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 */ 48