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Function Pointers?

 
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emh203@psu.edu



Joined: 05 May 2006
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Function Pointers?
PostPosted: Fri May 05, 2006 4:01 pm     Reply with quote
Does CCS allow the use of function pointers? For example, I want to pass a function pointer in another function like so (standard C):

unsigned char RegisterMessageDelegate(int (*MessageDelegate)(unsigned char *,unsigned short));

The compiler will not allow this. Is there another way of using function pointers with this compiler?

Thanks,
ELi
treitmey



Joined: 23 Jan 2004
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Location: Appleton,WI USA

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PostPosted: Fri May 05, 2006 8:02 pm     Reply with quote
It use to say just use a switch statment.
But now it looks like you can do it the ansi C way.
http://www.ccsinfo.com/faq.php?page=pointer_to_function
emh203@psu.edu



Joined: 05 May 2006
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No, not pointers to variables, pointers to Function
PostPosted: Mon May 08, 2006 7:26 am     Reply with quote
QSORT Only appears to be a standard pointer (for memory/variables). What I need is support for pointers to Functions.

-ELi
Ttelmah
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PostPosted: Mon May 08, 2006 7:38 am     Reply with quote
No, QSORT, uses pointers to functions, not just to values. There is a function 'ascending', and a function 'descending', and these are passed to the qsort function as the 'compare' item. Look again.

Best Wishes
Mark



Joined: 07 Sep 2003
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PostPosted: Mon May 08, 2006 7:59 am     Reply with quote
You can also use the search feature to find your answers. Here is a snippet from an old post

Code:

// Typedef for our function pointer
typedef int (*pFunc)(void);


int myfunction(void)
{
  return (1);
}

void main()
{
  int i;
  pFunc ptrtofunc;

  // Dummy initialization to keep the compiler from complaining
  ptrtofunc = myfunction;

  // Call the function
  i=(*ptrtofunc)();

  while( TRUE )
  {
  }
}
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