* Sebastian Hammer, Adam Dickmeiss
*
* $Log: rsnull.c,v $
- * Revision 1.7 1995-12-11 09:15:25 adam
+ * 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.
#include <stdio.h>
#include <rsnull.h>
-#include <alexutil.h>
+#include <zebrautl.h>
-static void *r_create(const struct rset_control *sel, void *parms,
- int *flags);
+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);
+static int r_read (RSFD rfd, void *buf, int *term_index);
static int r_write (RSFD rfd, const void *buf);
-static int r_score (RSFD rfd, int *score);
-static const rset_control control =
+static const struct rset_control control =
{
"null",
r_create,
r_count,
r_read,
r_write,
- r_score
};
-const rset_control *rset_kind_null = &control;
+const struct rset_control *rset_kind_null = &control;
-static void *r_create(const struct rset_control *sel, void *parms,
- int *flags)
+static void *r_create(RSET ct, const struct rset_control *sel, void *parms)
{
+ 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;
}
static void r_delete (RSET ct)
{
+ rset_term_destroy (ct->rset_terms[0]);
+ xfree (ct->rset_terms);
}
static void r_rewind (RSFD rfd)
return 0;
}
-static int r_read (RSFD rfd, void *buf)
+static int r_read (RSFD rfd, void *buf, int *term_index)
{
+ *term_index = -1;
return 0;
}
return -1;
}
-static int r_score (RSFD rfd, int *score)
-{
- *score = -1;
- return -1;
-}
-