-/*
- * Copyright (C) 1994, Index Data I/S
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: rsisam.c,v $
- * Revision 1.1 1994-11-04 13:21:29 quinn
- * Working.
- *
- */
-
-/* TODO: Memory management */
+/* $Id: rsisam.c,v 1.23 2002-08-02 19:26:57 adam 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>
-#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 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);
+
+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;
+};
+
+struct rset_isam_info {
+ ISAM is;
+ ISAM_P pos;
+ struct rset_ispt_info *ispt_list;
+};
-rset_control *r_create(const struct rset_control *sel, void *parms)
+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;
}
projects / idzebra-moved-to-github.git / blobdiff