01: /**
02: * JDBM LICENSE v1.00
03: *
04: * Redistribution and use of this software and associated documentation
05: * ("Software"), with or without modification, are permitted provided
06: * that the following conditions are met:
07: *
08: * 1. Redistributions of source code must retain copyright
09: * 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: */package jdbm.recman;
47:
48: /**
49: * This interface contains magic cookies.
50: */
51: public interface Magic {
52: /** Magic cookie at start of file */
53: public short FILE_HEADER = 0x1350;
54:
55: /** Magic for blocks. They're offset by the block type magic codes. */
56: public short BLOCK = 0x1351;
57:
58: /** Magics for blocks in certain lists. Offset by baseBlockMagic */
59: short FREE_PAGE = 0;
60: short USED_PAGE = 1;
61: short TRANSLATION_PAGE = 2;
62: short FREELOGIDS_PAGE = 3;
63: short FREEPHYSIDS_PAGE = 4;
64:
65: /** Number of lists in a file */
66: public short NLISTS = 5;
67:
68: /**
69: * Maximum number of blocks in a file, leaving room for a 16 bit
70: * offset encoded within a long.
71: */
72: long MAX_BLOCKS = 0x7FFFFFFFFFFFL;
73:
74: /** Magic for transaction file */
75: short LOGFILE_HEADER = 0x1360;
76:
77: /** Size of an externalized byte */
78: public short SZ_BYTE = 1;
79: /** Size of an externalized short */
80: public short SZ_SHORT = 2;
81: /** Size of an externalized int */
82: public short SZ_INT = 4;
83: /** Size of an externalized long */
84: public short SZ_LONG = 8;
85: }
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