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DST: fix date_change() thoroughly

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Explicit setting of Daylight Saving Time should be avoided before as well as
after the mktime() call.

Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk>
Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
This commit is contained in:
Lars Henriksen 2019-08-01 07:19:14 +02:00 committed by Lukas Fleischer
parent 5fbc499886
commit a0305d754f
1 changed files with 2 additions and 1 deletions
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3
src/utils.c
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@ -525,10 +525,11 @@ int date_change(struct tm *date, int delta_month, int delta_day)
t = *date;
t.tm_mon += delta_month;
t.tm_mday += delta_day;
t.tm_isdst = -1;
if (mktime(&t) == -1) {
return 1;
} else {
t.tm_isdst = -1;
*date = t;
return 0;
}