the new multior. Seems to work, forwards OK, does not yet estimate pos.

[idzebra-moved-to-github.git] / rset / rset.c

diff --git a/rset/rset.c b/rset/rset.c
index d6bab13..254ee08 100644 (file)
--- a/rset/rset.c
+++ b/rset/rset.c
@@ -1,65 +1,34 @@
-/*
- * Copyright (C) 1994-1999, Index Data
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: rset.c,v $
- * Revision 1.14  1999-05-26 07:49:14  adam
- * C++ compilation.
- *
- * Revision 1.13  1999/02/02 14:51:33  adam
- * Updated WIN32 code specific sections. Changed header.
- *
- * Revision 1.12  1998/04/26 10:56:57  adam
- * Added include of string.h.
- *
- * Revision 1.11  1998/03/05 08:36:28  adam
- * New result set model.
- *
- * Revision 1.10  1998/02/10 11:56:46  adam
- * Implemented rset_dup.
- *
- * Revision 1.9  1996/10/29 13:55:21  adam
- * Include of zebrautl.h instead of alexutil.h.
- *
- * Revision 1.8  1995/12/11 09:15:23  adam
- * New set types: sand/sor/snot - ranked versions of and/or/not in
- * ranked/semi-ranked result sets.
- * Note: the snot not finished yet.
- * New rset member: flag.
- * Bug fix: r_delete in rsrel.c did free bad memory block.
- *
- * Revision 1.7  1995/10/12  12:41:56  adam
- * Private info (buf) moved from struct rset_control to struct rset.
- * Bug fixes in relevance.
- *
- * Revision 1.6  1995/09/08  14:52:41  adam
- * Work on relevance feedback.
- *
- * Revision 1.5  1995/09/07  13:58:43  adam
- * New parameter: result-set file descriptor (RSFD) to support multiple
- * positions within the same result-set.
- * Boolean operators: and, or, not implemented.
- *
- * Revision 1.4  1995/09/06  16:11:56  adam
- * More work on boolean sets.
- *
- * Revision 1.3  1995/09/04  15:20:39  adam
- * More work on temp sets. is_open member removed.
- *
- * Revision 1.2  1995/09/04  12:33:56  adam
- * Various cleanup. YAZ util used instead.
- *
- * Revision 1.1  1994/11/04  13:21:28  quinn
- * Working.
- *
- */
+/* $Id: rset.c,v 1.24 2004-08-19 12:49:15 heikki Exp $
+   Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004
+   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.
+*/
+
+
 
 #include <stdio.h>
 #include <string.h>
 #include <zebrautl.h>
+#include <assert.h>
 
 #include <rset.h>
+#include <../index/index.h> /* for log_keydump. Debugging only */
 
 RSET rset_create(const struct rset_control *sel, void *parms)
 {
@@ -96,13 +65,47 @@ RSET rset_dup (RSET rs)
     return rs;
 }
 
+void rset_default_pos (RSFD rfd, double *current, double *total)
+{ /* This should never really be needed, but it is still used in */
+  /* those rsets that we don't really plan to use, like isam-s */
+    assert(rfd);
+    assert(current);
+    assert(total);
+    *current=-1; /* signal that pos is not implemented */
+    *total=-1;
+} /* rset_default_pos */
+
+int rset_default_forward(RSET ct, RSFD rfd, void *buf, int *term_index, 
+                           int (*cmpfunc)(const void *p1, const void *p2), 
+                           const void *untilbuf)
+{
+    int more=1;
+    int cmp=2;
+    logf (LOG_DEBUG, "rset_default_forward starting '%s' (ct=%p rfd=%p)",
+                    ct->control->desc, ct,rfd);
+    key_logdump(LOG_DEBUG, untilbuf);
+    while ( (cmp==2) && (more))
+    {
+        logf (LOG_DEBUG, "rset_default_forward looping m=%d c=%d",more,cmp);
+        more=rset_read(ct, rfd, buf, term_index);
+        if (more)
+            cmp=(*cmpfunc)(untilbuf,buf);
+        if (more)
+            key_logdump(LOG_DEBUG,buf);
+    }
+    logf (LOG_DEBUG, "rset_default_forward exiting m=%d c=%d",more,cmp);
+
+    return more;
+}
+
 RSET_TERM *rset_terms(RSET rs, int *no)
 {
     *no = rs->no_rset_terms;
     return rs->rset_terms;
 }
 
-RSET_TERM rset_term_create (const char *name, int length, const char *flags)
+RSET_TERM rset_term_create (const char *name, int length, const char *flags,
+                            int type)
 {
     RSET_TERM t = (RSET_TERM) xmalloc (sizeof(*t));
     if (!name)
@@ -119,15 +122,19 @@ RSET_TERM rset_term_create (const char *name, int length, const char *flags)
        t->flags = NULL;
     else
        t->flags = xstrdup (flags);
-    t->nn = 1;
+    t->nn = -1;
+    t->count = 0;
+    t->type = type;
     return t;
 }
 
 void rset_term_destroy (RSET_TERM t)
 {
-    xfree (t->name);
-    xfree (t->flags);
-    xfree (t);
+    if (t) { /* rsmultior uses things without terms at all ! */
+        xfree (t->name);
+        xfree (t->flags);
+        xfree (t);
+    }
 }
 
 RSET_TERM rset_term_dup (RSET_TERM t)