/*
 *  FCI.H -- File Compression Interface
 *
 *  Copyright (C) Microsoft Corporation 1993-1997
 *  All Rights Reserved.
 */

#ifdef  __cplusplus
extern "C" {
#endif

#ifndef INCLUDED_TYPES_FCI_FDI
#define INCLUDED_TYPES_FCI_FDI 1

#ifndef HUGE
#define HUGE
#endif

#ifndef FAR
#define FAR
#endif

#ifndef DIAMONDAPI
#define DIAMONDAPI __cdecl
#endif


//** Specify structure packing explicitly for clients of FCI
#pragma pack(4)

//** Don't redefine types defined in Win16 WINDOWS.H (_INC_WINDOWS)
//   or Win32 WINDOWS.H (_WINDOWS_)
//
#if !defined(_INC_WINDOWS) && !defined(_WINDOWS_)
typedef int            BOOL;     /* f */
typedef unsigned char  BYTE;     /* b */
typedef unsigned int   UINT;     /* ui */
typedef unsigned short USHORT;   /* us */
typedef unsigned long  ULONG;    /* ul */
#endif   // _INC_WINDOWS

typedef unsigned long  CHECKSUM; /* csum */

typedef unsigned long  UOFF;     /* uoff - uncompressed offset */
typedef unsigned long  COFF;     /* coff - cabinet file offset */


#ifndef TRUE
#define TRUE    1
#endif

#ifndef FALSE
#define FALSE   0
#endif

#ifndef NULL
#define NULL    0
#endif


/***    ERF - Error structure
 *
 *  This structure returns error information from FCI/FDI.  The caller should
 *  not modify this structure.
 */
typedef struct {
    int     erfOper;            // FCI/FDI error code -- see FDIERROR_XXX
                                //  and FCIERR_XXX equates for details.

    int     erfType;            // Optional error value filled in by FCI/FDI.
                                // For FCI, this is usually the C run-time
                                // *errno* value.

    BOOL    fError;             // TRUE => error present
} ERF;      /* erf */
typedef ERF FAR *PERF;  /* perf */

#ifdef _DEBUG
// don't hide statics from map during debugging
#define STATIC      
#else // !DEBUG
#define STATIC static
#endif // !DEBUG

#define CB_MAX_CHUNK            32768U
#define CB_MAX_DISK         0x7ffffffL
#define CB_MAX_FILENAME            256
#define CB_MAX_CABINET_NAME        256
#define CB_MAX_CAB_PATH            256
#define CB_MAX_DISK_NAME           256

/***    tcompXXX - Compression types
 *
 *  These are passed to FCIAddFile(), and are also stored in the CFFOLDER
 *  structures in cabinet files.
 *
 *  NOTE: We reserve bits for the TYPE, QUANTUM_LEVEL, and QUANTUM_MEM
 *        to provide room for future expansion.  Since this value is stored
 *        in the CFDATA records in the cabinet file, we don't want to
 *        have to change the format for existing compression configurations
 *        if we add new ones in the future.  This will allows us to read
 *        old cabinet files in the future.
 */

typedef unsigned short TCOMP; /* tcomp */

#define tcompMASK_TYPE          0x000F  // Mask for compression type
#define tcompTYPE_NONE          0x0000  // No compression
#define tcompTYPE_MSZIP         0x0001  // MSZIP
#define tcompTYPE_QUANTUM       0x0002  // Quantum
#define tcompTYPE_LZX           0x0003  // LZX
#define tcompBAD                0x000F  // Unspecified compression type

#define tcompMASK_LZX_WINDOW    0x1F00  // Mask for LZX Compression Memory
#define tcompLZX_WINDOW_LO      0x0F00  // Lowest LZX Memory (15)
#define tcompLZX_WINDOW_HI      0x1500  // Highest LZX Memory (21)
#define tcompSHIFT_LZX_WINDOW        8  // Amount to shift over to get int

#define tcompMASK_QUANTUM_LEVEL 0x00F0  // Mask for Quantum Compression Level
#define tcompQUANTUM_LEVEL_LO   0x0010  // Lowest Quantum Level (1)
#define tcompQUANTUM_LEVEL_HI   0x0070  // Highest Quantum Level (7)
#define tcompSHIFT_QUANTUM_LEVEL     4  // Amount to shift over to get int

#define tcompMASK_QUANTUM_MEM   0x1F00  // Mask for Quantum Compression Memory
#define tcompQUANTUM_MEM_LO     0x0A00  // Lowest Quantum Memory (10)
#define tcompQUANTUM_MEM_HI     0x1500  // Highest Quantum Memory (21)
#define tcompSHIFT_QUANTUM_MEM       8  // Amount to shift over to get int

#define tcompMASK_RESERVED      0xE000  // Reserved bits (high 3 bits)



#define CompressionTypeFromTCOMP(tc) \
            ((tc) & tcompMASK_TYPE)

#define CompressionLevelFromTCOMP(tc) \
            (((tc) & tcompMASK_QUANTUM_LEVEL) >> tcompSHIFT_QUANTUM_LEVEL)

#define CompressionMemoryFromTCOMP(tc) \
            (((tc) & tcompMASK_QUANTUM_MEM) >> tcompSHIFT_QUANTUM_MEM)

#define TCOMPfromTypeLevelMemory(t,l,m)           \
            (((m) << tcompSHIFT_QUANTUM_MEM  ) |  \
             ((l) << tcompSHIFT_QUANTUM_LEVEL) |  \
             ( t                             ))

#define LZXCompressionWindowFromTCOMP(tc) \
            (((tc) & tcompMASK_LZX_WINDOW) >> tcompSHIFT_LZX_WINDOW)

#define TCOMPfromLZXWindow(w)      \
            (((w) << tcompSHIFT_LZX_WINDOW ) |  \
             ( tcompTYPE_LZX ))


//** Revert to default structure packing
#pragma pack()

#endif // !INCLUDED_TYPES_FCI_FDI

#ifndef INCLUDED_FCI
#define INCLUDED_FCI 1

//** Specify structure packing explicitly for clients of FCI
#pragma pack(4)


/***    FCIERROR - Error codes returned in erf.erfOper field
 *
 */
typedef enum {
FCIERR_NONE,                // No error

FCIERR_OPEN_SRC,            // Failure opening file to be stored in cabinet
                            //  erf.erfTyp has C run-time *errno* value

FCIERR_READ_SRC,            // Failure reading file to be stored in cabinet
                            //  erf.erfTyp has C run-time *errno* value

FCIERR_ALLOC_FAIL,          // Out of memory in FCI

FCIERR_TEMP_FILE,           // Could not create a temporary file
                            //  erf.erfTyp has C run-time *errno* value

FCIERR_BAD_COMPR_TYPE,      // Unknown compression type

FCIERR_CAB_FILE,            // Could not create cabinet file
                            //  erf.erfTyp has C run-time *errno* value

FCIERR_USER_ABORT,          // Client requested abort

FCIERR_MCI_FAIL,            // Failure compressing data

} FCIERROR;


/*
 * FAT file attribute flag used by FCI/FDI to indicate that
 * the filename in the CAB is a UTF string
 */
#ifndef _A_NAME_IS_UTF
#define _A_NAME_IS_UTF  0x80
#endif

/*
 * FAT file attribute flag used by FCI/FDI to indicate that
 * the file should be executed after extraction
 */
#ifndef _A_EXEC
#define _A_EXEC         0x40
#endif


/***    HFCI - Handle to an FCI Context
 *
 */
typedef void * HFCI;


/***    CCAB - Current Cabinet
 *
 *  This structure is used for passing in the cabinet parameters to FCI,
 *  and is passed back on certain FCI callbacks to provide cabinet
 *  information to the client.
 */
typedef struct {
// longs first
    ULONG  cb;                  // size available for cabinet on this media
    ULONG  cbFolderThresh;      // Thresshold for forcing a new Folder

// then ints
    UINT   cbReserveCFHeader;   // Space to reserve in CFHEADER
    UINT   cbReserveCFFolder;   // Space to reserve in CFFOLDER
    UINT   cbReserveCFData;     // Space to reserve in CFDATA
    int    iCab;                // sequential numbers for cabinets
    int    iDisk;               // Disk number
#ifndef REMOVE_CHICAGO_M6_HACK
    int    fFailOnIncompressible; // TRUE => Fail if a block is incompressible
#endif

//  then shorts
    USHORT setID;               // Cabinet set ID

// then chars
    char   szDisk[CB_MAX_DISK_NAME];    // current disk name
    char   szCab[CB_MAX_CABINET_NAME];  // current cabinet name
    char   szCabPath[CB_MAX_CAB_PATH];  // path for creating cabinet
} CCAB; /* ccab */
typedef CCAB *PCCAB; /* pccab */


/***    FNFCIALLOC - Memory Allocation
 *      FNFCIFREE  - Memory Free
 *
 *  These are modeled after the C run-time routines malloc() and free()
 *  FCI expects error handling to be identical to these C run-time routines.
 *
 *  As long as you faithfully copy the semantics of malloc() and free(),
 *  you can supply any functions you like!
 *
 *  WARNING: You should never assume anything about the sequence of
 *           FNFCIALLOC and FNFCIFREE calls -- incremental releases of
 *           FCI may have radically different numbers of
 *           FNFCIALLOC calls and allocation sizes!
 */
//** Memory functions for FCI
typedef void HUGE * (FAR DIAMONDAPI *PFNFCIALLOC)(ULONG cb); /* pfna */
#define FNFCIALLOC(fn) void HUGE * FAR DIAMONDAPI fn(ULONG cb)

typedef void (FAR DIAMONDAPI *PFNFCIFREE)(void HUGE *memory); /* pfnf */
#define FNFCIFREE(fn) void FAR DIAMONDAPI fn(void HUGE *memory)


/***    PFNFCIOPEN  - File I/O callbacks for FCI
 *      PFNFCIREAD
 *      PFNFCIWRITE
 *      PFNFCICLOSE
 *      PFNFCISEEK
 *
 *  These are modeled after the C run-time routines _open, _read,
 *  _write, _close, and _lseek.  The values for the PFNFCIOPEN oflag
 *  and pmode calls are those defined for _open.  FCI expects error
 *  handling to be identical to these C run-time routines, except that
 *  the value of errno should be returned via *err.
 *
 *  As long as you faithfully copy these aspects, you can supply
 *  any functions you like!
 *
 *  WARNING: You should never assume you know what file is being
 *           opened at any one point in time!  It is possible
 *           that in a future implementations it may open temporary
 *           files or cabinet files in a different order.
 */
//** File I/O functions for FCI
typedef int  (FAR DIAMONDAPI *PFNFCIOPEN) (char FAR *pszFile, int oflag, int pmode, int FAR *err, void FAR *pv);
typedef UINT (FAR DIAMONDAPI *PFNFCIREAD) (int hf, void FAR *memory, UINT cb, int FAR *err, void FAR *pv);
typedef UINT (FAR DIAMONDAPI *PFNFCIWRITE)(int hf, void FAR *memory, UINT cb, int FAR *err, void FAR *pv);
typedef int  (FAR DIAMONDAPI *PFNFCICLOSE)(int hf, int FAR *err, void FAR *pv);
typedef long (FAR DIAMONDAPI *PFNFCISEEK) (int hf, long dist, int seektype, int FAR *err, void FAR *pv);
typedef int  (FAR DIAMONDAPI *PFNFCIDELETE) (char FAR *pszFile, int FAR *err, void FAR *pv);

#define FNFCIOPEN(fn) int FAR DIAMONDAPI fn(char FAR *pszFile, int oflag, int pmode, int FAR *err, void FAR *pv)
#define FNFCIREAD(fn) UINT FAR DIAMONDAPI fn(int hf, void FAR *memory, UINT cb, int FAR *err, void FAR *pv)
#define FNFCIWRITE(fn) UINT FAR DIAMONDAPI fn(int hf, void FAR *memory, UINT cb, int FAR *err, void FAR *pv)
#define FNFCICLOSE(fn) int FAR DIAMONDAPI fn(int hf, int FAR *err, void FAR *pv)
#define FNFCISEEK(fn) long FAR DIAMONDAPI fn(int hf, long dist, int seektype, int FAR *err, void FAR *pv)
#define FNFCIDELETE(fn) int FAR DIAMONDAPI fn(char FAR *pszFile, int FAR *err, void FAR *pv)