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* Added PeriodBetween by Bart

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git-svn-id: trunk@26100 -
This commit is contained in:
michael 2013-11-16 17:18:09 +00:00
parent 3eeb422abe
commit a13f479b50
1 changed files with 32 additions and 0 deletions
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32
rtl/objpas/dateutil.inc
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@ -261,6 +261,7 @@ Function HoursBetween(const ANow, AThen: TDateTime): Int64;
Function MinutesBetween(const ANow, AThen: TDateTime): Int64; Function MinutesBetween(const ANow, AThen: TDateTime): Int64;
Function SecondsBetween(const ANow, AThen: TDateTime): Int64; Function SecondsBetween(const ANow, AThen: TDateTime): Int64;
Function MilliSecondsBetween(const ANow, AThen: TDateTime): Int64; Function MilliSecondsBetween(const ANow, AThen: TDateTime): Int64;
Procedure PeriodBetween(const ANow, AThen: TDateTime; Out Years, months, days : Word);
{ --------------------------------------------------------------------- { ---------------------------------------------------------------------
Timespan in xxx functions. Timespan in xxx functions.
@ -1325,6 +1326,37 @@ begin
Result:=Trunc((Abs(DateTimeDiff(ANow,AThen))+TDateTimeEpsilon)*MSecsPerDay); Result:=Trunc((Abs(DateTimeDiff(ANow,AThen))+TDateTimeEpsilon)*MSecsPerDay);
end; end;
Procedure PeriodBetween(Const ANow, AThen: TDateTime; Out Years, months, days : Word);
var
Y1, Y2, M1, M2, D1, D2: word;
begin
if (AThen>ANow) then
begin
DecodeDate(ANow,Y1,M1,D1);
DecodeDate(AThen,Y2,M2,D2);
end
else
begin
DecodeDate(AThen,Y1,M1,D1);
DecodeDate(ANow,Y2,M2,D2);
end;
Years:=Y2-Y1;
if (M1>M2) or ((M1=M2) and (D1>D2)) then Dec(Years);
if (M1>M2) then Inc(M2,12); //already adjusted Years in that case
Months:=M2-M1;
if (D2>=D1) then
Days:=D2-D1
else
begin
if (Months=0) then
Months:=11
else
Dec(Months);
Days:=(DaysInAMonth(Y1,M1)-D1)+D2;
end;
end;
{ --------------------------------------------------------------------- { ---------------------------------------------------------------------
Timespan in xxx functions. Timespan in xxx functions.