nexmon – Blame information for rev 1

Subversion Repositories:
Rev:
Rev Author Line No. Line
1 office 1 /*
2 * Copyright (c) 1997
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21  
22 #define NETDISSECT_REWORKED
23 #ifdef HAVE_CONFIG_H
24 #include "config.h"
25 #endif
26  
27 #include <tcpdump-stdinc.h>
28  
29 #include <stdio.h>
30  
31 #ifdef HAVE_OS_PROTO_H
32 #include "os-proto.h"
33 #endif
34  
35 #include "gmt2local.h"
36  
37 /*
38 * Returns the difference between gmt and local time in seconds.
39 * Use gmtime() and localtime() to keep things simple.
40 */
41 int32_t
42 gmt2local(time_t t)
43 {
44 register int dt, dir;
45 register struct tm *gmt, *loc;
46 struct tm sgmt;
47  
48 if (t == 0)
49 t = time(NULL);
50 gmt = &sgmt;
51 *gmt = *gmtime(&t);
52 loc = localtime(&t);
53 dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 +
54 (loc->tm_min - gmt->tm_min) * 60;
55  
56 /*
57 * If the year or julian day is different, we span 00:00 GMT
58 * and must add or subtract a day. Check the year first to
59 * avoid problems when the julian day wraps.
60 */
61 dir = loc->tm_year - gmt->tm_year;
62 if (dir == 0)
63 dir = loc->tm_yday - gmt->tm_yday;
64 dt += dir * 24 * 60 * 60;
65  
66 return (dt);
67 }