src/bin/bfs_tools/lib/Bitmap.h

   1 /*
   2  * Copyright 2001-2008, pinc Software. All Rights Reserved.
   3  * Released under the terms of the MIT license.
   4  */
   5 #ifndef BITMAP_H
   6 #define BITMAP_H
   7
   8
   9 #include <SupportDefs.h>
  10
  11 class Disk;
  12 class Inode;
  13
  14
  15 class Bitmap {
  16         public:
  17                 Bitmap(Disk *disk);
  18                 Bitmap();
  19                 ~Bitmap();
  20
  21                 status_t        SetTo(Disk *disk);
  22                 status_t        InitCheck();
  23
  24                 off_t           FreeBlocks() const;
  25                 off_t           UsedBlocks() const { return fUsedBlocks; }
  26
  27                 bool            UsedAt(off_t block) const;
  28                 bool            BackupUsedAt(off_t block) const;
  29                 bool            BackupSetAt(off_t block,bool used);
  30                 void            BackupSet(Inode *inode,bool used);
  31
  32                 status_t        Validate();
  33                 status_t        CompareWithBackup();
  34                 bool            TrustBlockContaining(off_t block) const;
  35
  36                 size_t          Size() const { return fSize; }
  37
  38         private:
  39                 Disk    *fDisk;
  40                 uint32  *fBitmap;
  41                 uint32  *fBackupBitmap;
  42                 size_t  fSize;
  43                 size_t  fByteSize;
  44                 off_t   fUsedBlocks;
  45 };
  46
  47 #endif  /* BITMAP_H */