CAB Archive Format(cab.rfh):
Class: Archive, Status: Headers only, Last change: 4/16/2002 10:00:30 AM

type

TMagic array[4]of Char

data

0 TMagic Magic

assert Magic='MSCF';

type

DWORD ulong

TCAB_FLAGS set 16 of (
  HASPREV ^ 0x0001,
  HASNEXT ^ 0x0002,
  RESERVE ^ 0x0004
)

// =================================================================
// CABINET STRUCTURES
// =================================================================
TCAB_HEADER struc
//    DWORD sig             // file signature 'MSCF' (CAB_SIGNATURE)
  DWORD csumHeader       // header checksum (0 if not used)
  DWORD cbCabinet        // cabinet file size
  DWORD csumFolders      // folders checksum (0 if not used)
  DWORD coffFiles        // offset of first CAB_ENTRY
  DWORD csumFiles        // files checksum (0 if not used)
  WORD  version          // cabinet version (CAB_VERSION)
  WORD  cFolders         // number of folders
  WORD  cFiles           // number of files
  TCAB_FLAGS  flags      // cabinet flags (CAB_FLAG_*)
  WORD  setID            // cabinet set id
  WORD  iCabinet         // zero-based cabinet number
ends

data
  0x0004 TCAB_HEADER Hdr

assert Hdr.version=0x103;

descr ('Microsoft CAB Archive File Format.',NL,
  'Info Source: Inside Windows Cabinet Files by Sven B. Schreiber',NL,
  '  (CAB.ZIP at www.wotsit.org)',NL)

type

TCabInfo struc
  PChar CabName
  PChar DiskName
ends

TReserveInfo struc
  DWORD Size
  raw[@.Size] D
ends

TCAB_FOLDER struc
  DWORD coffCabStart     // offset of folder data
  WORD  cCFData          // ???
  WORD  typeCompress     // compression type (tcomp* in FDI.h)
ends

//-----------------------------------------------------------------

TCAB_ATTRIB set 16 of (
  READONLY ^ 0x0001,
  HIDDEN ^ 0x0002,
  SYSTEM ^ 0x0004,
  VOLUME ^ 0x0008,
  DIRECTORY ^ 0x0010,
  ARCHIVE ^ 0x0020
)

type bit

TFileDate struc pas
  D: num+(5)
  Mon: num+(4)
  Y: num+(7)
ends:displ=(INT(@.D),'.',INT(@.Mon),'.',INT(@.Y+1980))

TFileTime struc pas
  S: num+(5)
  M: num+(6)
  H: num+(5)
ends:displ=(INT(@.H),':',INT(@.M),':',INT(@.S*2))

type
TCabControl enum word (
  FIRST     = 0x0000,
  NEXT      = 0x0001,
  SPLIT     = 0xFFFE,
  CONTINUED = 0xFFFD
)

TCAB_ENTRY struc
  DWORD cbFile           // uncompressed file size
  DWORD uoffFolderStart  // file offset after decompression
  TCabControl iFolder    // file control id (CAB_FILE_*)
  TFileDate date         // file date stamp, as used by DOS
  TFileTime time         // file time stamp, as used by DOS
  TCAB_ATTRIB attribs    // file attributes (CAB_ATTRIB_*)
  PChar FName
ends


TCabData struc
  case (Hdr.flags and TCAB_FLAGS.RESERVE)<>0 of
    1: TReserveInfo
  endc RsrvInfo
  case (Hdr.flags and TCAB_FLAGS.HasPrev)<>0 of
    1: TCabInfo
  endc PrevCab
  case (Hdr.flags and TCAB_FLAGS.HasNext)<>0 of
    1: TCabInfo
  endc NextCab
  array[Hdr.cFolders] of TCAB_FOLDER Folders
  array[Hdr.cFiles] of TCAB_ENTRY Entries
ends

data
  0x0004+Hdr:Size; TCabData CabData
/*
Listing One
// =================================================================
// CAB FILE LAYOUT
// =================================================================
/*
(1) CAB_HEADER structure
(2) Reserved area, if CAB_HEADER.flags & CAB_FLAG_RESERVE
(3) Previous cabinet name, if CAB_HEADER.flags & CAB_FLAG_HASPREV
(4) Previous disk name, if CAB_HEADER.flags & CAB_FLAG_HASPREV
(5) Next cabinet name, if CAB_HEADER.flags & CAB_FLAG_HASNEXT
(6) Next disk name, if CAB_HEADER.flags & CAB_FLAG_HASNEXT
(7) CAB_FOLDER structures (n = CAB_HEADER.cFolders)
(8) CAB_ENTRY structures / file names (n = CAB_HEADER.cFiles)
(9) File data (offset = CAB_FOLDER.coffCabStart)
*/
*/



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