/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 * All rights reserved.
 *
 * 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
 */

#pragma once

#include <sys/cdefs.h>
#include <sys/types.h>

__BEGIN_DECLS

#define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
#define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
#define timercmp(tvp, uvp, cmp) \
    (((tvp)->tv_sec == (uvp)->tv_sec) ? ((tvp)->tv_usec cmp(uvp)->tv_usec) : ((tvp)->tv_sec cmp(uvp)->tv_sec))
#define timeradd(a, b, out)                           \
    do {                                              \
        (out)->tv_sec = (a)->tv_sec + (b)->tv_sec;    \
        (out)->tv_usec = (a)->tv_usec + (b)->tv_usec; \
        if ((out)->tv_usec >= 1000000) {              \
            (out)->tv_sec++;                          \
            (out)->tv_usec -= 1000000;                \
        }                                             \
    } while (0)
#define timersub(a, b, out)                           \
    do {                                              \
        (out)->tv_sec = (a)->tv_sec - (b)->tv_sec;    \
        (out)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
        if ((out)->tv_usec < 0) {                     \
            (out)->tv_sec--;                          \
            (out)->tv_usec += 1000000;                \
        }                                             \
    } while (0)

struct timeval {
    time_t tv_sec;
    suseconds_t tv_usec;
};

struct timezone {
    int tz_minuteswest;
    int tz_dsttime;
};

int gettimeofday(struct timeval* __restrict__, void* __restrict__) __attribute__((nonnull(1)));

__END_DECLS