* Sebastian Hammer, Adam Dickmeiss
*
* $Log: zrpn.c,v $
- * Revision 1.23 1995-10-06 16:33:37 adam
+ * Revision 1.26 1995-10-12 12:40:54 adam
+ * Bug fixes in rpn_prox.
+ *
+ * Revision 1.25 1995/10/10 13:59:24 adam
+ * Function rset_open changed its wflag parameter to general flags.
+ *
+ * Revision 1.24 1995/10/09 16:18:37 adam
+ * Function dict_lookup_grep got extra client data parameter.
+ *
+ * Revision 1.23 1995/10/06 16:33:37 adam
* Use attribute mappings.
*
* Revision 1.22 1995/10/06 15:07:39 adam
{
attent *attp;
- logf (LOG_DEBUG, "oid_value attrSet = %d", attrSet);
- logf (LOG_DEBUG, "int attrUse = %d", attrUse);
+ logf (LOG_DEBUG, "oid_value attrSet = %d, attrUse = %d", attrSet, attrUse);
attp = att_getentbyatt (attrSet, attrUse);
- assert (attp);
+ if (!attp)
+ return -1;
logf (LOG_DEBUG, "ord=%d", attp->attset_ordinal);
return index_word_prefix (string, attp->attset_ordinal,
attp->local_attribute);
ispt = xmalloc (sizeof(*ispt) * (to-from));
parms.key_size = sizeof (struct it_key);
result = rset_create (rset_kind_temp, &parms);
- rsfd = rset_open (result, 1);
+ rsfd = rset_open (result, RSETF_WRITE|RSETF_SORT_SYSNO);
ti = heap_init (to-from, sizeof(struct it_key),
key_compare);
}
}
-static ISAM_P *isam_p_buf = NULL;
-static int isam_p_size = 0;
-static int isam_p_indx;
+struct grep_info {
+ ISAM_P *isam_p_buf;
+ int isam_p_size;
+ int isam_p_indx;
+};
-static void add_isam_p (const char *info)
+static void add_isam_p (const char *info, struct grep_info *p)
{
- if (isam_p_indx == isam_p_size)
+ if (p->isam_p_indx == p->isam_p_size)
{
ISAM_P *new_isam_p_buf;
- isam_p_size = 2*isam_p_size + 100;
+ p->isam_p_size = 2*p->isam_p_size + 100;
new_isam_p_buf = xmalloc (sizeof(*new_isam_p_buf) *
- isam_p_size);
- if (isam_p_buf)
+ p->isam_p_size);
+ if (p->isam_p_buf)
{
- memcpy (new_isam_p_buf, isam_p_buf,
- isam_p_indx * sizeof(*isam_p_buf));
- xfree (isam_p_buf);
+ memcpy (new_isam_p_buf, p->isam_p_buf,
+ p->isam_p_indx * sizeof(*p->isam_p_buf));
+ xfree (p->isam_p_buf);
}
- isam_p_buf = new_isam_p_buf;
+ p->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++;
+ assert (*info == sizeof(*p->isam_p_buf));
+ memcpy (p->isam_p_buf + p->isam_p_indx, info+1, sizeof(*p->isam_p_buf));
+ (p->isam_p_indx)++;
}
-static int grep_handle (Dict_char *name, const char *info)
+static int grep_handle (Dict_char *name, const char *info, void *p)
{
logf (LOG_DEBUG, "dict name: %s", name);
- add_isam_p (info);
+ add_isam_p (info, p);
return 0;
}
static int trunc_term (ZServerInfo *zi, Z_AttributesPlusTerm *zapt,
- const char *term_sub, ISAM_P **isam_ps,
- oid_value attributeSet)
+ const char *term_sub,
+ oid_value attributeSet, struct grep_info *grep_info)
{
char term_dict[2*IT_MAX_WORD+2];
int i, j;
if (use_value == -1)
use_value = 1016;
i = index_word_prefix_map (term_dict, curAttributeSet, use_value);
+ if (i < 0)
+ {
+ zi->errCode = 114;
+ return -1;
+ }
switch (truncation_value)
{
strcat (term_dict, term_sub);
logf (LOG_DEBUG, "dict_lookup: %s", term_dict);
if ((info = dict_lookup (zi->wordDict, term_dict)))
- add_isam_p (info);
+ add_isam_p (info, grep_info);
break;
case 1: /* right truncation */
strcat (term_dict, term_sub);
strcat (term_dict, ".*");
- dict_lookup_grep (zi->wordDict, term_dict, 0, grep_handle);
+ dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info, grep_handle);
break;
case 2: /* left truncation */
case 3: /* left&right truncation */
else
term_dict[j++] = term_sub[i];
term_dict[j] = '\0';
- dict_lookup_grep (zi->wordDict, term_dict, 0, grep_handle);
+ dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info, grep_handle);
break;
case 102: /* regular expression */
strcat (term_dict, term_sub);
- dict_lookup_grep (zi->wordDict, term_dict, 0, grep_handle);
+ dict_lookup_grep (zi->wordDict, term_dict, 0, grep_info, grep_handle);
break;
}
- *isam_ps = isam_p_buf;
- logf (LOG_DEBUG, "%d positions", isam_p_indx);
+ logf (LOG_DEBUG, "%d positions", grep_info->isam_p_indx);
return 0;
}
rset_relevance_parms parms;
char termz[IT_MAX_WORD+1];
char term_sub[IT_MAX_WORD+1];
+ struct grep_info grep_info;
char *p0 = termz, *p1 = NULL;
+ RSET result;
parms.key_size = sizeof(struct it_key);
parms.max_rec = 100;
return NULL;
}
trans_term (zi, zapt, termz);
- isam_p_indx = 0; /* global, set by trunc_term - see below */
+ grep_info.isam_p_indx = 0;
+ grep_info.isam_p_size = 0;
+ grep_info.isam_p_buf = NULL;
while (1)
{
if ((p1 = strchr (p0, ' ')))
}
else
strcpy (term_sub, p0);
- if (trunc_term (zi, zapt, term_sub, &parms.isam_positions,
- attributeSet))
+ if (trunc_term (zi, zapt, term_sub, attributeSet, &grep_info))
return NULL;
if (!p1)
break;
- p0 = p1+1;
+ p0 = p1;
+ while (*++p0 == ' ')
+ ;
}
- parms.no_isam_positions = isam_p_indx;
- if (isam_p_indx > 0)
- return rset_create (rset_kind_relevance, &parms);
+ parms.isam_positions = grep_info.isam_p_buf;
+ parms.no_isam_positions = grep_info.isam_p_indx;
+ if (grep_info.isam_p_indx > 0)
+ result = rset_create (rset_kind_relevance, &parms);
else
- return rset_create (rset_kind_null, NULL);
+ result = rset_create (rset_kind_null, NULL);
+ xfree (grep_info.isam_p_buf);
+ return result;
}
static RSET rpn_search_APT_word (ZServerInfo *zi,
Z_AttributesPlusTerm *zapt,
oid_value attributeSet)
{
- ISAM_P *isam_positions;
rset_isam_parms parms;
char termz[IT_MAX_WORD+1];
+ struct grep_info grep_info;
+ RSET result;
if (zapt->term->which != Z_Term_general)
{
return NULL;
}
trans_term (zi, zapt, termz);
- isam_p_indx = 0; /* global, set by trunc_term - see below */
- if (trunc_term (zi, zapt, termz, &isam_positions, attributeSet))
+
+ grep_info.isam_p_indx = 0;
+ grep_info.isam_p_size = 0;
+ grep_info.isam_p_buf = NULL;
+
+ if (trunc_term (zi, zapt, termz, attributeSet, &grep_info))
return NULL;
- if (isam_p_indx < 1)
- return rset_create (rset_kind_null, NULL);
- else if (isam_p_indx == 1)
+ if (grep_info.isam_p_indx < 1)
+ result = rset_create (rset_kind_null, NULL);
+ else if (grep_info.isam_p_indx == 1)
{
parms.is = zi->wordIsam;
- parms.pos = *isam_positions;
- return rset_create (rset_kind_isam, &parms);
+ parms.pos = *grep_info.isam_p_buf;
+ result = rset_create (rset_kind_isam, &parms);
}
else
- return rset_trunc (zi->wordIsam, isam_positions, 0, isam_p_indx, 400);
+ result = rset_trunc (zi->wordIsam, grep_info.isam_p_buf, 0,
+ grep_info.isam_p_indx, 400);
+ xfree (grep_info.isam_p_buf);
+ return result;
+}
+
+static RSET rpn_prox (RSET *rset, int rset_no)
+{
+ int i;
+ RSFD *rsfd;
+ int *more;
+ struct it_key **buf;
+ RSFD rsfd_result;
+ RSET result;
+ rset_temp_parms parms;
+
+ rsfd = xmalloc (sizeof(*rsfd)*rset_no);
+ more = xmalloc (sizeof(*more)*rset_no);
+ buf = xmalloc (sizeof(*buf)*rset_no);
+
+ for (i = 0; i<rset_no; i++)
+ {
+ buf[i] = xmalloc (sizeof(**buf));
+ rsfd[i] = rset_open (rset[i], RSETF_READ|RSETF_SORT_SYSNO);
+ if (!(more[i] = rset_read (rset[i], rsfd[i], buf[i])))
+ {
+ while (i >= 0)
+ {
+ rset_close (rset[i], rsfd[i]);
+ xfree (buf[i]);
+ --i;
+ }
+ xfree (rsfd);
+ xfree (more);
+ xfree (buf);
+ return rset_create (rset_kind_null, NULL);
+ }
+ }
+ parms.key_size = sizeof (struct it_key);
+ result = rset_create (rset_kind_temp, &parms);
+ rsfd_result = rset_open (result, RSETF_WRITE|RSETF_SORT_SYSNO);
+
+ while (*more)
+ {
+ for (i = 1; i<rset_no; i++)
+ {
+ int cmp;
+
+ if (!more[i])
+ {
+ *more = 0;
+ break;
+ }
+ cmp = key_compare (buf[i], buf[i-1]);
+ if (cmp > 1)
+ {
+ more[i-1] = rset_read (rset[i-1], rsfd[i-1], buf[i-1]);
+ break;
+ }
+ else if (cmp == 1)
+ {
+ if (buf[i-1]->seqno+1 != buf[i]->seqno)
+ {
+ more[i-1] = rset_read (rset[i-1], rsfd[i-1], buf[i-1]);
+ break;
+ }
+ }
+ else
+ {
+ more[i] = rset_read (rset[i], rsfd[i], buf[i]);
+ break;
+ }
+ }
+ if (i == rset_no)
+ {
+ rset_write (result, rsfd_result, buf[0]);
+ more[0] = rset_read (*rset, *rsfd, *buf);
+ }
+ }
+
+ for (i = 0; i<rset_no; i++)
+ {
+ rset_close (rset[i], rsfd[i]);
+ xfree (buf[i]);
+ }
+ rset_close (result, rsfd_result);
+ xfree (buf);
+ xfree (more);
+ xfree (rsfd);
+ return result;
}
static RSET rpn_search_APT_phrase (ZServerInfo *zi,
Z_AttributesPlusTerm *zapt,
oid_value attributeSet)
{
- ISAM_P *isam_positions;
- rset_isam_parms parms;
char termz[IT_MAX_WORD+1];
+ char term_sub[IT_MAX_WORD+1];
+ char *p0 = termz, *p1 = NULL;
+ RSET rset[60], result;
+ int i, rset_no = 0;
+ struct grep_info grep_info;
if (zapt->term->which != Z_Term_general)
{
return NULL;
}
trans_term (zi, zapt, termz);
- isam_p_indx = 0; /* global, set by trunc_term - see below */
- if (trunc_term (zi, zapt, termz, &isam_positions, attributeSet))
- return NULL;
- if (isam_p_indx != 1)
+
+ grep_info.isam_p_size = 0;
+ grep_info.isam_p_buf = NULL;
+
+ while (1)
+ {
+ if ((p1 = strchr (p0, ' ')))
+ {
+ memcpy (term_sub, p0, p1-p0);
+ term_sub[p1-p0] = '\0';
+ }
+ else
+ strcpy (term_sub, p0);
+
+ grep_info.isam_p_indx = 0;
+ if (trunc_term (zi, zapt, term_sub, attributeSet, &grep_info))
+ return NULL;
+ if (grep_info.isam_p_indx == 0)
+ rset[rset_no] = rset_create (rset_kind_null, NULL);
+ else if (grep_info.isam_p_indx > 1)
+ rset[rset_no] = rset_trunc (zi->wordIsam,
+ grep_info.isam_p_buf, 0,
+ grep_info.isam_p_indx, 400);
+ else
+ {
+ rset_isam_parms parms;
+
+ parms.is = zi->wordIsam;
+ parms.pos = *grep_info.isam_p_buf;
+ rset[rset_no] = rset_create (rset_kind_isam, &parms);
+ }
+ assert (rset[rset_no]);
+ if (++rset_no >= sizeof(rset)/sizeof(*rset))
+ break;
+ if (!p1)
+ break;
+ p0 = p1;
+ while (*++p0 == ' ')
+ ;
+ }
+ xfree (grep_info.isam_p_buf);
+ if (rset_no == 0)
return rset_create (rset_kind_null, NULL);
- parms.is = zi->wordIsam;
- parms.pos = *isam_positions;
- return rset_create (rset_kind_isam, &parms);
+ else if (rset_no == 1)
+ return (rset[0]);
+
+ result = rpn_prox (rset, rset_no);
+ for (i = 0; i<rset_no; i++)
+ rset_delete (rset[i]);
+ return result;
}
static RSET rpn_search_APT_local (ZServerInfo *zi, Z_AttributesPlusTerm *zapt,
}
parms.key_size = sizeof (struct it_key);
result = rset_create (rset_kind_temp, &parms);
- rsfd = rset_open (result, 1);
+ rsfd = rset_open (result, RSETF_WRITE|RSETF_SORT_SYSNO);
trans_term (zi, zapt, termz);
key.sysno = atoi (termz);
case -1:
if (relation_value == 102) /* relevance relation */
return rpn_search_APT_relevance (zi, zapt, attributeSet);
- return rpn_search_APT_word (zi, zapt, attributeSet);
+ return rpn_search_APT_phrase (zi, zapt, attributeSet);
case 1: /* phrase */
if (relation_value == 102) /* relevance relation */
return rpn_search_APT_relevance (zi, zapt, attributeSet);
logf (LOG_DEBUG, "rpn_save_set");
*count = 0;
- rfd = rset_open (r, 0);
+ rfd = rset_open (r, RSETF_READ|RSETF_SORT_SYSNO);
while (rset_read (r, rfd, &key))
{
if (key.sysno != psysno)
return zi->errCode;
}
-static struct scan_entry *scan_list;
-static ODR scan_odr;
-static int scan_before, scan_after;
-static ISAM scan_isam;
-static char scan_prefix[20];
+struct scan_info {
+ struct scan_entry *list;
+ ODR odr;
+ int before, after;
+ ISAM isam;
+ char prefix[20];
+};
-static int scan_handle (Dict_char *name, const char *info, int pos)
+static int scan_handle (Dict_char *name, const char *info, int pos,
+ void *client)
{
int len_prefix, idx;
ISAM_P isam_p;
RSET rset;
+ struct scan_info *scan_info = client;
rset_isam_parms parms;
- len_prefix = strlen(scan_prefix);
- if (memcmp (name, scan_prefix, len_prefix))
+ len_prefix = strlen(scan_info->prefix);
+ if (memcmp (name, scan_info->prefix, len_prefix))
return 1;
if (pos > 0)
- idx = scan_after - pos + scan_before;
+ idx = scan_info->after - pos + scan_info->before;
else
idx = - pos - 1;
- scan_list[idx].term = odr_malloc (scan_odr, strlen(name + len_prefix)+1);
- strcpy (scan_list[idx].term, name + len_prefix);
+ scan_info->list[idx].term = odr_malloc (scan_info->odr,
+ strlen(name + len_prefix)+1);
+ strcpy (scan_info->list[idx].term, name + len_prefix);
assert (*info == sizeof(isam_p));
memcpy (&isam_p, info+1, sizeof(isam_p));
- parms.is = scan_isam;
+ parms.is = scan_info->isam;
parms.pos = isam_p;
#if 1
rset = rset_create (rset_kind_isam, &parms);
- count_set (rset, &scan_list[idx].occurrences);
+ count_set (rset, &scan_info->list[idx].occurrences);
rset_delete (rset);
#else
- scan_list[idx].occurrences = 1;
+ scan_info->list[idx].occurrences = 1;
#endif
logf (LOG_DEBUG, "pos=%3d idx=%3d name=%s", pos, idx, name);
return 0;
}
int rpn_scan (ZServerInfo *zi, ODR odr, Z_AttributesPlusTerm *zapt,
- int *position, int *num_entries, struct scan_entry **list)
+ int *position, int *num_entries, struct scan_entry **list,
+ int *status)
{
int i, j, sizez;
int pos = *position;
AttrType use;
int use_value;
Z_Term *term = zapt->term;
+ struct scan_info scan_info;
logf (LOG_DEBUG, "scan, position = %d, num = %d", pos, num);
- scan_before = before = pos-1;
- scan_after = after = 1+num-pos;
- scan_odr = odr;
+ scan_info.before = before = pos-1;
+ scan_info.after = after = 1+num-pos;
+ scan_info.odr = odr;
logf (LOG_DEBUG, "scan, before = %d, after = %d", before, after);
- scan_isam = zi->wordIsam;
- scan_list = *list = odr_malloc (odr, (before+after)*sizeof(**list));
+ scan_info.isam = zi->wordIsam;
+ scan_info.list = odr_malloc (odr, (before+after)*sizeof(*scan_info.list));
for (j = 0; j<before+after; j++)
- scan_list[j].term = "------";
+ scan_info.list[j].term = NULL;
attr_init (&use, zapt, 1);
use_value = attr_find (&use, NULL);
logf (LOG_DEBUG, "use value %d", use_value);
if (use_value == -1)
use_value = 1016;
i = index_word_prefix (termz, 1, use_value);
- strcpy (scan_prefix, termz);
+ strcpy (scan_info.prefix, termz);
sizez = term->u.general->len;
if (sizez > IT_MAX_WORD)
sizez = IT_MAX_WORD;
termz[j+i] = index_char_cvt (term->u.general->buf[j]);
termz[j+i] = '\0';
- dict_scan (zi->wordDict, termz, &before, &after, scan_handle);
+ dict_scan (zi->wordDict, termz, &before, &after, &scan_info, scan_handle);
+
+ *status = BEND_SCAN_SUCCESS;
+
+ for (i = 0; i<scan_info.after; i++)
+ if (scan_info.list[scan_info.before+scan_info.after-i-1].term)
+ break;
+ *num_entries -= i;
+ if (i)
+ *status = BEND_SCAN_PARTIAL;
+
+ for (i = 0; i<scan_info.before; i++)
+ if (scan_info.list[i].term)
+ break;
+ if (i)
+ *status = BEND_SCAN_PARTIAL;
+ *position -= i;
+ *num_entries -= i;
+ *list = scan_info.list+i; /* list is set to first 'real' entry */
+
+ if (*num_entries == 0) /* signal 'unsupported use-attribute' */
+ zi->errCode = 114; /* if no entries was found */
+ logf (LOG_DEBUG, "position = %d, num_entries = %d",
+ *position, *num_entries);
if (zi->errCode)
logf (LOG_DEBUG, "scan error: %d", zi->errCode);
return 0;
}
+
+
projects / idzebra-moved-to-github.git / blobdiff