/*
- * Copyright (C) 1995, Index Data I/S
+ * Copyright (C) 1994-1995, Index Data I/S
* All rights reserved.
* Sebastian Hammer, Adam Dickmeiss
*
* $Log: zrpn.c,v $
- * Revision 1.1 1995-09-04 09:10:40 adam
+ * Revision 1.11 1995-09-14 11:53:27 adam
+ * First work on regular expressions/truncations.
+ *
+ * Revision 1.10 1995/09/11 15:23:26 adam
+ * More work on relevance search.
+ *
+ * Revision 1.9 1995/09/11 13:09:35 adam
+ * More work on relevance feedback.
+ *
+ * Revision 1.8 1995/09/08 14:52:27 adam
+ * Minor changes. Dictionary is lower case now.
+ *
+ * Revision 1.7 1995/09/07 13:58:36 adam
+ * New parameter: result-set file descriptor (RSFD) to support multiple
+ * positions within the same result-set.
+ * Boolean operators: and, or, not implemented.
+ * Result-set references.
+ *
+ * Revision 1.6 1995/09/06 16:11:18 adam
+ * Option: only one word key per file.
+ *
+ * Revision 1.5 1995/09/06 10:33:04 adam
+ * More work on present. Some log messages removed.
+ *
+ * Revision 1.4 1995/09/05 15:28:40 adam
+ * More work on search engine.
+ *
+ * Revision 1.3 1995/09/04 15:20:22 adam
+ * Minor changes.
+ *
+ * Revision 1.2 1995/09/04 12:33:43 adam
+ * Various cleanup. YAZ util used instead.
+ *
+ * Revision 1.1 1995/09/04 09:10:40 adam
* More work on index add/del/update.
* Merge sort implemented.
* Initial work on z39 server.
#include <assert.h>
#include <unistd.h>
-#include <util.h>
-#include <dict.h>
-#include <isam.h>
+#include "zserver.h"
+
#include <rsisam.h>
#include <rstemp.h>
+#include <rsnull.h>
+#include <rsbool.h>
+#include <rsrel.h>
-#include <proto.h>
+/*
+ * attr_print: log attributes
+ */
+static void attr_print (Z_AttributesPlusTerm *t)
+{
+ int of, i;
+ for (of = 0; of < t->num_attributes; of++)
+ {
+ Z_AttributeElement *element;
+ element = t->attributeList[of];
-#include "index.h"
+ switch (element->which)
+ {
+ case Z_AttributeValue_numeric:
+ logf (LOG_DEBUG, "attributeType=%d value=%d",
+ *element->attributeType,
+ *element->value.numeric);
+ break;
+ case Z_AttributeValue_complex:
+ logf (LOG_DEBUG, "attributeType=%d complex",
+ *element->attributeType);
+ for (i = 0; i<element->value.complex->num_list; i++)
+ {
+ if (element->value.complex->list[i]->which ==
+ Z_StringOrNumeric_string)
+ logf (LOG_DEBUG, " string: '%s'",
+ element->value.complex->list[i]->u.string);
+ else if (element->value.complex->list[i]->which ==
+ Z_StringOrNumeric_numeric)
+ logf (LOG_DEBUG, " numeric: '%d'",
+ *element->value.complex->list[i]->u.numeric);
+ }
+ break;
+ default:
+ assert (0);
+ }
+ }
+}
-static Dict dict;
-static ISAM isam;
+typedef struct {
+ int type;
+ int major;
+ int minor;
+ Z_AttributesPlusTerm *zapt;
+} AttrType;
-static RSET rpn_search_APT (Z_AttributesPlusTerm *zapt)
+static int attr_find (AttrType *src)
{
- struct rset_isam_parms parms;
- const char *info;
- Z_Term *term = zapt->term;
+ while (src->major < src->zapt->num_attributes)
+ {
+ Z_AttributeElement *element;
+ element = src->zapt->attributeList[src->major];
- if (term->which != Z_Term_general)
- return NULL;
- if (!(info = dict_lookup (dict, term->u.general->buf)))
- return NULL;
- assert (*info == sizeof(parms.pos));
- memcpy (&parms.pos, info+1, sizeof(parms.pos));
- parms.is = isam;
- return rset_create (rset_kind_isam, &parms);
+ if (src->type == *element->attributeType)
+ {
+ switch (element->which)
+ {
+ case Z_AttributeValue_numeric:
+ ++(src->major);
+ return *element->value.numeric;
+ break;
+ case Z_AttributeValue_complex:
+ if (src->minor >= element->value.complex->num_list ||
+ element->value.complex->list[src->minor]->which !=
+ Z_StringOrNumeric_numeric)
+ break;
+ ++(src->minor);
+ return *element->value.complex->list[src->minor-1]->u.numeric;
+ default:
+ assert (0);
+ }
+ }
+ ++(src->major);
+ }
+ return -1;
}
-static RSET rpn_search_and (RSET r_l, RSET r_r)
+static void attr_init (AttrType *src, Z_AttributesPlusTerm *zapt,
+ int type)
{
- struct it_key k1, k2;
- RSET r_dst;
- int i1, i2;
- rset_open (r_l, 0);
- rset_open (r_r, 0);
- r_dst = rset_create (rset_kind_temp, NULL);
- rset_open (r_dst, 1);
-
- i1 = rset_read (r_l, &k1);
- i2 = rset_read (r_r, &k2);
- while (i1 && i2)
+ src->zapt = zapt;
+ src->type = type;
+ src->major = 0;
+ src->minor = 0;
+}
+
+static ISAM_P *isam_p_buf = NULL;
+static int isam_p_size = 0;
+static int isam_p_indx;
+
+static void add_isam_p (const char *info)
+{
+ if (isam_p_indx == isam_p_size)
{
- if (k1.sysno > k2.sysno)
- i2 = rset_read (r_r, &k2);
- else if (k1.sysno < k2.sysno)
- i1 = rset_read (r_l, &k1);
- else if (!(i1 = key_compare_x (&k1, &k2)))
+ ISAM_P *new_isam_p_buf;
+
+ isam_p_size = 2*isam_p_size + 100;
+ new_isam_p_buf = xmalloc (sizeof(*new_isam_p_buf) *
+ isam_p_size);
+ if (isam_p_buf)
{
- rset_write (r_dst, &k1);
- i1 = rset_read (r_l, &k1);
- i2 = rset_read (r_r, &k2);
+ memcpy (new_isam_p_buf, isam_p_buf,
+ isam_p_indx * sizeof(*isam_p_buf));
+ xfree (isam_p_buf);
}
- else if (i1 > 0)
+ isam_p_buf = new_isam_p_buf;
+ }
+ assert (*info == sizeof(*isam_p_buf));
+ memcpy (isam_p_buf + isam_p_indx, info+1, sizeof(*isam_p_buf));
+ isam_p_indx++;
+}
+
+static int grep_handle (Dict_char *name, const char *info)
+{
+ logf (LOG_DEBUG, "dict name: %s", name);
+ add_isam_p (info);
+ return 0;
+}
+
+static int trunc_term (ZServerInfo *zi, Z_AttributesPlusTerm *zapt,
+ ISAM_P **isam_ps,
+ int *no, int split_flag)
+{
+ char termz[IT_MAX_WORD+1];
+ char term_sub[IT_MAX_WORD+1];
+ char term_dict[2*IT_MAX_WORD+2];
+ int sizez, i, j;
+ char *p0 = termz, *p1 = NULL;
+ const char *info;
+ AttrType truncation;
+ int truncation_value;
+ Z_Term *term = zapt->term;
+
+ isam_p_indx = 0;
+ attr_init (&truncation, zapt, 5);
+ truncation_value = attr_find (&truncation);
+ logf (LOG_DEBUG, "truncation value %d", truncation_value);
+ *no = 0;
+ if (term->which != Z_Term_general)
+ {
+ zi->errCode = 124;
+ return -1;
+ }
+ sizez = term->u.general->len;
+ if (sizez > IT_MAX_WORD)
+ sizez = IT_MAX_WORD;
+ for (i = 0; i<sizez; i++)
+ termz[i] = index_char_cvt (term->u.general->buf[i]);
+ termz[i] = '\0';
+
+ while (1)
+ {
+ if (split_flag && (p1 = strchr (p0, ' ')))
{
- rset_write (r_dst, &k2);
- i2 = rset_read (r_r, &k2);
+ memcpy (term_sub, p0, p1-p0);
+ term_sub[p1-p0] = '\0';
}
else
+ strcpy (term_sub, p0);
+ switch (truncation_value)
{
- rset_write (r_dst, &k1);
- i1 = rset_read (r_l, &k1);
+ case -1: /* not specified */
+ case 100: /* do not truncate */
+ strcpy (term_dict, term_sub);
+ logf (LOG_DEBUG, "dict_lookup: %s", term_dict);
+ if ((info = dict_lookup (zi->wordDict, term_dict)))
+ add_isam_p (info);
+ break;
+ case 1: /* right truncation */
+ strcpy (term_dict, term_sub);
+ strcat (term_dict, ".*");
+ dict_lookup_grep (zi->wordDict, term_dict, 0, grep_handle);
+ break;
+ case 2: /* left truncation */
+ case 3: /* left&right truncation */
+ zi->errCode = 120;
+ return -1;
+ case 101: /* process # in term */
+ for (j = 0, i = 0; term_sub[i] && i < 3; i++)
+ term_dict[j++] = term_sub[i];
+ for (; term_sub[i]; i++)
+ if (term_sub[i] == '#')
+ {
+ term_dict[j++] = '.';
+ term_dict[j++] = '*';
+ }
+ else
+ term_dict[j++] = term_sub[i];
+ term_dict[j] = '\0';
+ dict_lookup_grep (zi->wordDict, term_dict, 0, grep_handle);
+ break;
+ case 102: /* regular expression */
+ strcpy (term_dict, term_sub);
+ dict_lookup_grep (zi->wordDict, term_dict, 0, grep_handle);
+ break;
}
- }
- rset_close (r_dst);
- return r_dst;
+ if (!p1)
+ break;
+ p0 = p1+1;
+ }
+ *isam_ps = isam_p_buf;
+ *no = isam_p_indx;
+ logf (LOG_DEBUG, "%d positions", *no);
+ return 0;
+}
+
+static RSET rpn_search_APT_relevance (ZServerInfo *zi,
+ Z_AttributesPlusTerm *zapt)
+{
+ rset_relevance_parms parms;
+
+ parms.key_size = sizeof(struct it_key);
+ parms.max_rec = 100;
+ parms.cmp = key_compare;
+ parms.is = zi->wordIsam;
+ if (trunc_term (zi, zapt, &parms.isam_positions,
+ &parms.no_isam_positions, 1))
+ return NULL;
+ if (parms.no_isam_positions > 0)
+ return rset_create (rset_kind_relevance, &parms);
+ else
+ return rset_create (rset_kind_null, NULL);
}
-static RSET rpn_search_or (RSET r_l, RSET r_r)
+static RSET rpn_search_APT_word (ZServerInfo *zi,
+ Z_AttributesPlusTerm *zapt)
{
- return r_l;
+ ISAM_P *isam_positions;
+ int no_isam_positions;
+ rset_isam_parms parms;
+
+ if (trunc_term (zi, zapt, &isam_positions,
+ &no_isam_positions, 0))
+ return NULL;
+ if (no_isam_positions != 1)
+ return rset_create (rset_kind_null, NULL);
+ parms.is = zi->wordIsam;
+ parms.pos = *isam_positions;
+ return rset_create (rset_kind_isam, &parms);
}
-static RSET rpn_search_not (RSET r_l, RSET r_r)
+static RSET rpn_search_APT_phrase (ZServerInfo *zi,
+ Z_AttributesPlusTerm *zapt)
{
- return r_l;
+ ISAM_P *isam_positions;
+ int no_isam_positions;
+ rset_isam_parms parms;
+
+ if (trunc_term (zi, zapt, &isam_positions,
+ &no_isam_positions, 1))
+ return NULL;
+ if (no_isam_positions != 1)
+ return rset_create (rset_kind_null, NULL);
+ parms.is = zi->wordIsam;
+ parms.pos = *isam_positions;
+ return rset_create (rset_kind_isam, &parms);
}
-static RSET rpn_search_ref (Z_ResultSetId *resultSetId)
+static RSET rpn_search_APT (ZServerInfo *zi, Z_AttributesPlusTerm *zapt)
{
+ AttrType relation;
+ AttrType structure;
+ int relation_value, structure_value;
+
+ attr_init (&relation, zapt, 2);
+ attr_init (&structure, zapt, 4);
+
+ relation_value = attr_find (&relation);
+ structure_value = attr_find (&structure);
+ switch (structure_value)
+ {
+ case -1:
+ if (relation_value == 102) /* relevance relation */
+ return rpn_search_APT_relevance (zi, zapt);
+ return rpn_search_APT_word (zi, zapt);
+ case 1: /* phrase */
+ if (relation_value == 102) /* relevance relation */
+ return rpn_search_APT_relevance (zi, zapt);
+ return rpn_search_APT_phrase (zi, zapt);
+ break;
+ case 2: /* word */
+ if (relation_value == 102) /* relevance relation */
+ return rpn_search_APT_relevance (zi, zapt);
+ return rpn_search_APT_word (zi, zapt);
+ case 3: /* key */
+ break;
+ case 4: /* year */
+ break;
+ case 5: /* date - normalized */
+ break;
+ case 6: /* word list */
+ return rpn_search_APT_relevance (zi, zapt);
+ case 100: /* date - un-normalized */
+ break;
+ case 101: /* name - normalized */
+ break;
+ case 102: /* date - un-normalized */
+ break;
+ case 103: /* structure */
+ break;
+ case 104: /* urx */
+ break;
+ case 105: /* free-form-text */
+ return rpn_search_APT_relevance (zi, zapt);
+ case 106: /* document-text */
+ return rpn_search_APT_relevance (zi, zapt);
+ case 107: /* local-number */
+ break;
+ case 108: /* string */
+ return rpn_search_APT_word (zi, zapt);
+ case 109: /* numeric string */
+ break;
+ }
+ zi->errCode = 118;
return NULL;
}
-static RSET rpn_search_structure (Z_RPNStructure *zs)
+static RSET rpn_search_ref (ZServerInfo *zi, Z_ResultSetId *resultSetId)
{
- RSET r;
+ ZServerSet *s;
+
+ if (!(s = resultSetGet (zi, resultSetId)))
+ return rset_create (rset_kind_null, NULL);
+ return s->rset;
+}
+
+static RSET rpn_search_structure (ZServerInfo *zi, Z_RPNStructure *zs)
+{
+ RSET r = NULL;
if (zs->which == Z_RPNStructure_complex)
{
- RSET r_l, r_r;
+ rset_bool_parms bool_parms;
- r_l = rpn_search_structure (zs->u.complex->s1);
- r_r = rpn_search_structure (zs->u.complex->s2);
+ bool_parms.rset_l = rpn_search_structure (zi, zs->u.complex->s1);
+ if (bool_parms.rset_l == NULL)
+ return NULL;
+ bool_parms.rset_r = rpn_search_structure (zi, zs->u.complex->s2);
+ if (bool_parms.rset_r == NULL)
+ {
+ rset_delete (bool_parms.rset_l);
+ return NULL;
+ }
+ bool_parms.key_size = sizeof(struct it_key);
+ bool_parms.cmp = key_compare;
switch (zs->u.complex->operator->which)
{
case Z_Operator_and:
- r = rpn_search_and (r_l, r_r);
+ r = rset_create (rset_kind_and, &bool_parms);
break;
case Z_Operator_or:
- r = rpn_search_or (r_l, r_r);
+ r = rset_create (rset_kind_or, &bool_parms);
break;
case Z_Operator_and_not:
- r = rpn_search_not (r_l, r_r);
+ r = rset_create (rset_kind_not, &bool_parms);
break;
default:
assert (0);
}
- rset_delete (r_l);
- rset_delete (r_r);
}
else if (zs->which == Z_RPNStructure_simple)
{
if (zs->u.simple->which == Z_Operand_APT)
- r = rpn_search_APT (zs->u.simple->u.attributesPlusTerm);
+ {
+ logf (LOG_DEBUG, "rpn_search_APT");
+ r = rpn_search_APT (zi, zs->u.simple->u.attributesPlusTerm);
+ }
else if (zs->u.simple->which == Z_Operand_resultSetId)
- r = rpn_search_ref (zs->u.simple->u.resultSetId);
+ {
+ logf (LOG_DEBUG, "rpn_search_ref");
+ r = rpn_search_ref (zi, zs->u.simple->u.resultSetId);
+ }
else
{
assert (0);
}
return r;
}
+
+static void count_set (RSET r, int *count)
+{
+ int psysno = 0;
+ struct it_key key;
+ RSFD rfd;
+
+ logf (LOG_DEBUG, "rpn_save_set");
+ *count = 0;
+ rfd = rset_open (r, 0);
+ while (rset_read (r, rfd, &key))
+ {
+ if (key.sysno != psysno)
+ {
+ psysno = key.sysno;
+ (*count)++;
+ }
+ }
+ rset_close (r, rfd);
+ logf (LOG_DEBUG, "%d distinct sysnos", *count);
+}
+
+int rpn_search (ZServerInfo *zi,
+ Z_RPNQuery *rpn, int num_bases, char **basenames,
+ const char *setname, int *hits)
+{
+ RSET rset;
+
+ zi->errCode = 0;
+ zi->errString = NULL;
+ rset = rpn_search_structure (zi, rpn->RPNStructure);
+ if (!rset)
+ return zi->errCode;
+ count_set (rset, hits);
+ resultSetAdd (zi, setname, 1, rset);
+ return zi->errCode;
+}
+
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