214dfed06b
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@57 6ac86273-5f31-0410-b378-82cca8765d1b
155 lines
6.3 KiB
C
155 lines
6.3 KiB
C
/****************************************************************/
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/* */
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/* fat.h */
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/* */
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/* FAT File System data structures & declarations */
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/* */
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/* November 26, 1991 */
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/* */
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/* Copyright (c) 1995 */
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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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#ifdef MAIN
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#ifdef VERSION_STRINGS
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static BYTE *fat_hRcsId = "$Id$";
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#endif
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#endif
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/*
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* $Log$
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* Revision 1.5 2000/08/06 04:18:21 jimtabor
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* See history.txt
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*
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* Revision 1.3 2000/05/25 20:56:19 jimtabor
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* Fixed project history
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*
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* Revision 1.2 2000/05/08 04:28:22 jimtabor
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* Update CVS to 2020
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*
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* Revision 1.1.1.1 2000/05/06 19:34:53 jhall1
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* The FreeDOS Kernel. A DOS kernel that aims to be 100% compatible with
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* MS-DOS. Distributed under the GNU GPL.
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*
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* Revision 1.2 1999/05/03 06:28:00 jprice
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* Changed some variables from signed to unsigned.
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*
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* Revision 1.1.1.1 1999/03/29 15:39:28 jprice
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* New version without IPL.SYS
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*
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* Revision 1.4 1999/02/01 01:40:06 jprice
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* Clean up
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*
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* Revision 1.3 1999/01/30 08:21:43 jprice
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* Clean up
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*
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* Revision 1.2 1999/01/22 04:17:40 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 1.5 04 Jan 1998 23:14:18 patv
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* Changed Log for strip utility
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*
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* Rev 1.4 29 May 1996 21:25:14 patv
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* bug fixes for v0.91a
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*
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* Rev 1.3 19 Feb 1996 3:15:30 patv
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* Added NLS, int2f and config.sys processing
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*
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* Rev 1.2 01 Sep 1995 17:35:42 patv
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* First GPL release.
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*
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* Rev 1.1 30 Jul 1995 20:43:48 patv
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* Eliminated version strings in ipl
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*
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* Rev 1.0 02 Jul 1995 10:39:40 patv
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* Initial revision.
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*/
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/* FAT file system attribute bits */
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#define D_NORMAL 0 /* normal */
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#define D_RDONLY 0x01 /* read-only file */
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#define D_HIDDEN 0x02 /* hidden */
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#define D_SYSTEM 0x04 /* system */
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#define D_VOLID 0x08 /* volume id */
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#define D_DIR 0x10 /* subdir */
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#define D_ARCHIVE 0x20 /* archive bit */
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/* /// Added D_DEVICE bit. - Ron Cemer */
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#define D_DEVICE 0x40 /* device bit */
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/* FAT file name constants */
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#define FNAME_SIZE 8
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#define FEXT_SIZE 3
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/* FAT deleted flag */
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#define DELETED 0xe5 /* if first char, delete file */
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/* FAT cluster to physical conversion macros */
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#define clus_add(cl_no) ((ULONG) (((ULONG) cl_no - 2L) \
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* (ULONG) cluster_size \
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+ (ULONG) data_start))
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#define clus2phys(cl_no,cl_size,d_st) ((ULONG) (((ULONG) cl_no - 2L) \
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* (ULONG) cl_size \
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+ (ULONG) d_st))
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/* Test for 16 bit or 12 bit FAT */
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#define SIZEOF_CLST16 2
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#define FAT_MAGIC 4086
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#define FAT_MAGIC16 65526
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#define FAT_MAGIC32 268435456
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#define ISFAT32(dpbp) (((dpbp)->dpb_size)>FAT_MAGIC16 || ((dpbp)->dpb_size)<=FAT_MAGIC32 )
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#define ISFAT16(dpbp) (((dpbp)->dpb_size)>FAT_MAGIC || ((dpbp)->dpb_size)<=FAT_MAGIC16 )
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#define ISFAT12(dpbp) (((dpbp)->dpb_size)<=FAT_MAGIC)
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/* FAT file system directory entry */
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struct dirent
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{
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UBYTE dir_name[FNAME_SIZE]; /* Filename */
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UBYTE dir_ext[FEXT_SIZE]; /* Filename extension */
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UBYTE dir_attrib; /* File Attribute */
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BYTE dir_reserved[10]; /* reserved */
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time dir_time; /* Time file created/updated */
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date dir_date; /* Date file created/updated */
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UWORD dir_start; /* Starting cluster */
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/* 1st available = 2 */
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ULONG dir_size; /* File size in bytes */
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};
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/* */
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/* filesystem sizeof(dirent) - may be different from core */
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/* */
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#define DIR_NAME 0
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#define DIR_EXT FNAME_SIZE
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#define DIR_ATTRIB FNAME_SIZE+FEXT_SIZE
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#define DIR_RESERVED FNAME_SIZE+FEXT_SIZE+1
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#define DIR_TIME FNAME_SIZE+FEXT_SIZE+11
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#define DIR_DATE FNAME_SIZE+FEXT_SIZE+13
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#define DIR_START FNAME_SIZE+FEXT_SIZE+15
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#define DIR_SIZE FNAME_SIZE+FEXT_SIZE+17
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#define DIRENT_SIZE 32
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