-/* $Id: rpnscan.c,v 1.1 2006-09-21 08:56:52 adam Exp $
+/* $Id: rpnscan.c,v 1.3 2006-09-21 20:22:34 adam Exp $
Copyright (C) 1995-2006
Index Data ApS
#include <yaz/diagbib1.h>
#include "index.h"
#include <zebra_xpath.h>
+#include <yaz/wrbuf.h>
#include <attrfind.h>
#include <charmap.h>
#include <rset.h>
-struct scan_info_entry {
- char *term;
- ISAM_P isam_p;
-};
+#define RPN_MAX_ORDS 32
-struct scan_info {
- struct scan_info_entry *list;
- ODR odr;
- int before, after;
- char prefix[20];
-};
+int log_scan = YLOG_LOG;
/* convert APT SCAN term to internal cmap */
static ZEBRA_RES trans_scan_term(ZebraHandle zh, Z_AttributesPlusTerm *zapt,
*count = rset->hits_count;
}
-static int scan_handle (char *name, const char *info, int pos, void *client)
+struct scan2_info_entry {
+ WRBUF term;
+ char prefix[20];
+ ISAM_P isam_p;
+ int pos_to_save;
+};
+
+static int scan_handle2(char *name, const char *info, int pos, void *client)
{
- int len_prefix, idx;
- struct scan_info *scan_info = (struct scan_info *) client;
+ int len_prefix;
+ struct scan2_info_entry *scan_info = (struct scan2_info_entry *) client;
+
+ if (scan_info->pos_to_save != pos)
+ return 0;
len_prefix = strlen(scan_info->prefix);
if (memcmp (name, scan_info->prefix, len_prefix))
return 1;
- if (pos > 0)
- idx = scan_info->after - pos + scan_info->before;
- else
- idx = - pos - 1;
- /* skip special terms.. of no interest */
- if (name[len_prefix] < 4)
+ /* skip special terms such as first-in-field specials */
+ if (name[len_prefix] < CHR_BASE_CHAR)
return 1;
- if (idx < 0)
- return 0;
- scan_info->list[idx].term = (char *)
- odr_malloc(scan_info->odr, strlen(name + len_prefix)+1);
- strcpy(scan_info->list[idx].term, name + len_prefix);
+ wrbuf_rewind(scan_info->term);
+ wrbuf_puts(scan_info->term, name+len_prefix);
+
assert (*info == sizeof(ISAM_P));
- memcpy (&scan_info->list[idx].isam_p, info+1, sizeof(ISAM_P));
+ memcpy (&scan_info->isam_p, info+1, sizeof(ISAM_P));
return 0;
}
-#define RPN_MAX_ORDS 32
-
-ZEBRA_RES rpn_scan(ZebraHandle zh, ODR stream, Z_AttributesPlusTerm *zapt,
- oid_value attributeset,
- int num_bases, char **basenames,
- int *position, int *num_entries, ZebraScanEntry **list,
- int *is_partial, RSET limit_set, int return_zero)
+static int scan_save_set(ZebraHandle zh, ODR stream, NMEM nmem,
+ struct rset_key_control *kc,
+ Z_AttributesPlusTerm *zapt,
+ RSET limit_set,
+ const char *term,
+ int index_type,
+ struct scan2_info_entry *ar, int ord_no,
+ ZebraScanEntry *glist, int pos)
{
int i;
- int pos = *position;
- int num = *num_entries;
- int before;
- int after;
- int base_no;
- char termz[IT_MAX_WORD+20];
- struct scan_info *scan_info_array;
- ZebraScanEntry *glist;
- int ords[RPN_MAX_ORDS], ord_no = 0;
- int ptr[RPN_MAX_ORDS];
-
- unsigned index_type;
- char *search_type = NULL;
- char rank_type[128];
- int complete_flag;
- int sort_flag;
- NMEM rset_nmem = NULL;
- struct rset_key_control *kc = 0;
-
- *list = 0;
- *is_partial = 0;
-
- if (attributeset == VAL_NONE)
- attributeset = VAL_BIB1;
-
- if (!limit_set)
+ RSET rset = 0;
+ for (i = 0; i < ord_no; i++)
{
- AttrType termset;
- int termset_value_numeric;
- const char *termset_value_string;
- attr_init_APT(&termset, zapt, 8);
- termset_value_numeric =
- attr_find_ex(&termset, NULL, &termset_value_string);
- if (termset_value_numeric != -1)
+ if (ar[i].isam_p && strcmp(wrbuf_buf(ar[i].term), term) == 0)
{
- char resname[32];
- const char *termset_name = 0;
-
- if (termset_value_numeric != -2)
+ RSET rset_t = rset_trunc(
+ zh, &ar[i].isam_p, 1,
+ wrbuf_buf(ar[i].term), wrbuf_len(ar[i].term),
+ NULL, 0, zapt->term->which, nmem,
+ kc, kc->scope, 0, index_type,
+ 0 /* hits_limit */,
+ 0 /* term_ref_id_str */);
+ if (!rset)
+ rset = rset_t;
+ else
{
+ RSET rsets[2];
- sprintf(resname, "%d", termset_value_numeric);
- termset_name = resname;
+ rsets[0] = rset;
+ rsets[1] = rset_t;
+ rset = rset_create_or(nmem, kc, kc->scope, 0 /* termid */,
+ 2, rsets);
}
- else
- termset_name = termset_value_string;
+ ar[i].isam_p = 0;
+ }
+ }
+ if (rset)
+ {
+ zint count;
+ /* merge with limit_set if given */
+ if (limit_set)
+ {
+ RSET rsets[2];
+ rsets[0] = rset;
+ rsets[1] = rset_dup(limit_set);
- limit_set = resultSetRef (zh, termset_name);
+ rset = rset_create_and(nmem, kc, kc->scope, 2, rsets);
+ }
+ /* count it */
+ count_set(zh, rset, &count);
+ rset_delete(rset);
+ if (count > 0)
+ {
+ if (pos != -1)
+ {
+ zebra_term_untrans_iconv(zh, stream->mem, index_type,
+ &glist[pos].term, term);
+ glist[pos].occurrences = count;
+ }
+ return 1;
}
}
+ return 0;
+}
- yaz_log(YLOG_DEBUG, "position = %d, num = %d set=%d",
- pos, num, attributeset);
-
- if (zebra_maps_attr(zh->reg->zebra_maps, zapt, &index_type, &search_type,
- rank_type, &complete_flag, &sort_flag))
+static ZEBRA_RES rpn_scan_ver2(ZebraHandle zh, ODR stream, NMEM nmem,
+ struct rset_key_control *kc,
+ Z_AttributesPlusTerm *zapt,
+ int *position, int *num_entries,
+ ZebraScanEntry **list,
+ int *is_partial, RSET limit_set,
+ int index_type, int ord_no, int *ords)
+{
+ struct scan2_info_entry *ar = nmem_malloc(nmem, sizeof(*ar) * ord_no);
+ struct rpn_char_map_info rcmi;
+ int i, dif;
+ int pos = 0;
+
+ ZebraScanEntry *glist = (ZebraScanEntry *)
+ odr_malloc(stream, *num_entries * sizeof(*glist));
+
+ *is_partial = 0;
+ if (*position > *num_entries+1)
{
+ *is_partial = 1;
+ *position = 1;
*num_entries = 0;
- zebra_setError(zh, YAZ_BIB1_UNSUPP_ATTRIBUTE_TYPE, 0);
- return ZEBRA_FAIL;
+ return ZEBRA_OK;
}
- for (base_no = 0; base_no < num_bases && ord_no < RPN_MAX_ORDS; base_no++)
+ rpn_char_map_prepare (zh->reg, index_type, &rcmi);
+
+ for (i = 0; i < ord_no; i++)
+ ar[i].term = wrbuf_alloc();
+
+ for (i = 0; i < ord_no; i++)
{
- int ord;
+ char termz[IT_MAX_WORD+20];
+ int prefix_len = 0;
+
+ prefix_len = key_SU_encode (ords[i], termz);
+ termz[prefix_len] = 0;
+ strcpy(ar[i].prefix, termz);
+
+ if (trans_scan_term(zh, zapt, termz+prefix_len, index_type) ==
+ ZEBRA_FAIL)
+ return ZEBRA_FAIL;
+ wrbuf_rewind(ar[i].term);
+ wrbuf_puts(ar[i].term, termz + prefix_len);
+ ar[i].isam_p = 0;
+ }
+ /** deal with terms before position .. */
+ /* the glist index starts at zero (unlike scan positions */
+ for (pos = *position-2; pos >= 0; )
+ {
+ const char *hi = 0;
- if (zebraExplain_curDatabase (zh->reg->zei, basenames[base_no]))
- {
- zebra_setError(zh, YAZ_BIB1_DATABASE_UNAVAILABLE,
- basenames[base_no]);
- *num_entries = 0;
- return ZEBRA_FAIL;
- }
- if (zebra_apt_get_ord(zh, zapt, index_type, 0, attributeset, &ord)
- != ZEBRA_OK)
- continue;
- ords[ord_no++] = ord;
+ /* scan on all maximum terms */
+ for (i = 0; i < ord_no; i++)
+ {
+ if (ar[i].isam_p == 0)
+ {
+ char termz[IT_MAX_WORD+20];
+ int before = 1;
+ int after = 0;
+
+ ar[i].pos_to_save = -1;
+
+ strcpy(termz, ar[i].prefix);
+ strcat(termz, wrbuf_buf(ar[i].term));
+ dict_scan(zh->reg->dict, termz, &before, &after,
+ ar+i, scan_handle2);
+ }
+ }
+ /* get maximum after scan */
+ for (i = 0; i < ord_no; i++)
+ {
+ if (ar[i].isam_p
+ && (hi == 0 || strcmp(wrbuf_buf(ar[i].term), hi) > 0))
+ hi = wrbuf_buf(ar[i].term);
+ }
+ if (!hi)
+ break;
+ if (scan_save_set(zh, stream, nmem, kc, zapt, limit_set, hi,
+ index_type, ar, ord_no, glist,
+ (pos >= 0 && pos < *num_entries) ? pos : -1))
+ --pos;
}
- if (ord_no == 0)
+ /* see if we got all terms before.. */
+ dif = 1 + pos;
+ if (dif > 0)
{
- *num_entries = 0;
- return ZEBRA_FAIL;
+ /* did not get all terms; adjust the real position and reduce
+ number of entries */
+ yaz_log(YLOG_LOG, "before terms dif=%d", dif);
+ glist = glist + dif;
+ *num_entries -= dif;
+ *position -= dif;
+ *is_partial = 1;
}
- /* prepare dictionary scanning */
- if (num < 1)
+ for (i = 0; i < ord_no; i++)
{
- *num_entries = 0;
- return ZEBRA_OK;
+ char termz[IT_MAX_WORD+20];
+ int prefix_len = 0;
+
+ prefix_len = key_SU_encode (ords[i], termz);
+ termz[prefix_len] = 0;
+ strcpy(ar[i].prefix, termz);
+
+ if (trans_scan_term(zh, zapt, termz+prefix_len, index_type) ==
+ ZEBRA_FAIL)
+ return ZEBRA_FAIL;
+ wrbuf_rewind(ar[i].term);
+ wrbuf_puts(ar[i].term, termz + prefix_len);
+ ar[i].isam_p = 0;
}
+
+ for (pos = *position-1; pos < *num_entries; )
+ {
+ const char *lo = 0;
+
+ /* scan on all minimum terms */
+ for (i = 0; i < ord_no; i++)
+ {
+ if (ar[i].isam_p == 0)
+ {
+ char termz[IT_MAX_WORD+20];
+ int before = 0;
+ int after = (pos == *position-1) ? 1 : 2;
+
+ ar[i].pos_to_save = 1;
+
+ strcpy(termz, ar[i].prefix);
+ strcat(termz, wrbuf_buf(ar[i].term));
+ dict_scan(zh->reg->dict, termz, &before, &after,
+ ar+i, scan_handle2);
+ }
+ }
+ /* get minimum after scan */
+ for (i = 0; i < ord_no; i++)
+ {
+ if (ar[i].isam_p
+ && (lo == 0 || strcmp(wrbuf_buf(ar[i].term), lo) < 0))
+ lo = wrbuf_buf(ar[i].term);
+ }
+ if (!lo)
+ break;
+ if (scan_save_set(zh, stream, nmem, kc, zapt, limit_set, lo,
+ index_type, ar, ord_no, glist,
+ (pos >= 0 && pos < *num_entries) ? pos : -1))
+ pos++;
+
+ }
+ if (pos != *num_entries)
+ {
+ if (pos >= 0)
+ *num_entries = pos;
+ else
+ *num_entries = 0;
+ *is_partial = 1;
+ }
+
+ *list = glist;
+
+ return ZEBRA_OK;
+}
+
+struct scan1_info_entry {
+ char *term;
+ ISAM_P isam_p;
+};
+
+struct scan_info {
+ struct scan1_info_entry *list;
+ ODR odr;
+ int before, after;
+ char prefix[20];
+};
+
+static int scan_handle1(char *name, const char *info, int pos, void *client)
+{
+ int len_prefix, idx;
+ struct scan_info *scan_info = (struct scan_info *) client;
+
+ len_prefix = strlen(scan_info->prefix);
+ if (memcmp (name, scan_info->prefix, len_prefix))
+ return 1;
+ if (pos > 0)
+ idx = scan_info->after - pos + scan_info->before;
+ else
+ idx = - pos - 1;
+
+ /* skip special terms such as first-in-field specials */
+ if (name[len_prefix] < CHR_BASE_CHAR)
+ return 1;
+
+ if (idx < 0)
+ return 0;
+ scan_info->list[idx].term = (char *)
+ 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 (&scan_info->list[idx].isam_p, info+1, sizeof(ISAM_P));
+ return 0;
+}
+
+static ZEBRA_RES rpn_scan_ver1(ZebraHandle zh, ODR stream, NMEM rset_nmem,
+ struct rset_key_control *kc,
+ Z_AttributesPlusTerm *zapt,
+ int *position, int *num_entries,
+ ZebraScanEntry **list,
+ int *is_partial, RSET limit_set,
+ int index_type, int ord_no, int *ords)
+{
+ int pos = *position;
+ int num = *num_entries;
+ int before;
+ int after;
+ int i;
+ struct scan_info *scan_info_array;
+ char termz[IT_MAX_WORD+20];
+ ZebraScanEntry *glist;
+ int ptr[RPN_MAX_ORDS];
+
before = pos-1;
if (before < 0)
before = 0;
scan_info->after = after;
scan_info->odr = stream;
- scan_info->list = (struct scan_info_entry *)
+ scan_info->list = (struct scan1_info_entry *)
odr_malloc(stream, (before+after) * sizeof(*scan_info->list));
for (j = 0; j<before+after; j++)
scan_info->list[j].term = NULL;
return ZEBRA_FAIL;
dict_scan(zh->reg->dict, termz, &before_tmp, &after_tmp,
- scan_info, scan_handle);
+ scan_info, scan_handle1);
}
glist = (ZebraScanEntry *)
odr_malloc(stream, (before+after)*sizeof(*glist));
- rset_nmem = nmem_create();
- kc = zebra_key_control_create(zh);
-
/* consider terms after main term */
for (i = 0; i < ord_no; i++)
ptr[i] = before;
*is_partial = 1;
if (*num_entries < 0)
{
- (*kc->dec)(kc);
- nmem_destroy(rset_nmem);
*num_entries = 0;
return ZEBRA_OK;
}
glist[lo].occurrences = count;
rset_delete (rset);
}
- (*kc->dec)(kc);
- nmem_destroy(rset_nmem);
i = before-i;
if (i)
{
return ZEBRA_OK;
}
+
+ZEBRA_RES rpn_scan(ZebraHandle zh, ODR stream, Z_AttributesPlusTerm *zapt,
+ oid_value attributeset,
+ int num_bases, char **basenames,
+ int *position, int *num_entries, ZebraScanEntry **list,
+ int *is_partial, RSET limit_set)
+{
+ int base_no;
+ int ords[RPN_MAX_ORDS], ord_no = 0;
+
+ unsigned index_type;
+ char *search_type = NULL;
+ char rank_type[128];
+ int complete_flag;
+ int sort_flag;
+ NMEM nmem;
+ ZEBRA_RES res;
+ struct rset_key_control *kc = 0;
+
+ *list = 0;
+ *is_partial = 0;
+
+ if (attributeset == VAL_NONE)
+ attributeset = VAL_BIB1;
+
+ if (!limit_set) /* no limit set given already */
+ {
+ /* see if there is a @attr 8=set */
+ AttrType termset;
+ int termset_value_numeric;
+ const char *termset_value_string;
+ attr_init_APT(&termset, zapt, 8);
+ termset_value_numeric =
+ attr_find_ex(&termset, NULL, &termset_value_string);
+ if (termset_value_numeric != -1)
+ {
+ char resname[32];
+ const char *termset_name = 0;
+
+ if (termset_value_numeric != -2)
+ {
+
+ sprintf(resname, "%d", termset_value_numeric);
+ termset_name = resname;
+ }
+ else
+ termset_name = termset_value_string;
+
+ limit_set = resultSetRef (zh, termset_name);
+ }
+ }
+
+ yaz_log(YLOG_DEBUG, "position = %d, num = %d set=%d",
+ *position, *num_entries, attributeset);
+
+ if (zebra_maps_attr(zh->reg->zebra_maps, zapt, &index_type, &search_type,
+ rank_type, &complete_flag, &sort_flag))
+ {
+ *num_entries = 0;
+ zebra_setError(zh, YAZ_BIB1_UNSUPP_ATTRIBUTE_TYPE, 0);
+ return ZEBRA_FAIL;
+ }
+ if (num_bases > RPN_MAX_ORDS)
+ {
+ zebra_setError(zh, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
+ return ZEBRA_FAIL;
+ }
+
+ for (base_no = 0; base_no < num_bases; base_no++)
+ {
+ int ord;
+
+ if (zebraExplain_curDatabase (zh->reg->zei, basenames[base_no]))
+ {
+ zebra_setError(zh, YAZ_BIB1_DATABASE_UNAVAILABLE,
+ basenames[base_no]);
+ *num_entries = 0;
+ return ZEBRA_FAIL;
+ }
+ if (zebra_apt_get_ord(zh, zapt, index_type, 0, attributeset, &ord)
+ != ZEBRA_OK)
+ continue;
+ ords[ord_no++] = ord;
+ }
+ if (ord_no == 0)
+ {
+ *num_entries = 0; /* zebra_apt_get_ord should set error reason */
+ return ZEBRA_FAIL;
+ }
+ if (*num_entries < 1)
+ {
+ *num_entries = 0;
+ return ZEBRA_OK;
+ }
+ nmem = nmem_create();
+ kc = zebra_key_control_create(zh);
+
+ res = rpn_scan_ver2(zh, stream, nmem, kc, zapt, position, num_entries,
+ list,
+ is_partial, limit_set, index_type, ord_no, ords);
+ nmem_destroy(nmem);
+ (*kc->dec)(kc);
+ return res;
+}
+
/*
* Local variables:
* c-basic-offset: 4
projects / idzebra-moved-to-github.git / blobdiff