1 /**
2 * JDBM LICENSE v1.00
3 *
4 * Redistribution and use of this software and associated documentation
5 * ("Software"), with or without modification, are permitted provided
6 * that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain copyright
9 * statements and notices. Redistributions must also contain a
10 * copy of this document.
11 *
12 * 2. Redistributions in binary form must reproduce the
13 * above copyright notice, this list of conditions and the
14 * following disclaimer in the documentation and/or other
15 * materials provided with the distribution.
16 *
17 * 3. The name "JDBM" must not be used to endorse or promote
18 * products derived from this Software without prior written
19 * permission of Cees de Groot. For written permission,
20 * please contact cg@cdegroot.com.
21 *
22 * 4. Products derived from this Software may not be called "JDBM"
23 * nor may "JDBM" appear in their names without prior written
24 * permission of Cees de Groot.
25 *
26 * 5. Due credit should be given to the JDBM Project
27 * (http://jdbm.sourceforge.net/).
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE JDBM PROJECT AND CONTRIBUTORS
30 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
31 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
32 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
33 * CEES DE GROOT OR ANY CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
34 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
35 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
36 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
38 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
40 * OF THE POSSIBILITY OF SUCH DAMAGE.
41 *
42 * Copyright 2000 (C) Cees de Groot. All Rights Reserved.
43 * Contributions are Copyright (C) 2000 by their associated contributors.
44 *
45 * $Id: Magic.java,v 1.1 2000/05/06 00:00:31 boisvert Exp $
46 */
47
48 package jdbm.recman;
49
50 /**
51 * This interface contains magic cookies.
52 */
53 public interface Magic {
54 /** Magic cookie at start of file */
55 public short FILE_HEADER = 0x1350;
56
57 /** Magic for blocks. They're offset by the block type magic codes. */
58 public short BLOCK = 0x1351;
59
60 /** Magics for blocks in certain lists. Offset by baseBlockMagic */
61 short FREE_PAGE = 0;
62 short USED_PAGE = 1;
63 short TRANSLATION_PAGE = 2;
64 short FREELOGIDS_PAGE = 3;
65 short FREEPHYSIDS_PAGE = 4;
66
67 /** Number of lists in a file */
68 public short NLISTS = 5;
69
70 /**
71 * Maximum number of blocks in a file, leaving room for a 16 bit
72 * offset encoded within a long.
73 */
74 long MAX_BLOCKS = 0x7FFFFFFFFFFFL;
75
76 /** Magic for transaction file */
77 short LOGFILE_HEADER = 0x1360;
78
79 /** Size of an externalized byte */
80 public short SZ_BYTE = 1;
81 /** Size of an externalized short */
82 public short SZ_SHORT = 2;
83 /** Size of an externalized int */
84 public short SZ_INT = 4;
85 /** Size of an externalized long */
86 public short SZ_LONG = 8;
87 }