Return to dos_gettimeofday.c CVS log

Up to [GnuMach] / Gnu-Mach / i386 / dos

Annotation of Gnu-Mach/i386/dos/dos_gettimeofday.c, revision 1.1.1.1

1.1       root        1: /* 
                      2:  * Copyright (c) 1995-1994 The University of Utah and
                      3:  * the Computer Systems Laboratory at the University of Utah (CSL).
                      4:  * All rights reserved.
                      5:  *
                      6:  * Permission to use, copy, modify and distribute this software is hereby
                      7:  * granted provided that (1) source code retains these copyright, permission,
                      8:  * and disclaimer notices, and (2) redistributions including binaries
                      9:  * reproduce the notices in supporting documentation, and (3) all advertising
                     10:  * materials mentioning features or use of this software display the following
                     11:  * acknowledgement: ``This product includes software developed by the
                     12:  * Computer Systems Laboratory at the University of Utah.''
                     13:  *
                     14:  * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
                     15:  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
                     16:  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     17:  *
                     18:  * CSL requests users of this software to return to [email protected] any
                     19:  * improvements that they make and grant CSL redistribution rights.
                     20:  *
                     21:  *      Author: Bryan Ford, University of Utah CSL
                     22:  */
                     23: 
                     24: #include <unistd.h>
                     25: #include <errno.h>
                     26: #include <sys/time.h>
                     27: 
                     28: #include "dos_io.h"
                     29: #include "debug.h"
                     30: 
                     31: int dos_gettimeofday(struct timeval *tv, struct timezone *tz)
                     32: {
                     33:        static int daysofmonth[12] = {31, 28, 31, 30, 31, 30, 31,
                     34:                                      31, 30, 31, 30, 31};
                     35: 
                     36:        struct real_call_data real_call_data;
                     37:        int err;
                     38: 
                     39:        dos_init_rcd(&real_call_data);
                     40: 
                     41:        if (tv)
                     42:        {
                     43:                int year, month, day, hour, min, sec, hund;
                     44: 
                     45:                real_call_data.eax = 0x2a00;
                     46:                real_int(0x21, &real_call_data);
                     47:                year = real_call_data.ecx & 0xffff;
                     48:                month = (real_call_data.edx >> 8) & 0xff;
                     49:                day = real_call_data.edx & 0xff;
                     50:                real_call_data.eax = 0x2c00;
                     51:                real_int(0x21, &real_call_data);
                     52:                if (err = dos_check_err(&real_call_data))
                     53:                        return err;
                     54: 
                     55:                hour = (real_call_data.ecx >> 8) & 0xff;
                     56:                min = real_call_data.ecx & 0xff;
                     57:                sec = (real_call_data.edx >> 8) & 0xff;
                     58:                hund = real_call_data.edx & 0xff;
                     59: 
                     60:                tv->tv_sec = (year - 1970) * (365 * 24 * 60 * 60);
                     61:                tv->tv_sec += (year - 1970) / 4 * (24 * 60 * 60); /* XXX??? */
                     62:                tv->tv_sec += daysofmonth[month-1] * (24 * 60 * 60);
                     63:                if ((((year - 1970) % 4) == 0) && (month > 2)) /* XXX??? */
                     64:                        tv->tv_sec += 24 * 60 * 60;
                     65:                tv->tv_sec += day * 24 * 60 * 60;
                     66:                tv->tv_sec += hour * 60 * 60;
                     67:                tv->tv_sec += min * 60;
                     68:                tv->tv_sec += sec;
                     69:                tv->tv_usec = hund * (1000000 / 100);
                     70:        }
                     71:        if (tz)
                     72:                return EINVAL; /*XXX*/
                     73: 
                     74:        assert(tz == 0);
                     75:        return 0;
                     76: }
                     77: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.