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annotate fat.h @ 37:858d5959929f

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add diagram
author Matt Johnston <matt@ucc.asn.au>
date Thu, 27 Jun 2013 18:24:24 +0800
parents 5f9a40d6991b
children
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1
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2 /*
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3 * Copyright (c) 2006-2012 by Roland Riegel <[email protected]>
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4 *
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5 * This file is free software; you can redistribute it and/or modify
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6 * it under the terms of either the GNU General Public License version 2
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7 * or the GNU Lesser General Public License version 2.1, both as
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8 * published by the Free Software Foundation.
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9 */
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10
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11 #ifndef FAT_H
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12 #define FAT_H
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13
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14 #include <stdint.h>
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15 #include "fat_config.h"
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16
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17 #ifdef __cplusplus
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18 extern "C"
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19 {
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20 #endif
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21
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22 /**
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23 * \addtogroup fat
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24 *
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25 * @{
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26 */
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27 /**
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28 * \file
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29 * FAT header (license: GPLv2 or LGPLv2.1)
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30 *
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31 * \author Roland Riegel
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32 */
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33
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34 /**
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35 * \addtogroup fat_file
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36 * @{
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37 */
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38
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39 /** The file is read-only. */
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40 #define FAT_ATTRIB_READONLY (1 << 0)
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41 /** The file is hidden. */
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42 #define FAT_ATTRIB_HIDDEN (1 << 1)
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43 /** The file is a system file. */
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44 #define FAT_ATTRIB_SYSTEM (1 << 2)
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45 /** The file is empty and has the volume label as its name. */
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46 #define FAT_ATTRIB_VOLUME (1 << 3)
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47 /** The file is a directory. */
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48 #define FAT_ATTRIB_DIR (1 << 4)
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49 /** The file has to be archived. */
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50 #define FAT_ATTRIB_ARCHIVE (1 << 5)
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51
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52 /** The given offset is relative to the beginning of the file. */
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53 #define FAT_SEEK_SET 0
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54 /** The given offset is relative to the current read/write position. */
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55 #define FAT_SEEK_CUR 1
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56 /** The given offset is relative to the end of the file. */
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57 #define FAT_SEEK_END 2
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58
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59 /**
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60 * @}
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61 */
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62
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63 struct partition_struct;
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64 struct fat_fs_struct;
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65 struct fat_file_struct;
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66 struct fat_dir_struct;
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67
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68 /**
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69 * \ingroup fat_file
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70 * Describes a directory entry.
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71 */
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72 struct fat_dir_entry_struct
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73 {
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74 /** The file's name, truncated to 31 characters. */
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75 char long_name[32];
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76 /** The file's attributes. Mask of the FAT_ATTRIB_* constants. */
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77 uint8_t attributes;
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78 #if FAT_DATETIME_SUPPORT
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79 /** Compressed representation of modification time. */
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80 uint16_t modification_time;
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81 /** Compressed representation of modification date. */
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82 uint16_t modification_date;
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83 #endif
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84 /** The cluster in which the file's first byte resides. */
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85 cluster_t cluster;
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86 /** The file's size. */
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87 uint32_t file_size;
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88 /** The total disk offset of this directory entry. */
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89 offset_t entry_offset;
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90 };
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91
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92 struct fat_fs_struct* fat_open(struct partition_struct* partition);
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93 void fat_close(struct fat_fs_struct* fs);
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94
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95 struct fat_file_struct* fat_open_file(struct fat_fs_struct* fs, const struct fat_dir_entry_struct* dir_entry);
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96 void fat_close_file(struct fat_file_struct* fd);
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97 intptr_t fat_read_file(struct fat_file_struct* fd, uint8_t* buffer, uintptr_t buffer_len);
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98 intptr_t fat_write_file(struct fat_file_struct* fd, const uint8_t* buffer, uintptr_t buffer_len);
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99 uint8_t fat_seek_file(struct fat_file_struct* fd, int32_t* offset, uint8_t whence);
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100 uint8_t fat_resize_file(struct fat_file_struct* fd, uint32_t size);
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101
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102 struct fat_dir_struct* fat_open_dir(struct fat_fs_struct* fs, const struct fat_dir_entry_struct* dir_entry);
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103 void fat_close_dir(struct fat_dir_struct* dd);
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104 uint8_t fat_read_dir(struct fat_dir_struct* dd, struct fat_dir_entry_struct* dir_entry);
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105 uint8_t fat_reset_dir(struct fat_dir_struct* dd);
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106
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107 uint8_t fat_create_file(struct fat_dir_struct* parent, const char* file, struct fat_dir_entry_struct* dir_entry);
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108 uint8_t fat_delete_file(struct fat_fs_struct* fs, struct fat_dir_entry_struct* dir_entry);
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109 uint8_t fat_move_file(struct fat_fs_struct* fs, struct fat_dir_entry_struct* dir_entry, struct fat_dir_struct* parent_new, const char* file_new);
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110 uint8_t fat_create_dir(struct fat_dir_struct* parent, const char* dir, struct fat_dir_entry_struct* dir_entry);
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111 #define fat_delete_dir fat_delete_file
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112 #define fat_move_dir fat_move_file
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113
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114 void fat_get_file_modification_date(const struct fat_dir_entry_struct* dir_entry, uint16_t* year, uint8_t* month, uint8_t* day);
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115 void fat_get_file_modification_time(const struct fat_dir_entry_struct* dir_entry, uint8_t* hour, uint8_t* min, uint8_t* sec);
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116
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117 uint8_t fat_get_dir_entry_of_path(struct fat_fs_struct* fs, const char* path, struct fat_dir_entry_struct* dir_entry);
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118
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119 offset_t fat_get_fs_size(const struct fat_fs_struct* fs);
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120 offset_t fat_get_fs_free(const struct fat_fs_struct* fs);
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121
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122 /**
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123 * @}
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124 */
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125
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126 #ifdef __cplusplus
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127 }
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128 #endif
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129
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130 #endif
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131