/* $Id: hash_drv.h,v 1.11 2006/05/13 01:12:59 jonz Exp $ */

/*
 DSPAM
 COPYRIGHT (C) 2002-2006 JONATHAN A. ZDZIARSKI

 This program 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; version 2
 of the License.

 This program 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#ifndef _HASH_DRV_H
#  define _HASH_DRV_H

#ifdef HAVE_CONFIG_H
#include <auto-config.h>
#endif

#include "config.h"
#include "nodetree.h"
#include "libdspam.h"

#define HASH_REC_MAX	98317
#define HASH_EXTENT_MAX 49157
#define HASH_SEEK_MAX   100

typedef struct _hash_drv_header
{
  unsigned long hash_rec_max;
  struct _ds_spam_totals totals;
  char padding[4]; /* Keep 8-byte alignment */
} *hash_drv_header_t;

typedef struct _hash_drv_map
{
  void *addr;
  int fd;
  size_t file_len;
  hash_drv_header_t header;
  char filename[MAX_FILENAME_LENGTH];
  unsigned long max_seek;
  unsigned long max_extents;
  unsigned long extent_size;
  int flags;
} *hash_drv_map_t;

struct _hash_drv_storage
{
  hash_drv_map_t map;
  FILE *lock;
  int dbh_attached;

  unsigned long offset_nexttoken;
  hash_drv_header_t offset_header;
  unsigned long hash_rec_max;
  unsigned long max_seek;
  unsigned long max_extents;
  unsigned long extent_size;
  int flags;

  struct nt *dir_handles;
} *hash_drv_storage_t;

typedef struct _hash_drv_spam_record
{
  unsigned long long hashcode;
  long nonspam;
  long spam;
} *hash_drv_spam_record_t;

int _hash_drv_get_spamtotals 
  (DSPAM_CTX * CTX);

int _hash_drv_set_spamtotals
  (DSPAM_CTX * CTX);

int _hash_drv_lock_get (
  DSPAM_CTX * CTX, 
  struct _hash_drv_storage *s, 
  const char *username);

int _hash_drv_lock_free (
  struct _hash_drv_storage *s,
  const char *username);

int _hash_drv_open(
  const char *filename,
  hash_drv_map_t map,
  unsigned long recmaxifnew,
  unsigned long max_seek,
  unsigned long max_extents,
  unsigned long extent_size,
  int flags);

int _hash_drv_close
  (hash_drv_map_t map);

int _hash_drv_autoextend
  (hash_drv_map_t map);

unsigned long _hash_drv_seek(
  hash_drv_map_t map,
  unsigned long offset,
  unsigned long long hashcode,
  int flags);

int
_hash_drv_set_spamrecord (
  hash_drv_map_t map,
  hash_drv_spam_record_t wrec);

int
_hash_drv_get_spamrecord (
  hash_drv_map_t map,
  hash_drv_spam_record_t wrec);

#define HSEEK_INSERT	0x01

#define HMAP_AUTOEXTEND	0x01

#endif /* _HASH_DRV_H */