LCOM1920-T02G10

/*        $NetBSD: direntry.h,v 1.7 2013/10/20 00:01:55 christos Exp $        */

/*-

 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.

 * Copyright (C) 1994, 1995, 1997 TooLs GmbH.

 * All rights reserved.

 * Original code by Paul Popelka (paulp@uts.amdahl.com) (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 (paulp@uts.amdahl.com)

 *

 * 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 {

        u_int8_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 */

        u_int8_t        deExtension[3];        /* extension, blank filled */

        u_int8_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 */

        u_int8_t        deReserved;        /* reserved */

        u_int8_t        deCHundredth;        /* hundredth of seconds in CTime */

        u_int8_t        deCTime[2];        /* create time */

        u_int8_t        deCDate[2];        /* create date */

        u_int8_t        deADate[2];        /* access date */

        u_int8_t        deHighClust[2];        /* high bytes of cluster number */

        u_int8_t        deMTime[2];        /* last update time */

        u_int8_t        deMDate[2];        /* last update date */

        u_int8_t        deStartCluster[2]; /* starting cluster of file */

        u_int8_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 {

        u_int8_t        weCnt;

#define        WIN_LAST        0x40

#define        WIN_CNT                0x3f

        u_int8_t        wePart1[10];

        u_int8_t        weAttributes;

#define        ATTR_WIN95        0x0f

        u_int8_t        weReserved1;

        u_int8_t        weChksum;

        u_int8_t        wePart2[12];

        u_int16_t        weReserved2;

        u_int8_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        unix2dostime(const struct timespec *tsp, int gmtoff, u_int16_t *ddp,

            u_int16_t *dtp, u_int8_t *dhp);

void        dos2unixtime(u_int dd, u_int dt, u_int dh, int gmtoff,

            struct timespec *tsp);

int        dos2unixfn(u_char dn[11], u_char *un, int lower);

int        unix2dosfn(const u_char *un, u_char dn[12], int unlen,

            u_int gen);

int        unix2winfn(const u_char *un, int unlen, struct winentry *wep,

            int cnt, int chksum);

int        winChkName(const u_char *un, int unlen, struct winentry *wep,

            int chksum);

int        win2unixfn(struct winentry *wep, struct dirent *dp, int chksum);

u_int8_t winChksum(u_int8_t *name);

int        winSlotCnt(const u_char *un, int unlen);

#endif /* _KERNEL || MAKEFS */

#endif /* _MSDOSFS_DIRENTRY_H_ */