Macro inside a Function and stringfication

Question

I have the following function foo() and the macro FOO(str).

void foo(const char *fmt, ...) {
   va_list args;
   va_start(args,fmt);
   vsprintf(msgbuff,fmt,args);
   va_end(args);
   printf("%s\n",msgbuff);
}

#define FOO(str)\
foo str;           // No need of brackets as they are coming in 'str'

I used to call the macro like below:

FOO(("My %s is %s\n","Name","Bala"));

Now my Requirement is:

Macro FOO(str) should not call my function foo() directly but instead it should call it through another function like func().

Finally my macro should be like below

#define FOO(str)\
func(#str) // Do I need to Stringizing str? 

My question is, how can I call function foo() from inside func()? Please suggest any possible implementation.

Answer 1

You can use variadic macro

#define FOO(...) \
fun(__VA_ARGS__);

And call it like this

FOO("A", "B", "C")

EDIT:

As pointed out by Olaf, this is not encouraged and can be replaced by a direct function call