115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
/*
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* Copyright (c) 2013, 2021 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* timespec.h
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* Utility functions for manipulation of struct timespec.
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*/
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#ifndef INCLUDE_TIMESPEC_H
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#define INCLUDE_TIMESPEC_H
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#include <sys/cdefs.h>
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#include <sys/__/types.h>
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#if !defined(__cplusplus)
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#include <stdbool.h>
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#endif
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#ifndef __time_t_defined
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#define __time_t_defined
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typedef __time_t time_t;
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#endif
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#include <sortix/timespec.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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static __inline bool timespec_is_canonical(struct timespec t)
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{
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return 0 <= t.tv_nsec && t.tv_nsec <= 999999999;
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}
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static __inline bool timespec_eq(struct timespec a, struct timespec b)
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{
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return a.tv_sec == b.tv_sec && a.tv_nsec == b.tv_nsec;
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}
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static __inline bool timespec_neq(struct timespec a, struct timespec b)
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{
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return a.tv_sec != b.tv_sec || a.tv_nsec != b.tv_nsec;
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}
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static __inline bool timespec_lt(struct timespec a, struct timespec b)
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{
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return a.tv_sec < b.tv_sec ||
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(a.tv_sec == b.tv_sec && a.tv_nsec < b.tv_nsec);
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}
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static __inline bool timespec_le(struct timespec a, struct timespec b)
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{
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return a.tv_sec < b.tv_sec ||
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(a.tv_sec == b.tv_sec && a.tv_nsec <= b.tv_nsec);
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}
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static __inline bool timespec_gt(struct timespec a, struct timespec b)
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{
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return a.tv_sec > b.tv_sec ||
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(a.tv_sec == b.tv_sec && a.tv_nsec > b.tv_nsec);
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}
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static __inline bool timespec_ge(struct timespec a, struct timespec b)
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{
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return a.tv_sec > b.tv_sec ||
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(a.tv_sec == b.tv_sec && a.tv_nsec >= b.tv_nsec);
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}
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static __inline struct timespec timespec_make(time_t sec, long nsec)
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{
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struct timespec ret;
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ret.tv_sec = sec;
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ret.tv_nsec = nsec;
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return ret;
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}
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static __inline struct timespec timespec_neg(struct timespec t)
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{
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if ( t.tv_sec == __TIME_MIN )
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return timespec_make(__TIME_MAX,
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!t.tv_nsec ? 999999999 : 1000000000 - t.tv_nsec);
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if ( t.tv_nsec )
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return timespec_make(-t.tv_sec - 1, 1000000000 - t.tv_nsec);
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return timespec_make(-t.tv_sec, 0);
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}
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static __inline struct timespec timespec_nul(void)
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{
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return timespec_make(0, 0);
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}
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struct timespec timespec_canonalize(struct timespec);
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struct timespec timespec_add(struct timespec, struct timespec);
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struct timespec timespec_sub(struct timespec, struct timespec);
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bool timespec_add_overflow(struct timespec, struct timespec, struct timespec*);
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bool timespec_sub_overflow(struct timespec, struct timespec, struct timespec*);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif
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