* Copyright 2001-2008, pinc Software. All Rights Reserved.
* Released under the terms of the MIT license.
*/
#ifndef BITMAP_H
#define BITMAP_H
#include <SupportDefs.h>
class Disk;
class Inode;
class Bitmap {
public:
Bitmap(Disk *disk);
Bitmap();
~Bitmap();
status_t SetTo(Disk *disk);
status_t InitCheck();
off_t FreeBlocks() const;
off_t UsedBlocks() const { return fUsedBlocks; }
bool UsedAt(off_t block) const;
bool BackupUsedAt(off_t block) const;
bool BackupSetAt(off_t block,bool used);
void BackupSet(Inode *inode,bool used);
status_t Validate();
status_t CompareWithBackup();
bool TrustBlockContaining(off_t block) const;
size_t Size() const { return fSize; }
private:
Disk *fDisk;
uint32 *fBitmap;
uint32 *fBackupBitmap;
size_t fSize;
size_t fByteSize;
off_t fUsedBlocks;
};
#endif
