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23 static const char rcsid[] =
24 "@(#) $Header: /tcpdump/master/tcpdump/gmt2local.c,v 1.4 2000/07/11 00:49:02 assar Exp $ (LBL)";
31 #include <sys/types.h>
35 #ifdef TIME_WITH_SYS_TIME
39 #ifdef HAVE_OS_PROTO_H
43 #include "gmt2local.h"
46 * Returns the difference between gmt and local time in seconds.
47 * Use gmtime() and localtime() to keep things simple.
53 register struct tm *gmt, *loc;
61 dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 +
62 (loc->tm_min - gmt->tm_min) * 60;
65 * If the year or julian day is different, we span 00:00 GMT
66 * and must add or subtract a day. Check the year first to
67 * avoid problems when the julian day wraps.
69 dir = loc->tm_year - gmt->tm_year;
71 dir = loc->tm_yday - gmt->tm_yday;
72 dt += dir * 24 * 60 * 60;