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#ifndef TIMESTAMP_H
#define TIMESTAMP_H
/* $OpenBSD: timestamp.h,v 1.6 2010/07/19 19:46:44 espie Exp $ */
/*
* Copyright (c) 2001 Marc Espie.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT 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 OPENBSD
* PROJECT 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.
*/
/* This module handles time stamps on files in a relatively high-level way.
* Most of the interface is achieved through inlineable code.
*
* TIMESTAMP: opaque data type to store a date.
* ts_set_out_of_date(t): set up t so that it is out-of-date.
* b = is_out_of_date(t): check whether t is out-of-date.
* ts_set_from_stat(s, t): grab date out of stat(2) buffer.
* b = is_strictly_before(t1, t2):
* check whether t1 is before t2.
* stamp = timestamp2time_t(t): extract time_t from timestamp.
* ts_set_from_time_t(d, t): create timestamp from time_t.
* ts_set_from_now(n): grab current date.
*/
/* sysresult = set_times(name): set modification times on a file.
* system call results.
*/
#define Init_Timestamp() ts_set_from_now(now)
#ifndef TIMESTAMP_TYPE
#include "timestamp_t.h"
#endif
#ifdef USE_TIMESPEC
#define ts_set_out_of_date(t) (t).tv_sec = INT_MIN, (t).tv_nsec = 0
#define is_out_of_date(t) ((t).tv_sec == INT_MIN && (t).tv_nsec == 0)
#define ts_set_from_stat(s, t) \
do { \
(t).tv_sec = (s).st_mtime; \
(t).tv_nsec = (s).st_mtimensec; \
if (is_out_of_date(t)) \
(t).tv_nsec++; \
} while (0)
#define is_strictly_before(t1, t2) timespeccmp(&(t1), &(t2), <)
#define ts_set_from_time_t(d, t) \
do { \
(t).tv_sec = d; \
(t).tv_nsec = 0; \
if (is_out_of_date(t)) \
(t).tv_nsec++; \
} while (0)
#define ts_set_from_now(n) \
do { \
struct timeval tv; \
gettimeofday(&tv, NULL); \
TIMEVAL_TO_TIMESPEC(&(tv), &n); \
} while (0)
#define timestamp2time_t(t) ((t).tv_sec)
#else
#define is_out_of_date(t) ((t) == INT_MIN)
#define ts_set_out_of_date(t) (t) = INT_MIN
#define ts_set_from_stat(s, t) \
do { \
(t) = (s).st_mtime; \
if (is_out_of_date(t)) \
(t)++; \
} while (0)
#define is_strictly_before(t1, t2) ((t1) < (t2))
#define ts_set_from_time_t(d, t) \
do { \
(t) = d; \
if (is_out_of_date(t)) \
(t)++; \
} while (0)
#define ts_set_from_now(n) time(&(n))
#define timestamp2time_t(t) (t)
#endif
extern int set_times(const char *);
extern TIMESTAMP now; /* The time at the start of this whole
* process */
extern char *time_to_string(TIMESTAMP t);
#endif
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