diff options
Diffstat (limited to 'gcc-4.2.1/gcc/ada/g-calend.adb')
-rw-r--r-- | gcc-4.2.1/gcc/ada/g-calend.adb | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/g-calend.adb b/gcc-4.2.1/gcc/ada/g-calend.adb new file mode 100644 index 000000000..ea8f28a3a --- /dev/null +++ b/gcc-4.2.1/gcc/ada/g-calend.adb @@ -0,0 +1,313 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- G N A T . C A L E N D A R -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1999-2005, AdaCore -- +-- -- +-- 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 body GNAT.Calendar is + + use Ada.Calendar; + use Interfaces; + + ----------------- + -- Day_In_Year -- + ----------------- + + function Day_In_Year (Date : Time) return Day_In_Year_Number is + Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Dsecs : Day_Duration; + + begin + Split (Date, Year, Month, Day, Dsecs); + + return Julian_Day (Year, Month, Day) - Julian_Day (Year, 1, 1) + 1; + end Day_In_Year; + + ----------------- + -- Day_Of_Week -- + ----------------- + + function Day_Of_Week (Date : Time) return Day_Name is + Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Dsecs : Day_Duration; + + begin + Split (Date, Year, Month, Day, Dsecs); + + return Day_Name'Val ((Julian_Day (Year, Month, Day)) mod 7); + end Day_Of_Week; + + ---------- + -- Hour -- + ---------- + + function Hour (Date : Time) return Hour_Number is + Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Hour : Hour_Number; + Minute : Minute_Number; + Second : Second_Number; + Sub_Second : Second_Duration; + + begin + Split (Date, Year, Month, Day, Hour, Minute, Second, Sub_Second); + return Hour; + end Hour; + + ---------------- + -- Julian_Day -- + ---------------- + + -- Julian_Day is used to by Day_Of_Week and Day_In_Year. Note + -- that this implementation is not expensive. + + function Julian_Day + (Year : Year_Number; + Month : Month_Number; + Day : Day_Number) return Integer + is + Internal_Year : Integer; + Internal_Month : Integer; + Internal_Day : Integer; + Julian_Date : Integer; + C : Integer; + Ya : Integer; + + begin + Internal_Year := Integer (Year); + Internal_Month := Integer (Month); + Internal_Day := Integer (Day); + + if Internal_Month > 2 then + Internal_Month := Internal_Month - 3; + else + Internal_Month := Internal_Month + 9; + Internal_Year := Internal_Year - 1; + end if; + + C := Internal_Year / 100; + Ya := Internal_Year - (100 * C); + + Julian_Date := (146_097 * C) / 4 + + (1_461 * Ya) / 4 + + (153 * Internal_Month + 2) / 5 + + Internal_Day + 1_721_119; + + return Julian_Date; + end Julian_Day; + + ------------ + -- Minute -- + ------------ + + function Minute (Date : Time) return Minute_Number is + Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Hour : Hour_Number; + Minute : Minute_Number; + Second : Second_Number; + Sub_Second : Second_Duration; + + begin + Split (Date, Year, Month, Day, Hour, Minute, Second, Sub_Second); + return Minute; + end Minute; + + ------------ + -- Second -- + ------------ + + function Second (Date : Time) return Second_Number is + Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Hour : Hour_Number; + Minute : Minute_Number; + Second : Second_Number; + Sub_Second : Second_Duration; + + begin + Split (Date, Year, Month, Day, Hour, Minute, Second, Sub_Second); + return Second; + end Second; + + ----------- + -- Split -- + ----------- + + procedure Split + (Date : Time; + Year : out Year_Number; + Month : out Month_Number; + Day : out Day_Number; + Hour : out Hour_Number; + Minute : out Minute_Number; + Second : out Second_Number; + Sub_Second : out Second_Duration) + is + Dsecs : Day_Duration; + Secs : Natural; + + begin + Split (Date, Year, Month, Day, Dsecs); + + if Dsecs = 0.0 then + Secs := 0; + else + Secs := Natural (Dsecs - 0.5); + end if; + + Sub_Second := Second_Duration (Dsecs - Day_Duration (Secs)); + Hour := Hour_Number (Secs / 3600); + Secs := Secs mod 3600; + Minute := Minute_Number (Secs / 60); + Second := Second_Number (Secs mod 60); + end Split; + + ---------------- + -- Sub_Second -- + ---------------- + + function Sub_Second (Date : Time) return Second_Duration is + Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Hour : Hour_Number; + Minute : Minute_Number; + Second : Second_Number; + Sub_Second : Second_Duration; + + begin + Split (Date, Year, Month, Day, Hour, Minute, Second, Sub_Second); + return Sub_Second; + end Sub_Second; + + ------------- + -- Time_Of -- + ------------- + + function Time_Of + (Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Hour : Hour_Number; + Minute : Minute_Number; + Second : Second_Number; + Sub_Second : Second_Duration := 0.0) return Time + is + Dsecs : constant Day_Duration := + Day_Duration (Hour * 3600 + Minute * 60 + Second) + + Sub_Second; + begin + return Time_Of (Year, Month, Day, Dsecs); + end Time_Of; + + ----------------- + -- To_Duration -- + ----------------- + + function To_Duration (T : access timeval) return Duration is + + procedure timeval_to_duration + (T : access timeval; + sec : access C.long; + usec : access C.long); + pragma Import (C, timeval_to_duration, "__gnat_timeval_to_duration"); + + Micro : constant := 10**6; + sec : aliased C.long; + usec : aliased C.long; + + begin + timeval_to_duration (T, sec'Access, usec'Access); + return Duration (sec) + Duration (usec) / Micro; + end To_Duration; + + ---------------- + -- To_Timeval -- + ---------------- + + function To_Timeval (D : Duration) return timeval is + + procedure duration_to_timeval (Sec, Usec : C.long; T : access timeval); + pragma Import (C, duration_to_timeval, "__gnat_duration_to_timeval"); + + Micro : constant := 10**6; + Result : aliased timeval; + sec : C.long; + usec : C.long; + + begin + if D = 0.0 then + sec := 0; + usec := 0; + else + sec := C.long (D - 0.5); + usec := C.long ((D - Duration (sec)) * Micro - 0.5); + end if; + + duration_to_timeval (sec, usec, Result'Access); + + return Result; + end To_Timeval; + + ------------------ + -- Week_In_Year -- + ------------------ + + function Week_In_Year + (Date : Ada.Calendar.Time) return Week_In_Year_Number + is + Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Hour : Hour_Number; + Minute : Minute_Number; + Second : Second_Number; + Sub_Second : Second_Duration; + Offset : Natural; + + begin + Split (Date, Year, Month, Day, Hour, Minute, Second, Sub_Second); + + -- Day offset number for the first week of the year + + Offset := Julian_Day (Year, 1, 1) mod 7; + + return 1 + ((Day_In_Year (Date) - 1) + Offset) / 7; + end Week_In_Year; + +end GNAT.Calendar; |