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bugfix in recur_item_inday(): leap years should now be properly handled

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This commit is contained in:
Frederic Culot 2007-12-10 19:03:23 +00:00
parent 2c4f7c9e27
commit 4139434f40
1 changed files with 50 additions and 51 deletions
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101
src/recur.c
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@ -1,4 +1,4 @@
/* $calcurse: recur.c,v 1.30 2007/10/21 13:42:34 culot Exp $ */
/* $calcurse: recur.c,v 1.31 2007/12/10 19:03:23 culot Exp $ */
/*
* Calcurse - text-based organizer
@ -376,12 +376,9 @@ unsigned
recur_item_inday(long item_start, struct days_s *item_exc,
int rpt_type, int rpt_freq, long rpt_until, long day_start)
{
#define YEARSTODAYS(x) ((x) * 365L + (x) / 4 - (x) / 100 + (x) / 400)
date_t start_date;
long day_end;
struct tm *lt;
int day_month, day_year, day_yday, day_mday, diff;
long day_end, diff;
struct tm lt_item, lt_day;
struct days_s *exc;
time_t t;
char *error =
@ -389,12 +386,8 @@ recur_item_inday(long item_start, struct days_s *item_exc,
day_end = day_start + DAYINSEC;
t = day_start;
lt = localtime(&t);
day_month = lt->tm_mon;
day_year = lt->tm_year;
day_yday = lt->tm_yday;
day_mday = lt->tm_mday;
lt_day = *localtime(&t);
for (exc = item_exc; exc != 0; exc = exc->next)
if (exc->st < day_end && exc->st >= day_start)
return 0;
@ -402,53 +395,59 @@ recur_item_inday(long item_start, struct days_s *item_exc,
if (rpt_until == 0) /* we have an endless recurrent item */
rpt_until = day_end;
if (item_start > day_end || rpt_until < day_start)
if (item_start > day_end || rpt_until < day_start)
return 0;
t = item_start;
lt = localtime(&t);
lt_item = *localtime(&t);
/* For proper calculation, both items must start at same time. */
day_start += (lt_item.tm_hour * HOURINSEC + lt_item.tm_min * MININSEC +
lt_item.tm_sec);
switch (rpt_type) {
case RECUR_DAILY:
diff = (YEARSTODAYS(lt->tm_year) + lt->tm_yday) -
(YEARSTODAYS(day_year) + day_yday);
case RECUR_DAILY:
diff = (long)difftime((time_t)day_start, (time_t)item_start);
if (diff % (rpt_freq * DAYINSEC) != 0)
return 0;
lt_item.tm_mday = lt_day.tm_mday;
lt_item.tm_mon = lt_day.tm_mon;
lt_item.tm_year = lt_day.tm_year;
break;
case RECUR_WEEKLY:
if (lt_item.tm_wday != lt_day.tm_wday)
return 0;
else {
diff = ((lt_day.tm_yday - lt_item.tm_yday) / WEEKINDAYS);
if (diff % rpt_freq != 0)
return 0;
lt->tm_mday = day_mday;
lt->tm_mon = day_month;
lt->tm_year = day_year;
break;
case RECUR_WEEKLY:
diff = (YEARSTODAYS(lt->tm_year) + lt->tm_yday) -
(YEARSTODAYS(day_year) + day_yday);
if (diff % (rpt_freq*7) != 0)
return 0;
lt->tm_mday = day_mday;
lt->tm_mon = day_month;
lt->tm_year = day_year;
break;
case RECUR_MONTHLY:
diff = ((day_year - lt->tm_year) * 12) +
(day_month - lt->tm_mon);
if (diff % rpt_freq != 0)
return 0;
lt->tm_mon = day_month;
lt->tm_year = day_year;
break;
case RECUR_YEARLY:
diff = day_year - lt->tm_year;
if (diff % rpt_freq != 0)
return 0;
lt->tm_year = day_year;
break;
default:
fputs(error, stderr);
exit(EXIT_FAILURE);
}
lt_item.tm_mday = lt_day.tm_mday;
lt_item.tm_mon = lt_day.tm_mon;
lt_item.tm_year = lt_day.tm_year;
break;
case RECUR_MONTHLY:
diff = ((lt_day.tm_year - lt_item.tm_year) * 12) +
(lt_day.tm_mon - lt_item.tm_mon);
if (diff % rpt_freq != 0)
return 0;
lt_item.tm_mon = lt_day.tm_mon;
lt_item.tm_year = lt_day.tm_year;
break;
case RECUR_YEARLY:
diff = lt_day.tm_year - lt_item.tm_year;
if (diff % rpt_freq != 0)
return 0;
lt_item.tm_year = lt_day.tm_year;
break;
default:
fputs(error, stderr);
exit(EXIT_FAILURE);
}
start_date.dd = lt->tm_mday;
start_date.mm = lt->tm_mon + 1;
start_date.yyyy = lt->tm_year + 1900;
item_start = date2sec(start_date, lt->tm_hour, lt->tm_min);
start_date.dd = lt_item.tm_mday;
start_date.mm = lt_item.tm_mon + 1;
start_date.yyyy = lt_item.tm_year + 1900;
item_start = date2sec(start_date, lt_item.tm_hour, lt_item.tm_min);
if (item_start < day_end && item_start >= day_start)
return item_start;