lib/libc/citrus/citrus_db_file.h

   1 /*      $NetBSD: citrus_db_file.h,v 1.3 2008/02/09 14:56:20 junyoung Exp $      */
   2
   3 /*-
   4  * Copyright (c)2003 Citrus Project,
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #ifndef _CITRUS_DB_FILE_H_
  30 #define _CITRUS_DB_FILE_H_
  31
  32 /*
  33  * db format:
  34  *  +---
  35  *  | header
  36  *  |  - magic
  37  *  |  - num entries
  38  *  +---
  39  *  | entry directory
  40  *  |  +------------
  41  *  |  | entry0
  42  *  |  |  - hash value
  43  *  |  |  - next entry
  44  *  |  |  - key offset
  45  *  |  |  - key len
  46  *  |  |  - data offset
  47  *  |  |  - data size
  48  *  |  |---
  49  *  |  | entry1
  50  *  |  | ..
  51  *  |  | entryN
  52  *  |  +---
  53  *  +---
  54  *  | key table
  55  *  |  - key0
  56  *  |   ...
  57  *  |  - keyN
  58  *  +---
  59  *  | data table
  60  *  |  - data0
  61  *  |   ...
  62  *  |  - dataN
  63  *  +---
  64  */
  65
  66 #define _CITRUS_DB_MAGIC_SIZE   8
  67 #define _CITRUS_DB_HEADER_SIZE  16
  68 struct _citrus_db_header_x {
  69         char            dhx_magic[_CITRUS_DB_MAGIC_SIZE];
  70         uint32_t        dhx_num_entries;
  71         uint32_t        dhx_entry_offset;
  72 } __packed;
  73
  74 struct _citrus_db_entry_x {
  75         uint32_t        dex_hash_value;
  76         uint32_t        dex_next_offset;
  77         uint32_t        dex_key_offset;
  78         uint32_t        dex_key_size;
  79         uint32_t        dex_data_offset;
  80         uint32_t        dex_data_size;
  81 } __packed;
  82 #define _CITRUS_DB_ENTRY_SIZE   24
  83
  84 #endif