2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.31 1995-10-17 18:02:10 adam
8 * New feature: databases. Implemented as prefix to words in dictionary.
10 * Revision 1.30 1995/10/16 09:32:38 adam
11 * More work on relational op.
13 * Revision 1.29 1995/10/13 16:01:49 adam
16 * Revision 1.28 1995/10/13 12:26:43 adam
17 * Optimization of truncation.
19 * Revision 1.27 1995/10/12 17:07:22 adam
22 * Revision 1.26 1995/10/12 12:40:54 adam
23 * Bug fixes in rpn_prox.
25 * Revision 1.25 1995/10/10 13:59:24 adam
26 * Function rset_open changed its wflag parameter to general flags.
28 * Revision 1.24 1995/10/09 16:18:37 adam
29 * Function dict_lookup_grep got extra client data parameter.
31 * Revision 1.23 1995/10/06 16:33:37 adam
32 * Use attribute mappings.
34 * Revision 1.22 1995/10/06 15:07:39 adam
35 * Structure 'local-number' handled.
37 * Revision 1.21 1995/10/06 13:52:06 adam
38 * Bug fixes. Handler may abort further scanning.
40 * Revision 1.20 1995/10/06 11:06:33 adam
41 * Scan entries include 'occurrences' now.
43 * Revision 1.19 1995/10/06 10:43:56 adam
44 * Scan added. 'occurrences' in scan entries not set yet.
46 * Revision 1.18 1995/10/04 16:57:20 adam
47 * Key input and merge sort in one pass.
49 * Revision 1.17 1995/10/04 12:55:17 adam
50 * Bug fix in ranked search. Use=Any keys inserted.
52 * Revision 1.16 1995/10/02 16:24:40 adam
53 * Use attribute actually used in search requests.
55 * Revision 1.15 1995/10/02 15:18:52 adam
56 * New member in recRetrieveCtrl: diagnostic.
58 * Revision 1.14 1995/09/28 12:10:32 adam
59 * Bug fixes. Field prefix used in queries.
61 * Revision 1.13 1995/09/18 14:17:50 adam
64 * Revision 1.12 1995/09/15 14:45:21 adam
68 * Revision 1.11 1995/09/14 11:53:27 adam
69 * First work on regular expressions/truncations.
71 * Revision 1.10 1995/09/11 15:23:26 adam
72 * More work on relevance search.
74 * Revision 1.9 1995/09/11 13:09:35 adam
75 * More work on relevance feedback.
77 * Revision 1.8 1995/09/08 14:52:27 adam
78 * Minor changes. Dictionary is lower case now.
80 * Revision 1.7 1995/09/07 13:58:36 adam
81 * New parameter: result-set file descriptor (RSFD) to support multiple
82 * positions within the same result-set.
83 * Boolean operators: and, or, not implemented.
84 * Result-set references.
86 * Revision 1.6 1995/09/06 16:11:18 adam
87 * Option: only one word key per file.
89 * Revision 1.5 1995/09/06 10:33:04 adam
90 * More work on present. Some log messages removed.
92 * Revision 1.4 1995/09/05 15:28:40 adam
93 * More work on search engine.
95 * Revision 1.3 1995/09/04 15:20:22 adam
98 * Revision 1.2 1995/09/04 12:33:43 adam
99 * Various cleanup. YAZ util used instead.
101 * Revision 1.1 1995/09/04 09:10:40 adam
102 * More work on index add/del/update.
103 * Merge sort implemented.
104 * Initial work on z39 server.
112 #include <attribute.h>
120 int index_word_prefix_map (char *string, oid_value attrSet, int attrUse,
121 int num_bases, char **basenames)
125 logf (LOG_DEBUG, "oid_value attrSet = %d, attrUse = %d", attrSet, attrUse);
126 attp = att_getentbyatt (attrSet, attrUse);
129 logf (LOG_DEBUG, "ord=%d", attp->attset_ordinal);
130 return index_word_prefix (string, attp->attset_ordinal,
131 attp->local_attribute,
132 num_bases, basenames);
136 * attr_print: log attributes
138 static void attr_print (Z_AttributesPlusTerm *t)
141 for (of = 0; of < t->num_attributes; of++)
143 Z_AttributeElement *element;
144 element = t->attributeList[of];
146 switch (element->which)
148 case Z_AttributeValue_numeric:
149 logf (LOG_DEBUG, "attributeType=%d value=%d",
150 *element->attributeType,
151 *element->value.numeric);
153 case Z_AttributeValue_complex:
154 logf (LOG_DEBUG, "attributeType=%d complex",
155 *element->attributeType);
156 for (i = 0; i<element->value.complex->num_list; i++)
158 if (element->value.complex->list[i]->which ==
159 Z_StringOrNumeric_string)
160 logf (LOG_DEBUG, " string: '%s'",
161 element->value.complex->list[i]->u.string);
162 else if (element->value.complex->list[i]->which ==
163 Z_StringOrNumeric_numeric)
164 logf (LOG_DEBUG, " numeric: '%d'",
165 *element->value.complex->list[i]->u.numeric);
178 Z_AttributesPlusTerm *zapt;
181 static int attr_find (AttrType *src, oid_value *attributeSetP)
183 while (src->major < src->zapt->num_attributes)
185 Z_AttributeElement *element;
187 element = src->zapt->attributeList[src->major];
188 if (src->type == *element->attributeType)
190 switch (element->which)
192 case Z_AttributeValue_numeric:
194 if (element->attributeSet && attributeSetP)
198 attrset = oid_getentbyoid (element->attributeSet);
199 *attributeSetP = attrset->value;
201 return *element->value.numeric;
203 case Z_AttributeValue_complex:
204 if (src->minor >= element->value.complex->num_list ||
205 element->value.complex->list[src->minor]->which !=
206 Z_StringOrNumeric_numeric)
209 if (element->attributeSet && attributeSetP)
213 attrset = oid_getentbyoid (element->attributeSet);
214 *attributeSetP = attrset->value;
216 return *element->value.complex->list[src->minor-1]->u.numeric;
226 static void attr_init (AttrType *src, Z_AttributesPlusTerm *zapt,
240 int (*cmp)(const void *p1, const void *p2);
247 static void heap_swap (struct trunc_info *ti, int i1, int i2)
252 ti->ptr[i1] = ti->ptr[i2];
256 static void heap_delete (struct trunc_info *ti)
258 int cur = 1, child = 2;
260 heap_swap (ti, 1, ti->heapnum--);
261 while (child <= ti->heapnum) {
262 if (child < ti->heapnum &&
263 (*ti->cmp)(ti->heap[ti->ptr[child]],
264 ti->heap[ti->ptr[1+child]]) > 0)
266 if ((*ti->cmp)(ti->heap[ti->ptr[cur]],
267 ti->heap[ti->ptr[child]]) > 0)
269 heap_swap (ti, cur, child);
278 static void heap_insert (struct trunc_info *ti, const char *buf, int indx)
282 cur = ++(ti->heapnum);
283 memcpy (ti->heap[ti->ptr[cur]], buf, ti->keysize);
284 ti->indx[ti->ptr[cur]] = indx;
286 while (parent && (*ti->cmp)(ti->heap[ti->ptr[parent]],
287 ti->heap[ti->ptr[cur]]) > 0)
289 heap_swap (ti, cur, parent);
296 struct trunc_info *heap_init (int size, int key_size,
297 int (*cmp)(const void *p1, const void *p2))
299 struct trunc_info *ti = xmalloc (sizeof(*ti));
304 ti->keysize = key_size;
306 ti->indx = xmalloc (size * sizeof(*ti->indx));
307 ti->heap = xmalloc (size * sizeof(*ti->heap));
308 ti->ptr = xmalloc (size * sizeof(*ti->ptr));
309 ti->swapbuf = xmalloc (ti->keysize);
310 ti->tmpbuf = xmalloc (ti->keysize);
311 ti->buf = xmalloc (size * ti->keysize);
312 for (i = size; --i >= 0; )
315 ti->heap[i] = ti->buf + ti->keysize * i;
320 static void heap_close (struct trunc_info *ti)
330 static RSET rset_trunc_r (ISAM isam, ISAM_P *isam_p, int from, int to,
335 rset_temp_parms parms;
337 parms.key_size = sizeof(struct it_key);
338 result = rset_create (rset_kind_temp, &parms);
339 result_rsfd = rset_open (result, RSETF_WRITE|RSETF_SORT_SYSNO);
341 if (to - from > merge_chunk)
345 int i, i_add = (to-from)/merge_chunk + 1;
346 struct trunc_info *ti;
348 int rsmax = (to-from)/i_add + 1;
350 rset = xmalloc (sizeof(*rset) * rsmax);
351 rsfd = xmalloc (sizeof(*rsfd) * rsmax);
353 for (i = from; i < to; i += i_add)
356 rset[rscur] = rset_trunc_r (isam, isam_p, i, i+i_add,
359 rset[rscur] = rset_trunc_r (isam, isam_p, i, to,
363 ti = heap_init (rscur, sizeof(struct it_key), key_compare);
364 for (i = rscur; --i >= 0; )
366 rsfd[i] = rset_open (rset[i], RSETF_READ|RSETF_SORT_SYSNO);
367 if (rset_read (rset[i], rsfd[i], ti->tmpbuf))
368 heap_insert (ti, ti->tmpbuf, i);
371 rset_close (rset[i], rsfd[i]);
372 rset_delete (rset[i]);
377 int n = ti->indx[ti->ptr[1]];
379 rset_write (result, result_rsfd, ti->heap[ti->ptr[1]]);
383 if (!rset_read (rset[n], rsfd[n], ti->tmpbuf))
386 rset_close (rset[n], rsfd[n]);
387 rset_delete (rset[n]);
390 if ((*ti->cmp)(ti->tmpbuf, ti->heap[ti->ptr[1]]) > 1)
393 heap_insert (ti, ti->tmpbuf, n);
406 struct trunc_info *ti;
408 ispt = xmalloc (sizeof(*ispt) * (to-from));
410 ti = heap_init (to-from, sizeof(struct it_key),
412 for (i = to-from; --i >= 0; )
414 ispt[i] = is_position (isam, isam_p[from+i]);
415 if (is_readkey (ispt[i], ti->tmpbuf))
416 heap_insert (ti, ti->tmpbuf, i);
418 is_pt_free (ispt[i]);
422 int n = ti->indx[ti->ptr[1]];
424 rset_write (result, result_rsfd, ti->heap[ti->ptr[1]]);
426 /* section that preserve all keys */
428 if (is_readkey (ispt[n], ti->tmpbuf))
429 heap_insert (ti, ti->tmpbuf, n);
431 is_pt_free (ispt[n]);
433 /* section that preserve all keys with unique sysnos */
436 if (!is_readkey (ispt[n], ti->tmpbuf))
439 is_pt_free (ispt[n]);
442 if ((*ti->cmp)(ti->tmpbuf, ti->heap[ti->ptr[1]]) > 1)
445 heap_insert (ti, ti->tmpbuf, n);
454 rset_close (result, result_rsfd);
458 static int isam_trunc_cmp (const void *p1, const void *p2)
460 ISAM_P i1 = *(ISAM_P*) p1;
461 ISAM_P i2 = *(ISAM_P*) p2;
464 d = is_type (i1) - is_type (i2);
467 return is_block (i1) - is_block (i2);
470 static RSET rset_trunc (ISAM isam, ISAM_P *isam_p, int no)
473 qsort (isam_p, no, sizeof(*isam_p), isam_trunc_cmp);
474 return rset_trunc_r (isam, isam_p, 0, no, 100);
483 static void add_isam_p (const char *info, struct grep_info *p)
485 if (p->isam_p_indx == p->isam_p_size)
487 ISAM_P *new_isam_p_buf;
489 p->isam_p_size = 2*p->isam_p_size + 100;
490 new_isam_p_buf = xmalloc (sizeof(*new_isam_p_buf) *
494 memcpy (new_isam_p_buf, p->isam_p_buf,
495 p->isam_p_indx * sizeof(*p->isam_p_buf));
496 xfree (p->isam_p_buf);
498 p->isam_p_buf = new_isam_p_buf;
500 assert (*info == sizeof(*p->isam_p_buf));
501 memcpy (p->isam_p_buf + p->isam_p_indx, info+1, sizeof(*p->isam_p_buf));
505 static int grep_handle (Dict_char *name, const char *info, void *p)
507 logf (LOG_DEBUG, "dict name: %s", name);
508 add_isam_p (info, p);
512 static void gen_regular_rel (char *dst, int val, int islt)
520 sprintf (numstr, "%d", val);
521 for (w = strlen(numstr); --w >= 0; pos++)
540 strcpy (dst + dst_p, numstr);
541 dst_p = strlen(dst) - pos - 1;
569 for (i = 0; i<pos; i++)
582 for (i=1; i<pos; i++)
583 strcat (dst, "[0-9]?");
587 for (i = 0; i <= pos; i++)
588 strcat (dst, "[0-9]");
589 strcat (dst, "[0-9]*");
594 static int relational_term (ZServerInfo *zi, Z_AttributesPlusTerm *zapt,
595 const char *term_sub,
597 oid_value attributeSet,
598 struct grep_info *grep_info)
605 attr_init (&relation, zapt, 2);
606 relation_value = attr_find (&relation, NULL);
607 term_value = atoi (term_sub);
609 switch (relation_value)
614 logf (LOG_DEBUG, "Relation <");
615 gen_regular_rel (term_dict + strlen(term_dict), term_value-1, 1);
620 logf (LOG_DEBUG, "Relation <=");
621 gen_regular_rel (term_dict + strlen(term_dict), term_value, 1);
626 logf (LOG_DEBUG, "Relation >=");
627 gen_regular_rel (term_dict + strlen(term_dict), term_value, 0);
632 logf (LOG_DEBUG, "Relation >");
633 gen_regular_rel (term_dict + strlen(term_dict), term_value+1, 0);
638 logf (LOG_DEBUG, "dict_lookup_grep: %s", term_dict);
639 r = dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info,
642 logf (LOG_WARN, "dict_lookup_grep fail, rel=gt: %d", r);
643 logf (LOG_DEBUG, "%d positions", grep_info->isam_p_indx);
647 static int trunc_term (ZServerInfo *zi, Z_AttributesPlusTerm *zapt,
648 const char *term_sub,
649 oid_value attributeSet, struct grep_info *grep_info,
650 int num_bases, char **basenames)
652 char term_dict[2*IT_MAX_WORD+2];
655 int truncation_value;
658 oid_value curAttributeSet = attributeSet;
660 attr_init (&use, zapt, 1);
661 use_value = attr_find (&use, &curAttributeSet);
662 logf (LOG_DEBUG, "use value %d", use_value);
663 attr_init (&truncation, zapt, 5);
664 truncation_value = attr_find (&truncation, NULL);
665 logf (LOG_DEBUG, "truncation value %d", truncation_value);
669 i = index_word_prefix_map (term_dict, curAttributeSet, use_value,
670 num_bases, basenames);
677 if (relational_term (zi, zapt, term_sub, term_dict,
678 attributeSet, grep_info))
680 switch (truncation_value)
682 case -1: /* not specified */
683 case 100: /* do not truncate */
684 strcat (term_dict, "(");
685 strcat (term_dict, term_sub);
686 strcat (term_dict, ")");
687 logf (LOG_DEBUG, "dict_lookup_grep: %s", term_dict);
688 r = dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info,
691 logf (LOG_WARN, "dict_lookup_grep fail, trunc=none: %d", r);
693 case 1: /* right truncation */
694 strcat (term_dict, term_sub);
695 strcat (term_dict, ".*");
696 dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info, grep_handle);
698 case 2: /* left truncation */
699 case 3: /* left&right truncation */
702 case 101: /* process # in term */
703 for (j = strlen(term_dict), i = 0; term_sub[i] && i < 2; i++)
704 term_dict[j++] = term_sub[i];
705 for (; term_sub[i]; i++)
706 if (term_sub[i] == '#')
708 term_dict[j++] = '.';
709 term_dict[j++] = '*';
712 term_dict[j++] = term_sub[i];
714 dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info, grep_handle);
716 case 102: /* regular expression */
717 strcat (term_dict, "(");
718 strcat (term_dict, term_sub);
719 strcat (term_dict, ")");
720 logf (LOG_DEBUG, "dict_lookup_grep: %s", term_dict);
721 r = dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info,
724 logf (LOG_WARN, "dict_lookup_grep fail, trunc=regular: %d", r);
727 logf (LOG_DEBUG, "%d positions", grep_info->isam_p_indx);
731 static void trans_term (ZServerInfo *zi, Z_AttributesPlusTerm *zapt,
735 Z_Term *term = zapt->term;
737 sizez = term->u.general->len;
738 if (sizez > IT_MAX_WORD)
740 for (i = 0; i < sizez; i++)
741 termz[i] = index_char_cvt (term->u.general->buf[i]);
745 static RSET rpn_search_APT_relevance (ZServerInfo *zi,
746 Z_AttributesPlusTerm *zapt,
747 oid_value attributeSet,
748 int num_bases, char **basenames)
750 rset_relevance_parms parms;
751 char termz[IT_MAX_WORD+1];
752 char term_sub[IT_MAX_WORD+1];
753 struct grep_info grep_info;
754 char *p0 = termz, *p1 = NULL;
757 parms.key_size = sizeof(struct it_key);
759 parms.cmp = key_compare;
760 parms.is = zi->wordIsam;
762 if (zapt->term->which != Z_Term_general)
767 trans_term (zi, zapt, termz);
768 grep_info.isam_p_indx = 0;
769 grep_info.isam_p_size = 0;
770 grep_info.isam_p_buf = NULL;
773 if ((p1 = strchr (p0, ' ')))
775 memcpy (term_sub, p0, p1-p0);
776 term_sub[p1-p0] = '\0';
779 strcpy (term_sub, p0);
780 if (trunc_term (zi, zapt, term_sub, attributeSet, &grep_info,
781 num_bases, basenames))
789 parms.isam_positions = grep_info.isam_p_buf;
790 parms.no_isam_positions = grep_info.isam_p_indx;
791 if (grep_info.isam_p_indx > 0)
792 result = rset_create (rset_kind_relevance, &parms);
794 result = rset_create (rset_kind_null, NULL);
795 xfree (grep_info.isam_p_buf);
799 static RSET rpn_search_APT_word (ZServerInfo *zi,
800 Z_AttributesPlusTerm *zapt,
801 oid_value attributeSet,
802 int num_bases, char **basenames)
804 rset_isam_parms parms;
805 char termz[IT_MAX_WORD+1];
806 struct grep_info grep_info;
809 if (zapt->term->which != Z_Term_general)
814 trans_term (zi, zapt, termz);
816 grep_info.isam_p_indx = 0;
817 grep_info.isam_p_size = 0;
818 grep_info.isam_p_buf = NULL;
820 if (trunc_term (zi, zapt, termz, attributeSet, &grep_info,
821 num_bases, basenames))
823 if (grep_info.isam_p_indx < 1)
824 result = rset_create (rset_kind_null, NULL);
825 else if (grep_info.isam_p_indx == 1)
827 parms.is = zi->wordIsam;
828 parms.pos = *grep_info.isam_p_buf;
829 result = rset_create (rset_kind_isam, &parms);
832 result = rset_trunc (zi->wordIsam, grep_info.isam_p_buf,
833 grep_info.isam_p_indx);
834 xfree (grep_info.isam_p_buf);
838 static RSET rpn_prox (RSET *rset, int rset_no)
846 rset_temp_parms parms;
848 rsfd = xmalloc (sizeof(*rsfd)*rset_no);
849 more = xmalloc (sizeof(*more)*rset_no);
850 buf = xmalloc (sizeof(*buf)*rset_no);
852 for (i = 0; i<rset_no; i++)
854 buf[i] = xmalloc (sizeof(**buf));
855 rsfd[i] = rset_open (rset[i], RSETF_READ|RSETF_SORT_SYSNO);
856 if (!(more[i] = rset_read (rset[i], rsfd[i], buf[i])))
860 rset_close (rset[i], rsfd[i]);
867 return rset_create (rset_kind_null, NULL);
870 parms.key_size = sizeof (struct it_key);
871 result = rset_create (rset_kind_temp, &parms);
872 rsfd_result = rset_open (result, RSETF_WRITE|RSETF_SORT_SYSNO);
876 for (i = 1; i<rset_no; i++)
885 cmp = key_compare (buf[i], buf[i-1]);
888 more[i-1] = rset_read (rset[i-1], rsfd[i-1], buf[i-1]);
893 if (buf[i-1]->seqno+1 != buf[i]->seqno)
895 more[i-1] = rset_read (rset[i-1], rsfd[i-1], buf[i-1]);
901 more[i] = rset_read (rset[i], rsfd[i], buf[i]);
907 rset_write (result, rsfd_result, buf[0]);
908 more[0] = rset_read (*rset, *rsfd, *buf);
912 for (i = 0; i<rset_no; i++)
914 rset_close (rset[i], rsfd[i]);
917 rset_close (result, rsfd_result);
924 static RSET rpn_search_APT_phrase (ZServerInfo *zi,
925 Z_AttributesPlusTerm *zapt,
926 oid_value attributeSet,
927 int num_bases, char **basenames)
929 char termz[IT_MAX_WORD+1];
930 char term_sub[IT_MAX_WORD+1];
931 char *p0 = termz, *p1 = NULL;
932 RSET rset[60], result;
934 struct grep_info grep_info;
936 if (zapt->term->which != Z_Term_general)
941 trans_term (zi, zapt, termz);
943 grep_info.isam_p_size = 0;
944 grep_info.isam_p_buf = NULL;
948 if ((p1 = strchr (p0, ' ')))
950 memcpy (term_sub, p0, p1-p0);
951 term_sub[p1-p0] = '\0';
954 strcpy (term_sub, p0);
956 grep_info.isam_p_indx = 0;
957 if (trunc_term (zi, zapt, term_sub, attributeSet, &grep_info,
958 num_bases, basenames))
960 if (grep_info.isam_p_indx == 0)
961 rset[rset_no] = rset_create (rset_kind_null, NULL);
962 else if (grep_info.isam_p_indx > 1)
963 rset[rset_no] = rset_trunc (zi->wordIsam,
964 grep_info.isam_p_buf,
965 grep_info.isam_p_indx);
968 rset_isam_parms parms;
970 parms.is = zi->wordIsam;
971 parms.pos = *grep_info.isam_p_buf;
972 rset[rset_no] = rset_create (rset_kind_isam, &parms);
974 assert (rset[rset_no]);
975 if (++rset_no >= sizeof(rset)/sizeof(*rset))
983 xfree (grep_info.isam_p_buf);
985 return rset_create (rset_kind_null, NULL);
986 else if (rset_no == 1)
989 result = rpn_prox (rset, rset_no);
990 for (i = 0; i<rset_no; i++)
991 rset_delete (rset[i]);
995 static RSET rpn_search_APT_local (ZServerInfo *zi, Z_AttributesPlusTerm *zapt,
996 oid_value attributeSet)
1001 rset_temp_parms parms;
1002 char termz[IT_MAX_WORD+1];
1004 if (zapt->term->which != Z_Term_general)
1009 parms.key_size = sizeof (struct it_key);
1010 result = rset_create (rset_kind_temp, &parms);
1011 rsfd = rset_open (result, RSETF_WRITE|RSETF_SORT_SYSNO);
1013 trans_term (zi, zapt, termz);
1014 key.sysno = atoi (termz);
1017 rset_write (result, rsfd, &key);
1018 rset_close (result, rsfd);
1022 static RSET rpn_search_APT (ZServerInfo *zi, Z_AttributesPlusTerm *zapt,
1023 oid_value attributeSet,
1024 int num_bases, char **basenames)
1028 int relation_value, structure_value;
1030 attr_init (&relation, zapt, 2);
1031 attr_init (&structure, zapt, 4);
1033 relation_value = attr_find (&relation, NULL);
1034 structure_value = attr_find (&structure, NULL);
1035 switch (structure_value)
1038 if (relation_value == 102) /* relevance relation */
1039 return rpn_search_APT_relevance (zi, zapt, attributeSet,
1040 num_bases, basenames);
1041 return rpn_search_APT_phrase (zi, zapt, attributeSet,
1042 num_bases, basenames);
1043 case 1: /* phrase */
1044 if (relation_value == 102) /* relevance relation */
1045 return rpn_search_APT_relevance (zi, zapt, attributeSet,
1046 num_bases, basenames);
1047 return rpn_search_APT_phrase (zi, zapt, attributeSet,
1048 num_bases, basenames);
1051 if (relation_value == 102) /* relevance relation */
1052 return rpn_search_APT_relevance (zi, zapt, attributeSet,
1053 num_bases, basenames);
1054 return rpn_search_APT_word (zi, zapt, attributeSet,
1055 num_bases, basenames);
1060 case 5: /* date - normalized */
1062 case 6: /* word list */
1063 return rpn_search_APT_relevance (zi, zapt, attributeSet,
1064 num_bases, basenames);
1065 case 100: /* date - un-normalized */
1067 case 101: /* name - normalized */
1069 case 102: /* date - un-normalized */
1071 case 103: /* structure */
1075 case 105: /* free-form-text */
1076 return rpn_search_APT_relevance (zi, zapt, attributeSet,
1077 num_bases, basenames);
1078 case 106: /* document-text */
1079 return rpn_search_APT_relevance (zi, zapt, attributeSet,
1080 num_bases, basenames);
1081 case 107: /* local-number */
1082 return rpn_search_APT_local (zi, zapt, attributeSet);
1083 case 108: /* string */
1084 return rpn_search_APT_word (zi, zapt, attributeSet,
1085 num_bases, basenames);
1086 case 109: /* numeric string */
1093 static RSET rpn_search_ref (ZServerInfo *zi, Z_ResultSetId *resultSetId)
1097 if (!(s = resultSetGet (zi, resultSetId)))
1098 return rset_create (rset_kind_null, NULL);
1102 static RSET rpn_search_structure (ZServerInfo *zi, Z_RPNStructure *zs,
1103 oid_value attributeSet,
1104 int num_bases, char **basenames)
1107 if (zs->which == Z_RPNStructure_complex)
1109 rset_bool_parms bool_parms;
1111 bool_parms.rset_l = rpn_search_structure (zi, zs->u.complex->s1,
1113 num_bases, basenames);
1114 if (bool_parms.rset_l == NULL)
1116 bool_parms.rset_r = rpn_search_structure (zi, zs->u.complex->s2,
1118 num_bases, basenames);
1119 if (bool_parms.rset_r == NULL)
1121 rset_delete (bool_parms.rset_l);
1124 bool_parms.key_size = sizeof(struct it_key);
1125 bool_parms.cmp = key_compare;
1127 switch (zs->u.complex->operator->which)
1129 case Z_Operator_and:
1130 r = rset_create (rset_kind_and, &bool_parms);
1133 r = rset_create (rset_kind_or, &bool_parms);
1135 case Z_Operator_and_not:
1136 r = rset_create (rset_kind_not, &bool_parms);
1142 else if (zs->which == Z_RPNStructure_simple)
1144 if (zs->u.simple->which == Z_Operand_APT)
1146 logf (LOG_DEBUG, "rpn_search_APT");
1147 r = rpn_search_APT (zi, zs->u.simple->u.attributesPlusTerm,
1148 attributeSet, num_bases, basenames);
1150 else if (zs->u.simple->which == Z_Operand_resultSetId)
1152 logf (LOG_DEBUG, "rpn_search_ref");
1153 r = rpn_search_ref (zi, zs->u.simple->u.resultSetId);
1167 static void count_set (RSET r, int *count)
1173 logf (LOG_DEBUG, "rpn_save_set");
1175 rfd = rset_open (r, RSETF_READ|RSETF_SORT_SYSNO);
1176 while (rset_read (r, rfd, &key))
1178 if (key.sysno != psysno)
1184 rset_close (r, rfd);
1185 logf (LOG_DEBUG, "%d distinct sysnos", *count);
1188 int rpn_search (ZServerInfo *zi,
1189 Z_RPNQuery *rpn, int num_bases, char **basenames,
1190 const char *setname, int *hits)
1194 oid_value attributeSet;
1197 zi->errString = NULL;
1199 attrset = oid_getentbyoid (rpn->attributeSetId);
1200 attributeSet = attrset->value;
1202 rset = rpn_search_structure (zi, rpn->RPNStructure, attributeSet,
1203 num_bases, basenames);
1206 count_set (rset, hits);
1207 resultSetAdd (zi, setname, 1, rset);
1209 logf (LOG_DEBUG, "search error: %d", zi->errCode);
1214 struct scan_entry *list;
1221 static int scan_handle (Dict_char *name, const char *info, int pos,
1224 int len_prefix, idx;
1227 struct scan_info *scan_info = client;
1229 rset_isam_parms parms;
1231 len_prefix = strlen(scan_info->prefix);
1232 if (memcmp (name, scan_info->prefix, len_prefix))
1235 idx = scan_info->after - pos + scan_info->before;
1238 scan_info->list[idx].term = odr_malloc (scan_info->odr,
1239 strlen(name + len_prefix)+1);
1240 strcpy (scan_info->list[idx].term, name + len_prefix);
1241 assert (*info == sizeof(isam_p));
1242 memcpy (&isam_p, info+1, sizeof(isam_p));
1243 parms.is = scan_info->isam;
1246 rset = rset_create (rset_kind_isam, &parms);
1247 count_set (rset, &scan_info->list[idx].occurrences);
1250 scan_info->list[idx].occurrences = 1;
1252 logf (LOG_DEBUG, "pos=%3d idx=%3d name=%s", pos, idx, name);
1256 int rpn_scan (ZServerInfo *zi, ODR odr, Z_AttributesPlusTerm *zapt,
1257 int num_bases, char **basenames,
1258 int *position, int *num_entries, struct scan_entry **list,
1262 int pos = *position;
1263 int num = *num_entries;
1266 char termz[IT_MAX_WORD+20];
1269 Z_Term *term = zapt->term;
1270 struct scan_info scan_info;
1272 logf (LOG_DEBUG, "scan, position = %d, num = %d", pos, num);
1276 scan_info.before = before = pos-1;
1277 scan_info.after = after = 1+num-pos;
1278 scan_info.odr = odr;
1280 logf (LOG_DEBUG, "scan, before = %d, after = %d", before, after);
1282 scan_info.isam = zi->wordIsam;
1283 scan_info.list = odr_malloc (odr, (before+after)*sizeof(*scan_info.list));
1284 for (j = 0; j<before+after; j++)
1285 scan_info.list[j].term = NULL;
1286 attr_init (&use, zapt, 1);
1287 use_value = attr_find (&use, NULL);
1288 logf (LOG_DEBUG, "use value %d", use_value);
1290 if (use_value == -1)
1292 i = index_word_prefix (termz, 1, use_value, num_bases, basenames);
1293 strcpy (scan_info.prefix, termz);
1294 sizez = term->u.general->len;
1295 if (sizez > IT_MAX_WORD)
1296 sizez = IT_MAX_WORD;
1297 for (j = 0; j<sizez; j++)
1298 termz[j+i] = index_char_cvt (term->u.general->buf[j]);
1301 dict_scan (zi->wordDict, termz, &before, &after, &scan_info, scan_handle);
1303 *status = BEND_SCAN_SUCCESS;
1305 for (i = 0; i<scan_info.after; i++)
1306 if (scan_info.list[scan_info.before+scan_info.after-i-1].term)
1310 *status = BEND_SCAN_PARTIAL;
1312 for (i = 0; i<scan_info.before; i++)
1313 if (scan_info.list[i].term)
1316 *status = BEND_SCAN_PARTIAL;
1320 *list = scan_info.list+i; /* list is set to first 'real' entry */
1322 if (*num_entries == 0) /* signal 'unsupported use-attribute' */
1323 zi->errCode = 114; /* if no entries was found */
1324 logf (LOG_DEBUG, "position = %d, num_entries = %d",
1325 *position, *num_entries);
1327 logf (LOG_DEBUG, "scan error: %d", zi->errCode);