In the last episode (Apr 04), Matt said:
> I need some help understanding some C code.
>
> int (*if_ioctl)
> (struct ifnet *, int, caddr_t);
>
> int (*if_watchdog)
> (int);
>
> Can someone break down these declarations (if that's what they are)? Is
> this a form of typecasting? Thanks for your help.
The cdecl command (ports/devel/cutils) is good as decoding stuff like
this. Those two lines declare variables that are pointers to
functions.
$ cdecl explain "int (*if_ioctl) (struct ifnet *, int, caddr_t)"
declare if_ioctl as pointer to function (pointer to struct ifnet, int, addr_t)
returning int
$ cdecl explain "int (*if_watchdog) (int)"
declare if_watchdog as pointer to function (int) returning int
--
Dan Nelson
[EMAIL PROTECTED]
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