alloc_hint_index = buf.getIndex();
            buf.enc_ndr_long(0); /* momentarily skip alloc hint */
            buf.enc_ndr_short(0); /* context id */
            buf.enc_ndr_short(getOpnum());
        }

        encode_in(buf);
        length = buf.getIndex() - start;

        if (ptype == 0) {
            buf.setIndex(alloc_hint_index);
            alloc_hint = length - alloc_hint_index;

            alloc_hint_index = buf.getIndex();
            buf.enc_ndr_long(0); /* momentarily skip alloc hint */
            buf.enc_ndr_short(0); /* context id */
            buf.enc_ndr_short(getOpnum());
        }

        encode_in(buf);
        this.length = buf.getIndex() - start;

        if ( this.ptype == 0 ) {
            buf.setIndex(alloc_hint_index);