204 lines
4.8 KiB
C
204 lines
4.8 KiB
C
/* 7z.h -- 7z interface
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2010-03-11 : Igor Pavlov : Public domain */
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#ifndef __7Z_H
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#define __7Z_H
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#include "7zBuf.h"
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EXTERN_C_BEGIN
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#define k7zStartHeaderSize 0x20
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#define k7zSignatureSize 6
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extern Byte k7zSignature[k7zSignatureSize];
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#define k7zMajorVersion 0
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enum EIdEnum
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{
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k7zIdEnd,
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k7zIdHeader,
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k7zIdArchiveProperties,
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k7zIdAdditionalStreamsInfo,
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k7zIdMainStreamsInfo,
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k7zIdFilesInfo,
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k7zIdPackInfo,
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k7zIdUnpackInfo,
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k7zIdSubStreamsInfo,
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k7zIdSize,
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k7zIdCRC,
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k7zIdFolder,
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k7zIdCodersUnpackSize,
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k7zIdNumUnpackStream,
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k7zIdEmptyStream,
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k7zIdEmptyFile,
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k7zIdAnti,
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k7zIdName,
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k7zIdCTime,
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k7zIdATime,
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k7zIdMTime,
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k7zIdWinAttributes,
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k7zIdComment,
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k7zIdEncodedHeader,
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k7zIdStartPos,
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k7zIdDummy
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};
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typedef struct
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{
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UInt32 NumInStreams;
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UInt32 NumOutStreams;
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UInt64 MethodID;
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CBuf Props;
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} CSzCoderInfo;
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void SzCoderInfo_Init(CSzCoderInfo *p);
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void SzCoderInfo_Free(CSzCoderInfo *p, ISzAlloc *alloc);
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typedef struct
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{
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UInt32 InIndex;
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UInt32 OutIndex;
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} CSzBindPair;
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typedef struct
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{
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CSzCoderInfo *Coders;
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CSzBindPair *BindPairs;
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UInt32 *PackStreams;
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UInt64 *UnpackSizes;
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UInt32 NumCoders;
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UInt32 NumBindPairs;
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UInt32 NumPackStreams;
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int UnpackCRCDefined;
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UInt32 UnpackCRC;
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UInt32 NumUnpackStreams;
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} CSzFolder;
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void SzFolder_Init(CSzFolder *p);
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UInt64 SzFolder_GetUnpackSize(CSzFolder *p);
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int SzFolder_FindBindPairForInStream(CSzFolder *p, UInt32 inStreamIndex);
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UInt32 SzFolder_GetNumOutStreams(CSzFolder *p);
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UInt64 SzFolder_GetUnpackSize(CSzFolder *p);
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SRes SzFolder_Decode(const CSzFolder *folder, const UInt64 *packSizes,
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ILookInStream *stream, UInt64 startPos,
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Byte *outBuffer, size_t outSize, ISzAlloc *allocMain);
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typedef struct
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{
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UInt32 Low;
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UInt32 High;
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} CNtfsFileTime;
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typedef struct
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{
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CNtfsFileTime MTime;
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UInt64 Size;
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UInt32 Crc;
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UInt32 Attrib;
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Byte HasStream;
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Byte IsDir;
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Byte IsAnti;
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Byte CrcDefined;
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Byte MTimeDefined;
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Byte AttribDefined;
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} CSzFileItem;
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void SzFile_Init(CSzFileItem *p);
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typedef struct
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{
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UInt64 *PackSizes;
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Byte *PackCRCsDefined;
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UInt32 *PackCRCs;
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CSzFolder *Folders;
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CSzFileItem *Files;
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UInt32 NumPackStreams;
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UInt32 NumFolders;
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UInt32 NumFiles;
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} CSzAr;
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void SzAr_Init(CSzAr *p);
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void SzAr_Free(CSzAr *p, ISzAlloc *alloc);
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/*
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SzExtract extracts file from archive
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*outBuffer must be 0 before first call for each new archive.
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Extracting cache:
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If you need to decompress more than one file, you can send
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these values from previous call:
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*blockIndex,
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*outBuffer,
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*outBufferSize
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You can consider "*outBuffer" as cache of solid block. If your archive is solid,
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it will increase decompression speed.
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If you use external function, you can declare these 3 cache variables
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(blockIndex, outBuffer, outBufferSize) as static in that external function.
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Free *outBuffer and set *outBuffer to 0, if you want to flush cache.
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*/
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typedef struct
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{
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CSzAr db;
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UInt64 startPosAfterHeader;
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UInt64 dataPos;
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UInt32 *FolderStartPackStreamIndex;
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UInt64 *PackStreamStartPositions;
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UInt32 *FolderStartFileIndex;
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UInt32 *FileIndexToFolderIndexMap;
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size_t *FileNameOffsets; /* in 2-byte steps */
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CBuf FileNames; /* UTF-16-LE */
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} CSzArEx;
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void SzArEx_Init(CSzArEx *p);
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void SzArEx_Free(CSzArEx *p, ISzAlloc *alloc);
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UInt64 SzArEx_GetFolderStreamPos(const CSzArEx *p, UInt32 folderIndex, UInt32 indexInFolder);
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int SzArEx_GetFolderFullPackSize(const CSzArEx *p, UInt32 folderIndex, UInt64 *resSize);
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/*
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if dest == NULL, the return value specifies the required size of the buffer,
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in 16-bit characters, including the null-terminating character.
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if dest != NULL, the return value specifies the number of 16-bit characters that
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are written to the dest, including the null-terminating character. */
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size_t SzArEx_GetFileNameUtf16(const CSzArEx *p, size_t fileIndex, UInt16 *dest);
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SRes SzArEx_Extract(
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const CSzArEx *db,
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ILookInStream *inStream,
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UInt32 fileIndex, /* index of file */
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UInt32 *blockIndex, /* index of solid block */
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Byte **outBuffer, /* pointer to pointer to output buffer (allocated with allocMain) */
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size_t *outBufferSize, /* buffer size for output buffer */
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size_t *offset, /* offset of stream for required file in *outBuffer */
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size_t *outSizeProcessed, /* size of file in *outBuffer */
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ISzAlloc *allocMain,
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ISzAlloc *allocTemp);
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/*
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SzArEx_Open Errors:
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SZ_ERROR_NO_ARCHIVE
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SZ_ERROR_ARCHIVE
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SZ_ERROR_UNSUPPORTED
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SZ_ERROR_MEM
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SZ_ERROR_CRC
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SZ_ERROR_INPUT_EOF
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SZ_ERROR_FAIL
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*/
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SRes SzArEx_Open(CSzArEx *p, ILookInStream *inStream, ISzAlloc *allocMain, ISzAlloc *allocTemp);
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EXTERN_C_END
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#endif
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