/*
 * 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  /* BITMAP_H */