diff options
Diffstat (limited to 'gcc-4.7/gcc/ada/a-calend-vms.ads')
| -rw-r--r-- | gcc-4.7/gcc/ada/a-calend-vms.ads | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/gcc-4.7/gcc/ada/a-calend-vms.ads b/gcc-4.7/gcc/ada/a-calend-vms.ads new file mode 100644 index 000000000..56c98697b --- /dev/null +++ b/gcc-4.7/gcc/ada/a-calend-vms.ads @@ -0,0 +1,270 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- A D A . C A L E N D A R -- +-- -- +-- S p e c -- +-- -- +-- 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 -- +-- apply solely to the contents of the part following the private keyword. -- +-- -- +-- 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 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. -- +-- -- +-- 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; + + type Time is private; + + -- Declarations representing limits of allowed local time values. Note + -- that these do NOT constrain the possible stored values of time which + -- may well permit a larger range of times (this is explicitly allowed + -- in Ada 95). + + subtype Year_Number is Integer range 1901 .. 2399; + subtype Month_Number is Integer range 1 .. 12; + subtype Day_Number is Integer range 1 .. 31; + + subtype Day_Duration is Duration range 0.0 .. 86_400.0; + + function Clock return Time; + + function Year (Date : Time) return Year_Number; + function Month (Date : Time) return Month_Number; + function Day (Date : Time) return Day_Number; + function Seconds (Date : Time) return Day_Duration; + + procedure Split + (Date : Time; + Year : out Year_Number; + Month : out Month_Number; + Day : out Day_Number; + Seconds : out Day_Duration); + + function Time_Of + (Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Seconds : Day_Duration := 0.0) return Time; + + function "+" (Left : Time; Right : Duration) return Time; + function "+" (Left : Duration; Right : Time) return Time; + function "-" (Left : Time; Right : Duration) return Time; + function "-" (Left : Time; Right : Time) return Duration; + + function "<" (Left, Right : Time) return Boolean; + function "<=" (Left, Right : Time) return Boolean; + function ">" (Left, Right : Time) return Boolean; + function ">=" (Left, Right : Time) return Boolean; + + Time_Error : exception; + +private + pragma Inline (Clock); + + pragma Inline (Year); + pragma Inline (Month); + pragma Inline (Day); + + pragma Inline ("+"); + pragma Inline ("-"); + + pragma Inline ("<"); + pragma Inline ("<="); + pragma Inline (">"); + pragma Inline (">="); + + -- Although the units are 100 nanoseconds, for the purpose of better + -- 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; + + -- Time is represented as the number of 100-nanosecond (ns) units from the + -- 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 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. + + -- Notwithstanding this definition, Time is not quite the same as OS_Time. + -- Relative Time is positive, whereas relative OS_Time is negative, + -- but this declaration makes for easier conversion. + + type Time is new OSP.OS_Time; + + Days_In_Month : constant array (Month_Number) of Day_Number := + (31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); + + Invalid_Time_Zone_Offset : Long_Integer; + pragma Import (C, Invalid_Time_Zone_Offset, "__gnat_invalid_tzoff"); + + function Is_Leap (Year : Year_Number) return Boolean; + -- Determine whether a given year is leap + + -- The following packages provide a target independent interface to the + -- children of Calendar - Arithmetic, Formatting and Time_Zones. + + -- 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 a certain number of days to a time value + + procedure Difference + (Left : Time; + Right : Time; + Days : out Long_Integer; + Seconds : out Duration; + Leap_Seconds : out Integer); + -- Calculate the difference between two time values in terms of days, + -- seconds and leap seconds elapsed. The leap seconds are not included + -- in the seconds returned. If Left is greater than Right, the returned + -- values are positive, negative otherwise. + + function Subtract (Date : Time; Days : Long_Integer) return Time; + -- 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; + 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; + Month : Month_Number; + Day : Day_Number; + Day_Secs : Day_Duration; + Hour : Integer; + Minute : Integer; + Second : Integer; + Sub_Sec : Duration; + 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; |