-/* $Id: rsprox.c,v 1.13 2004-08-31 10:43:40 heikki Exp $
+/* $Id: rsprox.c,v 1.18 2004-10-15 10:07:34 heikki Exp $
Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004
Index Data Aps
#include <assert.h>
#include <zebrautl.h>
-#include <rsprox.h>
+#include <rset.h>
#ifndef RSET_DEBUG
#define RSET_DEBUG 0
static RSFD r_open (RSET ct, int flag);
static void r_close (RSFD rfd);
static void r_delete (RSET ct);
-static void r_rewind (RSFD rfd);
-static int r_forward(RSFD rfd, void *buf,
- int (*cmpfunc)(const void *p1, const void *p2),
- const void *untilbuf);
-static int r_read (RSFD rfd, void *buf);
+static int r_forward(RSFD rfd, void *buf, TERMID *term, const void *untilbuf);
+static int r_read (RSFD rfd, void *buf, TERMID *term);
static int r_write (RSFD rfd, const void *buf);
static void r_pos (RSFD rfd, double *current, double *total);
r_delete,
r_open,
r_close,
- r_rewind,
r_forward,
r_pos,
r_read,
const struct rset_control *rset_kind_prox = &control;
struct rset_prox_info {
-/* struct rset_prox_parms p; */
- RSET *rset;
- int rset_no;
+ RSET *rset; /* array of 'child' rsets */
+ int rset_no; /* how many of them */
int ordered;
int exclusion;
int relation;
int distance;
- int key_size;
- int (*cmp)(const void *p1, const void *p2);
- int (*getseq)(const void *p);
};
struct rset_prox_rfd {
RSFD *rfd;
char **buf; /* lookahead key buffers */
char *more; /* more in each lookahead? */
+ TERMID *terms; /* lookahead terms */
zint hits;
};
-RSET rsprox_create( NMEM nmem, int key_size,
- int (*cmp)(const void *p1, const void *p2),
- int (*getseq)(const void *p),
+RSET rsprox_create( NMEM nmem, const struct key_control *kcontrol, int scope,
int rset_no, RSET *rset,
int ordered, int exclusion,
int relation, int distance)
{
- RSET rnew=rset_create_base(&control, nmem);
+ RSET rnew=rset_create_base(&control, nmem, kcontrol, scope,0);
struct rset_prox_info *info;
info = (struct rset_prox_info *) nmem_malloc(rnew->nmem,sizeof(*info));
- info->key_size = key_size;
- info->cmp = cmp;
- info->getseq=getseq; /* FIXME - what about multi-level stuff ?? */
info->rset = nmem_malloc(rnew->nmem,rset_no * sizeof(*info->rset));
memcpy(info->rset, rset,
rset_no * sizeof(*info->rset));
rfd->priv=p;
p->more = nmem_malloc (ct->nmem,sizeof(*p->more) * info->rset_no);
p->buf = nmem_malloc(ct->nmem,sizeof(*p->buf) * info->rset_no);
- for (i = 0; i < info->rset_no; i++)
- p->buf[i] = nmem_malloc(ct->nmem,info->key_size);
+ p->terms = nmem_malloc(ct->nmem,sizeof(*p->terms) * info->rset_no);
+ for (i = 0; i < info->rset_no; i++)
+ {
+ p->buf[i] = nmem_malloc(ct->nmem,ct->keycontrol->key_size);
+ p->terms[i] = 0;
+ }
p->rfd = nmem_malloc(ct->nmem,sizeof(*p->rfd) * info->rset_no);
}
- logf(LOG_DEBUG,"rsprox (%s) open [%p]", ct->control->desc, rfd);
+ logf(LOG_DEBUG,"rsprox (%s) open [%p] n=%d",
+ ct->control->desc, rfd, info->rset_no);
for (i = 0; i < info->rset_no; i++) {
p->rfd[i] = rset_open (info->rset[i], RSETF_READ);
- p->more[i] = rset_read (p->rfd[i], p->buf[i]);
+ p->more[i] = rset_read (p->rfd[i], p->buf[i], &p->terms[i]);
}
p->hits=0;
return rfd;
rfd_delete_base(rfd);
}
-static void r_rewind (RSFD rfd)
-{
- struct rset_prox_info *info = (struct rset_prox_info *)(rfd->rset->priv);
- struct rset_prox_rfd *p=(struct rset_prox_rfd *)(rfd->priv);
- int i;
-
- logf (LOG_DEBUG, "rsprox_rewind");
-
- for (i = 0; i < info->rset_no; i++)
- {
- rset_rewind (p->rfd[i]);
- p->more[i] = rset_read (p->rfd[i], p->buf[i]);
- }
- p->hits=0;
-}
-
-static int r_forward (RSFD rfd, void *buf,
- int (*cmpfunc)(const void *p1, const void *p2),
- const void *untilbuf)
+static int r_forward (RSFD rfd, void *buf, TERMID *term, const void *untilbuf)
{
struct rset_prox_info *info = (struct rset_prox_info *)(rfd->rset->priv);
struct rset_prox_rfd *p=(struct rset_prox_rfd *)(rfd->priv);
+ const struct key_control *kctrl=rfd->rset->keycontrol;
int cmp=0;
int i;
if (untilbuf)
{
/* it is enough to forward first one. Other will follow. */
- if ( p->more[0] && ((cmpfunc)(untilbuf, p->buf[0]) >= 2) )
+ if ( p->more[0] && /* was: cmp >=2 */
+ ((kctrl->cmp)(untilbuf, p->buf[0]) >= rfd->rset->scope) )
p->more[0] = rset_forward(p->rfd[0], p->buf[0],
- info->cmp, untilbuf);
+ &p->terms[0], untilbuf);
}
if (info->ordered && info->relation == 3 && info->exclusion == 0
&& info->distance == 1)
p->more[0] = 0; /* saves us a goto out of while loop. */
break;
}
- cmp = (*info->cmp) (p->buf[i], p->buf[i-1]);
- if (cmp > 1)
+ cmp = (*kctrl->cmp) (p->buf[i], p->buf[i-1]);
+ if (cmp >= rfd->rset->scope ) /* cmp>1 */
{
p->more[i-1] = rset_forward (p->rfd[i-1],
p->buf[i-1],
- info->cmp,
+ &p->terms[i-1],
p->buf[i]);
break;
}
- else if (cmp == 1)
+ else if ( cmp>0 ) /* cmp == 1*/
{
- if ((*info->getseq)(p->buf[i-1]) +1 !=
- (*info->getseq)(p->buf[i]))
+ if ((*kctrl->getseq)(p->buf[i-1]) +1 !=
+ (*kctrl->getseq)(p->buf[i]))
{ /* FIXME - We need more flexible multilevel stuff */
- p->more[i-1] = rset_read ( p->rfd[i-1], p->buf[i-1]);
+ p->more[i-1] = rset_read ( p->rfd[i-1], p->buf[i-1],
+ &p->terms[i]);
break;
}
}
else
{
- p->more[i] = rset_forward (p->rfd[i], p->buf[i],
- info->cmp, p->buf[i-1]);
+ p->more[i] = rset_forward (p->rfd[i],
+ p->buf[i], &p->terms[i], p->buf[i-1]);
break;
}
}
if (i == info->rset_no)
{
- memcpy (buf, p->buf[0], info->key_size);
- p->more[0] = rset_read (p->rfd[0], p->buf[0]);
+ memcpy (buf, p->buf[0], kctrl->key_size);
+ if (term)
+ *term=p->terms[i];
+ p->more[0] = rset_read (p->rfd[0], p->buf[0], &p->terms[i]);
p->hits++;
return 1;
}
{
while (p->more[0] && p->more[1])
{
- int cmp = (*info->cmp)(p->buf[0], p->buf[1]);
- if (cmp < -1)
- p->more[0] = rset_forward (p->rfd[0],
- p->buf[0], info->cmp, p->buf[0]);
- else if (cmp > 1)
- p->more[1] = rset_forward (p->rfd[1],
- p->buf[1], info->cmp, p->buf[1]);
+ int cmp = (*kctrl->cmp)(p->buf[0], p->buf[1]);
+ if ( cmp <= - rfd->rset->scope) /* cmp<-1*/
+ p->more[0] = rset_forward (p->rfd[0], p->buf[0],
+ &p->terms[0],p->buf[1]);
+ else if ( cmp >= rfd->rset->scope ) /* cmp>1 */
+ p->more[1] = rset_forward (p->rfd[1], p->buf[1],
+ &p->terms[1],p->buf[0]);
else
{
- int seqno[500];
+ zint seqno[500]; /* FIXME - why 500 ?? */
int n = 0;
- seqno[n++] = (*info->getseq)(p->buf[0]);
+ seqno[n++] = (*kctrl->getseq)(p->buf[0]);
while ((p->more[0] = rset_read (p->rfd[0],
- p->buf[0])) >= -1 &&
+ p->buf[0], &p->terms[0])) >= -1 &&
p->more[0] <= -1)
if (n < 500)
- seqno[n++] = (*info->getseq)(p->buf[0]);
+ seqno[n++] = (*kctrl->getseq)(p->buf[0]);
for (i = 0; i<n; i++)
{
- int diff = (*info->getseq)(p->buf[1]) - seqno[i];
+ int diff = (*kctrl->getseq)(p->buf[1]) - seqno[i];
int excl = info->exclusion;
if (!info->ordered && diff < 0)
diff = -diff;
}
if (excl)
{
- memcpy (buf, p->buf[1], info->key_size);
-
- p->more[1] = rset_read ( p->rfd[1], p->buf[1]);
+ memcpy (buf, p->buf[1], kctrl->key_size);
+ if (term)
+ *term=p->terms[1];
+ p->more[1] = rset_read ( p->rfd[1], p->buf[1],
+ &p->terms[1]);
p->hits++;
return 1;
}
}
- p->more[1] = rset_read (p->rfd[1], p->buf[1]);
+ p->more[1] = rset_read (p->rfd[1], p->buf[1],&p->terms[i]);
}
}
}
}
-static int r_read (RSFD rfd, void *buf)
+static int r_read (RSFD rfd, void *buf, TERMID *term)
{
- return r_forward(rfd, buf, 0, 0);
+ return r_forward(rfd, buf, term, 0);
}
static int r_write (RSFD rfd, const void *buf)