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103 | ------------------------------------------------------------------------------
-- --
-- Matreshka Project --
-- --
-- Localization, Internationalization, Globalization for Ada --
-- --
-- Runtime Library Component --
-- --
------------------------------------------------------------------------------
-- --
-- Copyright © 2011-2013, Vadim Godunko <vgodunko@gmail.com> --
-- All rights reserved. --
-- --
-- Redistribution and use in source and binary forms, with or without --
-- modification, are permitted provided that the following conditions --
-- are met: --
-- --
-- * Redistributions of source code must retain the above copyright --
-- notice, this list of conditions and the following disclaimer. --
-- --
-- * Redistributions in binary form must reproduce the above copyright --
-- notice, this list of conditions and the following disclaimer in the --
-- documentation and/or other materials provided with the distribution. --
-- --
-- * Neither the name of the Vadim Godunko, IE nor the names of its --
-- contributors may be used to endorse or promote products derived from --
-- this software without specific prior written permission. --
-- --
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS --
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT --
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR --
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT --
-- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, --
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED --
-- TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR --
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF --
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING --
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS --
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. --
-- --
------------------------------------------------------------------------------
-- $Revision: 3957 $ $Date: 2013-06-30 13:14:44 +0400 (Вс, 30 июн 2013) $
------------------------------------------------------------------------------
with Ada.Calendar.Time_Zones;
with League.Calendars.ISO_8601;
package body League.Calendars.Ada_Conversions is
-------------------
-- From_Ada_Time --
-------------------
function From_Ada_Time (Item : Ada.Calendar.Time) return Date_Time is
use type Ada.Calendar.Time;
Offset : constant Ada.Calendar.Time_Zones.Time_Offset
:= Ada.Calendar.Time_Zones.UTC_Time_Offset (Item);
UTC : constant Ada.Calendar.Time := Item - Duration (Offset) * 60.0;
-- XXX Must be reviewed after implementation of timezone support.
-- Ada.Calendar.Time is local time and time zone conversion will be
-- applied automatically by League.Calendars.ISO_8601.Create.
Year : Ada.Calendar.Year_Number;
Month : Ada.Calendar.Month_Number;
Day : Ada.Calendar.Day_Number;
Seconds : Ada.Calendar.Day_Duration;
Whole_Seconds : Integer;
Hour : League.Calendars.ISO_8601.Hour_Number;
Minute : League.Calendars.ISO_8601.Minute_Number;
Second : League.Calendars.ISO_8601.Second_Number;
Fraction : League.Calendars.ISO_8601.Nanosecond_100_Number;
begin
Ada.Calendar.Split (UTC, Year, Month, Day, Seconds);
Whole_Seconds := Integer (Seconds - 0.5);
-- Conversion to integer uses mathematical rounding, so we need to
-- subtract by 0.5 to extract whole number of seconds.
Hour :=
League.Calendars.ISO_8601.Hour_Number (Whole_Seconds / 3_600);
Minute :=
League.Calendars.ISO_8601.Minute_Number
((Whole_Seconds / 60) mod 60);
Second :=
League.Calendars.ISO_8601.Second_Number (Whole_Seconds mod 60);
Fraction :=
League.Calendars.ISO_8601.Nanosecond_100_Number
((Seconds - Ada.Calendar.Day_Duration (Whole_Seconds))
* 10_000_000);
return
League.Calendars.ISO_8601.Create
(League.Calendars.ISO_8601.Year_Number (Year),
League.Calendars.ISO_8601.Month_Number (Month),
League.Calendars.ISO_8601.Day_Number (Day),
Hour,
Minute,
Second,
Fraction);
end From_Ada_Time;
end League.Calendars.Ada_Conversions;
|