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/*
* Copyright (c) 1995-1994 The University of Utah and
* the Computer Systems Laboratory at the University of Utah (CSL).
* All rights reserved.
*
* Permission to use, copy, modify and distribute this software is hereby
* granted provided that (1) source code retains these copyright, permission,
* and disclaimer notices, and (2) redistributions including binaries
* reproduce the notices in supporting documentation, and (3) all advertising
* materials mentioning features or use of this software display the following
* acknowledgement: ``This product includes software developed by the
* Computer Systems Laboratory at the University of Utah.''
*
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* CSL requests users of this software to return to csl-dist@cs.utah.edu any
* improvements that they make and grant CSL redistribution rights.
*
* Author: Bryan Ford, University of Utah CSL
*/
#include <unistd.h>
#include <errno.h>
#include <sys/time.h>
#include "dos_io.h"
#include "debug.h"
int dos_gettimeofday(struct timeval *tv, struct timezone *tz)
{
static int daysofmonth[12] = {31, 28, 31, 30, 31, 30, 31,
31, 30, 31, 30, 31};
struct real_call_data real_call_data;
int err;
dos_init_rcd(&real_call_data);
if (tv)
{
int year, month, day, hour, min, sec, hund;
real_call_data.eax = 0x2a00;
real_int(0x21, &real_call_data);
year = real_call_data.ecx & 0xffff;
month = (real_call_data.edx >> 8) & 0xff;
day = real_call_data.edx & 0xff;
real_call_data.eax = 0x2c00;
real_int(0x21, &real_call_data);
if (err = dos_check_err(&real_call_data))
return err;
hour = (real_call_data.ecx >> 8) & 0xff;
min = real_call_data.ecx & 0xff;
sec = (real_call_data.edx >> 8) & 0xff;
hund = real_call_data.edx & 0xff;
tv->tv_sec = (year - 1970) * (365 * 24 * 60 * 60);
tv->tv_sec += (year - 1970) / 4 * (24 * 60 * 60); /* XXX??? */
tv->tv_sec += daysofmonth[month-1] * (24 * 60 * 60);
if ((((year - 1970) % 4) == 0) && (month > 2)) /* XXX??? */
tv->tv_sec += 24 * 60 * 60;
tv->tv_sec += day * 24 * 60 * 60;
tv->tv_sec += hour * 60 * 60;
tv->tv_sec += min * 60;
tv->tv_sec += sec;
tv->tv_usec = hund * (1000000 / 100);
}
if (tz)
return EINVAL; /*XXX*/
assert(tz == 0);
return 0;
}
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