MD_HEADER_SIZE
total_size = MD_HEADER_SIZE + offset * MD_ELEMENT_SIZE +
string_bufferp = bufferp + MD_HEADER_SIZE + offset * MD_ELEMENT_SIZE;
mdep = (md_element_t *)(bufferp + MD_HEADER_SIZE);
mdp->size = MD_HEADER_SIZE + mdp->node_blk_size +
mdp->mdep = (md_element_t *)(mdp->caddr + MD_HEADER_SIZE);
mdp->namep = (char *)(mdp->caddr + MD_HEADER_SIZE + mdp->node_blk_size);
mdp->datap = (uint8_t *)(mdp->caddr + MD_HEADER_SIZE +
mdep = (md_element_t *)(ptr + MD_HEADER_SIZE);
namep = (char *)(ptr + MD_HEADER_SIZE + hdrp->node_blk_sz);