2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.13 1995-10-12 12:41:56 adam
8 * Private info (buf) moved from struct rset_control to struct rset.
9 * Bug fixes in relevance.
11 * Revision 1.12 1995/10/10 14:00:04 adam
12 * Function rset_open changed its wflag parameter to general flags.
14 * Revision 1.11 1995/10/06 14:38:05 adam
15 * New result set method: r_score.
16 * Local no (sysno) and score is transferred to retrieveCtrl.
18 * Revision 1.10 1995/09/08 14:52:42 adam
19 * Work on relevance feedback.
21 * Revision 1.9 1995/09/07 13:58:43 adam
22 * New parameter: result-set file descriptor (RSFD) to support multiple
23 * positions within the same result-set.
24 * Boolean operators: and, or, not implemented.
26 * Revision 1.8 1995/09/06 16:11:56 adam
27 * More work on boolean sets.
29 * Revision 1.7 1995/09/06 10:35:44 adam
30 * Null set implemented.
32 * Revision 1.6 1995/09/05 11:43:24 adam
33 * Complete version of temporary sets. Not tested yet though.
35 * Revision 1.5 1995/09/04 12:33:56 adam
36 * Various cleanup. YAZ util used instead.
38 * Revision 1.4 1995/09/04 09:10:55 adam
41 * Revision 1.3 1994/11/22 13:15:37 quinn
44 * Revision 1.2 1994/11/04 14:53:12 quinn
54 static void *r_create(const struct rset_control *sel, void *parms);
55 static RSFD r_open (RSET ct, int flag);
56 static void r_close (RSFD rfd);
57 static void r_delete (RSET ct);
58 static void r_rewind (RSFD rfd);
59 static int r_count (RSET ct);
60 static int r_read (RSFD rfd, void *buf);
61 static int r_write (RSFD rfd, const void *buf);
62 static int r_score (RSFD rfd, int *score);
64 static const rset_control control =
78 const rset_control *rset_kind_isam = &control;
80 struct rset_ispt_info {
82 struct rset_ispt_info *next;
83 struct rset_isam_info *info;
86 struct rset_isam_info {
89 struct rset_ispt_info *ispt_list;
92 static void *r_create(const struct rset_control *sel, void *parms)
94 rset_isam_parms *pt = parms;
95 struct rset_isam_info *info;
97 info = xmalloc (sizeof(struct rset_isam_info));
100 info->ispt_list = NULL;
104 RSFD r_open (RSET ct, int flag)
106 struct rset_isam_info *info = ct->buf;
107 struct rset_ispt_info *ptinfo;
109 logf (LOG_DEBUG, "risam_open");
110 if (flag & RSETF_WRITE)
112 logf (LOG_FATAL, "ISAM set type is read-only");
115 ptinfo = xmalloc (sizeof(*ptinfo));
116 ptinfo->next = info->ispt_list;
117 info->ispt_list = ptinfo;
118 ptinfo->pt = is_position (info->is, info->pos);
123 static void r_close (RSFD rfd)
125 struct rset_isam_info *info = ((struct rset_ispt_info*) rfd)->info;
126 struct rset_ispt_info **ptinfop;
128 for (ptinfop = &info->ispt_list; *ptinfop; ptinfop = &(*ptinfop)->next)
131 is_pt_free ((*ptinfop)->pt);
132 *ptinfop = (*ptinfop)->next;
136 logf (LOG_FATAL, "r_close but no rfd match!");
140 static void r_delete (RSET ct)
142 struct rset_isam_info *info = ct->buf;
144 logf (LOG_DEBUG, "rsisam_delete");
145 assert (info->ispt_list == NULL);
149 static void r_rewind (RSFD rfd)
151 logf (LOG_DEBUG, "rsisam_rewind");
152 is_rewind( ((struct rset_ispt_info*) rfd)->pt);
155 static int r_count (RSET ct)
160 static int r_read (RSFD rfd, void *buf)
162 return is_readkey( ((struct rset_ispt_info*) rfd)->pt, buf);
165 static int r_write (RSFD rfd, const void *buf)
167 logf (LOG_FATAL, "ISAM set type is read-only");
171 static int r_score (RSFD rfd, int *score)