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1068 lines
46 KiB
1068 lines
46 KiB
/*
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* FDI.H -- File Decompression Interface
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*
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* Copyright (C) Microsoft Corporation 1993-1997
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* All Rights Reserved.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef INCLUDED_TYPES_FCI_FDI
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#define INCLUDED_TYPES_FCI_FDI 1
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#ifndef HUGE
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#define HUGE
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#endif
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#ifndef FAR
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#define FAR
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#endif
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#ifndef DIAMONDAPI
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#define DIAMONDAPI __cdecl
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#endif
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//** Specify structure packing explicitly for clients of FDI
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#pragma pack(4)
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//** Don't redefine types defined in Win16 WINDOWS.H (_INC_WINDOWS)
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// or Win32 WINDOWS.H (_WINDOWS_)
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//
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#if !defined(_INC_WINDOWS) && !defined(_WINDOWS_)
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typedef int BOOL; /* f */
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typedef unsigned char BYTE; /* b */
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typedef unsigned int UINT; /* ui */
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typedef unsigned short USHORT; /* us */
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typedef unsigned long ULONG; /* ul */
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#endif // _INC_WINDOWS
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typedef unsigned long CHECKSUM; /* csum */
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typedef unsigned long UOFF; /* uoff - uncompressed offset */
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typedef unsigned long COFF; /* coff - cabinet file offset */
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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#ifndef NULL
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#define NULL 0
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#endif
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#ifdef _DEBUG
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// don't hide statics from map during debugging
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#define STATIC
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#else // !DEBUG
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#define STATIC static
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#endif // !DEBUG
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#define CB_MAX_CHUNK 32768U
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#define CB_MAX_DISK 0x7ffffffL
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#define CB_MAX_FILENAME 256
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#define CB_MAX_CABINET_NAME 256
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#define CB_MAX_CAB_PATH 256
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#define CB_MAX_DISK_NAME 256
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/*** tcompXXX - Compression types
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*
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* These are passed to FCIAddFile(), and are also stored in the CFFOLDER
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* structures in cabinet files.
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*
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* NOTE: We reserve bits for the TYPE, QUANTUM_LEVEL, and QUANTUM_MEM
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* to provide room for future expansion. Since this value is stored
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* in the CFDATA records in the cabinet file, we don't want to
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* have to change the format for existing compression configurations
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* if we add new ones in the future. This will allows us to read
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* old cabinet files in the future.
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*/
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typedef unsigned short TCOMP; /* tcomp */
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#define tcompMASK_TYPE 0x000F // Mask for compression type
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#define tcompTYPE_NONE 0x0000 // No compression
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#define tcompTYPE_MSZIP 0x0001 // MSZIP
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#define tcompTYPE_QUANTUM 0x0002 // Quantum
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#define tcompTYPE_LZX 0x0003 // LZX
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#define tcompBAD 0x000F // Unspecified compression type
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#define tcompMASK_LZX_WINDOW 0x1F00 // Mask for LZX Compression Memory
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#define tcompLZX_WINDOW_LO 0x0F00 // Lowest LZX Memory (15)
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#define tcompLZX_WINDOW_HI 0x1500 // Highest LZX Memory (21)
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#define tcompSHIFT_LZX_WINDOW 8 // Amount to shift over to get int
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#define tcompMASK_QUANTUM_LEVEL 0x00F0 // Mask for Quantum Compression Level
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#define tcompQUANTUM_LEVEL_LO 0x0010 // Lowest Quantum Level (1)
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#define tcompQUANTUM_LEVEL_HI 0x0070 // Highest Quantum Level (7)
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#define tcompSHIFT_QUANTUM_LEVEL 4 // Amount to shift over to get int
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#define tcompMASK_QUANTUM_MEM 0x1F00 // Mask for Quantum Compression Memory
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#define tcompQUANTUM_MEM_LO 0x0A00 // Lowest Quantum Memory (10)
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#define tcompQUANTUM_MEM_HI 0x1500 // Highest Quantum Memory (21)
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#define tcompSHIFT_QUANTUM_MEM 8 // Amount to shift over to get int
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#define tcompMASK_RESERVED 0xE000 // Reserved bits (high 3 bits)
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#define CompressionTypeFromTCOMP(tc) \
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((tc) & tcompMASK_TYPE)
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#define CompressionLevelFromTCOMP(tc) \
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(((tc) & tcompMASK_QUANTUM_LEVEL) >> tcompSHIFT_QUANTUM_LEVEL)
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#define CompressionMemoryFromTCOMP(tc) \
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(((tc) & tcompMASK_QUANTUM_MEM) >> tcompSHIFT_QUANTUM_MEM)
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#define TCOMPfromTypeLevelMemory(t,l,m) \
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(((m) << tcompSHIFT_QUANTUM_MEM ) | \
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((l) << tcompSHIFT_QUANTUM_LEVEL) | \
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( t ))
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#define LZXCompressionWindowFromTCOMP(tc) \
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(((tc) & tcompMASK_LZX_WINDOW) >> tcompSHIFT_LZX_WINDOW)
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#define TCOMPfromLZXWindow(w) \
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(((w) << tcompSHIFT_LZX_WINDOW ) | \
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( tcompTYPE_LZX ))
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//** Revert to default structure packing
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#pragma pack()
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#endif // !INCLUDED_TYPES_FCI_FDI
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/*
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* Concepts:
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* A *cabinet* file contains one or more *folders*. A folder contains
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* one or more (pieces of) *files*. A folder is by definition a
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* decompression unit, i.e., to extract a file from a folder, all of
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* the data from the start of the folder up through and including the
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* desired file must be read and decompressed.
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*
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* A folder can span one (or more) cabinet boundaries, and by implication
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* a file can also span one (or more) cabinet boundaries. Indeed, more
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* than one file can span a cabinet boundary, since FCI concatenates
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* files together into a single data stream before compressing (actually,
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* at most one file will span any one cabinet boundary, but FCI does
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* not know which file this is, since the mapping from uncompressed bytes
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* to compressed bytes is pretty obscure. Also, since FCI compresses
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* in blocks of 32K (at present), any files with data in a 32K block that
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* spans a cabinet boundary require FDI to read both cabinet files
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* to get the two halves of the compressed block).
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*
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* Overview:
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* The File Decompression Interface is used to simplify the reading of
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* cabinet files. A setup program will proceed in a manner very
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* similar to the pseudo code below. An FDI context is created, the
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* setup program calls FDICopy() for each cabinet to be processed. For
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* each file in the cabinet, FDICopy() calls a notification callback
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* routine, asking the setup program if the file should be copied.
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* This call-back approach is great because it allows the cabinet file
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* to be read and decompressed in an optimal manner, and also makes FDI
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* independent of the run-time environment -- FDI makes *no* C run-time
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* calls whatsoever. All memory allocation and file I/O functions are
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* passed into FDI by the client.
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*
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* main(...)
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* {
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* // Read INF file to construct list of desired files.
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* // Ideally, these would be sorted in the same order as the
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* // files appear in the cabinets, so that you can just walk
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* // down the list in response to fdintCOPY_FILE notifications.
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*
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* // Construct list of required cabinets.
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*
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* hfdi = FDICreate(...); // Create FDI context
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* For (cabinet in List of Cabinets) {
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* FDICopy(hfdi,cabinet,fdiNotify,...); // Process each cabinet
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* }
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* FDIDestroy(hfdi);
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* ...
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* }
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*
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* // Notification callback function
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* fdiNotify(fdint,...)
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* {
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* If (User Aborted) // Permit cancellation
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* if (fdint == fdintCLOSE_FILE_INFO)
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* close open file
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* return -1;
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* switch (fdint) {
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* case fdintCOPY_FILE: // File to copy, maybe
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* // Check file against list of desired files
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* if want to copy file
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* open destination file and return handle
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* else
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* return NULL; // Skip file
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* case fdintCLOSE_FILE_INFO:
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* close file
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* set date, time, and attributes
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*
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* case fdintNEXT_CABINET:
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* if not an error callback
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* Tell FDI to use suggested directory name
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* else
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* Tell user what the problem was, and prompt
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* for a new disk and/or path.
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* if user aborts
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* Tell FDI to abort
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* else
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* return to FDI to try another cabinet
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*
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* default:
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* return 0; // more messages may be defined
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* ...
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* }
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*
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* Error Handling Suggestions:
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* Since you the client have passed in *all* of the functions that
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* FDI uses to interact with the "outside" world, you are in prime
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* position to understand and deal with errors.
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*
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* The general philosophy of FDI is to pass all errors back up to
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* the client. FDI returns fairly generic error codes in the case
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* where one of the callback functions (PFNOPEN, PFNREAD, etc.) fail,
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* since it assumes that the callback function will save enough
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* information in a static/global so that when FDICopy() returns
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* fail, the client can examine this information and report enough
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* detail about the problem that the user can take corrective action.
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*
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* For very specific errors (CORRUPT_CABINET, for example), FDI returns
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* very specific error codes.
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*
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* THE BEST POLICY IS FOR YOUR CALLBACK ROUTINES TO AVOID RETURNING
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* ERRORS TO FDI!
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*
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* Examples:
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* (1) If the disk is getting full, instead of returning an error
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* from your PFNWRITE function, you should -- inside your
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* PFNWRITE function -- put up a dialog telling the user to free
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* some disk space.
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* (2) When you get the fdintNEXT_CABINET notification, you should
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* verify that the cabinet you return is the correct one (call
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* FDIIsCabinet(), and make sure the setID matches the one for
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* the current cabinet specified in the fdintCABINET_INFO, and
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* that the disk number is one greater.
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*
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* NOTE: FDI will continue to call fdintNEXT_CABINET until it
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* gets the cabinet it wants, or until you return -1
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* to abort the FDICopy() call.
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*
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* The documentation below on the FDI error codes provides explicit
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* guidance on how to avoid each error.
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*
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* If you find you must return a failure to FDI from one of your
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* callback functions, then FDICopy() frees all resources it allocated
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* and closes all files. If you can figure out how to overcome the
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* problem, you can call FDICopy() again on the last cabinet, and
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* skip any files that you already copied. But, note that FDI does
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* *not* maintain any state between FDICopy() calls, other than possibly
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* memory allocated for the decompressor.
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*
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* See FDIERROR for details on FDI error codes and recommended actions.
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*
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*
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* Progress Indicator Suggestions:
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* As above, all of the file I/O functions are supplied by you. So,
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* updating a progress indicator is very simple. You keep track of
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* the target files handles you have opened, along with the uncompressed
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* size of the target file. When you see writes to the handle of a
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* target file, you use the write count to update your status!
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* Since this method is available, there is no separate callback from
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* FDI just for progess indication.
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*/
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#ifndef INCLUDED_FDI
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#define INCLUDED_FDI 1
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//** Specify structure packing explicitly for clients of FDI
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#pragma pack(4)
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/*** FDIERROR - Error codes returned in erf.erfOper field
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*
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* In general, FDI will only fail if one of the passed in memory or
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* file I/O functions fails. Other errors are pretty unlikely, and are
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* caused by corrupted cabinet files, passing in a file which is not a
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* cabinet file, or cabinet files out of order.
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*
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* Description: Summary of error.
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* Cause: List of possible causes of this error.
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* Response: How client might respond to this error, or avoid it in
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* the first place.
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*/
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typedef enum {
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FDIERROR_NONE,
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// Description: No error
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// Cause: Function was successfull.
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// Response: Keep going!
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FDIERROR_CABINET_NOT_FOUND,
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// Description: Cabinet not found
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// Cause: Bad file name or path passed to FDICopy(), or returned
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// to fdintNEXT_CABINET.
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// Response: To prevent this error, validate the existence of the
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// the cabinet *before* passing the path to FDI.
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FDIERROR_NOT_A_CABINET,
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// Description: Cabinet file does not have the correct format
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// Cause: File passed to to FDICopy(), or returned to
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// fdintNEXT_CABINET, is too small to be a cabinet file,
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// or does not have the cabinet signature in its first
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// four bytes.
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// Response: To prevent this error, call FDIIsCabinet() to check a
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// cabinet before calling FDICopy() or returning the
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// cabinet path to fdintNEXT_CABINET.
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FDIERROR_UNKNOWN_CABINET_VERSION,
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// Description: Cabinet file has an unknown version number.
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// Cause: File passed to to FDICopy(), or returned to
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// fdintNEXT_CABINET, has what looks like a cabinet file
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// header, but the version of the cabinet file format
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// is not one understood by this version of FDI. The
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// erf.erfType field is filled in with the version number
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// found in the cabinet file.
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// Response: To prevent this error, call FDIIsCabinet() to check a
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// cabinet before calling FDICopy() or returning the
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// cabinet path to fdintNEXT_CABINET.
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FDIERROR_CORRUPT_CABINET,
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// Description: Cabinet file is corrupt
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// Cause: FDI returns this error any time it finds a problem
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// with the logical format of a cabinet file, and any
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// time one of the passed-in file I/O calls fails when
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// operating on a cabinet (PFNOPEN, PFNSEEK, PFNREAD,
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// or PFNCLOSE). The client can distinguish these two
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// cases based upon whether the last file I/O call
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// failed or not.
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// Response: Assuming this is not a real corruption problem in
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// a cabinet file, the file I/O functions could attempt
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// to do retries on failure (for example, if there is a
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// temporary network connection problem). If this does
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// not work, and the file I/O call has to fail, then the
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// FDI client will have to clean up and call the
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// FDICopy() function again.
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FDIERROR_ALLOC_FAIL,
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// Description: Could not allocate enough memory
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// Cause: FDI tried to allocate memory with the PFNALLOC
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// function, but it failed.
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// Response: If possible, PFNALLOC should take whatever steps
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// are possible to allocate the memory requested. If
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// memory is not immediately available, it might post a
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// dialog asking the user to free memory, for example.
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// Note that the bulk of FDI's memory allocations are
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// made at FDICreate() time and when the first cabinet
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// file is opened during FDICopy().
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FDIERROR_BAD_COMPR_TYPE,
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// Description: Unknown compression type in a cabinet folder
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// Cause: [Should never happen.] A folder in a cabinet has an
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// unknown compression type. This is probably caused by
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// a mismatch between the version of FCI.LIB used to
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// create the cabinet and the FDI.LIB used to read the
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// cabinet.
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// Response: Abort.
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FDIERROR_MDI_FAIL,
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// Description: Failure decompressing data from a cabinet file
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// Cause: The decompressor found an error in the data coming
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// from the file cabinet. The cabinet file was corrupted.
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// [11-Apr-1994 bens When checksuming is turned on, this
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// error should never occur.]
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// Response: Probably should abort; only other choice is to cleanup
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// and call FDICopy() again, and hope there was some
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// intermittent data error that will not reoccur.
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FDIERROR_TARGET_FILE,
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// Description: Failure writing to target file
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// Cause: FDI returns this error any time it gets an error back
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// from one of the passed-in file I/O calls fails when
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// writing to a file being extracted from a cabinet.
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// Response: To avoid or minimize this error, the file I/O functions
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// could attempt to avoid failing. A common cause might
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// be disk full -- in this case, the PFNWRITE function
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// could have a check for free space, and put up a dialog
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// asking the user to free some disk space.
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FDIERROR_RESERVE_MISMATCH,
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// Description: Cabinets in a set do not have the same RESERVE sizes
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// Cause: [Should never happen]. FDI requires that the sizes of
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// the per-cabinet, per-folder, and per-data block
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// RESERVE sections be consistent across all the cabinets
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// in a set.
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// Response: Abort.
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FDIERROR_WRONG_CABINET,
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// Description: Cabinet returned on fdintNEXT_CABINET is incorrect
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// Cause: NOTE: THIS ERROR IS NEVER RETURNED BY FDICopy()!
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// Rather, FDICopy() keeps calling the fdintNEXT_CABINET
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// callback until either the correct cabinet is specified,
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// or you return ABORT.
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// When FDICopy() is extracting a file that crosses a
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// cabinet boundary, it calls fdintNEXT_CABINET to ask
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// for the path to the next cabinet. Not being very
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// trusting, FDI then checks to make sure that the
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// correct continuation cabinet was supplied! It does
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// this by checking the "setID" and "iCabinet" fields
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// in the cabinet. When MAKECAB.EXE creates a set of
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// cabinets, it constructs the "setID" using the sum
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// of the bytes of all the destination file names in
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// the cabinet set. FDI makes sure that the 16-bit
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// setID of the continuation cabinet matches the
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// cabinet file just processed. FDI then checks that
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// the cabinet number (iCabinet) is one more than the
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// cabinet number for the cabinet just processed.
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// Response: You need code in your fdintNEXT_CABINET (see below)
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// handler to do retries if you get recalled with this
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// error. See the sample code (EXTRACT.C) to see how
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// this should be handled.
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FDIERROR_USER_ABORT,
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// Description: FDI aborted.
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// Cause: An FDI callback returnd -1 (usually).
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// Response: Up to client.
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} FDIERROR;
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/*** ERF - Error structure
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*
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* This structure returns error information from FCI/FDI. The caller should
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* not modify this structure.
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*/
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typedef struct {
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FDIERROR erfOper; // FCI/FDI error code -- see FDIERROR_XXX
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// and FCIERR_XXX equates for details.
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int erfType; // Optional error value filled in by FCI/FDI.
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// For FCI, this is usually the C run-time
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// *errno* value.
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BOOL fError; // TRUE => error present
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} ERF; /* erf */
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typedef ERF FAR *PERF; /* perf */
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/*
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* FAT file attribute flag used by FCI/FDI to indicate that
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* the filename in the CAB is a UTF string
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*/
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#ifndef _A_NAME_IS_UTF
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#define _A_NAME_IS_UTF 0x80
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#endif
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/*
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* FAT file attribute flag used by FCI/FDI to indicate that
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* the file should be executed after extraction
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*/
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#ifndef _A_EXEC
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#define _A_EXEC 0x40
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#endif
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/*** HFDI - Handle to an FDI context
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*
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* FDICreate() creates this, and it must be passed to all other FDI
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* functions.
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*/
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typedef void FAR *HFDI; /* hfdi */
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/*** FDICABINETINFO - Information about a cabinet
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|
*
|
|
*/
|
|
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
|