-/* $Id: rank1.c,v 1.14 2003-03-26 16:57:24 adam Exp $
+/* $Id: rank1.c,v 1.18 2004-10-26 15:32:11 heikki Exp $
Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003
Index Data Aps
#include <unistd.h>
#endif
-#define DEBUG_RANK 0
+#define DEBUG_RANK 1
#include "index.h"
struct rank_term_info {
int local_occur;
- int global_occur;
+ zint global_occur;
int global_inv;
int rank_flag;
int rank_weight;
+ TERMID term;
+ int term_index;
};
struct rank_set_info {
int no_entries;
int no_rank_entries;
struct rank_term_info *entries;
+ NMEM nmem;
};
static int log2_int (unsigned g)
*/
static void *create (ZebraHandle zh)
{
- struct rank_class_info *ci = (struct rank_class_info *)
- xmalloc (sizeof(*ci));
+ struct rank_class_info *ci =
+ (struct rank_class_info *) xmalloc (sizeof(*ci));
yaz_log (LOG_DEBUG, "rank-1 create");
return ci;
}
-/*
+/**
* begin: Prepares beginning of "real" ranking. Called once for
* each result set. The returned handle is a "set handle" and
* will be used in each of the handlers below.
*/
-static void *begin (struct zebra_register *reg, void *class_handle, RSET rset)
+static void *begin (struct zebra_register *reg,
+ void *class_handle, RSET rset, NMEM nmem,
+ TERMID *terms, int numterms)
{
- struct rank_set_info *si = (struct rank_set_info *) xmalloc (sizeof(*si));
+ struct rank_set_info *si =
+ (struct rank_set_info *) nmem_malloc (nmem,sizeof(*si));
int i;
#if DEBUG_RANK
yaz_log (LOG_LOG, "rank-1 begin");
#endif
- si->no_entries = rset->no_rset_terms;
+ si->no_entries = numterms;
si->no_rank_entries = 0;
+ si->nmem=nmem;
si->entries = (struct rank_term_info *)
- xmalloc (sizeof(*si->entries)*si->no_entries);
- for (i = 0; i < si->no_entries; i++)
+ nmem_malloc (si->nmem, sizeof(*si->entries)*numterms);
+ for (i = 0; i < numterms; i++)
{
- int g = rset->rset_terms[i]->nn;
+ zint g = rset_count(terms[i]->rset);
#if DEBUG_RANK
- yaz_log(LOG_LOG, "i=%d flags=%s", i, rset->rset_terms[i]->flags);
+ yaz_log(LOG_LOG, "i=%d flags=%s '%s'", i,
+ terms[i]->flags, terms[i]->name );
#endif
- if (!strncmp (rset->rset_terms[i]->flags, "rank,", 5))
+ if (!strncmp (terms[i]->flags, "rank,", 5))
{
- const char *cp = strstr(rset->rset_terms[i]->flags+4, ",w=");
+ const char *cp = strstr(terms[i]->flags+4, ",w=");
si->entries[i].rank_flag = 1;
if (cp)
si->entries[i].rank_weight = atoi (cp+3);
else
si->entries[i].rank_weight = 34;
#if DEBUG_RANK
- yaz_log (LOG_LOG, " i=%d weight=%d", i,
- si->entries[i].rank_weight);
+ yaz_log (LOG_LOG, " i=%d weight=%d g="ZINT_FORMAT, i,
+ si->entries[i].rank_weight, g);
#endif
(si->no_rank_entries)++;
}
else
si->entries[i].rank_flag = 0;
- si->entries[i].local_occur = 0;
+ si->entries[i].local_occur = 0; /* FIXME */
si->entries[i].global_occur = g;
si->entries[i].global_inv = 32 - log2_int (g);
- yaz_log (LOG_DEBUG, " global_inv = %d g = %d", 32 - log2_int (g), g);
+ yaz_log (LOG_DEBUG, " global_inv = %d g = " ZINT_FORMAT,
+ (int) (32-log2_int (g)), g);
+ si->entries[i].term=terms[i];
+ si->entries[i].term_index=i;
+ terms[i]->rankpriv=&(si->entries[i]);
}
return si;
}
*/
static void end (struct zebra_register *reg, void *set_handle)
{
- struct rank_set_info *si = (struct rank_set_info *) set_handle;
yaz_log (LOG_DEBUG, "rank-1 end");
- xfree (si->entries);
- xfree (si);
+ /* no need to free anything, they are in nmems */
}
-/*
+
+/**
* add: Called for each word occurence in a result set. This routine
* should be as fast as possible. This routine should "incrementally"
* update the score.
*/
-static void add (void *set_handle, int seqno, int term_index)
+static void add (void *set_handle, int seqno, TERMID term)
{
struct rank_set_info *si = (struct rank_set_info *) set_handle;
+ struct rank_term_info *ti= (struct rank_term_info *) term->rankpriv;
+ assert(si);
+ assert(term);
+ assert(ti);
#if DEBUG_RANK
- yaz_log (LOG_LOG, "rank-1 add seqno=%d term_index=%d", seqno, term_index);
+ yaz_log (LOG_LOG, "rank-1 add seqno=%d term=%s", seqno, term->name);
#endif
si->last_pos = seqno;
- si->entries[term_index].local_occur++;
+ ti->local_occur++;
}
/*
* score should be between 0 and 1000. If score cannot be obtained
* -1 should be returned.
*/
-static int calc (void *set_handle, int sysno)
+static int calc (void *set_handle, zint sysno)
{
int i, lo, divisor, score = 0;
struct rank_set_info *si = (struct rank_set_info *) set_handle;
for (i = 0; i < si->no_entries; i++)
{
#if DEBUG_RANK
- yaz_log(LOG_LOG, "i=%d rank_flag=%d lo=%d",
+ yaz_log(LOG_LOG, "calc: i=%d rank_flag=%d lo=%d",
i, si->entries[i].rank_flag, si->entries[i].local_occur);
#endif
if (si->entries[i].rank_flag && (lo = si->entries[i].local_occur))
divisor = si->no_rank_entries * (8+log2_int (si->last_pos/si->no_entries));
score = score / divisor;
#if DEBUG_RANK
- yaz_log (LOG_LOG, "sysno=%d score=%d", sysno, score);
+ yaz_log (LOG_LOG, "calc sysno=" ZINT_FORMAT " score=%d", sysno, score);
#endif
if (score > 1000)
score = 1000;