-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2006, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
-- --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- --
-- 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 2, or (at your option) any later ver- --
+-- 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. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
+-- 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. --
-- This is the Alpha/VMS version
with System.OS_Primitives;
+
package Ada.Calendar is
package OSP renames System.OS_Primitives;
-- readability, this unit will be called "mili".
Mili : constant := 10_000_000;
+ Mili_F : constant := 10_000_000.0;
Milis_In_Day : constant := 864_000_000_000;
Secs_In_Day : constant := 86_400;
-- system base date and time 1858-11-17 0.0 (the Smithsonian base date and
-- time for the astronomic calendar).
- -- The time value stored is typically a GMT value, as provided in standard
+ -- The time value stored is typically a UTC value, as provided in standard
-- Unix environments. If this is the case then Split and Time_Of perform
-- required conversions to and from local times.
type Time is new OSP.OS_Time;
- -- The range of Ada time expressed as milis since the VMS Epoch
-
- Ada_Low : constant Time := (10 * 366 + 32 * 365 + 45) * Milis_In_Day;
- Ada_High : constant Time := (131 * 366 + 410 * 365 + 45) * Milis_In_Day;
-
Days_In_Month : constant array (Month_Number) of Day_Number :=
(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
-- NOTE: Delays does not need a target independent interface because
-- VMS already has a target specific file for that package.
+ ---------------------------
+ -- Arithmetic_Operations --
+ ---------------------------
+
package Arithmetic_Operations is
+
function Add (Date : Time; Days : Long_Integer) return Time;
- -- Add X number of days to a time value
+ -- Add a certain number of days to a time value
procedure Difference
(Left : Time;
-- values are positive, negative otherwise.
function Subtract (Date : Time; Days : Long_Integer) return Time;
- -- Subtract X number of days from a time value
+ -- Subtract a certain number of days from a time value
+
end Arithmetic_Operations;
+ ---------------------------
+ -- Conversion_Operations --
+ ---------------------------
+
+ package Conversion_Operations is
+ function To_Ada_Time (Unix_Time : Long_Integer) return Time;
+ -- Unix to Ada Epoch conversion
+
+ function To_Ada_Time
+ (tm_year : Integer;
+ tm_mon : Integer;
+ tm_day : Integer;
+ tm_hour : Integer;
+ tm_min : Integer;
+ tm_sec : Integer;
+ tm_isdst : Integer) return Time;
+ -- Struct tm to Ada Epoch conversion
+
+ function To_Duration
+ (tv_sec : Long_Integer;
+ tv_nsec : Long_Integer) return Duration;
+ -- Struct timespec to Duration conversion
+
+ procedure To_Struct_Timespec
+ (D : Duration;
+ tv_sec : out Long_Integer;
+ tv_nsec : out Long_Integer);
+ -- Duration to struct timespec conversion
+
+ procedure To_Struct_Tm
+ (T : Time;
+ tm_year : out Integer;
+ tm_mon : out Integer;
+ tm_day : out Integer;
+ tm_hour : out Integer;
+ tm_min : out Integer;
+ tm_sec : out Integer);
+ -- Time to struct tm conversion
+
+ function To_Unix_Time (Ada_Time : Time) return Long_Integer;
+ -- Ada to Unix Epoch conversion
+
+ end Conversion_Operations;
+
+ ---------------------------
+ -- Formatting_Operations --
+ ---------------------------
+
package Formatting_Operations is
+
function Day_Of_Week (Date : Time) return Integer;
-- Determine which day of week Date falls on. The returned values are
-- within the range of 0 .. 6 (Monday .. Sunday).
procedure Split
- (Date : Time;
- Year : out Year_Number;
- Month : out Month_Number;
- Day : out Day_Number;
- Day_Secs : out Day_Duration;
- Hour : out Integer;
- Minute : out Integer;
- Second : out Integer;
- Sub_Sec : out Duration;
- Leap_Sec : out Boolean;
- Time_Zone : Long_Integer);
- -- Split a time value into its components
+ (Date : Time;
+ Year : out Year_Number;
+ Month : out Month_Number;
+ Day : out Day_Number;
+ Day_Secs : out Day_Duration;
+ Hour : out Integer;
+ Minute : out Integer;
+ Second : out Integer;
+ Sub_Sec : out Duration;
+ Leap_Sec : out Boolean;
+ Is_Ada_05 : Boolean;
+ Time_Zone : Long_Integer);
+ -- Split a time value into its components. Set Is_Ada_05 to use the
+ -- local time zone (the value in Time_Zone is ignored) when splitting
+ -- a time value.
function Time_Of
(Year : Year_Number;
Minute : Integer;
Second : Integer;
Sub_Sec : Duration;
- Leap_Sec : Boolean;
- Leap_Checks : Boolean;
- Use_Day_Secs : Boolean;
- Time_Zone : Long_Integer) return Time;
+ Leap_Sec : Boolean := False;
+ Use_Day_Secs : Boolean := False;
+ Is_Ada_05 : Boolean := False;
+ Time_Zone : Long_Integer := 0) return Time;
-- Given all the components of a date, return the corresponding time
-- value. Set Use_Day_Secs to use the value in Day_Secs, otherwise the
-- day duration will be calculated from Hour, Minute, Second and Sub_
- -- Sec. Set flag Leap_Checks to verify the validity of a leap second.
+ -- Sec. Set Is_Ada_05 to use the local time zone (the value in formal
+ -- Time_Zone is ignored) when building a time value and to verify the
+ -- validity of a requested leap second.
+
end Formatting_Operations;
+ ---------------------------
+ -- Time_Zones_Operations --
+ ---------------------------
+
package Time_Zones_Operations is
+
function UTC_Time_Offset (Date : Time) return Long_Integer;
- -- Return the offset in seconds from GMT
+ -- Return the offset in seconds from UTC
+
end Time_Zones_Operations;
end Ada.Calendar;
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