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Due to the switch form Julian to Gregorian calender,

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even a whole month might be missing.
This caused a bug for the LN -calender, whose switch was
on Dec 12, 9999.
This commit is contained in:
Wolfgang Helbig 1999-03-27 21:08:13 +00:00
parent 8fe2c75e31
commit cf5f6adf44
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=45064
1 changed files with 14 additions and 9 deletions
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23
usr.bin/ncal/ncal.c
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@ -26,7 +26,7 @@
#ifndef lint
static const char rcsid[] =
"$Id: ncal.c,v 1.5 1998/01/07 07:46:33 charnier Exp $";
"$Id: ncal.c,v 1.6 1998/01/15 10:23:34 helbig Exp $";
#endif /* not lint */
#include <calendar.h>
@ -88,7 +88,7 @@ static struct djswitch {
{"IT", "Italy", {1582, 10, 4}, "%e %B %Y"},
{"JP", "Japan", {1918, 12, 18}, "%Y\x94N %B%e"},
{"LI", "Lithuania", {1918, 2, 1}, "%e %B %Y"},
{"LN", "Latin", {9999, 31, 12}, "%e %B %Y"},
{"LN", "Latin", {9999, 05, 31}, "%e %B %Y"},
{"LU", "Luxembourg", {1582, 12, 14}, "%e %B %Y"},
{"LV", "Latvia", {1918, 2, 1}, "%e %B %Y"},
{"NL", "Netherlands", {1582, 12, 14}, "%e %B %Y"},
@ -748,10 +748,9 @@ mkweekdays(struct weekdays *wds)
}
/*
* Compute the day number of the first day in month.
* The day y-m-1 might be dropped due to Gregorian Reformation,
* so the answer is the smallest day number nd with sdate(nd) in
* the month m.
* Compute the day number of the first
* existing date after the first day in month.
* (the first day in month and even the month might not exist!)
*/
int
firstday(int y, int m)
@ -762,9 +761,15 @@ firstday(int y, int m)
dt.y = y;
dt.m = m;
dt.d = 1;
for (nd = sndays(&dt); sdate(nd, &dt)->m != m; nd++)
;
return (nd);
nd = sndays(&dt);
for (;;) {
sdate(nd, &dt);
if ((dt.m >= m && dt.y == y) || dt.y > y)
return (nd);
else
nd++;
}
/* NEVER REACHED */
}
/*