Enable table extensibility using smart pointers

You should use the High Performance Database (HPDB) to access data when you want to extend baseline tables with customized fields.

If you still want to use lower-level Application Programming Interfaces (APIs) to access the records of tables that have been extended, you must not use static structures defined in C/C++ header files.

For example:

static tablename record;

if (!v_recget(dbnumber, pointnumber, &record, sizeof(record), V_READONLY, pDBErr))

You must use smart pointers in combination with get() and size() methods.

For example:

static auto record = rtdb::make_unique<tablename>();

if (!v_recget(dbnumber, pointnumber, record.get(), record.size(), V_READONLY, pDBErr))

Where:

tablename is the name of a table and also the name of a structure defined in a C/C++ header file.