1 /* $Id: rsisamb.c,v 1.10.2.1 2004-12-17 13:43:10 heikki Exp $
2 Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004
5 This file is part of the Zebra server.
7 Zebra is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with Zebra; see the file LICENSE.zebra. If not, write to the
19 Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
28 #include <../index/index.h> /* for log_keydump. Debugging only */
34 static void *r_create(RSET ct, const struct rset_control *sel, void *parms);
35 static RSFD r_open (RSET ct, int flag);
36 static void r_close (RSFD rfd);
37 static void r_delete (RSET ct);
38 static void r_rewind (RSFD rfd);
39 static int r_forward(RSET ct, RSFD rfd, void *buf, int *term_index,
40 int (*cmpfunc)(const void *p1, const void *p2),
41 const void *untilbuf);
42 static void r_pos (RSFD rfd, int *current, int *total);
43 static int r_read (RSFD rfd, void *buf, int *term_index);
44 static int r_write (RSFD rfd, const void *buf);
46 static const struct rset_control control =
54 r_forward, /* rset_default_forward, */
60 /* FIXME - using the default forward reads all items from the isam */
61 /* and thus makes the term counts work OK. On the other hand, it */
62 /* negates the speedup from forwarding */
64 const struct rset_control *rset_kind_isamb = &control;
68 struct rset_pp_info *next;
69 struct rset_isamb_info *info;
74 struct rset_isamb_info {
78 int (*cmp)(const void *p1, const void *p2);
79 struct rset_pp_info *ispt_list;
82 static void *r_create(RSET ct, const struct rset_control *sel, void *parms)
84 rset_isamb_parms *pt = (rset_isamb_parms *) parms;
85 struct rset_isamb_info *info;
87 ct->flags |= RSET_FLAG_VOLATILE;
88 info = (struct rset_isamb_info *) xmalloc (sizeof(*info));
91 info->key_size = pt->key_size;
93 info->ispt_list = NULL;
94 ct->no_rset_terms = 1;
95 ct->rset_terms = (RSET_TERM *) xmalloc (sizeof(*ct->rset_terms));
96 ct->rset_terms[0] = pt->rset_term;
100 RSFD r_open (RSET ct, int flag)
102 struct rset_isamb_info *info = (struct rset_isamb_info *) ct->buf;
103 struct rset_pp_info *ptinfo;
105 logf (LOG_DEBUG, "risamb_open");
106 if (flag & RSETF_WRITE)
108 logf (LOG_FATAL, "ISAMB set type is read-only");
111 ptinfo = (struct rset_pp_info *) xmalloc (sizeof(*ptinfo));
112 ptinfo->next = info->ispt_list;
113 info->ispt_list = ptinfo;
114 ptinfo->pt = isamb_pp_open (info->is, info->pos);
116 if (ct->rset_terms[0]->nn < 0)
117 ct->rset_terms[0]->nn = isamb_pp_num (ptinfo->pt);
118 ct->rset_terms[0]->count = 0;
119 ptinfo->countp = &ct->rset_terms[0]->count;
120 ptinfo->buf = xmalloc (info->key_size);
124 static void r_close (RSFD rfd)
126 struct rset_isamb_info *info = ((struct rset_pp_info*) rfd)->info;
127 struct rset_pp_info **ptinfop;
129 for (ptinfop = &info->ispt_list; *ptinfop; ptinfop = &(*ptinfop)->next)
132 xfree ((*ptinfop)->buf);
133 isamb_pp_close ((*ptinfop)->pt);
134 *ptinfop = (*ptinfop)->next;
138 logf (LOG_FATAL, "r_close but no rfd match!");
142 static void r_delete (RSET ct)
144 struct rset_isamb_info *info = (struct rset_isamb_info *) ct->buf;
146 logf (LOG_DEBUG, "rsisamb_delete");
147 assert (info->ispt_list == NULL);
148 rset_term_destroy (ct->rset_terms[0]);
149 xfree (ct->rset_terms);
153 static void r_rewind (RSFD rfd)
155 logf (LOG_DEBUG, "rsisamb_rewind");
159 static int r_forward(RSET ct, RSFD rfd, void *buf, int *term_index,
160 int (*cmpfunc)(const void *p1, const void *p2),
161 const void *untilbuf)
164 struct rset_pp_info *pinfo = (struct rset_pp_info *) rfd;
166 logf (LOG_DEBUG, "rset_rsisamb_forward starting '%s' (ct=%p rfd=%p)",
167 ct->control->desc, ct,rfd);
168 key_logdump(LOG_DEBUG, untilbuf);
169 key_logdump(LOG_DEBUG, buf);
172 i=isamb_pp_forward(pinfo->pt, buf, untilbuf);
174 logf (LOG_DEBUG, "rset_rsisamb_forward returning %d",i);
179 static void r_pos (RSFD rfd, int *current, int *total)
181 struct rset_pp_info *pinfo = (struct rset_pp_info *) rfd;
183 isamb_pp_pos(pinfo->pt, current, total);
186 static int r_read (RSFD rfd, void *buf, int *term_index)
188 struct rset_pp_info *pinfo = (struct rset_pp_info *) rfd;
191 r = isamb_pp_read(pinfo->pt, buf);
194 if (*pinfo->countp == 0 || (*pinfo->info->cmp)(buf, pinfo->buf) > 1)
196 memcpy (pinfo->buf, buf, pinfo->info->key_size);
203 static int r_write (RSFD rfd, const void *buf)
205 logf (LOG_FATAL, "ISAMB set type is read-only");