2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.29 1995-10-13 16:01:49 adam
10 * Revision 1.28 1995/10/13 12:26:43 adam
11 * Optimization of truncation.
13 * Revision 1.27 1995/10/12 17:07:22 adam
16 * Revision 1.26 1995/10/12 12:40:54 adam
17 * Bug fixes in rpn_prox.
19 * Revision 1.25 1995/10/10 13:59:24 adam
20 * Function rset_open changed its wflag parameter to general flags.
22 * Revision 1.24 1995/10/09 16:18:37 adam
23 * Function dict_lookup_grep got extra client data parameter.
25 * Revision 1.23 1995/10/06 16:33:37 adam
26 * Use attribute mappings.
28 * Revision 1.22 1995/10/06 15:07:39 adam
29 * Structure 'local-number' handled.
31 * Revision 1.21 1995/10/06 13:52:06 adam
32 * Bug fixes. Handler may abort further scanning.
34 * Revision 1.20 1995/10/06 11:06:33 adam
35 * Scan entries include 'occurrences' now.
37 * Revision 1.19 1995/10/06 10:43:56 adam
38 * Scan added. 'occurrences' in scan entries not set yet.
40 * Revision 1.18 1995/10/04 16:57:20 adam
41 * Key input and merge sort in one pass.
43 * Revision 1.17 1995/10/04 12:55:17 adam
44 * Bug fix in ranked search. Use=Any keys inserted.
46 * Revision 1.16 1995/10/02 16:24:40 adam
47 * Use attribute actually used in search requests.
49 * Revision 1.15 1995/10/02 15:18:52 adam
50 * New member in recRetrieveCtrl: diagnostic.
52 * Revision 1.14 1995/09/28 12:10:32 adam
53 * Bug fixes. Field prefix used in queries.
55 * Revision 1.13 1995/09/18 14:17:50 adam
58 * Revision 1.12 1995/09/15 14:45:21 adam
62 * Revision 1.11 1995/09/14 11:53:27 adam
63 * First work on regular expressions/truncations.
65 * Revision 1.10 1995/09/11 15:23:26 adam
66 * More work on relevance search.
68 * Revision 1.9 1995/09/11 13:09:35 adam
69 * More work on relevance feedback.
71 * Revision 1.8 1995/09/08 14:52:27 adam
72 * Minor changes. Dictionary is lower case now.
74 * Revision 1.7 1995/09/07 13:58:36 adam
75 * New parameter: result-set file descriptor (RSFD) to support multiple
76 * positions within the same result-set.
77 * Boolean operators: and, or, not implemented.
78 * Result-set references.
80 * Revision 1.6 1995/09/06 16:11:18 adam
81 * Option: only one word key per file.
83 * Revision 1.5 1995/09/06 10:33:04 adam
84 * More work on present. Some log messages removed.
86 * Revision 1.4 1995/09/05 15:28:40 adam
87 * More work on search engine.
89 * Revision 1.3 1995/09/04 15:20:22 adam
92 * Revision 1.2 1995/09/04 12:33:43 adam
93 * Various cleanup. YAZ util used instead.
95 * Revision 1.1 1995/09/04 09:10:40 adam
96 * More work on index add/del/update.
97 * Merge sort implemented.
98 * Initial work on z39 server.
106 #include <attribute.h>
114 int index_word_prefix_map (char *string, oid_value attrSet, int attrUse)
118 logf (LOG_DEBUG, "oid_value attrSet = %d, attrUse = %d", attrSet, attrUse);
119 attp = att_getentbyatt (attrSet, attrUse);
122 logf (LOG_DEBUG, "ord=%d", attp->attset_ordinal);
123 return index_word_prefix (string, attp->attset_ordinal,
124 attp->local_attribute);
128 * attr_print: log attributes
130 static void attr_print (Z_AttributesPlusTerm *t)
133 for (of = 0; of < t->num_attributes; of++)
135 Z_AttributeElement *element;
136 element = t->attributeList[of];
138 switch (element->which)
140 case Z_AttributeValue_numeric:
141 logf (LOG_DEBUG, "attributeType=%d value=%d",
142 *element->attributeType,
143 *element->value.numeric);
145 case Z_AttributeValue_complex:
146 logf (LOG_DEBUG, "attributeType=%d complex",
147 *element->attributeType);
148 for (i = 0; i<element->value.complex->num_list; i++)
150 if (element->value.complex->list[i]->which ==
151 Z_StringOrNumeric_string)
152 logf (LOG_DEBUG, " string: '%s'",
153 element->value.complex->list[i]->u.string);
154 else if (element->value.complex->list[i]->which ==
155 Z_StringOrNumeric_numeric)
156 logf (LOG_DEBUG, " numeric: '%d'",
157 *element->value.complex->list[i]->u.numeric);
170 Z_AttributesPlusTerm *zapt;
173 static int attr_find (AttrType *src, oid_value *attributeSetP)
175 while (src->major < src->zapt->num_attributes)
177 Z_AttributeElement *element;
179 element = src->zapt->attributeList[src->major];
180 if (src->type == *element->attributeType)
182 switch (element->which)
184 case Z_AttributeValue_numeric:
186 if (element->attributeSet && attributeSetP)
190 attrset = oid_getentbyoid (element->attributeSet);
191 *attributeSetP = attrset->value;
193 return *element->value.numeric;
195 case Z_AttributeValue_complex:
196 if (src->minor >= element->value.complex->num_list ||
197 element->value.complex->list[src->minor]->which !=
198 Z_StringOrNumeric_numeric)
201 if (element->attributeSet && attributeSetP)
205 attrset = oid_getentbyoid (element->attributeSet);
206 *attributeSetP = attrset->value;
208 return *element->value.complex->list[src->minor-1]->u.numeric;
218 static void attr_init (AttrType *src, Z_AttributesPlusTerm *zapt,
232 int (*cmp)(const void *p1, const void *p2);
239 static void heap_swap (struct trunc_info *ti, int i1, int i2)
244 ti->ptr[i1] = ti->ptr[i2];
248 static void heap_delete (struct trunc_info *ti)
250 int cur = 1, child = 2;
252 heap_swap (ti, 1, ti->heapnum--);
253 while (child <= ti->heapnum) {
254 if (child < ti->heapnum &&
255 (*ti->cmp)(ti->heap[ti->ptr[child]],
256 ti->heap[ti->ptr[1+child]]) > 0)
258 if ((*ti->cmp)(ti->heap[ti->ptr[cur]],
259 ti->heap[ti->ptr[child]]) > 0)
261 heap_swap (ti, cur, child);
270 static void heap_insert (struct trunc_info *ti, const char *buf, int indx)
274 cur = ++(ti->heapnum);
275 memcpy (ti->heap[ti->ptr[cur]], buf, ti->keysize);
276 ti->indx[ti->ptr[cur]] = indx;
278 while (parent && (*ti->cmp)(ti->heap[ti->ptr[parent]],
279 ti->heap[ti->ptr[cur]]) > 0)
281 heap_swap (ti, cur, parent);
288 struct trunc_info *heap_init (int size, int key_size,
289 int (*cmp)(const void *p1, const void *p2))
291 struct trunc_info *ti = xmalloc (sizeof(*ti));
296 ti->keysize = key_size;
298 ti->indx = xmalloc (size * sizeof(*ti->indx));
299 ti->heap = xmalloc (size * sizeof(*ti->heap));
300 ti->ptr = xmalloc (size * sizeof(*ti->ptr));
301 ti->swapbuf = xmalloc (ti->keysize);
302 ti->tmpbuf = xmalloc (ti->keysize);
303 ti->buf = xmalloc (size * ti->keysize);
304 for (i = size; --i >= 0; )
307 ti->heap[i] = ti->buf + ti->keysize * i;
312 static void heap_close (struct trunc_info *ti)
322 static RSET rset_trunc_r (ISAM isam, ISAM_P *isam_p, int from, int to,
327 rset_temp_parms parms;
329 parms.key_size = sizeof(struct it_key);
330 result = rset_create (rset_kind_temp, &parms);
331 result_rsfd = rset_open (result, RSETF_WRITE|RSETF_SORT_SYSNO);
333 if (to - from > merge_chunk)
337 int i, i_add = (to-from)/merge_chunk + 1;
338 struct trunc_info *ti;
340 int rsmax = (to-from)/i_add + 1;
342 rset = xmalloc (sizeof(*rset) * rsmax);
343 rsfd = xmalloc (sizeof(*rsfd) * rsmax);
345 for (i = from; i < to; i += i_add)
348 rset[rscur] = rset_trunc_r (isam, isam_p, i, i+i_add,
351 rset[rscur] = rset_trunc_r (isam, isam_p, i, to,
355 ti = heap_init (rscur, sizeof(struct it_key), key_compare);
356 for (i = rscur; --i >= 0; )
358 rsfd[i] = rset_open (rset[i], RSETF_READ|RSETF_SORT_SYSNO);
359 if (rset_read (rset[i], rsfd[i], ti->tmpbuf))
360 heap_insert (ti, ti->tmpbuf, i);
363 rset_close (rset[i], rsfd[i]);
364 rset_delete (rset[i]);
369 int n = ti->indx[ti->ptr[1]];
371 rset_write (result, result_rsfd, ti->heap[ti->ptr[1]]);
375 if (!rset_read (rset[n], rsfd[n], ti->tmpbuf))
378 rset_close (rset[n], rsfd[n]);
379 rset_delete (rset[n]);
382 if ((*ti->cmp)(ti->tmpbuf, ti->heap[ti->ptr[1]]) > 1)
385 heap_insert (ti, ti->tmpbuf, n);
398 struct trunc_info *ti;
400 ispt = xmalloc (sizeof(*ispt) * (to-from));
402 ti = heap_init (to-from, sizeof(struct it_key),
404 for (i = to-from; --i >= 0; )
406 ispt[i] = is_position (isam, isam_p[from+i]);
407 if (is_readkey (ispt[i], ti->tmpbuf))
408 heap_insert (ti, ti->tmpbuf, i);
410 is_pt_free (ispt[i]);
414 int n = ti->indx[ti->ptr[1]];
416 rset_write (result, result_rsfd, ti->heap[ti->ptr[1]]);
419 if (is_readkey (ispt[n], ti->tmpbuf))
420 heap_insert (ti, ti->tmpbuf, n);
422 is_pt_free (ispt[n]);
426 if (!is_readkey (ispt[n], ti->tmpbuf))
429 is_pt_free (ispt[n]);
432 if ((*ti->cmp)(ti->tmpbuf, ti->heap[ti->ptr[1]]) > 1)
435 heap_insert (ti, ti->tmpbuf, n);
444 rset_close (result, result_rsfd);
448 static int isam_trunc_cmp (const void *p1, const void *p2)
450 ISAM_P i1 = *(ISAM_P*) p1;
451 ISAM_P i2 = *(ISAM_P*) p2;
454 d = is_type (i1) - is_type (i2);
457 return is_block (i1) - is_block (i2);
460 static RSET rset_trunc (ISAM isam, ISAM_P *isam_p, int no)
463 qsort (isam_p, no, sizeof(*isam_p), isam_trunc_cmp);
464 return rset_trunc_r (isam, isam_p, 0, no, 100);
473 static void add_isam_p (const char *info, struct grep_info *p)
475 if (p->isam_p_indx == p->isam_p_size)
477 ISAM_P *new_isam_p_buf;
479 p->isam_p_size = 2*p->isam_p_size + 100;
480 new_isam_p_buf = xmalloc (sizeof(*new_isam_p_buf) *
484 memcpy (new_isam_p_buf, p->isam_p_buf,
485 p->isam_p_indx * sizeof(*p->isam_p_buf));
486 xfree (p->isam_p_buf);
488 p->isam_p_buf = new_isam_p_buf;
490 assert (*info == sizeof(*p->isam_p_buf));
491 memcpy (p->isam_p_buf + p->isam_p_indx, info+1, sizeof(*p->isam_p_buf));
495 static int grep_handle (Dict_char *name, const char *info, void *p)
497 logf (LOG_DEBUG, "dict name: %s", name);
498 add_isam_p (info, p);
502 static void gen_regular_ge (char *dst, int val)
512 while ((d=(val % (w*10))/w))
514 sprintf (dst + dst_p, "%d", val);
516 dst_p = strlen(dst) - pos - 1;
519 dst[dst_p++] = d +'1';
524 for (i = 0; i<pos; i++)
538 for (i = 0; i<pos; i++)
539 strcat (dst, "[0-9]");
540 strcat (dst, "[0-9]*");
543 static int trunc_term (ZServerInfo *zi, Z_AttributesPlusTerm *zapt,
544 const char *term_sub,
545 oid_value attributeSet, struct grep_info *grep_info)
547 char term_dict[10*IT_MAX_WORD+2];
551 int truncation_value;
556 oid_value curAttributeSet = attributeSet;
558 attr_init (&use, zapt, 1);
559 use_value = attr_find (&use, &curAttributeSet);
560 logf (LOG_DEBUG, "use value %d", use_value);
561 attr_init (&truncation, zapt, 5);
562 truncation_value = attr_find (&truncation, NULL);
563 logf (LOG_DEBUG, "truncation value %d", truncation_value);
565 attr_init (&relation, zapt, 2);
566 relation_value = attr_find (&relation, NULL);
570 i = index_word_prefix_map (term_dict, curAttributeSet, use_value);
576 switch (relation_value)
582 logf (LOG_LOG, "Relation ge");
583 gen_regular_ge (term_dict + strlen(term_dict), atoi(term_sub));
584 logf (LOG_LOG, "dict_lookup_grep: %s", term_dict);
585 dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info, grep_handle);
586 logf (LOG_LOG, "%d positions", grep_info->isam_p_indx);
589 logf (LOG_LOG, "Relation gt");
590 gen_regular_ge (term_dict + strlen(term_dict), atoi(term_sub)+1);
591 logf (LOG_LOG, "dict_lookup_grep: %s", term_dict);
592 dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info, grep_handle);
593 logf (LOG_LOG, "%d positions", grep_info->isam_p_indx);
596 switch (truncation_value)
598 case -1: /* not specified */
599 case 100: /* do not truncate */
600 strcat (term_dict, term_sub);
601 logf (LOG_DEBUG, "dict_lookup: %s", term_dict);
602 if ((info = dict_lookup (zi->wordDict, term_dict)))
603 add_isam_p (info, grep_info);
605 case 1: /* right truncation */
606 strcat (term_dict, term_sub);
607 strcat (term_dict, ".*");
608 dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info, grep_handle);
610 case 2: /* left truncation */
611 case 3: /* left&right truncation */
614 case 101: /* process # in term */
615 for (j = strlen(term_dict), i = 0; term_sub[i] && i < 2; i++)
616 term_dict[j++] = term_sub[i];
617 for (; term_sub[i]; i++)
618 if (term_sub[i] == '#')
620 term_dict[j++] = '.';
621 term_dict[j++] = '*';
624 term_dict[j++] = term_sub[i];
626 dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info, grep_handle);
628 case 102: /* regular expression */
629 strcat (term_dict, term_sub);
630 dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info, grep_handle);
633 logf (LOG_LOG, "%d positions", grep_info->isam_p_indx);
637 static void trans_term (ZServerInfo *zi, Z_AttributesPlusTerm *zapt,
641 Z_Term *term = zapt->term;
643 sizez = term->u.general->len;
644 if (sizez > IT_MAX_WORD)
646 for (i = 0; i < sizez; i++)
647 termz[i] = index_char_cvt (term->u.general->buf[i]);
651 static RSET rpn_search_APT_relevance (ZServerInfo *zi,
652 Z_AttributesPlusTerm *zapt,
653 oid_value attributeSet)
655 rset_relevance_parms parms;
656 char termz[IT_MAX_WORD+1];
657 char term_sub[IT_MAX_WORD+1];
658 struct grep_info grep_info;
659 char *p0 = termz, *p1 = NULL;
662 parms.key_size = sizeof(struct it_key);
664 parms.cmp = key_compare;
665 parms.is = zi->wordIsam;
667 if (zapt->term->which != Z_Term_general)
672 trans_term (zi, zapt, termz);
673 grep_info.isam_p_indx = 0;
674 grep_info.isam_p_size = 0;
675 grep_info.isam_p_buf = NULL;
678 if ((p1 = strchr (p0, ' ')))
680 memcpy (term_sub, p0, p1-p0);
681 term_sub[p1-p0] = '\0';
684 strcpy (term_sub, p0);
685 if (trunc_term (zi, zapt, term_sub, attributeSet, &grep_info))
693 parms.isam_positions = grep_info.isam_p_buf;
694 parms.no_isam_positions = grep_info.isam_p_indx;
695 if (grep_info.isam_p_indx > 0)
696 result = rset_create (rset_kind_relevance, &parms);
698 result = rset_create (rset_kind_null, NULL);
699 xfree (grep_info.isam_p_buf);
703 static RSET rpn_search_APT_word (ZServerInfo *zi,
704 Z_AttributesPlusTerm *zapt,
705 oid_value attributeSet)
707 rset_isam_parms parms;
708 char termz[IT_MAX_WORD+1];
709 struct grep_info grep_info;
712 if (zapt->term->which != Z_Term_general)
717 trans_term (zi, zapt, termz);
719 grep_info.isam_p_indx = 0;
720 grep_info.isam_p_size = 0;
721 grep_info.isam_p_buf = NULL;
723 if (trunc_term (zi, zapt, termz, attributeSet, &grep_info))
725 if (grep_info.isam_p_indx < 1)
726 result = rset_create (rset_kind_null, NULL);
727 else if (grep_info.isam_p_indx == 1)
729 parms.is = zi->wordIsam;
730 parms.pos = *grep_info.isam_p_buf;
731 result = rset_create (rset_kind_isam, &parms);
734 result = rset_trunc (zi->wordIsam, grep_info.isam_p_buf,
735 grep_info.isam_p_indx);
736 xfree (grep_info.isam_p_buf);
740 static RSET rpn_prox (RSET *rset, int rset_no)
748 rset_temp_parms parms;
750 rsfd = xmalloc (sizeof(*rsfd)*rset_no);
751 more = xmalloc (sizeof(*more)*rset_no);
752 buf = xmalloc (sizeof(*buf)*rset_no);
754 for (i = 0; i<rset_no; i++)
756 buf[i] = xmalloc (sizeof(**buf));
757 rsfd[i] = rset_open (rset[i], RSETF_READ|RSETF_SORT_SYSNO);
758 if (!(more[i] = rset_read (rset[i], rsfd[i], buf[i])))
762 rset_close (rset[i], rsfd[i]);
769 return rset_create (rset_kind_null, NULL);
772 parms.key_size = sizeof (struct it_key);
773 result = rset_create (rset_kind_temp, &parms);
774 rsfd_result = rset_open (result, RSETF_WRITE|RSETF_SORT_SYSNO);
778 for (i = 1; i<rset_no; i++)
787 cmp = key_compare (buf[i], buf[i-1]);
790 more[i-1] = rset_read (rset[i-1], rsfd[i-1], buf[i-1]);
795 if (buf[i-1]->seqno+1 != buf[i]->seqno)
797 more[i-1] = rset_read (rset[i-1], rsfd[i-1], buf[i-1]);
803 more[i] = rset_read (rset[i], rsfd[i], buf[i]);
809 rset_write (result, rsfd_result, buf[0]);
810 more[0] = rset_read (*rset, *rsfd, *buf);
814 for (i = 0; i<rset_no; i++)
816 rset_close (rset[i], rsfd[i]);
819 rset_close (result, rsfd_result);
826 static RSET rpn_search_APT_phrase (ZServerInfo *zi,
827 Z_AttributesPlusTerm *zapt,
828 oid_value attributeSet)
830 char termz[IT_MAX_WORD+1];
831 char term_sub[IT_MAX_WORD+1];
832 char *p0 = termz, *p1 = NULL;
833 RSET rset[60], result;
835 struct grep_info grep_info;
837 if (zapt->term->which != Z_Term_general)
842 trans_term (zi, zapt, termz);
844 grep_info.isam_p_size = 0;
845 grep_info.isam_p_buf = NULL;
849 if ((p1 = strchr (p0, ' ')))
851 memcpy (term_sub, p0, p1-p0);
852 term_sub[p1-p0] = '\0';
855 strcpy (term_sub, p0);
857 grep_info.isam_p_indx = 0;
858 if (trunc_term (zi, zapt, term_sub, attributeSet, &grep_info))
860 if (grep_info.isam_p_indx == 0)
861 rset[rset_no] = rset_create (rset_kind_null, NULL);
862 else if (grep_info.isam_p_indx > 1)
863 rset[rset_no] = rset_trunc (zi->wordIsam,
864 grep_info.isam_p_buf,
865 grep_info.isam_p_indx);
868 rset_isam_parms parms;
870 parms.is = zi->wordIsam;
871 parms.pos = *grep_info.isam_p_buf;
872 rset[rset_no] = rset_create (rset_kind_isam, &parms);
874 assert (rset[rset_no]);
875 if (++rset_no >= sizeof(rset)/sizeof(*rset))
883 xfree (grep_info.isam_p_buf);
885 return rset_create (rset_kind_null, NULL);
886 else if (rset_no == 1)
889 result = rpn_prox (rset, rset_no);
890 for (i = 0; i<rset_no; i++)
891 rset_delete (rset[i]);
895 static RSET rpn_search_APT_local (ZServerInfo *zi, Z_AttributesPlusTerm *zapt,
896 oid_value attributeSet)
901 rset_temp_parms parms;
902 char termz[IT_MAX_WORD+1];
904 if (zapt->term->which != Z_Term_general)
909 parms.key_size = sizeof (struct it_key);
910 result = rset_create (rset_kind_temp, &parms);
911 rsfd = rset_open (result, RSETF_WRITE|RSETF_SORT_SYSNO);
913 trans_term (zi, zapt, termz);
914 key.sysno = atoi (termz);
917 rset_write (result, rsfd, &key);
918 rset_close (result, rsfd);
922 static RSET rpn_search_APT (ZServerInfo *zi, Z_AttributesPlusTerm *zapt,
923 oid_value attributeSet)
927 int relation_value, structure_value;
929 attr_init (&relation, zapt, 2);
930 attr_init (&structure, zapt, 4);
932 relation_value = attr_find (&relation, NULL);
933 structure_value = attr_find (&structure, NULL);
934 switch (structure_value)
937 if (relation_value == 102) /* relevance relation */
938 return rpn_search_APT_relevance (zi, zapt, attributeSet);
939 return rpn_search_APT_phrase (zi, zapt, attributeSet);
941 if (relation_value == 102) /* relevance relation */
942 return rpn_search_APT_relevance (zi, zapt, attributeSet);
943 return rpn_search_APT_phrase (zi, zapt, attributeSet);
946 if (relation_value == 102) /* relevance relation */
947 return rpn_search_APT_relevance (zi, zapt, attributeSet);
948 return rpn_search_APT_word (zi, zapt, attributeSet);
953 case 5: /* date - normalized */
955 case 6: /* word list */
956 return rpn_search_APT_relevance (zi, zapt, attributeSet);
957 case 100: /* date - un-normalized */
959 case 101: /* name - normalized */
961 case 102: /* date - un-normalized */
963 case 103: /* structure */
967 case 105: /* free-form-text */
968 return rpn_search_APT_relevance (zi, zapt, attributeSet);
969 case 106: /* document-text */
970 return rpn_search_APT_relevance (zi, zapt, attributeSet);
971 case 107: /* local-number */
972 return rpn_search_APT_local (zi, zapt, attributeSet);
973 case 108: /* string */
974 return rpn_search_APT_word (zi, zapt, attributeSet);
975 case 109: /* numeric string */
982 static RSET rpn_search_ref (ZServerInfo *zi, Z_ResultSetId *resultSetId)
986 if (!(s = resultSetGet (zi, resultSetId)))
987 return rset_create (rset_kind_null, NULL);
991 static RSET rpn_search_structure (ZServerInfo *zi, Z_RPNStructure *zs,
992 oid_value attributeSet)
995 if (zs->which == Z_RPNStructure_complex)
997 rset_bool_parms bool_parms;
999 bool_parms.rset_l = rpn_search_structure (zi, zs->u.complex->s1,
1001 if (bool_parms.rset_l == NULL)
1003 bool_parms.rset_r = rpn_search_structure (zi, zs->u.complex->s2,
1005 if (bool_parms.rset_r == NULL)
1007 rset_delete (bool_parms.rset_l);
1010 bool_parms.key_size = sizeof(struct it_key);
1011 bool_parms.cmp = key_compare;
1013 switch (zs->u.complex->operator->which)
1015 case Z_Operator_and:
1016 r = rset_create (rset_kind_and, &bool_parms);
1019 r = rset_create (rset_kind_or, &bool_parms);
1021 case Z_Operator_and_not:
1022 r = rset_create (rset_kind_not, &bool_parms);
1028 else if (zs->which == Z_RPNStructure_simple)
1030 if (zs->u.simple->which == Z_Operand_APT)
1032 logf (LOG_DEBUG, "rpn_search_APT");
1033 r = rpn_search_APT (zi, zs->u.simple->u.attributesPlusTerm,
1036 else if (zs->u.simple->which == Z_Operand_resultSetId)
1038 logf (LOG_DEBUG, "rpn_search_ref");
1039 r = rpn_search_ref (zi, zs->u.simple->u.resultSetId);
1053 static void count_set (RSET r, int *count)
1059 logf (LOG_DEBUG, "rpn_save_set");
1061 rfd = rset_open (r, RSETF_READ|RSETF_SORT_SYSNO);
1062 while (rset_read (r, rfd, &key))
1064 if (key.sysno != psysno)
1070 rset_close (r, rfd);
1071 logf (LOG_DEBUG, "%d distinct sysnos", *count);
1074 int rpn_search (ZServerInfo *zi,
1075 Z_RPNQuery *rpn, int num_bases, char **basenames,
1076 const char *setname, int *hits)
1080 oid_value attributeSet;
1083 zi->errString = NULL;
1085 attrset = oid_getentbyoid (rpn->attributeSetId);
1086 attributeSet = attrset->value;
1088 rset = rpn_search_structure (zi, rpn->RPNStructure, attributeSet);
1091 count_set (rset, hits);
1092 resultSetAdd (zi, setname, 1, rset);
1094 logf (LOG_DEBUG, "search error: %d", zi->errCode);
1099 struct scan_entry *list;
1106 static int scan_handle (Dict_char *name, const char *info, int pos,
1109 int len_prefix, idx;
1112 struct scan_info *scan_info = client;
1114 rset_isam_parms parms;
1116 len_prefix = strlen(scan_info->prefix);
1117 if (memcmp (name, scan_info->prefix, len_prefix))
1120 idx = scan_info->after - pos + scan_info->before;
1123 scan_info->list[idx].term = odr_malloc (scan_info->odr,
1124 strlen(name + len_prefix)+1);
1125 strcpy (scan_info->list[idx].term, name + len_prefix);
1126 assert (*info == sizeof(isam_p));
1127 memcpy (&isam_p, info+1, sizeof(isam_p));
1128 parms.is = scan_info->isam;
1131 rset = rset_create (rset_kind_isam, &parms);
1132 count_set (rset, &scan_info->list[idx].occurrences);
1135 scan_info->list[idx].occurrences = 1;
1137 logf (LOG_DEBUG, "pos=%3d idx=%3d name=%s", pos, idx, name);
1141 int rpn_scan (ZServerInfo *zi, ODR odr, Z_AttributesPlusTerm *zapt,
1142 int *position, int *num_entries, struct scan_entry **list,
1146 int pos = *position;
1147 int num = *num_entries;
1150 char termz[IT_MAX_WORD+20];
1153 Z_Term *term = zapt->term;
1154 struct scan_info scan_info;
1156 logf (LOG_DEBUG, "scan, position = %d, num = %d", pos, num);
1157 scan_info.before = before = pos-1;
1158 scan_info.after = after = 1+num-pos;
1159 scan_info.odr = odr;
1161 logf (LOG_DEBUG, "scan, before = %d, after = %d", before, after);
1163 scan_info.isam = zi->wordIsam;
1164 scan_info.list = odr_malloc (odr, (before+after)*sizeof(*scan_info.list));
1165 for (j = 0; j<before+after; j++)
1166 scan_info.list[j].term = NULL;
1167 attr_init (&use, zapt, 1);
1168 use_value = attr_find (&use, NULL);
1169 logf (LOG_DEBUG, "use value %d", use_value);
1171 if (use_value == -1)
1173 i = index_word_prefix (termz, 1, use_value);
1174 strcpy (scan_info.prefix, termz);
1175 sizez = term->u.general->len;
1176 if (sizez > IT_MAX_WORD)
1177 sizez = IT_MAX_WORD;
1178 for (j = 0; j<sizez; j++)
1179 termz[j+i] = index_char_cvt (term->u.general->buf[j]);
1182 dict_scan (zi->wordDict, termz, &before, &after, &scan_info, scan_handle);
1184 *status = BEND_SCAN_SUCCESS;
1186 for (i = 0; i<scan_info.after; i++)
1187 if (scan_info.list[scan_info.before+scan_info.after-i-1].term)
1191 *status = BEND_SCAN_PARTIAL;
1193 for (i = 0; i<scan_info.before; i++)
1194 if (scan_info.list[i].term)
1197 *status = BEND_SCAN_PARTIAL;
1201 *list = scan_info.list+i; /* list is set to first 'real' entry */
1203 if (*num_entries == 0) /* signal 'unsupported use-attribute' */
1204 zi->errCode = 114; /* if no entries was found */
1205 logf (LOG_DEBUG, "position = %d, num_entries = %d",
1206 *position, *num_entries);
1208 logf (LOG_DEBUG, "scan error: %d", zi->errCode);