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/* This file is part of the Zebra server.
Copyright (C) Index Data
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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <assert.h>
#include <idzebra/util.h>
#include <rset.h>
static RSFD r_open(RSET ct, int flag);
static void r_close(RSFD rfd);
static void r_delete(RSET ct);
static void r_pos(RSFD rfd, double *current, double *total);
static int r_read(RSFD rfd, void *buf, TERMID *term);
static const struct rset_control control =
{
"null",
r_delete,
rset_get_one_term,
r_open,
r_close,
0, /* no forward */
r_pos,
r_read,
rset_no_write,
};
RSET rset_create_null(NMEM nmem, struct rset_key_control *kcontrol,
TERMID term)
{
RSET rnew = rset_create_base(&control, nmem, kcontrol, 0, term, 0, 0);
rnew->priv = 0;
return rnew;
}
static RSFD r_open(RSET ct, int flag)
{
RSFD rfd;
if (flag & RSETF_WRITE)
{
yaz_log (YLOG_FATAL, "NULL set type is read-only");
return NULL;
}
rfd = rfd_create_base(ct);
rfd->priv = 0;
return rfd;
}
static void r_close(RSFD rfd)
{
}
static void r_delete(RSET ct)
{
}
static void r_pos(RSFD rfd, double *current, double *total)
{
assert(rfd);
assert(current);
assert(total);
*total = 0;
*current = 0;
}
static int r_read(RSFD rfd, void *buf, TERMID *term)
{
if (term)
*term = 0;
return 0;
}
/*
* Local variables:
* c-basic-offset: 4
* c-file-style: "Stroustrup"
* indent-tabs-mode: nil
* End:
* vim: shiftwidth=4 tabstop=8 expandtab
*/
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