mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 08:02:44 +00:00
106 lines
2.2 KiB
C++
106 lines
2.2 KiB
C++
/*
|
|
* Copyright (c) 2022, Undefine <undefine@undefine.pl>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/EnumBits.h>
|
|
#include <AK/Types.h>
|
|
|
|
namespace Kernel {
|
|
|
|
struct [[gnu::packed]] FAT32BootRecord {
|
|
u8 boot_jump[3];
|
|
char oem_identifier[8];
|
|
u16 bytes_per_sector;
|
|
u8 sectors_per_cluster;
|
|
u16 reserved_sector_count;
|
|
u8 fat_count;
|
|
u16 root_directory_entry_count;
|
|
u16 unused1;
|
|
u8 media_descriptor_type;
|
|
u16 unused2;
|
|
u16 sectors_per_track;
|
|
u16 head_count;
|
|
u32 hidden_sector_count;
|
|
u32 sector_count;
|
|
u32 sectors_per_fat;
|
|
u16 flags;
|
|
u16 fat_version;
|
|
u32 root_directory_cluster;
|
|
u16 fs_info_sector;
|
|
u16 backup_boot_sector;
|
|
u8 unused3[12];
|
|
u8 drive_number;
|
|
u8 unused4;
|
|
u8 signature;
|
|
u32 volume_id;
|
|
char volume_label_string[11];
|
|
char system_identifier_string[8];
|
|
};
|
|
static_assert(sizeof(FAT32BootRecord) == 90);
|
|
|
|
enum class FATAttributes : u8 {
|
|
ReadOnly = 0x01,
|
|
Hidden = 0x02,
|
|
System = 0x04,
|
|
VolumeID = 0x08,
|
|
Directory = 0x10,
|
|
Archive = 0x20,
|
|
LongFileName = 0x0F
|
|
};
|
|
|
|
AK_ENUM_BITWISE_OPERATORS(FATAttributes);
|
|
|
|
union FATPackedTime {
|
|
u16 value;
|
|
struct {
|
|
u16 second : 5;
|
|
u16 minute : 6;
|
|
u16 hour : 5;
|
|
};
|
|
};
|
|
static_assert(sizeof(FATPackedTime) == 2);
|
|
|
|
union FATPackedDate {
|
|
u16 value;
|
|
struct {
|
|
u16 day : 5;
|
|
u16 month : 4;
|
|
u16 year : 7;
|
|
};
|
|
};
|
|
static_assert(sizeof(FATPackedDate) == 2);
|
|
|
|
struct [[gnu::packed]] FATEntry {
|
|
char filename[8];
|
|
char extension[3];
|
|
FATAttributes attributes;
|
|
u8 unused1;
|
|
u8 creation_time_seconds;
|
|
FATPackedTime creation_time;
|
|
FATPackedDate creation_date;
|
|
FATPackedDate last_accessed_date;
|
|
u16 first_cluster_high;
|
|
FATPackedTime modification_time;
|
|
FATPackedDate modification_date;
|
|
u16 first_cluster_low;
|
|
u32 file_size;
|
|
};
|
|
static_assert(sizeof(FATEntry) == 32);
|
|
|
|
struct [[gnu::packed]] FATLongFileNameEntry {
|
|
u8 entry_index;
|
|
u16 characters1[5];
|
|
FATAttributes attributes;
|
|
u8 entry_type;
|
|
u8 checksum;
|
|
u16 characters2[6];
|
|
u16 zero;
|
|
u16 characters3[2];
|
|
};
|
|
static_assert(sizeof(FATLongFileNameEntry) == 32);
|
|
|
|
}
|