ER: make PLC selection easier about libplctag HOT 3 CLOSED

I use an enumeration to simplify it:

enum PLC_PROT    // Protocols, see "check_cpu" in ab_common.c
{
     PROT_AB_PLC = 1,       // PLC, PLC5, SLC, SLC500
     PROT_AB_MLGX800 = 2,    // MicroLogix 800
     PROT_AB_MLGX = 3,      // MicroLogix 1000-1400
     PROT_AB_LGX = 4,       // CompactLogix, ControlLogix, FlexLogix
};

from libplctag.

If I rewrite the library in C++, I will think about heading this direction. One of the problems is that I want to export a common interface for all types of PLC so that you do not have to have PLC-specific tag creation functions.

And I am thinking about using C++. I found some interesting ways to keep the library size down. Unfortunately, it is still many times larger than the C version. I have not worked with uLibC++ yet.

from libplctag.

The first part of this is done. Tag will be constructed based on make/family/model. This is used with the new system special tags. All the remaining work to support the AB families will be mostly splitting up existing code and refactoring.

from libplctag.