDLIB
205
206#undef _Exit
207#undef llabs
208#undef lldiv
209#undef atoll
210#undef strtoll
211#undef strtoull
212#undef strtof
213#undef strtold
214
215namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
216{
217_GLIBCXX_BEGIN_NAMESPACE_VERSION
218
219#if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
220  using ::lldiv_t;
221#endif
222#if _GLIBCXX_USE_C99_CHECK || _GLIBCXX_USE_C99_DYNAMIC
223  extern "C" void (_Exit)(int) throw () _GLIBCXX_NORETURN;
224#endif
225#if !_GLIBCXX_USE_C99_DYNAMIC
226  using ::_Exit;
227#endif
228
229#if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
230  using ::llabs;
231
232  inline lldiv_t
233  div(long long __n, long long __d)
234  { lldiv_t __q; __q.quot = __n / __d; __q.rem = __n % __d; return __q; }
235
236  using ::lldiv;
237#endif
238
239#if _GLIBCXX_USE_C99_LONG_LONG_CHECK || _GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
240  extern "C" long long int (atoll)(const char *) throw ();
241  extern "C" long long int
242    (strtoll)(const char * __restrict, char ** __restrict, int) throw ();
243  extern "C" unsigned long long int
244    (strtoull)(const char * __restrict, char ** __restrict, int) throw ();
245#endif
246#if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
247  using ::atoll;
248  using ::strtoll;
249  using ::strtoull;
250#endif
251  using ::strtof;
252  using ::strtold;
253
254_GLIBCXX_END_NAMESPACE_VERSION
255} // namespace __gnu_cxx
256
257namespace std
258{
259#if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
260  using ::__gnu_cxx::lldiv_t;
261#endif
262  using ::__gnu_cxx::_Exit;
263#if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
264  using ::__gnu_cxx::llabs;
265  using ::__gnu_cxx::div;
266  using ::__gnu_cxx::lldiv;
267#endif
268  using ::__gnu_cxx::atoll;
269  using ::__gnu_cxx::strtof;
270  using ::__gnu_cxx::strtoll;
271  using ::__gnu_cxx::strtoull;
272  using ::__gnu_cxx::strtold;
273} // namespace std
274
275#endif // _GLIBCXX_USE_C99_STDLIB
276
277} // extern "C++"
278
279#endif // !_GLIBCXX_HOSTED
280
281#endif
282