Fixed-Length Arrays

The XDR library provides a primitive, xdr_vector(), for fixed-length arrays, shown in the following code example.

Example A–11 xdr_vector Routine

#define NLEN 255	/* machine names must be < 256 chars */
#define NGRPS 20	/* user belongs to exactly 20 groups */

struct netuser {
 	char *nu_machinename;
 	int nu_uid;
 	int nu_gids[NGRPS];
};

bool_t
xdr_netuser(xdrs, nup)
 	XDR *xdrs;
 	struct netuser *nup;
{
 	int i;

	if (!xdr_string(xdrs, &nup->nu_machinename, NLEN))
 		return(FALSE);
 	if (!xdr_int(xdrs, &nup->nu_uid))
 		return(FALSE);
 	if (!xdr_vector(xdrs, nup->nu_gids, NGRPS, sizeof(int),
 	     xdr_int))
 		return(FALSE);
 	return(TRUE);
}