libstdc++
ctime
Go to the documentation of this file.
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/ctime
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 time.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: 20.5 Date and time
37 //
38 
39 #pragma GCC system_header
40 
41 #include <bits/c++config.h>
42 #include <time.h>
43 
44 #ifndef _GLIBCXX_CTIME
45 #define _GLIBCXX_CTIME 1
46 
47 // Get rid of those macros defined in <time.h> in lieu of real functions.
48 #undef clock
49 #undef difftime
50 #undef mktime
51 #undef time
52 #undef asctime
53 #undef ctime
54 #undef gmtime
55 #undef localtime
56 #undef strftime
57 
58 namespace std
59 {
60  using ::clock_t;
61  using ::time_t;
62  using ::tm;
63 
64  using ::clock;
65  using ::difftime;
66  using ::mktime;
67  using ::time;
68  using ::asctime;
69  using ::ctime;
70  using ::gmtime;
71  using ::localtime;
72  using ::strftime;
73 } // namespace
74 
75 #endif
ISO C++ entities toplevel namespace is std.