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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>
#include <string.h>
static RSFD r_open(RSET ct, int flag);
static void r_close(RSFD rfd);
static void r_delete(RSET ct);
static int r_forward(RSFD rfd, void *buf, TERMID *term, const void *untilbuf);
static void r_pos(RSFD rfd, double *current, double *total);
static int r_read(RSFD rfd, void *buf, TERMID *term);
static int r_read_filter(RSFD rfd, void *buf, TERMID *term);
static const struct rset_control control =
{
"isamb",
r_delete,
rset_get_one_term,
r_open,
r_close,
r_forward,
r_pos,
r_read,
rset_no_write,
};
static const struct rset_control control_filter =
{
"isamb",
r_delete,
rset_get_one_term,
r_open,
r_close,
r_forward,
r_pos,
r_read_filter,
rset_no_write,
};
struct rfd_private {
ISAMB_PP pt;
void *buf;
};
struct rset_private {
ISAMB is;
ISAM_P pos;
};
static int log_level = 0;
static int log_level_initialized = 0;
RSET rsisamb_create(NMEM nmem, struct rset_key_control *kcontrol,
int scope,
ISAMB is, ISAM_P pos, TERMID term)
{
RSET rnew = rset_create_base(
kcontrol->filter_func ? &control_filter : &control,
nmem, kcontrol, scope, term, 0, 0);
struct rset_private *info;
assert(pos);
if (!log_level_initialized)
{
log_level = yaz_log_module_level("rsisamb");
log_level_initialized = 1;
}
info = (struct rset_private *) nmem_malloc(rnew->nmem, sizeof(*info));
info->is = is;
info->pos = pos;
rnew->priv = info;
yaz_log(log_level, "rsisamb_create");
return rnew;
}
static void r_delete(RSET ct)
{
yaz_log(log_level, "rsisamb_delete");
}
RSFD r_open(RSET ct, int flag)
{
struct rset_private *info = (struct rset_private *) ct->priv;
RSFD rfd;
struct rfd_private *ptinfo;
if (flag & RSETF_WRITE)
{
yaz_log(YLOG_FATAL, "ISAMB set type is read-only");
return NULL;
}
rfd = rfd_create_base(ct);
if (rfd->priv)
ptinfo = (struct rfd_private *) (rfd->priv);
else {
ptinfo = (struct rfd_private *) nmem_malloc(ct->nmem,sizeof(*ptinfo));
ptinfo->buf = nmem_malloc(ct->nmem,ct->keycontrol->key_size);
rfd->priv = ptinfo;
}
ptinfo->pt = isamb_pp_open(info->is, info->pos, ct->scope );
yaz_log(log_level, "rsisamb_open");
return rfd;
}
static void r_close(RSFD rfd)
{
struct rfd_private *ptinfo = (struct rfd_private *)(rfd->priv);
isamb_pp_close (ptinfo->pt);
yaz_log(log_level, "rsisamb_close");
}
static int r_forward(RSFD rfd, void *buf, TERMID *term, const void *untilbuf)
{
struct rfd_private *pinfo = (struct rfd_private *)(rfd->priv);
int rc;
rc = isamb_pp_forward(pinfo->pt, buf, untilbuf);
if (rc && term)
*term = rfd->rset->term;
yaz_log(log_level, "rsisamb_forward");
return rc;
}
static void r_pos(RSFD rfd, double *current, double *total)
{
struct rfd_private *pinfo = (struct rfd_private *)(rfd->priv);
assert(rfd);
isamb_pp_pos(pinfo->pt, current, total);
yaz_log(log_level, "isamb.r_pos returning %0.1f/%0.1f",
*current, *total);
}
static int r_read(RSFD rfd, void *buf, TERMID *term)
{
struct rfd_private *pinfo = (struct rfd_private *)(rfd->priv);
int rc;
rc = isamb_pp_read(pinfo->pt, buf);
if (rc && term)
*term = rfd->rset->term;
yaz_log(log_level, "isamb.r_read ");
return rc;
}
static int r_read_filter(RSFD rfd, void *buf, TERMID *term)
{
struct rfd_private *pinfo = (struct rfd_private *)rfd->priv;
const struct rset_key_control *kctrl = rfd->rset->keycontrol;
int rc;
while((rc = isamb_pp_read(pinfo->pt, buf)))
{
int incl = (*kctrl->filter_func)(buf, kctrl->filter_data);
if (incl)
break;
}
if (rc && term)
*term = rfd->rset->term;
yaz_log(log_level, "isamb.r_read_filter");
return rc;
}
/*
* 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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