list.cpp

一个7ZIP的解压源码。比较详细。里面含有四种语言的实现代码。

  for (int i = 0; i < _fields.Size(); i++)
  {
    const CFieldInfo &fieldInfo = _fields[i];
    if (!techMode)
      PrintSpaces(fieldInfo.PrefixSpacesWidth);

    NCOM::CPropVariant propVariant;
    RINOK(archive->GetProperty(index, fieldInfo.PropID, &propVariant));
    if (techMode)
    {
      g_StdOut << fieldInfo.Name << " = ";
    }
    int width = (fieldInfo.PropID == kpidPath) ? 0: fieldInfo.Width;
    if (propVariant.vt == VT_EMPTY)
    {
      switch(fieldInfo.PropID)
      {
        case kpidPath:
          propVariant = defaultItemName;
          break;
        case kpidLastWriteTime:
          propVariant = archiveFileInfo.LastWriteTime;
          break;
        default:
          if (techMode)
            g_StdOut << endl;
          else
            PrintSpaces(width);
          continue;
      }
    }
    if (fieldInfo.PropID == kpidLastWriteTime)
    {
      PrintTime(propVariant);
    }
    else if (fieldInfo.PropID == kpidAttributes)
    {
      if (propVariant.vt != VT_UI4)
        throw "incorrect item";
      UInt32 attributes = propVariant.ulVal;
      bool isFolder;
      RINOK(IsArchiveItemFolder(archive, index, isFolder));
      char s[8];
      GetAttributesString(attributes, isFolder, s);
      g_StdOut << s;
    }
    else if (propVariant.vt == VT_BSTR)
    {
      if (techMode)
        g_StdOut << propVariant.bstrVal;
      else
        PrintString(fieldInfo.TextAdjustment, width, propVariant.bstrVal);
    }
    else
    {
      UString s = ConvertPropertyToString(propVariant, fieldInfo.PropID);
      s.Replace(wchar_t(0xA), L' '); 
      s.Replace(wchar_t(0xD), L' '); 

      if (techMode)
        g_StdOut << s;
      else
        PrintString(fieldInfo.TextAdjustment, width, s);
    }
    if (techMode)
      g_StdOut << endl;
  }
  return S_OK;
}

void PrintNumberString(EAdjustment adjustment, int width, const UInt64 *value)
{
  wchar_t textString[32] = { 0 };
  if (value != NULL)
    ConvertUInt64ToString(*value, textString);
  PrintString(adjustment, width, textString);
}


HRESULT CFieldPrinter::PrintSummaryInfo(UInt64 numFiles, UInt64 numDirs, 
    const UInt64 *size, const UInt64 *compressedSize)
{
  for (int i = 0; i < _fields.Size(); i++)
  {
    const CFieldInfo &fieldInfo = _fields[i];
    PrintSpaces(fieldInfo.PrefixSpacesWidth);
    NCOM::CPropVariant propVariant;
    if (fieldInfo.PropID == kpidSize)
      PrintNumberString(fieldInfo.TextAdjustment, fieldInfo.Width, size);
    else if (fieldInfo.PropID == kpidPackedSize)
      PrintNumberString(fieldInfo.TextAdjustment, fieldInfo.Width, compressedSize);
    else if (fieldInfo.PropID == kpidPath)
    {
      wchar_t textString[32];
      ConvertUInt64ToString(numFiles, textString);
      UString temp = textString;
      temp += L" ";
      temp += kFilesMessage;
      temp += L", ";
      ConvertUInt64ToString(numDirs, textString);
      temp += textString;
      temp += L" ";
      temp += kDirsMessage;
      PrintString(fieldInfo.TextAdjustment, 0, temp);
    }
    else 
      PrintString(fieldInfo.TextAdjustment, fieldInfo.Width, L"");
  }
  return S_OK;
}

bool GetUInt64Value(IInArchive *archive, UInt32 index, PROPID propID, UInt64 &value)
{
  NCOM::CPropVariant propVariant;
  if (archive->GetProperty(index, propID, &propVariant) != S_OK)
    throw "GetPropertyValue error";
  if (propVariant.vt == VT_EMPTY)
    return false;
  value = ConvertPropVariantToUInt64(propVariant);
  return true;
}

HRESULT ListArchives(
    CCodecs *codecs,
    UStringVector &archivePaths, UStringVector &archivePathsFull,
    const NWildcard::CCensorNode &wildcardCensor,
    bool enableHeaders, bool techMode, bool &passwordEnabled, UString &password, UInt64 &numErrors)
{
  numErrors = 0;
  CFieldPrinter fieldPrinter;
  if (!techMode)
    fieldPrinter.Init(kStandardFieldTable, sizeof(kStandardFieldTable) / sizeof(kStandardFieldTable[0]));

  UInt64 numFiles2 = 0, numDirs2 = 0, totalPackSize2 = 0, totalUnPackSize2 = 0;
  UInt64 *totalPackSizePointer2 = 0, *totalUnPackSizePointer2 = 0;
  for (int i = 0; i < archivePaths.Size(); i++)
  {
    const UString &archiveName = archivePaths[i];
    NFile::NFind::CFileInfoW archiveFileInfo;
    if (!NFile::NFind::FindFile(archiveName, archiveFileInfo) || archiveFileInfo.IsDirectory())
    {
      g_StdOut << endl << "Error: " << archiveName << " is not archive" << endl;
      numErrors++;
      continue;
    }
    if (archiveFileInfo.IsDirectory())
    {
      g_StdOut << endl << "Error: " << archiveName << " is not file" << endl;
      numErrors++;
      continue;
    }

    CArchiveLink archiveLink;

    COpenCallbackConsole openCallback;
    openCallback.OutStream = &g_StdOut;
    openCallback.PasswordIsDefined = passwordEnabled;
    openCallback.Password = password;

    HRESULT result = MyOpenArchive(codecs, archiveName, archiveLink, &openCallback);
    if (result != S_OK)
    {
      g_StdOut << endl << "Error: " << archiveName << " is not supported archive" << endl;
      numErrors++;
      continue;
    }

    for (int v = 0; v < archiveLink.VolumePaths.Size(); v++)
    {
      int index = archivePathsFull.FindInSorted(archiveLink.VolumePaths[v]);
      if (index >= 0 && index > i)
      {
        archivePaths.Delete(index);
        archivePathsFull.Delete(index);
      }
    }

    IInArchive *archive = archiveLink.GetArchive();
    const UString defaultItemName = archiveLink.GetDefaultItemName();

    if (enableHeaders)
    {
      g_StdOut << endl << kListing << archiveName << endl << endl;

      UInt32 numProps;
      if (archive->GetNumberOfArchiveProperties(&numProps) == S_OK)
      {
        for (UInt32 i = 0; i < numProps; i++)
        {
          CMyComBSTR name;
          PROPID propID;
          VARTYPE vt;
          if (archive->GetArchivePropertyInfo(i, &name, &propID, &vt) != S_OK)
            continue;
          NCOM::CPropVariant prop;
          if (archive->GetArchiveProperty(propID, &prop) != S_OK)
            continue;
          UString s = ConvertPropertyToString(prop, propID);
          if (!s.IsEmpty())
            g_StdOut << GetPropName(propID, name) << " = " << s << endl;
        }
      }
      if (techMode)
        g_StdOut << "----------\n";
      if (numProps > 0)
        g_StdOut << endl;
    }

    if (enableHeaders && !techMode)
    {
      fieldPrinter.PrintTitle();
      g_StdOut << endl;
      fieldPrinter.PrintTitleLines();
      g_StdOut << endl;
    }

    if (techMode)
    {
      RINOK(fieldPrinter.Init(archive));
    }
    UInt64 numFiles = 0, numDirs = 0, totalPackSize = 0, totalUnPackSize = 0;
    UInt64 *totalPackSizePointer = 0, *totalUnPackSizePointer = 0;
    UInt32 numItems;
    RINOK(archive->GetNumberOfItems(&numItems));
    for(UInt32 i = 0; i < numItems; i++)
    {
      if (NConsoleClose::TestBreakSignal())
        return E_ABORT;

      UString filePath;
      RINOK(GetArchiveItemPath(archive, i, defaultItemName, filePath));

      bool isFolder;
      RINOK(IsArchiveItemFolder(archive, i, isFolder));
      if (!wildcardCensor.CheckPath(filePath, !isFolder))
        continue;
      
      fieldPrinter.PrintItemInfo(archive, defaultItemName, archiveFileInfo, i, techMode);
      
      UInt64 packSize, unpackSize;
      if (!GetUInt64Value(archive, i, kpidSize, unpackSize))
        unpackSize = 0;
      else
        totalUnPackSizePointer = &totalUnPackSize;
      if (!GetUInt64Value(archive, i, kpidPackedSize, packSize))
        packSize = 0;
      else
        totalPackSizePointer = &totalPackSize;
      
      g_StdOut << endl;

      if (isFolder)
        numDirs++;
      else
        numFiles++;
      totalPackSize += packSize;
      totalUnPackSize += unpackSize;
    }
    if (enableHeaders && !techMode)
    {
      fieldPrinter.PrintTitleLines();
      g_StdOut << endl;
      fieldPrinter.PrintSummaryInfo(numFiles, numDirs, totalUnPackSizePointer, totalPackSizePointer);
      g_StdOut << endl;
    }
    if (totalPackSizePointer != 0)
    {
      totalPackSizePointer2 = &totalPackSize2;
      totalPackSize2 += totalPackSize;
    }
    if (totalUnPackSizePointer != 0)
    {
      totalUnPackSizePointer2 = &totalUnPackSize2;
      totalUnPackSize2 += totalUnPackSize;
    }
    numFiles2 += numFiles;
    numDirs2 += numDirs;
  }
  if (enableHeaders && !techMode && archivePaths.Size() > 1)
  {
    g_StdOut << endl;
    fieldPrinter.PrintTitleLines();
    g_StdOut << endl;
    fieldPrinter.PrintSummaryInfo(numFiles2, numDirs2, totalUnPackSizePointer2, totalPackSizePointer2);
    g_StdOut << endl;
    g_StdOut << "Archives: " << archivePaths.Size() << endl;
  }
  return S_OK;
}