Microsoft公司 .CAB文件格式[1]

Microsoft公司 .CAB文件格式

_Inside Windows Cabinet Files_

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)
*/

// =================================================================
// MACROS
// =================================================================
#define SWAPWORD(x)  ((WORD) (((x) << 8) | ((x) >> 8)))
#define SWAPDWORD(x) ((SWAPWORD ((WORD) (x)) << 16) | \
                      (SWAPWORD ((WORD) ((x) >> 16))))

// =================================================================
// CONSTANTS
// =================================================================
#define CAB_SIGNATURE        SWAPDWORD ('MSCF')
#define CAB_VERSION          0x0103

#define CAB_FLAG_HASPREV     0x0001
#define CAB_FLAG_HASNEXT     0x0002
#define CAB_FLAG_RESERVE     0x0004

#define CAB_ATTRIB_READONLY  0x0001
#define CAB_ATTRIB_HIDDEN    0x0002
#define CAB_ATTRIB_SYSTEM    0x0004
#define CAB_ATTRIB_VOLUME    0x0008
#define CAB_ATTRIB_DIRECTORY 0x0010
#define CAB_ATTRIB_ARCHIVE   0x0020

#define CAB_FILE_FIRST       0x0000
#define CAB_FILE_NEXT        0x0001
#define CAB_FILE_SPLIT       0xFFFE
#define CAB_FILE_CONTINUED   0xFFFD

#define CAB_NOTIFY_OK        1
#define CAB_NOTIFY_ERROR     0
#define CAB_NOTIFY_SKIP      0
#define CAB_NOTIFY_ABORT     (-1)

// =================================================================
// CABINET STRUCTURES
// =================================================================
typedef struct _CAB_HEADER
    {
    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
    WORD  flags;            // cabinet flags (CAB_FLAG_*)
    WORD  setID;            // cabinet set id
    WORD  iCabinet;         // zero-based cabinet number
    }
    CAB_HEADER, *PCAB_HEADER;
#define CAB_HEADER_ sizeof (CAB_HEADER)

// -----------------------------------------------------------------
typedef struct _CAB_FOLDER
    {
    DWORD coffCabStart;     // offset of folder data
    WORD  cCFData;          // ???
    WORD  typeCompress;     // compression type (tcomp* in FDI.h)

    }
    CAB_FOLDER, *PCAB_FOLDER;