- cmp = 2;
-#if RSET_DEBUG
- logf (LOG_DEBUG, "r_read_and [%p] looping: m=%d/%d c=%d t=%d",
- rfd, p->more_l, p->more_r, cmp, p->tail);
- (*kctrl->log_item)(LOG_DEBUG, p->buf_l, "left ");
- (*kctrl->log_item)(LOG_DEBUG, p->buf_r, "right ");
-#endif
- if (!cmp)
- {
- memcpy (buf, p->buf_l, kctrl->key_size);
- p->more_l = rset_read (p->rfd_l, p->buf_l);
- p->tail = 1;
- }
- else if (cmp == 1)
- {
- memcpy (buf, p->buf_r, kctrl->key_size);
- p->more_r = rset_read (p->rfd_r, p->buf_r);
- p->tail = 1;
-#if RSET_DEBUG
- logf (LOG_DEBUG, "r_read_and [%p] returning R m=%d/%d c=%d",
- rfd, p->more_l, p->more_r, cmp);
- key_logdump(LOG_DEBUG,buf);
- (*kctrl->log_item)(LOG_DEBUG, buf, "");
-#endif
- p->hits++;
- return 1;
- }
- else if (cmp == -1)
- {
- memcpy (buf, p->buf_l, kctrl->key_size);
- p->more_l = rset_read (p->rfd_l, p->buf_l);
- p->tail = 1;
-#if RSET_DEBUG
- logf (LOG_DEBUG, "r_read_and [%p] returning L m=%d/%d c=%d",
- rfd, p->more_l, p->more_r, cmp);
- (*kctrl->log_item)(LOG_DEBUG, buf, "");
-#endif
- p->hits++;
- return 1;
- }
- else if (cmp > 1) /* cmp == 2 */
- {
- if (p->tail)
- {
- memcpy (buf, p->buf_r, kctrl->key_size);
- p->more_r = rset_read (p->rfd_r, p->buf_r);
- if (!p->more_r || (*kctrl->cmp)(p->buf_r, buf) > 1)
- p->tail = 0;
-#if RSET_DEBUG
- logf (LOG_DEBUG, "r_read_and [%p] returning R tail m=%d/%d c=%d",
- rfd, p->more_l, p->more_r, cmp);
- (*kctrl->log_item)(LOG_DEBUG, buf, "");
-#endif
- p->hits++;
- return 1;
- }
- else
- {
-#if RSET_DEBUG
- logf (LOG_DEBUG, "r_read_and [%p] about to forward R "
- "m=%d/%d c=%d",
- rfd, p->more_l, p->more_r, cmp);
-#endif
- if (p->more_r && p->more_l)
- p->more_r = rset_forward( p->rfd_r, p->buf_r, p->buf_l);
- else
- return 0; /* no point in reading further */
- }
- }
- else /* cmp == -2 */
- {
- if (p->tail)
- {
- memcpy (buf, p->buf_l, kctrl->key_size);
- p->more_l = rset_read (p->rfd_l, p->buf_l);
- if (!p->more_l || (*kctrl->cmp)(p->buf_l, buf) > 1)
- p->tail = 0;
-#if RSET_DEBUG
- logf (LOG_DEBUG, "r_read_and [%p] returning L tail m=%d/%d c=%d",
- rfd, p->more_l, p->more_r, cmp);
- (*kctrl->log_item)(LOG_DEBUG, buf, "");
-#endif
- p->hits++;
- return 1;
- }
- else
- {
-#if RSET_DEBUG
- logf (LOG_DEBUG, "r_read_and [%p] about to forward L "
- "m=%d/%d c=%d",
- rfd, p->more_l, p->more_r, cmp);
-#endif
- if (p->more_r && p->more_l)
- p->more_l = rset_forward(p->rfd_l, p->buf_l, p->buf_r);
- else
- return 0; /* no point in reading further */
- }
- }
- }
-#if RSET_DEBUG
- logf (LOG_DEBUG, "r_read_and [%p] reached its end",rfd);
-#endif
- return 0;
-}
-
-static int r_read_or (RSFD rfd, void *buf)
-{
- struct rset_bool_rfd *p=(struct rset_bool_rfd *)rfd->priv;
- const struct key_control *kctrl=rfd->rset->keycontrol;