1------------------------------------------------------------------------------ 2-- -- 3-- Matreshka Project -- 4-- -- 5-- Localization, Internationalization, Globalization for Ada -- 6-- -- 7-- Runtime Library Component -- 8-- -- 9------------------------------------------------------------------------------ 10-- -- 11-- Copyright © 2011-2013, Vadim Godunko <vgodunko@gmail.com> -- 12-- All rights reserved. -- 13-- -- 14-- Redistribution and use in source and binary forms, with or without -- 15-- modification, are permitted provided that the following conditions -- 16-- are met: -- 17-- -- 18-- * Redistributions of source code must retain the above copyright -- 19-- notice, this list of conditions and the following disclaimer. -- 20-- -- 21-- * Redistributions in binary form must reproduce the above copyright -- 22-- notice, this list of conditions and the following disclaimer in the -- 23-- documentation and/or other materials provided with the distribution. -- 24-- -- 25-- * Neither the name of the Vadim Godunko, IE nor the names of its -- 26-- contributors may be used to endorse or promote products derived from -- 27-- this software without specific prior written permission. -- 28-- -- 29-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -- 30-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -- 31-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -- 32-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -- 33-- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -- 34-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED -- 35-- TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR -- 36-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF -- 37-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING -- 38-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS -- 39-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -- 40-- -- 41------------------------------------------------------------------------------ 42-- $Revision: 3663 $ $Date: 2013-01-20 22:32:29 +0400 (Sun, 20 Jan 2013) $ 43------------------------------------------------------------------------------ 44with Interfaces; 45 46package Matreshka.Internals.Calendars is 47 48 pragma Preelaborate; 49 50 -- Universal Time Coordinated (UTC) representation from the X/Open DCE Time 51 -- Service is used as internal representation. It is defined as follows: 52 -- 53 -- Time units 100 nanoseconds (10-7 seconds) 54 -- 55 -- Base time 15 October 1582 00:00:00. 56 -- 57 -- Approximate range AD 30,000 58 -- 59 -- UTC time in this implementation always refers to time in Greenwich Time 60 -- Zone. 61 62 type Absolute_Time is new Interfaces.Integer_64; 63 64 -- The corresponding internal representations of relative time is the same 65 -- one as for absolute time, and hence with similar characteristics: 66 -- 67 -- Time units 100 nanoseconds (10-7 seconds) 68 -- 69 -- Approximate range +/- 30,000 years 70 71 type Relative_Time is new Interfaces.Integer_64; 72 73 type Julian_Day_Number is new Interfaces.Integer_32; 74 75 type Zone_Record is record 76 From : Absolute_Time; 77 Offset : Relative_Time; 78 end record; 79 80 type Zone_Array is array (Positive range <>) of Zone_Record; 81 82 type Internal_Time_Zone (Length : Natural) is record 83 Data : Zone_Array (1 .. Length); 84 end record; 85 86 type Time_Zone_Access is access all Internal_Time_Zone; 87 for Time_Zone_Access'Storage_Size use 0; 88 89 UTC_Time_Zone : aliased Internal_Time_Zone (0); 90 91end Matreshka.Internals.Calendars; 92