xref: /titanic_44/usr/src/stand/lib/sa/time.h (revision 56b2bdd1f04d465cfe4a95b88ae5cba5884154e4)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #ifndef _SA_TIME_H
28 #define	_SA_TIME_H
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 /*
33  * Exported interfaces for standalone's subset of libc's <time.h>.
34  * All standalone code *must* use this header rather than libc's.
35  */
36 
37 #include <sys/types.h>
38 
39 #ifdef __cplusplus
40 extern "C" {
41 #endif
42 
43 struct	tm {
44 	int	tm_sec;		/* seconds after the minute */
45 	int	tm_min;		/* minutes after the hour */
46 	int	tm_hour;	/* hour since midnight */
47 	int	tm_mday;	/* day of the month */
48 	int	tm_mon;		/* months since January */
49 	int	tm_year;	/* years since 1900 */
50 	int	tm_wday;	/* days since Sunday */
51 	int	tm_yday;	/* Days since January 1 */
52 	int	tm_isdst;	/* flag for alternate daylight savings time */
53 };
54 
55 extern time_t time(time_t *);
56 extern char *ctime(const time_t *t);
57 extern struct tm *gmtime(const time_t *);
58 extern struct tm *localtime(const time_t *);
59 
60 /*
61  * The following silly #defines are actually ripped off from <tzfile.h>.
62  * Since <tzfile.h> is not a documented header, it seemed better to just
63  * inline them here rather than having a full-blown <tzfile.h> of our own.
64  */
65 #define	EPOCH_YEAR		1970
66 #define	EPOCH_WDAY		4
67 #define	SECS_PER_MIN		60
68 #define	DAYS_PER_WEEK		7
69 #define	DAYS_PER_NYEAR		365
70 #define	DAYS_PER_LYEAR		366
71 #define	MONS_PER_YEAR		12
72 #define	SECS_PER_HOUR		(SECS_PER_MIN * 60)
73 #define	SECS_PER_DAY		(SECS_PER_HOUR * 24)
74 #define	TM_YEAR_BASE		1900
75 
76 #define	isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
77 
78 #ifdef __cplusplus
79 }
80 #endif
81 
82 #endif /* _SA_TIME_H */
83