I set Function Pointer variable to private so unauthorized users cannot
access it, but they are allowed to use Get_ and Set_ functions to modify
Function Pointer variable. Look at my example.

unsigned char foo(void)
{
return 0xC1;
}

unsigned char (*pfoo)(void) = foo;

unsigned char* Get_foo(void)
{
// return pfoo; // Error -- can't return function pointer
return unsigned char (*pfoo)(void); // Error -- can't return function
pointer
}

Can you please correct Get_foo() function?

Bryan Parkoff

Bryan Parkoff wrote:[color=blue]
> I set Function Pointer variable to private so unauthorized users cannot
> access it, but they are allowed to use Get_ and Set_ functions to modify
> Function Pointer variable. Look at my example.
>
> unsigned char foo(void)
> {
> return 0xC1;
> }
>
> unsigned char (*pfoo)(void) = foo;
>
> unsigned char* Get_foo(void)
> {
> // return pfoo; // Error -- can't return function pointer
> return unsigned char (*pfoo)(void); // Error -- can't return function
> pointer
> }
>
> Can you please correct Get_foo() function?[/color]

Take a look here:

http://www.newty.de/fpt/fpt.html#r_value

Ben
--
I'm not just a number. To many, I'm known as a String...

Bryan Parkoff wrote:[color=blue]
> I set Function Pointer variable to private so unauthorized users cannot
> access it, but they are allowed to use Get_ and Set_ functions to modify
> Function Pointer variable. Look at my example.
>
> unsigned char foo(void)[/color]

Bad habit.
unsigned char foo()
[color=blue]
> {
> return 0xC1;
> }
>
> unsigned char (*pfoo)(void) = foo;[/color]

unsigned char(*pfoo)() = foo;
[color=blue]
> unsigned char* Get_foo(void)[/color]

unsigned char(*)() Get_Foo()
[color=blue]
> {
> // return pfoo; // Error -- can't return function pointer
> return unsigned char (*pfoo)(void); // Error -- can't return function
> pointer
> }
>
> Can you please correct Get_foo() function?[/color]
Sure.

The above works. But it is easier to write:
unsigned char foo()
{
return 0xC1;
}

typedef unsigned char (*pfoo_type)();

pfoo_type pfoo = foo;

pfoo_type Get_Foo()
{
return pfoo;
}

Gabriel