001 /** 002 * JDBM LICENSE v1.00 003 * 004 * Redistribution and use of this software and associated documentation 005 * ("Software"), with or without modification, are permitted provided 006 * that the following conditions are met: 007 * 008 * 1. Redistributions of source code must retain copyright 009 * statements and notices. Redistributions must also contain a 010 * copy of this document. 011 * 012 * 2. Redistributions in binary form must reproduce the 013 * above copyright notice, this list of conditions and the 014 * following disclaimer in the documentation and/or other 015 * materials provided with the distribution. 016 * 017 * 3. The name "JDBM" must not be used to endorse or promote 018 * products derived from this Software without prior written 019 * permission of Cees de Groot. For written permission, 020 * please contact cg@cdegroot.com. 021 * 022 * 4. Products derived from this Software may not be called "JDBM" 023 * nor may "JDBM" appear in their names without prior written 024 * permission of Cees de Groot. 025 * 026 * 5. Due credit should be given to the JDBM Project 027 * (http://jdbm.sourceforge.net/). 028 * 029 * THIS SOFTWARE IS PROVIDED BY THE JDBM PROJECT AND CONTRIBUTORS 030 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 031 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 032 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 033 * CEES DE GROOT OR ANY CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 034 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 035 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 036 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 037 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 038 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 039 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 040 * OF THE POSSIBILITY OF SUCH DAMAGE. 041 * 042 * Copyright 2000 (C) Cees de Groot. All Rights Reserved. 043 * Contributions are Copyright (C) 2000 by their associated contributors. 044 * 045 * $Id: Magic.java,v 1.1 2000/05/06 00:00:31 boisvert Exp $ 046 */ 047 package jdbm.recman; 048 049 050 /** 051 * This interface contains magic cookies. 052 */ 053 public interface Magic 054 { 055 /** Magic cookie at start of file */ 056 short FILE_HEADER = 0x1350; 057 058 /** Magic for blocks. They're offset by the block type magic codes. */ 059 short BLOCK = 0x1351; 060 061 /** Magics for block types in certain lists. Offset by baseBlockMagic */ 062 short FREE_PAGE = 0; 063 short USED_PAGE = 1; 064 short TRANSLATION_PAGE = 2; 065 short FREELOGIDS_PAGE = 3; 066 short FREEPHYSIDS_PAGE = 4; 067 068 /** Number of lists in a file */ 069 public short NLISTS = 5; 070 071 /** 072 * Maximum number of blocks in a file, leaving room for a 16 bit 073 * offset encoded within a long. 074 */ 075 long MAX_BLOCKS = 0x7FFFFFFFFFFFL; 076 077 /** Magic for transaction file */ 078 short LOGFILE_HEADER = 0x1360; 079 080 /** Size of an externalized byte */ 081 short SZ_BYTE = 1; 082 /** Size of an externalized short */ 083 short SZ_SHORT = 2; 084 /** Size of an externalized int */ 085 short SZ_INT = 4; 086 /** Size of an externalized long */ 087 short SZ_LONG = 8; 088 }