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|
------------------------------------------------------------------------------
-- --
-- FLORIST (FSU Implementation of POSIX.5) COMPONENTS --
-- --
-- P O S I X . C A L E N D A R --
-- --
-- B o d y --
-- --
-- --
-- Copyright (c) 1996 Florida State University (FSU), All Rights Reserved. --
-- Copyright (C) 1998-2012, AdaCore --
-- --
-- This file is a component of FLORIST, an implementation of an Ada API --
-- for the POSIX OS services, for use with the GNAT Ada compiler and --
-- the FSU Gnu Ada Runtime Library (GNARL). The interface is intended --
-- to be close to that specified in IEEE STD 1003.5: 1990 and IEEE STD --
-- 1003.5b: 1996. --
-- --
-- FLORIST is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 2, or (at your option) any --
-- later version. FLORIST is distributed in the hope that it will be --
-- useful, but WITHOUT ANY WARRANTY; without even the implied warranty --
-- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. You should have received a --
-- copy of the GNU General Public License distributed with GNARL; see --
-- file COPYING. If not, write to the Free Software Foundation, 59 --
-- Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
------------------------------------------------------------------------------
-- Note: we used to call c_time in order to keep some compatibility with
-- POSIX.Files.Set_File_Times, but this seems obsolete now with modern
-- file systems, and having a fine grain precision is more important anyway.
with Unchecked_Conversion;
package body POSIX.Calendar is
package AC renames Standard.Calendar;
use Standard.Calendar;
POSIX_Epoch : constant Duration :=
AC.Time_Of (Year => 2150, Month => 1, Day => 1) -
AC.Time_Of (Year => 1970, Month => 1, Day => 1);
-- Time difference between POSIX and GNAT notion of time, measured as a
-- duration since the Ada mid point
pragma Warnings (Off);
-- Disable warning that the representation of Time values may
-- change between GNAT versions.
function Duration_To_POSIX_Time is new
Unchecked_Conversion (Duration, POSIX_Time);
function POSIX_Time_To_Duration is new
Unchecked_Conversion (POSIX_Time, Duration);
pragma Warnings (On);
-------------
-- Clock --
-------------
function Clock return POSIX_Time is
begin
return To_POSIX_Time (AC.Clock);
end Clock;
---------------
-- To_Time --
---------------
function To_Time (Date : POSIX_Time) return AC.Time is
begin
return AC.Time (Date) - POSIX_Epoch;
end To_Time;
---------------------
-- To_POSIX_Time --
---------------------
function To_POSIX_Time (Date : AC.Time) return POSIX_Time is
begin
return POSIX_Time (Date + POSIX_Epoch);
end To_POSIX_Time;
------------
-- Year --
------------
function Year (Date : POSIX_Time) return Year_Number is
begin
return Year_Number (AC.Year (To_Time (Date)));
end Year;
-------------
-- Month --
-------------
function Month (Date : POSIX_Time) return Month_Number is
begin
return AC.Month (To_Time (Date));
end Month;
-----------
-- Day --
-----------
function Day (Date : POSIX_Time) return Day_Number is
begin
return AC.Day (To_Time (Date));
end Day;
---------------
-- Seconds --
---------------
function Seconds (Date : POSIX_Time) return Day_Duration is
begin
return AC.Seconds (To_Time (Date));
end Seconds;
-------------
-- Split --
-------------
procedure Split
(Date : POSIX_Time;
Year : out Year_Number;
Month : out Month_Number;
Day : out Day_Number;
Seconds : out Day_Duration) is
begin
AC.Split (To_Time (Date), Year, Month, Day, Seconds);
end Split;
---------------
-- Time_Of --
---------------
function Time_Of
(Year : Year_Number;
Month : Month_Number;
Day : Day_Number;
Seconds : Day_Duration := 0.0) return POSIX_Time is
begin
return To_POSIX_Time (AC.Time_Of (Year, Month, Day, Seconds));
end Time_Of;
-----------
-- "+" --
-----------
function "+" (L : POSIX_Time; R : Duration) return POSIX_Time is
begin
return To_POSIX_Time (To_Time (L) + R);
end "+";
-----------
-- "+" --
-----------
function "+" (L : Duration; R : POSIX_Time) return POSIX_Time is
begin
return To_POSIX_Time (L + To_Time (R));
end "+";
-----------
-- "-" --
-----------
function "-" (L : POSIX_Time; R : Duration) return POSIX_Time is
begin
return To_POSIX_Time (To_Time (L) - R);
end "-";
-----------
-- "-" --
-----------
function "-" (L : POSIX_Time; R : POSIX_Time) return Duration is
begin
return To_Time (L) - To_Time (R);
end "-";
-----------
-- "<" --
-----------
function "<" (L, R : POSIX_Time) return Boolean is
begin
return To_Time (L) < To_Time (R);
end "<";
------------
-- "<=" --
------------
function "<=" (L, R : POSIX_Time) return Boolean is
begin
return To_Time (L) <= To_Time (R);
end "<=";
-----------
-- ">" --
-----------
function ">" (L, R : POSIX_Time) return Boolean is
begin
return To_Time (L) > To_Time (R);
end ">";
------------
-- ">=" --
------------
function ">=" (L, R : POSIX_Time) return Boolean is
begin
return To_Time (L) >= To_Time (R);
end ">=";
---------------------
-- To_POSIX_Time --
---------------------
function To_POSIX_Time (Date : POSIX.Timespec) return POSIX_Time is
begin
return Duration_To_POSIX_Time (POSIX.To_Duration (Date));
end To_POSIX_Time;
-------------------
-- To_Timespec --
-------------------
function To_Timespec (Date : POSIX_Time) return POSIX.Timespec is
begin
return POSIX.To_Timespec (POSIX_Time_To_Duration (Date));
end To_Timespec;
end POSIX.Calendar;
|
