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      1 /*	$NetBSD: citrus_db_file.h,v 1.4 2008/02/10 05:58:22 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
     85