apps/fat/dirent.h

   1 /*
   2  * fat - A FAT* CDI driver
   3  *
   4  * Copyright (C) 2008 Janosch Gräf
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; either version 3 of the License, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef _DIRENT_H_
  21 #define _DIRENT_H_
  22
  23 #include <stdint.h>
  24
  25 #define fat32_first_cluster(de) ((((uint32_t)(de)->first_cluster_high)<<16)|(de)->first_cluster)
  26
  27 struct fat_dirent {
  28   /// Filename
  29   uint8_t filename[8];
  30
  31   /// Filename extension
  32   uint8_t filename_ext[3];
  33
  34   /// File attributes
  35   struct {
  36     /// Read only
  37     unsigned readonly:1;
  38
  39     /// File is hidden
  40     unsigned hidden:1;
  41
  42     /// System file
  43     unsigned system:1;
  44
  45     /// Volume label
  46     unsigned volume:1;
  47
  48     /// Directory
  49     unsigned dir:1;
  50
  51     /// Archiv
  52     unsigned archiv:1;
  53
  54     unsigned :2;
  55   } __attribute__ ((packed)) attr;
  56
  57   /// Reserved
  58   uint8_t res0;
  59
  60   /// Creation date
  61   struct {
  62     /// Decisecond
  63     uint8_t deci_second;
  64
  65     /// Hour
  66     unsigned hour:5;
  67
  68     /// Minute
  69     unsigned minute:6;
  70
  71     /// 2 Seconds
  72     unsigned two_secs:5;
  73
  74     /// Year (since 1980)
  75     unsigned year:7;
  76
  77     /// Month
  78     unsigned month:4;
  79
  80     /// Day of month
  81     unsigned day:5;
  82   } __attribute__ ((packed)) create_date;
  83
  84   /// Last access date
  85   struct {
  86     /// Year (since 1980)
  87     unsigned year:7;
  88
  89     /// Month
  90     unsigned month:4;
  91
  92     /// Day of month
  93     unsigned day:5;
  94   } __attribute__ ((packed)) access_date;
  95
  96   /// Higher 16 bits of first cluster (for FAT32)
  97   uint16_t first_cluster_high;
  98
  99   /// Last write date
 100   struct {
 101     /// Hour
 102     unsigned hour:5;
 103
 104     /// Minute
 105     unsigned minute:6;
 106
 107     /// 2 Seconds
 108     unsigned two_secs:5;
 109
 110     /// Year (since 1980)
 111     unsigned year:7;
 112
 113     /// Month
 114     unsigned month:4;
 115
 116     /// Day of month
 117     unsigned day:5;
 118   } __attribute__ ((packed)) write_date;
 119
 120   /// First cluster
 121   uint16_t first_cluster;
 122
 123   /// File size
 124   uint32_t file_size;
 125 } __attribute__ ((packed));
 126
 127 struct fat_dirent_long {
 128   /// Order
 129   uint8_t order;
 130
 131   /// Name (part 1)
 132   uint16_t name1[5];
 133
 134   /// File attributes
 135   struct {
 136     /// Read only
 137     unsigned readonly:1;
 138
 139     /// File is hidden
 140     unsigned hidden:1;
 141
 142     /// System file
 143     unsigned system:1;
 144
 145     /// Volume label
 146     unsigned volume:1;
 147
 148     /// Directory
 149     unsigned dir:1;
 150
 151     /// Archiv
 152     unsigned archiv:1;
 153
 154     unsigned :2;
 155   } __attribute__ ((packed)) attr;
 156
 157   /// Type of log directory entry (should be 0)
 158   uint8_t type;
 159
 160   /// Checksum of name
 161   uint8_t checksum;
 162
 163   /// Name (part 2)
 164   uint16_t name2[6];
 165
 166   /// Zero
 167   uint16_t zero;
 168
 169   /// Name (part 3)
 170   uint16_t name3[2];
 171 } __attribute__ ((packed));
 172
 173 #endif