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Diffstat (limited to 'gcc-4.2.1/gcc/ada/a-calend.ads')
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diff --git a/gcc-4.2.1/gcc/ada/a-calend.ads b/gcc-4.2.1/gcc/ada/a-calend.ads new file mode 100644 index 000000000..a394e2bbc --- /dev/null +++ b/gcc-4.2.1/gcc/ada/a-calend.ads @@ -0,0 +1,130 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- A D A . C A L E N D A R -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2005, 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 2, 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. -- +-- -- +-- 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. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +package Ada.Calendar is + + 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 .. 2099; + 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; + -- GNAT Note: Normally when procedure Split is called on a Time value + -- result of a call to function Time_Of, the out parameters of procedure + -- Split are identical to the in parameters of function Time_Of. However, + -- when a non-existent time of day is specified, the values for Seconds + -- may or may not be different. This may happen when Daylight Saving Time + -- (DST) is in effect, on the day when switching to DST, if Seconds + -- specifies a time of day in the hour that does not exist. For example, + -- in New York: + -- + -- Time_Of (Year => 1998, Month => 4, Day => 5, Seconds => 10740.0) + -- + -- will return a Time value T. If Split is called on T, the resulting + -- Seconds may be 14340.0 (3:59:00) instead of 10740.0 (2:59:00 being + -- a time that not exist). + + 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 (">="); + + -- Time is represented as a signed duration from the base point which is + -- what Unix calls the EPOCH (i.e. 12 midnight (24:00:00), Dec 31st, 1969, + -- or if you prefer 0:00:00 on Jan 1st, 1970). Since Ada allows dates + -- before this EPOCH value, the stored duration value may be negative. + + -- The time value stored is typically a GMT 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. The range of times that + -- can be stored in Time values depends on the declaration of the type + -- Duration, which must at least cover the required Ada range represented + -- by the declaration of Year_Number, but may be larger (we take full + -- advantage of the new permission in Ada 95 to store time values outside + -- the range that would be acceptable to Split). The Duration type is a + -- real value representing a time interval in seconds. + + type Time is new Duration; + +end Ada.Calendar; |