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[Samba.git] / lib / util / time_basic.c
blob095236bf78ad6f4e5abde1439d2e526881c13032
1 /*
2 * Unix SMB/CIFS implementation.
3 * time handling functions
5 * Copyright (C) Andrew Tridgell 1992-2004
6 * Copyright (C) Stefan (metze) Metzmacher 2002
7 * Copyright (C) Jeremy Allison 2007
8 * Copyright (C) Andrew Bartlett 2011
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include "replace.h"
25 #include "system/time.h"
26 #include "lib/util/time_basic.h"
28 /**
29 a gettimeofday wrapper
30 **/
31 _PUBLIC_ void GetTimeOfDay(struct timeval *tval)
33 #if defined(HAVE_GETTIMEOFDAY_TZ) || defined(HAVE_GETTIMEOFDAY_TZ_VOID)
34 gettimeofday(tval,NULL);
35 #else
36 gettimeofday(tval);
37 #endif
40 /****************************************************************************
41 Return the date and time as a string
42 ****************************************************************************/
44 char *timeval_str_buf(const struct timeval *tp, bool rfc5424, bool hires,
45 struct timeval_buf *dst)
47 time_t t;
48 struct tm *tm;
49 size_t len;
51 t = (time_t)tp->tv_sec;
52 tm = localtime(&t);
54 if (tm == NULL) {
55 if (hires) {
56 snprintf(dst->buf, sizeof(dst->buf),
57 "%ld.%06ld seconds since the Epoch",
58 (long)tp->tv_sec, (long)tp->tv_usec);
59 } else {
60 snprintf(dst->buf, sizeof(dst->buf),
61 "%ld seconds since the Epoch", (long)t);
63 return dst->buf;
66 len = snprintf(dst->buf, sizeof(dst->buf),
67 (rfc5424 ?
68 "%04d-%02d-%02dT%02d:%02d:%02d" :
69 "%04d/%02d/%02d %02d:%02d:%02d"),
70 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
71 tm->tm_hour, tm->tm_min, tm->tm_sec);
73 if ((rfc5424 || hires) && (len < sizeof(dst->buf))) {
74 len += snprintf(dst->buf + len, sizeof(dst->buf) - len,
75 ".%06ld", (long)tp->tv_usec);
78 if (rfc5424 && (len < sizeof(dst->buf))) {
79 struct tm tm_utc, tm_local;
80 int offset;
82 tm_local = *tm;
83 /* It is reasonable to assume that if localtime()
84 * worked above, then gmtime() should also work
85 * without error. */
86 tm_utc = *gmtime(&t);
88 offset = (tm_local.tm_hour - tm_utc.tm_hour) * 60 +
89 (tm_local.tm_min - tm_utc.tm_min);
91 snprintf(dst->buf + len, sizeof(dst->buf) - len,
92 "%c%02d:%02d",
93 (offset >=0 ? '+' : '-'),
94 abs(offset) / 60,
95 abs(offset) % 60);
98 return dst->buf;