/*
- * Copyright (C) 1994, Index Data I/S
+ * Copyright (C) 1994-1999, Index Data
* All rights reserved.
* Sebastian Hammer, Adam Dickmeiss
*
* $Log: rsisam.c,v $
- * Revision 1.1 1994-11-04 13:21:29 quinn
- * Working.
+ * Revision 1.21 1999-11-30 13:48:04 adam
+ * Improved installation. Updated for inclusion of YAZ header files.
+ *
+ * Revision 1.20 1999/05/26 07:49:14 adam
+ * C++ compilation.
+ *
+ * Revision 1.19 1999/02/02 14:51:34 adam
+ * Updated WIN32 code specific sections. Changed header.
+ *
+ * Revision 1.18 1998/03/05 08:36:28 adam
+ * New result set model.
+ *
+ * Revision 1.17 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 1.16 1997/10/31 12:37:01 adam
+ * Code calls xfree() instead of free().
+ *
+ * Revision 1.15 1996/10/29 13:55:22 adam
+ * Include of zebrautl.h instead of alexutil.h.
+ *
+ * Revision 1.14 1995/12/11 09:15:24 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 1.13 1995/10/12 12:41:56 adam
+ * Private info (buf) moved from struct rset_control to struct rset.
+ * Bug fixes in relevance.
+ *
+ * Revision 1.12 1995/10/10 14:00:04 adam
+ * Function rset_open changed its wflag parameter to general flags.
+ *
+ * Revision 1.11 1995/10/06 14:38:05 adam
+ * New result set method: r_score.
+ * Local no (sysno) and score is transferred to retrieveCtrl.
+ *
+ * Revision 1.10 1995/09/08 14:52:42 adam
+ * Work on relevance feedback.
+ *
+ * Revision 1.9 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 1.8 1995/09/06 16:11:56 adam
+ * More work on boolean sets.
+ *
+ * Revision 1.7 1995/09/06 10:35:44 adam
+ * Null set implemented.
+ *
+ * Revision 1.6 1995/09/05 11:43:24 adam
+ * Complete version of temporary sets. Not tested yet though.
+ *
+ * Revision 1.5 1995/09/04 12:33:56 adam
+ * Various cleanup. YAZ util used instead.
+ *
+ * Revision 1.4 1995/09/04 09:10:55 adam
+ * Minor changes.
+ *
+ * Revision 1.3 1994/11/22 13:15:37 quinn
+ * Simple
+ *
+ * Revision 1.2 1994/11/04 14:53:12 quinn
+ * Work
*
*/
+#include <stdio.h>
+#include <assert.h>
+#include <zebrautl.h>
+#if ZMBOL
+#include <rsisam.h>
-/* TODO: Memory management */
+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);
-#include <rsisam.h>
-#include <util.h>
-
-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();
-static int r_write();
-
-static const rset_control control =
+static const struct rset_control control =
{
- "ISAM set type",
- 0,
+ "isam",
r_create,
r_open,
r_close,
r_rewind,
r_count,
r_read,
- r_write
+ r_write,
};
-const rset_control *rset_kind_isam = &control;
+const struct rset_control *rset_kind_isam = &control;
+
+struct rset_ispt_info {
+ ISPT pt;
+ struct rset_ispt_info *next;
+ struct rset_isam_info *info;
+};
-rset_control *r_create(const struct rset_control *sel, void *parms)
+struct rset_isam_info {
+ ISAM is;
+ ISAM_P pos;
+ struct rset_ispt_info *ispt_list;
+};
+
+static void *r_create(RSET ct, const struct rset_control *sel, void *parms)
{
- rset_control *newct;
- rset_isam_parms *pt = parms;
+ rset_isam_parms *pt = (rset_isam_parms *) parms;
+ struct rset_isam_info *info;
- newct = xmalloc(sizeof(*newct));
- if (!(newct->buf = (char*) is_position(pt->is, pt->pos)))
- return 0;
- return newct;
+ ct->flags |= RSET_FLAG_VOLATILE;
+ info = (struct rset_isam_info *) xmalloc (sizeof(struct rset_isam_info));
+ info->is = pt->is;
+ info->pos = pt->pos;
+ info->ispt_list = NULL;
+
+ ct->no_rset_terms = 1;
+ ct->rset_terms = (RSET_TERM *) xmalloc (sizeof(*ct->rset_terms));
+ ct->rset_terms[0] = pt->rset_term;
+ return info;
}
-static int r_open(rset_control *ct, int wflag)
+RSFD r_open (RSET ct, int flag)
{
- r_rewind(ct);
- return 0;
+ struct rset_isam_info *info = (struct rset_isam_info *) ct->buf;
+ struct rset_ispt_info *ptinfo;
+
+ logf (LOG_DEBUG, "risam_open");
+ if (flag & RSETF_WRITE)
+ {
+ logf (LOG_FATAL, "ISAM set type is read-only");
+ return NULL;
+ }
+ ptinfo = (struct rset_ispt_info *) xmalloc (sizeof(*ptinfo));
+ ptinfo->next = info->ispt_list;
+ info->ispt_list = ptinfo;
+ ptinfo->pt = is_position (info->is, info->pos);
+ ptinfo->info = info;
+
+ if (ct->rset_terms[0]->nn < 0)
+ ct->rset_terms[0]->nn = is_numkeys (ptinfo->pt);
+ return ptinfo;
}
-static void r_close(rset_control *ct)
+static void r_close (RSFD rfd)
{
- /* NOP */
+ struct rset_isam_info *info = ((struct rset_ispt_info*) rfd)->info;
+ struct rset_ispt_info **ptinfop;
+
+ for (ptinfop = &info->ispt_list; *ptinfop; ptinfop = &(*ptinfop)->next)
+ if (*ptinfop == rfd)
+ {
+ is_pt_free ((*ptinfop)->pt);
+ *ptinfop = (*ptinfop)->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)
{
- is_pt_free((ISPT) ct->buf);
- xfree(ct);
+ struct rset_isam_info *info = (struct rset_isam_info *) ct->buf;
+
+ logf (LOG_DEBUG, "rsisam_delete");
+ assert (info->ispt_list == NULL);
+ rset_term_destroy (ct->rset_terms[0]);
+ xfree (ct->rset_terms);
+ xfree (info);
}
-static void r_rewind(rset_control *ct)
-{
- is_rewind((ISPT) ct->buf);
+static void r_rewind (RSFD rfd)
+{
+ logf (LOG_DEBUG, "rsisam_rewind");
+ is_rewind( ((struct rset_ispt_info*) rfd)->pt);
}
-static int r_count(rset_control *ct)
-{return 0;}
+static int r_count (RSET ct)
+{
+ return 0;
+}
-static int r_read(rset_control *ct, void *buf)
+static int r_read (RSFD rfd, void *buf, int *term_index)
{
- return is_readkey((ISPT) ct->buf, buf);
+ *term_index = 0;
+ return is_readkey( ((struct rset_ispt_info*) rfd)->pt, buf);
}
-static int r_write(rset_control *ct, const void *buf)
+static int r_write (RSFD rfd, const void *buf)
{
- log(LOG_FATAL, "ISAM set type is read-only");
+ logf (LOG_FATAL, "ISAM set type is read-only");
return -1;
}
+#endif
projects / idzebra-moved-to-github.git / blobdiff