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 }