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rufus/src/dos.h

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/*
* Rufus: The Reliable USB Formatting Utility
* MS-DOS boot file extraction, from the FAT12 floppy image in diskcopy.dll
* Copyright © 2011-2013 Pete Batard <pete@akeo.ie>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* http://www.c-jump.com/CIS24/Slides/FAT/lecture.html
Ideally, we'd read the following from the FAT Boot Sector, but we have
a pretty good idea of what they are for a 1.44 MB floppy image */
#define FAT12_ROOTDIR_OFFSET 0x2600
#define FAT12_CLUSTER_SIZE 0x200 // = sector size
#define FAT12_DATA_START 0x4200
#define FAT12_CLUSTER_OFFSET ((FAT12_DATA_START/FAT12_CLUSTER_SIZE)-2) // First cluster in data area is #2
/*
* Lifted from ReactOS:
* http://reactos-mirror.googlecode.com/svn/trunk/reactos/drivers/filesystems/fastfat_new/fat.h
*/
#pragma pack(push, 1) // You *DO* want packed structs here
//
// Directory Structure:
//
typedef struct _FAT_TIME
{
union {
struct {
USHORT DoubleSeconds : 5;
USHORT Minute : 6;
USHORT Hour : 5;
};
USHORT Value;
};
} FAT_TIME, *PFAT_TIME;
//
//
//
typedef struct _FAT_DATE {
union {
struct {
USHORT Day : 5;
USHORT Month : 4;
/* Relative to 1980 */
USHORT Year : 7;
};
USHORT Value;
};
} FAT_DATE, *PFAT_DATE;
//
//
//
typedef struct _FAT_DATETIME {
union {
struct {
FAT_TIME Time;
FAT_DATE Date;
};
ULONG Value;
};
} FAT_DATETIME, *PFAT_DATETIME;
//
//
//
typedef struct _DIR_ENTRY
{
UCHAR FileName[11];
UCHAR Attributes;
UCHAR Case;
UCHAR CreationTimeTenMs;
FAT_DATETIME CreationDateTime;
FAT_DATE LastAccessDate;
union {
USHORT ExtendedAttributes;
USHORT FirstClusterOfFileHi;
};
FAT_DATETIME LastWriteDateTime;
USHORT FirstCluster;
ULONG FileSize;
} DIR_ENTRY, *PDIR_ENTRY;
// sizeof = 0x020
typedef struct _LONG_FILE_NAME_ENTRY {
UCHAR SeqNum;
UCHAR NameA[10];
UCHAR Attributes;
UCHAR Type;
UCHAR Checksum;
USHORT NameB[6];
USHORT Reserved;
USHORT NameC[2];
} LONG_FILE_NAME_ENTRY, *PLONG_FILE_NAME_ENTRY;
// sizeof = 0x020
#pragma pack(pop)
#define FAT_LFN_NAME_LENGTH \
(RTL_FIELD_SIZE(LONG_FILE_NAME_ENTRY, NameA) \
+ RTL_FIELD_SIZE(LONG_FILE_NAME_ENTRY, NameB) \
+ RTL_FIELD_SIZE(LONG_FILE_NAME_ENTRY, NameC))
#define FAT_FN_DIR_ENTRY_LAST 0x40
#define FAT_FN_MAX_DIR_ENTIES 0x14
#define FAT_BYTES_PER_DIRENT 0x20
#define FAT_BYTES_PER_DIRENT_LOG 0x05
#define FAT_DIRENT_NEVER_USED 0x00
#define FAT_DIRENT_REALLY_0E5 0x05
#define FAT_DIRENT_DIRECTORY_ALIAS 0x2e
#define FAT_DIRENT_DELETED 0xe5
#define FAT_CASE_LOWER_BASE 0x08
#define FAT_CASE_LOWER_EXT 0x10
#define FAT_DIRENT_ATTR_READ_ONLY 0x01
#define FAT_DIRENT_ATTR_HIDDEN 0x02
#define FAT_DIRENT_ATTR_SYSTEM 0x04
#define FAT_DIRENT_ATTR_VOLUME_ID 0x08
#define FAT_DIRENT_ATTR_DIRECTORY 0x10
#define FAT_DIRENT_ATTR_ARCHIVE 0x20
#define FAT_DIRENT_ATTR_DEVICE 0x40
#define FAT_DIRENT_ATTR_LFN (FAT_DIRENT_ATTR_READ_ONLY | \
FAT_DIRENT_ATTR_HIDDEN | \
FAT_DIRENT_ATTR_SYSTEM | \
FAT_DIRENT_ATTR_VOLUME_ID)
extern BOOL SetDOSLocale(const char* path, BOOL bFreeDOS);