------------------------------------------------------------------------------ -- -- -- Matreshka Project -- -- -- -- Localization, Internationalization, Globalization for Ada -- -- -- -- Runtime Library Component -- -- -- ------------------------------------------------------------------------------ -- -- -- Copyright © 2011-2013, Vadim Godunko -- -- 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;