/*[INCLUDE-IF Sidecar18-SE]*/
/*
 * Copyright IBM Corp. and others 2004
 *
 * 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/
 * or the Apache License, Version 2.0 which accompanies this distribution and
 * is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * This Source Code may also be made available under the following
 * Secondary Licenses when the conditions for such availability set
 * forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
 * General Public License, version 2 with the GNU Classpath
 * Exception [1] and GNU General Public License, version 2 with the
 * OpenJDK Assembly Exception [2].
 *
 * [1] https://www.gnu.org/software/classpath/license.html
 * [2] https://openjdk.org/legal/assembly-exception.html
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
 */
package com.ibm.dtfj.corereaders;

import java.io.IOException;

import javax.imageio.stream.ImageInputStream;

public class DumpReader implements ResourceReleaser {
	private ImageInputStream _file;
	private boolean _is64Bit;

	public DumpReader(ImageInputStream f, boolean is64Bit) {
		_file = f;
		_is64Bit = is64Bit;
	}

	public byte[] readBytes(int n) throws IOException {
		byte[] buffer = new byte[n];
		_file.readFully(buffer);
		return buffer;
	}

	public int readInt() throws IOException {
		return _file.readInt();
	}

	public void seek(long position) throws IOException {
		_file.seek(position);
	}

	public long readLong() throws IOException {
		return _file.readLong();
	}

	public short readShort() throws IOException {
		return _file.readShort();
	}

	public byte readByte() throws IOException {
		return _file.readByte();
	}

	public long readAddress() throws IOException
	{
		long ptr = 0;

		if (_is64Bit) {
			ptr = readLong();
		} else {
			ptr = (0xFFFFFFFFL & readInt());
		}
		return ptr;
	}

	public long getPosition() throws IOException {
		return _file.getStreamPosition();
	}

	public void releaseResources() throws IOException {
		_file.close();
	}
}
