C++ UStringVector::Back方法代码示例

bool CDirEnumerator::GetNextFile(NFind::CFileInfoW &fileInfo, bool &filled, UString &resPath, DWORD &errorCode)
{
    filled = false;
    for (;;)
    {
        if (Enumerators.IsEmpty())
        {
            if (Index >= FileNames.Size())
                return true;
            const UString &path = FileNames[Index];
            int pos = path.ReverseFind(WCHAR_PATH_SEPARATOR);
            resPath.Empty();
            if (pos >= 0)
                resPath = path.Left(pos + 1);
            if (!NFind::FindFile(BasePrefix + path, fileInfo))
            {
                errorCode = ::GetLastError();
                resPath = path;
                return false;
            }
            Index++;
            break;
        }
        bool found;
        if (!Enumerators.Back().Next(fileInfo, found))
        {
            errorCode = ::GetLastError();
            resPath = Prefixes.Back();
            return false;
        }
        if (found)
        {
            resPath = Prefixes.Back();
            break;
        }
        Enumerators.DeleteBack();
        Prefixes.DeleteBack();
    }
    resPath += fileInfo.Name;
    if (!FlatMode && fileInfo.IsDir())
    {
        UString prefix = resPath + (UString)(wchar_t)kDirDelimiter;
        Enumerators.Add(NFind::CEnumeratorW(BasePrefix + prefix + (UString)(wchar_t)kAnyStringWildcard));
        Prefixes.Add(prefix);
    }
    filled = true;
    return true;
}

static HRESULT EnumerateAltStreams(
    const NFind::CFileInfo &fi,
    const NWildcard::CCensorNode &curNode,
    int phyParent, int logParent, const FString &fullPath,
    const UStringVector &addArchivePrefix,  // prefix from curNode
    CDirItems &dirItems)
{
  NFind::CStreamEnumerator enumerator(fullPath);
  for (;;)
  {
    NFind::CStreamInfo si;
    bool found;
    if (!enumerator.Next(si, found))
    {
      return dirItems.AddError(fullPath + FTEXT(":*")); // , (DWORD)E_FAIL
    }
    if (!found)
      return S_OK;
    if (si.IsMainStream())
      continue;
    UStringVector addArchivePrefixNew = addArchivePrefix;
    UString reducedName = si.GetReducedName();
    addArchivePrefixNew.Back() += reducedName;
    if (curNode.CheckPathToRoot(false, addArchivePrefixNew, true))
      continue;
    NFind::CFileInfo fi2 = fi;
    fi2.Name += us2fs(reducedName);
    fi2.Size = si.Size;
    fi2.Attrib &= ~FILE_ATTRIBUTE_DIRECTORY;
    fi2.IsAltStream = true;
    dirItems.AddDirFileInfo(phyParent, logParent, -1, fi2);
  }
}

void CCensor::AddItem(bool include, const UString &path, bool recursive)
{
  UStringVector pathParts;
  SplitPathToParts(path, pathParts);
  bool forFile = true;
  if (pathParts.Back().IsEmpty())
  {
    forFile = false;
    pathParts.DeleteBack();
  }
  const UString &front = pathParts.Front();
  bool isAbs = false;
  if (front.IsEmpty())
    isAbs = true;
  else if (front.Length() == 2 && front[1] == L':')
    isAbs = true;
  else
  {
    for (int i = 0; i < pathParts.Size(); i++)
    {
      const UString &part = pathParts[i];
      if (part == L".." || part == L".")
      {
        isAbs = true;
        break;
      }
    }
  }
  int numAbsParts = 0;
  if (isAbs)
    if (pathParts.Size() > 1)
      numAbsParts = pathParts.Size() - 1;
    else
      numAbsParts = 1;
  UString prefix;
  for (int i = 0; i < numAbsParts; i++)
  {
    const UString &front = pathParts.Front();
    if (DoesNameContainWildCard(front))
      break;
    prefix += front;
    prefix += WCHAR_PATH_SEPARATOR;
    pathParts.Delete(0);
  }
  int index = FindPrefix(prefix);
  if (index < 0)
    index = Pairs.Add(CPair(prefix));

  CItem item;
  item.PathParts = pathParts;
  item.ForDir = true;
  item.ForFile = forFile;
  item.Recursive = recursive;
  Pairs[index].Head.AddItem(include, item);
}

void Correct_FsPath(bool absIsAllowed, UStringVector &parts, bool isDir)
{
  unsigned i = 0;

  if (absIsAllowed)
  {
    #if defined(_WIN32) && !defined(UNDER_CE)
    bool isDrive = false;
    #endif
    if (parts[0].IsEmpty())
    {
      i = 1;
      #if defined(_WIN32) && !defined(UNDER_CE)
      if (parts.Size() > 1 && parts[1].IsEmpty())
      {
        i = 2;
        if (parts.Size() > 2 && parts[2] == L"?")
        {
          i = 3;
          if (parts.Size() > 3  && NWindows::NFile::NName::IsDrivePath2(parts[3]))
          {
            isDrive = true;
            i = 4;
          }
        }
      }
      #endif
    }
    #if defined(_WIN32) && !defined(UNDER_CE)
    else if (NWindows::NFile::NName::IsDrivePath2(parts[0]))
    {
      isDrive = true;
      i = 1;
    }

    if (isDrive)
    {
      // we convert "c:name" to "c:\name", if absIsAllowed path.
      UString &ds = parts[i - 1];
      if (ds.Len() > 2)
      {
        parts.Insert(i, ds.Ptr(2));
        ds.DeleteFrom(2);
      }
    }
    #endif
  }

  for (; i < parts.Size();)
  {
    UString &s = parts[i];

    Correct_PathPart(s);

    if (s.IsEmpty())
    {
      if (isDir || i != parts.Size() - 1)
      {
        parts.Delete(i);
        continue;
      }
      s = k_EmptyReplaceName;
    }
    else
    {
      #ifdef _WIN32
      CorrectUnsupportedName(s);
      #endif
    }
    
    i++;
  }

  if (!isDir)
  {
    if (parts.IsEmpty())
      parts.Add((UString)k_EmptyReplaceName);
    else
    {
      UString &s = parts.Back();
      if (s.IsEmpty())
        s = k_EmptyReplaceName;
    }
  }
}