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/*
* FDI.H -- File Decompression 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 FDI
#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 DBG
// don't hide statics from map during debugging
#define STATIC
#else // !DBG
#define STATIC static
#endif // !DBG
#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
/*
* Concepts: * A *cabinet* file contains one or more *folders*. A folder contains * one or more (pieces of) *files*. A folder is by definition a * decompression unit, i.e., to extract a file from a folder, all of * the data from the start of the folder up through and including the * desired file must be read and decompressed. * * A folder can span one (or more) cabinet boundaries, and by implication * a file can also span one (or more) cabinet boundaries. Indeed, more * than one file can span a cabinet boundary, since FCI concatenates * files together into a single data stream before compressing (actually, * at most one file will span any one cabinet boundary, but FCI does * not know which file this is, since the mapping from uncompressed bytes * to compressed bytes is pretty obscure. Also, since FCI compresses * in blocks of 32K (at present), any files with data in a 32K block that * spans a cabinet boundary require FDI to read both cabinet files * to get the two halves of the compressed block). * * Overview: * The File Decompression Interface is used to simplify the reading of * cabinet files. A setup program will proceed in a manner very * similar to the pseudo code below. An FDI context is created, the * setup program calls FDICopy() for each cabinet to be processed. For * each file in the cabinet, FDICopy() calls a notification callback * routine, asking the setup program if the file should be copied. * This call-back approach is great because it allows the cabinet file * to be read and decompressed in an optimal manner, and also makes FDI * independent of the run-time environment -- FDI makes *no* C run-time * calls whatsoever. All memory allocation and file I/O functions are * passed into FDI by the client. * * main(...) * { * // Read INF file to construct list of desired files.
* // Ideally, these would be sorted in the same order as the
* // files appear in the cabinets, so that you can just walk
* // down the list in response to fdintCOPY_FILE notifications.
* * // Construct list of required cabinets.
* * hfdi = FDICreate(...); // Create FDI context
* For (cabinet in List of Cabinets) { * FDICopy(hfdi, cabinet,fdiNotify,...); // Process each cabinet
* } * FDIDestroy(hfdi); * ... * } * * // Notification callback function
* fdiNotify(fdint, ...) * { * If (User Aborted) // Permit cancellation
* if (fdint == fdintCLOSE_FILE_INFO) * close open file * return -1; * switch (fdint) { * case fdintCOPY_FILE: // File to copy, maybe
* // Check file against list of desired files
* if want to copy file * open destination file and return handle * else * return NULL; // Skip file
* case fdintCLOSE_FILE_INFO: * close file * set date, time, and attributes * * case fdintNEXT_CABINET: * if not an error callback * Tell FDI to use suggested directory name * else * Tell user what the problem was, and prompt * for a new disk and/or path. * if user aborts * Tell FDI to abort * else * return to FDI to try another cabinet * * default: * return 0; // more messages may be defined
* ... * } * * Error Handling Suggestions: * Since you the client have passed in *all* of the functions that * FDI uses to interact with the "outside" world, you are in prime * position to understand and deal with errors. * * The general philosophy of FDI is to pass all errors back up to * the client. FDI returns fairly generic error codes in the case * where one of the callback functions (PFNOPEN, PFNREAD, etc.) fail, * since it assumes that the callback function will save enough * information in a static/global so that when FDICopy() returns * fail, the client can examine this information and report enough * detail about the problem that the user can take corrective action. * * For very specific errors (CORRUPT_CABINET, for example), FDI returns * very specific error codes. * * THE BEST POLICY IS FOR YOUR CALLBACK ROUTINES TO AVOID RETURNING * ERRORS TO FDI! * * Examples: * (1) If the disk is getting full, instead of returning an error * from your PFNWRITE function, you should -- inside your * PFNWRITE function -- put up a dialog telling the user to free * some disk space. * (2) When you get the fdintNEXT_CABINET notification, you should * verify that the cabinet you return is the correct one (call * FDIIsCabinet(), and make sure the setID matches the one for * the current cabinet specified in the fdintCABINET_INFO, and * that the disk number is one greater. * * NOTE: FDI will continue to call fdintNEXT_CABINET until it * gets the cabinet it wants, or until you return -1 * to abort the FDICopy() call. * * The documentation below on the FDI error codes provides explicit * guidance on how to avoid each error. * * If you find you must return a failure to FDI from one of your * callback functions, then FDICopy() frees all resources it allocated * and closes all files. If you can figure out how to overcome the * problem, you can call FDICopy() again on the last cabinet, and * skip any files that you already copied. But, note that FDI does * *not* maintain any state between FDICopy() calls, other than possibly * memory allocated for the decompressor. * * See FDIERROR for details on FDI error codes and recommended actions. * * * Progress Indicator Suggestions: * As above, all of the file I/O functions are supplied by you. So, * updating a progress indicator is very simple. You keep track of * the target files handles you have opened, along with the uncompressed * size of the target file. When you see writes to the handle of a * target file, you use the write count to update your status! * Since this method is available, there is no separate callback from * FDI just for progess indication. */
#ifndef INCLUDED_FDI
#define INCLUDED_FDI 1
//** Specify structure packing explicitly for clients of FDI
#pragma pack(4)
/*** FDIERROR - Error codes returned in erf.erfOper field
* * In general, FDI will only fail if one of the passed in memory or * file I/O functions fails. Other errors are pretty unlikely, and are * caused by corrupted cabinet files, passing in a file which is not a * cabinet file, or cabinet files out of order. * * Description: Summary of error. * Cause: List of possible causes of this error. * Response: How client might respond to this error, or avoid it in * the first place. */typedef enum { FDIERROR_NONE, // Description: No error
// Cause: Function was successfull.
// Response: Keep going!
FDIERROR_CABINET_NOT_FOUND, // Description: Cabinet not found
// Cause: Bad file name or path passed to FDICopy(), or returned
// to fdintNEXT_CABINET.
// Response: To prevent this error, validate the existence of the
// the cabinet *before* passing the path to FDI.
FDIERROR_NOT_A_CABINET, // Description: Cabinet file does not have the correct format
// Cause: File passed to to FDICopy(), or returned to
// fdintNEXT_CABINET, is too small to be a cabinet file,
// or does not have the cabinet signature in its first
// four bytes.
// Response: To prevent this error, call FDIIsCabinet() to check a
// cabinet before calling FDICopy() or returning the
// cabinet path to fdintNEXT_CABINET.
FDIERROR_UNKNOWN_CABINET_VERSION, // Description: Cabinet file has an unknown version number.
// Cause: File passed to to FDICopy(), or returned to
// fdintNEXT_CABINET, has what looks like a cabinet file
// header, but the version of the cabinet file format
// is not one understood by this version of FDI. The
// erf.erfType field is filled in with the version number
// found in the cabinet file.
// Response: To prevent this error, call FDIIsCabinet() to check a
// cabinet before calling FDICopy() or returning the
// cabinet path to fdintNEXT_CABINET.
FDIERROR_CORRUPT_CABINET, // Description: Cabinet file is corrupt
// Cause: FDI returns this error any time it finds a problem
// with the logical format of a cabinet file, and any
// time one of the passed-in file I/O calls fails when
// operating on a cabinet (PFNOPEN, PFNSEEK, PFNREAD,
// or PFNCLOSE). The client can distinguish these two
// cases based upon whether the last file I/O call
// failed or not.
// Response: Assuming this is not a real corruption problem in
// a cabinet file, the file I/O functions could attempt
// to do retries on failure (for example, if there is a
// temporary network connection problem). If this does
// not work, and the file I/O call has to fail, then the
// FDI client will have to clean up and call the
// FDICopy() function again.
FDIERROR_ALLOC_FAIL, // Description: Could not allocate enough memory
// Cause: FDI tried to allocate memory with the PFNALLOC
// function, but it failed.
// Response: If possible, PFNALLOC should take whatever steps
// are possible to allocate the memory requested. If
// memory is not immediately available, it might post a
// dialog asking the user to free memory, for example.
// Note that the bulk of FDI's memory allocations are
// made at FDICreate() time and when the first cabinet
// file is opened during FDICopy().
FDIERROR_BAD_COMPR_TYPE, // Description: Unknown compression type in a cabinet folder
// Cause: [Should never happen.] A folder in a cabinet has an
// unknown compression type. This is probably caused by
// a mismatch between the version of FCI.LIB used to
// create the cabinet and the FDI.LIB used to read the
// cabinet.
// Response: Abort.
FDIERROR_MDI_FAIL, // Description: Failure decompressing data from a cabinet file
// Cause: The decompressor found an error in the data coming
// from the file cabinet. The cabinet file was corrupted.
// [11-Apr-1994 bens When checksuming is turned on, this
// error should never occur.]
// Response: Probably should abort; only other choice is to cleanup
// and call FDICopy() again, and hope there was some
// intermittent data error that will not reoccur.
FDIERROR_TARGET_FILE, // Description: Failure writing to target file
// Cause: FDI returns this error any time it gets an error back
// from one of the passed-in file I/O calls fails when
// writing to a file being extracted from a cabinet.
// Response: To avoid or minimize this error, the file I/O functions
// could attempt to avoid failing. A common cause might
// be disk full -- in this case, the PFNWRITE function
// could have a check for free space, and put up a dialog
// asking the user to free some disk space.
FDIERROR_RESERVE_MISMATCH, // Description: Cabinets in a set do not have the same RESERVE sizes
// Cause: [Should never happen]. FDI requires that the sizes of
// the per-cabinet, per-folder, and per-data block
// RESERVE sections be consistent across all the cabinets
// in a set.
// Response: Abort.
FDIERROR_WRONG_CABINET, // Description: Cabinet returned on fdintNEXT_CABINET is incorrect
// Cause: NOTE: THIS ERROR IS NEVER RETURNED BY FDICopy()!
// Rather, FDICopy() keeps calling the fdintNEXT_CABINET
// callback until either the correct cabinet is specified,
// or you return ABORT.
// When FDICopy() is extracting a file that crosses a
// cabinet boundary, it calls fdintNEXT_CABINET to ask
// for the path to the next cabinet. Not being very
// trusting, FDI then checks to make sure that the
// correct continuation cabinet was supplied! It does
// this by checking the "setID" and "iCabinet" fields
// in the cabinet. When MAKECAB.EXE creates a set of
// cabinets, it constructs the "setID" using the sum
// of the bytes of all the destination file names in
// the cabinet set. FDI makes sure that the 16-bit
// setID of the continuation cabinet matches the
// cabinet file just processed. FDI then checks that
// the cabinet number (iCabinet) is one more than the
// cabinet number for the cabinet just processed.
// Response: You need code in your fdintNEXT_CABINET (see below)
// handler to do retries if you get recalled with this
// error. See the sample code (EXTRACT.C) to see how
// this should be handled.
FDIERROR_USER_ABORT, // Description: FDI aborted.
// Cause: An FDI callback returnd -1 (usually).
// Response: Up to client.
} FDIERROR;
/*
* 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
/*** HFDI - Handle to an FDI context
* * FDICreate() creates this, and it must be passed to all other FDI * functions. */typedef void FAR *HFDI; /* hfdi */
/*** FDICABINETINFO - Information about a cabinet
* */typedef struct { long cbCabinet; // Total length of cabinet file
USHORT cFolders; // Count of folders in cabinet
USHORT cFiles; // Count of files in cabinet
USHORT setID; // Cabinet set ID
USHORT iCabinet; // Cabinet number in set (0 based)
BOOL fReserve; // TRUE => RESERVE present in cabinet
BOOL hasprev; // TRUE => Cabinet is chained prev
BOOL hasnext; // TRUE => Cabinet is chained next
} FDICABINETINFO; /* fdici */typedef FDICABINETINFO FAR *PFDICABINETINFO; /* pfdici */
/*** FDIDECRYPTTYPE - PFNFDIDECRYPT command types
* */typedef enum { fdidtNEW_CABINET, // New cabinet
fdidtNEW_FOLDER, // New folder
fdidtDECRYPT, // Decrypt a data block
} FDIDECRYPTTYPE; /* fdidt */
/*** FDIDECRYPT - Data for PFNFDIDECRYPT function
* */typedef struct { FDIDECRYPTTYPE fdidt; // Command type (selects union below)
void FAR *pvUser; // Decryption context
union { struct { // fdidtNEW_CABINET
void FAR *pHeaderReserve; // RESERVE section from CFHEADER
USHORT cbHeaderReserve; // Size of pHeaderReserve
USHORT setID; // Cabinet set ID
int iCabinet; // Cabinet number in set (0 based)
} cabinet;
struct { // fdidtNEW_FOLDER
void FAR *pFolderReserve; // RESERVE section from CFFOLDER
USHORT cbFolderReserve; // Size of pFolderReserve
USHORT iFolder; // Folder number in cabinet (0 based)
} folder;
struct { // fdidtDECRYPT
void FAR *pDataReserve; // RESERVE section from CFDATA
USHORT cbDataReserve; // Size of pDataReserve
void FAR *pbData; // Data buffer
USHORT cbData; // Size of data buffer
BOOL fSplit; // TRUE if this is a split data block
USHORT cbPartial; // 0 if this is not a split block, or
// the first piece of a split block;
// Greater than 0 if this is the
// second piece of a split block.
} decrypt; };} FDIDECRYPT; /* fdid */typedef FDIDECRYPT FAR *PFDIDECRYPT; /* pfdid */
/*** FNALLOC - Memory Allocation
* FNFREE - Memory Free * * These are modeled after the C run-time routines malloc() and free() * FDI 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 * PFNALLOC and PFNFREE calls -- incremental releases of * FDI may have radically different numbers of * PFNALLOC calls and allocation sizes! *///** Memory functions for FDI
typedef void HUGE * (FAR DIAMONDAPI *PFNALLOC)(ULONG cb); /* pfna */#define FNALLOC(fn) void HUGE * FAR DIAMONDAPI fn(ULONG cb)
typedef void (FAR DIAMONDAPI *PFNFREE)(void HUGE *pv); /* pfnf */#define FNFREE(fn) void FAR DIAMONDAPI fn(void HUGE *pv)
/*** PFNOPEN - File I/O callbacks for FDI
* PFNREAD * PFNWRITE * PFNCLOSE * PFNSEEK * * These are modeled after the C run-time routines _open, _read, * _write, _close, and _lseek. The values for the PFNOPEN oflag * and pmode calls are those defined for _open. FDI expects error * handling to be identical to these C run-time routines. * * 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! FDI will usually * stick to opening cabinet files, but it is possible * that in a future implementation it may open temporary * files or open cabinet files in a different order. * * Notes for Memory Mapped File fans: * You can write wrapper routines to allow FDI to work on memory * mapped files. You'll have to create your own "handle" type so that * you can store the base memory address of the file and the current * seek position, and then you'll allocate and fill in one of these * structures and return a pointer to it in response to the PFNOPEN * call and the fdintCOPY_FILE call. Your PFNREAD and PFNWRITE * functions will do memcopy(), and update the seek position in your * "handle" structure. PFNSEEK will just change the seek position * in your "handle" structure. *///** File I/O functions for FDI
typedef int (FAR DIAMONDAPI *PFNOPEN) (CHAR FAR *pszFile, int oflag, int pmode);typedef UINT (FAR DIAMONDAPI *PFNREAD) (int hf, void FAR *pv, UINT cb);typedef UINT (FAR DIAMONDAPI *PFNWRITE)(int hf, void FAR *pv, UINT cb);typedef int (FAR DIAMONDAPI *PFNCLOSE)(int hf);typedef long (FAR DIAMONDAPI *PFNSEEK) (int hf, long dist, int seektype);
#define FNOPEN(fn) int FAR DIAMONDAPI fn(CHAR FAR *pszFile, int oflag, int pmode)
#define FNREAD(fn) UINT FAR DIAMONDAPI fn(int hf, void FAR *pv, UINT cb)
#define FNWRITE(fn) UINT FAR DIAMONDAPI fn(int hf, void FAR *pv, UINT cb)
#define FNCLOSE(fn) int FAR DIAMONDAPI fn(int hf)
#define FNSEEK(fn) long FAR DIAMONDAPI fn(int hf, long dist, int seektype)
/*** PFNFDIDECRYPT - FDI Decryption callback
* * If this function is passed on the FDICopy() call, then FDI calls it * at various times to update the decryption state and to decrypt FCDATA * blocks. * * Common Entry Conditions: * pfdid->fdidt - Command type * pfdid->pvUser - pvUser value from FDICopy() call * * fdidtNEW_CABINET: //** Notification of a new cabinet
* Entry: * pfdid->cabinet. * pHeaderReserve - RESERVE section from CFHEADER * cbHeaderReserve - Size of pHeaderReserve * setID - Cabinet set ID * iCabinet - Cabinet number in set (0 based) * Exit-Success: * returns anything but -1; * Exit-Failure: * returns -1; FDICopy() is aborted. * Notes: * (1) This call allows the decryption code to pick out any information * from the cabinet header reserved area (placed there by DIACRYPT) * needed to perform decryption. If there is no such information, * this call would presumably be ignored. * (2) This call is made very soon after fdintCABINET_INFO. * * fdidtNEW_FOLDER: //** Notification of a new folder
* Entry: * pfdid->folder. * pFolderReserve - RESERVE section from CFFOLDER * cbFolderReserve - Size of pFolderReserve * iFolder - Folder number in cabinet (0 based) * Exit-Success: * returns anything but -1; * Exit-Failure: * returns -1; FDICopy() is aborted. * Notes: * This call allows the decryption code to pick out any information * from the folder reserved area (placed there by DIACRYPT) needed * to perform decryption. If there is no such information, this * call would presumably be ignored. * * fdidtDECRYPT: //** Decrypt a data buffer
* Entry: * pfdid->folder. * pDataReserve - RESERVE section for this CFDATA block * cbDataReserve - Size of pDataReserve * pbData - Data buffer * cbData - Size of data buffer * fSplit - TRUE if this is a split data block * cbPartial - 0 if this is not a split block, or the first * piece of a split block; Greater than 0 if * this is the second piece of a split block. * Exit-Success: * returns TRUE; * Exit-Failure: * returns FALSE; error during decrypt * returns -1; FDICopy() is aborted. * Notes: * FCI will split CFDATA blocks across cabinet boundaries if * necessary. To provide maximum flexibility, FDI will call the * fdidtDECRYPT function twice on such split blocks, once when * the first portion is read, and again when the second portion * is read. And, of course, most data blocks will not be split. * So, there are three cases: * * 1) fSplit == FALSE * You have the entire data block, so decrypt it. * * 2) fSplit == TRUE, cbPartial == 0 * This is the first portion of a split data block, so cbData * is the size of this portion. You can either choose to decrypt * this piece, or ignore this call and decrypt the full CFDATA * block on the next (second) fdidtDECRYPT call. * * 3) fSplit == TRUE, cbPartial > 0 * This is the second portion of a split data block (indeed, * cbPartial will have the same value as cbData did on the * immediately preceeding fdidtDECRYPT call!). If you decrypted * the first portion on the first call, then you can decrypt the * second portion now. If you ignored the first call, then you * can decrypt the entire buffer. * NOTE: pbData points to the second portion of the split data * block in this case, *not* the entire data block. If * you want to wait until the second piece to decrypt the * *entire* block, pbData-cbPartial is the address of the * start of the whole block, and cbData+cbPartial is its * size. */typedef int (FAR DIAMONDAPI *PFNFDIDECRYPT)(PFDIDECRYPT pfdid); /* pfnfdid */#define FNFDIDECRYPT(fn) int FAR DIAMONDAPI fn(PFDIDECRYPT pfdid)
/*** FDINOTIFICATION - Notification structure for PFNFDINOTIFY
* * See the FDINOTIFICATIONTYPE definition for information on usage and * meaning of these fields. */typedef struct {// long fields
long cb; CHAR FAR *psz1; CHAR FAR *psz2; CHAR FAR *psz3; // Points to a 256 character buffer
void FAR *pv; // Value for client
// int fields
int hf;
// short fields
USHORT date; USHORT time; USHORT attribs;
USHORT setID; // Cabinet set ID
USHORT iCabinet; // Cabinet number (0-based)
USHORT iFolder; // Folder number (0-based)
FDIERROR fdie;} FDINOTIFICATION, FAR *PFDINOTIFICATION; /* fdin, pfdin */
/*** FDINOTIFICATIONTYPE - FDICopy notification types
* * The notification function for FDICopy can be called with the following * values for the fdint parameter. In all cases, the pfdin->pv field is * filled in with the value of the pvUser argument passed in to FDICopy(). * * A typical sequence of calls will be something like this: * fdintCABINET_INFO // Info about the cabinet
* fdintENUMERATE // Starting enumeration
* fdintPARTIAL_FILE // Only if this is not the first cabinet, and
* // one or more files were continued from the
* // previous cabinet.
* ... * fdintPARTIAL_FILE * fdintCOPY_FILE // The first file that starts in this cabinet
* ... * fdintCOPY_FILE // Now let's assume you want this file...
* // PFNWRITE called multiple times to write to this file.
* fdintCLOSE_FILE_INFO // File done, set date/time/attributes
* * fdintCOPY_FILE // Now let's assume you want this file...
* // PFNWRITE called multiple times to write to this file.
* fdintNEXT_CABINET // File was continued to next cabinet!
* fdintCABINET_INFO // Info about the new cabinet
* // PFNWRITE called multiple times to write to this file.
* fdintCLOSE_FILE_INFO // File done, set date/time/attributes
* ... * fdintENUMERATE // Ending enumeration
* * fdintCABINET_INFO: * Called exactly once for each cabinet opened by FDICopy(), including * continuation cabinets opened due to file(s) spanning cabinet * boundaries. Primarily intended to permit EXTRACT.EXE to * automatically select the next cabinet in a cabinet sequence even if * not copying files that span cabinet boundaries. * Entry: * pfdin->psz1 = name of next cabinet * pfdin->psz2 = name of next disk * pfdin->psz3 = cabinet path name * pfdin->setID = cabinet set ID (a random 16-bit number) * pfdin->iCabinet = Cabinet number within cabinet set (0-based) * Exit-Success: * Return anything but -1 * Exit-Failure: * Returns -1 => Abort FDICopy() call * Notes: * This call is made *every* time a new cabinet is examined by * FDICopy(). So if "foo2.cab" is examined because a file is * continued from "foo1.cab", and then you call FDICopy() again * on "foo2.cab", you will get *two* fdintCABINET_INFO calls all * told. * * fdintCOPY_FILE: * Called for each file that *starts* in the current cabinet, giving * the client the opportunity to request that the file be copied or * skipped. * Entry: * pfdin->psz1 = file name in cabinet * pfdin->cb = uncompressed size of file * pfdin->date = file date * pfdin->time = file time * pfdin->attribs = file attributes * pfdin->iFolder = file's folder index * Exit-Success: * Return non-zero file handle for destination file; FDI writes * data to this file use the PFNWRITE function supplied to FDICreate, * and then calls fdintCLOSE_FILE_INFO to close the file and set * the date, time, and attributes. NOTE: This file handle returned * must also be closeable by the PFNCLOSE function supplied to * FDICreate, since if an error occurs while writing to this handle, * FDI will use the PFNCLOSE function to close the file so that the * client may delete it. * Exit-Failure: * Returns 0 => Skip file, do not copy * Returns -1 => Abort FDICopy() call * * fdintCLOSE_FILE_INFO: * Called after all of the data has been written to a target file. * This function must close the file and set the file date, time, * and attributes. * Entry: * pfdin->psz1 = file name in cabinet * pfdin->hf = file handle * pfdin->date = file date * pfdin->time = file time * pfdin->attribs = file attributes * pfdin->iFolder = file's folder index * pfdin->cb = Run After Extract (0 - don't run, 1 Run) * Exit-Success: * Returns TRUE * Exit-Failure: * Returns FALSE, or -1 to abort; * * IMPORTANT NOTE IMPORTANT: * pfdin->cb is overloaded to no longer be the size of * the file but to be a binary indicated run or not * * IMPORTANT NOTE: * FDI assumes that the target file was closed, even if this * callback returns failure. FDI will NOT attempt to use * the PFNCLOSE function supplied on FDICreate() to close * the file! * * fdintPARTIAL_FILE: * Called for files at the front of the cabinet that are CONTINUED * from a previous cabinet. This callback occurs only when FDICopy is * started on second or subsequent cabinet in a series that has files * continued from a previous cabinet. * Entry: * pfdin->psz1 = file name of file CONTINUED from a PREVIOUS cabinet * pfdin->psz2 = name of cabinet where file starts * pfdin->psz3 = name of disk where file starts * Exit-Success: * Return anything other than -1; enumeration continues * Exit-Failure: * Returns -1 => Abort FDICopy() call * * fdintENUMERATE: * Called once after a call to FDICopy() starts scanning a CAB's * CFFILE entries, and again when there are no more CFFILE entries. * If CAB spanning occurs, an additional call will occur after the * first spanned file is completed. If the pfdin->iFolder value is * changed from zero, additional calls will occur next time it reaches * zero. If iFolder is changed to zero, FDICopy will terminate, as if * there were no more CFFILE entries. Primarily intended to allow an * application with it's own file list to help FDI advance quickly to * a CFFILE entry of interest. Can also be used to allow an * application to determine the cb values for each file in the CAB. * Entry: * pfdin->cb = current CFFILE position * pfdin->iFolder = number of files remaining * pfdin->setID = current CAB's setID value * Exit-Don't Care: * Don't change anything. * Return anything but -1. * Exit-Forcing a skip: * pfdin->cb = desired CFFILE position * pfdin->iFolder = desired # of files remaining * Return anything but -1. * Exit-Stop: * pfdin->iFolder = set to 0 * Return anything but -1. * Exit-Failure: * Return -1 => Abort FDICopy call ("user aborted".) * Notes: * This call can be ignored by applications which want normal file * searching. The application can adjust the supplied values to * force FDICopy() to continue it's search at another location, or * to force FDICopy() to terminate the search, by setting iFolder to 0. * (FDICopy() will report no error when terminated this way.) * FDI has no means to verify the supplied cb or iFolder values. * Arbitrary values are likely to cause undesirable results. An * application should cross-check pfdin->setID to be certain the * external database is in sync with the CAB. Reverse-skips are OK * (but may be inefficient) unless fdintNEXT_CABINET has been called. * * fdintNEXT_CABINET: * This function is *only* called when fdintCOPY_FILE was told to copy * a file in the current cabinet that is continued to a subsequent * cabinet file. It is important that the cabinet path name (psz3) * be validated before returning! This function should ensure that * the cabinet exists and is readable before returning. So, this * is the function that should, for example, issue a disk change * prompt and make sure the cabinet file exists. * * When this function returns to FDI, FDI will check that the setID * and iCabinet match the expected values for the next cabinet. * If not, FDI will continue to call this function until the correct * cabinet file is specified, or until this function returns -1 to * abort the FDICopy() function. pfdin->fdie is set to * FDIERROR_WRONG_CABINET to indicate this case. * * If you *haven't* ensured that the cabinet file is present and * readable, or the cabinet file has been damaged, pfdin->fdie will * receive other appropriate error codes: * * FDIERROR_CABINET_NOT_FOUND * FDIERROR_NOT_A_CABINET * FDIERROR_UNKNOWN_CABINET_VERSION * FDIERROR_CORRUPT_CABINET * FDIERROR_BAD_COMPR_TYPE * FDIERROR_RESERVE_MISMATCH * FDIERROR_WRONG_CABINET * * Entry: * pfdin->psz1 = name of next cabinet where current file is continued * pfdin->psz2 = name of next disk where current file is continued * pfdin->psz3 = cabinet path name; FDI concatenates psz3 with psz1 * to produce the fully-qualified path for the cabinet * file. The 256-byte buffer pointed at by psz3 may * be modified, but psz1 may not! * pfdin->fdie = FDIERROR_WRONG_CABINET if the previous call to * fdintNEXT_CABINET specified a cabinet file that * did not match the setID/iCabinet that was expected. * Exit-Success: * Return anything but -1 * Exit-Failure: * Returns -1 => Abort FDICopy() call * Notes: * This call is almost always made when a target file is open and * being written to, and the next cabinet is needed to get more * data for the file. */typedef enum { fdintCABINET_INFO, // General information about cabinet
fdintPARTIAL_FILE, // First file in cabinet is continuation
fdintCOPY_FILE, // File to be copied
fdintCLOSE_FILE_INFO, // close the file, set relevant info
fdintNEXT_CABINET, // File continued to next cabinet
fdintENUMERATE, // Enumeration status
} FDINOTIFICATIONTYPE; /* fdint */
typedef int (FAR DIAMONDAPI *PFNFDINOTIFY)(FDINOTIFICATIONTYPE fdint, PFDINOTIFICATION pfdin); /* pfnfdin */
#define FNFDINOTIFY(fn) int FAR DIAMONDAPI fn(FDINOTIFICATIONTYPE fdint, \
PFDINOTIFICATION pfdin)
/*** cpuType values for FDICreate()
* * (Ignored by 32-bit FDI.) */#define cpuUNKNOWN (-1) /* FDI does detection */
#define cpu80286 (0) /* '286 opcodes only */
#define cpu80386 (1) /* '386 opcodes used */
/*** FDICreate - Create an FDI context
* * Entry: * pfnalloc * pfnfree * pfnopen * pfnread * pfnwrite * pfnclose * pfnlseek * cpuType - Select CPU type (auto-detect, 286, or 386+) * NOTE: For the 32-bit FDI.LIB, this parameter is ignored! * perf * * Exit-Success: * Returns non-NULL FDI context handle. * * Exit-Failure: * Returns NULL; perf filled in with error code * */HFDI FAR DIAMONDAPI FDICreate(PFNALLOC pfnalloc, PFNFREE pfnfree, PFNOPEN pfnopen, PFNREAD pfnread, PFNWRITE pfnwrite, PFNCLOSE pfnclose, PFNSEEK pfnseek, int cpuType, PERF perf);
/*** FDIIsCabinet - Determines if file is a cabinet, returns info if it is
* * Entry: * hfdi - Handle to FDI context (created by FDICreate()) * hf - File handle suitable for PFNREAD/PFNSEEK, positioned * at offset 0 in the file to test. * pfdici - Buffer to receive info about cabinet if it is one. * * Exit-Success: * Returns TRUE; file is a cabinet, pfdici filled in. * * Exit-Failure: * Returns FALSE, file is not a cabinet; If an error occurred, * perf (passed on FDICreate call!) filled in with error. */BOOL FAR DIAMONDAPI FDIIsCabinet(HFDI hfdi, int hf, PFDICABINETINFO pfdici);
/*** FDICopy - extracts files from a cabinet
* * Entry: * hfdi - handle to FDI context (created by FDICreate()) * pszCabinet - main name of cabinet file * pszCabPath - Path to cabinet file(s) * flags - Flags to modify behavior * pfnfdin - Notification function * pfnfdid - Decryption function (pass NULL if not used) * pvUser - User specified value to pass to notification function * * Exit-Success: * Returns TRUE; * * Exit-Failure: * Returns FALSE, perf (passed on FDICreate call!) filled in with * error. * * Notes: * (1) If FDICopy() fails while a target file is being written out, then * FDI will use the PFNCLOSE function to close the file handle for that * target file that was returned from the fdintCOPY_FILE notification. * The client application is then free to delete the target file, since * it will not be in a valid state (since there was an error while * writing it out). */BOOL FAR DIAMONDAPI FDICopy(HFDI hfdi, CHAR FAR *pszCabinet, CHAR FAR *pszCabPath, int flags, PFNFDINOTIFY pfnfdin, PFNFDIDECRYPT pfnfdid, void FAR *pvUser);
/*** FDIDestroy - Destroy an FDI context
* * Entry: * hfdi - handle to FDI context (created by FDICreate()) * * Exit-Success: * Returns TRUE; * * Exit-Failure: * Returns FALSE; */BOOL FAR DIAMONDAPI FDIDestroy(HFDI hfdi);
//** Revert to default structure packing
#pragma pack()
#endif // !INCLUDED_FDI
#ifdef __cplusplus
}#endif
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