profuse/Entry.h

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5.7 KiB
C
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#ifndef __DIRECTORY_H__
#define __DIRECTORY_H__
#include <vector>
#include <stdint.h>
#include "DateTime.h"
namespace ProFUSE {
class BlockDevice;
class Bitmap;
class FileEntry;
class Volume;
class Buffer;
enum Access {
DestroyEnabled = 0x80,
RenameEnabled = 0x40,
BackupNeeded = 0x20,
Invisible = 0x04,
WriteEnabled = 0x02,
ReadEnabled = 0x01
};
enum StorageType {
DeletedFile = 0x00,
SeedlingFile = 0x01,
SaplingFile = 0x02,
TreeFile = 0x03,
PascalFile = 0x04,
ExtendedFile = 0x05,
DirectoryFile = 0x0d,
DirectoryHeader = 0x0e,
VolumeHeader = 0x0f
};
class Entry {
public:
virtual ~Entry();
virtual void write(Buffer *) = 0;
unsigned storageType() const { return _storageType; }
unsigned nameLength() const { return _nameLength; }
const char *name() const { return _name; }
const char *namei() const { return _namei; }
unsigned caseFlag() const { return _caseFlag; }
void setName(const char *name);
// returns strlen() on success, 0 on failure.
static unsigned ValidName(const char *);
unsigned block() const { return _address / 512; }
unsigned offset() const { return _address % 512; }
unsigned address() const { return _address; }
unsigned index() const { return _index; }
Volume *volume() { return _volume; }
protected:
Entry(unsigned storageType, const char *name);
Entry(const void *bp);
void setStorageType(unsigned type)
{ _storageType = type; }
void setAddress(unsigned address)
{ _address = address; }
void setIndex(unsigned index)
{ _index = index; }
void setVolume(Volume *v)
{ _volume = v; }
private:
unsigned _address;
unsigned _index;
Volume *_volume;
unsigned _storageType;
unsigned _nameLength;
char _namei[15+1]; // insensitive, ie, uppercase.
char _name[15+1];
unsigned _caseFlag;
};
class Directory : public Entry {
public:
enum {
OffsetCreation = 0x18,
OffsetVersion = 0x1c,
OffsetMinVersion = 0x1d,
OffsetAccess = 0x1e,
OffsetEntryLength = 0x1f,
OffsetEntriesPerBlock = 0x20,
OffsetFileCount = 0x21
};
virtual ~Directory();
DateTime creation() const { return _creation; }
unsigned access() const { return _access; }
unsigned entryLength() const { return _entryLength; }
unsigned entriesPerBlock() const { return _entriesPerBlock; }
unsigned fileCount() const { return _fileCount; }
unsigned version() const { return _version; }
unsigned minVersion() const { return _minVersion; }
void setAccess(unsigned access);
protected:
Directory(unsigned type, const char *name);
Directory(const void *bp);
std::vector<FileEntry *> _children;
std::vector<unsigned> _entryBlocks;
void loadChildren(BlockDevice *, unsigned block);
private:
DateTime _creation;
unsigned _version;
unsigned _minVersion;
unsigned _access;
unsigned _entryLength; // always 0x27
unsigned _entriesPerBlock; //always 0x0d
unsigned _fileCount;
};
class VolumeDirectory: public Directory {
public:
enum {
OffsetLastMod = 0x12,
OffsetFileNameCaseFlag = 0x16,
OffsetBitmapPointer = 0x23,
OffsetTotalBlocks = 0x25
};
static VolumeDirectory *Create(const char *name, BlockDevice *device);
static VolumeDirectory *Create(BlockDevice *);
virtual ~VolumeDirectory();
unsigned bitmapPointer() const { return _bitmapPointer; }
unsigned totalBlocks() const { return _totalBlocks; }
// bitmap stuff...
int allocBlock();
void freeBlock(unsigned block);
virtual void write(Buffer *);
BlockDevice *device() const { return _device; }
private:
VolumeDirectory(const char *name, BlockDevice *device);
VolumeDirectory(BlockDevice *device, const void *bp);
Bitmap *_bitmap;
BlockDevice *_device;
DateTime _modification;
unsigned _totalBlocks;
unsigned _bitmapPointer;
// inode / free inode list?
};
class SubDirectory : public Directory {
public:
enum {
OffsetPasswordEnabled = 0x10,
OffsetParentPointer = 0x23,
OffsetParentEntryNumber = 0x25,
OffsetParentEntryLength = 0x26
};
SubDirectory(FileEntry *);
private:
unsigned _parentPointer;
unsigned _parentEntryNumber;
unsigned _parentEntryLength;
};
class FileEntry : public Entry {
public:
enum {
OffsetFileType = 0x10,
OffsetKeyPointer = 0x11,
OffsetBlocksUsed = 0x13,
OffsetEOF = 0x15,
OffsetCreation = 0x18,
OffsetVersion = 0x1c,
OffsetMinVersion = 0x1d,
OffsetFileNameCaseFlag = 0x1c,
OffsetAccess = 0x1e,
OffsetAuxType = 0x1f,
OffsetLastMod = 0x21,
OffsetHeaderPointer = 0x25
};
unsigned fileType() const { return _fileType; }
unsigned auxType() const { return _auxType; }
unsigned blocksUsed() const { return _blocksUsed; }
unsigned eof() const { return _eof; }
unsigned access() const { return _access; }
DateTime creation() const { return _creation; }
DateTime modification() const { return _modification; }
private:
void *acquirePointer();
void releasePointer();
unsigned _fileType;
unsigned _keyPointer;
unsigned _blocksUsed;
unsigned _eof;
DateTime _creation;
//version
//min version
unsigned _access;
unsigned _auxType;
DateTime _modification;
unsigned _headerPointer;
};
}
#endif