-/*
- * Copyright (C) 1994-1995, Index Data I/S
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: rsbool.c,v $
- * Revision 1.2 1995-09-06 16:11:55 adam
- * More work on boolean sets.
- *
- * Revision 1.1 1995/09/06 13:27:15 adam
- * New set type: bool. Not finished yet.
- *
- */
+/* $Id: rsbool.c,v 1.19 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 <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
#include <rsbool.h>
-#include <alexutil.h>
-
-static 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 (rset_control *ct, void *buf);
-static int r_write (rset_control *ct, const void *buf);
-
-static const rset_control control =
+#include <zebrautl.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_count (RSET ct);
+static int r_read_and (RSFD rfd, void *buf, int *term_index);
+static int r_read_or (RSFD rfd, void *buf, int *term_index);
+static int r_read_not (RSFD rfd, void *buf, int *term_index);
+static int r_write (RSFD rfd, const void *buf);
+
+static const struct rset_control control_and =
+{
+ "and",
+ r_create,
+ r_open,
+ r_close,
+ r_delete,
+ r_rewind,
+ r_count,
+ r_read_and,
+ r_write,
+};
+
+static const struct rset_control control_or =
{
- "BOOL set type",
- 0,
+ "or",
r_create,
r_open,
r_close,
r_delete,
r_rewind,
r_count,
- r_read,
- r_write
+ r_read_or,
+ r_write,
+};
+
+static const struct rset_control control_not =
+{
+ "not",
+ r_create,
+ r_open,
+ r_close,
+ r_delete,
+ r_rewind,
+ r_count,
+ r_read_not,
+ r_write,
};
-const rset_control *rset_kind_bool = &control;
+
+const struct rset_control *rset_kind_and = &control_and;
+const struct rset_control *rset_kind_or = &control_or;
+const struct rset_control *rset_kind_not = &control_not;
struct rset_bool_info {
int key_size;
- int op;
RSET rset_l;
RSET rset_r;
- int more_l;
- int more_r;
- void *buf_l;
- void *buf_r;
+ int term_index_s;
int (*cmp)(const void *p1, const void *p2);
+ struct rset_bool_rfd *rfd_list;
};
-static rset_control *r_create(const struct rset_control *sel, void *parms)
+struct rset_bool_rfd {
+ RSFD rfd_l;
+ RSFD rfd_r;
+ int more_l;
+ int more_r;
+ int term_index_l;
+ int term_index_r;
+ void *buf_l;
+ void *buf_r;
+ struct rset_bool_rfd *next;
+ struct rset_bool_info *info;
+};
+
+static void *r_create (RSET ct, const struct rset_control *sel, void *parms)
{
- rset_control *newct;
- rset_bool_parms *bool_parms = parms;
+ rset_bool_parms *bool_parms = (rset_bool_parms *) parms;
struct rset_bool_info *info;
- logf (LOG_DEBUG, "rsbool_create(%s)", sel->desc);
- newct = xmalloc(sizeof(*newct));
- memcpy (newct, sel, sizeof(*sel));
- newct->buf = xmalloc (sizeof(struct rset_bool_info));
- info = (struct rset_bool_info*) newct->buf;
+ info = (struct rset_bool_info *) xmalloc (sizeof(*info));
info->key_size = bool_parms->key_size;
- info->op = bool_parms->op;
info->rset_l = bool_parms->rset_l;
info->rset_r = bool_parms->rset_r;
+ if (rset_is_volatile(info->rset_l) || rset_is_volatile(info->rset_r))
+ ct->flags |= RSET_FLAG_VOLATILE;
info->cmp = bool_parms->cmp;
- info->buf_l = xmalloc (info->key_size);
- info->buf_r = xmalloc (info->key_size);
- return newct;
+ info->rfd_list = NULL;
+
+ info->term_index_s = info->rset_l->no_rset_terms;
+ ct->no_rset_terms =
+ info->rset_l->no_rset_terms + info->rset_r->no_rset_terms;
+ ct->rset_terms = (RSET_TERM *)
+ xmalloc (sizeof (*ct->rset_terms) * ct->no_rset_terms);
+
+ memcpy (ct->rset_terms, info->rset_l->rset_terms,
+ info->rset_l->no_rset_terms * sizeof(*ct->rset_terms));
+ memcpy (ct->rset_terms + info->rset_l->no_rset_terms,
+ info->rset_r->rset_terms,
+ info->rset_r->no_rset_terms * sizeof(*ct->rset_terms));
+ return info;
}
-static int r_open(rset_control *ct, int wflag)
+static RSFD r_open (RSET ct, int flag)
{
- struct rset_bool_info *info = ct->buf;
+ struct rset_bool_info *info = (struct rset_bool_info *) ct->buf;
+ struct rset_bool_rfd *rfd;
- if (wflag)
+ if (flag & RSETF_WRITE)
{
logf (LOG_FATAL, "bool set type is read-only");
- return -1;
+ return NULL;
}
- rset_open (info->rset_l, wflag);
- rset_open (info->rset_r, wflag);
- info->more_l = rset_read (info->rset_l, info->buf_l);
- info->more_r = rset_read (info->rset_r, info->buf_r);
- return 0;
+ rfd = (struct rset_bool_rfd *) xmalloc (sizeof(*rfd));
+ rfd->next = info->rfd_list;
+ info->rfd_list = rfd;
+ rfd->info = info;
+
+ rfd->buf_l = xmalloc (info->key_size);
+ rfd->buf_r = xmalloc (info->key_size);
+ rfd->rfd_l = rset_open (info->rset_l, RSETF_READ);
+ rfd->rfd_r = rset_open (info->rset_r, RSETF_READ);
+ rfd->more_l = rset_read (info->rset_l, rfd->rfd_l, rfd->buf_l,
+ &rfd->term_index_l);
+ rfd->more_r = rset_read (info->rset_r, rfd->rfd_r, rfd->buf_r,
+ &rfd->term_index_r);
+ return rfd;
}
-static void r_close(rset_control *ct)
+static void r_close (RSFD rfd)
{
- struct rset_bool_info *info = ct->buf;
-
- rset_close (info->rset_l);
- rset_close (info->rset_r);
+ struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
+ struct rset_bool_rfd **rfdp;
+
+ for (rfdp = &info->rfd_list; *rfdp; rfdp = &(*rfdp)->next)
+ if (*rfdp == rfd)
+ {
+ xfree ((*rfdp)->buf_l);
+ xfree ((*rfdp)->buf_r);
+ rset_close (info->rset_l, (*rfdp)->rfd_l);
+ rset_close (info->rset_r, (*rfdp)->rfd_r);
+ *rfdp = (*rfdp)->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)
{
- struct rset_bool_info *info = ct->buf;
+ struct rset_bool_info *info = (struct rset_bool_info *) ct->buf;
+ assert (info->rfd_list == NULL);
+ xfree (ct->rset_terms);
rset_delete (info->rset_l);
rset_delete (info->rset_r);
- xfree (info->buf_l);
- xfree (info->buf_r);
- xfree (ct->buf);
- xfree (ct);
+ xfree (info);
}
-static void r_rewind(rset_control *ct)
+static void r_rewind (RSFD rfd)
{
- struct rset_bool_info *info = ct->buf;
+ struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
+ struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
logf (LOG_DEBUG, "rsbool_rewind");
- rset_rewind (info->rset_l);
- rset_rewind (info->rset_r);
+ rset_rewind (info->rset_l, p->rfd_l);
+ rset_rewind (info->rset_r, p->rfd_r);
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l, &p->term_index_l);
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r, &p->term_index_r);
+}
+
+static int r_count (RSET ct)
+{
+ return 0;
+}
+
+static int r_read_and (RSFD rfd, void *buf, int *term_index)
+{
+ struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
+ struct rset_bool_info *info = p->info;
+
+ while (p->more_l && p->more_r)
+ {
+ int cmp;
+
+ cmp = (*info->cmp)(p->buf_l, p->buf_r);
+ if (!cmp)
+ {
+ memcpy (buf, p->buf_l, info->key_size);
+ *term_index = p->term_index_l;
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ return 1;
+ }
+ else if (cmp == 1)
+ {
+ memcpy (buf, p->buf_r, info->key_size);
+
+ *term_index = p->term_index_r + info->term_index_s;
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ return 1;
+ }
+ else if (cmp == -1)
+ {
+ memcpy (buf, p->buf_l, info->key_size);
+ *term_index = p->term_index_l;
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ return 1;
+ }
+ else if (cmp > 1)
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ else
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ }
+ while (p->more_l)
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ while (p->more_r)
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ return 0;
}
-static int r_count (rset_control *ct)
+static int r_read_or (RSFD rfd, void *buf, int *term_index)
{
+ struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
+ struct rset_bool_info *info = p->info;
+
+ while (p->more_l || p->more_r)
+ {
+ int cmp;
+
+ if (p->more_l && p->more_r)
+ cmp = (*info->cmp)(p->buf_l, p->buf_r);
+ else if (p->more_r)
+ cmp = 2;
+ else
+ cmp = -2;
+ if (!cmp)
+ {
+ memcpy (buf, p->buf_l, info->key_size);
+ *term_index = p->term_index_l;
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ return 1;
+ }
+ else if (cmp > 0)
+ {
+ memcpy (buf, p->buf_r, info->key_size);
+ *term_index = p->term_index_r + info->term_index_s;
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ return 1;
+ }
+ else
+ {
+ memcpy (buf, p->buf_l, info->key_size);
+ *term_index = p->term_index_l;
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ return 1;
+ }
+ }
return 0;
}
-static int r_read (rset_control *ct, void *buf)
+static int r_read_not (RSFD rfd, void *buf, int *term_index)
{
- struct rset_bool_info *info = ct->buf;
+ struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
+ struct rset_bool_info *info = p->info;
+
+ while (p->more_l || p->more_r)
+ {
+ int cmp;
- if (!info->more_l && !info->more_r)
- return 0;
+ if (p->more_l && p->more_r)
+ cmp = (*info->cmp)(p->buf_l, p->buf_r);
+ else if (p->more_r)
+ cmp = 2;
+ else
+ cmp = -2;
+ if (cmp < -1)
+ {
+ memcpy (buf, p->buf_l, info->key_size);
+ *term_index = p->term_index_l;
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ return 1;
+ }
+ else if (cmp > 1)
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ else
+ {
+ memcpy (buf, p->buf_l, info->key_size);
+ do
+ {
+ p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
+ &p->term_index_l);
+ if (!p->more_l)
+ break;
+ cmp = (*info->cmp)(p->buf_l, buf);
+ } while (cmp >= -1 && cmp <= 1);
+ do
+ {
+ p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
+ &p->term_index_r);
+ if (!p->more_r)
+ break;
+ cmp = (*info->cmp)(p->buf_r, buf);
+ } while (cmp >= -1 && cmp <= 1);
+ }
+ }
return 0;
}
-static int r_write (rset_control *ct, const void *buf)
+
+static int r_write (RSFD rfd, const void *buf)
{
logf (LOG_FATAL, "bool set type is read-only");
return -1;
}
+
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