/* $NetBSD: direntry.h,v 1.12 2021/10/23 16:58:17 thorpej Exp $ */
/*-
* Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
* Copyright (C) 1994, 1995, 1997 TooLs GmbH.
* All rights reserved.
* Original code by Paul Popelka (
[email protected]) (see below).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Written by Paul Popelka (
[email protected])
*
* You can do anything you want with this software, just don't say you wrote
* it, and don't remove this notice.
*
* This software is provided "as is".
*
* The author supplies this software to be publicly redistributed on the
* understanding that the author is not responsible for the correct
* functioning of this software in any circumstances and is not liable for
* any damages caused by this software.
*
* October 1992
*/
#ifndef _MSDOSFS_DIRENTRY_H_
#define _MSDOSFS_DIRENTRY_H_
/*
* Structure of a dos directory entry.
*/
struct direntry {
uint8_t deName[8]; /* filename, blank filled */
#define SLOT_EMPTY 0x00 /* slot has never been used */
#define SLOT_E5 0x05 /* the real value is 0xe5 */
#define SLOT_DELETED 0xe5 /* file in this slot deleted */
uint8_t deExtension[3]; /* extension, blank filled */
uint8_t deAttributes; /* file attributes */
#define ATTR_NORMAL 0x00 /* normal file */
#define ATTR_READONLY 0x01 /* file is readonly */
#define ATTR_HIDDEN 0x02 /* file is hidden */
#define ATTR_SYSTEM 0x04 /* file is a system file */
#define ATTR_VOLUME 0x08 /* entry is a volume label */
#define ATTR_DIRECTORY 0x10 /* entry is a directory name */
#define ATTR_ARCHIVE 0x20 /* file is new or modified */
uint8_t deReserved; /* reserved */
uint8_t deCHundredth; /* hundredth of seconds in CTime */
uint8_t deCTime[2]; /* create time */
uint8_t deCDate[2]; /* create date */
uint8_t deADate[2]; /* access date */
uint8_t deHighClust[2]; /* high bytes of cluster number */
uint8_t deMTime[2]; /* last update time */
uint8_t deMDate[2]; /* last update date */
uint8_t deStartCluster[2]; /* starting cluster of file */
uint8_t deFileSize[4]; /* size of file in bytes */
};
static __inline uint8_t
msdos_dirchar(const struct direntry *de, size_t i) {
return i < sizeof(de->deName) ? de->deName[i] :
de->deExtension[i - sizeof(de->deName)];
}
/*
* Structure of a Win95 long name directory entry
*/
struct winentry {
uint8_t weCnt;
#define WIN_LAST 0x40
#define WIN_CNT 0x3f
uint8_t wePart1[10];
uint8_t weAttributes;
#define ATTR_WIN95 0x0f
uint8_t weReserved1;
uint8_t weChksum;
uint8_t wePart2[12];
uint16_t weReserved2;
uint8_t wePart3[4];
};
#define WIN_CHARS 13 /* Number of chars per winentry */
/*
* This is the format of the contents of the deTime field in the direntry
* structure.
* We don't use bitfields because we don't know how compilers for
* arbitrary machines will lay them out.
*/
#define DT_2SECONDS_MASK 0x1F /* seconds divided by 2 */
#define DT_2SECONDS_SHIFT 0
#define DT_MINUTES_MASK 0x7E0 /* minutes */
#define DT_MINUTES_SHIFT 5
#define DT_HOURS_MASK 0xF800 /* hours */
#define DT_HOURS_SHIFT 11
/*
* This is the format of the contents of the deDate field in the direntry
* structure.
*/
#define DD_DAY_MASK 0x1F /* day of month */
#define DD_DAY_SHIFT 0
#define DD_MONTH_MASK 0x1E0 /* month */
#define DD_MONTH_SHIFT 5
#define DD_YEAR_MASK 0xFE00 /* year - 1980 */
#define DD_YEAR_SHIFT 9
#if defined(_KERNEL) || defined(MAKEFS)
struct dirent;
void msdosfs_unix2dostime(const struct timespec *tsp, int gmtoff,
uint16_t *ddp, uint16_t *dtp, uint8_t *dhp);
void msdosfs_dos2unixtime(unsigned int dd, unsigned int dt, unsigned int dh,
int gmtoff, struct timespec *tsp);
int msdosfs_dos2unixfn(unsigned char dn[11], unsigned char *un, int lower);
int msdosfs_unix2dosfn(const unsigned char *un, unsigned char dn[12],
int unlen, unsigned int gen);
int msdosfs_unix2winfn(const unsigned char *un, int unlen,
struct winentry *wep, int cnt, int chksum, int utf8);
int msdosfs_winChkName(const unsigned char *un, int unlen,
struct winentry *wep, int chksum, int utf8);
int msdosfs_win2unixfn(struct winentry *wep, struct dirent *dp, int chksum,
uint16_t *namlen, int utf8);
uint8_t msdosfs_winChksum(uint8_t *name);
int msdosfs_winSlotCnt(const unsigned char *un, int unlen, int utf8);
#endif /* _KERNEL || MAKEFS */
#endif /* _MSDOSFS_DIRENTRY_H_ */
