/*
* 21.04.2004 Original verion. davagin@udm.ru.
*-----------------------------------------------------------------------
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*----------------------------------------------------------------------
*/
package davaguine.jmac.tools;
import java.util.Arrays;
/**
* Author: Dmitry Vaguine
* Date: 04.03.2004
* Time: 14:51:31
*/
public class RollBufferShort {
public RollBufferShort() {
m_pData = null;
}
public int Create(int nWindowElements, int nHistoryElements) {
m_nWindowElements = nWindowElements;
m_nHistoryElements = nHistoryElements;
windowPlusHistory = nWindowElements += nHistoryElements;
m_pData = new short[nWindowElements];
Flush();
return 0;
}
public void Flush() {
Arrays.fill(m_pData, 0, m_nHistoryElements, (short) 0);
index = m_nHistoryElements;
}
public void IncrementSafe() {
if ((++index) == windowPlusHistory) {
short aword0[];
int i;
System.arraycopy(aword0 = m_pData, index - (i = m_nHistoryElements), aword0, 0, i);
index = i;
}
}
public short[] m_pData;
public int index;
protected int m_nHistoryElements;
protected int m_nWindowElements;
protected int windowPlusHistory;
}