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/*
* @(#)Block.java 1.10 06/10/30
*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
* @(#) Block.java 1.3 - last change made 03/20/98
*/
package com.sun.java.help.search;
import java.io.IOException;
/**
* This class represents a Block of information in DictBlock
*
* @author Jacek Ambroziak
* @author Roger D. Brinkley
* @version 1.3 03/20/98
*/
class Block
{
public static final int HEADERLEN = 8;
public static final int IDLEN = 4;
public int number;
public boolean isLeaf = true;
public int free = 0;
public byte[] data = null;
public Block(int blocksize) {
data = new byte[blocksize - HEADERLEN];
}
public void setBlockNumber(int n) {
number = n;
}
public void setFree(int free) {
free = free;
}
public int integerAt(int i) {
return ((((((data[i++]&0xFF)<<8)
|data[i++]&0xFF)<<8)
|data[i++]&0xFF)<<8)
|data[i]&0xFF;
}
public void setIntegerAt(int i, int value)
{
for (int j = i + 3; j >= i; j--, value >>>= 8)
data[j] = (byte)(value & 0xFF);
}
public static Block readIn(RAFFile in, Block block)
throws IOException
{
debug("readIn");
block.number = in.readInt();
int twoFields = in.readInt();
block.isLeaf = (twoFields & 0x80000000) != 0;
block.free = twoFields & 0x7FFFFFFF;
in.readFully(block.data);
return block;
}
public void writeOut(RAFFile out) throws IOException
{
out.writeInt(number);
out.writeInt(free | (isLeaf ? 0x80000000 : 0));
out.write(data);
}
/**
* Debug code
*/
private static boolean debug=false;
private static void debug(String msg) {
if (debug) {
System.err.println("Block: "+msg);
}
}
}
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