- logf(LOG_DEBUG,
- "isamb_pp_forward: skipping block on level %d, noting "
- "on %d (%d)",
- pp->level, pp->maxlevel - pp->level-1 ,
- pp->skipped_nodes[pp->maxlevel - pp->level-1 ]);
-#endif
- /* 0 is always leafs, 1 is one level above leafs etc, no
- * matter how high tree */
- }
- } /* not on a leaf */
- else
- { /* on a leaf */
- if (p->offset == p->size) {
- descending = 0;
- }
- else
- {
- assert (p->offset < p->size);
- src = p->bytes + p->offset;
- dst=buf;
- (*pp->isamb->method->code_item)(ISAMC_DECODE, p->decodeClientData,
- &dst, &src);
- p->offset = src - (char*) p->bytes;
- if (untilbuf)
- cmp=(*pp->isamb->method->compare_item)(untilbuf,buf);
- else
- cmp=-2;
-#if ISAMB_DEBUG
- logf(LOG_DEBUG,"isamb_pp_forward on a leaf. cmp=%d",
- cmp);
- (*pp->isamb->method->log_item)(LOG_DEBUG, buf, "");
-#endif
- if (cmp <2)
- {
-#if ISAMB_DEBUG
- if (untilbuf)
- {
- (*pp->isamb->method->log_item)(
- LOG_DEBUG, buf, "isamb_pp_forward returning 1");
- }
- else
- {
- (*pp->isamb->method->log_item)(
- LOG_DEBUG, buf, "isamb_pp_read returning 1 (fwd)");
- }
-#endif
- pp->returned_numbers++;
- return 1;
- }
- else
- pp->skipped_numbers++;
- }
- } /* leaf */
- } /* main loop */
-}
-
-#elif NEW_FORWARD == 2
-
-int isamb_pp_forward (ISAMB_PP pp, void *buf, const void *untilb)
-{
- char *dst = buf;
- char *src;
- struct ISAMB_block *p = pp->block[pp->level];
- if (!p)
- return 0;
-
- while (p->offset == p->size)
- {
- int pos, item_len;
- while (p->offset == p->size)
- {
- if (pp->level == 0)
- return 0;
- close_block (pp->isamb, pp->block[pp->level]);
- pp->block[pp->level] = 0;
- (pp->level)--;
- p = pp->block[pp->level];
- assert (!p->leaf);
- }
-
- src = p->bytes + p->offset;
-
- decode_ptr (&src, &item_len);
- src += item_len;
- decode_ptr (&src, &pos);
-
- p->offset = src - (char*) p->bytes;
-
- src = p->bytes + p->offset;
-
- while(1)
- {
- if (!untilb || p->offset == p->size)
- break;
- assert(p->offset < p->size);
- decode_ptr (&src, &item_len);
- if ((*pp->isamb->method->compare_item)(untilb, src) <= 1)
- break;
- src += item_len;
- decode_ptr (&src, &pos);
- p->offset = src - (char*) p->bytes;
- }
-
- pp->level++;
-
- while (1)
- {
- pp->block[pp->level] = p = open_block (pp->isamb, pos);
-
- pp->total_size += p->size;
- pp->no_blocks++;
-
- if (p->leaf)
- {
- break;
- }
-
- src = p->bytes + p->offset;
- while(1)
- {
- decode_ptr (&src, &pos);
- p->offset = src - (char*) p->bytes;
-
- if (!untilb || p->offset == p->size)
- break;
- assert(p->offset < p->size);
- decode_ptr (&src, &item_len);
- if ((*pp->isamb->method->compare_item)(untilb, src) <= 1)
- break;
- src += item_len;
- }
- pp->level++;
- }
- }
- assert (p->offset < p->size);
- assert (p->leaf);
- src = p->bytes + p->offset;
- (*pp->isamb->method->code_item)(ISAMC_DECODE, p->decodeClientData,
- &dst, &src);
- p->offset = src - (char*) p->bytes;
- /* key_logdump_txt(LOG_DEBUG,buf, "isamb_pp_read returning 1"); */
- return 1;
-}
-