Source code pulled from OpenBSD for OpenNTPD. The place to contribute to this code is via the OpenBSD CVS tree.
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/* $OpenBSD: time.h,v 1.28 2015/04/07 01:47:04 millert Exp $ */
/* $NetBSD: time.h,v 1.9 1994/10/26 00:56:35 cgd Exp $ */
/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)time.h 5.12 (Berkeley) 3/9/91
*/
#ifndef _TIME_H_
#define _TIME_H_
#include <sys/cdefs.h>
#include <sys/_types.h>
#ifndef NULL
#ifdef __GNUG__
#define NULL __null
#elif defined(__cplusplus)
#define NULL 0L
#else
#define NULL ((void *)0)
#endif
#endif
#ifndef _CLOCK_T_DEFINED_
#define _CLOCK_T_DEFINED_
typedef __clock_t clock_t;
#endif
#ifndef _TIME_T_DEFINED_
#define _TIME_T_DEFINED_
typedef __time_t time_t;
#endif
#ifndef _SIZE_T_DEFINED_
#define _SIZE_T_DEFINED_
typedef __size_t size_t;
#endif
#if __POSIX_VISIBLE > 0 && __POSIX_VISIBLE < 200112 || __BSD_VISIBLE
/*
* Frequency of the clock ticks reported by times(). Deprecated - use
* sysconf(_SC_CLK_TCK) instead. (Removed in 1003.1-2001.)
*/
#define CLK_TCK 100
#endif
#define CLOCKS_PER_SEC 100 /* frequency of ticks reported by clock(). */
#if __POSIX_VISIBLE >= 199309
#ifndef _TIMESPEC_DECLARED
#define _TIMESPEC_DECLARED
struct timespec {
time_t tv_sec; /* seconds */
long tv_nsec; /* and nanoseconds */
};
#endif
#include <sys/_time.h>
#ifndef _CLOCKID_T_DEFINED_
#define _CLOCKID_T_DEFINED_
typedef __clockid_t clockid_t;
#endif
#ifndef _TIMER_T_DEFINED_
#define _TIMER_T_DEFINED_
typedef __timer_t timer_t;
#endif
#endif
#if __POSIX_VISIBLE >= 200112
#ifndef _PID_T_DEFINED_
#define _PID_T_DEFINED_
typedef __pid_t pid_t;
#endif
#endif
struct tm {
int tm_sec; /* seconds after the minute [0-60] */
int tm_min; /* minutes after the hour [0-59] */
int tm_hour; /* hours since midnight [0-23] */
int tm_mday; /* day of the month [1-31] */
int tm_mon; /* months since January [0-11] */
int tm_year; /* years since 1900 */
int tm_wday; /* days since Sunday [0-6] */
int tm_yday; /* days since January 1 [0-365] */
int tm_isdst; /* Daylight Saving Time flag */
long tm_gmtoff; /* offset from UTC in seconds */
char *tm_zone; /* timezone abbreviation */
};
__BEGIN_DECLS
char *asctime(const struct tm *);
clock_t clock(void);
char *ctime(const time_t *);
double difftime(time_t, time_t);
struct tm *gmtime(const time_t *);
struct tm *localtime(const time_t *);
time_t mktime(struct tm *);
size_t strftime(char *__restrict, size_t, const char *__restrict,
const struct tm *__restrict)
__attribute__ ((__bounded__(__string__,1,2)));
time_t time(time_t *);
#if __XPG_VISIBLE >= 300
extern int daylight;
extern long timezone;
#endif
#if __XPG_VISIBLE >= 400
char *strptime(const char *__restrict, const char *__restrict,
struct tm *__restrict);
#endif
#if __POSIX_VISIBLE >= 199506
char *asctime_r(const struct tm *__restrict, char *__restrict)
__attribute__ ((__bounded__(__minbytes__,2,26)));
char *ctime_r(const time_t *, char *)
__attribute__ ((__bounded__(__minbytes__,2,26)));
struct tm *gmtime_r(const time_t *__restrict, struct tm *__restrict);
struct tm *localtime_r(const time_t *__restrict, struct tm *__restrict);
#endif
#if __POSIX_VISIBLE
extern char *tzname[2];
void tzset(void);
#endif
#if __POSIX_VISIBLE >= 199309
int clock_getres(clockid_t, struct timespec *);
int clock_gettime(clockid_t, struct timespec *);
int clock_settime(clockid_t, const struct timespec *);
int nanosleep(const struct timespec *, struct timespec *);
#endif
#if __POSIX_VISIBLE >= 200112
int clock_getcpuclockid(pid_t, clockid_t *);
#endif
#if __BSD_VISIBLE
void tzsetwall(void);
time_t timelocal(struct tm *);
time_t timegm(struct tm *);
time_t timeoff(struct tm *, const long);
#endif
__END_DECLS
#endif /* !_TIME_H_ */