/*
- * Copyright (C) 1994-1995, Index Data I/S
+ * Copyright (C) 1994-1999, Index Data
* All rights reserved.
* Sebastian Hammer, Adam Dickmeiss
*
* $Log: rsbool.c,v $
- * Revision 1.2 1995-09-06 16:11:55 adam
+ * Revision 1.16 1999-05-26 07:49:14 adam
+ * C++ compilation.
+ *
+ * Revision 1.15 1999/02/02 14:51:32 adam
+ * Updated WIN32 code specific sections. Changed header.
+ *
+ * Revision 1.14 1998/03/05 08:36:27 adam
+ * New result set model.
+ *
+ * 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.
+ *
+ * Revision 1.7 1995/10/10 14:00:03 adam
+ * Function rset_open changed its wflag parameter to general flags.
+ *
+ * Revision 1.6 1995/10/06 14:38:05 adam
+ * New result set method: r_score.
+ * Local no (sysno) and score is transferred to retrieveCtrl.
+ *
+ * Revision 1.5 1995/09/08 14:52:41 adam
+ * Work on relevance feedback.
+ *
+ * Revision 1.4 1995/09/08 08:54:04 adam
+ * More efficient and operation.
+ *
+ * Revision 1.3 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 1.2 1995/09/06 16:11:55 adam
* More work on boolean sets.
*
* Revision 1.1 1995/09/06 13:27:15 adam
*/
#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
#include <rsbool.h>
-#include <alexutil.h>
-
-static rset_control *r_create(const struct rset_control *sel, void *parms);
-static int r_open (rset_control *ct, int wflag);
-static void r_close (rset_control *ct);
-static void r_delete (rset_control *ct);
-static void r_rewind (rset_control *ct);
-static int r_count (rset_control *ct);
-static int r_read (rset_control *ct, void *buf);
-static int r_write (rset_control *ct, const void *buf);
-
-static const rset_control control =
+#include <zebrautl.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_and (RSFD rfd, void *buf, int *term_index);
+static int r_read_or (RSFD rfd, void *buf, int *term_index);
+static int r_read_not (RSFD rfd, void *buf, int *term_index);
+static int r_write (RSFD rfd, const void *buf);
+
+static const struct rset_control control_and =
+{
+ "and",
+ r_create,
+ r_open,
+ r_close,
+ r_delete,
+ r_rewind,
+ r_count,
+ r_read_and,
+ r_write,
+};
+
+static const struct rset_control control_or =
+{
+ "or",
+ r_create,
+ r_open,
+ r_close,
+ r_delete,
+ r_rewind,
+ r_count,
+ r_read_or,
+ r_write,
+};
+
+static const struct rset_control control_not =
{
- "BOOL set type",
- 0,
+ "not",
r_create,
r_open,
r_close,
r_delete,
r_rewind,
r_count,
- r_read,
- r_write
+ r_read_not,
+ r_write,
};
-const rset_control *rset_kind_bool = &control;
+
+const struct rset_control *rset_kind_and = &control_and;
+const struct rset_control *rset_kind_or = &control_or;
+const struct rset_control *rset_kind_not = &control_not;
struct rset_bool_info {
int key_size;
- int op;
RSET rset_l;
RSET rset_r;
- int more_l;
- int more_r;
- void *buf_l;
- void *buf_r;
+ int term_index_s;
int (*cmp)(const void *p1, const void *p2);
+ struct rset_bool_rfd *rfd_list;
};
-static rset_control *r_create(const struct rset_control *sel, void *parms)
+struct rset_bool_rfd {
+ RSFD rfd_l;
+ RSFD rfd_r;
+ int more_l;
+ int more_r;
+ int term_index_l;
+ int term_index_r;
+ void *buf_l;
+ void *buf_r;
+ struct rset_bool_rfd *next;
+ struct rset_bool_info *info;
+};
+
+static void *r_create (RSET ct, const struct rset_control *sel, void *parms)
{
- rset_control *newct;
- rset_bool_parms *bool_parms = parms;
+ rset_bool_parms *bool_parms = (rset_bool_parms *) parms;
struct rset_bool_info *info;
- logf (LOG_DEBUG, "rsbool_create(%s)", sel->desc);
- newct = xmalloc(sizeof(*newct));
- memcpy (newct, sel, sizeof(*sel));
- newct->buf = xmalloc (sizeof(struct rset_bool_info));
- info = (struct rset_bool_info*) newct->buf;
+ info = (struct rset_bool_info *) xmalloc (sizeof(*info));
info->key_size = bool_parms->key_size;
- info->op = bool_parms->op;
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))
+ ct->flags |= RSET_FLAG_VOLATILE;
info->cmp = bool_parms->cmp;
- info->buf_l = xmalloc (info->key_size);
- info->buf_r = xmalloc (info->key_size);
- return newct;
+ 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_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;
}
-static int r_open(rset_control *ct, int wflag)
+static RSFD r_open (RSET ct, int flag)
{
- struct rset_bool_info *info = ct->buf;
+ struct rset_bool_info *info = (struct rset_bool_info *) ct->buf;
+ struct rset_bool_rfd *rfd;
- if (wflag)
+ if (flag & RSETF_WRITE)
{
logf (LOG_FATAL, "bool set type is read-only");
- return -1;
+ return NULL;
}
- rset_open (info->rset_l, wflag);
- rset_open (info->rset_r, wflag);
- info->more_l = rset_read (info->rset_l, info->buf_l);
- info->more_r = rset_read (info->rset_r, info->buf_r);
- return 0;
+ rfd = (struct rset_bool_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, 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->more_r = rset_read (info->rset_r, rfd->rfd_r, rfd->buf_r,
+ &rfd->term_index_r);
+ return rfd;
}
-static void r_close(rset_control *ct)
+static void r_close (RSFD rfd)
{
- struct rset_bool_info *info = ct->buf;
-
- rset_close (info->rset_l);
- rset_close (info->rset_r);
+ struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
+ struct rset_bool_rfd **rfdp;
+
+ for (rfdp = &info->rfd_list; *rfdp; rfdp = &(*rfdp)->next)
+ if (*rfdp == rfd)
+ {
+ xfree ((*rfdp)->buf_l);
+ xfree ((*rfdp)->buf_r);
+ rset_close (info->rset_l, (*rfdp)->rfd_l);
+ rset_close (info->rset_r, (*rfdp)->rfd_r);
+ *rfdp = (*rfdp)->next;
+ xfree (rfd);
+ return;
+ }
+ logf (LOG_FATAL, "r_close but no rfd match!");
+ assert (0);
}
-static void r_delete(rset_control *ct)
+static void r_delete (RSET ct)
{
- struct rset_bool_info *info = ct->buf;
+ struct rset_bool_info *info = (struct rset_bool_info *) ct->buf;
+ assert (info->rfd_list == NULL);
+ xfree (ct->rset_terms);
rset_delete (info->rset_l);
rset_delete (info->rset_r);
- xfree (info->buf_l);
- xfree (info->buf_r);
- xfree (ct->buf);
- xfree (ct);
+ xfree (info);
}
-static void r_rewind(rset_control *ct)
+static void r_rewind (RSFD rfd)
{
- struct rset_bool_info *info = ct->buf;
+ struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
+ struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
logf (LOG_DEBUG, "rsbool_rewind");
- rset_rewind (info->rset_l);
- rset_rewind (info->rset_r);
+ rset_rewind (info->rset_l, p->rfd_l);
+ 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_r = rset_read (info->rset_r, p->rfd_r, p->buf_r, &p->term_index_r);
+}
+
+static int r_count (RSET ct)
+{
+ return 0;
+}
+
+static int r_read_and (RSFD rfd, void *buf, int *term_index)
+{
+ struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
+ struct rset_bool_info *info = p->info;
+
+ while (p->more_l && p->more_r)
+ {
+ int cmp;
+
+ cmp = (*info->cmp)(p->buf_l, p->buf_r);
+ if (!cmp)
+ {
+ memcpy (buf, p->buf_l, info->key_size);
+ *term_index = p->term_index_l;
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ return 1;
+ }
+ else if (cmp == 1)
+ {
+ memcpy (buf, p->buf_r, info->key_size);
+
+ *term_index = p->term_index_r + info->term_index_s;
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ return 1;
+ }
+ else if (cmp == -1)
+ {
+ memcpy (buf, p->buf_l, info->key_size);
+ *term_index = p->term_index_l;
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ return 1;
+ }
+ else if (cmp > 1)
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ else
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ }
+ return 0;
}
-static int r_count (rset_control *ct)
+static int r_read_or (RSFD rfd, void *buf, int *term_index)
{
+ struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
+ struct rset_bool_info *info = p->info;
+
+ while (p->more_l || p->more_r)
+ {
+ int cmp;
+
+ if (p->more_l && p->more_r)
+ cmp = (*info->cmp)(p->buf_l, p->buf_r);
+ else if (p->more_r)
+ cmp = 2;
+ else
+ cmp = -2;
+ if (!cmp)
+ {
+ memcpy (buf, p->buf_l, info->key_size);
+ *term_index = p->term_index_l;
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ return 1;
+ }
+ else if (cmp > 0)
+ {
+ memcpy (buf, p->buf_r, info->key_size);
+ *term_index = p->term_index_r + info->term_index_s;
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ return 1;
+ }
+ else
+ {
+ memcpy (buf, p->buf_l, info->key_size);
+ *term_index = p->term_index_l;
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ return 1;
+ }
+ }
return 0;
}
-static int r_read (rset_control *ct, void *buf)
+static int r_read_not (RSFD rfd, void *buf, int *term_index)
{
- struct rset_bool_info *info = ct->buf;
+ struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
+ struct rset_bool_info *info = p->info;
+
+ while (p->more_l || p->more_r)
+ {
+ int cmp;
- if (!info->more_l && !info->more_r)
- return 0;
+ if (p->more_l && p->more_r)
+ cmp = (*info->cmp)(p->buf_l, p->buf_r);
+ else if (p->more_r)
+ cmp = 2;
+ else
+ cmp = -2;
+ if (cmp < -1)
+ {
+ memcpy (buf, p->buf_l, info->key_size);
+ *term_index = p->term_index_l;
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ return 1;
+ }
+ else if (cmp > 1)
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ else
+ {
+ memcpy (buf, p->buf_l, info->key_size);
+ do
+ {
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ if (!p->more_l)
+ break;
+ cmp = (*info->cmp)(p->buf_l, buf);
+ } while (cmp >= -1 && cmp <= 1);
+ do
+ {
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ if (!p->more_r)
+ break;
+ cmp = (*info->cmp)(p->buf_r, buf);
+ } while (cmp >= -1 && cmp <= 1);
+ }
+ }
return 0;
}
-static int r_write (rset_control *ct, const void *buf)
+
+static int r_write (RSFD rfd, const void *buf)
{
logf (LOG_FATAL, "bool set type is read-only");
return -1;
}
+
projects / idzebra-moved-to-github.git / blobdiff