+++ /dev/null
-/* $Id: rsisam.c,v 1.26 2004-08-03 14:54:41 heikki Exp $
- Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002
- Index Data Aps
-
-This file is part of the Zebra server.
-
-Zebra is free software; you can redistribute it and/or modify it under
-the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
-version.
-
-Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-for more details.
-
-You should have received a copy of the GNU General Public License
-along with Zebra; see the file LICENSE.zebra. If not, write to the
-Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.
-*/
-
-
-#include <stdio.h>
-#include <assert.h>
-#include <zebrautl.h>
-#include <rsisam.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_read (RSFD rfd, void *buf, int *term_index);
-static int r_write (RSFD rfd, const void *buf);
-
-static const struct rset_control control =
-{
- "isam",
- r_create,
- r_open,
- r_close,
- r_delete,
- r_rewind,
- rset_default_forward,
- rset_default_pos,
- r_read,
- r_write,
-};
-
-const struct rset_control *rset_kind_isam = &control;
-
-struct rset_ispt_info {
- ISPT pt;
- struct rset_ispt_info *next;
- struct rset_isam_info *info;
-};
-
-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_isam_parms *pt = (rset_isam_parms *) parms;
- struct rset_isam_info *info;
-
- 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;
-}
-
-RSFD r_open (RSET ct, int flag)
-{
- 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 (RSFD rfd)
-{
- 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 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 (RSFD rfd)
-{
- logf (LOG_DEBUG, "rsisam_rewind");
- is_rewind( ((struct rset_ispt_info*) rfd)->pt);
-}
-
-/*
-static int r_count (RSET ct)
-{
- return 0;
-}
-*/
-
-static int r_read (RSFD rfd, void *buf, int *term_index)
-{
- *term_index = 0;
- return is_readkey( ((struct rset_ispt_info*) rfd)->pt, buf);
-}
-
-static int r_write (RSFD rfd, const void *buf)
-{
- logf (LOG_FATAL, "ISAM set type is read-only");
- return -1;
-}