/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o 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, see http://www.gnu.org/licenses/. */
package com.db4o.internal;
import com.db4o.internal.slots.*;
/**
* @exclude
*/
public final class BlockSizeBlockConverter implements BlockConverter {
private final int _blockSize;
public BlockSizeBlockConverter(int blockSize) {
_blockSize = blockSize;
}
public int bytesToBlocks(long bytes) {
return (int) ((bytes + _blockSize -1 )/ _blockSize);
}
public int blockAlignedBytes(int bytes) {
return bytesToBlocks(bytes) * _blockSize;
}
public int blocksToBytes(int blocks){
return blocks * _blockSize;
}
public Slot toBlockedLength(Slot slot){
return new Slot(slot.address(), bytesToBlocks(slot.length()));
}
public Slot toNonBlockedLength(Slot slot){
return new Slot(slot.address(), blocksToBytes(slot.length()));
}
}