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diff --git a/utils/rbutilqt/mspack/cab.h b/utils/rbutilqt/mspack/cab.h
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+/* This file is part of libmspack.
+ * (C) 2003-2018 Stuart Caie.
+ *
+ * libmspack is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License (LGPL) version 2.1
+ *
+ * For further details, see the file COPYING.LIB distributed with libmspack
+ */
+
+#ifndef MSPACK_CAB_H
+#define MSPACK_CAB_H 1
+
+/* generic CAB definitions */
+
+/* structure offsets */
+#define cfhead_Signature (0x00)
+#define cfhead_CabinetSize (0x08)
+#define cfhead_FileOffset (0x10)
+#define cfhead_MinorVersion (0x18)
+#define cfhead_MajorVersion (0x19)
+#define cfhead_NumFolders (0x1A)
+#define cfhead_NumFiles (0x1C)
+#define cfhead_Flags (0x1E)
+#define cfhead_SetID (0x20)
+#define cfhead_CabinetIndex (0x22)
+#define cfhead_SIZEOF (0x24)
+#define cfheadext_HeaderReserved (0x00)
+#define cfheadext_FolderReserved (0x02)
+#define cfheadext_DataReserved (0x03)
+#define cfheadext_SIZEOF (0x04)
+#define cffold_DataOffset (0x00)
+#define cffold_NumBlocks (0x04)
+#define cffold_CompType (0x06)
+#define cffold_SIZEOF (0x08)
+#define cffile_UncompressedSize (0x00)
+#define cffile_FolderOffset (0x04)
+#define cffile_FolderIndex (0x08)
+#define cffile_Date (0x0A)
+#define cffile_Time (0x0C)
+#define cffile_Attribs (0x0E)
+#define cffile_SIZEOF (0x10)
+#define cfdata_CheckSum (0x00)
+#define cfdata_CompressedSize (0x04)
+#define cfdata_UncompressedSize (0x06)
+#define cfdata_SIZEOF (0x08)
+
+/* flags */
+#define cffoldCOMPTYPE_MASK (0x000f)
+#define cffoldCOMPTYPE_NONE (0x0000)
+#define cffoldCOMPTYPE_MSZIP (0x0001)
+#define cffoldCOMPTYPE_QUANTUM (0x0002)
+#define cffoldCOMPTYPE_LZX (0x0003)
+#define cfheadPREV_CABINET (0x0001)
+#define cfheadNEXT_CABINET (0x0002)
+#define cfheadRESERVE_PRESENT (0x0004)
+#define cffileCONTINUED_FROM_PREV (0xFFFD)
+#define cffileCONTINUED_TO_NEXT (0xFFFE)
+#define cffileCONTINUED_PREV_AND_NEXT (0xFFFF)
+
+/* CAB data blocks are <= 32768 bytes in uncompressed form. Uncompressed
+ * blocks have zero growth. MSZIP guarantees that it won't grow above
+ * uncompressed size by more than 12 bytes. LZX guarantees it won't grow
+ * more than 6144 bytes. Quantum has no documentation, but the largest
+ * block seen in the wild is 337 bytes above uncompressed size.
+ */
+#define CAB_BLOCKMAX (32768)
+#define CAB_INPUTMAX (CAB_BLOCKMAX+6144)
+
+/* input buffer needs to be CAB_INPUTMAX + 1 byte to allow for max-sized block
+ * plus 1 trailer byte added by cabd_sys_read_block() for Quantum alignment.
+ *
+ * When MSCABD_PARAM_SALVAGE is set, block size is not checked so can be
+ * up to 65535 bytes, so max input buffer size needed is 65535 + 1
+ */
+#define CAB_INPUTMAX_SALVAGE (65535)
+#define CAB_INPUTBUF (CAB_INPUTMAX_SALVAGE + 1)
+
+/* There are no more than 65535 data blocks per folder, so a folder cannot
+ * be more than 32768*65535 bytes in length. As files cannot span more than
+ * one folder, this is also their max offset, length and offset+length limit.
+ */
+#define CAB_FOLDERMAX (65535)
+#define CAB_LENGTHMAX (CAB_BLOCKMAX * CAB_FOLDERMAX)
+
+/* CAB compression definitions */
+
+struct mscab_compressor_p {
+ struct mscab_compressor base;
+ struct mspack_system *system;
+ /* todo */
+};
+
+/* CAB decompression definitions */
+
+struct mscabd_decompress_state {
+ struct mscabd_folder_p *folder; /* current folder we're extracting from */
+ struct mscabd_folder_data *data; /* current folder split we're in */
+ unsigned int offset; /* uncompressed offset within folder */
+ unsigned int block; /* which block are we decompressing? */
+ off_t outlen; /* cumulative sum of block output sizes */
+ struct mspack_system sys; /* special I/O code for decompressor */
+ int comp_type; /* type of compression used by folder */
+ int (*decompress)(void *, off_t); /* decompressor code */
+ void *state; /* decompressor state */
+ struct mscabd_cabinet_p *incab; /* cabinet where input data comes from */
+ struct mspack_file *infh; /* input file handle */
+ struct mspack_file *outfh; /* output file handle */
+ unsigned char *i_ptr, *i_end; /* input data consumed, end */
+ unsigned char input[CAB_INPUTBUF]; /* one input block of data */
+};
+
+struct mscab_decompressor_p {
+ struct mscab_decompressor base;
+ struct mscabd_decompress_state *d;
+ struct mspack_system *system;
+ int buf_size, searchbuf_size, fix_mszip, salvage; /* params */
+ int error, read_error;
+};
+
+struct mscabd_cabinet_p {
+ struct mscabd_cabinet base;
+ off_t blocks_off; /* offset to data blocks */
+ int block_resv; /* reserved space in data blocks */
+};
+
+/* there is one of these for every cabinet a folder spans */
+struct mscabd_folder_data {
+ struct mscabd_folder_data *next;
+ struct mscabd_cabinet_p *cab; /* cabinet file of this folder span */
+ off_t offset; /* cabinet offset of first datablock */
+};
+
+struct mscabd_folder_p {
+ struct mscabd_folder base;
+ struct mscabd_folder_data data; /* where are the data blocks? */
+ struct mscabd_file *merge_prev; /* first file needing backwards merge */
+ struct mscabd_file *merge_next; /* first file needing forwards merge */
+};
+
+#endif