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Diffstat (limited to 'C/7z.h')
-rwxr-xr-x | C/7z.h | 201 |
1 files changed, 201 insertions, 0 deletions
@@ -0,0 +1,201 @@ +/* 7z.h -- 7z interface +2009-08-17 : Igor Pavlov : Public domain */ + +#ifndef __7Z_H +#define __7Z_H + +#include "7zBuf.h" + +EXTERN_C_BEGIN + +#define k7zStartHeaderSize 0x20 +#define k7zSignatureSize 6 +extern Byte k7zSignature[k7zSignatureSize]; +#define k7zMajorVersion 0 + +enum EIdEnum +{ + k7zIdEnd, + k7zIdHeader, + k7zIdArchiveProperties, + k7zIdAdditionalStreamsInfo, + k7zIdMainStreamsInfo, + k7zIdFilesInfo, + k7zIdPackInfo, + k7zIdUnpackInfo, + k7zIdSubStreamsInfo, + k7zIdSize, + k7zIdCRC, + k7zIdFolder, + k7zIdCodersUnpackSize, + k7zIdNumUnpackStream, + k7zIdEmptyStream, + k7zIdEmptyFile, + k7zIdAnti, + k7zIdName, + k7zIdCTime, + k7zIdATime, + k7zIdMTime, + k7zIdWinAttributes, + k7zIdComment, + k7zIdEncodedHeader, + k7zIdStartPos, + k7zIdDummy +}; + +typedef struct +{ + UInt32 NumInStreams; + UInt32 NumOutStreams; + UInt64 MethodID; + CBuf Props; +} CSzCoderInfo; + +void SzCoderInfo_Init(CSzCoderInfo *p); +void SzCoderInfo_Free(CSzCoderInfo *p, ISzAlloc *alloc); + +typedef struct +{ + UInt32 InIndex; + UInt32 OutIndex; +} CSzBindPair; + +typedef struct +{ + CSzCoderInfo *Coders; + CSzBindPair *BindPairs; + UInt32 *PackStreams; + UInt64 *UnpackSizes; + UInt32 NumCoders; + UInt32 NumBindPairs; + UInt32 NumPackStreams; + int UnpackCRCDefined; + UInt32 UnpackCRC; + + UInt32 NumUnpackStreams; +} CSzFolder; + +void SzFolder_Init(CSzFolder *p); +UInt64 SzFolder_GetUnpackSize(CSzFolder *p); +int SzFolder_FindBindPairForInStream(CSzFolder *p, UInt32 inStreamIndex); +UInt32 SzFolder_GetNumOutStreams(CSzFolder *p); +UInt64 SzFolder_GetUnpackSize(CSzFolder *p); + +SRes SzFolder_Decode(const CSzFolder *folder, const UInt64 *packSizes, + ILookInStream *stream, UInt64 startPos, + Byte *outBuffer, size_t outSize, ISzAlloc *allocMain); + +typedef struct +{ + UInt32 Low; + UInt32 High; +} CNtfsFileTime; + +typedef struct +{ + CNtfsFileTime MTime; + UInt64 Size; + UInt32 Crc; + Byte HasStream; + Byte IsDir; + Byte IsAnti; + Byte CrcDefined; + Byte MTimeDefined; +} CSzFileItem; + +void SzFile_Init(CSzFileItem *p); + +typedef struct +{ + UInt64 *PackSizes; + Byte *PackCRCsDefined; + UInt32 *PackCRCs; + CSzFolder *Folders; + CSzFileItem *Files; + UInt32 NumPackStreams; + UInt32 NumFolders; + UInt32 NumFiles; +} CSzAr; + +void SzAr_Init(CSzAr *p); +void SzAr_Free(CSzAr *p, ISzAlloc *alloc); + + +/* + SzExtract extracts file from archive + + *outBuffer must be 0 before first call for each new archive. + + Extracting cache: + If you need to decompress more than one file, you can send + these values from previous call: + *blockIndex, + *outBuffer, + *outBufferSize + You can consider "*outBuffer" as cache of solid block. If your archive is solid, + it will increase decompression speed. + + If you use external function, you can declare these 3 cache variables + (blockIndex, outBuffer, outBufferSize) as static in that external function. + + Free *outBuffer and set *outBuffer to 0, if you want to flush cache. +*/ + +typedef struct +{ + CSzAr db; + + UInt64 startPosAfterHeader; + UInt64 dataPos; + + UInt32 *FolderStartPackStreamIndex; + UInt64 *PackStreamStartPositions; + UInt32 *FolderStartFileIndex; + UInt32 *FileIndexToFolderIndexMap; + + size_t *FileNameOffsets; /* in 2-byte steps */ + CBuf FileNames; /* UTF-16-LE */ +} CSzArEx; + +void SzArEx_Init(CSzArEx *p); +void SzArEx_Free(CSzArEx *p, ISzAlloc *alloc); +UInt64 SzArEx_GetFolderStreamPos(const CSzArEx *p, UInt32 folderIndex, UInt32 indexInFolder); +int SzArEx_GetFolderFullPackSize(const CSzArEx *p, UInt32 folderIndex, UInt64 *resSize); + +/* +if dest == NULL, the return value specifies the required size of the buffer, + in 16-bit characters, including the null-terminating character. +if dest != NULL, the return value specifies the number of 16-bit characters that + are written to the dest, including the null-terminating character. */ + +size_t SzArEx_GetFileNameUtf16(const CSzArEx *p, size_t fileIndex, UInt16 *dest); + +SRes SzArEx_Extract( + const CSzArEx *db, + ILookInStream *inStream, + UInt32 fileIndex, /* index of file */ + UInt32 *blockIndex, /* index of solid block */ + Byte **outBuffer, /* pointer to pointer to output buffer (allocated with allocMain) */ + size_t *outBufferSize, /* buffer size for output buffer */ + size_t *offset, /* offset of stream for required file in *outBuffer */ + size_t *outSizeProcessed, /* size of file in *outBuffer */ + ISzAlloc *allocMain, + ISzAlloc *allocTemp); + + +/* +SzArEx_Open Errors: +SZ_ERROR_NO_ARCHIVE +SZ_ERROR_ARCHIVE +SZ_ERROR_UNSUPPORTED +SZ_ERROR_MEM +SZ_ERROR_CRC +SZ_ERROR_INPUT_EOF +SZ_ERROR_FAIL +*/ + +SRes SzArEx_Open(CSzArEx *p, ILookInStream *inStream, ISzAlloc *allocMain, ISzAlloc *allocTemp); + +EXTERN_C_END + +#endif |