Mercurial > hg > CbC > CbC_gcc
diff gcc/ada/libgnat/s-ransee.adb @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
parents | |
children | 84e7813d76e9 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/ada/libgnat/s-ransee.adb Fri Oct 27 22:46:09 2017 +0900 @@ -0,0 +1,55 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- S Y S T E M . R A N D O M _ S E E D -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 2011-2017, Free Software Foundation, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- Version used on all systems except Ravenscar where Calendar is unavailable + +with Ada.Calendar; use Ada.Calendar; +with Ada.Unchecked_Conversion; + +package body System.Random_Seed is + + Y2K : constant Time := + Time_Of (Year => 2000, Month => 1, Day => 1, Seconds => 0.0); + -- First day of Year 2000, to get a duration + + function To_U64 is + new Ada.Unchecked_Conversion (Duration, Interfaces.Unsigned_64); + + -------------- + -- Get_Seed -- + -------------- + + function Get_Seed return Interfaces.Unsigned_64 is + begin + return To_U64 (Clock - Y2K); + end Get_Seed; + +end System.Random_Seed;