fs/fdos/fdos.h

   1 /*
   2  * (C) Copyright 2002
   3  * Stäubli Faverges - <www.staubli.com>
   4  * Pierre AUBERT  p.aubert@staubli.com
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #ifndef _FDOS_H_
  10 #define _FDOS_H_
  11
  12
  13 #undef  FDOS_DEBUG
  14
  15 #ifdef  FDOS_DEBUG
  16 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  17 #else
  18 #define PRINTF(fmt,args...)
  19 #endif
  20
  21 /* Data structure describing media                                           */
  22 typedef struct fs
  23 {
  24     unsigned long       tot_sectors;
  25
  26     int                 cluster_size;
  27     int                 num_clus;
  28
  29     int                 fat_start;
  30     int                 fat_len;
  31     int                 nb_fat;
  32     int                 num_fat;
  33
  34     int                 dir_start;
  35     int                 dir_len;
  36
  37     unsigned char       *fat_buf;
  38
  39 } Fs_t;
  40
  41 /* Data structure describing one file system slot                            */
  42 typedef struct slot {
  43     int (*map) (struct fs *fs,
  44                 struct slot *file,
  45                 int where,
  46                 int *len);
  47     unsigned long FileSize;
  48
  49     unsigned short int FirstAbsCluNr;
  50     unsigned short int PreviousAbsCluNr;
  51     unsigned short int PreviousRelCluNr;
  52
  53     Directory_t dir;
  54 } Slot_t;
  55
  56 typedef struct file {
  57     char                *name;
  58     int                 Case;
  59     Fs_t                *fs;
  60     Slot_t              subdir;
  61     Slot_t              file;
  62 } File_t;
  63
  64
  65 /* dev.c                                                                     */
  66 int dev_read (void *buffer, int where, int len);
  67 int dev_open (void);
  68 int check_dev (BootSector_t *boot, Fs_t *fs);
  69
  70 /* fat.c                                                                     */
  71 unsigned int fat_decode (Fs_t *fs, unsigned int num);
  72 int read_fat (BootSector_t *boot, Fs_t *fs);
  73
  74 /* vfat.c                                                                    */
  75 int vfat_lookup (Slot_t *dir,
  76                  Fs_t *fs,
  77                  Directory_t *dirent,
  78                  int *entry,
  79                  int *vfat_start,
  80                  char *filename,
  81                  int flags,
  82                  char *outname,
  83                  Slot_t *file);
  84
  85 /* subdir.c                                                                  */
  86 char *basename (char *name);
  87 int open_subdir (File_t *desc);
  88 int open_file (Slot_t *file, Directory_t *dir);
  89 int read_file (Fs_t *fs,
  90                Slot_t *file,
  91                char *buf,
  92                int where,
  93                int len);
  94 void init_subdir (void);
  95
  96 /* fs.c                                                                      */
  97 int fs_init (Fs_t *fs);
  98
  99
 100 #endif