libstdc++
cstdlib
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1 // -*- C++ -*- forwarding header.
2 
3 // Copyright (C) 1997-2017 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 #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 
118 extern "C++"
119 {
120 namespace 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 ::atexit;
129 #if __cplusplus >= 201103L
130 # ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
131  using ::at_quick_exit;
132 # endif
133 #endif
134  using ::atof;
135  using ::atoi;
136  using ::atol;
137  using ::bsearch;
138  using ::calloc;
139  using ::div;
140  using ::exit;
141  using ::free;
142  using ::getenv;
143  using ::labs;
144  using ::ldiv;
145  using ::malloc;
146 #ifdef _GLIBCXX_HAVE_MBSTATE_T
147  using ::mblen;
148  using ::mbstowcs;
149  using ::mbtowc;
150 #endif // _GLIBCXX_HAVE_MBSTATE_T
151  using ::qsort;
152 #if __cplusplus >= 201103L
153 # ifdef _GLIBCXX_HAVE_QUICK_EXIT
154  using ::quick_exit;
155 # endif
156 #endif
157  using ::rand;
158  using ::realloc;
159  using ::srand;
160  using ::strtod;
161  using ::strtol;
162  using ::strtoul;
163  using ::system;
164 #ifdef _GLIBCXX_USE_WCHAR_T
165  using ::wcstombs;
166  using ::wctomb;
167 #endif // _GLIBCXX_USE_WCHAR_T
168 
169 #ifndef __CORRECT_ISO_CPP_STDLIB_H_PROTO
170  inline ldiv_t
171  div(long __i, long __j) { return ldiv(__i, __j); }
172 #endif
173 
174 
175 _GLIBCXX_END_NAMESPACE_VERSION
176 } // namespace
177 
178 #if _GLIBCXX_USE_C99_STDLIB
179 
180 #undef _Exit
181 #undef llabs
182 #undef lldiv
183 #undef atoll
184 #undef strtoll
185 #undef strtoull
186 #undef strtof
187 #undef strtold
188 
189 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
190 {
191 _GLIBCXX_BEGIN_NAMESPACE_VERSION
192 
193 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
194  using ::lldiv_t;
195 #endif
196 #if _GLIBCXX_USE_C99_CHECK || _GLIBCXX_USE_C99_DYNAMIC
197  extern "C" void (_Exit)(int) throw () _GLIBCXX_NORETURN;
198 #endif
199 #if !_GLIBCXX_USE_C99_DYNAMIC
200  using ::_Exit;
201 #endif
202 
203 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
204  using ::llabs;
205 
206  inline lldiv_t
207  div(long long __n, long long __d)
208  { lldiv_t __q; __q.quot = __n / __d; __q.rem = __n % __d; return __q; }
209 
210  using ::lldiv;
211 #endif
212 
213 #if _GLIBCXX_USE_C99_LONG_LONG_CHECK || _GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
214  extern "C" long long int (atoll)(const char *) throw ();
215  extern "C" long long int
216  (strtoll)(const char * __restrict, char ** __restrict, int) throw ();
217  extern "C" unsigned long long int
218  (strtoull)(const char * __restrict, char ** __restrict, int) throw ();
219 #endif
220 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
221  using ::atoll;
222  using ::strtoll;
223  using ::strtoull;
224 #endif
225  using ::strtof;
226  using ::strtold;
227 
228 _GLIBCXX_END_NAMESPACE_VERSION
229 } // namespace __gnu_cxx
230 
231 namespace std
232 {
233 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
234  using ::__gnu_cxx::lldiv_t;
235 #endif
236  using ::__gnu_cxx::_Exit;
237 #if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
238  using ::__gnu_cxx::llabs;
239  using ::__gnu_cxx::div;
240  using ::__gnu_cxx::lldiv;
241 #endif
242  using ::__gnu_cxx::atoll;
243  using ::__gnu_cxx::strtof;
244  using ::__gnu_cxx::strtoll;
245  using ::__gnu_cxx::strtoull;
246  using ::__gnu_cxx::strtold;
247 } // namespace std
248 
249 #endif // _GLIBCXX_USE_C99_STDLIB
250 
251 } // extern "C++"
252 
253 #endif // !_GLIBCXX_HOSTED
254 
255 #endif
ISO C++ entities toplevel namespace is std.
GNU extensions for public use.