/*
* Created on 1 Nov 2006
* Created by Paul Gardner
* Copyright (C) 2006 Aelitis, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program 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 for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* AELITIS, SAS au capital de 63.529,40 euros
* 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
*
*/
package org.gudy.azureus2.core3.disk.impl;
import org.gudy.azureus2.core3.config.COConfigurationManager;
import org.gudy.azureus2.core3.config.ParameterListener;
import org.gudy.azureus2.core3.disk.DiskManager;
import org.gudy.azureus2.core3.logging.LogEvent;
import org.gudy.azureus2.core3.logging.LogIDs;
import org.gudy.azureus2.core3.logging.Logger;
public class
DiskManagerUtil
{
private static final LogIDs LOGID = LogIDs.DISK;
protected static int max_read_block_size;
static{
ParameterListener param_listener = new ParameterListener() {
public void
parameterChanged(
String str )
{
max_read_block_size = COConfigurationManager.getIntParameter( "BT Request Max Block Size" );
}
};
COConfigurationManager.addAndFireParameterListener( "BT Request Max Block Size", param_listener);
}
public static boolean
checkBlockConsistencyForHint(
DiskManager dm,
String originator,
int pieceNumber,
int offset,
int length)
{
if (length <= 0 ) {
if (Logger.isEnabled())
Logger.log(new LogEvent(dm, LOGID, LogEvent.LT_ERROR,
"Hint invalid: " + originator + " length=" + length + " <= 0"));
return false;
}
if (pieceNumber < 0) {
if (Logger.isEnabled())
Logger.log(new LogEvent(dm, LOGID, LogEvent.LT_ERROR,
"Hint invalid: " + originator + " pieceNumber=" + pieceNumber + " < 0"));
return false;
}
if (pieceNumber >= dm.getNbPieces()) {
if (Logger.isEnabled())
Logger.log(new LogEvent(dm, LOGID, LogEvent.LT_ERROR,
"Hint invalid: " + originator + " pieceNumber=" + pieceNumber + " >= this.nbPieces="
+ dm.getNbPieces()));
return false;
}
int pLength = dm.getPieceLength(pieceNumber);
if (offset < 0) {
if (Logger.isEnabled())
Logger.log(new LogEvent(dm, LOGID, LogEvent.LT_ERROR,
"Hint invalid: " + originator + " offset=" + offset + " < 0"));
return false;
}
if (offset > pLength) {
if (Logger.isEnabled())
Logger.log(new LogEvent(dm, LOGID, LogEvent.LT_ERROR,
"Hint invalid: " + originator + " offset=" + offset + " > pLength=" + pLength));
return false;
}
if (offset + length > pLength) {
if (Logger.isEnabled())
Logger.log(new LogEvent(dm, LOGID, LogEvent.LT_ERROR,
"Hint invalid: " + originator + " offset=" + offset + " + length=" + length
+ " > pLength=" + pLength));
return false;
}
return true;
}
public static boolean
checkBlockConsistencyForRead(
DiskManager dm,
String originator,
int pieceNumber,
int offset,
int length)
{
if ( !checkBlockConsistencyForHint( dm, originator, pieceNumber, offset, length )){
return( false );
}
if (length > max_read_block_size) {
if (Logger.isEnabled())
Logger.log(new LogEvent(dm, LOGID, LogEvent.LT_ERROR,
"Read invalid: " + originator + " length=" + length + " > " + max_read_block_size));
return false;
}
if(!dm.getPiece(pieceNumber).isDone()) {
Logger.log(new LogEvent(dm, LOGID, LogEvent.LT_ERROR,
"Read invalid: " + originator + " piece #" + pieceNumber + " not done"));
return false;
}
return true;
}
}