/*
* Copyright (c) 2008 Jakub Jermar
* Copyright (c) 2011 Oleg Romanenko
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup mkfat
* @{
*/
#ifndef FAT_FAT_DENTRY_H_
#define FAT_FAT_DENTRY_H_
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>
#include <unaligned.h>
#define IS_D_CHAR(ch) (isalnum(ch) || ch == '_')
#define FAT_STOP_CHARS "*?/\\\n\t|'"
#define FAT_NAME_LEN 8
#define FAT_EXT_LEN 3
#define FAT_VOLLABEL_LEN 11
#define FAT_NAME_DOT ". "
#define FAT_NAME_DOT_DOT ".. "
#define FAT_EXT_PAD " "
#define FAT_ATTR_RDONLY 0x01
#define FAT_ATTR_HIDDEN 0x02
#define FAT_ATTR_SYSTEM 0x04
#define FAT_ATTR_VOLLABEL 0x08
#define FAT_ATTR_SUBDIR 0x10
#define FAT_ATTR_ARCHIVE 0x20
#define FAT_ATTR_LFN \
(FAT_ATTR_RDONLY | FAT_ATTR_HIDDEN | FAT_ATTR_SYSTEM | FAT_ATTR_VOLLABEL)
#define FAT_LCASE_LOWER_NAME 0x08
#define FAT_LCASE_LOWER_EXT 0x10
#define FAT_PAD ' '
#define FAT_LFN_PAD 0xffff
#define FAT_SFN_CHAR '_'
#define FAT_DENTRY_UNUSED 0x00
#define FAT_DENTRY_E5_ESC 0x05
#define FAT_DENTRY_DOT 0x2e
#define FAT_DENTRY_ERASED 0xe5
#define FAT_LFN_LAST 0x40
#define FAT_LFN_ERASED 0x80
#define FAT_LFN_ORDER(d) ((d)->lfn.order)
#define FAT_IS_LFN(d) \
((FAT_LFN_ORDER((d)) & FAT_LFN_LAST) == FAT_LFN_LAST)
#define FAT_LFN_COUNT(d) \
(FAT_LFN_ORDER((d)) ^ FAT_LFN_LAST)
#define FAT_LFN_PART1(d) ((d)->lfn.part1)
#define FAT_LFN_PART2(d) ((d)->lfn.part2)
#define FAT_LFN_PART3(d) ((d)->lfn.part3)
#define FAT_LFN_ATTR(d) ((d)->lfn.attr)
#define FAT_LFN_CHKSUM(d) ((d)->lfn.check_sum)
#define FAT_LFN_NAME_LEN 260 /* characters */
#define FAT_LFN_NAME_SIZE STR_BOUNDS(FAT_LFN_NAME_LEN) /* bytes */
#define FAT_LFN_MAX_COUNT 20
#define FAT_LFN_PART1_SIZE 5
#define FAT_LFN_PART2_SIZE 6
#define FAT_LFN_PART3_SIZE 2
#define FAT_LFN_ENTRY_SIZE \
(FAT_LFN_PART1_SIZE + FAT_LFN_PART2_SIZE + FAT_LFN_PART3_SIZE)
typedef enum {
FAT_DENTRY_SKIP,
FAT_DENTRY_LAST,
FAT_DENTRY_FREE,
FAT_DENTRY_VALID,
FAT_DENTRY_LFN,
FAT_DENTRY_VOLLABEL
} fat_dentry_clsf_t;
typedef union {
struct {
uint8_t name[8];
uint8_t ext[3];
uint8_t attr;
uint8_t lcase;
uint8_t ctime_fine;
uint16_t ctime;
uint16_t cdate;
uint16_t adate;
union {
uint16_t eaidx; /* FAT12/FAT16 */
uint16_t firstc_hi; /* FAT32 */
} __attribute__((packed));
uint16_t mtime;
uint16_t mdate;
union {
uint16_t firstc; /* FAT12/FAT16 */
uint16_t firstc_lo; /* FAT32 */
} __attribute__((packed));
uint32_t size;
} __attribute__((packed));
struct {
uint8_t order;
uint16_t part1[FAT_LFN_PART1_SIZE];
uint8_t attr;
uint8_t type;
uint8_t check_sum;
uint16_t part2[FAT_LFN_PART2_SIZE];
uint16_t firstc_lo; /* MUST be 0 */
uint16_t part3[FAT_LFN_PART3_SIZE];
} __attribute__((packed)) lfn;
} __attribute__((packed)) fat_dentry_t;
#endif
/**
* @}
*/