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List:       uclibc-cvs
Subject:    [git commit] libc: fix daylight saving time handling
From:       carmelo.amoroso () st ! com (Carmelo Amoroso)
Date:       2011-10-12 11:23:13
Message-ID: 20111012112339.5018B8E309 () busybox ! osuosl ! org
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commit: http://git.uclibc.org/uClibc/commit/?id=47f3da1cf49377c25772bb54d07db55225bbb142
branch: http://git.uclibc.org/uClibc/commit/?id=refs/heads/master

The algorithm computing daylight saving time incorrectly adds a day for
each month after January for leap years. The clock shift from/to DST can
be delayed if the last Sunday of a transition month is exactly seven
days before the first of the following month.

This change adds a day for the February month only.

Signed-off-by: Guillaume Bourcier <guillaumebourcier at free.fr>
Signed-off-by: Richard Braun <rbraun at sceen.net>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso at st.com>
---
 libc/misc/time/time.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libc/misc/time/time.c b/libc/misc/time/time.c
index 19d68e1..8e2ebf1 100644
--- a/libc/misc/time/time.c
+++ b/libc/misc/time/time.c
@@ -689,7 +689,7 @@ static int tm_isdst(register const struct tm *__restrict ptm,
 					++day;
 				}
 				monlen = 31 + day_cor[r->month -1] - day_cor[r->month];
-				if (isleap && (r->month > 1)) {
+				if (isleap && (r->month == 2)) {
 					++monlen;
 				}
 				/* Wweekday (0 is Sunday) of 1st of the month

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