C++ CLimitedSequentialInStream类代码示例

STDMETHODIMP CHandler::Extract(const UInt32* indices, UInt32 numItems,
    Int32 _aTestMode, IArchiveExtractCallback *extractCallback)
{
  COM_TRY_BEGIN
  bool testMode = (_aTestMode != 0);
  bool allFilesMode = (numItems == UInt32(-1));
  if (allFilesMode)
    numItems = _sections.Size();
  if (numItems == 0)
    return S_OK;
  UInt64 totalSize = 0;
  UInt32 i;
  for (i = 0; i < numItems; i++)
    totalSize += _sections[allFilesMode ? i : indices[i]].GetPackSize();
  extractCallback->SetTotal(totalSize);

  UInt64 currentTotalSize = 0;
  UInt64 currentItemSize;
  
  NCompress::CCopyCoder *copyCoderSpec = new NCompress::CCopyCoder();
  CMyComPtr<ICompressCoder> copyCoder = copyCoderSpec;

  CLocalProgress *lps = new CLocalProgress;
  CMyComPtr<ICompressProgressInfo> progress = lps;
  lps->Init(extractCallback, false);

  CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
  CMyComPtr<ISequentialInStream> inStream(streamSpec);
  streamSpec->SetStream(_inStream);

  for (i = 0; i < numItems; i++, currentTotalSize += currentItemSize)
  {
    lps->InSize = lps->OutSize = currentTotalSize;
    RINOK(lps->SetCur());
    Int32 askMode = testMode ?
        NArchive::NExtract::NAskMode::kTest :
        NArchive::NExtract::NAskMode::kExtract;
    UInt32 index = allFilesMode ? i : indices[i];
    const CSection &item = _sections[index];
    currentItemSize = item.GetPackSize();

    CMyComPtr<ISequentialOutStream> outStream;
    RINOK(extractCallback->GetStream(index, &outStream, askMode));
    if (!testMode && !outStream)
      continue;
    
    RINOK(extractCallback->PrepareOperation(askMode));
    RINOK(_inStream->Seek(item.Pa, STREAM_SEEK_SET, NULL));
    streamSpec->Init(currentItemSize);
    RINOK(copyCoder->Code(inStream, outStream, NULL, NULL, progress));
    outStream.Release();
    RINOK(extractCallback->SetOperationResult(copyCoderSpec->TotalSize == currentItemSize ?
        NArchive::NExtract::NOperationResult::kOK:
        NArchive::NExtract::NOperationResult::kDataError));
  }
  return S_OK;
  COM_TRY_END
}

HRESULT CHandler::Open2(IInStream *stream)
{
  UInt64 archiveStartPos;
  RINOK(stream->Seek(0, STREAM_SEEK_SET, &archiveStartPos));

  const UInt32 kHeaderSize = 0x1C;
  Byte buf[kHeaderSize];
  RINOK(ReadStream_FALSE(stream, buf, kHeaderSize));

  UInt32 size = Get16(buf + 4);
  // UInt32 ver = Get16(buf + 6); // == 0
  if (Get32(buf) != 0x78617221 || size != kHeaderSize)
    return S_FALSE;

  UInt64 packSize = Get64(buf + 8);
  UInt64 unpackSize = Get64(buf + 0x10);
  // UInt32 checkSumAlogo = Get32(buf + 0x18);

  if (unpackSize >= kXmlSizeMax)
    return S_FALSE;

  _dataStartPos = archiveStartPos + kHeaderSize + packSize;

  char *ss = _xml.GetBuffer((int)unpackSize + 1);

  NCompress::NZlib::CDecoder *zlibCoderSpec = new NCompress::NZlib::CDecoder();
  CMyComPtr<ICompressCoder> zlibCoder = zlibCoderSpec;

  CLimitedSequentialInStream *inStreamLimSpec = new CLimitedSequentialInStream;
  CMyComPtr<ISequentialInStream> inStreamLim(inStreamLimSpec);
  inStreamLimSpec->SetStream(stream);
  inStreamLimSpec->Init(packSize);

  CBufPtrSeqOutStream *outStreamLimSpec = new CBufPtrSeqOutStream;
  CMyComPtr<ISequentialOutStream> outStreamLim(outStreamLimSpec);
  outStreamLimSpec->Init((Byte *)ss, (size_t)unpackSize);

  RINOK(zlibCoder->Code(inStreamLim, outStreamLim, NULL, NULL, NULL));

  if (outStreamLimSpec->GetPos() != (size_t)unpackSize)
    return S_FALSE;

  ss[(size_t)unpackSize] = 0;
  _xml.ReleaseBuffer();

  CXml xml;
  if (!xml.Parse(_xml))
    return S_FALSE;

  if (!xml.Root.IsTagged("xar") || xml.Root.SubItems.Size() != 1)
    return S_FALSE;
  const CXmlItem &toc = xml.Root.SubItems[0];
  if (!toc.IsTagged("toc"))
    return S_FALSE;
  if (!AddItem(toc, _files, -1))
    return S_FALSE;
  return S_OK;
}

ISequentialInStream* CInArchive::CreateLimitedStream(UInt64 position, UInt64 size)
{
  CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
  CMyComPtr<ISequentialInStream> stream(streamSpec);
  Stream->Seek(ArcInfo.Base + position, STREAM_SEEK_SET, NULL);
  streamSpec->SetStream(Stream);
  streamSpec->Init(size);
  return stream.Detach();
}

HRESULT CInArchive::ReadChunk(IInStream *inStream, UInt64 pos, UInt64 size)
{
  RINOK(inStream->Seek(pos, STREAM_SEEK_SET, NULL));
  CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
  CMyComPtr<ISequentialInStream> limitedStream(streamSpec);
  streamSpec->SetStream(inStream);
  streamSpec->Init(size);
  m_InStreamRef = limitedStream;
  _inBuffer.SetStream(limitedStream);
  _inBuffer.Init();
  return S_OK;
}

static HRESULT WriteRange(IInStream *inStream, ISequentialOutStream *outStream,
	UInt64 position, UInt64 size, ICompressProgressInfo *progress)
{
	RINOK(inStream->Seek(position, STREAM_SEEK_SET, 0));
	CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
	CMyComPtr<CLimitedSequentialInStream> inStreamLimited(streamSpec);
	streamSpec->SetStream(inStream);
	streamSpec->Init(size);

	NCompress::CCopyCoder *copyCoderSpec = new NCompress::CCopyCoder;
	CMyComPtr<ICompressCoder> copyCoder = copyCoderSpec;
	RINOK(copyCoder->Code(inStreamLimited, outStream, NULL, NULL, progress));
	return (copyCoderSpec->TotalSize == size ? S_OK : E_FAIL);
}

HRESULT CDecoder::Decode(CByteBuffer *outBuf, bool unpackSizeDefined, UInt32 unpackSize,
                         ISequentialOutStream *realOutStream, ICompressProgressInfo *progress,
                         UInt32 &packSizeRes, UInt32 &unpackSizeRes)
{
    CLimitedSequentialInStream *limitedStreamSpec = NULL;
    CMyComPtr<ISequentialInStream> limitedStream;
    packSizeRes = 0;
    unpackSizeRes = 0;

    if (Solid)
    {
        Byte temp[4];
        size_t processedSize = 4;
        RINOK(Read(temp, &processedSize));
        if (processedSize != 4)
            return S_FALSE;
        StreamPos += processedSize;
        UInt32 size = Get32(temp);
        if (unpackSizeDefined && size != unpackSize)
            return S_FALSE;
        unpackSize = size;
        unpackSizeDefined = true;
    }
    else
    {
        Byte temp[4];
        RINOK(ReadStream_FALSE(InputStream, temp, 4));
        StreamPos += 4;
        UInt32 size = Get32(temp);

        if ((size & kMask_IsCompressed) == 0)
        {
            if (unpackSizeDefined && size != unpackSize)
                return S_FALSE;
            packSizeRes = size;
            if (outBuf)
                outBuf->Alloc(size);

            UInt64 offset = 0;

            while (size > 0)
            {
                UInt32 curSize = (UInt32)MyMin((size_t)size, Buffer.Size());
                UInt32 processedSize;
                RINOK(InputStream->Read(Buffer, curSize, &processedSize));
                if (processedSize == 0)
                    return S_FALSE;
                if (outBuf)
                    memcpy((Byte *)*outBuf + (size_t)offset, Buffer, processedSize);
                offset += processedSize;
                size -= processedSize;
                StreamPos += processedSize;
                unpackSizeRes += processedSize;
                if (realOutStream)
                    RINOK(WriteStream(realOutStream, Buffer, processedSize));
                RINOK(progress->SetRatioInfo(&offset, &offset));
            }

            return S_OK;
        }

        size &= ~kMask_IsCompressed;
        packSizeRes = size;
        limitedStreamSpec = new CLimitedSequentialInStream;
        limitedStream = limitedStreamSpec;
        limitedStreamSpec->SetStream(InputStream);
        limitedStreamSpec->Init(size);
        {
            bool useFilter;
            RINOK(Init(limitedStream, useFilter));
        }
    }

    if (outBuf)
    {
        if (!unpackSizeDefined)
            return S_FALSE;
        outBuf->Alloc(unpackSize);
    }

    UInt64 inSizeStart = 0;
    if (_lzmaDecoder)
        inSizeStart = _lzmaDecoder->GetInputProcessedSize();

    // we don't allow files larger than 4 GB;
    if (!unpackSizeDefined)
        unpackSize = 0xFFFFFFFF;
    UInt32 offset = 0;

    for (;;)
    {
        size_t rem = unpackSize - offset;
        if (rem == 0)
            break;
        size_t size = Buffer.Size();
        if (size > rem)
            size = rem;
        RINOK(Read(Buffer, &size));
        if (size == 0)
        {
//.........这里部分代码省略.........

STDMETHODIMP CHandler::Extract(const UInt32* indices, UInt32 numItems,
    Int32 _aTestMode, IArchiveExtractCallback *extractCallback)
{
  COM_TRY_BEGIN
  bool testMode = (_aTestMode != 0);
  bool allFilesMode = (numItems == UInt32(-1));
  if (allFilesMode)
    numItems = _archive.Refs.Size();
  if(numItems == 0)
    return S_OK;
  UInt64 totalSize = 0;
  UInt32 i;
  for(i = 0; i < numItems; i++)
  {
    UInt32 index = (allFilesMode ? i : indices[i]);
    if (index < (UInt32)_archive.Refs.Size())
    {
      const CRef &ref = _archive.Refs[index];
      const CDir &item = ref.Dir->_subItems[ref.Index];
      totalSize += item.DataLength;
    }
    else
    {
      totalSize += _archive.GetBootItemSize(index - _archive.Refs.Size());
    }
  }
  extractCallback->SetTotal(totalSize);

  UInt64 currentTotalSize = 0;
  UInt64 currentItemSize;
  
  NCompress::CCopyCoder *copyCoderSpec = new NCompress::CCopyCoder();
  CMyComPtr<ICompressCoder> copyCoder = copyCoderSpec;

  CLocalProgress *lps = new CLocalProgress;
  CMyComPtr<ICompressProgressInfo> progress = lps;
  lps->Init(extractCallback, false);

  CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
  CMyComPtr<ISequentialInStream> inStream(streamSpec);
  streamSpec->SetStream(_inStream);

  for (i = 0; i < numItems; i++, currentTotalSize += currentItemSize)
  {
    lps->InSize = lps->OutSize = currentTotalSize;
    RINOK(lps->SetCur());
    currentItemSize = 0;
    CMyComPtr<ISequentialOutStream> realOutStream;
    Int32 askMode;
    askMode = testMode ? NArchive::NExtract::NAskMode::kTest : NArchive::NExtract::NAskMode::kExtract;
    UInt32 index = allFilesMode ? i : indices[i];
    
    RINOK(extractCallback->GetStream(index, &realOutStream, askMode));

    UInt64 blockIndex;
    if (index < (UInt32)_archive.Refs.Size())
    {
      const CRef &ref = _archive.Refs[index];
      const CDir &item = ref.Dir->_subItems[ref.Index];
      if(item.IsDir())
      {
        RINOK(extractCallback->PrepareOperation(askMode));
        RINOK(extractCallback->SetOperationResult(NArchive::NExtract::NOperationResult::kOK));
        continue;
      }
      currentItemSize = item.DataLength;
      blockIndex = item.ExtentLocation;
    }
    else
    {
      int bootIndex = index - _archive.Refs.Size();
      const CBootInitialEntry &be = _archive.BootEntries[bootIndex];
      currentItemSize = _archive.GetBootItemSize(bootIndex);
      blockIndex = be.LoadRBA;
    }
   
    if (!testMode && (!realOutStream))
      continue;
    RINOK(extractCallback->PrepareOperation(askMode));
    if (testMode)
    {
      RINOK(extractCallback->SetOperationResult(NArchive::NExtract::NOperationResult::kOK));
      continue;
    }
    RINOK(_inStream->Seek(blockIndex * _archive.BlockSize, STREAM_SEEK_SET, NULL));
    streamSpec->Init(currentItemSize);
    RINOK(copyCoder->Code(inStream, realOutStream, NULL, NULL, progress));
    realOutStream.Release();
    RINOK(extractCallback->SetOperationResult((copyCoderSpec->TotalSize == currentItemSize) ?
        NArchive::NExtract::NOperationResult::kOK:
        NArchive::NExtract::NOperationResult::kDataError));
  }
  return S_OK;
  COM_TRY_END
}

HRESULT CDecoder::Decode(CByteBuffer *outBuf, bool unpackSizeDefined, UInt32 unpackSize,
    ISequentialOutStream *realOutStream, ICompressProgressInfo *progress,
    UInt32 &packSizeRes, UInt32 &unpackSizeRes)
{
  CLimitedSequentialInStream *limitedStreamSpec = NULL;
  CMyComPtr<ISequentialInStream> limitedStream;
  packSizeRes = 0;
  unpackSizeRes = 0;

  if (Solid)
  {
    Byte temp[4];
    size_t processedSize = 4;
    RINOK(Read(temp, &processedSize));
    StreamPos += processedSize;
    if (processedSize != 4)
      return S_FALSE;
    UInt32 size = Get32(temp);
    if (unpackSizeDefined && size != unpackSize)
      return S_FALSE;
    unpackSize = size;
    unpackSizeDefined = true;
  }
  else
  {
    Byte temp[4];
    {
      size_t processedSize = 4;
      RINOK(ReadStream(InputStream, temp, &processedSize));
      StreamPos += processedSize;
      if (processedSize != 4)
        return S_FALSE;
    }
    UInt32 size = Get32(temp);

    if ((size & kMask_IsCompressed) == 0)
    {
      if (unpackSizeDefined && size != unpackSize)
        return S_FALSE;
      packSizeRes = size;
      if (outBuf)
        outBuf->Alloc(size);

      UInt64 offset = 0;
      
      while (size > 0)
      {
        UInt32 curSize = (UInt32)MyMin((size_t)size, Buffer.Size());
        UInt32 processedSize;
        RINOK(InputStream->Read(Buffer, curSize, &processedSize));
        if (processedSize == 0)
          return S_FALSE;
        if (outBuf)
          memcpy((Byte *)*outBuf + (size_t)offset, Buffer, processedSize);
        offset += processedSize;
        size -= processedSize;
        StreamPos += processedSize;
        unpackSizeRes += processedSize;
        if (realOutStream)
          RINOK(WriteStream(realOutStream, Buffer, processedSize));
        RINOK(progress->SetRatioInfo(&offset, &offset));
      }

      return S_OK;
    }
    
    size &= ~kMask_IsCompressed;
    packSizeRes = size;
    limitedStreamSpec = new CLimitedSequentialInStream;
    limitedStream = limitedStreamSpec;
    limitedStreamSpec->SetStream(InputStream);
    limitedStreamSpec->Init(size);
    {
      bool useFilter;
      RINOK(Init(limitedStream, useFilter));
    }
  }
  
  if (outBuf)
  {
    if (unpackSizeDefined)
      outBuf->Alloc(unpackSize);
  }

  const UInt64 inSizeStart = GetInputProcessedSize();

  // we don't allow files larger than 4 GB;
  if (!unpackSizeDefined)
    unpackSize = 0xFFFFFFFF;
  UInt32 offset = 0;

  HRESULT res = S_OK;

  for (;;)
  {
    size_t rem = unpackSize - offset;
    if (rem == 0)
      break;
    size_t size = Buffer.Size();
    if (size > rem)
//.........这里部分代码省略.........

HRESULT CUnpacker::Unpack(IInStream *inStream, const CResource &resource, bool lzxMode,
    ISequentialOutStream *outStream, ICompressProgressInfo *progress)
{
  RINOK(inStream->Seek(resource.Offset, STREAM_SEEK_SET, NULL));

  CLimitedSequentialInStream *limitedStreamSpec = new CLimitedSequentialInStream();
  CMyComPtr<ISequentialInStream> limitedStream = limitedStreamSpec;
  limitedStreamSpec->SetStream(inStream);

  if (!copyCoder)
  {
    copyCoderSpec = new NCompress::CCopyCoder;
    copyCoder = copyCoderSpec;
  }
  if (!resource.IsCompressed())
  {
    if (resource.PackSize != resource.UnpackSize)
      return S_FALSE;
    limitedStreamSpec->Init(resource.PackSize);
    return copyCoder->Code(limitedStreamSpec, outStream, NULL, NULL, progress);
  }
  if (resource.UnpackSize == 0)
    return S_OK;
  UInt64 numChunks = (resource.UnpackSize + kChunkSize - 1) >> kChunkSizeBits;
  unsigned entrySize = ((resource.UnpackSize > (UInt64)1 << 32) ? 8 : 4);
  UInt64 sizesBufSize64 = entrySize * (numChunks - 1);
  size_t sizesBufSize = (size_t)sizesBufSize64;
  if (sizesBufSize != sizesBufSize64)
    return E_OUTOFMEMORY;
  if (sizesBufSize > sizesBuf.GetCapacity())
  {
    sizesBuf.Free();
    sizesBuf.SetCapacity(sizesBufSize);
  }
  RINOK(ReadStream_FALSE(inStream, (Byte *)sizesBuf, sizesBufSize));
  const Byte *p = (const Byte *)sizesBuf;
  
  if (lzxMode && !lzxDecoder)
  {
    lzxDecoderSpec = new NCompress::NLzx::CDecoder(true);
    lzxDecoder = lzxDecoderSpec;
    RINOK(lzxDecoderSpec->SetParams(kChunkSizeBits));
  }
  
  UInt64 baseOffset = resource.Offset + sizesBufSize64;
  UInt64 outProcessed = 0;
  for (UInt32 i = 0; i < (UInt32)numChunks; i++)
  {
    UInt64 offset = 0;
    if (i > 0)
    {
      offset = (entrySize == 4) ? Get32(p): Get64(p);
      p += entrySize;
    }
    UInt64 nextOffset = resource.PackSize - sizesBufSize64;
    if (i + 1 < (UInt32)numChunks)
      nextOffset = (entrySize == 4) ? Get32(p): Get64(p);
    if (nextOffset < offset)
      return S_FALSE;

    RINOK(inStream->Seek(baseOffset + offset, STREAM_SEEK_SET, NULL));
    UInt64 inSize = nextOffset - offset;
    limitedStreamSpec->Init(inSize);

    if (progress)
    {
      RINOK(progress->SetRatioInfo(&offset, &outProcessed));
    }
    
    UInt32 outSize = kChunkSize;
    if (outProcessed + outSize > resource.UnpackSize)
      outSize = (UInt32)(resource.UnpackSize - outProcessed);
    UInt64 outSize64 = outSize;
    if (inSize == outSize)
    {
      RINOK(copyCoder->Code(limitedStreamSpec, outStream, NULL, &outSize64, NULL));
    }
    else
    {
      if (lzxMode)
      {
        lzxDecoderSpec->SetKeepHistory(false);
        RINOK(lzxDecoder->Code(limitedStreamSpec, outStream, NULL, &outSize64, NULL));
      }
      else
      {
        RINOK(xpressDecoder.Code(limitedStreamSpec, outStream, outSize));
      }
    }
    outProcessed += outSize;
  }
  return S_OK;
}

HRESULT CDecoder::Decode(
    DECL_EXTERNAL_CODECS_LOC_VARS
    IInStream *inStream,
    UInt64 startPos,
    const UInt64 *packSizes,
    const CFolder &folderInfo,
    ISequentialOutStream *outStream,
    ICompressProgressInfo *compressProgress
    #ifndef _NO_CRYPTO
    , ICryptoGetTextPassword *getTextPassword, bool &passwordIsDefined
    #endif
    #ifdef COMPRESS_MT
    , bool mtMode, UInt32 numThreads
    #endif
    )
{
  if (!folderInfo.CheckStructure())
    return E_NOTIMPL;
  #ifndef _NO_CRYPTO
  passwordIsDefined = false;
  #endif
  CObjectVector< CMyComPtr<ISequentialInStream> > inStreams;
  
  CLockedInStream lockedInStream;
  lockedInStream.Init(inStream);
  
  for (int j = 0; j < folderInfo.PackStreams.Size(); j++)
  {
    CLockedSequentialInStreamImp *lockedStreamImpSpec = new
        CLockedSequentialInStreamImp;
    CMyComPtr<ISequentialInStream> lockedStreamImp = lockedStreamImpSpec;
    lockedStreamImpSpec->Init(&lockedInStream, startPos);
    startPos += packSizes[j];
    
    CLimitedSequentialInStream *streamSpec = new
        CLimitedSequentialInStream;
    CMyComPtr<ISequentialInStream> inStream = streamSpec;
    streamSpec->SetStream(lockedStreamImp);
    streamSpec->Init(packSizes[j]);
    inStreams.Add(inStream);
  }
  
  int numCoders = folderInfo.Coders.Size();
  
  CBindInfoEx bindInfo;
  ConvertFolderItemInfoToBindInfo(folderInfo, bindInfo);
  bool createNewCoders;
  if (!_bindInfoExPrevIsDefined)
    createNewCoders = true;
  else
    createNewCoders = !AreBindInfoExEqual(bindInfo, _bindInfoExPrev);
  if (createNewCoders)
  {
    int i;
    _decoders.Clear();
    // _decoders2.Clear();
    
    _mixerCoder.Release();

    if (_multiThread)
    {
      _mixerCoderMTSpec = new NCoderMixer::CCoderMixer2MT;
      _mixerCoder = _mixerCoderMTSpec;
      _mixerCoderCommon = _mixerCoderMTSpec;
    }
    else
    {
      #ifdef _ST_MODE
      _mixerCoderSTSpec = new NCoderMixer::CCoderMixer2ST;
      _mixerCoder = _mixerCoderSTSpec;
      _mixerCoderCommon = _mixerCoderSTSpec;
      #endif
    }
    RINOK(_mixerCoderCommon->SetBindInfo(bindInfo));
    
    for (i = 0; i < numCoders; i++)
    {
      const CCoderInfo &coderInfo = folderInfo.Coders[i];

  
      CMyComPtr<ICompressCoder> decoder;
      CMyComPtr<ICompressCoder2> decoder2;
      RINOK(CreateCoder(
          EXTERNAL_CODECS_LOC_VARS
          coderInfo.MethodID, decoder, decoder2, false));
      CMyComPtr<IUnknown> decoderUnknown;
      if (coderInfo.IsSimpleCoder())
      {
        if (decoder == 0)
          return E_NOTIMPL;

        decoderUnknown = (IUnknown *)decoder;
        
        if (_multiThread)
          _mixerCoderMTSpec->AddCoder(decoder);
        #ifdef _ST_MODE
        else
          _mixerCoderSTSpec->AddCoder(decoder, false);
        #endif
      }
//.........这里部分代码省略.........

HRESULT UpdateArchive(IInStream *inStream, ISequentialOutStream *outStream,
    const CObjectVector<NArchive::NTar::CItemEx> &inputItems,
    const CObjectVector<CUpdateItem> &updateItems,
    UINT codePage,
    IArchiveUpdateCallback *updateCallback)
{
  COutArchive outArchive;
  outArchive.Create(outStream);
  outArchive.Pos = 0;

  CMyComPtr<IOutStream> outSeekStream;
  outStream->QueryInterface(IID_IOutStream, (void **)&outSeekStream);

  UInt64 complexity = 0;

  unsigned i;
  for (i = 0; i < updateItems.Size(); i++)
  {
    const CUpdateItem &ui = updateItems[i];
    if (ui.NewData)
      complexity += ui.Size;
    else
      complexity += inputItems[ui.IndexInArchive].GetFullSize();
  }

  RINOK(updateCallback->SetTotal(complexity));

  NCompress::CCopyCoder *copyCoderSpec = new NCompress::CCopyCoder;
  CMyComPtr<ICompressCoder> copyCoder = copyCoderSpec;

  CLocalProgress *lps = new CLocalProgress;
  CMyComPtr<ICompressProgressInfo> progress = lps;
  lps->Init(updateCallback, true);

  CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
  CMyComPtr<CLimitedSequentialInStream> inStreamLimited(streamSpec);
  streamSpec->SetStream(inStream);

  complexity = 0;

  for (i = 0; i < updateItems.Size(); i++)
  {
    lps->InSize = lps->OutSize = complexity;
    RINOK(lps->SetCur());

    const CUpdateItem &ui = updateItems[i];
    CItem item;
    if (ui.NewProps)
    {
      item.Mode = ui.Mode;
      item.Name = ui.Name;
      item.User = ui.User;
      item.Group = ui.Group;
      if (ui.IsDir)
      {
        item.LinkFlag = NFileHeader::NLinkFlag::kDirectory;
        item.PackSize = 0;
      }
      else
      {
        item.LinkFlag = NFileHeader::NLinkFlag::kNormal;
        item.PackSize = ui.Size;
      }
      item.MTime = ui.MTime;
      item.DeviceMajorDefined = false;
      item.DeviceMinorDefined = false;
      item.UID = 0;
      item.GID = 0;
      memcpy(item.Magic, NFileHeader::NMagic::kUsTar_00, 8);
    }
    else
      item = inputItems[ui.IndexInArchive];

    AString symLink;
    if (ui.NewData || ui.NewProps)
    {
      RINOK(GetPropString(updateCallback, ui.IndexInClient, kpidSymLink, symLink, codePage, true));
      if (!symLink.IsEmpty())
      {
        item.LinkFlag = NFileHeader::NLinkFlag::kSymLink;
        item.LinkName = symLink;
      }
    }

    if (ui.NewData)
    {
      item.SparseBlocks.Clear();
      item.PackSize = ui.Size;
      item.Size = ui.Size;
      if (ui.Size == (UInt64)(Int64)-1)
        return E_INVALIDARG;

      CMyComPtr<ISequentialInStream> fileInStream;

      bool needWrite = true;
      if (!symLink.IsEmpty())
      {
        item.PackSize = 0;
        item.Size = 0;
      }
//.........这里部分代码省略.........

HRESULT CHandler::Open2(IInStream *stream)
{
  const UInt32 kHeaderSize = 0x1C;
  Byte buf[kHeaderSize];
  RINOK(ReadStream_FALSE(stream, buf, kHeaderSize));

  UInt32 size = Get16(buf + 4);
  // UInt32 ver = Get16(buf + 6); // == 1
  if (Get32(buf) != 0x78617221 || size != kHeaderSize)
    return S_FALSE;

  UInt64 packSize = Get64(buf + 8);
  UInt64 unpackSize = Get64(buf + 0x10);

  // _checkSumAlgo = Get32(buf + 0x18);

  if (packSize >= kXmlPackSizeMax ||
      unpackSize >= kXmlSizeMax)
    return S_FALSE;

  _dataStartPos = kHeaderSize + packSize;
  _phySize = _dataStartPos;

  _xml.Alloc((size_t)unpackSize + 1);
  _xmlLen = (size_t)unpackSize;
  
  NCompress::NZlib::CDecoder *zlibCoderSpec = new NCompress::NZlib::CDecoder();
  CMyComPtr<ICompressCoder> zlibCoder = zlibCoderSpec;

  CLimitedSequentialInStream *inStreamLimSpec = new CLimitedSequentialInStream;
  CMyComPtr<ISequentialInStream> inStreamLim(inStreamLimSpec);
  inStreamLimSpec->SetStream(stream);
  inStreamLimSpec->Init(packSize);

  CBufPtrSeqOutStream *outStreamLimSpec = new CBufPtrSeqOutStream;
  CMyComPtr<ISequentialOutStream> outStreamLim(outStreamLimSpec);
  outStreamLimSpec->Init(_xml, (size_t)unpackSize);

  RINOK(zlibCoder->Code(inStreamLim, outStreamLim, NULL, NULL, NULL));

  if (outStreamLimSpec->GetPos() != (size_t)unpackSize)
    return S_FALSE;

  _xml[(size_t)unpackSize] = 0;
  if (strlen((const char *)(const Byte *)_xml) != unpackSize) return S_FALSE;

  CXml xml;
  if (!xml.Parse((const char *)(const Byte *)_xml))
    return S_FALSE;
  
  if (!xml.Root.IsTagged("xar") || xml.Root.SubItems.Size() != 1)
    return S_FALSE;
  const CXmlItem &toc = xml.Root.SubItems[0];
  if (!toc.IsTagged("toc"))
    return S_FALSE;
  if (!AddItem(toc, _files, -1))
    return S_FALSE;

  UInt64 totalPackSize = 0;
  unsigned numMainFiles = 0;
  
  FOR_VECTOR (i, _files)
  {
    const CFile &file = _files[i];
    file.UpdateTotalPackSize(totalPackSize);
    if (file.Name == "Payload" || file.Name == "Content")
    {
      _mainSubfile = i;
      numMainFiles++;
    }
    else if (file.Name == "PackageInfo")
      _is_pkg = true;
  }

  if (numMainFiles > 1)
    _mainSubfile = -1;
  
  _phySize = _dataStartPos + totalPackSize;

  return S_OK;
}

STDMETHODIMP CHandler::Extract(const UInt32 *indices, UInt32 numItems,
    Int32 testModeSpec, IArchiveExtractCallback *extractCallback)
{
  COM_TRY_BEGIN
  bool allFilesMode = (numItems == (UInt32)-1);

  if (allFilesMode)
    numItems = m_Database.NewFormat ? 1:
      (m_Database.LowLevel ?
      m_Database.Items.Size():
      m_Database.Indices.Size());
  if (numItems == 0)
    return S_OK;
  bool testMode = (testModeSpec != 0);

  UInt64 currentTotalSize = 0;

  NCompress::CCopyCoder *copyCoderSpec = new NCompress::CCopyCoder();
  CMyComPtr<ICompressCoder> copyCoder = copyCoderSpec;
  UInt32 i;

  CLocalProgress *lps = new CLocalProgress;
  CMyComPtr<ICompressProgressInfo> progress = lps;
  lps->Init(extractCallback, false);

  CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
  CMyComPtr<ISequentialInStream> inStream(streamSpec);
  streamSpec->SetStream(m_Stream);

  if (m_Database.LowLevel)
  {
    UInt64 currentItemSize = 0;
    UInt64 totalSize = 0;
    if (m_Database.NewFormat)
      totalSize = m_Database.NewFormatString.Length();
    else
      for (i = 0; i < numItems; i++)
        totalSize += m_Database.Items[allFilesMode ? i : indices[i]].Size;
    extractCallback->SetTotal(totalSize);
    
    for (i = 0; i < numItems; i++, currentTotalSize += currentItemSize)
    {
      currentItemSize = 0;
      lps->InSize = currentTotalSize; // Change it
      lps->OutSize = currentTotalSize;

      RINOK(lps->SetCur());
      CMyComPtr<ISequentialOutStream> realOutStream;
      Int32 askMode= testMode ?
          NExtract::NAskMode::kTest :
          NExtract::NAskMode::kExtract;
      Int32 index = allFilesMode ? i : indices[i];
      RINOK(extractCallback->GetStream(index, &realOutStream, askMode));

      if (m_Database.NewFormat)
      {
        if (index != 0)
          return E_FAIL;
        if (!testMode && !realOutStream)
          continue;
        if (!testMode)
        {
          UInt32 size = m_Database.NewFormatString.Length();
          RINOK(WriteStream(realOutStream, (const char *)m_Database.NewFormatString, size));
        }
        RINOK(extractCallback->SetOperationResult(NExtract::NOperationResult::kOK));
        continue;
      }
      const CItem &item = m_Database.Items[index];
      
      currentItemSize = item.Size;
      
      if (!testMode && !realOutStream)
        continue;
      RINOK(extractCallback->PrepareOperation(askMode));
      if (item.Section != 0)
      {
        RINOK(extractCallback->SetOperationResult(NExtract::NOperationResult::kUnSupportedMethod));
        continue;
      }

      if (testMode)
      {
        RINOK(extractCallback->SetOperationResult(NExtract::NOperationResult::kOK));
        continue;
      }
      
      RINOK(m_Stream->Seek(m_Database.ContentOffset + item.Offset, STREAM_SEEK_SET, NULL));
      streamSpec->Init(item.Size);
      
      RINOK(copyCoder->Code(inStream, realOutStream, NULL, NULL, progress));
      realOutStream.Release();
      RINOK(extractCallback->SetOperationResult((copyCoderSpec->TotalSize == item.Size) ?
          NExtract::NOperationResult::kOK:
          NExtract::NOperationResult::kDataError));
    }
    return S_OK;
  }
  
  UInt64 lastFolderIndex = ((UInt64)0 - 1);
//.........这里部分代码省略.........

STDMETHODIMP CHandler::Extract(const UInt32 *indices, UInt32 numItems,
    Int32 testMode, IArchiveExtractCallback *extractCallback)
{
  COM_TRY_BEGIN
  bool allFilesMode = (numItems == (UInt32)(Int32)-1);
  if (allFilesMode)
    numItems = _archive.Refs.Size();
  if (numItems == 0)
    return S_OK;
  UInt64 totalSize = 0;
  UInt32 i;
  for (i = 0; i < numItems; i++)
  {
    UInt32 index = (allFilesMode ? i : indices[i]);
    if (index < (UInt32)_archive.Refs.Size())
    {
      const CRef &ref = _archive.Refs[index];
      const CDir &item = ref.Dir->_subItems[ref.Index];
      if (!item.IsDir())
        totalSize += ref.TotalSize;
    }
    else
      totalSize += _archive.GetBootItemSize(index - _archive.Refs.Size());
  }
  extractCallback->SetTotal(totalSize);

  UInt64 currentTotalSize = 0;
  UInt64 currentItemSize;
  
  NCompress::CCopyCoder *copyCoderSpec = new NCompress::CCopyCoder();
  CMyComPtr<ICompressCoder> copyCoder = copyCoderSpec;

  CLocalProgress *lps = new CLocalProgress;
  CMyComPtr<ICompressProgressInfo> progress = lps;
  lps->Init(extractCallback, false);

  CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
  CMyComPtr<ISequentialInStream> inStream(streamSpec);
  streamSpec->SetStream(_stream);

  for (i = 0; i < numItems; i++, currentTotalSize += currentItemSize)
  {
    lps->InSize = lps->OutSize = currentTotalSize;
    RINOK(lps->SetCur());
    currentItemSize = 0;
    CMyComPtr<ISequentialOutStream> realOutStream;
    Int32 askMode = testMode ?
        NExtract::NAskMode::kTest :
        NExtract::NAskMode::kExtract;
    UInt32 index = allFilesMode ? i : indices[i];
    
    RINOK(extractCallback->GetStream(index, &realOutStream, askMode));

    UInt64 blockIndex;
    if (index < (UInt32)_archive.Refs.Size())
    {
      const CRef &ref = _archive.Refs[index];
      const CDir &item = ref.Dir->_subItems[ref.Index];
      if (item.IsDir())
      {
        RINOK(extractCallback->PrepareOperation(askMode));
        RINOK(extractCallback->SetOperationResult(NExtract::NOperationResult::kOK));
        continue;
      }
      currentItemSize = ref.TotalSize;
      blockIndex = item.ExtentLocation;
    }
    else
    {
      unsigned bootIndex = index - _archive.Refs.Size();
      const CBootInitialEntry &be = _archive.BootEntries[bootIndex];
      currentItemSize = _archive.GetBootItemSize(bootIndex);
      blockIndex = be.LoadRBA;
    }
   

    if (!testMode && !realOutStream)
      continue;

    RINOK(extractCallback->PrepareOperation(askMode));

    bool isOK = true;
    if (index < (UInt32)_archive.Refs.Size())
    {
      const CRef &ref = _archive.Refs[index];
      UInt64 offset = 0;
      for (UInt32 e = 0; e < ref.NumExtents; e++)
      {
        lps->InSize = lps->OutSize = currentTotalSize + offset;
        const CDir &item2 = ref.Dir->_subItems[ref.Index + e];
        RINOK(_stream->Seek((UInt64)item2.ExtentLocation * kBlockSize, STREAM_SEEK_SET, NULL));
        streamSpec->Init(item2.Size);
        RINOK(copyCoder->Code(inStream, realOutStream, NULL, NULL, progress));
        if (copyCoderSpec->TotalSize != item2.Size)
        {
          isOK = false;
          break;
        }
        offset += item2.Size;
      }
//.........这里部分代码省略.........

//.........这里部分代码省略.........
  for(i = 0; i < updateItems.Size(); i++)
  {
    RINOK(updateCallback->SetCompleted(&complexity));

    CLocalProgress *localProgressSpec = new CLocalProgress;
    CMyComPtr<ICompressProgressInfo> localProgress = localProgressSpec;
    localProgressSpec->Init(updateCallback, true);
  
    CLocalCompressProgressInfo *localCompressProgressSpec = new CLocalCompressProgressInfo;
    CMyComPtr<ICompressProgressInfo> compressProgress = localCompressProgressSpec;

    localCompressProgressSpec->Init(localProgress, &complexity, NULL);

    const CUpdateItemInfo &updateItem = updateItems[i];
    CItem item;
    if (updateItem.NewProperties)
    {
      item.Mode = 0777;
      item.Name = (updateItem.Name);
      if (updateItem.IsDirectory)
      {
         item.LinkFlag = NFileHeader::NLinkFlag::kDirectory;
         item.Size = 0;
      }
      else
      {
         item.LinkFlag = NFileHeader::NLinkFlag::kNormal;
         item.Size = updateItem.Size;
      }
      item.ModificationTime = updateItem.Time;
      item.DeviceMajorDefined = false;
      item.DeviceMinorDefined = false;
      item.UID = 0;
      item.GID = 0;
      memmove(item.Magic, NFileHeader::NMagic::kEmpty, 8);
    }
    else
    {
      const CItemEx &existItemInfo = inputItems[updateItem.IndexInArchive];
      item = existItemInfo;
    }
    if (updateItem.NewData)
    {
      item.Size = updateItem.Size;
      if (item.Size == UInt64(Int64(-1)))
        return E_INVALIDARG;
    }
    else
    {
      const CItemEx &existItemInfo = inputItems[updateItem.IndexInArchive];
      item.Size = existItemInfo.Size;
    }
  
    if (updateItem.NewData)
    {
      CMyComPtr<ISequentialInStream> fileInStream;
      HRESULT res = updateCallback->GetStream(updateItem.IndexInClient, &fileInStream);
      if (res != S_FALSE)
      {
        RINOK(res);
        RINOK(outArchive.WriteHeader(item));
        if (!updateItem.IsDirectory)
        {
          UInt64 totalSize;
          RINOK(CopyBlock(fileInStream, outStream, compressProgress, &totalSize));
          if (totalSize != item.Size)
            return E_FAIL;
          RINOK(outArchive.FillDataResidual(item.Size));
        }
      }
      complexity += updateItem.Size;
      RINOK(updateCallback->SetOperationResult(
          NArchive::NUpdate::NOperationResult::kOK));
    }
    else
    {
      CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
      CMyComPtr<CLimitedSequentialInStream> inStreamLimited(streamSpec);
      const CItemEx &existItemInfo = inputItems[updateItem.IndexInArchive];
      if (updateItem.NewProperties)
      {
        RINOK(outArchive.WriteHeader(item));
        RINOK(inStream->Seek(existItemInfo.GetDataPosition(), 
            STREAM_SEEK_SET, NULL));
        streamSpec->Init(inStream, existItemInfo.Size);
      }
      else
      {
        RINOK(inStream->Seek(existItemInfo.HeaderPosition, 
            STREAM_SEEK_SET, NULL));
        streamSpec->Init(inStream, existItemInfo.GetFullSize());
      }
      RINOK(CopyBlock(inStreamLimited, outStream, compressProgress));
      RINOK(outArchive.FillDataResidual(existItemInfo.Size));
      complexity += existItemInfo.GetFullSize();
    }
    complexity += kOneItemComplexity;
  }
  return outArchive.WriteFinishHeader();
}