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(* TimeDate.mod provides a Logitech-3.0 compatible library module.
Copyright (C) 2005-2025 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Modula-2 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.
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/>. *)
IMPLEMENTATION MODULE TimeDate ;
FROM SYSTEM IMPORT ADDRESS, ADR, TSIZE ;
FROM libc IMPORT tm, time, time_t, memcpy, localtime ;
FROM DynamicStrings IMPORT String, Mark, ConCat, InitString, KillString, CopyOut ;
FROM FormatStrings IMPORT Sprintf3 ;
IMPORT Selective ;
(*
TimeToString - convert time, t, to a string.
The string, s, should be at least 19 characters
long and the returned string will be
yyyy-mm-dd hh:mm:ss
*)
PROCEDURE TimeToString (t: Time; VAR s: ARRAY OF CHAR) ;
VAR
q : String ;
y, m, d, h, sec: CARDINAL ;
BEGIN
WITH t DO
y := day DIV 512 + 1900 ;
m := (day DIV 32) MOD 16 ;
d := day MOD 32 ;
q := Sprintf3(Mark(InitString('%04d-%02d-%02d')), y, m, d) ;
h := minute DIV 60 ;
m := minute MOD 60 ;
sec := millisec DIV 1000 ;
q := ConCat(q, Mark(Sprintf3(Mark(InitString(' %02d:%02d:%02d')), h, m, sec))) ;
CopyOut(s, q) ;
q := KillString(q) ;
END
END TimeToString ;
PROCEDURE TimeToZero (VAR t: Time) ;
BEGIN
WITH t DO
day := 0 ;
minute := 0 ;
millisec := 0
END
END TimeToZero ;
PROCEDURE CompareTime (t1, t2: Time) : INTEGER ;
BEGIN
IF t1.day<t2.day
THEN
RETURN -1
ELSIF t1.day>t2.day
THEN
RETURN 1
ELSE
IF t1.minute<t2.minute
THEN
RETURN -1
ELSIF t1.minute>t2.minute
THEN
RETURN 1
ELSE
IF t1.millisec<t2.millisec
THEN
RETURN -1
ELSIF t1.millisec>t2.millisec
THEN
RETURN 1
ELSE
RETURN 0
END
END
END
END CompareTime ;
PROCEDURE SetTime (curTime: Time) ;
BEGIN
(* does nothing *)
END SetTime ;
PROCEDURE GetTime (VAR curTime: Time) ;
VAR
l : time_t ;
r : INTEGER ;
t : tm ;
a : ADDRESS ;
tv : Selective.Timeval ;
s, u: CARDINAL ;
BEGIN
tv := Selective.InitTime(0, 0) ;
r := Selective.GetTimeOfDay(tv) ;
l := time(NIL) ;
IF l#-1
THEN
a := localtime(l) ;
a := memcpy(ADR(t), a, TSIZE(t)) ;
WITH curTime DO
day := t.tm_mday+(t.tm_mon+1)*32+t.tm_year*512 ;
minute := t.tm_min+t.tm_hour*60 ;
Selective.GetTime(tv, s, u) ;
(* s MOD 61, to allow for leap seconds *)
millisec := (u DIV 1000) MOD (60 * 1000) + ((s MOD 61) * 1000)
END
END ;
tv := Selective.KillTime(tv)
END GetTime ;
END TimeDate.
|
