gcc/ada/libgnat/g-timsta.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                       G N A T . T I M E _ S T A M P                      --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2008-2018, Free Software Foundation, Inc.        --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 with Interfaces.C; use Interfaces.C;
  33
  34 package body GNAT.Time_Stamp is
  35
  36    subtype time_stamp is char_array (0 .. 22);
  37    type time_stamp_ptr is access all time_stamp;
  38    --  The desired ISO 8601 string format has exactly 22 characters. We add
  39    --  one additional character for '\0'. The indexing starts from zero to
  40    --  accommodate the C layout.
  41
  42    procedure gnat_current_time_string (Value : time_stamp_ptr);
  43    pragma Import (C, gnat_current_time_string, "__gnat_current_time_string");
  44
  45    ------------------
  46    -- Current_Time --
  47    ------------------
  48
  49    function Current_Time return String is
  50       Result : aliased time_stamp;
  51
  52    begin
  53       gnat_current_time_string (Result'Unchecked_Access);
  54       Result (22) := nul;
  55
  56       return To_Ada (Result);
  57    end Current_Time;
  58
  59 end GNAT.Time_Stamp;