C++ CMyComPtr::GetStream方法代码示例

HRESULT OpenArchive(
    CCodecs *codecs,
    const UString &fileName, 
    IInArchive **archive0, 
    IInArchive **archive1, 
    int &formatIndex0,
    int &formatIndex1,
    UString &defaultItemName0,
    UString &defaultItemName1,
    IArchiveOpenCallback *openArchiveCallback)
{
  HRESULT result = OpenArchive(codecs, fileName, 
      archive0, formatIndex0, defaultItemName0, openArchiveCallback);
  RINOK(result);
  CMyComPtr<IInArchiveGetStream> getStream;
  result = (*archive0)->QueryInterface(IID_IInArchiveGetStream, (void **)&getStream);
  if (result != S_OK || getStream == 0)
    return S_OK;

  CMyComPtr<ISequentialInStream> subSeqStream;
  result = getStream->GetStream(0, &subSeqStream);
  if (result != S_OK)
    return S_OK;

  CMyComPtr<IInStream> subStream;
  if (subSeqStream.QueryInterface(IID_IInStream, &subStream) != S_OK)
    return S_OK;
  if (!subStream)
    return S_OK;

  UInt32 numItems;
  RINOK((*archive0)->GetNumberOfItems(&numItems));
  if (numItems < 1)
    return S_OK;

  UString subPath;
  RINOK(GetArchiveItemPath(*archive0, 0, subPath))
  if (subPath.IsEmpty())
  {
    MakeDefaultName(defaultItemName0);
    subPath = defaultItemName0;
    const CArcInfoEx &format = codecs->Formats[formatIndex0];
    if (format.Name.CompareNoCase(L"7z") == 0)
    {
      if (subPath.Right(3).CompareNoCase(L".7z") != 0)
        subPath += L".7z";
    }
  }
  else
    subPath = ExtractFileNameFromPath(subPath);

  CMyComPtr<IArchiveOpenSetSubArchiveName> setSubArchiveName;
  openArchiveCallback->QueryInterface(IID_IArchiveOpenSetSubArchiveName, (void **)&setSubArchiveName);
  if (setSubArchiveName)
    setSubArchiveName->SetSubArchiveName(subPath);

  result = OpenArchive(codecs, subStream, subPath,
      archive1, formatIndex1, defaultItemName1, openArchiveCallback);
  return S_OK;
}

STDMETHODIMP CAgentFolder::GetStream(UInt32 index, ISequentialInStream **stream)
{
  CMyComPtr<IInArchiveGetStream> getStream;
  _agentSpec->GetArchive()->QueryInterface(IID_IInArchiveGetStream, (void **)&getStream);
  if (!getStream)
    return S_OK;

  const CProxyFolder *folder;
  UInt32 realIndex;
  if (_flatMode)
  {
    const CProxyItem &item = _items[index];
    folder = item.Folder;
    realIndex = item.Index;
  }
  else
  {
    folder = _proxyFolderItem;
    realIndex = index;
  }

  UInt32 indexInArchive;
  if (realIndex < (UInt32)folder->Folders.Size())
  {
    const CProxyFolder &item = folder->Folders[realIndex];
    if (!item.IsLeaf)
      return S_OK;
    indexInArchive = item.Index;
  }
  else
    indexInArchive = folder->Files[realIndex - folder->Folders.Size()].Index;
  return getStream->GetStream(indexInArchive, stream);
}

HRESULT CCabFolderOutStream::OpenFile()
{
  Int32 askMode = (*m_ExtractStatuses)[m_CurrentIndex] ? (m_TestMode ?
      NExtract::NAskMode::kTest :
      NExtract::NAskMode::kExtract) :
      NExtract::NAskMode::kSkip;
  RINOK(m_ExtractCallback->GetStream(m_StartIndex + m_CurrentIndex, &m_RealOutStream, askMode));
  if (!m_RealOutStream && !m_TestMode)
    askMode = NArchive::NExtract::NAskMode::kSkip;
  return m_ExtractCallback->PrepareOperation(askMode);
}

HRESULT CHandler::Open2(IInStream *stream, IArchiveOpenCallback *callback)
{
  Close();
  if (!callback)
    return S_FALSE;

  CMyComPtr<IArchiveOpenVolumeCallback> volumeCallback;
  callback->QueryInterface(IID_IArchiveOpenVolumeCallback, (void **)&volumeCallback);
  if (!volumeCallback)
    return S_FALSE;
  
  UString name;
  {
    NCOM::CPropVariant prop;
    RINOK(volumeCallback->GetProperty(kpidName, &prop));
    if (prop.vt != VT_BSTR)
      return S_FALSE;
    name = prop.bstrVal;
  }
  
  int dotPos = name.ReverseFind_Dot();
  const UString prefix = name.Left(dotPos + 1);
  const UString ext = name.Ptr(dotPos + 1);
  UString ext2 = ext;
  ext2.MakeLower_Ascii();
  
  CSeqName seqName;
  
  unsigned numLetters = 2;
  bool splitStyle = false;
  
  if (ext2.Len() >= 2 && StringsAreEqual_Ascii(ext2.RightPtr(2), "aa"))
  {
    splitStyle = true;
    while (numLetters < ext2.Len())
    {
      if (ext2[ext2.Len() - numLetters - 1] != 'a')
        break;
      numLetters++;
    }
  }
  else if (ext.Len() >= 2 && StringsAreEqual_Ascii(ext2.RightPtr(2), "01"))
  {
    while (numLetters < ext2.Len())
    {
      if (ext2[ext2.Len() - numLetters - 1] != '0')
        break;
      numLetters++;
    }
    if (numLetters != ext.Len())
      return S_FALSE;
  }
  else
    return S_FALSE;
  
  seqName._unchangedPart = prefix + ext.Left(ext2.Len() - numLetters);
  seqName._changedPart = ext.RightPtr(numLetters);
  seqName._splitStyle = splitStyle;
  
  if (prefix.Len() < 1)
    _subName.SetFromAscii("file");
  else
    _subName.SetFrom(prefix, prefix.Len() - 1);
  
  UInt64 size;
  {
    NCOM::CPropVariant prop;
    RINOK(volumeCallback->GetProperty(kpidSize, &prop));
    if (prop.vt != VT_UI8)
      return E_INVALIDARG;
    size = prop.uhVal.QuadPart;
  }
  
  _totalSize += size;
  _sizes.Add(size);
  _streams.Add(stream);
  
  {
    UInt64 numFiles = _streams.Size();
    RINOK(callback->SetCompleted(&numFiles, NULL));
  }
  
  for (;;)
  {
    UString fullName;
    if (!seqName.GetNextName(fullName))
      break;
    CMyComPtr<IInStream> nextStream;
    HRESULT result = volumeCallback->GetStream(fullName, &nextStream);
    if (result == S_FALSE)
      break;
    if (result != S_OK)
      return result;
    if (!stream)
      break;
    {
      NCOM::CPropVariant prop;
      RINOK(volumeCallback->GetProperty(kpidSize, &prop));
      if (prop.vt != VT_UI8)
        return E_INVALIDARG;
//.........这里部分代码省略.........

STDMETHODIMP CHandler::Open(IInStream *stream, 
    const UInt64 *maxCheckStartPosition,
    IArchiveOpenCallback *openArchiveCallback)
{
  COM_TRY_BEGIN
  Close();
  try
  {
    CMyComPtr<IArchiveOpenVolumeCallback> openVolumeCallback;
    CMyComPtr<ICryptoGetTextPassword> getTextPassword;
    CMyComPtr<IArchiveOpenCallback> openArchiveCallbackWrap = openArchiveCallback;
    
    CVolumeName seqName;

    if (openArchiveCallback != NULL)
    {
      openArchiveCallbackWrap.QueryInterface(IID_IArchiveOpenVolumeCallback, &openVolumeCallback);
      RINOK(openArchiveCallback->SetTotal(NULL, NULL));
      UInt64 numFiles = _items.Size();
      RINOK(openArchiveCallback->SetCompleted(&numFiles, NULL));
      openArchiveCallbackWrap.QueryInterface(IID_ICryptoGetTextPassword, &getTextPassword);
    }

    for (;;)
    {
      CMyComPtr<IInStream> inStream;
      if (!_archives.IsEmpty())
      {
        if (!openVolumeCallback)
          break;
        
        if(_archives.Size() == 1)
        {
          if (!_archiveInfo.IsVolume())
            break;
          UString baseName;
          {
            NCOM::CPropVariant prop;
            RINOK(openVolumeCallback->GetProperty(kpidName, &prop));
            if (prop.vt != VT_BSTR)
              break;
            baseName = prop.bstrVal;
          }
          seqName.InitName(baseName, _archiveInfo.HaveNewVolumeName());
        }

        UString fullName = seqName.GetNextName();
        HRESULT result = openVolumeCallback->GetStream(fullName, &inStream);
        if (result == S_FALSE)
          break;
        if (result != S_OK)
          return result;
        if (!stream)
          break;
      }
      else
        inStream = stream;
      
      NArchive::NRar::CInArchive archive;
      if(!archive.Open(inStream, maxCheckStartPosition))
        return S_FALSE;

      if (_archives.IsEmpty())
        archive.GetArchiveInfo(_archiveInfo);
     
      CItemEx item;
      for (;;)
      {
        HRESULT result = archive.GetNextItem(item, getTextPassword);
        if (result == S_FALSE)
          break;
        RINOK(result);
        if (item.IgnoreItem())
          continue;

        bool needAdd = true;
        if (item.IsSplitBefore())
        {
          if (!_refItems.IsEmpty())
          {
            CRefItem &refItem = _refItems.Back();
            refItem.NumItems++;
            needAdd = false;
          }
        }
        if (needAdd)
        {
          CRefItem refItem;
          refItem.ItemIndex = _items.Size();
          refItem.NumItems = 1;
          refItem.VolumeIndex = _archives.Size();
          _refItems.Add(refItem);
        }
        _items.Add(item);
        if (openArchiveCallback != NULL)
        {
          UInt64 numFiles = _items.Size();
          RINOK(openArchiveCallback->SetCompleted(&numFiles, NULL));
        }
      }
//.........这里部分代码省略.........

void CPanel::OpenItemInArchive(int index, bool tryInternal, bool tryExternal, bool editMode)
{
  const UString name = GetItemName(index);
  if (IsNameVirus(name))
  {
    MessageBoxErrorLang(IDS_VIRUS, 0x03020284);
    return;
  }

  CMyComPtr<IFolderOperations> folderOperations;
  if (_folder.QueryInterface(IID_IFolderOperations, &folderOperations) != S_OK)
  {
    MessageBoxErrorLang(IDS_OPERATION_IS_NOT_SUPPORTED, 0x03020208);
    return;
  }

  bool tryAsArchive = tryInternal && (!tryExternal || !DoItemAlwaysStart(name));

  UString fullVirtPath = _currentFolderPrefix + name;

  NFile::NDirectory::CTempDirectoryW tempDirectory;
  tempDirectory.Create(kTempDirPrefix);
  UString tempDir = tempDirectory.GetPath();
  UString tempDirNorm = tempDir;
  NFile::NName::NormalizeDirPathPrefix(tempDirNorm);

  UString tempFilePath = tempDirNorm + GetCorrectFsPath(name);

  CTempFileInfo tempFileInfo;
  tempFileInfo.ItemName = name;
  tempFileInfo.FolderPath = tempDir;
  tempFileInfo.FilePath = tempFilePath;
  tempFileInfo.NeedDelete = true;

  if (tryAsArchive)
  {
    CMyComPtr<IInArchiveGetStream> getStream;
    _folder.QueryInterface(IID_IInArchiveGetStream, &getStream);
    if (getStream)
    {
      CMyComPtr<ISequentialInStream> subSeqStream;
      getStream->GetStream(index, &subSeqStream);
      if (subSeqStream)
      {
        CMyComPtr<IInStream> subStream;
        subSeqStream.QueryInterface(IID_IInStream, &subStream);
        if (subStream)
        {
          bool encrypted;
          if (OpenItemAsArchive(subStream, tempFileInfo, fullVirtPath, encrypted) == S_OK)
          {
            tempDirectory.DisableDeleting();
            RefreshListCtrl();
            return;
          }
        }
      }
    }
  }


  CRecordVector<UInt32> indices;
  indices.Add(index);

  UStringVector messages;

  bool usePassword = false;
  UString password;
  if (_parentFolders.Size() > 0)
  {
    const CFolderLink &fl = _parentFolders.Back();
    usePassword = fl.UsePassword;
    password = fl.Password;
  }

  HRESULT result = CopyTo(indices, tempDirNorm, false, true, &messages, usePassword, password);

  if (_parentFolders.Size() > 0)
  {
    CFolderLink &fl = _parentFolders.Back();
    fl.UsePassword = usePassword;
    fl.Password = password;
  }

  if (!messages.IsEmpty())
    return;
  if (result != S_OK)
  {
    if (result != E_ABORT)
      MessageBoxError(result);
    return;
  }


  if (tryAsArchive)
  {
    bool encrypted;
    if (OpenItemAsArchive(NULL, tempFileInfo, fullVirtPath, encrypted) == S_OK)
    {
      tempDirectory.DisableDeleting();
//.........这里部分代码省略.........

HRESULT CHandler::Open2(IInStream *stream,
    const UInt64 *maxCheckStartPosition,
    IArchiveOpenCallback *openArchiveCallback)
{
  {
    CMyComPtr<IArchiveOpenVolumeCallback> openVolumeCallback;
    CMyComPtr<ICryptoGetTextPassword> getTextPassword;
    CMyComPtr<IArchiveOpenCallback> openArchiveCallbackWrap = openArchiveCallback;
    
    CVolumeName seqName;

    UInt64 totalBytes = 0;
    UInt64 curBytes = 0;

    if (openArchiveCallback != NULL)
    {
      openArchiveCallbackWrap.QueryInterface(IID_IArchiveOpenVolumeCallback, &openVolumeCallback);
      openArchiveCallbackWrap.QueryInterface(IID_ICryptoGetTextPassword, &getTextPassword);
    }

    for (;;)
    {
      CMyComPtr<IInStream> inStream;
      if (!_archives.IsEmpty())
      {
        if (!openVolumeCallback)
          break;
        
        if (_archives.Size() == 1)
        {
          if (!_archiveInfo.IsVolume())
            break;
          UString baseName;
          {
            NCOM::CPropVariant prop;
            RINOK(openVolumeCallback->GetProperty(kpidName, &prop));
            if (prop.vt != VT_BSTR)
              break;
            baseName = prop.bstrVal;
          }
          seqName.InitName(baseName, _archiveInfo.HaveNewVolumeName());
        }

        UString fullName = seqName.GetNextName();
        HRESULT result = openVolumeCallback->GetStream(fullName, &inStream);
        if (result == S_FALSE)
          break;
        if (result != S_OK)
          return result;
        if (!stream)
          break;
      }
      else
        inStream = stream;

      UInt64 endPos = 0;
      if (openArchiveCallback != NULL)
      {
        RINOK(stream->Seek(0, STREAM_SEEK_END, &endPos));
        RINOK(stream->Seek(0, STREAM_SEEK_SET, NULL));
        totalBytes += endPos;
        RINOK(openArchiveCallback->SetTotal(NULL, &totalBytes));
      }
      
      NArchive::NRar::CInArchive archive;
      RINOK(archive.Open(inStream, maxCheckStartPosition));

      if (_archives.IsEmpty())
        archive.GetArchiveInfo(_archiveInfo);
     
      CItemEx item;
      for (;;)
      {
        bool decryptionError;
        HRESULT result = archive.GetNextItem(item, getTextPassword, decryptionError);
        if (result == S_FALSE)
        {
          if (decryptionError && _items.IsEmpty())
            return S_FALSE;
          break;
        }
        RINOK(result);
        if (item.IgnoreItem())
          continue;

        bool needAdd = true;
        if (item.IsSplitBefore())
        {
          if (!_refItems.IsEmpty())
          {
            CRefItem &refItem = _refItems.Back();
            refItem.NumItems++;
            needAdd = false;
          }
        }
        if (needAdd)
        {
          CRefItem refItem;
          refItem.ItemIndex = _items.Size();
          refItem.NumItems = 1;
//.........这里部分代码省略.........

HRESULT CFolderOutStream::OpenFile()
{
  if (NumIdenticalFiles == 0)
  {
    const CMvItem &mvItem = m_Database->Items[m_StartIndex + m_CurrentIndex];
    const CItem &item = m_Database->Volumes[mvItem.VolumeIndex].Items[mvItem.ItemIndex];
    int numExtractItems = 0;
    int curIndex;
    for (curIndex = m_CurrentIndex; curIndex < m_ExtractStatuses->Size(); curIndex++)
    {
      const CMvItem &mvItem2 = m_Database->Items[m_StartIndex + curIndex];
      const CItem &item2 = m_Database->Volumes[mvItem2.VolumeIndex].Items[mvItem2.ItemIndex];
      if (item.Offset != item2.Offset ||
          item.Size != item2.Size ||
          item.Size == 0)
        break;
      if (!m_TestMode && (*m_ExtractStatuses)[curIndex])
        numExtractItems++;
    }
    NumIdenticalFiles = (curIndex - m_CurrentIndex);
    if (NumIdenticalFiles == 0)
      NumIdenticalFiles = 1;
    TempBufMode = false;
    if (numExtractItems > 1)
    {
      if (!TempBuf || item.Size > TempBufSize)
      {
        FreeTempBuf();
        TempBuf = (Byte *)MyAlloc(item.Size);
        TempBufSize = item.Size;
        if (TempBuf == NULL)
          return E_OUTOFMEMORY;
      }
      TempBufMode = true;
      m_BufStartFolderOffset = item.Offset;
    }
    else if (numExtractItems == 1)
    {
      while (NumIdenticalFiles && !(*m_ExtractStatuses)[m_CurrentIndex])
      {
        CMyComPtr<ISequentialOutStream> stream;
        RINOK(m_ExtractCallback->GetStream(m_StartIndex + m_CurrentIndex, &stream, NExtract::NAskMode::kSkip));
        if (stream)
          return E_FAIL;
        RINOK(m_ExtractCallback->PrepareOperation(NExtract::NAskMode::kSkip));
        m_CurrentIndex++;
        m_FileIsOpen = true;
        CloseFile();
      }
    }
  }

  Int32 askMode = (*m_ExtractStatuses)[m_CurrentIndex] ? (m_TestMode ?
      NExtract::NAskMode::kTest :
      NExtract::NAskMode::kExtract) :
      NExtract::NAskMode::kSkip;
  RINOK(m_ExtractCallback->GetStream(m_StartIndex + m_CurrentIndex, &m_RealOutStream, askMode));
  if (!m_RealOutStream && !m_TestMode)
    askMode = NExtract::NAskMode::kSkip;
  return m_ExtractCallback->PrepareOperation(askMode);
}

STDMETHODIMP CHandler::Open(IInStream *inStream,
    const UInt64 *maxCheckStartPosition,
    IArchiveOpenCallback *callback)
{
  COM_TRY_BEGIN
  Close();
  HRESULT res = S_FALSE;
  CInArchive archive;
  CMyComPtr<IArchiveOpenVolumeCallback> openVolumeCallback;
  callback->QueryInterface(IID_IArchiveOpenVolumeCallback, (void **)&openVolumeCallback);
  
  CMyComPtr<IInStream> nextStream = inStream;
  bool prevChecked = false;
  UInt64 numItems = 0;
  try
  {
    while (nextStream != 0)
    {
      CDatabaseEx db;
      db.Stream = nextStream;
      res = archive.Open(maxCheckStartPosition, db);
      if (res == S_OK)
      {
        if (!m_Database.Volumes.IsEmpty())
        {
          const CDatabaseEx &dbPrev = m_Database.Volumes[prevChecked ? m_Database.Volumes.Size() - 1 : 0];
          if (dbPrev.ArchiveInfo.SetID != db.ArchiveInfo.SetID ||
              dbPrev.ArchiveInfo.CabinetNumber + (prevChecked ? 1: - 1) !=
              db.ArchiveInfo.CabinetNumber)
            res = S_FALSE;
        }
      }
      if (res == S_OK)
        m_Database.Volumes.Insert(prevChecked ? m_Database.Volumes.Size() : 0, db);
      else if (res != S_FALSE)
        return res;
      else
      {
        if (m_Database.Volumes.IsEmpty())
          return S_FALSE;
        if (prevChecked)
          break;
        prevChecked = true;
      }

      numItems += db.Items.Size();
      RINOK(callback->SetCompleted(&numItems, NULL));
        
      nextStream = 0;
      for (;;)
      {
        const COtherArchive *otherArchive = 0;
        if (!prevChecked)
        {
          const CInArchiveInfo &ai = m_Database.Volumes.Front().ArchiveInfo;
          if (ai.IsTherePrev())
            otherArchive = &ai.PrevArc;
          else
            prevChecked = true;
        }
        if (otherArchive == 0)
        {
          const CInArchiveInfo &ai = m_Database.Volumes.Back().ArchiveInfo;
          if (ai.IsThereNext())
            otherArchive = &ai.NextArc;
        }
        if (!otherArchive)
          break;
        const UString fullName = MultiByteToUnicodeString(otherArchive->FileName, CP_ACP);
        if (!openVolumeCallback)
          break;

        HRESULT result = openVolumeCallback->GetStream(fullName, &nextStream);
        if (result == S_OK)
          break;
        if (result != S_FALSE)
          return result;
        if (prevChecked)
          break;
        prevChecked = true;
      }
    }
    if (res == S_OK)
    {
      m_Database.FillSortAndShrink();
      if (!m_Database.Check())
        res = S_FALSE;
    }
  }
  catch(...)
  {
    res = S_FALSE;
  }
  if (res != S_OK)
  {
    Close();
    return res;
  }
  COM_TRY_END
  return S_OK;
//.........这里部分代码省略.........

HRESULT CArchiveLink::Open(
    CCodecs *codecs,
    const CIntVector &formatIndices,
    bool stdInMode,
    IInStream *stream,
    const UString &filePath,
    IArchiveOpenCallback *callback)
{
  Release();
  if (formatIndices.Size() >= 32)
    return E_NOTIMPL;
  
  HRESULT resSpec;

  for (;;)
  {
    resSpec = S_OK;
    int formatIndex = -1;
    if (formatIndices.Size() >= 1)
    {
      if (Arcs.Size() >= formatIndices.Size())
        break;
      formatIndex = formatIndices[formatIndices.Size() - Arcs.Size() - 1];
    }
    else if (Arcs.Size() >= 32)
      break;

    if (Arcs.IsEmpty())
    {
      CArc arc;
      arc.Path = filePath;
      arc.SubfileIndex = (UInt32)(Int32)-1;
      RINOK(arc.OpenStreamOrFile(codecs, formatIndex, stdInMode, stream, callback));
      Arcs.Add(arc);
      continue;
    }
    
    const CArc &arc = Arcs.Back();
    
    resSpec = (formatIndices.Size() == 0 ? S_OK : E_NOTIMPL);
    
    UInt32 mainSubfile;
    {
      NCOM::CPropVariant prop;
      RINOK(arc.Archive->GetArchiveProperty(kpidMainSubfile, &prop));
      if (prop.vt == VT_UI4)
        mainSubfile = prop.ulVal;
      else
        break;
      UInt32 numItems;
      RINOK(arc.Archive->GetNumberOfItems(&numItems));
      if (mainSubfile >= numItems)
        break;
    }

  
    CMyComPtr<IInArchiveGetStream> getStream;
    if (arc.Archive->QueryInterface(IID_IInArchiveGetStream, (void **)&getStream) != S_OK || !getStream)
      break;
    
    CMyComPtr<ISequentialInStream> subSeqStream;
    if (getStream->GetStream(mainSubfile, &subSeqStream) != S_OK || !subSeqStream)
      break;
    
    CMyComPtr<IInStream> subStream;
    if (subSeqStream.QueryInterface(IID_IInStream, &subStream) != S_OK || !subStream)
      break;
    
    CArc arc2;
    RINOK(arc.GetItemPath(mainSubfile, arc2.Path));
    
    CMyComPtr<IArchiveOpenSetSubArchiveName> setSubArchiveName;
    callback->QueryInterface(IID_IArchiveOpenSetSubArchiveName, (void **)&setSubArchiveName);
    if (setSubArchiveName)
      setSubArchiveName->SetSubArchiveName(arc2.Path);
    
    arc2.SubfileIndex = mainSubfile;
    HRESULT result = arc2.OpenStream(codecs, formatIndex, subStream, NULL, callback);
    resSpec = (formatIndices.Size() == 0 ? S_OK : S_FALSE);
    if (result == S_FALSE)
      break;
    RINOK(result);
    RINOK(arc.GetItemMTime(mainSubfile, arc2.MTime, arc2.MTimeDefined));
    Arcs.Add(arc2);
  }
  IsOpen = !Arcs.IsEmpty();
  return S_OK;
}

//.........这里部分代码省略.........
        }
      }
      else
      {
        if (res != S_FALSE)
          return res;
        if (m_Database.Volumes.IsEmpty())
          return S_FALSE;
        if (prevChecked)
          break;
        prevChecked = true;
        if (numTempVolumes != 0)
        {
          m_Database.Volumes.DeleteFrontal(numTempVolumes);
          numTempVolumes = 0;
        }
      }

      RINOK(callback->SetCompleted(&numItems, NULL));
        
      nextStream = NULL;
      
      for (;;)
      {
        const COtherArc *otherArc = NULL;
        if (!prevChecked)
        {
          if (numTempVolumes == 0)
          {
            const CInArcInfo &ai = m_Database.Volumes[0].ArcInfo;
            if (ai.IsTherePrev())
              otherArc = &ai.PrevArc;
            else
              prevChecked = true;
          }
          else
          {
            const CInArcInfo &ai = m_Database.Volumes[numTempVolumes - 1].ArcInfo;
            if (ai.IsThereNext())
              otherArc = &ai.NextArc;
            else
            {
              prevChecked = true;
              m_Database.Volumes.DeleteFrontal(numTempVolumes);
              numTempVolumes = 0;
            }
          }
        }
        if (!otherArc)
        {
          const CInArcInfo &ai = m_Database.Volumes.Back().ArcInfo;
          if (ai.IsThereNext())
            otherArc = &ai.NextArc;
        }
        if (!otherArc)
          break;
        if (!openVolumeCallback)
          break;
        // printf("\n%s", otherArc->FileName);
        const UString fullName = MultiByteToUnicodeString(otherArc->FileName, CP_ACP);
        HRESULT result = openVolumeCallback->GetStream(fullName, &nextStream);
        if (result == S_OK)
          break;
        if (result != S_FALSE)
          return result;

        if (!_errorMessage.IsEmpty())
          _errorMessage.Add_LF();
        _errorMessage.AddAscii("Can't open volume: ");
        _errorMessage += fullName;
        
        if (prevChecked)
          break;
        prevChecked = true;
        if (numTempVolumes != 0)
        {
          m_Database.Volumes.DeleteFrontal(numTempVolumes);
          numTempVolumes = 0;
        }
      }

    } // read nextStream iteration

    if (numTempVolumes != 0)
    {
      m_Database.Volumes.DeleteFrontal(numTempVolumes);
      numTempVolumes = 0;
    }
    if (m_Database.Volumes.IsEmpty())
      return S_FALSE;
    else
    {
      m_Database.FillSortAndShrink();
      if (!m_Database.Check())
        return S_FALSE;
    }
  }
  COM_TRY_END
  return S_OK;
}

static HRESULT InternalOpenArchive(C7ZipLibrary * pLibrary,
								   C7ZipDllHandler * pHandler,
								   C7ZipInStream * pInStream,
								   C7ZipArchiveOpenCallback * pOpenCallBack,
								   C7ZipArchive ** ppArchive,
								   HRESULT * pResult,
                                   bool fCheckFileTypeBySignature)
{
    CMyComPtr<IInArchive> archive = NULL;
    CMyComPtr<ISetCompressCodecsInfo> setCompressCodecsInfo = NULL;
    CMyComPtr<IInArchiveGetStream> getStream = NULL;

	wstring extension = pInStream->GetExt();

	C7ZipInStreamWrapper * pArchiveStream = new C7ZipInStreamWrapper(pInStream);

	CMyComPtr<IInStream> inStream(pArchiveStream);

	CMyComPtr<IArchiveOpenCallback> openCallBack(pOpenCallBack);

    std::vector<IInArchive *> archives;

	do {
        if (archive != NULL)
            archives.push_back(archive);

		FAIL_RET(CreateInArchive(pHandler->GetFunctions(),
								 pHandler->GetFormatInfoArray(),
                                 inStream,
								 extension,
								 archive,
                                 fCheckFileTypeBySignature), pResult);

		if (archive == NULL)
			return false;

		archive.QueryInterface(IID_ISetCompressCodecsInfo, (void **)&setCompressCodecsInfo);

		if (setCompressCodecsInfo) {
			C7ZipCompressCodecsInfo * pCompressCodecsInfo =
				new C7ZipCompressCodecsInfo(pLibrary);
			RBOOLOK(setCompressCodecsInfo->SetCompressCodecsInfo(pCompressCodecsInfo));
		}

		FAIL_RET(archive->Open(inStream, &kMaxCheckStartPosition, openCallBack), pResult);

		UInt32 mainSubfile;
		{
			NCOM::CPropVariant prop;
			FAIL_RET(archive->GetArchiveProperty(kpidMainSubfile, &prop), pResult);
			if (prop.vt == VT_UI4)
				mainSubfile = prop.ulVal;
			else {
				break;
			}

			UInt32 numItems;
			FAIL_RET(archive->GetNumberOfItems(&numItems), pResult);
			if (mainSubfile >= numItems)
				break;
		}

		if (archive->QueryInterface(IID_IInArchiveGetStream, (void **)&getStream) != S_OK || !getStream)
			break;

		CMyComPtr<ISequentialInStream> subSeqStream;
		if (getStream->GetStream(mainSubfile, &subSeqStream) != S_OK || !subSeqStream)
			break;

		inStream = NULL;
		if (subSeqStream.QueryInterface(IID_IInStream, &inStream) != S_OK || !inStream)
			break;

		wstring path;

		FAIL_RET(GetArchiveItemPath(archive, mainSubfile, path), pResult);

		CMyComPtr<IArchiveOpenSetSubArchiveName> setSubArchiveName;

		openCallBack->QueryInterface(IID_IArchiveOpenSetSubArchiveName, (void **)&setSubArchiveName);
		if (setSubArchiveName) {
			setSubArchiveName->SetSubArchiveName(path.c_str());
		}

		FAIL_RET(GetFilePathExt(path, extension), pResult);
	} while(true);

	if (archive == NULL)
		return S_FALSE;

	return Create7ZipArchive(pLibrary, archives, archive, ppArchive) ? S_OK : S_FALSE;
}

STDMETHODIMP CHandler::Open(IInStream *inStream, const UInt64 *, IArchiveOpenCallback *callback)
{
  COM_TRY_BEGIN

  Close();
  {
    CMyComPtr<IArchiveOpenVolumeCallback> openVolumeCallback;

    CVolumeName seqName;
    if (callback)
      callback->QueryInterface(IID_IArchiveOpenVolumeCallback, (void **)&openVolumeCallback);

    UInt32 numVolumes = 1;

    for (UInt32 i = 1; i <= numVolumes; i++)
    {
      CMyComPtr<IInStream> curStream;
      if (i == 1)
        curStream = inStream;
      else
      {
        UString fullName = seqName.GetNextName(i);
        HRESULT result = openVolumeCallback->GetStream(fullName, &curStream);
        if (result == S_FALSE)
          continue;
        if (result != S_OK)
          return result;
        if (!curStream)
          break;
      }
      CHeader header;
      HRESULT res = NWim::ReadHeader(curStream, header, _phySize);
      if (res != S_OK)
      {
        if (i != 1 && res == S_FALSE)
          continue;
        return res;
      }
      _isArc = true;
      _bootIndex = header.BootIndex;
      _version = header.Version;
      _isOldVersion = header.IsOldVersion();
      if (_firstVolumeIndex >= 0)
        if (!header.AreFromOnArchive(_volumes[_firstVolumeIndex].Header))
          break;
      if (_volumes.Size() > header.PartNumber && _volumes[header.PartNumber].Stream)
        break;
      CWimXml xml;
      xml.VolIndex = header.PartNumber;
      res = _db.OpenXml(curStream, header, xml.Data);
      if (res == S_OK)
      {
        if (!xml.Parse())
          _xmlError = true;

        UInt64 totalFiles = xml.GetTotalFilesAndDirs() + xml.Images.Size();
        totalFiles += 16 + xml.Images.Size() * 4; // we reserve some additional items
        if (totalFiles >= ((UInt32)1 << 30))
          totalFiles = 0;
        res = _db.Open(curStream, header, (unsigned)totalFiles, callback);
      }
      if (res != S_OK)
      {
        if (i != 1 && res == S_FALSE)
          continue;
        return res;
      }

      while (_volumes.Size() <= header.PartNumber)
        _volumes.AddNew();
      CVolume &volume = _volumes[header.PartNumber];
      volume.Header = header;
      volume.Stream = curStream;

      _firstVolumeIndex = header.PartNumber;

      if (_xmls.IsEmpty() || xml.Data != _xmls[0].Data)
      {
        wchar_t sz[16];
        ConvertUInt32ToString(xml.VolIndex, sz);
        xml.FileName = L'[';
        xml.FileName += sz;
        xml.FileName += L"].xml";
        _xmls.Add(xml);
      }

      if (i == 1)
      {
        if (header.PartNumber != 1)
          break;
        if (!openVolumeCallback)
          break;
        numVolumes = header.NumParts;
        {
          NCOM::CPropVariant prop;
          RINOK(openVolumeCallback->GetProperty(kpidName, &prop));
          if (prop.vt != VT_BSTR)
            break;
          seqName.InitName(prop.bstrVal);
        }
//.........这里部分代码省略.........

STDMETHODIMP CHandler::Open(IInStream *inStream,
    const UInt64 * /* maxCheckStartPosition */,
    IArchiveOpenCallback *openArchiveCallback)
{
  COM_TRY_BEGIN
  Close();
  try
  {
    CMyComPtr<IArchiveOpenVolumeCallback> openVolumeCallback;
    
    CVolumeName seqName;
    if (openArchiveCallback != NULL)
      openArchiveCallback->QueryInterface(IID_IArchiveOpenVolumeCallback, (void **)&openVolumeCallback);

    UInt32 numVolumes = 1;
    int firstVolumeIndex = -1;
    for (UInt32 i = 1; i <= numVolumes; i++)
    {
      CMyComPtr<IInStream> curStream;
      if (i != 1)
      {
        UString fullName = seqName.GetNextName(i);
        HRESULT result = openVolumeCallback->GetStream(fullName, &curStream);
        if (result == S_FALSE)
          continue;
        if (result != S_OK)
          return result;
        if (!curStream)
          break;
      }
      else
        curStream = inStream;
      CHeader header;
      HRESULT res = NWim::ReadHeader(curStream, header);
      if (res != S_OK)
      {
        if (i == 1)
          return res;
        if (res == S_FALSE)
          continue;
        return res;
      }
      if (firstVolumeIndex >= 0)
        if (!header.AreFromOnArchive(m_Volumes[firstVolumeIndex].Header))
          break;
      if (m_Volumes.Size() > header.PartNumber && m_Volumes[header.PartNumber].Stream)
        break;
      CXml xml;
      xml.VolIndex = header.PartNumber;
      res = OpenArchive(curStream, header, xml.Data, m_Database);
      if (res != S_OK)
      {
        if (i == 1)
          return res;
        if (res == S_FALSE)
          continue;
        return res;
      }
      
      while (m_Volumes.Size() <= header.PartNumber)
        m_Volumes.Add(CVolume());
      CVolume &volume = m_Volumes[header.PartNumber];
      volume.Header = header;
      volume.Stream = curStream;
      
      firstVolumeIndex = header.PartNumber;
      
      bool needAddXml = true;
      if (m_Xmls.Size() != 0)
        if (xml.Data == m_Xmls[0].Data)
          needAddXml = false;
      if (needAddXml)
      {
        xml.Parse();
        m_Xmls.Add(xml);
      }
      
      if (i == 1)
      {
        if (header.PartNumber != 1)
          break;
        if (!openVolumeCallback)
          break;
        numVolumes = header.NumParts;
        {
          NCOM::CPropVariant prop;
          RINOK(openVolumeCallback->GetProperty(kpidName, &prop));
          if (prop.vt != VT_BSTR)
            break;
          seqName.InitName(prop.bstrVal);
        }
      }
    }

    RINOK(SortDatabase(m_Database));

    wchar_t sz[32];
    ConvertUInt64ToString(m_Database.Streams.Size(), sz);
    m_NameLenForStreams = MyStringLen(sz);
  }
//.........这里部分代码省略.........