| /******************************************************************************* |
| * Copyright (c) 2000, 2009 QNX Software Systems 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: |
| * QNX Software Systems - Initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.cdt.utils; |
| |
| |
| import java.io.EOFException; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| |
| /** |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class ERandomAccessFile extends RandomAccessFile { |
| private boolean isle; |
| private long ptr_offset; |
| int val[] = new int[4]; |
| |
| public ERandomAccessFile(String file, String mode) throws IOException { |
| super(file, mode); |
| } |
| |
| public ERandomAccessFile(File file, String mode) throws IOException { |
| super(file, mode); |
| } |
| |
| public void setEndian(boolean le) |
| { |
| isle = le; |
| } |
| |
| public final short readShortE() throws IOException { |
| val[0] = read(); |
| val[1] = read(); |
| if ((val[0] | val[1]) < 0) |
| throw new EOFException(); |
| if ( isle ) { |
| return (short)((val[1] << 8) + val[0]); |
| } |
| return (short)((val[0] << 8) + val[1]); |
| } |
| |
| public final long readIntE() throws IOException |
| { |
| val[0] = read(); |
| val[1] = read(); |
| val[2] = read(); |
| val[3] = read(); |
| if ((val[0] | val[1] | val[2] | val[3]) < 0) |
| throw new EOFException(); |
| if ( isle ) { |
| return ((val[3] << 24) + (val[2] << 16) + (val[1] << 8) + val[0]); |
| } |
| return ((val[0] << 24) + (val[1] << 16) + (val[2] << 8) + val[3]); |
| } |
| |
| public final long readLongE() throws IOException |
| { |
| byte [] bytes = new byte[8]; |
| long result = 0; |
| super.readFully(bytes); |
| int shift = 0; |
| if ( isle ) |
| for(int i=7; i >= 0; i-- ) |
| { |
| shift = i*8; |
| result += ( ((long)bytes[i]) << shift ) & ( 0xffL << shift ); |
| } |
| else |
| for(int i=0; i <= 7; i++ ) |
| { |
| shift = (7-i)*8; |
| result += ( ((long)bytes[i]) << shift ) & ( 0xffL << shift ); |
| } |
| return result; |
| } |
| |
| public final void readFullyE(byte [] bytes) throws IOException |
| { |
| super.readFully(bytes); |
| byte tmp = 0; |
| if( isle ) |
| for(int i=0; i < (bytes.length / 2); i++) |
| { |
| tmp = bytes[i]; |
| bytes[i] = bytes[bytes.length - i -1]; |
| bytes[bytes.length - i -1] = tmp; |
| } |
| } |
| |
| public void setFileOffset( long offset ) throws IOException { |
| ptr_offset = offset; |
| super.seek( offset ); |
| } |
| |
| @Override |
| public long getFilePointer() throws IOException { |
| long ptr = super.getFilePointer(); |
| ptr = ptr - ptr_offset; |
| return ptr; |
| } |
| |
| @Override |
| public void seek( long pos ) throws IOException { |
| long real_pos = pos + ptr_offset; |
| super.seek( real_pos ); |
| } |
| } |
| |
| |