FreeBSD/Linux Kernel Cross Reference
sys/msdosfs/direntry.h

     /*      $OpenBSD: direntry.h,v 1.8 2021/12/23 02:12:52 jsg Exp $        */
     /*      $NetBSD: direntry.h,v 1.13 1997/10/17 11:23:45 ws 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
     */
    
    /*
     * 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        deLowerCase;    /* case for base and extension */
    #define CASE_LOWER_BASE 0x08            /* base is lower case */
    #define CASE_LOWER_EXT  0x10            /* extension is lower case */
            u_int8_t        deCTimeHundredth; /* create time, 1/100th of a sec */
            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 byte 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 */
    };
    
    /*
     * 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
   
   #ifdef _KERNEL
   void unix2dostime(struct timespec *tsp, u_int16_t *ddp, u_int16_t *dtp, u_int8_t *dhp);
   void dos2unixtime(u_int dd, u_int dt, u_int dh, struct timespec *tsp);
   int dos2unixfn(u_char dn[11], u_char *un, int lower);
   int unix2dosfn(u_char *un, u_char dn[11], int unlen, u_int gen);
   int unix2winfn(u_char *un, int unlen, struct winentry *wep, int cnt, int chksum);
   int winChkName(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(u_char *un, int unlen);
   #endif  /* _KERNEL */

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