mirror of
https://github.com/reactos/reactos.git
synced 2024-12-28 01:55:19 +00:00
182 lines
No EOL
6.5 KiB
C
182 lines
No EOL
6.5 KiB
C
/*
|
|
* FreeLoader
|
|
* Copyright (C) 1999, 2000 Brian Palmer <brianp@sginet.com>
|
|
*
|
|
* 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 2 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, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#ifndef __FS_FAT_H
|
|
#define __FS_FAT_H
|
|
|
|
// Bootsector BPB defines
|
|
#define BPB_JMPBOOT 0
|
|
#define BPB_OEMNAME 3
|
|
#define BPB_BYTESPERSECTOR 11
|
|
#define BPB_SECTORSPERCLUSTER 13
|
|
#define BPB_RESERVEDSECTORS 14
|
|
#define BPB_NUMBEROFFATS 16
|
|
#define BPB_ROOTDIRENTRIES 17
|
|
#define BPB_TOTALSECTORS16 19
|
|
#define BPB_MEDIADESCRIPTOR 21
|
|
#define BPB_SECTORSPERFAT16 22
|
|
#define BPB_SECTORSPERTRACK 24
|
|
#define BPB_NUMBEROFHEADS 26
|
|
#define BPB_HIDDENSECTORS 28
|
|
#define BPB_TOTALSECTORS32 32
|
|
|
|
// Fat12/16 extended BPB defines
|
|
#define BPB_DRIVENUMBER16 36
|
|
#define BPB_RESERVED16_1 37
|
|
#define BPB_BOOTSIGNATURE16 38
|
|
#define BPB_VOLUMESERIAL16 39
|
|
#define BPB_VOLUMELABEL16 43
|
|
#define BPB_FILESYSTEMTYPE16 54
|
|
|
|
// Fat32 extended BPB defines
|
|
#define BPB_SECTORSPERFAT32 36
|
|
#define BPB_EXTENDEDFLAGS32 40
|
|
#define BPB_FILESYSTEMVERSION32 42
|
|
#define BPB_ROOTDIRSTARTCLUSTER32 44
|
|
#define BPB_FILESYSTEMINFOSECTOR32 48
|
|
#define BPB_BACKUPBOOTSECTOR32 50
|
|
#define BPB_RESERVED32_1 52
|
|
#define BPB_DRIVENUMBER32 64
|
|
#define BPB_RESERVED32_2 65
|
|
#define BPB_BOOTSIGNATURE32 66
|
|
#define BPB_VOLUMESERIAL32 67
|
|
#define BPB_VOLUMELABEL32 71
|
|
#define BPB_FILESYSTEMTYPE32 82
|
|
|
|
/*
|
|
* Structure of MSDOS directory entry
|
|
*/
|
|
typedef struct //_DIRENTRY
|
|
{
|
|
BYTE cFileName[11]; /* Filename + extension */
|
|
BYTE cAttr; /* File attributes */
|
|
BYTE cReserved[10]; /* Reserved area */
|
|
WORD wTime; /* Time last modified */
|
|
WORD wData; /* Date last modified */
|
|
WORD wCluster; /* First cluster number */
|
|
DWORD dwSize; /* File size */
|
|
} DIRENTRY, * PDIRENTRY;
|
|
|
|
/*
|
|
* Structure of internal file control block
|
|
*/
|
|
typedef struct //_FCB
|
|
{
|
|
BYTE cAttr; /* Open attributes */
|
|
BYTE cSector; /* Sector within cluster */
|
|
PDIRENTRY pDirptr; /* Pointer to directory entry */
|
|
WORD wDirSector; /* Directory sector */
|
|
WORD wFirstCluster; /* First cluster in file */
|
|
WORD wLastCluster; /* Last cluster read/written */
|
|
WORD wNextCluster; /* Next cluster to read/write */
|
|
WORD wOffset; /* Read/Write offset within sector */
|
|
DWORD dwSize; /* File size */
|
|
BYTE cBuffer[512]; /* Data transfer buffer */
|
|
} FCB, * PFCB;
|
|
|
|
typedef struct //_FAT_STRUCT
|
|
{
|
|
DWORD dwStartCluster; // File's starting cluster
|
|
DWORD dwCurrentCluster; // Current read cluster number
|
|
DWORD dwSize; // File size
|
|
DWORD dwCurrentReadOffset;// Amount of data already read
|
|
} FAT_STRUCT, * PFAT_STRUCT;
|
|
|
|
typedef struct //_FILE
|
|
{
|
|
//DIRENTRY de;
|
|
//FCB fcb;
|
|
FAT_STRUCT fat;
|
|
unsigned long filesize;
|
|
} FILE;
|
|
|
|
extern int nSectorBuffered; // Tells us which sector was read into SectorBuffer[]
|
|
extern BYTE SectorBuffer[512]; // 512 byte buffer space for read operations, ReadOneSector reads to here
|
|
|
|
extern int nFATType;
|
|
|
|
extern DWORD nBytesPerSector; // Bytes per sector
|
|
extern DWORD nSectorsPerCluster; // Number of sectors in a cluster
|
|
extern DWORD nReservedSectors; // Reserved sectors, usually 1 (the bootsector)
|
|
extern DWORD nNumberOfFATs; // Number of FAT tables
|
|
extern DWORD nRootDirEntries; // Number of root directory entries (fat12/16)
|
|
extern DWORD nTotalSectors16; // Number of total sectors on the drive, 16-bit
|
|
extern DWORD nSectorsPerFAT16; // Sectors per FAT table (fat12/16)
|
|
extern DWORD nSectorsPerTrack; // Number of sectors in a track
|
|
extern DWORD nNumberOfHeads; // Number of heads on the disk
|
|
extern DWORD nHiddenSectors; // Hidden sectors (sectors before the partition start like the partition table)
|
|
extern DWORD nTotalSectors32; // Number of total sectors on the drive, 32-bit
|
|
|
|
extern DWORD nSectorsPerFAT32; // Sectors per FAT table (fat32)
|
|
extern DWORD nExtendedFlags; // Extended flags (fat32)
|
|
extern DWORD nFileSystemVersion; // File system version (fat32)
|
|
extern DWORD nRootDirStartCluster; // Starting cluster of the root directory (fat32)
|
|
|
|
extern DWORD nRootDirSectorStart; // Starting sector of the root directory (fat12/16)
|
|
extern DWORD nDataSectorStart; // Starting sector of the data area
|
|
extern DWORD nSectorsPerFAT; // Sectors per FAT table
|
|
extern DWORD nRootDirSectors; // Number of sectors of the root directory (fat32)
|
|
extern DWORD nTotalSectors; // Total sectors on the drive
|
|
extern DWORD nNumberOfClusters; // Number of clusters on the drive
|
|
|
|
extern int FSType; // Type of filesystem on boot device, set by OpenDiskDrive()
|
|
|
|
extern char *pFileSysData; // Load address for filesystem data
|
|
extern char *pFat32FATCacheIndex; // Load address for filesystem data
|
|
|
|
BOOL OpenDiskDrive(int nDrive, int nPartition); // Opens the disk drive device for reading
|
|
BOOL ReadMultipleSectors(int nSect, int nNumberOfSectors, void *pBuffer);// Reads a sector from the open device
|
|
BOOL ReadOneSector(int nSect); // Reads one sector from the open device
|
|
BOOL OpenFile(char *filename, FILE *pFile); // Opens a file
|
|
int ReadFile(FILE *pFile, int count, void *buffer); // Reads count bytes from pFile into buffer
|
|
DWORD GetFileSize(FILE *pFile);
|
|
DWORD Rewind(FILE *pFile); // Rewinds a file and returns it's size
|
|
int feof(FILE *pFile);
|
|
int fseek(FILE *pFILE, DWORD offset);
|
|
|
|
BOOL FATLookupFile(char *file, PFAT_STRUCT pFatStruct);
|
|
int FATGetNumPathParts(char *name);
|
|
BOOL FATGetFirstNameFromPath(char *buffer, char *name);
|
|
void FATParseFileName(char *buffer, char *name);
|
|
DWORD FATGetFATEntry(DWORD nCluster);
|
|
BOOL FATOpenFile(char *szFileName, PFAT_STRUCT pFatStruct);
|
|
int FATReadCluster(DWORD nCluster, char *cBuffer);
|
|
int FATRead(PFAT_STRUCT pFatStruct, int nNumBytes, char *cBuffer);
|
|
int FATfseek(PFAT_STRUCT pFatStruct, DWORD offset);
|
|
|
|
|
|
#define EOF -1
|
|
|
|
#define ATTR_NORMAL 0x00
|
|
#define ATTR_READONLY 0x01
|
|
#define ATTR_HIDDEN 0x02
|
|
#define ATTR_SYSTEM 0x04
|
|
#define ATTR_VOLUMENAME 0x08
|
|
#define ATTR_DIRECTORY 0x10
|
|
#define ATTR_ARCHIVE 0x20
|
|
|
|
#define FS_FAT 1
|
|
#define FS_NTFS 2
|
|
#define FS_EXT2 3
|
|
|
|
#define FAT12 1
|
|
#define FAT16 2
|
|
#define FAT32 3
|
|
|
|
#endif // #defined __FS_FAT_H
|