[showdax]

I think the following would be a better way to use DLL-related functions like things in CBaseEntity.

First, a forward declaration:

class CBasePlayer;

A handy typedef for casting a void pointer to our function pointer:

typedef void (*ShowViewPortPanel_Function)(CBasePlayer *, char const *, bool, KeyValues *);

The global variable for the function pointer:

void (*ShowViewPortPanel)(CBasePlayer *, char const *, bool, KeyValues *) = NULL;

And then we find the memory address to the function (signature scanning):

ShowViewPortPanel = (ShowViewPortPanel_Function) someScanFunctionThatReturnsAVoidPointer();

And finally:

CBasePlayer *player = (CBasePlayer *) entity->GetUnknown()->GetBaseEntity();

if (player)
{
	ShowViewPortPanel(player, "info", shown, panel);
}

This works fine for me under Linux. According to BAILOPAN, it isn't as simple as giving member function pointers the instance as the first argument under Windows. I think all plugins that use these kinds of functions should use a method like this, with it gracefully disabling commands when it can't find functions.

But then you have things like inline functions which access member variables (like CBaseEntity::AddEFlags) and then you're fucked. For this I was thinking of reverse-engineering the current CBaseEntity/whatever definitions from what's in the CS:S and DOD:S binaries. Then the plugin would have a cvar that enables or disables functionality that uses member variables so one can avoid crashes when Valve updates it again.

The only thing is I'm not really sure how classes are defined in ELF or PE binaries. We'd really only need a definition for the member variables, but I don't know where to start.