libstdc++-v3/include/c_std/bits/std_ctime.h

   1 // -*- C++ -*- header wrapper.
   2
   3 // Copyright (C) 1997-1999, 2000 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 2, 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 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 //
  31 // ISO C++ 14882: 20.5  Date and time
  32 //
  33
  34 #ifndef _CPP_CTIME
  35 #define _CPP_CTIME 1
  36
  37 # ifdef _IN_C_LEGACY_  /* sub-included by a C header */
  38       // get out of the "legacy"
  39     } // close extern "C"
  40   }   // close namespace _C_legacy::
  41 #  undef _IN_C_LEGACY_
  42 #  define _TIME_NEED_C_LEGACY_
  43 # endif
  44
  45 # include <bits/std_cstddef.h>
  46
  47 namespace _C_legacy {
  48   extern "C" {
  49 #   define _IN_C_LEGACY_
  50 #   pragma GCC system_header
  51
  52       // XXX
  53       // glibc 2.1.x time.h is on crack
  54 #   undef __need_time_t
  55 #   undef __need_clock_t
  56 #   undef __need_timespec
  57
  58 #   include_next <time.h>
  59   }
  60
  61   typedef clock_t       _CPP_clock_t_capture;
  62   typedef time_t        _CPP_time_t_capture;
  63   typedef tm            _CPP_tm_capture;
  64
  65 } // namespace _C_legacy
  66
  67 #  undef clock_t
  68 #  undef time_t
  69 #  undef tm
  70 #  undef clock
  71 #  undef difftime
  72 #  undef mktime
  73 #  undef time
  74 #  undef asctime
  75 #  undef ctime
  76 #  undef gmtime
  77 #  undef localtime
  78 #  undef strftime
  79
  80 namespace std {
  81
  82   // Adopt C names into std::
  83   typedef _C_legacy::_CPP_clock_t_capture  clock_t;
  84   typedef _C_legacy::_CPP_time_t_capture   time_t;
  85   struct tm : _C_legacy::_CPP_tm_capture  { };
  86
  87   using _C_legacy::clock;
  88   using _C_legacy::difftime;
  89   using _C_legacy::mktime;
  90   using _C_legacy::time;
  91   using _C_legacy::ctime;
  92
  93   inline char*
  94   asctime(const tm* __t)
  95   { return _C_legacy::asctime(static_cast<_C_legacy::_CPP_tm_capture const*>(__t)); }
  96
  97   inline tm*
  98   gmtime(time_t const* __tp)
  99   { return reinterpret_cast<tm*>(_C_legacy::gmtime(__tp)); }
 100
 101   inline tm*
 102   localtime(const time_t* __tp)
 103   { return reinterpret_cast<tm*>(_C_legacy::localtime(__tp)); }
 104
 105   inline size_t
 106   strftime(char* __buf, size_t __maxsz, char const* __fmt, tm const* __tp)
 107   { return _C_legacy::strftime(__buf, __maxsz, __fmt,
 108                        static_cast<_C_legacy::_CPP_tm_capture const*>(__tp)); }
 109
 110 } // namespace std
 111
 112 # undef _IN_C_LEGACY_
 113
 114   // Expose global C names, including non-standard ones, but shadow
 115   // some names and types with the std:: C++ version.
 116   using std::clock_t;
 117   using std::time_t;
 118   using std::tm;
 119
 120   using std::clock;
 121   using std::difftime;
 122   using std::mktime;
 123   using std::time;
 124   using std::asctime;
 125   using std::ctime;
 126   using std::gmtime;
 127   using std::localtime;
 128   using std::strftime;
 129
 130 # ifdef _TIME_NEED_C_LEGACY_
 131   // dive back into the "swamp"
 132   namespace _C_legacy {
 133     extern "C" {
 134 #  define _IN_C_LEGACY_
 135 #  undef _TIME_NEED_C_LEGACY_
 136 # endif /* _TIME_NEED_C_LEGACY_ */
 137
 138 #endif /*_CPP_CTIME*/
 139
 140