123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*
|
|
* fileio.h
|
|
*
|
|
* Created on: Aug 23, 2011
|
|
* Author: Tiberiu
|
|
*/
|
|
|
|
#ifndef FILEIO_H_
|
|
#define FILEIO_H_
|
|
|
|
#include <types.h>
|
|
#include <time.h>
|
|
|
|
// Device routines, will read/write 'BlockSize' bytes per call
|
|
typedef uint32 (*DevReadRoutine)(uint32 offset, void* buffer);
|
|
typedef uint32 (*DevWriteRoutine)(uint32 offset, void* buffer);
|
|
|
|
enum FileFlags
|
|
{
|
|
FileFile = 0x1,
|
|
FileDirectory = 0x2,
|
|
FileCharDevice = 0x3,
|
|
FileBlockDevice = 0x4,
|
|
FilePipe = 0x5,
|
|
FileSymbolLink = 0x6,
|
|
FileMountPoint = 0x7,
|
|
FileOwnerRead = 0x8,
|
|
FileOwnerWrite = 0x10,
|
|
FileOwnerExecute = 0x20,
|
|
FileGroupRead = 0x40,
|
|
FileGroupWrite = 0x80,
|
|
FileGroupExecute = 0x100,
|
|
FileOtherRead = 0x200,
|
|
FileOtherWrite = 0x400,
|
|
FileOtherExecute = 0x800,
|
|
FileHidden = 0x1000,
|
|
};
|
|
|
|
|
|
typedef struct _FILE
|
|
{
|
|
uint32 DeviceId; // The VFS identifies the mounted device that uses this
|
|
uint32 Id; // The FS idenitifies files using this field
|
|
char Name[128];
|
|
|
|
/*** Looks like this:
|
|
* bits description
|
|
* 0-2 file type
|
|
* 3-5 owner permissions (rwx)
|
|
* 6-8 group permissions (rwx)
|
|
* 9-11 other permissions (rwx)
|
|
* 12 hidden
|
|
* 13-31 (unassigned yet)
|
|
*
|
|
* Note: In windows FS, the readonly and system attributes are set using permissions and userid */
|
|
uint32 Flags;
|
|
uint32 OwnerId, GroupId;
|
|
uint32 Size;
|
|
} FILE;
|
|
|
|
|
|
typedef struct _DirectoryEntry
|
|
{
|
|
char Name[128];
|
|
uint32 Flags, OwnerId, GroupId, Size;
|
|
TimeSystem TimeCreated, TimeModified, TimeAccessed;
|
|
|
|
} DirectoryEntry;
|
|
|
|
|
|
typedef struct {
|
|
uint32 Id;
|
|
uint32 FsId;
|
|
char Name[128];
|
|
|
|
uint32 BlockSize;
|
|
DevReadRoutine Read;
|
|
DevWriteRoutine Write;
|
|
} MountPoint;
|
|
|
|
|
|
// File system routines
|
|
typedef uint32 (*FsReadRoutine)(const MountPoint*, FILE*, uint32, uint32, uint8*);
|
|
typedef uint32 (*FsWriteRoutine)(const MountPoint*, FILE*, uint32, uint32, uint8*);
|
|
typedef FILE* (*FsOpenRoutine)(const MountPoint*, FILE*,string);
|
|
typedef DirectoryEntry* (*FsTestRoutine)(const MountPoint*, string); // Test if a file exists, and returns info
|
|
typedef FILE* (*FsCloseRoutine)(const MountPoint*, FILE*);
|
|
typedef DirectoryEntry* (*FsReadDirRoutine)(const MountPoint*,FILE*,uint32);
|
|
|
|
typedef uint32 (*FsDetectRoutine) (DevReadRoutine, uint32 blocksz);
|
|
|
|
// File system structure
|
|
typedef struct {
|
|
uint32 Id;
|
|
char Name[16];
|
|
|
|
FsDetectRoutine Detect;
|
|
FsOpenRoutine Open;
|
|
FsCloseRoutine Close;
|
|
FsReadRoutine Read;
|
|
FsWriteRoutine Write;
|
|
FsTestRoutine Test; // See if file exists without having to open it
|
|
FsReadDirRoutine ReadDirectory;
|
|
} FileSystem;
|
|
|
|
|
|
// Vfs routines
|
|
extern void VfsInstall ();
|
|
extern uint8 VfsInstallFs (FileSystem* fs);
|
|
extern uint32 VfsFindDevice (string dev);
|
|
extern uint32 VfsParsePath (string* path);
|
|
extern uint8 VfsMount (string Name, DevReadRoutine R, DevWriteRoutine W, uint32 BlockSize);
|
|
extern void VfsUnmount (uint32 dev_id);
|
|
extern FILE* VfsOpen (FILE* file, string path);
|
|
extern DirectoryEntry* VfsTest (string path);
|
|
extern FILE* VfsClose (FILE* file);
|
|
extern uint32 VfsRead (FILE* file, uint32 bsz, uint32 n, uint8* buffer);
|
|
extern uint32 VfsWrite (FILE* file, uint32 bsz, uint32 n, uint8* buffer);
|
|
extern DirectoryEntry* VfsReadDirectory (FILE* handle, uint32 index);
|
|
|
|
|
|
#endif /* FILEIO_H_ */
|