b857858f48
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@7 6ac86273-5f31-0410-b378-82cca8765d1b
243 lines
7.2 KiB
C
243 lines
7.2 KiB
C
/****************************************************************/
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/* */
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/* systime.c */
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/* */
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/* DOS/C Date/Time Functions */
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/* */
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/* Copyright (c) 1998 */
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/* Pasquale J. Villani */
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/* All Rights Reserved */
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/* */
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/* This file is part of DOS-C. */
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/* */
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/* DOS-C is free software; you can redistribute it and/or */
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/* modify it under the terms of the GNU General Public License */
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/* as published by the Free Software Foundation; either version */
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/* 2, or (at your option) any later version. */
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/* */
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/* DOS-C is distributed in the hope that it will be useful, but */
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/* WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
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/* the GNU General Public License for more details. */
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/* */
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/* You should have received a copy of the GNU General Public */
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/* License along with DOS-C; see the file COPYING. If not, */
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/* write to the Free Software Foundation, 675 Mass Ave, */
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/* Cambridge, MA 02139, USA. */
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/****************************************************************/
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#include "portab.h"
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#include "time.h"
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#include "date.h"
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#include "globals.h"
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#ifdef VERSION_STRINGS
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static BYTE *RcsId = "$Id$";
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#endif
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/*
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* $Log$
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* Revision 1.2 2000/05/08 04:30:00 jimtabor
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* Update CVS to 2020
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*
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* Revision 1.3 1999/05/04 16:40:30 jprice
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* ror4 date fix
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*
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* Revision 1.2 1999/04/12 03:21:18 jprice
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* more ror4 patches. Changes for multi-block IO
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*
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* Revision 1.1.1.1 1999/03/29 15:41:34 jprice
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* New version without IPL.SYS
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*
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* Revision 1.5 1999/02/08 05:55:58 jprice
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* Added Pat's 1937 kernel patches
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*
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* Revision 1.4 1999/02/04 03:14:07 jprice
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* Formating. Added comments.
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*
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* Revision 1.3 1999/02/01 01:48:41 jprice
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* Clean up; Now you can use hex numbers in config.sys. added config.sys screen function to change screen mode (28 or 43/50 lines)
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*
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* Revision 1.2 1999/01/22 04:13:27 jprice
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* Formating
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*
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* Revision 1.1.1.1 1999/01/20 05:51:01 jprice
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* Imported sources
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*
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*
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* Rev 1.6 06 Dec 1998 8:47:30 patv
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* Bug fixes.
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*
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* Rev 1.5 04 Jan 1998 23:15:22 patv
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* Changed Log for strip utility
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*
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* Rev 1.4 03 Jan 1998 8:36:50 patv
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* Converted data area to SDA format
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*
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* Rev 1.3 29 May 1996 21:03:40 patv
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* bug fixes for v0.91a
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*
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* Rev 1.2 19 Feb 1996 3:21:34 patv
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* Added NLS, int2f and config.sys processing
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*
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* Rev 1.1 01 Sep 1995 17:54:16 patv
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* First GPL release.
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*
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* Rev 1.0 02 Jul 1995 8:32:20 patv
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* Initial revision.
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*/
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static WORD days[2][13] =
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{
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{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365},
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{0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366}
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};
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static WORD ndays[2][13] =
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{
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/* 1 2 3 4 5 6 7 8 9 10 11 12 */
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{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
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{0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
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};
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extern BYTE
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Month,
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DayOfMonth,
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DayOfWeek;
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extern COUNT
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Year,
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YearsSince1980;
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extern request
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ClkReqHdr;
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VOID DosGetTime(BYTE FAR * hp, BYTE FAR * mp, BYTE FAR * sp, BYTE FAR * hdp)
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{
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ClkReqHdr.r_length = sizeof(request);
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ClkReqHdr.r_command = C_INPUT;
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ClkReqHdr.r_count = sizeof(struct ClockRecord);
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ClkReqHdr.r_trans = (BYTE FAR *) (&ClkRecord);
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ClkReqHdr.r_status = 0;
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execrh((request FAR *) & ClkReqHdr, (struct dhdr FAR *)clock);
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if (ClkReqHdr.r_status & S_ERROR)
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return;
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*hp = ClkRecord.clkHours;
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*mp = ClkRecord.clkMinutes;
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*sp = ClkRecord.clkSeconds;
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*hdp = ClkRecord.clkHundredths;
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}
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COUNT DosSetTime(BYTE FAR * hp, BYTE FAR * mp, BYTE FAR * sp, BYTE FAR * hdp)
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{
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DosGetDate((BYTE FAR *) & DayOfWeek, (BYTE FAR *) & Month,
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(BYTE FAR *) & DayOfMonth, (COUNT FAR *) & Year);
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ClkRecord.clkHours = *hp;
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ClkRecord.clkMinutes = *mp;
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ClkRecord.clkSeconds = *sp;
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ClkRecord.clkHundredths = *hdp;
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YearsSince1980 = Year - 1980;
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ClkRecord.clkDays = DayOfMonth - 1
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+ days[is_leap_year(Year)][Month - 1]
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+ ((YearsSince1980) * 365)
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+ ((YearsSince1980 + 3) / 4);
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ClkReqHdr.r_length = sizeof(request);
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ClkReqHdr.r_command = C_OUTPUT;
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ClkReqHdr.r_count = sizeof(struct ClockRecord);
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ClkReqHdr.r_trans = (BYTE FAR *) (&ClkRecord);
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ClkReqHdr.r_status = 0;
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execrh((request FAR *) & ClkReqHdr, (struct dhdr FAR *)clock);
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if (ClkReqHdr.r_status & S_ERROR)
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return char_error(&ClkReqHdr, (struct dhdr FAR *)clock);
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return SUCCESS;
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}
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VOID DosGetDate(wdp, mp, mdp, yp)
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BYTE FAR *wdp,
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FAR * mp,
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FAR * mdp;
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COUNT FAR *yp;
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{
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COUNT count,
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c;
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ClkReqHdr.r_length = sizeof(request);
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ClkReqHdr.r_command = C_INPUT;
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ClkReqHdr.r_count = sizeof(struct ClockRecord);
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ClkReqHdr.r_trans = (BYTE FAR *) (&ClkRecord);
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ClkReqHdr.r_status = 0;
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execrh((request FAR *) & ClkReqHdr, (struct dhdr FAR *)clock);
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if (ClkReqHdr.r_status & S_ERROR)
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return;
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for (Year = 1980, c = ClkRecord.clkDays; c > 0;)
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{
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count = is_leap_year(Year) ? 366 : 365;
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if (c >= count)
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{
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++Year;
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c -= count;
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}
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else
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break;
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}
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/* c contains the days left and count the number of days for */
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/* that year. Use this to index the table. */
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Month = 1;
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while (c >= ndays[count == 366][Month])
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{
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c -= ndays[count == 366][Month];
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++Month;
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}
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*mp = Month;
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*mdp = c + 1;
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*yp = Year;
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/* Day of week is simple. Take mod 7, add 2 (for Tuesday */
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/* 1-1-80) and take mod again */
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DayOfWeek = (ClkRecord.clkDays % 7 + 2) % 7;
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*wdp = DayOfWeek;
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}
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COUNT DosSetDate(mp, mdp, yp)
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BYTE FAR *mp,
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FAR * mdp;
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COUNT FAR *yp;
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{
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Month = *mp;
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DayOfMonth = *mdp;
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Year = *yp;
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if (Year < 1980 || Year > 2099
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|| Month < 1 || Month > 12
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|| DayOfMonth < 1 || DayOfMonth > ndays[is_leap_year(Year)][Month])
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return DE_INVLDDATA;
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DosGetTime((BYTE FAR *) & ClkRecord.clkHours,
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(BYTE FAR *) & ClkRecord.clkMinutes,
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(BYTE FAR *) & ClkRecord.clkSeconds,
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(BYTE FAR *) & ClkRecord.clkHundredths);
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YearsSince1980 = Year - 1980;
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ClkRecord.clkDays = DayOfMonth - 1
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+ days[is_leap_year(Year)][Month - 1]
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+ ((YearsSince1980) * 365)
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+ ((YearsSince1980 + 3) / 4);
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ClkReqHdr.r_length = sizeof(request);
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ClkReqHdr.r_command = C_OUTPUT;
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ClkReqHdr.r_count = sizeof(struct ClockRecord);
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ClkReqHdr.r_trans = (BYTE FAR *) (&ClkRecord);
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ClkReqHdr.r_status = 0;
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execrh((request FAR *) & ClkReqHdr, (struct dhdr FAR *)clock);
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if (ClkReqHdr.r_status & S_ERROR)
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return char_error(&ClkReqHdr, (struct dhdr FAR *)clock);
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return SUCCESS;
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}
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