/* * Copyright (c) 1997 *	The Regents of the University of California.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code distributions * retain the above copyright notice and this paragraph in its entirety, (2) * distributions including binary code include the above copyright notice and * this paragraph in its entirety in the documentation or other materials * provided with the distribution, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of * the University nor the names of its contributors may be used to endorse * or promote products derived from this software without specific prior * written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */#ifndef lintstatic const char rcsid[] =    "@(#) $Header: gmt2local.c,v 1.2 97/01/23 22:31:25 leres Exp $ (LBL)";#endif#include <sys/types.h>#ifndef WIN32
#include <sys/time.h>
#else
#include <sys/timeb.h>
#include <time.h>
#endif
#include <stdio.h>#ifdef TIME_WITH_SYS_TIME#include <time.h>#endif#include "gnuc.h"#ifdef HAVE_OS_PROTO_H#include "os-proto.h"#endif#include "gmt2local.h"/* * Returns the difference between gmt and local time in seconds. * Use gmtime() and localtime() to keep things simple. */int32_tgmt2local(time_t t){	register int dt, dir;	register struct tm *gmt, *loc;	struct tm sgmt;	if (t == 0)		t = time(NULL);	gmt = &sgmt;	*gmt = *gmtime(&t);	loc = localtime(&t);	dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 +	    (loc->tm_min - gmt->tm_min) * 60;	/*	 * If the year or julian day is different, we span 00:00 GMT	 * and must add or subtract a day. Check the year first to	 * avoid problems when the julian day wraps.	 */	dir = loc->tm_year - gmt->tm_year;	if (dir == 0)		dir = loc->tm_yday - gmt->tm_yday;	dt += dir * 24 * 60 * 60;	return (dt);}