C++ (Cpp) pointer_diff_type Examples

Example #1

File: pointer_logic.cpp Project: danpoe/cbmc

exprt pointer_logict::pointer_expr(
  const pointert &pointer,
  const typet &type) const
{
  if(pointer.object==null_object) // NULL?
  {
    if(pointer.offset==0)
    {
      constant_exprt result(type);
      result.set_value(ID_NULL);
      return result;
    }
    else
    {
      constant_exprt null(type);
      null.set_value(ID_NULL);
      return plus_exprt(null,
        from_integer(pointer.offset, pointer_diff_type()));
    }
  }
  else if(pointer.object==invalid_object) // INVALID?
  {
    constant_exprt result(type);
    result.set_value("INVALID");
    return result;
  }

  if(pointer.object>=objects.size())
  {
    constant_exprt result(type);
    result.set_value("INVALID-"+std::to_string(pointer.object));
    return result;
  }

  const exprt &object_expr=objects[pointer.object];

  exprt deep_object=object_rec(pointer.offset, type, object_expr);

  exprt result;

  if(type.id()==ID_pointer)
    result=exprt(ID_address_of, type);
  else if(type.id()==ID_reference)
    result=exprt("reference_to", type);
  else
    assert(0);

  result.copy_to_operands(deep_object);
  return result;
}

Example #2

File: c_types.cpp Project: romainbrenguier/cbmc

typet signed_size_type()
{
  // we presume this is the same as pointer difference
  return pointer_diff_type();
}