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-------------------------------------------------------------------------------
-- (C) Altran Praxis Limited
-------------------------------------------------------------------------------
--
-- The SPARK toolset is free software; you can redistribute it and/or modify it
-- under terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 3, or (at your option) any later
-- version. The SPARK toolset is distributed in the hope that it will be
-- useful, but WITHOUT 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 the SPARK toolset; see file
-- COPYING3. If not, go to http://www.gnu.org/licenses for a complete copy of
-- the license.
--
--=============================================================================
--------------------------------------------------------------------------------
--Synopsis: --
-- --
--Format the current date and time in the form: --
--24-DEC-1988 12:00:00.00 --
-- --
--Separate of Banner package --
--------------------------------------------------------------------------------
with Calendar;
separate (Banner)
procedure DateTime (DateString : out TypDateTime) is
--# hide DateTime;
--
-- FUNCTION :
--
-- Returns a string indicating the current date and time as a 23 character
-- string in the format 24-DEC-1988 12:00:00.00
--
-- OPERATION :
--
-- Uses the standard package CALENDAR.
--
MonthsInYear : constant := 12;
DaysInMonth : constant := 31;
HoursInDay : constant := 24;
MinutesInHour : constant := 60;
SecondsInMinute : constant := 60;
HundredthsInSecond : constant := 100;
type YearsType is range 1991 .. 2099;
--# assert YearsType'Base is Short_Integer;
type MonthsType is range 1 .. MonthsInYear;
--# assert MonthsType'Base is Short_Short_Integer;
type DaysType is range 1 .. DaysInMonth;
--# assert DaysType'Base is Short_Short_Integer;
type HoursType is range 0 .. HoursInDay - 1;
--# assert HoursType'Base is Short_Short_Integer;
type MinutesType is range 0 .. MinutesInHour - 1;
--# assert MinutesType'Base is Short_Short_Integer;
type SecondsType is range 0 .. SecondsInMinute - 1;
--# assert SecondsType'Base is Short_Short_Integer;
type HundredthsType is range 0 .. HundredthsInSecond - 1;
--# assert HundredthsType'Base is Short_Short_Integer;
subtype Digit is Natural range 0 .. 9;
Year : YearsType;
Month : MonthsType;
Day : DaysType;
Hours : HoursType;
Minutes : MinutesType;
Seconds : SecondsType;
Hundredths : HundredthsType;
procedure DecodeTime
(Time : in Calendar.Time;
Year : out YearsType;
Month : out MonthsType;
Day : out DaysType;
Hours : out HoursType;
Minutes : out MinutesType;
Seconds : out SecondsType;
Hundredths : out HundredthsType)
is
SystemTime : Duration;
procedure DecodeDuration
(Time : in Duration;
Hours : out HoursType;
Minutes : out MinutesType;
Seconds : out SecondsType;
Hundredths : out HundredthsType)
is
type TimeOfDay is range 0 .. HoursInDay * MinutesInHour * SecondsInMinute * HundredthsInSecond - 1;
--# assert Type'Base is Integer;
SystemTime : TimeOfDay;
begin
SystemTime := TimeOfDay (Time * Duration'(100.0));
Hours := HoursType (SystemTime / (MinutesInHour * SecondsInMinute * HundredthsInSecond));
Minutes := MinutesType (SystemTime / (SecondsInMinute * HundredthsInSecond) mod MinutesInHour);
Seconds := SecondsType (SystemTime / HundredthsInSecond mod SecondsInMinute);
Hundredths := HundredthsType (SystemTime mod HundredthsInSecond);
end DecodeDuration;
begin
Calendar.Split
(Date => Time,
Year => Calendar.Year_Number (Year),
Month => Calendar.Month_Number (Month),
Day => Calendar.Day_Number (Day),
Seconds => SystemTime);
DecodeDuration (SystemTime, Hours, Minutes, Seconds, Hundredths);
end DecodeTime;
function DigitImage (Value : Digit) return Character is
type DigitImages is array (Digit) of Character;
Image : constant DigitImages := DigitImages'('0', '1', '2', '3', '4', '5', '6', '7', '8', '9');
begin
return Image (Value);
end DigitImage;
function DateImage
(Day : DaysType;
Month : MonthsType;
Year : YearsType)
return String
is
function YearImage (Year : YearsType) return String is
DigitsInYear : constant := 4;
subtype DigitInYear is Positive range 1 .. DigitsInYear;
subtype ResultType is String (DigitInYear);
Result : ResultType;
function GetYearDigit (Year : YearsType;
Pos : DigitInYear) return Digit is
begin
return Digit (Year / 10 ** (DigitInYear'Last - Pos) mod 10);
end GetYearDigit;
begin
for I in DigitInYear loop
Result (I) := DigitImage (GetYearDigit (Year, I));
end loop;
return Result;
end YearImage;
function MonthImage (Month : MonthsType) return String is
CharactersInMonth : constant := 3;
subtype CharacterInMonth is Positive range 1 .. CharactersInMonth;
subtype MonthNames is String (CharacterInMonth);
type NamesOfMonths is array (MonthsType) of MonthNames;
Image : constant NamesOfMonths :=
NamesOfMonths'("JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC");
begin
return Image (Month);
end MonthImage;
function DayImage (Day : DaysType) return String is
DigitsInDay : constant := 2;
subtype DigitInDay is Positive range 1 .. DigitsInDay;
subtype ResultType is String (DigitInDay);
Result : ResultType;
function GetDayDigit (Day : DaysType;
Pos : DigitInDay) return Digit is
begin
return Digit (Day / 10 ** (DigitInDay'Last - Pos) mod 10);
end GetDayDigit;
begin
for I in DigitInDay loop
Result (I) := DigitImage (GetDayDigit (Day, I));
end loop;
return Result;
end DayImage;
begin
return DayImage (Day) & '-' & MonthImage (Month) & '-' & YearImage (Year);
end DateImage;
function TimeImage
(Hours : HoursType;
Minutes : MinutesType;
Seconds : SecondsType;
Hundredths : HundredthsType)
return String
is
function HourImage (Hour : HoursType) return String is
DigitsInHour : constant := 2;
subtype DigitInHour is Positive range 1 .. DigitsInHour;
subtype ResultType is String (DigitInHour);
Result : ResultType;
function GetHourDigit (Hour : HoursType;
Pos : DigitInHour) return Digit is
begin
return Digit (Hour / 10 ** (DigitInHour'Last - Pos) mod 10);
end GetHourDigit;
begin
for I in DigitInHour loop
Result (I) := DigitImage (GetHourDigit (Hour, I));
end loop;
return Result;
end HourImage;
function MinuteImage (Minute : MinutesType) return String is
DigitsInMinute : constant := 2;
subtype DigitInMinute is Positive range 1 .. DigitsInMinute;
subtype ResultType is String (DigitInMinute);
Result : ResultType;
function GetMinuteDigit (Minute : MinutesType;
Pos : DigitInMinute) return Digit is
begin
return Digit (Minute / 10 ** (DigitInMinute'Last - Pos) mod 10);
end GetMinuteDigit;
begin
for I in DigitInMinute loop
Result (I) := DigitImage (GetMinuteDigit (Minute, I));
end loop;
return Result;
end MinuteImage;
function SecondImage (Second : SecondsType) return String is
DigitsInSecond : constant := 2;
subtype DigitInSecond is Positive range 1 .. DigitsInSecond;
subtype ResultType is String (DigitInSecond);
Result : ResultType;
function GetSecondDigit (Second : SecondsType;
Pos : DigitInSecond) return Digit is
begin
return Digit (Second / 10 ** (DigitInSecond'Last - Pos) mod 10);
end GetSecondDigit;
begin
for I in DigitInSecond loop
Result (I) := DigitImage (GetSecondDigit (Second, I));
end loop;
return Result;
end SecondImage;
function HundredthImage (Hundredth : HundredthsType) return String is
DigitsInHundredth : constant := 2;
subtype DigitInHundredth is Positive range 1 .. DigitsInHundredth;
subtype ResultType is String (DigitInHundredth);
Result : ResultType;
function GetHundredthDigit (Hundredth : HundredthsType;
Pos : DigitInHundredth) return Digit is
begin
return Digit (Hundredth / 10 ** (DigitInHundredth'Last - Pos) mod 10);
end GetHundredthDigit;
begin
for I in DigitInHundredth loop
Result (I) := DigitImage (GetHundredthDigit (Hundredth, I));
end loop;
return Result;
end HundredthImage;
begin
return HourImage (Hours) & ':' & MinuteImage (Minutes) & ':' & SecondImage (Seconds) & '.' & HundredthImage (Hundredths);
end TimeImage;
begin
DecodeTime (Calendar.Clock, Year, Month, Day, Hours, Minutes, Seconds, Hundredths);
DateString := DateImage (Day, Month, Year) & ' ' & TimeImage (Hours, Minutes, Seconds, Hundredths);
end DateTime;
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