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/* This file is part of libmspack.
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* (C) 2003-2004 Stuart Caie.
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* libmspack is free software; you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License (LGPL) version 2.1
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* For further details, see the file COPYING.LIB distributed with libmspack
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#define MSPACK_CAB_H 1
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/* generic CAB definitions */
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/* structure offsets */
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#define cfhead_Signature (0x00)
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#define cfhead_CabinetSize (0x08)
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#define cfhead_FileOffset (0x10)
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#define cfhead_MinorVersion (0x18)
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#define cfhead_MajorVersion (0x19)
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#define cfhead_NumFolders (0x1A)
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#define cfhead_NumFiles (0x1C)
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#define cfhead_Flags (0x1E)
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#define cfhead_SetID (0x20)
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#define cfhead_CabinetIndex (0x22)
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#define cfhead_SIZEOF (0x24)
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#define cfheadext_HeaderReserved (0x00)
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#define cfheadext_FolderReserved (0x02)
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#define cfheadext_DataReserved (0x03)
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#define cfheadext_SIZEOF (0x04)
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#define cffold_DataOffset (0x00)
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#define cffold_NumBlocks (0x04)
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#define cffold_CompType (0x06)
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#define cffold_SIZEOF (0x08)
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#define cffile_UncompressedSize (0x00)
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#define cffile_FolderOffset (0x04)
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#define cffile_FolderIndex (0x08)
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#define cffile_Date (0x0A)
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#define cffile_Time (0x0C)
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#define cffile_Attribs (0x0E)
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#define cffile_SIZEOF (0x10)
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#define cfdata_CheckSum (0x00)
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#define cfdata_CompressedSize (0x04)
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#define cfdata_UncompressedSize (0x06)
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#define cfdata_SIZEOF (0x08)
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#define cffoldCOMPTYPE_MASK (0x000f)
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#define cffoldCOMPTYPE_NONE (0x0000)
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#define cffoldCOMPTYPE_MSZIP (0x0001)
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#define cffoldCOMPTYPE_QUANTUM (0x0002)
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#define cffoldCOMPTYPE_LZX (0x0003)
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#define cfheadPREV_CABINET (0x0001)
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#define cfheadNEXT_CABINET (0x0002)
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#define cfheadRESERVE_PRESENT (0x0004)
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#define cffileCONTINUED_FROM_PREV (0xFFFD)
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#define cffileCONTINUED_TO_NEXT (0xFFFE)
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#define cffileCONTINUED_PREV_AND_NEXT (0xFFFF)
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/* CAB data blocks are <= 32768 bytes in uncompressed form. Uncompressed
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* blocks have zero growth. MSZIP guarantees that it won't grow above
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* uncompressed size by more than 12 bytes. LZX guarantees it won't grow
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* more than 6144 bytes. Quantum has no documentation, but the largest
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* block seen in the wild is 337 bytes above uncompressed size.
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#define CAB_BLOCKMAX (32768)
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#define CAB_INPUTMAX (CAB_BLOCKMAX+6144)
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/* CAB compression definitions */
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struct mscab_compressor_p {
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struct mscab_compressor base;
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struct mspack_system *system;
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/* CAB decompression definitions */
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struct mscabd_decompress_state {
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struct mscabd_folder_p *folder; /* current folder we're extracting from */
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struct mscabd_folder_data *data; /* current folder split we're in */
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unsigned int offset; /* uncompressed offset within folder */
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unsigned int block; /* which block are we decompressing? */
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struct mspack_system sys; /* special I/O code for decompressor */
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int comp_type; /* type of compression used by folder */
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int (*decompress)(void *, off_t); /* decompressor code */
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void *state; /* decompressor state */
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struct mscabd_cabinet_p *incab; /* cabinet where input data comes from */
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struct mspack_file *infh; /* input file handle */
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struct mspack_file *outfh; /* output file handle */
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unsigned char *i_ptr, *i_end; /* input data consumed, end */
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unsigned char input[CAB_INPUTMAX]; /* one input block of data */
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struct mscab_decompressor_p {
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struct mscab_decompressor base;
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struct mscabd_decompress_state *d;
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struct mspack_system *system;
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int param[3]; /* !!! MATCH THIS TO NUM OF PARAMS IN MSPACK.H !!! */
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struct mscabd_cabinet_p {
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struct mscabd_cabinet base;
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off_t blocks_off; /* offset to data blocks */
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int block_resv; /* reserved space in data blocks */
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/* there is one of these for every cabinet a folder spans */
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struct mscabd_folder_data {
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struct mscabd_folder_data *next;
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struct mscabd_cabinet_p *cab; /* cabinet file of this folder span */
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off_t offset; /* cabinet offset of first datablock */
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struct mscabd_folder_p {
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struct mscabd_folder base;
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struct mscabd_folder_data data; /* where are the data blocks? */
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struct mscabd_file *merge_prev; /* do we need to merge backwards? */
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struct mscabd_file *merge_next; /* do we need to merge forwards? */
added
removed
libclamav/mspack/cab.h
