Function is_null

c/tests/tls_test.cpp:269–271

}

bool is_null(pn_raw_buffer_t &rb) {
  return rb.bytes == NULL && rb.capacity == 0 && rb.size == 0 && rb.offset == 0;
}

bool is_valid(pn_raw_buffer_t &rb) {
  return rb.bytes && rb.capacity && (rb.size + rb.offset <= rb.capacity);