-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2007, 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. --
-- Time is represented as a signed 64 bit integer count of nanoseconds
-- since the start of Ada time (1901-01-01 00:00:00.0 UTC). Time values
- -- produced by Time_Of are internaly normalized to UTC regardless of their
+ -- produced by Time_Of are internally normalized to UTC regardless of their
-- local time zone. This representation ensures correct handling of leap
-- seconds as well as performing arithmetic. In Ada 95, Split and Time_Of
-- will treat a time value as being in the local time zone, in Ada 2005,
-- Due to Earth's slowdown, the astronomical time is not as precise as the
-- International Atomic Time. To compensate for this inaccuracy, a single
-- leap second is added after the last day of June or December. The count
- -- of seconds during those occurences becomes:
+ -- of seconds during those occurrences becomes:
-- ... 58, 59, leap second 60, 0, 1, 2 ...
-- aggregate generated by xleaps
-- The algorithms that build the actual leap second values and discover
- -- how many leap seconds have occured between two dates do not need any
+ -- how many leap seconds have occurred between two dates do not need any
-- modification.
------------------------------
- -- Non-leap centenial years --
+ -- Non-leap centennial years --
------------------------------
- -- Over the range of Ada time, centenial years 2100, 2200 and 2300 are
+ -- Over the range of Ada time, centennial years 2100, 2200 and 2300 are
-- non-leap. As a consequence, seven non-leap years occur over the period
- -- of year - 4 to year + 4. Internaly, routines Split and Time_Of add or
+ -- of year - 4 to year + 4. Internally, routines Split and Time_Of add or
-- subtract a "fake" February 29 to facilitate the arithmetic involved.
-- The underlying type of Time has been chosen to be a 64 bit signed
-- Determine whether a given year is leap
-- The following packages provide a target independent interface to the
- -- children of Calendar - Arithmetic, Delays, Formatting and Time_Zones.
+ -- children of Calendar - Arithmetic, Conversions, Delays, Formatting and
+ -- Time_Zones.
+
+ ---------------------------
+ -- Arithmetic_Operations --
+ ---------------------------
package Arithmetic_Operations is
+
function Add (Date : Time; Days : Long_Integer) return Time;
-- Add a certain number of days to a time value
function Subtract (Date : Time; Days : Long_Integer) return Time;
-- Subtract a certain number of days from a time value
+
end Arithmetic_Operations;
- package Delays_Operations is
+ ---------------------------
+ -- 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;
+
+ ----------------------
+ -- Delay_Operations --
+ ----------------------
+
+ package Delay_Operations is
+
function To_Duration (Date : Time) return Duration;
-- Given a time value in nanoseconds since 1901, convert it into a
-- duration value giving the number of nanoseconds since the Unix Epoch.
- end Delays_Operations;
+
+ end Delay_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).
Minute : Integer;
Second : Integer;
Sub_Sec : Duration;
- Leap_Sec : Boolean;
- Use_Day_Secs : Boolean;
- Is_Ada_05 : 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 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 UTC
+
end Time_Zones_Operations;
end Ada.Calendar;
OSDN Git Service
