/****************************************************************/
/*								*/
/*			     date.h				*/
/*								*/
/*		    DOS General Date Structure			*/
/*								*/
/*			Copyright (c) 1995			*/
/*			Pasquale J. Villani			*/
/*			All Rights Reserved			*/
/*								*/
/* This file is part of DOS-C.					*/
/*								*/
/* DOS-C is free software; you can redistribute it and/or	*/
/* modify it under the terms of the GNU General Public License	*/
/* as published by the Free Software Foundation; either version	*/
/* 2, or (at your option) any later version.			*/
/*								*/
/* DOS-C is distributed in the hope that it will be useful, but	*/
/* WITHOUT ANY WARRANTY; without even the implied warranty of	*/
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See	*/
/* the GNU General Public License for more details.		*/
/*								*/
/* You should have received a copy of the GNU General Public	*/
/* License along with DOS-C; see the file COPYING.  If not,	*/
/* write to the Free Software Foundation, 675 Mass Ave,		*/
/* Cambridge, MA 02139, USA.					*/
/****************************************************************/



/* $Logfile:   C:/dos-c/hdr/date.h_v  $ */
#ifdef MAIN
# ifndef IPL
static BYTE *date_hRcsId = "$Header:   C:/dos-c/hdr/date.h_v   1.2   01 Sep 1995 17:35:40   patv  $";
# endif
#endif

/*
 * $Log:   C:/dos-c/hdr/date.h_v  $
 *	
 *	   Rev 1.2   01 Sep 1995 17:35:40   patv
 *	First GPL release.
 *	
 *	   Rev 1.1   30 Jul 1995 20:43:48   patv
 *	Eliminated version strings in ipl
 *	
 *	   Rev 1.0   02 Jul 1995 10:39:28   patv
 *	Initial revision.
 */

/* FAT file date - takes the form of yyyy yyym mmmd dddd where physical	*/
/* year=1980+yyyyyy							*/

#define DT_YEAR(d)	(((d)>>9)&0x7f)
#define DT_MONTH(d)	(((d)>>5)&0x0f)
#define DT_DAY(d)	((d)&0x1f)

#define DT_ENCODE(m,d,y) ((((m)&0x0f)<<5)|((d)&0x1f)|(((y)&0x7f)<<9))

#define EPOCH_WEEKDAY	2	/* Tuesday (i. e.-  0 == Sunday)	*/
#define EPOCH_MONTH	1	/* January				*/
#define EPOCH_DAY	1	/* 1 for January 1			*/
#define EPOCH_YEAR	1980	/* for Tues 1-1-80 epoch		*/

typedef UWORD	date;