diff options
Diffstat (limited to 'time/tzset.c')
| -rw-r--r-- | time/tzset.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/time/tzset.c b/time/tzset.c index 0621cd9af7..6b9f93239b 100644 --- a/time/tzset.c +++ b/time/tzset.c @@ -517,20 +517,16 @@ tz_compute (timer, tm) time_t timer; const struct tm *tm; { - if (! compute_change (&tz_rules[0], 1900 + tm->tm_year)) + if (! compute_change (&tz_rules[0], 1900 + tm->tm_year) + || ! compute_change (&tz_rules[1], 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; - } + For the later the daylight saving time ends in the next year. + It is easier to detect this after first computing the time for the + wrong year since now we simply can compare the times to switch. */ + if (tz_rules[0].change < tz_rules[1].change + && ! 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; |