forked from KolibriOS/kolibrios
140 lines
3.8 KiB
Plaintext
140 lines
3.8 KiB
Plaintext
(*
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Copyright 2016 Anton Krotov
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*)
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MODULE DateTime;
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IMPORT KOSAPI;
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CONST ERR* = -7.0D5;
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PROCEDURE Encode*(Year, Month, Day, Hour, Min, Sec: INTEGER): LONGREAL;
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VAR d, i: INTEGER; M: ARRAY 13 OF CHAR; Res: LONGREAL;
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BEGIN
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Res := ERR;
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IF (Year >= 1) & (Year <= 9999) & (Month >= 1) & (Month <= 12) &
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(Day >= 1) & (Day <= 31) & (Hour >= 0) & (Hour <= 23) &
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(Min >= 0) & (Min <= 59) & (Sec >= 0) & (Sec <= 59) THEN
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M := "_303232332323";
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IF (Year MOD 4 = 0) & (Year MOD 100 # 0) OR (Year MOD 400 = 0) THEN
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M[2] := "1"
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END;
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IF Day <= ORD(M[Month]) - ORD("0") + 28 THEN
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DEC(Year);
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d := Year * 365 + (Year DIV 4) - (Year DIV 100) + (Year DIV 400) + Day - 693594;
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FOR i := 1 TO Month - 1 DO
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d := d + ORD(M[i]) - ORD("0") + 28
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END;
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Res := LONG(FLT(d)) + LONG(FLT(Hour * 3600000 + Min * 60000 + Sec * 1000)) / 86400000.0D0
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END
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END
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RETURN Res
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END Encode;
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PROCEDURE Decode*(Date: LONGREAL; VAR Year, Month, Day, Hour, Min, Sec: INTEGER): BOOLEAN;
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VAR Res, flag: BOOLEAN; d, t, i: INTEGER; M: ARRAY 13 OF CHAR;
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PROCEDURE MonthDay(n: INTEGER): BOOLEAN;
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VAR Res: BOOLEAN;
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BEGIN
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Res := FALSE;
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IF d > ORD(M[n]) - ORD("0") + 28 THEN
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d := d - ORD(M[n]) + ORD("0") - 28;
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INC(Month);
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Res := TRUE
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END
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RETURN Res
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END MonthDay;
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BEGIN
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IF (Date >= -693593.0D0) & (Date < 2958466.0D0) THEN
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d := FLOOR(Date);
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t := FLOOR((Date - LONG(FLT(d))) * 86400000.0D0);
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d := d + 693593;
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Year := 1;
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Month := 1;
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WHILE d > 0 DO
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d := d - 365 - ORD((Year MOD 4 = 0) & (Year MOD 100 # 0) OR (Year MOD 400 = 0));
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INC(Year)
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END;
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IF d < 0 THEN
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DEC(Year);
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d := d + 365 + ORD((Year MOD 4 = 0) & (Year MOD 100 # 0) OR (Year MOD 400 = 0))
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END;
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INC(d);
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M := "_303232332323";
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IF (Year MOD 4 = 0) & (Year MOD 100 # 0) OR (Year MOD 400 = 0) THEN
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M[2] := "1"
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END;
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i := 1;
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flag := TRUE;
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WHILE flag & (i <= 12) DO
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flag := MonthDay(i);
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INC(i)
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END;
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Day := d;
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Hour := t DIV 3600000;
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t := t MOD 3600000;
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Min := t DIV 60000;
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t := t MOD 60000;
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Sec := t DIV 1000;
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Res := TRUE
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ELSE
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Res := FALSE
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END
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RETURN Res
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END Decode;
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PROCEDURE Now*(VAR Year, Month, Day, Hour, Min, Sec: INTEGER);
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VAR date, time: INTEGER;
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BEGIN
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date := KOSAPI.sysfunc1(29);
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time := KOSAPI.sysfunc1(3);
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Year := date MOD 16;
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date := date DIV 16;
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Year := (date MOD 16) * 10 + Year;
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date := date DIV 16;
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Month := date MOD 16;
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date := date DIV 16;
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Month := (date MOD 16) * 10 + Month;
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date := date DIV 16;
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Day := date MOD 16;
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date := date DIV 16;
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Day := (date MOD 16) * 10 + Day;
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date := date DIV 16;
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Hour := time MOD 16;
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time := time DIV 16;
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Hour := (time MOD 16) * 10 + Hour;
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time := time DIV 16;
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Min := time MOD 16;
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time := time DIV 16;
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Min := (time MOD 16) * 10 + Min;
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time := time DIV 16;
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Sec := time MOD 16;
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time := time DIV 16;
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Sec := (time MOD 16) * 10 + Sec;
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time := time DIV 16;
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Year := Year + 2000
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END Now;
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END DateTime. |