Copyright (c) 2006, 2009 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2006, 2009 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * 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;
	}
}