fs/fdos/fdos.h

   1 /*
   2  * (C) Copyright 2002
   3  * Stäubli Faverges - <www.staubli.com>
   4  * Pierre AUBERT  p.aubert@staubli.com
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #ifndef _FDOS_H_
  26 #define _FDOS_H_
  27
  28
  29 #undef  FDOS_DEBUG
  30
  31 #ifdef  FDOS_DEBUG
  32 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  33 #else
  34 #define PRINTF(fmt,args...)
  35 #endif
  36
  37 /* Data structure describing media                                           */
  38 typedef struct fs
  39 {
  40     unsigned long       tot_sectors;
  41
  42     int                 cluster_size;
  43     int                 num_clus;
  44
  45     int                 fat_start;
  46     int                 fat_len;
  47     int                 nb_fat;
  48     int                 num_fat;
  49
  50     int                 dir_start;
  51     int                 dir_len;
  52
  53     unsigned char       *fat_buf;
  54
  55 } Fs_t;
  56
  57 /* Data structure describing one file system slot                            */
  58 typedef struct slot {
  59     int (*map) (struct fs *fs,
  60                 struct slot *file,
  61                 int where,
  62                 int *len);
  63     unsigned long FileSize;
  64
  65     unsigned short int FirstAbsCluNr;
  66     unsigned short int PreviousAbsCluNr;
  67     unsigned short int PreviousRelCluNr;
  68
  69     Directory_t dir;
  70 } Slot_t;
  71
  72 typedef struct file {
  73     char                *name;
  74     int                 Case;
  75     Fs_t                *fs;
  76     Slot_t              subdir;
  77     Slot_t              file;
  78 } File_t;
  79
  80
  81 /* dev.c                                                                     */
  82 int dev_read (void *buffer, int where, int len);
  83 int dev_open (void);
  84 int check_dev (BootSector_t *boot, Fs_t *fs);
  85
  86 /* fat.c                                                                     */
  87 unsigned int fat_decode (Fs_t *fs, unsigned int num);
  88 int read_fat (BootSector_t *boot, Fs_t *fs);
  89
  90 /* vfat.c                                                                    */
  91 int vfat_lookup (Slot_t *dir,
  92                  Fs_t *fs,
  93                  Directory_t *dirent,
  94                  int *entry,
  95                  int *vfat_start,
  96                  char *filename,
  97                  int flags,
  98                  char *outname,
  99                  Slot_t *file);
 100
 101 /* subdir.c                                                                  */
 102 char *basename (char *name);
 103 int open_subdir (File_t *desc);
 104 int open_file (Slot_t *file, Directory_t *dir);
 105 int read_file (Fs_t *fs,
 106                Slot_t *file,
 107                char *buf,
 108                int where,
 109                int len);
 110 void init_subdir (void);
 111
 112 /* fs.c                                                                      */
 113 int fs_init (Fs_t *fs);
 114
 115
 116 #endif
 117