summaryrefslogtreecommitdiffstats
path: root/C/7zIn.c
diff options
context:
space:
mode:
Diffstat (limited to 'C/7zIn.c')
-rwxr-xr-xC/7zIn.c1402
1 files changed, 1402 insertions, 0 deletions
diff --git a/C/7zIn.c b/C/7zIn.c
new file mode 100755
index 0000000..f1a4492
--- /dev/null
+++ b/C/7zIn.c
@@ -0,0 +1,1402 @@
+/* 7zIn.c -- 7z Input functions
+2010-10-29 : Igor Pavlov : Public domain */
+
+#include <string.h>
+
+#include "7z.h"
+#include "7zCrc.h"
+#include "CpuArch.h"
+
+Byte k7zSignature[k7zSignatureSize] = {'7', 'z', 0xBC, 0xAF, 0x27, 0x1C};
+
+#define RINOM(x) { if ((x) == 0) return SZ_ERROR_MEM; }
+
+#define NUM_FOLDER_CODERS_MAX 32
+#define NUM_CODER_STREAMS_MAX 32
+
+void SzCoderInfo_Init(CSzCoderInfo *p)
+{
+ Buf_Init(&p->Props);
+}
+
+void SzCoderInfo_Free(CSzCoderInfo *p, ISzAlloc *alloc)
+{
+ Buf_Free(&p->Props, alloc);
+ SzCoderInfo_Init(p);
+}
+
+void SzFolder_Init(CSzFolder *p)
+{
+ p->Coders = 0;
+ p->BindPairs = 0;
+ p->PackStreams = 0;
+ p->UnpackSizes = 0;
+ p->NumCoders = 0;
+ p->NumBindPairs = 0;
+ p->NumPackStreams = 0;
+ p->UnpackCRCDefined = 0;
+ p->UnpackCRC = 0;
+ p->NumUnpackStreams = 0;
+}
+
+void SzFolder_Free(CSzFolder *p, ISzAlloc *alloc)
+{
+ UInt32 i;
+ if (p->Coders)
+ for (i = 0; i < p->NumCoders; i++)
+ SzCoderInfo_Free(&p->Coders[i], alloc);
+ IAlloc_Free(alloc, p->Coders);
+ IAlloc_Free(alloc, p->BindPairs);
+ IAlloc_Free(alloc, p->PackStreams);
+ IAlloc_Free(alloc, p->UnpackSizes);
+ SzFolder_Init(p);
+}
+
+UInt32 SzFolder_GetNumOutStreams(CSzFolder *p)
+{
+ UInt32 result = 0;
+ UInt32 i;
+ for (i = 0; i < p->NumCoders; i++)
+ result += p->Coders[i].NumOutStreams;
+ return result;
+}
+
+int SzFolder_FindBindPairForInStream(CSzFolder *p, UInt32 inStreamIndex)
+{
+ UInt32 i;
+ for (i = 0; i < p->NumBindPairs; i++)
+ if (p->BindPairs[i].InIndex == inStreamIndex)
+ return i;
+ return -1;
+}
+
+
+int SzFolder_FindBindPairForOutStream(CSzFolder *p, UInt32 outStreamIndex)
+{
+ UInt32 i;
+ for (i = 0; i < p->NumBindPairs; i++)
+ if (p->BindPairs[i].OutIndex == outStreamIndex)
+ return i;
+ return -1;
+}
+
+UInt64 SzFolder_GetUnpackSize(CSzFolder *p)
+{
+ int i = (int)SzFolder_GetNumOutStreams(p);
+ if (i == 0)
+ return 0;
+ for (i--; i >= 0; i--)
+ if (SzFolder_FindBindPairForOutStream(p, i) < 0)
+ return p->UnpackSizes[i];
+ /* throw 1; */
+ return 0;
+}
+
+void SzFile_Init(CSzFileItem *p)
+{
+ p->HasStream = 1;
+ p->IsDir = 0;
+ p->IsAnti = 0;
+ p->CrcDefined = 0;
+ p->MTimeDefined = 0;
+}
+
+void SzAr_Init(CSzAr *p)
+{
+ p->PackSizes = 0;
+ p->PackCRCsDefined = 0;
+ p->PackCRCs = 0;
+ p->Folders = 0;
+ p->Files = 0;
+ p->NumPackStreams = 0;
+ p->NumFolders = 0;
+ p->NumFiles = 0;
+}
+
+void SzAr_Free(CSzAr *p, ISzAlloc *alloc)
+{
+ UInt32 i;
+ if (p->Folders)
+ for (i = 0; i < p->NumFolders; i++)
+ SzFolder_Free(&p->Folders[i], alloc);
+
+ IAlloc_Free(alloc, p->PackSizes);
+ IAlloc_Free(alloc, p->PackCRCsDefined);
+ IAlloc_Free(alloc, p->PackCRCs);
+ IAlloc_Free(alloc, p->Folders);
+ IAlloc_Free(alloc, p->Files);
+ SzAr_Init(p);
+}
+
+
+void SzArEx_Init(CSzArEx *p)
+{
+ SzAr_Init(&p->db);
+ p->FolderStartPackStreamIndex = 0;
+ p->PackStreamStartPositions = 0;
+ p->FolderStartFileIndex = 0;
+ p->FileIndexToFolderIndexMap = 0;
+ p->FileNameOffsets = 0;
+ Buf_Init(&p->FileNames);
+}
+
+void SzArEx_Free(CSzArEx *p, ISzAlloc *alloc)
+{
+ IAlloc_Free(alloc, p->FolderStartPackStreamIndex);
+ IAlloc_Free(alloc, p->PackStreamStartPositions);
+ IAlloc_Free(alloc, p->FolderStartFileIndex);
+ IAlloc_Free(alloc, p->FileIndexToFolderIndexMap);
+
+ IAlloc_Free(alloc, p->FileNameOffsets);
+ Buf_Free(&p->FileNames, alloc);
+
+ SzAr_Free(&p->db, alloc);
+ SzArEx_Init(p);
+}
+
+/*
+UInt64 GetFolderPackStreamSize(int folderIndex, int streamIndex) const
+{
+ return PackSizes[FolderStartPackStreamIndex[folderIndex] + streamIndex];
+}
+
+UInt64 GetFilePackSize(int fileIndex) const
+{
+ int folderIndex = FileIndexToFolderIndexMap[fileIndex];
+ if (folderIndex >= 0)
+ {
+ const CSzFolder &folderInfo = Folders[folderIndex];
+ if (FolderStartFileIndex[folderIndex] == fileIndex)
+ return GetFolderFullPackSize(folderIndex);
+ }
+ return 0;
+}
+*/
+
+#define MY_ALLOC(T, p, size, alloc) { if ((size) == 0) p = 0; else \
+ if ((p = (T *)IAlloc_Alloc(alloc, (size) * sizeof(T))) == 0) return SZ_ERROR_MEM; }
+
+static SRes SzArEx_Fill(CSzArEx *p, ISzAlloc *alloc)
+{
+ UInt32 startPos = 0;
+ UInt64 startPosSize = 0;
+ UInt32 i;
+ UInt32 folderIndex = 0;
+ UInt32 indexInFolder = 0;
+ MY_ALLOC(UInt32, p->FolderStartPackStreamIndex, p->db.NumFolders, alloc);
+ for (i = 0; i < p->db.NumFolders; i++)
+ {
+ p->FolderStartPackStreamIndex[i] = startPos;
+ startPos += p->db.Folders[i].NumPackStreams;
+ }
+
+ MY_ALLOC(UInt64, p->PackStreamStartPositions, p->db.NumPackStreams, alloc);
+
+ for (i = 0; i < p->db.NumPackStreams; i++)
+ {
+ p->PackStreamStartPositions[i] = startPosSize;
+ startPosSize += p->db.PackSizes[i];
+ }
+
+ MY_ALLOC(UInt32, p->FolderStartFileIndex, p->db.NumFolders, alloc);
+ MY_ALLOC(UInt32, p->FileIndexToFolderIndexMap, p->db.NumFiles, alloc);
+
+ for (i = 0; i < p->db.NumFiles; i++)
+ {
+ CSzFileItem *file = p->db.Files + i;
+ int emptyStream = !file->HasStream;
+ if (emptyStream && indexInFolder == 0)
+ {
+ p->FileIndexToFolderIndexMap[i] = (UInt32)-1;
+ continue;
+ }
+ if (indexInFolder == 0)
+ {
+ /*
+ v3.13 incorrectly worked with empty folders
+ v4.07: Loop for skipping empty folders
+ */
+ for (;;)
+ {
+ if (folderIndex >= p->db.NumFolders)
+ return SZ_ERROR_ARCHIVE;
+ p->FolderStartFileIndex[folderIndex] = i;
+ if (p->db.Folders[folderIndex].NumUnpackStreams != 0)
+ break;
+ folderIndex++;
+ }
+ }
+ p->FileIndexToFolderIndexMap[i] = folderIndex;
+ if (emptyStream)
+ continue;
+ indexInFolder++;
+ if (indexInFolder >= p->db.Folders[folderIndex].NumUnpackStreams)
+ {
+ folderIndex++;
+ indexInFolder = 0;
+ }
+ }
+ return SZ_OK;
+}
+
+
+UInt64 SzArEx_GetFolderStreamPos(const CSzArEx *p, UInt32 folderIndex, UInt32 indexInFolder)
+{
+ return p->dataPos +
+ p->PackStreamStartPositions[p->FolderStartPackStreamIndex[folderIndex] + indexInFolder];
+}
+
+int SzArEx_GetFolderFullPackSize(const CSzArEx *p, UInt32 folderIndex, UInt64 *resSize)
+{
+ UInt32 packStreamIndex = p->FolderStartPackStreamIndex[folderIndex];
+ CSzFolder *folder = p->db.Folders + folderIndex;
+ UInt64 size = 0;
+ UInt32 i;
+ for (i = 0; i < folder->NumPackStreams; i++)
+ {
+ UInt64 t = size + p->db.PackSizes[packStreamIndex + i];
+ if (t < size) /* check it */
+ return SZ_ERROR_FAIL;
+ size = t;
+ }
+ *resSize = size;
+ return SZ_OK;
+}
+
+
+/*
+SRes SzReadTime(const CObjectVector<CBuf> &dataVector,
+ CObjectVector<CSzFileItem> &files, UInt64 type)
+{
+ CBoolVector boolVector;
+ RINOK(ReadBoolVector2(files.Size(), boolVector))
+
+ CStreamSwitch streamSwitch;
+ RINOK(streamSwitch.Set(this, &dataVector));
+
+ for (int i = 0; i < files.Size(); i++)
+ {
+ CSzFileItem &file = files[i];
+ CArchiveFileTime fileTime;
+ bool defined = boolVector[i];
+ if (defined)
+ {
+ UInt32 low, high;
+ RINOK(SzReadUInt32(low));
+ RINOK(SzReadUInt32(high));
+ fileTime.dwLowDateTime = low;
+ fileTime.dwHighDateTime = high;
+ }
+ switch(type)
+ {
+ case k7zIdCTime: file.IsCTimeDefined = defined; if (defined) file.CTime = fileTime; break;
+ case k7zIdATime: file.IsATimeDefined = defined; if (defined) file.ATime = fileTime; break;
+ case k7zIdMTime: file.IsMTimeDefined = defined; if (defined) file.MTime = fileTime; break;
+ }
+ }
+ return SZ_OK;
+}
+*/
+
+static int TestSignatureCandidate(Byte *testBytes)
+{
+ size_t i;
+ for (i = 0; i < k7zSignatureSize; i++)
+ if (testBytes[i] != k7zSignature[i])
+ return 0;
+ return 1;
+}
+
+typedef struct _CSzState
+{
+ Byte *Data;
+ size_t Size;
+}CSzData;
+
+static SRes SzReadByte(CSzData *sd, Byte *b)
+{
+ if (sd->Size == 0)
+ return SZ_ERROR_ARCHIVE;
+ sd->Size--;
+ *b = *sd->Data++;
+ return SZ_OK;
+}
+
+static SRes SzReadBytes(CSzData *sd, Byte *data, size_t size)
+{
+ size_t i;
+ for (i = 0; i < size; i++)
+ {
+ RINOK(SzReadByte(sd, data + i));
+ }
+ return SZ_OK;
+}
+
+static SRes SzReadUInt32(CSzData *sd, UInt32 *value)
+{
+ int i;
+ *value = 0;
+ for (i = 0; i < 4; i++)
+ {
+ Byte b;
+ RINOK(SzReadByte(sd, &b));
+ *value |= ((UInt32)(b) << (8 * i));
+ }
+ return SZ_OK;
+}
+
+static SRes SzReadNumber(CSzData *sd, UInt64 *value)
+{
+ Byte firstByte;
+ Byte mask = 0x80;
+ int i;
+ RINOK(SzReadByte(sd, &firstByte));
+ *value = 0;
+ for (i = 0; i < 8; i++)
+ {
+ Byte b;
+ if ((firstByte & mask) == 0)
+ {
+ UInt64 highPart = firstByte & (mask - 1);
+ *value += (highPart << (8 * i));
+ return SZ_OK;
+ }
+ RINOK(SzReadByte(sd, &b));
+ *value |= ((UInt64)b << (8 * i));
+ mask >>= 1;
+ }
+ return SZ_OK;
+}
+
+static SRes SzReadNumber32(CSzData *sd, UInt32 *value)
+{
+ UInt64 value64;
+ RINOK(SzReadNumber(sd, &value64));
+ if (value64 >= 0x80000000)
+ return SZ_ERROR_UNSUPPORTED;
+ if (value64 >= ((UInt64)(1) << ((sizeof(size_t) - 1) * 8 + 2)))
+ return SZ_ERROR_UNSUPPORTED;
+ *value = (UInt32)value64;
+ return SZ_OK;
+}
+
+static SRes SzReadID(CSzData *sd, UInt64 *value)
+{
+ return SzReadNumber(sd, value);
+}
+
+static SRes SzSkeepDataSize(CSzData *sd, UInt64 size)
+{
+ if (size > sd->Size)
+ return SZ_ERROR_ARCHIVE;
+ sd->Size -= (size_t)size;
+ sd->Data += (size_t)size;
+ return SZ_OK;
+}
+
+static SRes SzSkeepData(CSzData *sd)
+{
+ UInt64 size;
+ RINOK(SzReadNumber(sd, &size));
+ return SzSkeepDataSize(sd, size);
+}
+
+static SRes SzReadArchiveProperties(CSzData *sd)
+{
+ for (;;)
+ {
+ UInt64 type;
+ RINOK(SzReadID(sd, &type));
+ if (type == k7zIdEnd)
+ break;
+ SzSkeepData(sd);
+ }
+ return SZ_OK;
+}
+
+static SRes SzWaitAttribute(CSzData *sd, UInt64 attribute)
+{
+ for (;;)
+ {
+ UInt64 type;
+ RINOK(SzReadID(sd, &type));
+ if (type == attribute)
+ return SZ_OK;
+ if (type == k7zIdEnd)
+ return SZ_ERROR_ARCHIVE;
+ RINOK(SzSkeepData(sd));
+ }
+}
+
+static SRes SzReadBoolVector(CSzData *sd, size_t numItems, Byte **v, ISzAlloc *alloc)
+{
+ Byte b = 0;
+ Byte mask = 0;
+ size_t i;
+ MY_ALLOC(Byte, *v, numItems, alloc);
+ for (i = 0; i < numItems; i++)
+ {
+ if (mask == 0)
+ {
+ RINOK(SzReadByte(sd, &b));
+ mask = 0x80;
+ }
+ (*v)[i] = (Byte)(((b & mask) != 0) ? 1 : 0);
+ mask >>= 1;
+ }
+ return SZ_OK;
+}
+
+static SRes SzReadBoolVector2(CSzData *sd, size_t numItems, Byte **v, ISzAlloc *alloc)
+{
+ Byte allAreDefined;
+ size_t i;
+ RINOK(SzReadByte(sd, &allAreDefined));
+ if (allAreDefined == 0)
+ return SzReadBoolVector(sd, numItems, v, alloc);
+ MY_ALLOC(Byte, *v, numItems, alloc);
+ for (i = 0; i < numItems; i++)
+ (*v)[i] = 1;
+ return SZ_OK;
+}
+
+static SRes SzReadHashDigests(
+ CSzData *sd,
+ size_t numItems,
+ Byte **digestsDefined,
+ UInt32 **digests,
+ ISzAlloc *alloc)
+{
+ size_t i;
+ RINOK(SzReadBoolVector2(sd, numItems, digestsDefined, alloc));
+ MY_ALLOC(UInt32, *digests, numItems, alloc);
+ for (i = 0; i < numItems; i++)
+ if ((*digestsDefined)[i])
+ {
+ RINOK(SzReadUInt32(sd, (*digests) + i));
+ }
+ return SZ_OK;
+}
+
+static SRes SzReadPackInfo(
+ CSzData *sd,
+ UInt64 *dataOffset,
+ UInt32 *numPackStreams,
+ UInt64 **packSizes,
+ Byte **packCRCsDefined,
+ UInt32 **packCRCs,
+ ISzAlloc *alloc)
+{
+ UInt32 i;
+ RINOK(SzReadNumber(sd, dataOffset));
+ RINOK(SzReadNumber32(sd, numPackStreams));
+
+ RINOK(SzWaitAttribute(sd, k7zIdSize));
+
+ MY_ALLOC(UInt64, *packSizes, (size_t)*numPackStreams, alloc);
+
+ for (i = 0; i < *numPackStreams; i++)
+ {
+ RINOK(SzReadNumber(sd, (*packSizes) + i));
+ }
+
+ for (;;)
+ {
+ UInt64 type;
+ RINOK(SzReadID(sd, &type));
+ if (type == k7zIdEnd)
+ break;
+ if (type == k7zIdCRC)
+ {
+ RINOK(SzReadHashDigests(sd, (size_t)*numPackStreams, packCRCsDefined, packCRCs, alloc));
+ continue;
+ }
+ RINOK(SzSkeepData(sd));
+ }
+ if (*packCRCsDefined == 0)
+ {
+ MY_ALLOC(Byte, *packCRCsDefined, (size_t)*numPackStreams, alloc);
+ MY_ALLOC(UInt32, *packCRCs, (size_t)*numPackStreams, alloc);
+ for (i = 0; i < *numPackStreams; i++)
+ {
+ (*packCRCsDefined)[i] = 0;
+ (*packCRCs)[i] = 0;
+ }
+ }
+ return SZ_OK;
+}
+
+static SRes SzReadSwitch(CSzData *sd)
+{
+ Byte external;
+ 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;
+}