// Implement the 'x' operation. This function extracts files back to the file
// system.
static void doExtract(StringRef Name, object::Archive::child_iterator I) {
  // Retain the original mode.
  sys::fs::perms Mode = I->getAccessMode();
  SmallString<128> Storage = Name;

  int FD;
  failIfError(
      sys::fs::openFileForWrite(Storage.c_str(), FD, sys::fs::F_None, Mode),
      Storage.c_str());

  {
    raw_fd_ostream file(FD, false);

    // Get the data and its length
    StringRef Data = I->getBuffer();

    // Write the data.
    file.write(Data.data(), Data.size());
  }

  // If we're supposed to retain the original modification times, etc. do so
  // now.
  if (OriginalDates)
    failIfError(
        sys::fs::setLastModificationAndAccessTime(FD, I->getLastModified()));

  if (close(FD))
    fail("Could not close the file");
}

// Implement the 't' operation. This function prints out just
// the file names of each of the members. However, if verbose mode is requested
// ('v' modifier) then the file type, permission mode, user, group, size, and
// modification time are also printed.
static void doDisplayTable(StringRef Name, object::Archive::child_iterator I) {
  if (Verbose) {
    sys::fs::perms Mode = I->getAccessMode();
    printMode((Mode >> 6) & 007);
    printMode((Mode >> 3) & 007);
    printMode(Mode & 007);
    outs() << ' ' << I->getUID();
    outs() << '/' << I->getGID();
    outs() << ' ' << format("%6llu", I->getSize());
    outs() << ' ' << I->getLastModified().str();
    outs() << ' ';
  }
  outs() << Name << "\n";
}

// Implements the 'p' operation. This function traverses the archive
// looking for members that match the path list.
static void doPrint(StringRef Name, object::Archive::child_iterator I) {
  if (Verbose)
    outs() << "Printing " << Name << "\n";

  StringRef Data = I->getBuffer();
  outs().write(Data.data(), Data.size());
}

void addMember(std::vector<NewArchiveIterator> &Members,
               object::Archive::child_iterator I, StringRef Name,
               int Pos = -1) {
  if (Thin && !I->getParent()->isThin())
    fail("Cannot convert a regular archive to a thin one");
  NewArchiveIterator NI(I, Name);
  if (Pos == -1)
    Members.push_back(NI);
  else
    Members[Pos] = NI;
}