/* * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. *//* * * (C) Copyright IBM Corp. 1999 All Rights Reserved. * Copyright 1997 The Open Group Research Institute. All rights reserved. */package sun.security.krb5.internal.util;import java.io.BufferedInputStream;import java.io.InputStream;import java.io.IOException;/** * This class implements a buffered input stream. It provides methods to read a chunck * of data from underlying data stream. * * @author Yanni Zhang * */public class KrbDataInputStream extends BufferedInputStream{ private boolean bigEndian = true; public void setNativeByteOrder() { if (java.nio.ByteOrder.nativeOrder(). equals(java.nio.ByteOrder.BIG_ENDIAN)) { bigEndian = true; } else { bigEndian = false; } } public KrbDataInputStream(InputStream is){ super(is); } /** * Reads up to the specific number of bytes from this input stream. * @param num the number of bytes to be read. * @return the int value of this byte array. * @exception IOException. */ public int read(int num) throws IOException{ byte[] bytes = new byte[num]; read(bytes, 0, num); int result = 0; for (int i = 0; i < num; i++) { if (bigEndian) { result |= (bytes[i] & 0xff) << (num - i - 1) * 8; } else { result |= (bytes[i] & 0xff) << i * 8; } } return result; } public int readVersion() throws IOException { // always read in big-endian mode int result = (read() & 0xff) << 8; return result | (read() & 0xff); }}
/*
* Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
*
* (C) Copyright IBM Corp. 1999 All Rights Reserved.
* Copyright 1997 The Open Group Research Institute. All rights reserved.
*/
package sun.security.krb5.internal.util;
import java.io.BufferedInputStream;
import java.io.InputStream;
import java.io.IOException;
/**
* This class implements a buffered input stream. It provides methods to read a chunck
* of data from underlying data stream.
*
* @author Yanni Zhang
*
*/
public class KrbDataInputStream extends BufferedInputStream{
private boolean bigEndian = true;
public void setNativeByteOrder() {
if (java.nio.ByteOrder.nativeOrder().
equals(java.nio.ByteOrder.BIG_ENDIAN)) {
bigEndian = true;
} else {
bigEndian = false;
}
}
public KrbDataInputStream(InputStream is){
super(is);
}
/**
* Reads up to the specific number of bytes from this input stream.
* @param num the number of bytes to be read.
* @return the int value of this byte array.
* @exception IOException.
*/
public int read(int num) throws IOException{
byte[] bytes = new byte[num];
read(bytes, 0, num);
int result = 0;
for (int i = 0; i < num; i++) {
if (bigEndian) {
result |= (bytes[i] & 0xff) << (num - i - 1) * 8;
} else {
result |= (bytes[i] & 0xff) << i * 8;
}
}
return result;
}
public int readVersion() throws IOException {
// always read in big-endian mode
int result = (read() & 0xff) << 8;
return result | (read() & 0xff);
}
}