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/*******************************************************************************
 * Copyright (c) 2006, 2009 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.jdt.internal.compiler.parser;

public class RecoveryScannerData {
	public int insertedTokensPtr = -1;
	public int[][] insertedTokens;
	public int[] insertedTokensPosition;
	public boolean[] insertedTokenUsed;

	public int replacedTokensPtr = -1;
	public int[][] replacedTokens;
	public int[] replacedTokensStart;
	public int[] replacedTokensEnd;
	public boolean[] replacedTokenUsed;

	public int removedTokensPtr = -1;
	public int[] removedTokensStart;
	public int[] removedTokensEnd;
	public boolean[] removedTokenUsed;

	public RecoveryScannerData removeUnused() {
		if(this.insertedTokens != null) {
			int newInsertedTokensPtr = -1;
			for (int i = 0; i <= this.insertedTokensPtr; i++) {
				if(this.insertedTokenUsed[i]) {
					newInsertedTokensPtr++;
					this.insertedTokens[newInsertedTokensPtr] = this.insertedTokens[i];
					this.insertedTokensPosition[newInsertedTokensPtr] = this.insertedTokensPosition[i];
					this.insertedTokenUsed[newInsertedTokensPtr] = this.insertedTokenUsed[i];
				}
			}
			this.insertedTokensPtr = newInsertedTokensPtr;
		}

		if(this.replacedTokens != null) {
			int newReplacedTokensPtr = -1;
			for (int i = 0; i <= this.replacedTokensPtr; i++) {
				if(this.replacedTokenUsed[i]) {
					newReplacedTokensPtr++;
					this.replacedTokens[newReplacedTokensPtr] = this.replacedTokens[i];
					this.replacedTokensStart[newReplacedTokensPtr] = this.replacedTokensStart[i];
					this.replacedTokensEnd[newReplacedTokensPtr] = this.replacedTokensEnd[i];
					this.replacedTokenUsed[newReplacedTokensPtr] = this.replacedTokenUsed[i];
				}
			}
			this.replacedTokensPtr = newReplacedTokensPtr;
		}
		if(this.removedTokensStart != null) {
			int newRemovedTokensPtr = -1;
			for (int i = 0; i <= this.removedTokensPtr; i++) {
				if(this.removedTokenUsed[i]) {
					newRemovedTokensPtr++;
					this.removedTokensStart[newRemovedTokensPtr] = this.removedTokensStart[i];
					this.removedTokensEnd[newRemovedTokensPtr] = this.removedTokensEnd[i];
					this.removedTokenUsed[newRemovedTokensPtr] = this.removedTokenUsed[i];
				}
			}
			this.removedTokensPtr = newRemovedTokensPtr;
		}

		return this;
	}
}