#include <stdint.h>
#include "drivers/disk/disk.h"
#include "drivers/disk/disk_streamer.h"
#include "fs/file.h"

Data Structures
struct	fat16_header_primary
struct	fat16_header_extended
struct	fat_header
union	fat_header::fat_header_extended
union	fat_header_extended
struct	fat_file
struct	fat_directory
struct	fat_item
struct	fat_file_descriptor
struct	fat_private

Macros
#define	DEBUG_FAT16 0
#define	FAT16_SIGNATURE 0x29
#define	FAT16_FAT_ENTRY_SIZE 0x02
#define	FAT16_BAD_SECTOR 0xFF7
#define	FAT16_UNUSED 0x00
#define	FAT_ITEM_TYPE_DIRECTORY 0
#define	FAT_ITEM_TYPE_FILE 1
#define	FAT_FILE_READONLY 0x01
#define	FAT_FILE_HIDDEN 0x02
#define	FAT_FILE_SYSTEM 0x04
#define	FAT_FILE_VOLUME_LABEL 0x08
#define	FAT_FILE_SUBDIRECTORY 0x10
#define	FAT_FILE_ARCHVED 0x20
#define	FAT_FILE_DEVICE 0x40
#define	FAT_FILE_RESERVED 0x80
#define	FAT_FILE_LONGNAME (FAT_FILE_READONLY \| FAT_FILE_HIDDEN \| FAT_FILE_SYSTEM \| FAT_FILE_VOLUME_LABEL)

Typedefs
typedef unsigned int	FAT_ITEM_TYPE

Functions
struct fat16_header_primary	__attribute__ ((packed))
struct filesystem *	fat16_init_filesystem ()
	Prepares filesystem struct for generic filesystem driver use.
int	fat16_resolve (struct disk *disk)
	FAT16 filesystem resolver.
void *	fat16_open (void private_fs, struct path_part path, FILE_MODE mode)
	FAT16 Implementation of fopen.
int	fat16_read (void private_fs, void desc, uint32_t size, uint32_t nmemb, char *out)
	FAT16 Implementation of fread.
int	fat16_write (void private_fs, void desc, uint32_t size, uint32_t nmemb, char *in)
int	fat16_seek (void *desc, uint32_t offset, FILE_SEEK_MODE seek_mode)
	FAT16 Implementation of fseek.
int	fat16_stat (void desc, struct file_stat stat)
	FAT16 Implementation of fstat.
int	fat16_close (void *desc)
	FAT16 Implementation of fclose.

Variables
uint8_t	jmp_short [3]
uint8_t	oem_identifier [8]
uint16_t	bytes_per_sector
uint8_t	sectors_per_cluster
uint16_t	reserved_sectors
uint8_t	fat_copies
uint16_t	root_dir_entries
uint16_t	numeber_of_sectors
uint8_t	media_type
uint16_t	sectors_per_fat
uint16_t	sectors_per_track
uint16_t	number_of_heads
uint32_t	hidden_sectors
uint32_t	sectors_big
uint8_t	drive_number
uint8_t	win_nt_bit
uint8_t	signature
uint32_t	volume_id
uint8_t	volume_id_string [11]
uint8_t	system_id_string [8]
struct fat16_header_primary	primary
union fat_header_extended	shared
uint8_t	filename [8]
uint8_t	ext [3]
uint8_t	attribute
uint8_t	reserved
uint8_t	creation_time_tenths_of_a_sec
uint16_t	creation_time
uint16_t	creation_date
uint16_t	last_access
uint16_t	high_16bits_first_cluster
uint16_t	last_mod_time
uint16_t	last_mod_date
uint16_t	low_16bits_first_cluster
uint32_t	filesize
struct fat_directory	__attribute__

Macro Definition Documentation

◆ DEBUG_FAT16

#define DEBUG_FAT16 0

◆ FAT16_BAD_SECTOR

#define FAT16_BAD_SECTOR 0xFF7

◆ FAT16_FAT_ENTRY_SIZE

#define FAT16_FAT_ENTRY_SIZE 0x02

◆ FAT16_SIGNATURE

#define FAT16_SIGNATURE 0x29

◆ FAT16_UNUSED

#define FAT16_UNUSED 0x00

◆ FAT_FILE_ARCHVED

#define FAT_FILE_ARCHVED 0x20

◆ FAT_FILE_DEVICE

#define FAT_FILE_DEVICE 0x40

◆ FAT_FILE_HIDDEN

#define FAT_FILE_HIDDEN 0x02

◆ FAT_FILE_LONGNAME

#define FAT_FILE_LONGNAME (FAT_FILE_READONLY | FAT_FILE_HIDDEN | FAT_FILE_SYSTEM | FAT_FILE_VOLUME_LABEL)

◆ FAT_FILE_READONLY

#define FAT_FILE_READONLY 0x01

◆ FAT_FILE_RESERVED

#define FAT_FILE_RESERVED 0x80

◆ FAT_FILE_SUBDIRECTORY

#define FAT_FILE_SUBDIRECTORY 0x10

◆ FAT_FILE_SYSTEM

#define FAT_FILE_SYSTEM 0x04

◆ FAT_FILE_VOLUME_LABEL

#define FAT_FILE_VOLUME_LABEL 0x08

◆ FAT_ITEM_TYPE_DIRECTORY

#define FAT_ITEM_TYPE_DIRECTORY 0

◆ FAT_ITEM_TYPE_FILE

#define FAT_ITEM_TYPE_FILE 1

Typedef Documentation

◆ FAT_ITEM_TYPE

typedef unsigned int FAT_ITEM_TYPE

Function Documentation

◆ attribute()

struct fat16_header_primary __attribute__ ( (packed) )

◆ fat16_close()

int fat16_close ( void * desc )

FAT16 Implementation of fclose.

Parameters

desc	Internal file descriptor

Returns: int Status

References ALL_OK, and kdebug.

◆ fat16_init_filesystem()

struct filesystem * fat16_init_filesystem ( )

Prepares filesystem struct for generic filesystem driver use.

Returns: struct filesystem*

References fat16_fs, and strcpy().

◆ fat16_open()

void * fat16_open	(	void *	private_fs,
		struct path_part *	path,
		FILE_MODE	mode )

FAT16 Implementation of fopen.

Parameters

private_fs	Private filesystem data
path	Path to file
mode	Open mode (FILE_MODE_READ for readonly)

Returns: void* Pointer to private file descriptor

References fat_file_descriptor::cached_cluster, fat_file_descriptor::cached_offset_bytes, fat_file_descriptor::file, FILE_MODE_READ, kdebug, kzalloc(), path_part::part, and fat_file_descriptor::pos.

◆ fat16_read()

int fat16_read	(	void *	private_fs,
		void *	desc,
		uint32_t	size,
		uint32_t	nmemb,
		char *	out )

FAT16 Implementation of fread.

Parameters

private_fs	Private filesystem data
desc	Internal file descriptor
size	Size of block
nmemb	Number of blocks to read
out	Output buffer

Returns: int Status

References ALL_OK, fat_private::cluster_read_stream, fat_file_descriptor::file, fat_item::file, kdebug, offset, fat_file_descriptor::pos, and size.

◆ fat16_resolve()

int fat16_resolve ( struct disk * disk )

FAT16 filesystem resolver.

Parameters

disk	Disk to resolve

Returns: int Status

References ALL_OK, diskstreamer_close(), diskstreamer_new(), diskstreamer_read(), diskstreamer_seek(), EIO, ENOMEM, fat_header::fat_header_extended::extended, fat16_fs, disk::filesystem, disk::fs_private, fat_private::header, disk::id, kdebug, kzalloc(), fat_private::partition_offset, fat_private::root_directory, disk::sector_size, fat_header::shared, fat16_header_extended::signature, partition_entry::starting_lba, and type.

◆ fat16_seek()

int fat16_seek	(	void *	desc,
		uint32_t	offset,
		FILE_SEEK_MODE	seek_mode )

FAT16 Implementation of fseek.

Parameters

desc	Internal file descriptor
offset	Offset
seek_mode	Seek mode (SEEK_SET for absolute, SEEK_CUR for relative)

Returns: int Status

References ALL_OK, EINVARG, FAT_ITEM_TYPE_FILE, fat_file_descriptor::file, fat_item::file, fat_file::filesize, kdebug, offset, fat_file_descriptor::pos, SEEK_CUR, SEEK_END, SEEK_SET, and fat_item::type.

◆ fat16_stat()

int fat16_stat	(	void *	desc,
		struct file_stat *	stat )

FAT16 Implementation of fstat.

Parameters

desc	Internal file descriptor
stat	Output fstat struct

Returns: int Status

References ALL_OK, assert_not_reached, fat_file::attribute, FAT_FILE_READONLY, FAT_ITEM_TYPE_DIRECTORY, FAT_ITEM_TYPE_FILE, fat_file_descriptor::file, fat_item::file, FILE_STAT_FOLDER, FILE_STAT_READ_ONLY, fat_file::filesize, file_stat::filesize, file_stat::flags, kdebug, and fat_item::type.

◆ fat16_write()

int fat16_write	(	void *	private_fs,
		void *	desc,
		uint32_t	size,
		uint32_t	nmemb,
		char *	in )

References ENOTIMPL, kdebug, and size.

Variable Documentation

◆ attribute

struct window_message_framebuffer_data __attribute__

◆ attribute

uint8_t attribute

◆ bytes_per_sector

uint16_t bytes_per_sector

◆ creation_date

uint16_t creation_date

◆ creation_time

uint16_t creation_time

◆ creation_time_tenths_of_a_sec

uint8_t creation_time_tenths_of_a_sec

◆ drive_number

uint8_t drive_number

◆ ext

uint8_t ext[3]

◆ fat_copies

uint8_t fat_copies

◆ filename

uint8_t filename[8]

◆ filesize

uint32_t filesize

◆ hidden_sectors

uint32_t hidden_sectors

◆ high_16bits_first_cluster

uint16_t high_16bits_first_cluster

◆ jmp_short

uint8_t jmp_short[3]

◆ last_access

uint16_t last_access

◆ last_mod_date

uint16_t last_mod_date

◆ last_mod_time

uint16_t last_mod_time

◆ low_16bits_first_cluster

uint16_t low_16bits_first_cluster

◆ media_type

uint8_t media_type

◆ number_of_heads

uint16_t number_of_heads

◆ numeber_of_sectors

uint16_t numeber_of_sectors

◆ oem_identifier

uint8_t oem_identifier[8]

◆ primary

struct fat16_header_primary primary

◆ reserved

uint8_t reserved

◆ reserved_sectors

uint16_t reserved_sectors

◆ root_dir_entries

uint16_t root_dir_entries

◆ sectors_big

uint32_t sectors_big

◆ sectors_per_cluster

uint8_t sectors_per_cluster

◆ sectors_per_fat

uint16_t sectors_per_fat

◆ sectors_per_track

uint16_t sectors_per_track

◆ shared

union fat_header_extended shared

◆ signature

uint8_t signature

◆ system_id_string

uint8_t system_id_string[8]

◆ volume_id

uint32_t volume_id

◆ volume_id_string

uint8_t volume_id_string[11]

◆ win_nt_bit

uint8_t win_nt_bit

Data Structures

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ DEBUG_FAT16

◆ FAT16_BAD_SECTOR

◆ FAT16_FAT_ENTRY_SIZE

◆ FAT16_SIGNATURE

◆ FAT16_UNUSED

◆ FAT_FILE_ARCHVED

◆ FAT_FILE_DEVICE

◆ FAT_FILE_HIDDEN

◆ FAT_FILE_LONGNAME

◆ FAT_FILE_READONLY

◆ FAT_FILE_RESERVED

◆ FAT_FILE_SUBDIRECTORY

◆ FAT_FILE_SYSTEM

◆ FAT_FILE_VOLUME_LABEL

◆ FAT_ITEM_TYPE_DIRECTORY

◆ FAT_ITEM_TYPE_FILE

Typedef Documentation

◆ FAT_ITEM_TYPE

Function Documentation

◆ __attribute__()

◆ fat16_close()

◆ fat16_init_filesystem()

◆ fat16_open()

◆ fat16_read()

◆ fat16_resolve()

◆ fat16_seek()

◆ fat16_stat()

◆ fat16_write()

Variable Documentation

◆ __attribute__

◆ attribute

◆ bytes_per_sector

◆ creation_date

◆ creation_time

◆ creation_time_tenths_of_a_sec

◆ drive_number

◆ ext

◆ fat_copies

◆ filename

◆ filesize

◆ hidden_sectors

◆ high_16bits_first_cluster

◆ jmp_short

◆ last_access

◆ last_mod_date

◆ last_mod_time

◆ low_16bits_first_cluster

◆ media_type

◆ number_of_heads

◆ numeber_of_sectors

◆ oem_identifier

◆ primary

◆ reserved

◆ reserved_sectors

◆ root_dir_entries

◆ sectors_big

◆ sectors_per_cluster

◆ sectors_per_fat

◆ sectors_per_track

◆ shared

◆ signature

◆ system_id_string

◆ volume_id

◆ volume_id_string

◆ win_nt_bit

◆ attribute()

◆ attribute