Function Pointers

• Francisco Tolmasky Function Pointers Mar 27 2005, 10:42
  I'm trying to interface with some c code that requires me to pass a
  function pointer.  I was wondering if its possible to pass a specific
  objects instance of a function.  For example:
  
  a->p_func= myObjCObject->stringValue or something like that.  I'd very
  much like to avoid writing a wrapper c function just to do
  [myObjCObject stringValue] since it will probably require me to write a
  lookup table etc etc.
  
  Thanks in advance,
  
  Francisco
• Scott Ribe Re: Function Pointers Mar 27 2005, 17:50
  > I'm trying to interface with some c code that requires me to pass a
  > function pointer.  I was wondering if its possible to pass a specific
  > objects instance of a function.
  

  
  No. If the API allows you to pass in some data for your function via a void
  *, then you can use that to pass your object, along with a pointer to a
  static function which will cast the void * to your function pointer and call
  the appropriate method. If the API does not do this, it is poorly designed.
  
  --
  Scott Ribe
  <scott_ribe...>
  http://www.killerbytes.com/
  (303) 665-7007 voice