-/*
- * Copyright (C) 1994-1999, Index Data
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: rsnull.c,v $
- * Revision 1.11 1999-02-02 14:51:36 adam
- * Updated WIN32 code specific sections. Changed header.
- *
- * Revision 1.10 1998/03/05 08:36:28 adam
- * New result set model.
- *
- * Revision 1.9 1997/12/18 10:54:25 adam
- * New method result set method rs_hits that returns the number of
- * hits in result-set (if known). The ranked result set returns real
- * number of hits but only when not combined with other operands.
- *
- * Revision 1.8 1996/10/29 13:55:24 adam
- * Include of zebrautl.h instead of alexutil.h.
- *
- * Revision 1.7 1995/12/11 09:15:25 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 1.6 1995/10/12 12:41:57 adam
- * Private info (buf) moved from struct rset_control to struct rset.
- * Bug fixes in relevance.
- *
- * Revision 1.5 1995/10/10 14:00:04 adam
- * Function rset_open changed its wflag parameter to general flags.
- *
- * Revision 1.4 1995/10/06 14:38:06 adam
- * New result set method: r_score.
- * Local no (sysno) and score is transferred to retrieveCtrl.
- *
- * Revision 1.3 1995/09/08 14:52:42 adam
- * Work on relevance feedback.
- *
- * Revision 1.2 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 1.1 1995/09/06 10:35:44 adam
- * Null set implemented.
- *
- */
+/* This file is part of the Zebra server.
+ Copyright (C) Index Data
+
+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 this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <stdio.h>
-#include <rsnull.h>
-#include <zebrautl.h>
+#include <assert.h>
+#include <idzebra/util.h>
+#include <rset.h>
-static void *r_create(RSET ct, const struct rset_control *sel, void *parms);
-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_count (RSET ct);
-static int r_read (RSFD rfd, void *buf, int *term_index);
-static int r_write (RSFD rfd, const void *buf);
+static RSFD r_open(RSET ct, int flag);
+static void r_close(RSFD rfd);
+static void r_delete(RSET ct);
+static void r_pos(RSFD rfd, double *current, double *total);
+static int r_read(RSFD rfd, void *buf, TERMID *term);
-static const struct rset_control control =
+static const struct rset_control control =
{
"null",
- r_create,
+ r_delete,
+ rset_get_one_term,
r_open,
r_close,
- r_delete,
- r_rewind,
- r_count,
+ 0, /* no forward */
+ r_pos,
r_read,
- r_write,
+ rset_no_write,
};
-const struct rset_control *rset_kind_null = &control;
-
-static void *r_create(RSET ct, const struct rset_control *sel, void *parms)
+RSET rset_create_null(NMEM nmem, struct rset_key_control *kcontrol,
+ TERMID term)
{
- rset_null_parms *null_parms = parms;
-
- ct->no_rset_terms = 1;
- ct->rset_terms = xmalloc (sizeof(*ct->rset_terms));
- if (parms)
- ct->rset_terms[0] = null_parms->rset_term;
- else
- ct->rset_terms[0] = rset_term_create ("term", -1, "rank-0");
- ct->rset_terms[0]->nn = 0;
-
- return NULL;
+ RSET rnew = rset_create_base(&control, nmem, kcontrol, 0, term, 0, 0);
+ rnew->priv = 0;
+ return rnew;
}
-static RSFD r_open (RSET ct, int flag)
+static RSFD r_open(RSET ct, int flag)
{
+ RSFD rfd;
if (flag & RSETF_WRITE)
{
- logf (LOG_FATAL, "NULL set type is read-only");
- return NULL;
+ yaz_log (YLOG_FATAL, "NULL set type is read-only");
+ return NULL;
}
- return "";
+ rfd = rfd_create_base(ct);
+ rfd->priv = 0;
+ return rfd;
}
-static void r_close (RSFD rfd)
+static void r_close(RSFD rfd)
{
}
-static void r_delete (RSET ct)
+static void r_delete(RSET ct)
{
- rset_term_destroy (ct->rset_terms[0]);
- xfree (ct->rset_terms);
}
-static void r_rewind (RSFD rfd)
+static void r_pos(RSFD rfd, double *current, double *total)
{
- logf (LOG_DEBUG, "rsnull_rewind");
-}
-
-static int r_count (RSET ct)
-{
- return 0;
+ assert(rfd);
+ assert(current);
+ assert(total);
+ *total = 0;
+ *current = 0;
}
-static int r_read (RSFD rfd, void *buf, int *term_index)
+static int r_read(RSFD rfd, void *buf, TERMID *term)
{
- *term_index = -1;
+ if (term)
+ *term = 0;
return 0;
}
-static int r_write (RSFD rfd, const void *buf)
-{
- logf (LOG_FATAL, "NULL set type is read-only");
- return -1;
-}
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * c-file-style: "Stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
projects / idzebra-moved-to-github.git / blobdiff