Function EncodeVectorPOD

be/src/gutil/strings/serialize.h:216–228

// Verifies the given data type is a POD and copies the bytes of each value
// in the vector into a newly created string.
template <typename T> inline string EncodeVectorPOD(const vector<T>& vec) {
  ENFORCE_POD(T);
  string s;
  STLStringResizeUninitialized(&s, vec.size() * sizeof(T));
  typename vector<T>::const_iterator iter;
  char* ptr;
  for (iter = vec.begin(), ptr = string_as_array(&s);
       iter != vec.end();
       ++iter, ptr += sizeof(T)) {
    memcpy(ptr, &(*iter), sizeof(T));
  }
  return s;
}

// Reconstructs a vector of a plain old data type values from a C++ string.
// Verifies the given data type is a POD and copies the bytes of each value