/*

 * Copyright © 2010 Codethink Limited

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, see <http://www.gnu.org/licenses/>.

 *

 * Author: Ryan Lortie <desrt@desrt.ca>

 */

#ifndef __gvdb_format_h__

#define __gvdb_format_h__

#include <glib.h>

typedef struct { guint16 value; } guint16_le;

typedef struct { guint32 value; } guint32_le;

struct gvdb_pointer {

  guint32_le start;

  guint32_le end;

};

struct gvdb_hash_header {

  guint32_le n_bloom_words;

  guint32_le n_buckets;

};

struct gvdb_hash_item {

  guint32_le hash_value;

  guint32_le parent;

  guint32_le key_start;

  guint16_le key_size;

  gchar type;

  gchar unused;

  union

  {

    struct gvdb_pointer pointer;

    gchar direct[8];

  } value;

};

struct gvdb_header {

  guint32 signature[2];

  guint32_le version;

  guint32_le options;

  struct gvdb_pointer root;

};

static inline guint32_le guint32_to_le (guint32 value) {

  guint32_le result = { GUINT32_TO_LE (value) };

  return result;

}

static inline guint32 guint32_from_le (guint32_le value) {

  return GUINT32_FROM_LE (value.value);

}

static inline guint16_le guint16_to_le (guint16 value) {

  guint16_le result = { GUINT16_TO_LE (value) };

  return result;

}

static inline guint16 guint16_from_le (guint16_le value) {

  return GUINT16_FROM_LE (value.value);

}

#define GVDB_SIGNATURE0 1918981703

#define GVDB_SIGNATURE1 1953390953

#define GVDB_SWAPPED_SIGNATURE0 GUINT32_SWAP_LE_BE (GVDB_SIGNATURE0)

#define GVDB_SWAPPED_SIGNATURE1 GUINT32_SWAP_LE_BE (GVDB_SIGNATURE1)

#endif /* __gvdb_format_h__ */