if (AvMAX(thing) != -1) {
      /* an array with 10 slots has AvMax() set to 9 - te 2007-04-22 */
      total_size += sizeof(SV *) * (AvMAX(thing) + 1);

##</code><code>##

#define AvMAX(av)	((XPVAV*)  SvANY(av))->xav_max

##</code><code>##

#define AvARRAY(av)	((av)->sv_u.svu_array)
#define AvALLOC(av)	(*((SV***)&((XPVAV*)  SvANY(av))->xav_alloc))
#define AvMAX(av)	((XPVAV*)  SvANY(av))->xav_max
#define AvFILLp(av)	((XPVAV*)  SvANY(av))->xav_fill
#define AvARYLEN(av)	(*Perl_av_arylen_p(aTHX_ MUTABLE_AV(av)))

##</code><code>##

#define AvFILL(av)	((SvRMAGICAL((const SV *) (av))) \
			 ? mg_size(MUTABLE_SV(av)) : AvFILLp(av))