X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=rset%2Frsbetween.c;h=774535c7f18b8ec83f55b6f5fc1a5e307fed1093;hb=2b99f08490d3bd763bb086693044a6db10c0bcf9;hp=6b84aeda1fffefd43795c67e18b3c939d9c1d405;hpb=9710e24853b43d708fd00be62a8f9361296f3533;p=idzebra-moved-to-github.git
diff --git a/rset/rsbetween.c b/rset/rsbetween.c
index 6b84aed..774535c 100644
--- a/rset/rsbetween.c
+++ b/rset/rsbetween.c
@@ -1,25 +1,53 @@
-/*
- * Copyright (C) 1994-2002, Index Data
- * All rights reserved.
- * Heikki Levanto
- *
- * $Id: rsbetween.c,v 1.4 2002-04-12 15:03:46 heikki Exp $
- */
+/* $Id: rsbetween.c,v 1.16 2004-08-04 09:59:03 heikki Exp $
+ Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002
+ Index Data Aps
+
+This file is part of the Zebra server.
+
+Zebra is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Zebra; see the file LICENSE.zebra. If not, write to the
+Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.
+*/
+
+
+/* rsbetween is (mostly) used for xml searches. It returns the hits of the
+ * "middle" rset, that are in between the "left" and "right" rsets. For
+ * example "Shakespeare" in between "" and . The thing is
+ * complicated by the inclusion of attributes (from their own rset). If attrs
+ * specified, they must match the "left" rset (start tag). "Hamlet" between
+ * "" and "". (This assumes that the attributes are
+ * indexed to the same seqno as the tags).
+*/
#include
#include
#include
#include
-#include
#include
+#include
+
+#define RSBETWEEN_DEBUG 0
static void *r_create_between(RSET ct, const struct rset_control *sel, void *parms);
static RSFD r_open_between (RSET ct, int flag);
static void r_close_between (RSFD rfd);
static void r_delete_between (RSET ct);
static void r_rewind_between (RSFD rfd);
-static int r_count_between (RSET ct);
+static int r_forward_between(RSET ct, RSFD rfd, void *buf, int *term_index,
+ int (*cmpfunc)(const void *p1, const void *p2),
+ const void *untilbuf);
static int r_read_between (RSFD rfd, void *buf, int *term_index);
static int r_write_between (RSFD rfd, const void *buf);
@@ -31,7 +59,8 @@ static const struct rset_control control_between =
r_close_between,
r_delete_between,
r_rewind_between,
- r_count_between,
+ r_forward_between, /* rset_default_forward, */
+ rset_default_pos,
r_read_between,
r_write_between,
};
@@ -44,6 +73,7 @@ struct rset_between_info {
RSET rset_l;
RSET rset_m;
RSET rset_r;
+ RSET rset_attr;
int term_index_s;
int (*cmp)(const void *p1, const void *p2);
char *(*printer)(const void *p1, char *buf);
@@ -54,21 +84,40 @@ struct rset_between_rfd {
RSFD rfd_l;
RSFD rfd_m;
RSFD rfd_r;
+ RSFD rfd_attr;
int more_l;
int more_m;
int more_r;
+ int more_attr;
int term_index_l;
int term_index_m;
int term_index_r;
void *buf_l;
void *buf_m;
void *buf_r;
+ void *buf_attr;
int level;
struct rset_between_rfd *next;
struct rset_between_info *info;
};
-static void *r_create_between (RSET ct, const struct rset_control *sel, void *parms)
+#if RSBETWEEN_DEBUG
+static void log2 (struct rset_between_rfd *p, char *msg, int cmp_l, int cmp_r)
+{
+ char buf_l[32];
+ char buf_m[32];
+ char buf_r[32];
+ logf(LOG_DEBUG,"btw: %s l=%s(%d/%d) m=%s(%d) r=%s(%d/%d), lev=%d",
+ msg,
+ (*p->info->printer)(p->buf_l, buf_l), p->more_l, cmp_l,
+ (*p->info->printer)(p->buf_m, buf_m), p->more_m,
+ (*p->info->printer)(p->buf_r, buf_r), p->more_r, cmp_r,
+ p->level);
+}
+#endif
+
+static void *r_create_between (RSET ct, const struct rset_control *sel,
+ void *parms)
{
rset_between_parms *between_parms = (rset_between_parms *) parms;
struct rset_between_info *info;
@@ -78,6 +127,7 @@ static void *r_create_between (RSET ct, const struct rset_control *sel, void *pa
info->rset_l = between_parms->rset_l;
info->rset_m = between_parms->rset_m;
info->rset_r = between_parms->rset_r;
+ info->rset_attr = between_parms->rset_attr;
if (rset_is_volatile(info->rset_l) ||
rset_is_volatile(info->rset_m) ||
rset_is_volatile(info->rset_r))
@@ -87,22 +137,38 @@ static void *r_create_between (RSET ct, const struct rset_control *sel, void *pa
info->rfd_list = NULL;
info->term_index_s = info->rset_l->no_rset_terms;
- ct->no_rset_terms =
- info->rset_l->no_rset_terms +
- info->rset_m->no_rset_terms +
- info->rset_r->no_rset_terms;
- ct->rset_terms = (RSET_TERM *)
- xmalloc (sizeof (*ct->rset_terms) * ct->no_rset_terms);
-
- memcpy (ct->rset_terms, info->rset_l->rset_terms,
- info->rset_l->no_rset_terms * sizeof(*ct->rset_terms));
- memcpy (ct->rset_terms + info->rset_l->no_rset_terms,
- info->rset_m->rset_terms,
- info->rset_m->no_rset_terms * sizeof(*ct->rset_terms));
- memcpy (ct->rset_terms + info->rset_l->no_rset_terms +
- info->rset_m->no_rset_terms,
- info->rset_r->rset_terms,
- info->rset_r->no_rset_terms * sizeof(*ct->rset_terms));
+ if (info->rset_m)
+ {
+ ct->no_rset_terms =
+ info->rset_l->no_rset_terms +
+ info->rset_m->no_rset_terms +
+ info->rset_r->no_rset_terms;
+ ct->rset_terms = (RSET_TERM *)
+ xmalloc (sizeof (*ct->rset_terms) * ct->no_rset_terms);
+ memcpy (ct->rset_terms, info->rset_l->rset_terms,
+ info->rset_l->no_rset_terms * sizeof(*ct->rset_terms));
+ memcpy (ct->rset_terms + info->rset_l->no_rset_terms,
+ info->rset_m->rset_terms,
+ info->rset_m->no_rset_terms * sizeof(*ct->rset_terms));
+ memcpy (ct->rset_terms + info->rset_l->no_rset_terms +
+ info->rset_m->no_rset_terms,
+ info->rset_r->rset_terms,
+ info->rset_r->no_rset_terms * sizeof(*ct->rset_terms));
+ }
+ else
+ {
+ ct->no_rset_terms =
+ info->rset_l->no_rset_terms +
+ info->rset_r->no_rset_terms;
+ ct->rset_terms = (RSET_TERM *)
+ xmalloc (sizeof (*ct->rset_terms) * ct->no_rset_terms);
+ memcpy (ct->rset_terms, info->rset_l->rset_terms,
+ info->rset_l->no_rset_terms * sizeof(*ct->rset_terms));
+ memcpy (ct->rset_terms + info->rset_l->no_rset_terms,
+ info->rset_r->rset_terms,
+ info->rset_r->no_rset_terms * sizeof(*ct->rset_terms));
+ }
+
return info;
}
@@ -113,8 +179,8 @@ static RSFD r_open_between (RSET ct, int flag)
if (flag & RSETF_WRITE)
{
- logf (LOG_FATAL, "between set type is read-only");
- return NULL;
+ logf (LOG_FATAL, "between set type is read-only");
+ return NULL;
}
rfd = (struct rset_between_rfd *) xmalloc (sizeof(*rfd));
rfd->next = info->rfd_list;
@@ -124,15 +190,25 @@ static RSFD r_open_between (RSET ct, int flag)
rfd->buf_l = xmalloc (info->key_size);
rfd->buf_m = xmalloc (info->key_size);
rfd->buf_r = xmalloc (info->key_size);
+ rfd->buf_attr = xmalloc (info->key_size);
+
rfd->rfd_l = rset_open (info->rset_l, RSETF_READ);
rfd->rfd_m = rset_open (info->rset_m, RSETF_READ);
rfd->rfd_r = rset_open (info->rset_r, RSETF_READ);
+
rfd->more_l = rset_read (info->rset_l, rfd->rfd_l, rfd->buf_l,
- &rfd->term_index_l);
+ &rfd->term_index_l);
rfd->more_m = rset_read (info->rset_m, rfd->rfd_m, rfd->buf_m,
- &rfd->term_index_m);
+ &rfd->term_index_m);
rfd->more_r = rset_read (info->rset_r, rfd->rfd_r, rfd->buf_r,
- &rfd->term_index_r);
+ &rfd->term_index_r);
+ if (info->rset_attr)
+ {
+ int dummy;
+ rfd->rfd_attr = rset_open (info->rset_attr, RSETF_READ);
+ rfd->more_attr = rset_read (info->rset_attr, rfd->rfd_attr,
+ rfd->buf_attr, &dummy);
+ }
rfd->level=0;
return rfd;
}
@@ -148,9 +224,13 @@ static void r_close_between (RSFD rfd)
xfree ((*rfdp)->buf_l);
xfree ((*rfdp)->buf_m);
xfree ((*rfdp)->buf_r);
+ xfree ((*rfdp)->buf_attr);
rset_close (info->rset_l, (*rfdp)->rfd_l);
rset_close (info->rset_m, (*rfdp)->rfd_m);
rset_close (info->rset_r, (*rfdp)->rfd_r);
+ if (info->rset_attr)
+ rset_close (info->rset_attr, (*rfdp)->rfd_attr);
+
*rfdp = (*rfdp)->next;
xfree (rfd);
return;
@@ -168,6 +248,8 @@ static void r_delete_between (RSET ct)
rset_delete (info->rset_l);
rset_delete (info->rset_m);
rset_delete (info->rset_r);
+ if (info->rset_attr)
+ rset_delete (info->rset_attr);
xfree (info);
}
@@ -176,111 +258,260 @@ static void r_rewind_between (RSFD rfd)
struct rset_between_info *info = ((struct rset_between_rfd*)rfd)->info;
struct rset_between_rfd *p = (struct rset_between_rfd *) rfd;
+#if RSBETWEEN_DEBUG
logf (LOG_DEBUG, "rsbetween_rewind");
+#endif
rset_rewind (info->rset_l, p->rfd_l);
rset_rewind (info->rset_m, p->rfd_m);
rset_rewind (info->rset_r, p->rfd_r);
p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l, &p->term_index_l);
p->more_m = rset_read (info->rset_m, p->rfd_m, p->buf_m, &p->term_index_m);
p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r, &p->term_index_r);
+ if (info->rset_attr)
+ {
+ int dummy;
+ rset_rewind (info->rset_attr, p->rfd_attr);
+ p->more_attr = rset_read (info->rset_attr, p->rfd_attr, p->buf_attr,
+ &dummy);
+ }
p->level=0;
}
-static int r_count_between (RSET ct)
-{
- return 0;
-}
-static void logit( struct rset_between_info *info, char *prefix, void *l, void *m, void *r)
+
+static int r_forward_between(RSET ct, RSFD rfd, void *buf, int *term_index,
+ int (*cmpfunc)(const void *p1, const void *p2),
+ const void *untilbuf)
{
- char buf_l[32];
- char buf_m[32];
- char buf_r[32];
- logf(LOG_DEBUG,"btw: %s l=%s m=%s r=%s",
- prefix,
- (*info->printer)(l, buf_l),
- (*info->printer)(m, buf_m),
- (*info->printer)(r, buf_r) );
+ struct rset_between_info *info = ((struct rset_between_rfd*)rfd)->info;
+ struct rset_between_rfd *p = (struct rset_between_rfd *) rfd;
+ int rc;
+#if RSBETWEEN_DEBUG
+ log2( p, "fwd: before forward", 0,0);
+#endif
+ /* It is enough to forward the m pointer here, the read will */
+ /* naturally forward the l, m, and attr pointers */
+ if (p->more_m)
+ p->more_m=rset_forward(info->rset_m,p->rfd_m, p->buf_m,
+ &p->term_index_m, info->cmp,untilbuf);
+#if RSBETWEEN_DEBUG
+ log2( p, "fwd: after forward M", 0,0);
+#endif
+ rc = r_read_between(rfd, buf, term_index);
+#if RSBETWEEN_DEBUG
+ log2( p, "fwd: after forward", 0,0);
+#endif
+ return rc;
}
+
+
+
static int r_read_between (RSFD rfd, void *buf, int *term_index)
{
struct rset_between_rfd *p = (struct rset_between_rfd *) rfd;
struct rset_between_info *info = p->info;
- int cmp_l;
- int cmp_r;
+ int cmp_l=0;
+ int cmp_r=0;
+ int attr_match = 0;
while (p->more_m)
{
- logit( info, "start of loop", p->buf_l, p->buf_m, p->buf_r);
+#if RSBETWEEN_DEBUG
+ log2( p, "start of loop", cmp_l, cmp_r);
+#endif
- /* forward L until past m, count levels, note rec boundaries */
- if (p->more_l)
- cmp_l= (*info->cmp)(p->buf_l, p->buf_m);
- else
- cmp_l=2; /* past this record */
- logf(LOG_DEBUG, "cmp_l=%d", cmp_l);
+ /* forward L until past m, count levels, note rec boundaries */
+ if (p->more_l)
+ cmp_l= (*info->cmp)(p->buf_l, p->buf_m);
+ else
+ {
+ p->level = 0;
+ cmp_l=2; /* past this record */
+ }
+#if RSBETWEEN_DEBUG
+ log2( p, "after first L", cmp_l, cmp_r);
+#endif
while (cmp_l < 0) /* l before m */
- {
+ {
if (cmp_l == -2)
- p->level=0; /* earlier record */
+ p->level=0; /* earlier record */
if (cmp_l == -1)
- p->level++; /* relevant start tag */
- if (p->more_l)
+ {
+ p->level++; /* relevant start tag */
+
+ if (!info->rset_attr)
+ attr_match = 1;
+ else
+ {
+ int cmp_attr;
+ int dummy_term;
+ attr_match = 0;
+ while (p->more_attr)
+ {
+ cmp_attr = (*info->cmp)(p->buf_attr, p->buf_l);
+ if (cmp_attr == 0)
+ {
+ attr_match = 1;
+ break;
+ }
+ else if (cmp_attr > 0)
+ break;
+ else if (cmp_attr==-1)
+ p->more_attr = rset_read (info->rset_attr, p->rfd_attr,
+ p->buf_attr, &dummy_term);
+ /* if we had a forward that went all the way to
+ * the seqno, we could use that. But fwd only goes
+ * to the sysno */
+ else if (cmp_attr==-2)
+ {
+ p->more_attr = rset_forward(
+ info->rset_attr, p->rfd_attr,
+ p->buf_attr, &dummy_term,
+ info->cmp, p->buf_l);
+#if RSBETWEEN_DEBUG
+ logf(LOG_DEBUG, "btw: after frowarding attr m=%d",p->more_attr);
+#endif
+ }
+ } /* while more_attr */
+ }
+ }
+#define NEWCODE 1
+#if NEWCODE
+ if (cmp_l==-2)
+ {
+ if (p->more_l)
+ {
+ p->more_l=rset_forward(
+ info->rset_l, p->rfd_l,
+ p->buf_l, &p->term_index_l,
+ info->cmp, p->buf_m);
+ if (p->more_l)
+ cmp_l= (*info->cmp)(p->buf_l, p->buf_m);
+ else
+ cmp_l=2;
+#if RSBETWEEN_DEBUG
+ log2( p, "after forwarding L", cmp_l, cmp_r);
+#endif
+ }
+ } else
{
p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
- &p->term_index_l);
- cmp_l= (*info->cmp)(p->buf_l, p->buf_m);
- logit( info, "forwarded L", p->buf_l, p->buf_m, p->buf_r);
- logf(LOG_DEBUG, " cmp_l=%d", cmp_l);
+ &p->term_index_l);
+ }
+#else
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+#endif
+ if (p->more_l)
+ {
+ cmp_l= (*info->cmp)(p->buf_l, p->buf_m);
}
else
- cmp_l=2;
+ cmp_l=2;
+#if RSBETWEEN_DEBUG
+ log2( p, "end of L loop", cmp_l, cmp_r);
+#endif
} /* forward L */
-
- /* forward R until past m, count levels */
+
+
+ /* forward R until past m, count levels */
+#if RSBETWEEN_DEBUG
+ log2( p, "Before moving R", cmp_l, cmp_r);
+#endif
if (p->more_r)
- cmp_r= (*info->cmp)(p->buf_r, p->buf_m);
- else
- cmp_r=2;
- logf(LOG_DEBUG, "cmp_r=%d", cmp_r);
+ cmp_r= (*info->cmp)(p->buf_r, p->buf_m);
+ else
+ cmp_r=2;
+#if RSBETWEEN_DEBUG
+ log2( p, "after first R", cmp_l, cmp_r);
+#endif
while (cmp_r < 0) /* r before m */
- {
- /* -2, earlier record, doesn't matter */
+ {
+ /* -2, earlier record, don't count level */
if (cmp_r == -1)
- p->level--; /* relevant end tag */
+ p->level--; /* relevant end tag */
if (p->more_r)
{
+#if NEWCODE
+ if (cmp_r==-2)
+ {
+ p->more_r=rset_forward(
+ info->rset_r, p->rfd_r,
+ p->buf_r, &p->term_index_r,
+ info->cmp, p->buf_m);
+ } else
+ {
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ }
+ if (p->more_r)
+ cmp_r= (*info->cmp)(p->buf_r, p->buf_m);
+
+#else
p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
- &p->term_index_r);
- cmp_r= (*info->cmp)(p->buf_r, p->buf_m);
- logit( info, "forwarded R", p->buf_l, p->buf_m, p->buf_r);
- logf(LOG_DEBUG, " cmp_r=%d", cmp_r);
+ &p->term_index_r);
+ cmp_r= (*info->cmp)(p->buf_r, p->buf_m);
+#endif
}
else
- cmp_r=2;
+ cmp_r=2;
+#if RSBETWEEN_DEBUG
+ log2( p, "End of R loop", cmp_l, cmp_r);
+#endif
} /* forward R */
-
- if ( ( p->level <= 0 ) && ! p->more_l)
- return 0; /* no more start tags, nothing more to find */
-
- if ( p->level > 0) /* within a tag pair (or deeper) */
- {
- memcpy (buf, p->buf_m, info->key_size);
- *term_index = p->term_index_m;
- logit( info, "Returning a hit (m)", p->buf_l, p->buf_m, p->buf_r);
- return 1;
- }
- else
- if ( ! p->more_l ) /* not in data, no more starts */
- return 0; /* ergo, nothing can be found. stop scanning */
+ if ( ( p->level <= 0 ) && ! p->more_l)
+ return 0; /* no more start tags, nothing more to find */
+
+ if ( attr_match && p->level > 0) /* within a tag pair (or deeper) */
+ {
+ memcpy (buf, p->buf_m, info->key_size);
+ *term_index = p->term_index_m;
+#if RSBETWEEN_DEBUG
+ log2( p, "Returning a hit (and forwarding m)", cmp_l, cmp_r);
+#endif
+ p->more_m = rset_read (info->rset_m, p->rfd_m, p->buf_m,
+ &p->term_index_m);
+ if (cmp_l == 2)
+ p->level = 0;
+ return 1;
+ }
+ else if ( ! p->more_l ) /* not in data, no more starts */
+ {
+#if RSBETWEEN_DEBUG
+ log2( p, "no more starts, exiting without a hit", cmp_l, cmp_r);
+#endif
+ return 0; /* ergo, nothing can be found. stop scanning */
+ }
+#if NEWCODE
+ if (cmp_l == 2)
+ {
+ p->level = 0;
+ p->more_m=rset_forward(
+ info->rset_m, p->rfd_m,
+ p->buf_m, &p->term_index_m,
+ info->cmp, p->buf_l);
+ } else
+ {
+ p->more_m = rset_read (info->rset_m, p->rfd_m, p->buf_m,
+ &p->term_index_m);
+ }
+#else
+ if (cmp_l == 2)
+ p->level = 0;
p->more_m = rset_read (info->rset_m, p->rfd_m, p->buf_m,
&p->term_index_m);
+#endif
+#if RSBETWEEN_DEBUG
+ log2( p, "End of M loop", cmp_l, cmp_r);
+#endif
} /* while more_m */
-
- logf(LOG_DEBUG,"Exiting, no more stuff in m");
+
+#if RSBETWEEN_DEBUG
+ log2( p, "Exiting, nothing more in m", cmp_l, cmp_r);
+#endif
return 0; /* no more data possible */