New method result set method rs_hits that returns the number of

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

diff --git a/rset/rsbool.c b/rset/rsbool.c
index d77d259..568a937 100644 (file)
--- a/rset/rsbool.c
+++ b/rset/rsbool.c
@@ -4,7 +4,28 @@
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: rsbool.c,v $
- * Revision 1.8  1995-10-12 12:41:55  adam
+ * Revision 1.13  1997-12-18 10:54:24  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 1.12  1997/10/31 12:37:01  adam
+ * Code calls xfree() instead of free().
+ *
+ * Revision 1.11  1997/09/09 13:38:15  adam
+ * Partial port to WIN95/NT.
+ *
+ * Revision 1.10  1996/10/29 13:55:20  adam
+ * Include of zebrautl.h instead of alexutil.h.
+ *
+ * Revision 1.9  1995/12/11 09:15:22  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 1.8  1995/10/12  12:41:55  adam
  * Private info (buf) moved from struct rset_control to struct rset.
  * Bug fixes in relevance.
  *
@@ -35,17 +56,21 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <assert.h>
 
 #include <rsbool.h>
-#include <alexutil.h>
+#include <zebrautl.h>
 
-static void *r_create(const struct rset_control *sel, void *parms);
+static void *r_create(const struct rset_control *sel, void *parms,
+                      int *flags);
 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_hits (RSET ct, void *oi);
 static int r_read_and (RSFD rfd, void *buf);
 static int r_read_or (RSFD rfd, void *buf);
 static int r_read_not (RSFD rfd, void *buf);
@@ -54,13 +79,14 @@ static int r_score (RSFD rfd, int *score);
 
 static const rset_control control_and = 
 {
-    "AND set type",
+    "and",
     r_create,
     r_open,
     r_close,
     r_delete,
     r_rewind,
     r_count,
+    r_hits,
     r_read_and,
     r_write,
     r_score
@@ -68,13 +94,14 @@ static const rset_control control_and =
 
 static const rset_control control_or = 
 {
-    "OR set type",
+    "or",
     r_create,
     r_open,
     r_close,
     r_delete,
     r_rewind,
     r_count,
+    r_hits,
     r_read_or,
     r_write,
     r_score
@@ -82,13 +109,14 @@ static const rset_control control_or =
 
 static const rset_control control_not = 
 {
-    "NOT set type",
+    "not",
     r_create,
     r_open,
     r_close,
     r_delete,
     r_rewind,
     r_count,
+    r_hits,
     r_read_not,
     r_write,
     r_score
@@ -118,15 +146,18 @@ struct rset_bool_rfd {
     struct rset_bool_info *info;
 };    
 
-static void *r_create (const struct rset_control *sel, void *parms)
+static void *r_create (const struct rset_control *sel, void *parms,
+                       int *flags)
 {
     rset_bool_parms *bool_parms = parms;
     struct rset_bool_info *info;
 
-    info = xmalloc (sizeof(struct rset_bool_info));
+    info = xmalloc (sizeof(*info));
     info->key_size = bool_parms->key_size;
     info->rset_l = bool_parms->rset_l;
     info->rset_r = bool_parms->rset_r;
+    if (rset_is_volatile(info->rset_l) || rset_is_volatile(info->rset_r))
+        *flags |= RSET_FLAG_VOLATILE;
     info->cmp = bool_parms->cmp;
     info->rfd_list = NULL;
     return info;
@@ -142,18 +173,17 @@ static RSFD r_open (RSET ct, int flag)
        logf (LOG_FATAL, "bool set type is read-only");
        return NULL;
     }
-    flag = 0;
     rfd = xmalloc (sizeof(*rfd));
     rfd->next = info->rfd_list;
     info->rfd_list = rfd;
+    rfd->info = info;
 
     rfd->buf_l = xmalloc (info->key_size);
     rfd->buf_r = xmalloc (info->key_size);
-    rfd->rfd_l = rset_open (info->rset_l, flag);
-    rfd->rfd_r = rset_open (info->rset_r, flag);
+    rfd->rfd_l = rset_open (info->rset_l, RSETF_READ|RSETF_SORT_SYSNO);
+    rfd->rfd_r = rset_open (info->rset_r, RSETF_READ|RSETF_SORT_SYSNO);
     rfd->more_l = rset_read (info->rset_l, rfd->rfd_l, rfd->buf_l);
     rfd->more_r = rset_read (info->rset_r, rfd->rfd_r, rfd->buf_r);
-    rfd->info = info;
     return rfd;
 }
 
@@ -170,7 +200,7 @@ static void r_close (RSFD rfd)
             rset_close (info->rset_l, (*rfdp)->rfd_l);
             rset_close (info->rset_r, (*rfdp)->rfd_r);
             *rfdp = (*rfdp)->next;
-            free (rfd);
+            xfree (rfd);
             return;
         }
     logf (LOG_FATAL, "r_close but no rfd match!");
@@ -182,6 +212,8 @@ static void r_delete (RSET ct)
     struct rset_bool_info *info = ct->buf;
 
     assert (info->rfd_list == NULL);
+    rset_delete (info->rset_l);
+    rset_delete (info->rset_r);
     xfree (info);
 }
 
@@ -202,6 +234,11 @@ static int r_count (RSET ct)
     return 0;
 }
 
+static int r_hits (RSET ct, void *oi)
+{
+    return -1;
+}
+
 static int r_read_and (RSFD rfd, void *buf)
 {
     struct rset_bool_rfd *p = rfd;