What this declaration stands for ??

[parbhani]

Hi all,

I am on Solaris. One of the C codes (Pro*C) we have has following declaration statement,

int (*dbg_print) (const char *fmt_str,...);

What is the meaning of this ? I can make out that this is pointer to function. But what the three dots "..." stand for ?

Please explain.

Regards

 

[amarg]

Hi,

It's look like a genaric function.

three dot means greater or equal to zero parameters for this function.

If you remember the prototype of printf statement is something like this

printf(char *, ...);

if means printf function is going somthing based on first parameter which is simple string for printf.

Regards,
Amar

 

[ArkM]

It's an ordinal pointer to function declaration, that's all.
For example, you may assign:

dbg_print = printf;
dbg_print("Format spec: %s\n",fmt_spec); /* or what else. */

It's not Solaris C specific declaration, it's a standard C declarator type (*f_ptr)(...);