-/* $Id: rpnscan.c,v 1.2 2006-09-21 10:10:07 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;
+ 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;
+
+ /* skip special terms such as first-in-field specials */
+ if (name[len_prefix] < CHR_BASE_CHAR)
+ return 1;
+
+ wrbuf_rewind(scan_info->term);
+ wrbuf_puts(scan_info->term, name+len_prefix);
+
+ assert (*info == sizeof(ISAM_P));
+ memcpy (&scan_info->isam_p, info+1, sizeof(ISAM_P));
+ return 0;
+}
+
+
+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;
+ RSET rset = 0;
+ for (i = 0; i < ord_no; i++)
+ {
+ if (ar[i].isam_p && strcmp(wrbuf_buf(ar[i].term), term) == 0)
+ {
+ 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];
+
+ rsets[0] = rset;
+ rsets[1] = rset_t;
+ rset = rset_create_or(nmem, kc, kc->scope, 0 /* termid */,
+ 2, rsets);
+ }
+ 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);
+
+ 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;
+}
+
+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;
+ return ZEBRA_OK;
+ }
+ 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++)
+ {
+ 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;
+
+ /* 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;
+ }
+ /* see if we got all terms before.. */
+ dif = 1 + pos;
+ if (dif > 0)
+ {
+ /* 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;
+ }
+ for (i = 0; i < ord_no; i++)
+ {
+ 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;
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;
}
-
-#define RPN_MAX_ORDS 32
-
-static ZEBRA_RES rpn_scan_ver1(ZebraHandle zh, ODR stream,
+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 return_zero,
int index_type, int ord_no, int *ords)
{
int pos = *position;
struct scan_info *scan_info_array;
char termz[IT_MAX_WORD+20];
ZebraScanEntry *glist;
- NMEM rset_nmem = 0;
- struct rset_key_control *kc = 0;
int ptr[RPN_MAX_ORDS];
before = pos-1;
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)
{
oid_value attributeset,
int num_bases, char **basenames,
int *position, int *num_entries, ZebraScanEntry **list,
- int *is_partial, RSET limit_set, int return_zero)
+ int *is_partial, RSET limit_set)
{
int base_no;
int ords[RPN_MAX_ORDS], ord_no = 0;
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;
*num_entries = 0; /* zebra_apt_get_ord should set error reason */
return ZEBRA_FAIL;
}
- /* prepare dictionary scanning */
if (*num_entries < 1)
{
*num_entries = 0;
- return ZEBRA_OK;
+ return ZEBRA_OK;
}
- return rpn_scan_ver1(zh, stream, zapt, position, num_entries, list,
- is_partial, limit_set, return_zero,
- index_type, ord_no, ords);
+ 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;
}
/*
projects / idzebra-moved-to-github.git / blobdiff