diff options
Diffstat (limited to 'time/tzset.c')
| -rw-r--r-- | time/tzset.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/time/tzset.c b/time/tzset.c index c35017c960..0621cd9af7 100644 --- a/time/tzset.c +++ b/time/tzset.c @@ -517,9 +517,20 @@ tz_compute (timer, tm) time_t timer; const struct tm *tm; { - if (! compute_change (&tz_rules[0], 1900 + tm->tm_year) || - ! compute_change (&tz_rules[1], 1900 + tm->tm_year)) + if (! compute_change (&tz_rules[0], 1900 + tm->tm_year)) return 0; + /* We have to distinguish between northern and southern hemisphere. + For the later the daylight saving time ends in the next year. */ + if (tz_rules[0].change < tz_rules[1].change) + { + if (! compute_change (&tz_rules[1], 1900 + tm->tm_year)) + return 0; + } + else + { + if (! compute_change (&tz_rules[1], 1900 + tm->tm_year + 1)) + return 0; + } __daylight = tz_rules[0].offset != tz_rules[1].offset; __timezone = -tz_rules[0].offset; |