1403 lines
34 KiB
C
1403 lines
34 KiB
C
/* 7zIn.c -- 7z Input functions
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2010-10-29 : Igor Pavlov : Public domain */
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#include <string.h>
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#include "7z.h"
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#include "7zCrc.h"
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#include "CpuArch.h"
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Byte k7zSignature[k7zSignatureSize] = {'7', 'z', 0xBC, 0xAF, 0x27, 0x1C};
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#define RINOM(x) { if ((x) == 0) return SZ_ERROR_MEM; }
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#define NUM_FOLDER_CODERS_MAX 32
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#define NUM_CODER_STREAMS_MAX 32
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void SzCoderInfo_Init(CSzCoderInfo *p)
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{
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Buf_Init(&p->Props);
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}
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void SzCoderInfo_Free(CSzCoderInfo *p, ISzAlloc *alloc)
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{
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Buf_Free(&p->Props, alloc);
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SzCoderInfo_Init(p);
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}
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void SzFolder_Init(CSzFolder *p)
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{
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p->Coders = 0;
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p->BindPairs = 0;
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p->PackStreams = 0;
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p->UnpackSizes = 0;
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p->NumCoders = 0;
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p->NumBindPairs = 0;
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p->NumPackStreams = 0;
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p->UnpackCRCDefined = 0;
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p->UnpackCRC = 0;
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p->NumUnpackStreams = 0;
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}
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void SzFolder_Free(CSzFolder *p, ISzAlloc *alloc)
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{
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UInt32 i;
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if (p->Coders)
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for (i = 0; i < p->NumCoders; i++)
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SzCoderInfo_Free(&p->Coders[i], alloc);
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IAlloc_Free(alloc, p->Coders);
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IAlloc_Free(alloc, p->BindPairs);
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IAlloc_Free(alloc, p->PackStreams);
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IAlloc_Free(alloc, p->UnpackSizes);
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SzFolder_Init(p);
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}
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UInt32 SzFolder_GetNumOutStreams(CSzFolder *p)
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{
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UInt32 result = 0;
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UInt32 i;
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for (i = 0; i < p->NumCoders; i++)
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result += p->Coders[i].NumOutStreams;
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return result;
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}
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int SzFolder_FindBindPairForInStream(CSzFolder *p, UInt32 inStreamIndex)
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{
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UInt32 i;
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for (i = 0; i < p->NumBindPairs; i++)
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if (p->BindPairs[i].InIndex == inStreamIndex)
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return i;
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return -1;
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}
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int SzFolder_FindBindPairForOutStream(CSzFolder *p, UInt32 outStreamIndex)
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{
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UInt32 i;
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for (i = 0; i < p->NumBindPairs; i++)
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if (p->BindPairs[i].OutIndex == outStreamIndex)
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return i;
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return -1;
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}
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UInt64 SzFolder_GetUnpackSize(CSzFolder *p)
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{
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int i = (int)SzFolder_GetNumOutStreams(p);
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if (i == 0)
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return 0;
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for (i--; i >= 0; i--)
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if (SzFolder_FindBindPairForOutStream(p, i) < 0)
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return p->UnpackSizes[i];
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/* throw 1; */
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return 0;
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}
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void SzFile_Init(CSzFileItem *p)
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{
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p->HasStream = 1;
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p->IsDir = 0;
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p->IsAnti = 0;
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p->CrcDefined = 0;
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p->MTimeDefined = 0;
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}
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void SzAr_Init(CSzAr *p)
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{
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p->PackSizes = 0;
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p->PackCRCsDefined = 0;
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p->PackCRCs = 0;
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p->Folders = 0;
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p->Files = 0;
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p->NumPackStreams = 0;
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p->NumFolders = 0;
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p->NumFiles = 0;
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}
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void SzAr_Free(CSzAr *p, ISzAlloc *alloc)
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{
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UInt32 i;
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if (p->Folders)
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for (i = 0; i < p->NumFolders; i++)
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SzFolder_Free(&p->Folders[i], alloc);
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IAlloc_Free(alloc, p->PackSizes);
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IAlloc_Free(alloc, p->PackCRCsDefined);
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IAlloc_Free(alloc, p->PackCRCs);
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IAlloc_Free(alloc, p->Folders);
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IAlloc_Free(alloc, p->Files);
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SzAr_Init(p);
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}
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void SzArEx_Init(CSzArEx *p)
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{
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SzAr_Init(&p->db);
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p->FolderStartPackStreamIndex = 0;
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p->PackStreamStartPositions = 0;
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p->FolderStartFileIndex = 0;
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p->FileIndexToFolderIndexMap = 0;
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p->FileNameOffsets = 0;
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Buf_Init(&p->FileNames);
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}
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void SzArEx_Free(CSzArEx *p, ISzAlloc *alloc)
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{
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IAlloc_Free(alloc, p->FolderStartPackStreamIndex);
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IAlloc_Free(alloc, p->PackStreamStartPositions);
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IAlloc_Free(alloc, p->FolderStartFileIndex);
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IAlloc_Free(alloc, p->FileIndexToFolderIndexMap);
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IAlloc_Free(alloc, p->FileNameOffsets);
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Buf_Free(&p->FileNames, alloc);
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SzAr_Free(&p->db, alloc);
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SzArEx_Init(p);
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}
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/*
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UInt64 GetFolderPackStreamSize(int folderIndex, int streamIndex) const
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{
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return PackSizes[FolderStartPackStreamIndex[folderIndex] + streamIndex];
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}
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UInt64 GetFilePackSize(int fileIndex) const
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{
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int folderIndex = FileIndexToFolderIndexMap[fileIndex];
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if (folderIndex >= 0)
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{
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const CSzFolder &folderInfo = Folders[folderIndex];
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if (FolderStartFileIndex[folderIndex] == fileIndex)
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return GetFolderFullPackSize(folderIndex);
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}
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return 0;
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}
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*/
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#define MY_ALLOC(T, p, size, alloc) { if ((size) == 0) p = 0; else \
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if ((p = (T *)IAlloc_Alloc(alloc, (size) * sizeof(T))) == 0) return SZ_ERROR_MEM; }
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static SRes SzArEx_Fill(CSzArEx *p, ISzAlloc *alloc)
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{
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UInt32 startPos = 0;
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UInt64 startPosSize = 0;
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UInt32 i;
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UInt32 folderIndex = 0;
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UInt32 indexInFolder = 0;
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MY_ALLOC(UInt32, p->FolderStartPackStreamIndex, p->db.NumFolders, alloc);
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for (i = 0; i < p->db.NumFolders; i++)
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{
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p->FolderStartPackStreamIndex[i] = startPos;
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startPos += p->db.Folders[i].NumPackStreams;
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}
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MY_ALLOC(UInt64, p->PackStreamStartPositions, p->db.NumPackStreams, alloc);
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for (i = 0; i < p->db.NumPackStreams; i++)
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{
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p->PackStreamStartPositions[i] = startPosSize;
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startPosSize += p->db.PackSizes[i];
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}
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MY_ALLOC(UInt32, p->FolderStartFileIndex, p->db.NumFolders, alloc);
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MY_ALLOC(UInt32, p->FileIndexToFolderIndexMap, p->db.NumFiles, alloc);
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for (i = 0; i < p->db.NumFiles; i++)
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{
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CSzFileItem *file = p->db.Files + i;
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int emptyStream = !file->HasStream;
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if (emptyStream && indexInFolder == 0)
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{
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p->FileIndexToFolderIndexMap[i] = (UInt32)-1;
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continue;
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}
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if (indexInFolder == 0)
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{
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/*
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v3.13 incorrectly worked with empty folders
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v4.07: Loop for skipping empty folders
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*/
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for (;;)
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{
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if (folderIndex >= p->db.NumFolders)
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return SZ_ERROR_ARCHIVE;
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p->FolderStartFileIndex[folderIndex] = i;
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if (p->db.Folders[folderIndex].NumUnpackStreams != 0)
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break;
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folderIndex++;
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}
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}
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p->FileIndexToFolderIndexMap[i] = folderIndex;
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if (emptyStream)
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continue;
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indexInFolder++;
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if (indexInFolder >= p->db.Folders[folderIndex].NumUnpackStreams)
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{
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folderIndex++;
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indexInFolder = 0;
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}
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}
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return SZ_OK;
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}
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UInt64 SzArEx_GetFolderStreamPos(const CSzArEx *p, UInt32 folderIndex, UInt32 indexInFolder)
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{
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return p->dataPos +
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p->PackStreamStartPositions[p->FolderStartPackStreamIndex[folderIndex] + indexInFolder];
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}
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int SzArEx_GetFolderFullPackSize(const CSzArEx *p, UInt32 folderIndex, UInt64 *resSize)
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{
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UInt32 packStreamIndex = p->FolderStartPackStreamIndex[folderIndex];
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CSzFolder *folder = p->db.Folders + folderIndex;
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UInt64 size = 0;
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UInt32 i;
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for (i = 0; i < folder->NumPackStreams; i++)
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{
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UInt64 t = size + p->db.PackSizes[packStreamIndex + i];
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if (t < size) /* check it */
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return SZ_ERROR_FAIL;
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size = t;
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}
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*resSize = size;
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return SZ_OK;
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}
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/*
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SRes SzReadTime(const CObjectVector<CBuf> &dataVector,
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CObjectVector<CSzFileItem> &files, UInt64 type)
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{
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CBoolVector boolVector;
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RINOK(ReadBoolVector2(files.Size(), boolVector))
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CStreamSwitch streamSwitch;
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RINOK(streamSwitch.Set(this, &dataVector));
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for (int i = 0; i < files.Size(); i++)
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{
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CSzFileItem &file = files[i];
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CArchiveFileTime fileTime;
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bool defined = boolVector[i];
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if (defined)
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{
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UInt32 low, high;
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RINOK(SzReadUInt32(low));
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RINOK(SzReadUInt32(high));
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fileTime.dwLowDateTime = low;
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fileTime.dwHighDateTime = high;
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}
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switch(type)
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{
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case k7zIdCTime: file.IsCTimeDefined = defined; if (defined) file.CTime = fileTime; break;
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case k7zIdATime: file.IsATimeDefined = defined; if (defined) file.ATime = fileTime; break;
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case k7zIdMTime: file.IsMTimeDefined = defined; if (defined) file.MTime = fileTime; break;
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}
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}
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return SZ_OK;
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}
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*/
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static int TestSignatureCandidate(Byte *testBytes)
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{
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size_t i;
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for (i = 0; i < k7zSignatureSize; i++)
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if (testBytes[i] != k7zSignature[i])
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return 0;
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return 1;
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}
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typedef struct _CSzState
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{
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Byte *Data;
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size_t Size;
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}CSzData;
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static SRes SzReadByte(CSzData *sd, Byte *b)
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{
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if (sd->Size == 0)
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return SZ_ERROR_ARCHIVE;
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sd->Size--;
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*b = *sd->Data++;
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return SZ_OK;
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}
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static SRes SzReadBytes(CSzData *sd, Byte *data, size_t size)
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{
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size_t i;
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for (i = 0; i < size; i++)
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{
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RINOK(SzReadByte(sd, data + i));
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}
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return SZ_OK;
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}
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static SRes SzReadUInt32(CSzData *sd, UInt32 *value)
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{
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int i;
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*value = 0;
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for (i = 0; i < 4; i++)
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{
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Byte b;
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RINOK(SzReadByte(sd, &b));
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*value |= ((UInt32)(b) << (8 * i));
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}
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return SZ_OK;
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}
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static SRes SzReadNumber(CSzData *sd, UInt64 *value)
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{
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Byte firstByte;
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Byte mask = 0x80;
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int i;
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RINOK(SzReadByte(sd, &firstByte));
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*value = 0;
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for (i = 0; i < 8; i++)
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{
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Byte b;
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if ((firstByte & mask) == 0)
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{
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UInt64 highPart = firstByte & (mask - 1);
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*value += (highPart << (8 * i));
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return SZ_OK;
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}
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RINOK(SzReadByte(sd, &b));
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*value |= ((UInt64)b << (8 * i));
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mask >>= 1;
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}
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return SZ_OK;
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}
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static SRes SzReadNumber32(CSzData *sd, UInt32 *value)
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{
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UInt64 value64;
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RINOK(SzReadNumber(sd, &value64));
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if (value64 >= 0x80000000)
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return SZ_ERROR_UNSUPPORTED;
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if (value64 >= ((UInt64)(1) << ((sizeof(size_t) - 1) * 8 + 2)))
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return SZ_ERROR_UNSUPPORTED;
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*value = (UInt32)value64;
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return SZ_OK;
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}
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static SRes SzReadID(CSzData *sd, UInt64 *value)
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{
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return SzReadNumber(sd, value);
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}
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static SRes SzSkeepDataSize(CSzData *sd, UInt64 size)
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{
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if (size > sd->Size)
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return SZ_ERROR_ARCHIVE;
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sd->Size -= (size_t)size;
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sd->Data += (size_t)size;
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return SZ_OK;
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}
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static SRes SzSkeepData(CSzData *sd)
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{
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UInt64 size;
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RINOK(SzReadNumber(sd, &size));
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return SzSkeepDataSize(sd, size);
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}
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static SRes SzReadArchiveProperties(CSzData *sd)
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{
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for (;;)
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{
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UInt64 type;
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RINOK(SzReadID(sd, &type));
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if (type == k7zIdEnd)
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break;
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SzSkeepData(sd);
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}
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return SZ_OK;
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}
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static SRes SzWaitAttribute(CSzData *sd, UInt64 attribute)
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{
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for (;;)
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{
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UInt64 type;
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RINOK(SzReadID(sd, &type));
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if (type == attribute)
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return SZ_OK;
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if (type == k7zIdEnd)
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return SZ_ERROR_ARCHIVE;
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RINOK(SzSkeepData(sd));
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}
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}
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static SRes SzReadBoolVector(CSzData *sd, size_t numItems, Byte **v, ISzAlloc *alloc)
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{
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Byte b = 0;
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Byte mask = 0;
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size_t i;
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MY_ALLOC(Byte, *v, numItems, alloc);
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for (i = 0; i < numItems; i++)
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{
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if (mask == 0)
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{
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RINOK(SzReadByte(sd, &b));
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mask = 0x80;
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}
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(*v)[i] = (Byte)(((b & mask) != 0) ? 1 : 0);
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mask >>= 1;
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}
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return SZ_OK;
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}
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static SRes SzReadBoolVector2(CSzData *sd, size_t numItems, Byte **v, ISzAlloc *alloc)
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{
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Byte allAreDefined;
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size_t i;
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RINOK(SzReadByte(sd, &allAreDefined));
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if (allAreDefined == 0)
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return SzReadBoolVector(sd, numItems, v, alloc);
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MY_ALLOC(Byte, *v, numItems, alloc);
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for (i = 0; i < numItems; i++)
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(*v)[i] = 1;
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return SZ_OK;
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}
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static SRes SzReadHashDigests(
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CSzData *sd,
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size_t numItems,
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Byte **digestsDefined,
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UInt32 **digests,
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ISzAlloc *alloc)
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{
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size_t i;
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RINOK(SzReadBoolVector2(sd, numItems, digestsDefined, alloc));
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MY_ALLOC(UInt32, *digests, numItems, alloc);
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for (i = 0; i < numItems; i++)
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if ((*digestsDefined)[i])
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{
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RINOK(SzReadUInt32(sd, (*digests) + i));
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}
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return SZ_OK;
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}
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|
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static SRes SzReadPackInfo(
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CSzData *sd,
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UInt64 *dataOffset,
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UInt32 *numPackStreams,
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UInt64 **packSizes,
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Byte **packCRCsDefined,
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UInt32 **packCRCs,
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ISzAlloc *alloc)
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{
|
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UInt32 i;
|
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RINOK(SzReadNumber(sd, dataOffset));
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RINOK(SzReadNumber32(sd, numPackStreams));
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RINOK(SzWaitAttribute(sd, k7zIdSize));
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MY_ALLOC(UInt64, *packSizes, (size_t)*numPackStreams, alloc);
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for (i = 0; i < *numPackStreams; i++)
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{
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RINOK(SzReadNumber(sd, (*packSizes) + i));
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}
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for (;;)
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{
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UInt64 type;
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RINOK(SzReadID(sd, &type));
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if (type == k7zIdEnd)
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break;
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if (type == k7zIdCRC)
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{
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RINOK(SzReadHashDigests(sd, (size_t)*numPackStreams, packCRCsDefined, packCRCs, alloc));
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continue;
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}
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RINOK(SzSkeepData(sd));
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}
|
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if (*packCRCsDefined == 0)
|
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{
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MY_ALLOC(Byte, *packCRCsDefined, (size_t)*numPackStreams, alloc);
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MY_ALLOC(UInt32, *packCRCs, (size_t)*numPackStreams, alloc);
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for (i = 0; i < *numPackStreams; i++)
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{
|
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(*packCRCsDefined)[i] = 0;
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(*packCRCs)[i] = 0;
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}
|
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}
|
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return SZ_OK;
|
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}
|
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|
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static SRes SzReadSwitch(CSzData *sd)
|
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{
|
|
Byte external;
|
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RINOK(SzReadByte(sd, &external));
|
|
return (external == 0) ? SZ_OK: SZ_ERROR_UNSUPPORTED;
|
|
}
|
|
|
|
static SRes SzGetNextFolderItem(CSzData *sd, CSzFolder *folder, ISzAlloc *alloc)
|
|
{
|
|
UInt32 numCoders, numBindPairs, numPackStreams, i;
|
|
UInt32 numInStreams = 0, numOutStreams = 0;
|
|
|
|
RINOK(SzReadNumber32(sd, &numCoders));
|
|
if (numCoders > NUM_FOLDER_CODERS_MAX)
|
|
return SZ_ERROR_UNSUPPORTED;
|
|
folder->NumCoders = numCoders;
|
|
|
|
MY_ALLOC(CSzCoderInfo, folder->Coders, (size_t)numCoders, alloc);
|
|
|
|
for (i = 0; i < numCoders; i++)
|
|
SzCoderInfo_Init(folder->Coders + i);
|
|
|
|
for (i = 0; i < numCoders; i++)
|
|
{
|
|
Byte mainByte;
|
|
CSzCoderInfo *coder = folder->Coders + i;
|
|
{
|
|
unsigned idSize, j;
|
|
Byte longID[15];
|
|
RINOK(SzReadByte(sd, &mainByte));
|
|
idSize = (unsigned)(mainByte & 0xF);
|
|
RINOK(SzReadBytes(sd, longID, idSize));
|
|
if (idSize > sizeof(coder->MethodID))
|
|
return SZ_ERROR_UNSUPPORTED;
|
|
coder->MethodID = 0;
|
|
for (j = 0; j < idSize; j++)
|
|
coder->MethodID |= (UInt64)longID[idSize - 1 - j] << (8 * j);
|
|
|
|
if ((mainByte & 0x10) != 0)
|
|
{
|
|
RINOK(SzReadNumber32(sd, &coder->NumInStreams));
|
|
RINOK(SzReadNumber32(sd, &coder->NumOutStreams));
|
|
if (coder->NumInStreams > NUM_CODER_STREAMS_MAX ||
|
|
coder->NumOutStreams > NUM_CODER_STREAMS_MAX)
|
|
return SZ_ERROR_UNSUPPORTED;
|
|
}
|
|
else
|
|
{
|
|
coder->NumInStreams = 1;
|
|
coder->NumOutStreams = 1;
|
|
}
|
|
if ((mainByte & 0x20) != 0)
|
|
{
|
|
UInt64 propertiesSize = 0;
|
|
RINOK(SzReadNumber(sd, &propertiesSize));
|
|
if (!Buf_Create(&coder->Props, (size_t)propertiesSize, alloc))
|
|
return SZ_ERROR_MEM;
|
|
RINOK(SzReadBytes(sd, coder->Props.data, (size_t)propertiesSize));
|
|
}
|
|
}
|
|
while ((mainByte & 0x80) != 0)
|
|
{
|
|
RINOK(SzReadByte(sd, &mainByte));
|
|
RINOK(SzSkeepDataSize(sd, (mainByte & 0xF)));
|
|
if ((mainByte & 0x10) != 0)
|
|
{
|
|
UInt32 n;
|
|
RINOK(SzReadNumber32(sd, &n));
|
|
RINOK(SzReadNumber32(sd, &n));
|
|
}
|
|
if ((mainByte & 0x20) != 0)
|
|
{
|
|
UInt64 propertiesSize = 0;
|
|
RINOK(SzReadNumber(sd, &propertiesSize));
|
|
RINOK(SzSkeepDataSize(sd, propertiesSize));
|
|
}
|
|
}
|
|
numInStreams += coder->NumInStreams;
|
|
numOutStreams += coder->NumOutStreams;
|
|
}
|
|
|
|
if (numOutStreams == 0)
|
|
return SZ_ERROR_UNSUPPORTED;
|
|
|
|
folder->NumBindPairs = numBindPairs = numOutStreams - 1;
|
|
MY_ALLOC(CSzBindPair, folder->BindPairs, (size_t)numBindPairs, alloc);
|
|
|
|
for (i = 0; i < numBindPairs; i++)
|
|
{
|
|
CSzBindPair *bp = folder->BindPairs + i;
|
|
RINOK(SzReadNumber32(sd, &bp->InIndex));
|
|
RINOK(SzReadNumber32(sd, &bp->OutIndex));
|
|
}
|
|
|
|
if (numInStreams < numBindPairs)
|
|
return SZ_ERROR_UNSUPPORTED;
|
|
|
|
folder->NumPackStreams = numPackStreams = numInStreams - numBindPairs;
|
|
MY_ALLOC(UInt32, folder->PackStreams, (size_t)numPackStreams, alloc);
|
|
|
|
if (numPackStreams == 1)
|
|
{
|
|
for (i = 0; i < numInStreams ; i++)
|
|
if (SzFolder_FindBindPairForInStream(folder, i) < 0)
|
|
break;
|
|
if (i == numInStreams)
|
|
return SZ_ERROR_UNSUPPORTED;
|
|
folder->PackStreams[0] = i;
|
|
}
|
|
else
|
|
for (i = 0; i < numPackStreams; i++)
|
|
{
|
|
RINOK(SzReadNumber32(sd, folder->PackStreams + i));
|
|
}
|
|
return SZ_OK;
|
|
}
|
|
|
|
static SRes SzReadUnpackInfo(
|
|
CSzData *sd,
|
|
UInt32 *numFolders,
|
|
CSzFolder **folders, /* for alloc */
|
|
ISzAlloc *alloc,
|
|
ISzAlloc *allocTemp)
|
|
{
|
|
UInt32 i;
|
|
RINOK(SzWaitAttribute(sd, k7zIdFolder));
|
|
RINOK(SzReadNumber32(sd, numFolders));
|
|
{
|
|
RINOK(SzReadSwitch(sd));
|
|
|
|
MY_ALLOC(CSzFolder, *folders, (size_t)*numFolders, alloc);
|
|
|
|
for (i = 0; i < *numFolders; i++)
|
|
SzFolder_Init((*folders) + i);
|
|
|
|
for (i = 0; i < *numFolders; i++)
|
|
{
|
|
RINOK(SzGetNextFolderItem(sd, (*folders) + i, alloc));
|
|
}
|
|
}
|
|
|
|
RINOK(SzWaitAttribute(sd, k7zIdCodersUnpackSize));
|
|
|
|
for (i = 0; i < *numFolders; i++)
|
|
{
|
|
UInt32 j;
|
|
CSzFolder *folder = (*folders) + i;
|
|
UInt32 numOutStreams = SzFolder_GetNumOutStreams(folder);
|
|
|
|
MY_ALLOC(UInt64, folder->UnpackSizes, (size_t)numOutStreams, alloc);
|
|
|
|
for (j = 0; j < numOutStreams; j++)
|
|
{
|
|
RINOK(SzReadNumber(sd, folder->UnpackSizes + j));
|
|
}
|
|
}
|
|
|
|
for (;;)
|
|
{
|
|
UInt64 type;
|
|
RINOK(SzReadID(sd, &type));
|
|
if (type == k7zIdEnd)
|
|
return SZ_OK;
|
|
if (type == k7zIdCRC)
|
|
{
|
|
SRes res;
|
|
Byte *crcsDefined = 0;
|
|
UInt32 *crcs = 0;
|
|
res = SzReadHashDigests(sd, *numFolders, &crcsDefined, &crcs, allocTemp);
|
|
if (res == SZ_OK)
|
|
{
|
|
for (i = 0; i < *numFolders; i++)
|
|
{
|
|
CSzFolder *folder = (*folders) + i;
|
|
folder->UnpackCRCDefined = crcsDefined[i];
|
|
folder->UnpackCRC = crcs[i];
|
|
}
|
|
}
|
|
IAlloc_Free(allocTemp, crcs);
|
|
IAlloc_Free(allocTemp, crcsDefined);
|
|
RINOK(res);
|
|
continue;
|
|
}
|
|
RINOK(SzSkeepData(sd));
|
|
}
|
|
}
|
|
|
|
static SRes SzReadSubStreamsInfo(
|
|
CSzData *sd,
|
|
UInt32 numFolders,
|
|
CSzFolder *folders,
|
|
UInt32 *numUnpackStreams,
|
|
UInt64 **unpackSizes,
|
|
Byte **digestsDefined,
|
|
UInt32 **digests,
|
|
ISzAlloc *allocTemp)
|
|
{
|
|
UInt64 type = 0;
|
|
UInt32 i;
|
|
UInt32 si = 0;
|
|
UInt32 numDigests = 0;
|
|
|
|
for (i = 0; i < numFolders; i++)
|
|
folders[i].NumUnpackStreams = 1;
|
|
*numUnpackStreams = numFolders;
|
|
|
|
for (;;)
|
|
{
|
|
RINOK(SzReadID(sd, &type));
|
|
if (type == k7zIdNumUnpackStream)
|
|
{
|
|
*numUnpackStreams = 0;
|
|
for (i = 0; i < numFolders; i++)
|
|
{
|
|
UInt32 numStreams;
|
|
RINOK(SzReadNumber32(sd, &numStreams));
|
|
folders[i].NumUnpackStreams = numStreams;
|
|
*numUnpackStreams += numStreams;
|
|
}
|
|
continue;
|
|
}
|
|
if (type == k7zIdCRC || type == k7zIdSize)
|
|
break;
|
|
if (type == k7zIdEnd)
|
|
break;
|
|
RINOK(SzSkeepData(sd));
|
|
}
|
|
|
|
if (*numUnpackStreams == 0)
|
|
{
|
|
*unpackSizes = 0;
|
|
*digestsDefined = 0;
|
|
*digests = 0;
|
|
}
|
|
else
|
|
{
|
|
*unpackSizes = (UInt64 *)IAlloc_Alloc(allocTemp, (size_t)*numUnpackStreams * sizeof(UInt64));
|
|
RINOM(*unpackSizes);
|
|
*digestsDefined = (Byte *)IAlloc_Alloc(allocTemp, (size_t)*numUnpackStreams * sizeof(Byte));
|
|
RINOM(*digestsDefined);
|
|
*digests = (UInt32 *)IAlloc_Alloc(allocTemp, (size_t)*numUnpackStreams * sizeof(UInt32));
|
|
RINOM(*digests);
|
|
}
|
|
|
|
for (i = 0; i < numFolders; i++)
|
|
{
|
|
/*
|
|
v3.13 incorrectly worked with empty folders
|
|
v4.07: we check that folder is empty
|
|
*/
|
|
UInt64 sum = 0;
|
|
UInt32 j;
|
|
UInt32 numSubstreams = folders[i].NumUnpackStreams;
|
|
if (numSubstreams == 0)
|
|
continue;
|
|
if (type == k7zIdSize)
|
|
for (j = 1; j < numSubstreams; j++)
|
|
{
|
|
UInt64 size;
|
|
RINOK(SzReadNumber(sd, &size));
|
|
(*unpackSizes)[si++] = size;
|
|
sum += size;
|
|
}
|
|
(*unpackSizes)[si++] = SzFolder_GetUnpackSize(folders + i) - sum;
|
|
}
|
|
if (type == k7zIdSize)
|
|
{
|
|
RINOK(SzReadID(sd, &type));
|
|
}
|
|
|
|
for (i = 0; i < *numUnpackStreams; i++)
|
|
{
|
|
(*digestsDefined)[i] = 0;
|
|
(*digests)[i] = 0;
|
|
}
|
|
|
|
|
|
for (i = 0; i < numFolders; i++)
|
|
{
|
|
UInt32 numSubstreams = folders[i].NumUnpackStreams;
|
|
if (numSubstreams != 1 || !folders[i].UnpackCRCDefined)
|
|
numDigests += numSubstreams;
|
|
}
|
|
|
|
|
|
si = 0;
|
|
for (;;)
|
|
{
|
|
if (type == k7zIdCRC)
|
|
{
|
|
int digestIndex = 0;
|
|
Byte *digestsDefined2 = 0;
|
|
UInt32 *digests2 = 0;
|
|
SRes res = SzReadHashDigests(sd, numDigests, &digestsDefined2, &digests2, allocTemp);
|
|
if (res == SZ_OK)
|
|
{
|
|
for (i = 0; i < numFolders; i++)
|
|
{
|
|
CSzFolder *folder = folders + i;
|
|
UInt32 numSubstreams = folder->NumUnpackStreams;
|
|
if (numSubstreams == 1 && folder->UnpackCRCDefined)
|
|
{
|
|
(*digestsDefined)[si] = 1;
|
|
(*digests)[si] = folder->UnpackCRC;
|
|
si++;
|
|
}
|
|
else
|
|
{
|
|
UInt32 j;
|
|
for (j = 0; j < numSubstreams; j++, digestIndex++)
|
|
{
|
|
(*digestsDefined)[si] = digestsDefined2[digestIndex];
|
|
(*digests)[si] = digests2[digestIndex];
|
|
si++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
IAlloc_Free(allocTemp, digestsDefined2);
|
|
IAlloc_Free(allocTemp, digests2);
|
|
RINOK(res);
|
|
}
|
|
else if (type == k7zIdEnd)
|
|
return SZ_OK;
|
|
else
|
|
{
|
|
RINOK(SzSkeepData(sd));
|
|
}
|
|
RINOK(SzReadID(sd, &type));
|
|
}
|
|
}
|
|
|
|
|
|
static SRes SzReadStreamsInfo(
|
|
CSzData *sd,
|
|
UInt64 *dataOffset,
|
|
CSzAr *p,
|
|
UInt32 *numUnpackStreams,
|
|
UInt64 **unpackSizes, /* allocTemp */
|
|
Byte **digestsDefined, /* allocTemp */
|
|
UInt32 **digests, /* allocTemp */
|
|
ISzAlloc *alloc,
|
|
ISzAlloc *allocTemp)
|
|
{
|
|
for (;;)
|
|
{
|
|
UInt64 type;
|
|
RINOK(SzReadID(sd, &type));
|
|
if ((UInt64)(int)type != type)
|
|
return SZ_ERROR_UNSUPPORTED;
|
|
switch((int)type)
|
|
{
|
|
case k7zIdEnd:
|
|
return SZ_OK;
|
|
case k7zIdPackInfo:
|
|
{
|
|
RINOK(SzReadPackInfo(sd, dataOffset, &p->NumPackStreams,
|
|
&p->PackSizes, &p->PackCRCsDefined, &p->PackCRCs, alloc));
|
|
break;
|
|
}
|
|
case k7zIdUnpackInfo:
|
|
{
|
|
RINOK(SzReadUnpackInfo(sd, &p->NumFolders, &p->Folders, alloc, allocTemp));
|
|
break;
|
|
}
|
|
case k7zIdSubStreamsInfo:
|
|
{
|
|
RINOK(SzReadSubStreamsInfo(sd, p->NumFolders, p->Folders,
|
|
numUnpackStreams, unpackSizes, digestsDefined, digests, allocTemp));
|
|
break;
|
|
}
|
|
default:
|
|
return SZ_ERROR_UNSUPPORTED;
|
|
}
|
|
}
|
|
}
|
|
|
|
size_t SzArEx_GetFileNameUtf16(const CSzArEx *p, size_t fileIndex, UInt16 *dest)
|
|
{
|
|
size_t len = p->FileNameOffsets[fileIndex + 1] - p->FileNameOffsets[fileIndex];
|
|
if (dest != 0)
|
|
{
|
|
size_t i;
|
|
const Byte *src = p->FileNames.data + (p->FileNameOffsets[fileIndex] * 2);
|
|
for (i = 0; i < len; i++)
|
|
dest[i] = GetUi16(src + i * 2);
|
|
}
|
|
return len;
|
|
}
|
|
|
|
static SRes SzReadFileNames(const Byte *p, size_t size, UInt32 numFiles, size_t *sizes)
|
|
{
|
|
UInt32 i;
|
|
size_t pos = 0;
|
|
for (i = 0; i < numFiles; i++)
|
|
{
|
|
sizes[i] = pos;
|
|
for (;;)
|
|
{
|
|
if (pos >= size)
|
|
return SZ_ERROR_ARCHIVE;
|
|
if (p[pos * 2] == 0 && p[pos * 2 + 1] == 0)
|
|
break;
|
|
pos++;
|
|
}
|
|
pos++;
|
|
}
|
|
sizes[i] = pos;
|
|
return (pos == size) ? SZ_OK : SZ_ERROR_ARCHIVE;
|
|
}
|
|
|
|
static SRes SzReadHeader2(
|
|
CSzArEx *p, /* allocMain */
|
|
CSzData *sd,
|
|
UInt64 **unpackSizes, /* allocTemp */
|
|
Byte **digestsDefined, /* allocTemp */
|
|
UInt32 **digests, /* allocTemp */
|
|
Byte **emptyStreamVector, /* allocTemp */
|
|
Byte **emptyFileVector, /* allocTemp */
|
|
Byte **lwtVector, /* allocTemp */
|
|
ISzAlloc *allocMain,
|
|
ISzAlloc *allocTemp)
|
|
{
|
|
UInt64 type;
|
|
UInt32 numUnpackStreams = 0;
|
|
UInt32 numFiles = 0;
|
|
CSzFileItem *files = 0;
|
|
UInt32 numEmptyStreams = 0;
|
|
UInt32 i;
|
|
|
|
RINOK(SzReadID(sd, &type));
|
|
|
|
if (type == k7zIdArchiveProperties)
|
|
{
|
|
RINOK(SzReadArchiveProperties(sd));
|
|
RINOK(SzReadID(sd, &type));
|
|
}
|
|
|
|
|
|
if (type == k7zIdMainStreamsInfo)
|
|
{
|
|
RINOK(SzReadStreamsInfo(sd,
|
|
&p->dataPos,
|
|
&p->db,
|
|
&numUnpackStreams,
|
|
unpackSizes,
|
|
digestsDefined,
|
|
digests, allocMain, allocTemp));
|
|
p->dataPos += p->startPosAfterHeader;
|
|
RINOK(SzReadID(sd, &type));
|
|
}
|
|
|
|
if (type == k7zIdEnd)
|
|
return SZ_OK;
|
|
if (type != k7zIdFilesInfo)
|
|
return SZ_ERROR_ARCHIVE;
|
|
|
|
RINOK(SzReadNumber32(sd, &numFiles));
|
|
p->db.NumFiles = numFiles;
|
|
|
|
MY_ALLOC(CSzFileItem, files, (size_t)numFiles, allocMain);
|
|
|
|
p->db.Files = files;
|
|
for (i = 0; i < numFiles; i++)
|
|
SzFile_Init(files + i);
|
|
|
|
for (;;)
|
|
{
|
|
UInt64 type;
|
|
UInt64 size;
|
|
RINOK(SzReadID(sd, &type));
|
|
if (type == k7zIdEnd)
|
|
break;
|
|
RINOK(SzReadNumber(sd, &size));
|
|
if (size > sd->Size)
|
|
return SZ_ERROR_ARCHIVE;
|
|
if ((UInt64)(int)type != type)
|
|
{
|
|
RINOK(SzSkeepDataSize(sd, size));
|
|
}
|
|
else
|
|
switch((int)type)
|
|
{
|
|
case k7zIdName:
|
|
{
|
|
size_t namesSize;
|
|
RINOK(SzReadSwitch(sd));
|
|
namesSize = (size_t)size - 1;
|
|
if ((namesSize & 1) != 0)
|
|
return SZ_ERROR_ARCHIVE;
|
|
if (!Buf_Create(&p->FileNames, namesSize, allocMain))
|
|
return SZ_ERROR_MEM;
|
|
MY_ALLOC(size_t, p->FileNameOffsets, numFiles + 1, allocMain);
|
|
memcpy(p->FileNames.data, sd->Data, namesSize);
|
|
RINOK(SzReadFileNames(sd->Data, namesSize >> 1, numFiles, p->FileNameOffsets))
|
|
RINOK(SzSkeepDataSize(sd, namesSize));
|
|
break;
|
|
}
|
|
case k7zIdEmptyStream:
|
|
{
|
|
RINOK(SzReadBoolVector(sd, numFiles, emptyStreamVector, allocTemp));
|
|
numEmptyStreams = 0;
|
|
for (i = 0; i < numFiles; i++)
|
|
if ((*emptyStreamVector)[i])
|
|
numEmptyStreams++;
|
|
break;
|
|
}
|
|
case k7zIdEmptyFile:
|
|
{
|
|
RINOK(SzReadBoolVector(sd, numEmptyStreams, emptyFileVector, allocTemp));
|
|
break;
|
|
}
|
|
case k7zIdWinAttributes:
|
|
{
|
|
RINOK(SzReadBoolVector2(sd, numFiles, lwtVector, allocTemp));
|
|
RINOK(SzReadSwitch(sd));
|
|
for (i = 0; i < numFiles; i++)
|
|
{
|
|
CSzFileItem *f = &files[i];
|
|
Byte defined = (*lwtVector)[i];
|
|
f->AttribDefined = defined;
|
|
f->Attrib = 0;
|
|
if (defined)
|
|
{
|
|
RINOK(SzReadUInt32(sd, &f->Attrib));
|
|
}
|
|
}
|
|
IAlloc_Free(allocTemp, *lwtVector);
|
|
*lwtVector = NULL;
|
|
break;
|
|
}
|
|
case k7zIdMTime:
|
|
{
|
|
RINOK(SzReadBoolVector2(sd, numFiles, lwtVector, allocTemp));
|
|
RINOK(SzReadSwitch(sd));
|
|
for (i = 0; i < numFiles; i++)
|
|
{
|
|
CSzFileItem *f = &files[i];
|
|
Byte defined = (*lwtVector)[i];
|
|
f->MTimeDefined = defined;
|
|
f->MTime.Low = f->MTime.High = 0;
|
|
if (defined)
|
|
{
|
|
RINOK(SzReadUInt32(sd, &f->MTime.Low));
|
|
RINOK(SzReadUInt32(sd, &f->MTime.High));
|
|
}
|
|
}
|
|
IAlloc_Free(allocTemp, *lwtVector);
|
|
*lwtVector = NULL;
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
RINOK(SzSkeepDataSize(sd, size));
|
|
}
|
|
}
|
|
}
|
|
|
|
{
|
|
UInt32 emptyFileIndex = 0;
|
|
UInt32 sizeIndex = 0;
|
|
for (i = 0; i < numFiles; i++)
|
|
{
|
|
CSzFileItem *file = files + i;
|
|
file->IsAnti = 0;
|
|
if (*emptyStreamVector == 0)
|
|
file->HasStream = 1;
|
|
else
|
|
file->HasStream = (Byte)((*emptyStreamVector)[i] ? 0 : 1);
|
|
if (file->HasStream)
|
|
{
|
|
file->IsDir = 0;
|
|
file->Size = (*unpackSizes)[sizeIndex];
|
|
file->Crc = (*digests)[sizeIndex];
|
|
file->CrcDefined = (Byte)(*digestsDefined)[sizeIndex];
|
|
sizeIndex++;
|
|
}
|
|
else
|
|
{
|
|
if (*emptyFileVector == 0)
|
|
file->IsDir = 1;
|
|
else
|
|
file->IsDir = (Byte)((*emptyFileVector)[emptyFileIndex] ? 0 : 1);
|
|
emptyFileIndex++;
|
|
file->Size = 0;
|
|
file->Crc = 0;
|
|
file->CrcDefined = 0;
|
|
}
|
|
}
|
|
}
|
|
return SzArEx_Fill(p, allocMain);
|
|
}
|
|
|
|
static SRes SzReadHeader(
|
|
CSzArEx *p,
|
|
CSzData *sd,
|
|
ISzAlloc *allocMain,
|
|
ISzAlloc *allocTemp)
|
|
{
|
|
UInt64 *unpackSizes = 0;
|
|
Byte *digestsDefined = 0;
|
|
UInt32 *digests = 0;
|
|
Byte *emptyStreamVector = 0;
|
|
Byte *emptyFileVector = 0;
|
|
Byte *lwtVector = 0;
|
|
SRes res = SzReadHeader2(p, sd,
|
|
&unpackSizes, &digestsDefined, &digests,
|
|
&emptyStreamVector, &emptyFileVector, &lwtVector,
|
|
allocMain, allocTemp);
|
|
IAlloc_Free(allocTemp, unpackSizes);
|
|
IAlloc_Free(allocTemp, digestsDefined);
|
|
IAlloc_Free(allocTemp, digests);
|
|
IAlloc_Free(allocTemp, emptyStreamVector);
|
|
IAlloc_Free(allocTemp, emptyFileVector);
|
|
IAlloc_Free(allocTemp, lwtVector);
|
|
return res;
|
|
}
|
|
|
|
static SRes SzReadAndDecodePackedStreams2(
|
|
ILookInStream *inStream,
|
|
CSzData *sd,
|
|
CBuf *outBuffer,
|
|
UInt64 baseOffset,
|
|
CSzAr *p,
|
|
UInt64 **unpackSizes,
|
|
Byte **digestsDefined,
|
|
UInt32 **digests,
|
|
ISzAlloc *allocTemp)
|
|
{
|
|
|
|
UInt32 numUnpackStreams = 0;
|
|
UInt64 dataStartPos;
|
|
CSzFolder *folder;
|
|
UInt64 unpackSize;
|
|
SRes res;
|
|
|
|
RINOK(SzReadStreamsInfo(sd, &dataStartPos, p,
|
|
&numUnpackStreams, unpackSizes, digestsDefined, digests,
|
|
allocTemp, allocTemp));
|
|
|
|
dataStartPos += baseOffset;
|
|
if (p->NumFolders != 1)
|
|
return SZ_ERROR_ARCHIVE;
|
|
|
|
folder = p->Folders;
|
|
unpackSize = SzFolder_GetUnpackSize(folder);
|
|
|
|
RINOK(LookInStream_SeekTo(inStream, dataStartPos));
|
|
|
|
if (!Buf_Create(outBuffer, (size_t)unpackSize, allocTemp))
|
|
return SZ_ERROR_MEM;
|
|
|
|
res = SzFolder_Decode(folder, p->PackSizes,
|
|
inStream, dataStartPos,
|
|
outBuffer->data, (size_t)unpackSize, allocTemp);
|
|
RINOK(res);
|
|
if (folder->UnpackCRCDefined)
|
|
if (CrcCalc(outBuffer->data, (size_t)unpackSize) != folder->UnpackCRC)
|
|
return SZ_ERROR_CRC;
|
|
return SZ_OK;
|
|
}
|
|
|
|
static SRes SzReadAndDecodePackedStreams(
|
|
ILookInStream *inStream,
|
|
CSzData *sd,
|
|
CBuf *outBuffer,
|
|
UInt64 baseOffset,
|
|
ISzAlloc *allocTemp)
|
|
{
|
|
CSzAr p;
|
|
UInt64 *unpackSizes = 0;
|
|
Byte *digestsDefined = 0;
|
|
UInt32 *digests = 0;
|
|
SRes res;
|
|
SzAr_Init(&p);
|
|
res = SzReadAndDecodePackedStreams2(inStream, sd, outBuffer, baseOffset,
|
|
&p, &unpackSizes, &digestsDefined, &digests,
|
|
allocTemp);
|
|
SzAr_Free(&p, allocTemp);
|
|
IAlloc_Free(allocTemp, unpackSizes);
|
|
IAlloc_Free(allocTemp, digestsDefined);
|
|
IAlloc_Free(allocTemp, digests);
|
|
return res;
|
|
}
|
|
|
|
static SRes SzArEx_Open2(
|
|
CSzArEx *p,
|
|
ILookInStream *inStream,
|
|
ISzAlloc *allocMain,
|
|
ISzAlloc *allocTemp)
|
|
{
|
|
Byte header[k7zStartHeaderSize];
|
|
Int64 startArcPos;
|
|
UInt64 nextHeaderOffset, nextHeaderSize;
|
|
size_t nextHeaderSizeT;
|
|
UInt32 nextHeaderCRC;
|
|
CBuf buffer;
|
|
SRes res;
|
|
|
|
startArcPos = 0;
|
|
RINOK(inStream->Seek(inStream, &startArcPos, SZ_SEEK_CUR));
|
|
|
|
RINOK(LookInStream_Read2(inStream, header, k7zStartHeaderSize, SZ_ERROR_NO_ARCHIVE));
|
|
|
|
if (!TestSignatureCandidate(header))
|
|
return SZ_ERROR_NO_ARCHIVE;
|
|
if (header[6] != k7zMajorVersion)
|
|
return SZ_ERROR_UNSUPPORTED;
|
|
|
|
nextHeaderOffset = GetUi64(header + 12);
|
|
nextHeaderSize = GetUi64(header + 20);
|
|
nextHeaderCRC = GetUi32(header + 28);
|
|
|
|
p->startPosAfterHeader = startArcPos + k7zStartHeaderSize;
|
|
|
|
if (CrcCalc(header + 12, 20) != GetUi32(header + 8))
|
|
return SZ_ERROR_CRC;
|
|
|
|
nextHeaderSizeT = (size_t)nextHeaderSize;
|
|
if (nextHeaderSizeT != nextHeaderSize)
|
|
return SZ_ERROR_MEM;
|
|
if (nextHeaderSizeT == 0)
|
|
return SZ_OK;
|
|
if (nextHeaderOffset > nextHeaderOffset + nextHeaderSize ||
|
|
nextHeaderOffset > nextHeaderOffset + nextHeaderSize + k7zStartHeaderSize)
|
|
return SZ_ERROR_NO_ARCHIVE;
|
|
|
|
{
|
|
Int64 pos = 0;
|
|
RINOK(inStream->Seek(inStream, &pos, SZ_SEEK_END));
|
|
if ((UInt64)pos < startArcPos + nextHeaderOffset ||
|
|
(UInt64)pos < startArcPos + k7zStartHeaderSize + nextHeaderOffset ||
|
|
(UInt64)pos < startArcPos + k7zStartHeaderSize + nextHeaderOffset + nextHeaderSize)
|
|
return SZ_ERROR_INPUT_EOF;
|
|
}
|
|
|
|
RINOK(LookInStream_SeekTo(inStream, startArcPos + k7zStartHeaderSize + nextHeaderOffset));
|
|
|
|
if (!Buf_Create(&buffer, nextHeaderSizeT, allocTemp))
|
|
return SZ_ERROR_MEM;
|
|
|
|
res = LookInStream_Read(inStream, buffer.data, nextHeaderSizeT);
|
|
if (res == SZ_OK)
|
|
{
|
|
res = SZ_ERROR_ARCHIVE;
|
|
if (CrcCalc(buffer.data, nextHeaderSizeT) == nextHeaderCRC)
|
|
{
|
|
CSzData sd;
|
|
UInt64 type;
|
|
sd.Data = buffer.data;
|
|
sd.Size = buffer.size;
|
|
res = SzReadID(&sd, &type);
|
|
if (res == SZ_OK)
|
|
{
|
|
if (type == k7zIdEncodedHeader)
|
|
{
|
|
CBuf outBuffer;
|
|
Buf_Init(&outBuffer);
|
|
res = SzReadAndDecodePackedStreams(inStream, &sd, &outBuffer, p->startPosAfterHeader, allocTemp);
|
|
if (res != SZ_OK)
|
|
Buf_Free(&outBuffer, allocTemp);
|
|
else
|
|
{
|
|
Buf_Free(&buffer, allocTemp);
|
|
buffer.data = outBuffer.data;
|
|
buffer.size = outBuffer.size;
|
|
sd.Data = buffer.data;
|
|
sd.Size = buffer.size;
|
|
res = SzReadID(&sd, &type);
|
|
}
|
|
}
|
|
}
|
|
if (res == SZ_OK)
|
|
{
|
|
if (type == k7zIdHeader)
|
|
res = SzReadHeader(p, &sd, allocMain, allocTemp);
|
|
else
|
|
res = SZ_ERROR_UNSUPPORTED;
|
|
}
|
|
}
|
|
}
|
|
Buf_Free(&buffer, allocTemp);
|
|
return res;
|
|
}
|
|
|
|
SRes SzArEx_Open(CSzArEx *p, ILookInStream *inStream, ISzAlloc *allocMain, ISzAlloc *allocTemp)
|
|
{
|
|
SRes res = SzArEx_Open2(p, inStream, allocMain, allocTemp);
|
|
if (res != SZ_OK)
|
|
SzArEx_Free(p, allocMain);
|
|
return res;
|
|
}
|
|
|
|
SRes SzArEx_Extract(
|
|
const CSzArEx *p,
|
|
ILookInStream *inStream,
|
|
UInt32 fileIndex,
|
|
UInt32 *blockIndex,
|
|
Byte **outBuffer,
|
|
size_t *outBufferSize,
|
|
size_t *offset,
|
|
size_t *outSizeProcessed,
|
|
ISzAlloc *allocMain,
|
|
ISzAlloc *allocTemp)
|
|
{
|
|
UInt32 folderIndex = p->FileIndexToFolderIndexMap[fileIndex];
|
|
SRes res = SZ_OK;
|
|
*offset = 0;
|
|
*outSizeProcessed = 0;
|
|
if (folderIndex == (UInt32)-1)
|
|
{
|
|
IAlloc_Free(allocMain, *outBuffer);
|
|
*blockIndex = folderIndex;
|
|
*outBuffer = 0;
|
|
*outBufferSize = 0;
|
|
return SZ_OK;
|
|
}
|
|
|
|
if (*outBuffer == 0 || *blockIndex != folderIndex)
|
|
{
|
|
CSzFolder *folder = p->db.Folders + folderIndex;
|
|
UInt64 unpackSizeSpec = SzFolder_GetUnpackSize(folder);
|
|
size_t unpackSize = (size_t)unpackSizeSpec;
|
|
UInt64 startOffset = SzArEx_GetFolderStreamPos(p, folderIndex, 0);
|
|
|
|
if (unpackSize != unpackSizeSpec)
|
|
return SZ_ERROR_MEM;
|
|
*blockIndex = folderIndex;
|
|
IAlloc_Free(allocMain, *outBuffer);
|
|
*outBuffer = 0;
|
|
|
|
RINOK(LookInStream_SeekTo(inStream, startOffset));
|
|
|
|
if (res == SZ_OK)
|
|
{
|
|
*outBufferSize = unpackSize;
|
|
if (unpackSize != 0)
|
|
{
|
|
*outBuffer = (Byte *)IAlloc_Alloc(allocMain, unpackSize);
|
|
if (*outBuffer == 0)
|
|
res = SZ_ERROR_MEM;
|
|
}
|
|
if (res == SZ_OK)
|
|
{
|
|
res = SzFolder_Decode(folder,
|
|
p->db.PackSizes + p->FolderStartPackStreamIndex[folderIndex],
|
|
inStream, startOffset,
|
|
*outBuffer, unpackSize, allocTemp);
|
|
if (res == SZ_OK)
|
|
{
|
|
if (folder->UnpackCRCDefined)
|
|
{
|
|
if (CrcCalc(*outBuffer, unpackSize) != folder->UnpackCRC)
|
|
res = SZ_ERROR_CRC;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (res == SZ_OK)
|
|
{
|
|
UInt32 i;
|
|
CSzFileItem *fileItem = p->db.Files + fileIndex;
|
|
*offset = 0;
|
|
for (i = p->FolderStartFileIndex[folderIndex]; i < fileIndex; i++)
|
|
*offset += (UInt32)p->db.Files[i].Size;
|
|
*outSizeProcessed = (size_t)fileItem->Size;
|
|
if (*offset + *outSizeProcessed > *outBufferSize)
|
|
return SZ_ERROR_FAIL;
|
|
if (fileItem->CrcDefined && CrcCalc(*outBuffer + *offset, *outSizeProcessed) != fileItem->Crc)
|
|
res = SZ_ERROR_CRC;
|
|
}
|
|
return res;
|
|
}
|