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Diffstat (limited to 'utils/rbutilqt/mspack/cab.h')
-rw-r--r-- | utils/rbutilqt/mspack/cab.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/utils/rbutilqt/mspack/cab.h b/utils/rbutilqt/mspack/cab.h new file mode 100644 index 0000000000..79d9951252 --- /dev/null +++ b/utils/rbutilqt/mspack/cab.h | |||
@@ -0,0 +1,140 @@ | |||
1 | /* This file is part of libmspack. | ||
2 | * (C) 2003-2018 Stuart Caie. | ||
3 | * | ||
4 | * libmspack is free software; you can redistribute it and/or modify it under | ||
5 | * the terms of the GNU Lesser General Public License (LGPL) version 2.1 | ||
6 | * | ||
7 | * For further details, see the file COPYING.LIB distributed with libmspack | ||
8 | */ | ||
9 | |||
10 | #ifndef MSPACK_CAB_H | ||
11 | #define MSPACK_CAB_H 1 | ||
12 | |||
13 | /* generic CAB definitions */ | ||
14 | |||
15 | /* structure offsets */ | ||
16 | #define cfhead_Signature (0x00) | ||
17 | #define cfhead_CabinetSize (0x08) | ||
18 | #define cfhead_FileOffset (0x10) | ||
19 | #define cfhead_MinorVersion (0x18) | ||
20 | #define cfhead_MajorVersion (0x19) | ||
21 | #define cfhead_NumFolders (0x1A) | ||
22 | #define cfhead_NumFiles (0x1C) | ||
23 | #define cfhead_Flags (0x1E) | ||
24 | #define cfhead_SetID (0x20) | ||
25 | #define cfhead_CabinetIndex (0x22) | ||
26 | #define cfhead_SIZEOF (0x24) | ||
27 | #define cfheadext_HeaderReserved (0x00) | ||
28 | #define cfheadext_FolderReserved (0x02) | ||
29 | #define cfheadext_DataReserved (0x03) | ||
30 | #define cfheadext_SIZEOF (0x04) | ||
31 | #define cffold_DataOffset (0x00) | ||
32 | #define cffold_NumBlocks (0x04) | ||
33 | #define cffold_CompType (0x06) | ||
34 | #define cffold_SIZEOF (0x08) | ||
35 | #define cffile_UncompressedSize (0x00) | ||
36 | #define cffile_FolderOffset (0x04) | ||
37 | #define cffile_FolderIndex (0x08) | ||
38 | #define cffile_Date (0x0A) | ||
39 | #define cffile_Time (0x0C) | ||
40 | #define cffile_Attribs (0x0E) | ||
41 | #define cffile_SIZEOF (0x10) | ||
42 | #define cfdata_CheckSum (0x00) | ||
43 | #define cfdata_CompressedSize (0x04) | ||
44 | #define cfdata_UncompressedSize (0x06) | ||
45 | #define cfdata_SIZEOF (0x08) | ||
46 | |||
47 | /* flags */ | ||
48 | #define cffoldCOMPTYPE_MASK (0x000f) | ||
49 | #define cffoldCOMPTYPE_NONE (0x0000) | ||
50 | #define cffoldCOMPTYPE_MSZIP (0x0001) | ||
51 | #define cffoldCOMPTYPE_QUANTUM (0x0002) | ||
52 | #define cffoldCOMPTYPE_LZX (0x0003) | ||
53 | #define cfheadPREV_CABINET (0x0001) | ||
54 | #define cfheadNEXT_CABINET (0x0002) | ||
55 | #define cfheadRESERVE_PRESENT (0x0004) | ||
56 | #define cffileCONTINUED_FROM_PREV (0xFFFD) | ||
57 | #define cffileCONTINUED_TO_NEXT (0xFFFE) | ||
58 | #define cffileCONTINUED_PREV_AND_NEXT (0xFFFF) | ||
59 | |||
60 | /* CAB data blocks are <= 32768 bytes in uncompressed form. Uncompressed | ||
61 | * blocks have zero growth. MSZIP guarantees that it won't grow above | ||
62 | * uncompressed size by more than 12 bytes. LZX guarantees it won't grow | ||
63 | * more than 6144 bytes. Quantum has no documentation, but the largest | ||
64 | * block seen in the wild is 337 bytes above uncompressed size. | ||
65 | */ | ||
66 | #define CAB_BLOCKMAX (32768) | ||
67 | #define CAB_INPUTMAX (CAB_BLOCKMAX+6144) | ||
68 | |||
69 | /* input buffer needs to be CAB_INPUTMAX + 1 byte to allow for max-sized block | ||
70 | * plus 1 trailer byte added by cabd_sys_read_block() for Quantum alignment. | ||
71 | * | ||
72 | * When MSCABD_PARAM_SALVAGE is set, block size is not checked so can be | ||
73 | * up to 65535 bytes, so max input buffer size needed is 65535 + 1 | ||
74 | */ | ||
75 | #define CAB_INPUTMAX_SALVAGE (65535) | ||
76 | #define CAB_INPUTBUF (CAB_INPUTMAX_SALVAGE + 1) | ||
77 | |||
78 | /* There are no more than 65535 data blocks per folder, so a folder cannot | ||
79 | * be more than 32768*65535 bytes in length. As files cannot span more than | ||
80 | * one folder, this is also their max offset, length and offset+length limit. | ||
81 | */ | ||
82 | #define CAB_FOLDERMAX (65535) | ||
83 | #define CAB_LENGTHMAX (CAB_BLOCKMAX * CAB_FOLDERMAX) | ||
84 | |||
85 | /* CAB compression definitions */ | ||
86 | |||
87 | struct mscab_compressor_p { | ||
88 | struct mscab_compressor base; | ||
89 | struct mspack_system *system; | ||
90 | /* todo */ | ||
91 | }; | ||
92 | |||
93 | /* CAB decompression definitions */ | ||
94 | |||
95 | struct mscabd_decompress_state { | ||
96 | struct mscabd_folder_p *folder; /* current folder we're extracting from */ | ||
97 | struct mscabd_folder_data *data; /* current folder split we're in */ | ||
98 | unsigned int offset; /* uncompressed offset within folder */ | ||
99 | unsigned int block; /* which block are we decompressing? */ | ||
100 | off_t outlen; /* cumulative sum of block output sizes */ | ||
101 | struct mspack_system sys; /* special I/O code for decompressor */ | ||
102 | int comp_type; /* type of compression used by folder */ | ||
103 | int (*decompress)(void *, off_t); /* decompressor code */ | ||
104 | void *state; /* decompressor state */ | ||
105 | struct mscabd_cabinet_p *incab; /* cabinet where input data comes from */ | ||
106 | struct mspack_file *infh; /* input file handle */ | ||
107 | struct mspack_file *outfh; /* output file handle */ | ||
108 | unsigned char *i_ptr, *i_end; /* input data consumed, end */ | ||
109 | unsigned char input[CAB_INPUTBUF]; /* one input block of data */ | ||
110 | }; | ||
111 | |||
112 | struct mscab_decompressor_p { | ||
113 | struct mscab_decompressor base; | ||
114 | struct mscabd_decompress_state *d; | ||
115 | struct mspack_system *system; | ||
116 | int buf_size, searchbuf_size, fix_mszip, salvage; /* params */ | ||
117 | int error, read_error; | ||
118 | }; | ||
119 | |||
120 | struct mscabd_cabinet_p { | ||
121 | struct mscabd_cabinet base; | ||
122 | off_t blocks_off; /* offset to data blocks */ | ||
123 | int block_resv; /* reserved space in data blocks */ | ||
124 | }; | ||
125 | |||
126 | /* there is one of these for every cabinet a folder spans */ | ||
127 | struct mscabd_folder_data { | ||
128 | struct mscabd_folder_data *next; | ||
129 | struct mscabd_cabinet_p *cab; /* cabinet file of this folder span */ | ||
130 | off_t offset; /* cabinet offset of first datablock */ | ||
131 | }; | ||
132 | |||
133 | struct mscabd_folder_p { | ||
134 | struct mscabd_folder base; | ||
135 | struct mscabd_folder_data data; /* where are the data blocks? */ | ||
136 | struct mscabd_file *merge_prev; /* first file needing backwards merge */ | ||
137 | struct mscabd_file *merge_next; /* first file needing forwards merge */ | ||
138 | }; | ||
139 | |||
140 | #endif | ||