EnumVisibleObjects filter argument

[alex_v]

How to narrow EnumVisibleObjects using second, argument, named "filter" in this thread?
http://www.ownedcore.com/forums/worl...managment.html ([WoW][3.2.0] Better Object Managment)
I have tried passing different values, nothing happens, it just iterates everything.
Looks like EnumVisibleObjects just passes it to callback and that is all, nothing else.

signed int __cdecl EnumVisibleObjects(int (__cdecl *a1)(_DWORD, _DWORD, _DWORD), int whyCallItFilter)
{
  int v2; // eax@1
  int v3; // esi@1
  int v4; // ebx@3

  v3 = *(_DWORD *)(*MK_FP(__FS__, 44) + 4 * TlsIndex);
  v2 = *(_DWORD *)(*(_DWORD *)(v3 + 8) + 172);
  if ( !(v2 & 1) && v2 )
    v4 = *(_DWORD *)(*(_DWORD *)(v3 + 8) + 172);
  else
    v4 = 0;
  while ( !(v4 & 1) && v4 )
  {
    if ( !a1(*(_DWORD *)(v4 + 48), *(_DWORD *)(v4 + 52), whyCallItFilter) )
      return 0;
    v4 = *(_DWORD *)(v4 + *(_DWORD *)(*(_DWORD *)(v3 + 8) + 164) + 4);
  }
  return 1;
}

3.3.5.12340

[TOM_RUS]

Yes that's how it works. It's arbitrary argument (I think blizz call it "param" or something), you can pass anything that fits, and then use that value in callback. You can use it to say find first n object(s) that match some criteria by implementing that logic in your callback.

Function       : static, [000B0D30][0001:000AFD30], len = 00000085, int __fastcall ClntObjMgrEnumVisibleObjects(int (__fastcall*)(unsigned __int64,void *),void *)
                 Function attribute:
                 Function info:
FuncDebugStart :   static, [000B0D39][0001:000AFD39]
FuncDebugEnd   :   static, [000B0DB1][0001:000AFDB1]
Data           :   enregistered ecx, Param, Type: function  *, handler
Data           :   enregistered edx, Param, Type: void *, param
Data           :   VFrame Relative, [FFFFFFFC], Local, Type: int, success

This is from pdb dump of ancient wow alpha build. As you can see first argument named "handler" is function pointer, and second one named "param" has a type of "void *".

[Jadd]

Just think of it as lParam as used in various Windows functions, ie. EnumWindows.