Re: [9fans] 8c padding problem

[erik quanstrom <quanstro@quanstro.net>]

> but it doesn't have to be.  this is legit:
> 
> 	typedef struct{
> 		Ehdr;		// 1
> 		Ehdr;		// 2
> 		uchar	op[2];
> 	}Pkt;

my explinations stink.  perhaps this gets at what
i'm saying better.  the structure S0 won't have
any padding, yet the two calls to frobehdr are
just fine.  i'm not sure i see the alignment problem
that requires padding all unnamed structures.

	typedef struct{
		uchar	s[6];
		uchar	d[6];
		uchar	t[2]
	}Ehdr;

	frobehdr(Ehdr*)

	typedef struct{
		uchar	s0[6];
		uchar	d0[6];
		uchar	t0[2]
		uchar	s1[6];
		uchar	d1[6];
		uchar	t1[2]
	}S0;

	void
	thunk0(void)
	{
		S0 *s;
		frobehdr((Ehdr*)s->s0);
		frobehdr((Ehdr*)s->s1);
	}


- erik