diff options
Diffstat (limited to 'source4/lib/replace.c')
| -rw-r--r-- | source4/lib/replace.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/source4/lib/replace.c b/source4/lib/replace.c index f3a0df6ef6..4ed99c833c 100644 --- a/source4/lib/replace.c +++ b/source4/lib/replace.c @@ -427,6 +427,39 @@ char *rep_inet_ntoa(struct in_addr ip) #endif /* HAVE_SYSLOG */ #endif /* HAVE_VSYSLOG */ +/******************************************************************* +yield the difference between *A and *B, in seconds, ignoring leap seconds +********************************************************************/ +static int tm_diff(struct tm *a, struct tm *b) +{ + int ay = a->tm_year + (1900 - 1); + int by = b->tm_year + (1900 - 1); + int intervening_leap_days = + (ay/4 - by/4) - (ay/100 - by/100) + (ay/400 - by/400); + int years = ay - by; + int days = 365*years + intervening_leap_days + (a->tm_yday - b->tm_yday); + int hours = 24*days + (a->tm_hour - b->tm_hour); + int minutes = 60*hours + (a->tm_min - b->tm_min); + int seconds = 60*minutes + (a->tm_sec - b->tm_sec); + + return seconds; +} + +/******************************************************************* + return the UTC offset in seconds west of UTC, or 0 if it cannot be determined + ******************************************************************/ +int get_time_zone(time_t t) +{ + struct tm *tm = gmtime(&t); + struct tm tm_utc; + if (!tm) + return 0; + tm_utc = *tm; + tm = localtime(&t); + if (!tm) + return 0; + return tm_diff(&tm_utc,tm); +} #ifndef HAVE_TIMEGM /* |