libstdc++
cstdlib
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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 
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 
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 
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 ::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 
215 namespace __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 
257 namespace 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