adtools/clib2

/*
 * $Id: time_gettimeofday.c,v 1.12 2006-12-28 14:30:57 obarthel Exp $
 *
 * :ts=4
 *
 * Portable ISO 'C' (1994) runtime library for the Amiga computer
 * Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Neither the name of Olaf Barthel nor the names of contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * 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 OWNER 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.
 */

#ifndef PROTO_TIMER_H
#include <proto/timer.h>
#endif /* PROTO_TIMER_H */

/****************************************************************************/

#include <sys/time.h>

/****************************************************************************/

#ifndef _TIME_HEADERS_H
#include "time_headers.h"
#endif /* _TIME_HEADERS_H */

#ifndef _LOCALE_HEADERS_H
#include "locale_headers.h"
#endif /* _LOCALE_HEADERS_H */

#ifndef _UNISTD_HEADERS_H
#include "unistd_headers.h"
#endif /* _UNISTD_HEADERS_H */

/****************************************************************************/

/* The following is not part of the ISO 'C' (1994) standard. */

/****************************************************************************/

int
gettimeofday(struct timeval *tp, struct timezone *tzp)
{
    #if defined(__amigaos4__)
    struct TimerIFace * ITimer = __ITimer;
    #else
    struct Library * TimerBase = __TimerBase;
    #endif /* __amigaos4__ */

    ULONG seconds,microseconds;

    ENTER();

    /* Obtain the current system time. */
    PROFILE_OFF();

    #if defined(__NEW_TIMEVAL_DEFINITION_USED__)
    {
        struct TimeVal tv;

        GetSysTime(&tv);

        seconds        = tv.Seconds;
        microseconds    = tv.Microseconds;
    }
    #else
    {
        struct timeval tv;

        GetSysTime(&tv);

        seconds        = tv.tv_sec;
        microseconds    = tv.tv_usec;
    }
    #endif /* __NEW_TIMEVAL_DEFINITION_USED__ */

    PROFILE_ON();

    /* Convert the number of seconds so that they match the Unix epoch, which
       starts (January 1st, 1970) eight years before the AmigaOS epoch. */
    seconds += UNIX_TIME_OFFSET;

    __locale_lock();

    /* If possible, adjust for the local time zone. We do this because the
       AmigaOS system time is returned in local time and we want to return
       it in UTC. */
    if(__default_locale != NULL)
        seconds += 60 * __default_locale->loc_GMTOffset;

    if(tp != NULL)
    {
        tp->tv_sec    = (long)seconds;
        tp->tv_usec    = (long)microseconds;

        SHOWVALUE(tp->tv_sec);
        SHOWVALUE(tp->tv_usec);
    }

    if(tzp != NULL)
    {
        if(__default_locale != NULL)
            tzp->tz_minuteswest = __default_locale->loc_GMTOffset;
        else
            tzp->tz_minuteswest = 0;

        /* The -1 means "we do not know if the time given is in
           daylight savings time". */
        tzp->tz_dsttime = -1;

        SHOWVALUE(tzp->tz_minuteswest);
        SHOWVALUE(tzp->tz_dsttime);
    }

    __locale_unlock();

    RETURN(0);
    return(0);
}