livefiles_hfs_plugin/lf_hfs_file_extent_mapping.h

   1 //
   2 //  lf_hfs_file_extent_mapping.h
   3 //  hfs
   4 //
   5 //  Created by Yakov Ben Zaken on 22/03/2018.
   6 //
   7
   8 #ifndef lf_hfs_file_extent_mapping_h
   9 #define lf_hfs_file_extent_mapping_h
  10
  11 /*    File Extent Mapping routines*/
  12 OSErr FlushExtentFile( ExtendedVCB *vcb );
  13
  14 int32_t CompareExtentKeysPlus( const HFSPlusExtentKey *searchKey, const HFSPlusExtentKey *trialKey );
  15
  16 OSErr SearchExtentFile( ExtendedVCB             *vcb,
  17                        const FCB               *fcb,
  18                        int64_t                 filePosition,
  19                        HFSPlusExtentKey        *foundExtentKey,
  20                        HFSPlusExtentRecord     foundExtentData,
  21                        u_int32_t               *foundExtentDataIndex,
  22                        u_int32_t               *extentBTreeHint,
  23                        u_int32_t               *endingFABNPlusOne );
  24
  25 OSErr TruncateFileC(    ExtendedVCB         *vcb,
  26                     FCB                 *fcb,
  27                     int64_t             peof,
  28                     int                 deleted,
  29                     int                 rsrc,
  30                     uint32_t            fileid,
  31                     Boolean             truncateToExtent );
  32
  33 OSErr ExtendFileC(  ExtendedVCB     *vcb,
  34                   FCB             *fcb,
  35                   int64_t         bytesToAdd,
  36                   u_int32_t       blockHint,
  37                   u_int32_t       flags,
  38                   int64_t         *actualBytesAdded );
  39
  40 OSErr MapFileBlockC(    ExtendedVCB     *vcb,
  41                     FCB             *fcb,
  42                     size_t          numberOfBytes,
  43                     off_t           offset,
  44                     daddr64_t       *startBlock,
  45                     size_t          *availableBytes );
  46
  47 OSErr HeadTruncateFile( ExtendedVCB     *vcb,
  48                        FCB             *fcb,
  49                        u_int32_t       headblks );
  50
  51 int AddFileExtent(  ExtendedVCB     *vcb,
  52                   FCB             *fcb,
  53                   u_int32_t       startBlock,
  54                   u_int32_t       blockCount );
  55
  56 Boolean NodesAreContiguous( ExtendedVCB     *vcb,
  57                            FCB             *fcb,
  58                            u_int32_t       nodeSize );
  59
  60 #endif /* lf_hfs_file_extent_mapping_h */