🚀 go-pugleaf

In article <38874@bbn.COM> cosell@BBN.COM (Bernie Cosell) writes:
>In article <11940@grebyn.COM> ckp@grebyn.COM (Checkpoint Technologies) writes:
>}
>}Someone asked about calculating structure member offsets in a portable
>}way.  You were close, but try this:
...
>You don't need the dummy variable: it is legal in C (although I don't know
>for ANSI C) to coerce the address '0' to be a pointer to anything.  And so
>        #define offset(s,f)       &(((s *)0)->f)
>works just fine.

	Lattice 5.02 has an offsetof() macro in stddef.h (where ANSI says
it should be).

-- 
Randell Jesup, Commodore Engineering {uunet|rutgers|allegra}!cbmvax!jesup