diff options
author | Thomas Bushnell <thomas@gnu.org> | 1997-02-25 21:28:37 +0000 |
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committer | Thomas Bushnell <thomas@gnu.org> | 1997-02-25 21:28:37 +0000 |
commit | f07a4c844da9f0ecae5bbee1ab94be56505f26f7 (patch) | |
tree | 12b07c7e578fc1a5f53dbfde2632408491ff2a70 /i386/dos/dos_gettimeofday.c |
Initial source
Diffstat (limited to 'i386/dos/dos_gettimeofday.c')
-rw-r--r-- | i386/dos/dos_gettimeofday.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/i386/dos/dos_gettimeofday.c b/i386/dos/dos_gettimeofday.c new file mode 100644 index 0000000..3b61bab --- /dev/null +++ b/i386/dos/dos_gettimeofday.c @@ -0,0 +1,77 @@ +/* + * 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; +} + |