1/* 7z.h -- 7z interface
22010-03-11 : Igor Pavlov : Public domain */
3
4#ifndef __7Z_H
5#define __7Z_H
6
7#include "7zBuf.h"
8
9EXTERN_C_BEGIN
10
11#define k7zStartHeaderSize 0x20
12#define k7zSignatureSize 6
13extern Byte k7zSignature[k7zSignatureSize];
14#define k7zMajorVersion 0
15
16enum EIdEnum
17{
18 k7zIdEnd,
19 k7zIdHeader,
20 k7zIdArchiveProperties,
21 k7zIdAdditionalStreamsInfo,
22 k7zIdMainStreamsInfo,
23 k7zIdFilesInfo,
24 k7zIdPackInfo,
25 k7zIdUnpackInfo,
26 k7zIdSubStreamsInfo,
27 k7zIdSize,
28 k7zIdCRC,
29 k7zIdFolder,
30 k7zIdCodersUnpackSize,
31 k7zIdNumUnpackStream,
32 k7zIdEmptyStream,
33 k7zIdEmptyFile,
34 k7zIdAnti,
35 k7zIdName,
36 k7zIdCTime,
37 k7zIdATime,
38 k7zIdMTime,
39 k7zIdWinAttributes,
40 k7zIdComment,
41 k7zIdEncodedHeader,
42 k7zIdStartPos,
43 k7zIdDummy
44};
45
46typedef struct
47{
48 UInt32 NumInStreams;
49 UInt32 NumOutStreams;
50 UInt64 MethodID;
51 CBuf Props;
52} CSzCoderInfo;
53
54void SzCoderInfo_Init(CSzCoderInfo *p);
55void SzCoderInfo_Free(CSzCoderInfo *p, ISzAlloc *alloc);
56
57typedef struct
58{
59 UInt32 InIndex;
60 UInt32 OutIndex;
61} CSzBindPair;
62
63typedef struct
64{
65 CSzCoderInfo *Coders;
66 CSzBindPair *BindPairs;
67 UInt32 *PackStreams;
68 UInt64 *UnpackSizes;
69 UInt32 NumCoders;
70 UInt32 NumBindPairs;
71 UInt32 NumPackStreams;
72 int UnpackCRCDefined;
73 UInt32 UnpackCRC;
74
75 UInt32 NumUnpackStreams;
76} CSzFolder;
77
78void SzFolder_Init(CSzFolder *p);
79UInt64 SzFolder_GetUnpackSize(CSzFolder *p);
80int SzFolder_FindBindPairForInStream(CSzFolder *p, UInt32 inStreamIndex);
81UInt32 SzFolder_GetNumOutStreams(CSzFolder *p);
82UInt64 SzFolder_GetUnpackSize(CSzFolder *p);
83
84SRes SzFolder_Decode(const CSzFolder *folder, const UInt64 *packSizes,
85 ILookInStream *stream, UInt64 startPos,
86 Byte *outBuffer, size_t outSize, ISzAlloc *allocMain);
87
88typedef struct
89{
90 UInt32 Low;
91 UInt32 High;
92} CNtfsFileTime;
93
94typedef struct
95{
96 CNtfsFileTime MTime;
97 UInt64 Size;
98 UInt32 Crc;
99 UInt32 Attrib;
100 Byte HasStream;
101 Byte IsDir;
102 Byte IsAnti;
103 Byte CrcDefined;
104 Byte MTimeDefined;
105 Byte AttribDefined;
106} CSzFileItem;
107
108void SzFile_Init(CSzFileItem *p);
109
110typedef struct
111{
112 UInt64 *PackSizes;
113 Byte *PackCRCsDefined;
114 UInt32 *PackCRCs;
115 CSzFolder *Folders;
116 CSzFileItem *Files;
117 UInt32 NumPackStreams;
118 UInt32 NumFolders;
119 UInt32 NumFiles;
120} CSzAr;
121
122void SzAr_Init(CSzAr *p);
123void SzAr_Free(CSzAr *p, ISzAlloc *alloc);
124
125
126/*
127 SzExtract extracts file from archive
128
129 *outBuffer must be 0 before first call for each new archive.
130
131 Extracting cache:
132 If you need to decompress more than one file, you can send
133 these values from previous call:
134 *blockIndex,
135 *outBuffer,
136 *outBufferSize
137 You can consider "*outBuffer" as cache of solid block. If your archive is solid,
138 it will increase decompression speed.
139
140 If you use external function, you can declare these 3 cache variables
141 (blockIndex, outBuffer, outBufferSize) as static in that external function.
142
143 Free *outBuffer and set *outBuffer to 0, if you want to flush cache.
144*/
145
146typedef struct
147{
148 CSzAr db;
149
150 UInt64 startPosAfterHeader;
151 UInt64 dataPos;
152
153 UInt32 *FolderStartPackStreamIndex;
154 UInt64 *PackStreamStartPositions;
155 UInt32 *FolderStartFileIndex;
156 UInt32 *FileIndexToFolderIndexMap;
157
158 size_t *FileNameOffsets; /* in 2-byte steps */
159 CBuf FileNames; /* UTF-16-LE */
160} CSzArEx;
161
162void SzArEx_Init(CSzArEx *p);
163void SzArEx_Free(CSzArEx *p, ISzAlloc *alloc);
164UInt64 SzArEx_GetFolderStreamPos(const CSzArEx *p, UInt32 folderIndex, UInt32 indexInFolder);
165int SzArEx_GetFolderFullPackSize(const CSzArEx *p, UInt32 folderIndex, UInt64 *resSize);
166
167/*
168if dest == NULL, the return value specifies the required size of the buffer,
169 in 16-bit characters, including the null-terminating character.
170if dest != NULL, the return value specifies the number of 16-bit characters that
171 are written to the dest, including the null-terminating character. */
172
173size_t SzArEx_GetFileNameUtf16(const CSzArEx *p, size_t fileIndex, UInt16 *dest);
174
175SRes SzArEx_Extract(
176 const CSzArEx *db,
177 ILookInStream *inStream,
178 UInt32 fileIndex, /* index of file */
179 UInt32 *blockIndex, /* index of solid block */
180 Byte **outBuffer, /* pointer to pointer to output buffer (allocated with allocMain) */
181 size_t *outBufferSize, /* buffer size for output buffer */
182 size_t *offset, /* offset of stream for required file in *outBuffer */
183 size_t *outSizeProcessed, /* size of file in *outBuffer */
184 ISzAlloc *allocMain,
185 ISzAlloc *allocTemp);
186
187
188/*
189SzArEx_Open Errors:
190SZ_ERROR_NO_ARCHIVE
191SZ_ERROR_ARCHIVE
192SZ_ERROR_UNSUPPORTED
193SZ_ERROR_MEM
194SZ_ERROR_CRC
195SZ_ERROR_INPUT_EOF
196SZ_ERROR_FAIL
197*/
198
199SRes SzArEx_Open(CSzArEx *p, ILookInStream *inStream, ISzAlloc *allocMain, ISzAlloc *allocTemp);
200
201EXTERN_C_END
202
203#endif
204