Trailing-Edge
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PDP-10 Archives
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decuslib10-05
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43,50337/23/dayno.sim
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OPTIONS(/E/C/-Q/-A/-I/-D);
EXTERNAL TEXT PROCEDURE today;
INTEGER PROCEDURE dayno;
!
Integer procedure DAYNO returns the ordinal day
number in current year.;
BEGIN
INTEGER day,month,year; TEXT t;
t:- today;
month:= t.Sub(6,2).Getint;
day:= 30*(month-1) + (4*month-7)//6;
IF month > 4 THEN day:= day - 1 ELSE
IF month = 2 THEN day:= day + 1;
IF month > 2 THEN
BEGIN year:= t.Getint;
day:= IF Mod(year,400) = 0 THEN day - 1 ELSE
day - Sign(Mod(year,4));
END After February;
dayno:= day + t.Sub(9,2).Getint;
END of dayno;