text: 
  '''
  Copyright 2011 Jean-Baptiste B'edrune, Jean Sigwald
  
  Using New BSD License:
  Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
  
  1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
  
  2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
  
  3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  '''
  
  """
  HFS+:
  http://developer.apple.com/library/mac/#technotes/tn/tn1150.html
  
  Finder flags:
  http://mirror.informatimago.com/next/developer.apple.com/documentation/Carbon/Reference/Finder_Interface/finder_interface/constant_1.html
     kIsOnDesk = 0x0001,
     kColor = 0x000E,
     kIsShared = 0x0040,
     kHasNoINITs = 0x0080,
     kHasBeenInited = 0x0100,
     kHasCustomIcon = 0x0400,
     kIsStationery = 0x0800,
     kNameLocked = 0x1000,
     kHasBundle = 0x2000,
     kIsInvisible = 0x4000,
     kIsAlias = 0x8000
  """
  
  from construct import *
  
  def getString(obj):
      return obj.HFSUniStr255.unicode.replace('/', ':')
  
  kHFSRootParentID            = 1
  kHFSRootFolderID            = 2
  kHFSExtentsFileID           = 3
  kHFSCatalogFileID           = 4
  kHFSBadBlockFileID          = 5
  kHFSAllocationFileID        = 6
  kHFSStartupFileID           = 7
  kHFSAttributesFileID        = 8
  kHFSRepairCatalogFileID     = 14
  kHFSBogusExtentFileID       = 15
  kHFSFirstUserCatalogNodeID  = 16
  
  kBTLeafNode       = -1
  kBTIndexNode      =  0
  kBTHeaderNode     =  1
  kBTMapNode        =  2
  
  kHFSPlusFolderRecord        = 0x0001
  kHFSPlusFileRecord          = 0x0002
  kHFSPlusFolderThreadRecord  = 0x0003
  kHFSPlusFileThreadRecord    = 0x0004
  
  kHFSPlusAttrInlineData  = 0x10
  kHFSPlusAttrForkData    = 0x20
  kHFSPlusAttrExtents     = 0x30
  
  kForkTypeData = 0
  kForkTypeRsrc = 0xFF
  
  kHFSVolumeHardwareLockBit       =  7
  kHFSVolumeUnmountedBit          =  8
  kHFSVolumeSparedBlocksBit       =  9
  kHFSVolumeNoCacheRequiredBit    = 10
  kHFSBootVolumeInconsistentBit   = 11
  kHFSCatalogNodeIDsReusedBit     = 12
  kHFSVolumeJournaledBit          = 13
  kHFSVolumeSoftwareLockBit       = 15
  
  kHFSCaseFolding   = 0xCF	#Case folding (case-insensitive) # For HFSX only
  kHFSBinaryCompare = 0xBC	#Binary compare (case-sensitive) # For HFSX only
  
  # HFSPlusBSDInfo.fileMode values:
  S_ISUID = 0o004000     # set user id on execution
  S_ISGID = 0o002000     # set group id on execution
  S_ISTXT = 0o001000     # sticky bit
  
  S_IRWXU = 0o000700     # RWX mask for owner
  S_IRUSR = 0o000400     # R for owner
  S_IWUSR = 0o000200     # W for owner
  S_IXUSR = 0o000100     # X for owner
  
  S_IRWXG = 0o000070     # RWX mask for group
  S_IRGRP = 0o000040     # R for group
  S_IWGRP = 0o000020     # W for group
  S_IXGRP = 0o000010     # X for group
  
  S_IRWXO = 0o000007     # RWX mask for other
  S_IROTH = 0o000004     # R for other
  S_IWOTH = 0o000002     # W for other
  S_IXOTH = 0o000001     # X for other
  
  S_IFMT   = 0o170000    # type of file mask
  S_IFIFO  = 0o010000    # named pipe (fifo)
  S_IFCHR  = 0o020000    # character special
  S_IFDIR  = 0o040000    # directory
  S_IFBLK  = 0o060000    # block special
  S_IFREG  = 0o100000    # regular
  S_IFLNK  = 0o120000    # symbolic link
  S_IFSOCK = 0o140000    # socket
  S_IFWHT  = 0o160000    # whiteout
  
  DECMPFS_MAGIC = 0x636d7066  #cmpf
  
  HFSPlusExtentDescriptor = "HFSPlusExtentDescriptor" / Struct(
      "startBlock" / Int32ub,
      "blockCount" / Int32ub
  )
  HFSPlusExtentRecord = Array(8, "HFSPlusExtentDescriptor" / HFSPlusExtentDescriptor)
  
  HFSPlusForkData = "HFSPlusForkData" / Struct(
      "logicalSize" / Int64ub,
      "clumpSize" / Int32ub,
      "totalBlocks" / Int32ub,
      "HFSPlusExtentDescriptor" / Array(8, HFSPlusExtentDescriptor)
  )
  
  HFSPlusVolumeHeader= "HFSPlusVolumeHeader" / Struct(
      "signature" / Int16ub,
      "version" / Int16ub,
      "attributes" / Int32ub,
      "lastMountedVersion" / Int32ub,
      "journalInfoBlock" / Int32ub,
      "createDate" / Int32ub,
      "modifyDate" / Int32ub,
      "backupDate" / Int32ub,
      "checkedDate" / Int32ub,
      "fileCount" / Int32ub,
      "folderCount" / Int32ub,
      "blockSize" / Int32ub,
      "totalBlocks" / Int32ub,
      "freeBlocks" / Int32ub,
      "nextAllocation" / Int32ub,
      "rsrcClumpSize" / Int32ub,
      "dataClumpSize" / Int32ub,
      "nextCatalogID" / Int32ub,
      "writeCount" / Int32ub,
      "encodingsBitmap" / Int64ub,
      "finderInfo" / Array(8, Int32ub),
      "allocationFile" / HFSPlusForkData,
      "extentsFile" / HFSPlusForkData,
      "catalogFile" / HFSPlusForkData,
      "attributesFile" / HFSPlusForkData,
      "startupFile" / HFSPlusForkData
  )
  
  BTNodeDescriptor = "BTNodeDescriptor" / Struct(
      "fLink" / Int32ub,
      "bLink" / Int32ub,
      "kind" / Int8sb,
      "height" / Int8ub,
      "numRecords" / Int16ub,
      "reserved" / Int16ub
  )
  
  BTHeaderRec = "BTHeaderRec" / Struct(
      "treeDepth" / Int16ub,
      "rootNode" / Int32ub,
      "leafRecords" / Int32ub,
      "firstLeafNode" / Int32ub,
      "lastLeafNode" / Int32ub,
      "nodeSize" / Int16ub,
      "maxKeyLength" / Int16ub,
      "totalNodes" / Int32ub,
      "freeNodes" / Int32ub,
      "reserved1" / Int16ub,
      "clumpSize" / Int32ub,
      "btreeType" / Int8ub,
      "keyCompareType" / Int8ub,
      "attributes" / Int32ub,
      "reserved3" / Array(16, Int32ub)
  )
  
  HFSUniStr255 = "HFSUniStr255" / Struct(
      "length" / Int16ub,
      "unicode" / PaddedString(lambda ctx: ctx["length"] * 2, encoding="utf-16-be") # "unicode",
  )
  
  HFSPlusAttrKey = "HFSPlusAttrKey" / Struct(
      "keyLength" / Int16ub,
      "pad" / Int16ub,
      "fileID" / Int32ub,
      "startBlock" / Int32ub,
      "HFSUniStr255" / HFSUniStr255,
      #Int32ub("nodeNumber")
  )
  
  HFSPlusAttrInlineData = "HFSPlusAttrInlineData" / Struct(
      "reserved" / Array(2, Int32ub),
      "size" / Int32ub,
      "data" / Bytes(lambda ctx: ctx["size"])
  )
  
  HFSPlusAttrForkData = "HFSPlusAttrForkData" / Struct(
      "reserved" / Int32ub,
      HFSPlusForkData
  )
  
  HFSPlusAttrExtents = "HFSPlusAttrExtents" / Struct(
      "reserved" / Int32ub,
      HFSPlusExtentRecord
  )
  
  HFSPlusAttrRecord = "HFSPlusAttrRecord" / Struct(
      "recordType" / Int32ub,
      "data" / Switch(lambda ctx: ctx["recordType"], 
      {
          kHFSPlusAttrInlineData : HFSPlusAttrInlineData,
          kHFSPlusAttrForkData : HFSPlusAttrForkData,
          kHFSPlusAttrExtents: HFSPlusAttrExtents
      }  )
  )
  
  HFSPlusCatalogKey = "HFSPlusCatalogKey" / Struct(
      "keyLength" / Int16ub,
      "parentID" / Int32ub,
      "HFSUniStr255" / HFSUniStr255
  )
  
  HFSPlusBSDInfo = "HFSPlusBSDInfo" / Struct(
      "ownerID" / Int32ub,
      "groupID" / Int32ub,
      "adminFlags" / Int8ub,
      "ownerFlags" / Int8ub,
      "fileMode" / Int16ub,
      "union_special" / Int32ub  
  )
  
  Point = "Point" / Struct(
      "v" / Int16sb,
      "h" / Int16sb
  )
  Rect = "Rect" / Struct(
      "top" / Int16sb,
      "left" / Int16sb,
      "bottom" / Int16sb,
      "right" / Int16sb
  )
  
  FileInfo = "FileInfo" / Struct(
      "fileType" / PaddedString(4, "utf-8"), #Int32ub,
      "fileCreator" / PaddedString(4, "utf-8"), #Int32ub,
      "finderFlags" / Int16ub,
      Point,
      "reservedField" / Int16ub
  )
  
  ExtendedFileInfo = "ExtendedFileInfo" / Struct(
      "reserved1" / Array(2, Int16sb),
      "finderDateAdded" / Int32ub, # 4 bytes stores Finder.DateAdded as unix timestamp
      "extendedFinderFlags" / Int16ub,
      "reserved2" / Int16sb,
      "putAwayFolderID" / Int32sb
  )
  
  FolderInfo = "FolderInfo" / Struct(
      Rect,
      "finderFlags" / Int16ub,
      Point,
      "reservedField" / Int16ub
  )
  
  ExtendedFolderInfo = "ExtendedFolderInfo" / Struct(
      Point,
      "finderDateAdded" / Int32sb,
      "extendedFinderFlags" / Int16ub,
      "reserved2" / Int16sb,
      "putAwayFolderID" / Int32sb
  )
  
  HFSPlusCatalogFolder = "HFSPlusCatalogFolder" / Struct(
      "flags" / Int16ub,
      "valence" / Int32ub,
      "folderID" / Int32ub,
      "createDate" / Int32ub,
      "contentModDate" / Int32ub,
      "attributeModDate" / Int32ub,
      "accessDate" / Int32ub,
      "backupDate" / Int32ub,
      HFSPlusBSDInfo,
      FolderInfo,
      ExtendedFolderInfo,
      "textEncoding" / Int32ub,
      "reserved" / Int32ub
  )
  
  HFSPlusCatalogFile = "HFSPlusCatalogFile" / Struct(
      "flags" / Int16ub,
      "reserved1" / Int32ub,
      "fileID" / Int32ub,
      "createDate" / Int32ub,
      "contentModDate" / Int32ub,
      "attributeModDate" / Int32ub,
      "accessDate" / Int32ub,
      "backupDate" / Int32ub,
      HFSPlusBSDInfo,
      FileInfo,
      ExtendedFileInfo,
      "textEncoding" / Int32ub,
      "reserved2" / Int32ub,
      "dataFork" / HFSPlusForkData,
      "resourceFork" / HFSPlusForkData
  )
  
  HFSPlusCatalogThread = "HFSPlusCatalogThread" / Struct(
      "reserved" / Int16sb,
      "parentID" / Int32ub,
      "HFSUniStr255" / HFSUniStr255,
  )
  
  HFSPlusCatalogData = "HFSPlusCatalogData" / Struct(
      "recordType" / Int16ub,
      "data" / Switch(lambda ctx: ctx["recordType"], 
      {
          kHFSPlusFolderRecord : HFSPlusCatalogFolder,
          kHFSPlusFileRecord : HFSPlusCatalogFile,
          kHFSPlusFolderThreadRecord: HFSPlusCatalogThread,
          kHFSPlusFileThreadRecord: HFSPlusCatalogThread
      },
      #default=HFSPlusCatalogFolder #XXX: should not reach
      )
  )
  
  HFSPlusExtentKey = "HFSPlusExtentKey" / Struct(
      "keyLength" / Int16ub,
      "forkType" / Int8ub,
      "pad" / Int8ub,
      "fileID" / Int32ub,
      "startBlock" / Int32ub
  )
  
  HFSPlusDecmpfs  = "HFSPlusDecmpfs" / Struct(
     "compression_magic" / Int32ul,
     "compression_type" / Int32ul,
     "uncompressed_size" / Int64ul,
  )
  
  HFSPlusCmpfRsrcHead = "HFSPlusCmpfRsrcHead" / Struct(
      "headerSize" / Int32ub,
      "totalSize" / Int32ub,
      "dataSize" / Int32ub,
      "flags" / Int32ub
  )
  
  HFSPlusCmpfLZVNRsrcHead = "HFSPlusCmpfLZVNRsrcHead" / Struct(
      "headerSize" / Int32ul,
      "chunkOffsets" / Array(lambda ctx:ctx["headerSize"]//4 - 1, Int32ul)
  )
  
  HFSPlusCmpfRsrcBlock = "HFSPlusCmpfRsrcBlock" / Struct(
      "offset" / Int32ul,
      "size" / Int32ul
  )
  
  HFSPlusCmpfRsrcBlockHead = "HFSPlusCmpfRsrcBlockHead" / Struct(
      "dataSize" / Int32ub,
      "numBlocks" / Int32ul,
      "HFSPlusCmpfRsrcBlockArray" / Array(lambda ctx:ctx["numBlocks"], HFSPlusCmpfRsrcBlock)
  )
  
  HFSPlusCmpfEnd = "HFSPlusCmpfEnd" / Struct(
      "pad" / Array(6, Int32ub),
      "unk1" / Int16ub,
      "unk2" / Int16ub,
      "unk3" / Int16ub,
      "magic" / Int32ub,
      "flags" / Int32ub,
      "size" / Int64ub,
      "unk4" / Int32ub
  )
  
  
  """
  Journal stuff
  """
  JournalInfoBlock = "JournalInfoBlock" / Struct(
      "flags" / Int32ub,
      "device_signature" / Array(8, Int32ub),
      "offset" / Int64ub,
      "size" / Int64ub,
      "reserved" / Array(32, Int32ub)
  )
  
  journal_header = "journal_header" / Struct(
      "magic" / Int32ul,
      "endian" / Int32ul,
      "start" / Int64ul,
      "end" / Int64ul,
      "size" / Int64ul,
      "blhdr_size" / Int32ul,
      "checksum" / Int32ul,
      "jhdr_size" / Int32ul
  )
  
  block_info = "block_info" / Struct(
      "bnum" / Int64ul,
      "bsize" / Int32ul,
      "next" / Int32ul
  )
  
  block_list_header = "block_list_header" / Struct(
      "max_blocks" / Int16ul,
      "num_blocks" / Int16ul,
      "bytes_used" / Int32ul,
      "checksum" / Int8sl,
      "pad" / Int32ub,
      "block_info_array" / Array(lambda ctx:ctx["num_blocks"], block_info)
  )
  