+++ /dev/null
-/**
-* Copyright (c) 2008 The Board of Trustees of The Leland Stanford Junior
-* University
-*
-* Licensed under the Apache License, Version 2.0 (the "License"); you may
-* not use this file except in compliance with the License. You may obtain
-* a copy of the License at
-*
-* http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-* License for the specific language governing permissions and limitations
-* under the License.
-**/
-
-package org.openflow.util;
-
-import java.math.BigInteger;
-import java.nio.ByteBuffer;
-
-/*****
- * A util library class for dealing with the lack of unsigned datatypes in Java
- *
- * @author Rob Sherwood (rob.sherwood@stanford.edu)
- * @author David Erickson (daviderickson@cs.stanford.edu)
- */
-
-public class Unsigned {
- /**
- * Get an unsigned byte from the current position of the ByteBuffer
- *
- * @param bb ByteBuffer to get the byte from
- * @return an unsigned byte contained in a short
- */
- public static short getUnsignedByte(ByteBuffer bb) {
- return ((short) (bb.get() & (short) 0xff));
- }
-
- /**
- * Get an unsigned byte from the specified offset in the ByteBuffer
- *
- * @param bb ByteBuffer to get the byte from
- * @param offset the offset to get the byte from
- * @return an unsigned byte contained in a short
- */
- public static short getUnsignedByte(ByteBuffer bb, int offset) {
- return ((short) (bb.get(offset) & (short) 0xff));
- }
-
- /**
- * Put an unsigned byte into the specified ByteBuffer at the current
- * position
- *
- * @param bb ByteBuffer to put the byte into
- * @param v the short containing the unsigned byte
- */
- public static void putUnsignedByte(ByteBuffer bb, short v) {
- bb.put((byte) (v & 0xff));
- }
-
- /**
- * Put an unsigned byte into the specified ByteBuffer at the specified
- * offset
- *
- * @param bb ByteBuffer to put the byte into
- * @param v the short containing the unsigned byte
- * @param offset the offset to insert the unsigned byte at
- */
- public static void putUnsignedByte(ByteBuffer bb, short v, int offset) {
- bb.put(offset, (byte) (v & 0xff));
- }
-
- /**
- * Get an unsigned short from the current position of the ByteBuffer
- *
- * @param bb ByteBuffer to get the byte from
- * @return an unsigned short contained in a int
- */
- public static int getUnsignedShort(ByteBuffer bb) {
- return (bb.getShort() & 0xffff);
- }
-
- /**
- * Get an unsigned short from the specified offset in the ByteBuffer
- *
- * @param bb ByteBuffer to get the short from
- * @param offset the offset to get the short from
- * @return an unsigned short contained in a int
- */
- public static int getUnsignedShort(ByteBuffer bb, int offset) {
- return (bb.getShort(offset) & 0xffff);
- }
-
- /**
- * Put an unsigned short into the specified ByteBuffer at the current
- * position
- *
- * @param bb ByteBuffer to put the short into
- * @param v the int containing the unsigned short
- */
- public static void putUnsignedShort(ByteBuffer bb, int v) {
- bb.putShort((short) (v & 0xffff));
- }
-
- /**
- * Put an unsigned short into the specified ByteBuffer at the specified
- * offset
- *
- * @param bb ByteBuffer to put the short into
- * @param v the int containing the unsigned short
- * @param offset the offset to insert the unsigned short at
- */
- public static void putUnsignedShort(ByteBuffer bb, int v, int offset) {
- bb.putShort(offset, (short) (v & 0xffff));
- }
-
- /**
- * Get an unsigned int from the current position of the ByteBuffer
- *
- * @param bb ByteBuffer to get the int from
- * @return an unsigned int contained in a long
- */
- public static long getUnsignedInt(ByteBuffer bb) {
- return ((long) bb.getInt() & 0xffffffffL);
- }
-
- /**
- * Get an unsigned int from the specified offset in the ByteBuffer
- *
- * @param bb ByteBuffer to get the int from
- * @param offset the offset to get the int from
- * @return an unsigned int contained in a long
- */
- public static long getUnsignedInt(ByteBuffer bb, int offset) {
- return ((long) bb.getInt(offset) & 0xffffffffL);
- }
-
- /**
- * Put an unsigned int into the specified ByteBuffer at the current position
- *
- * @param bb ByteBuffer to put the int into
- * @param v the long containing the unsigned int
- */
- public static void putUnsignedInt(ByteBuffer bb, long v) {
- bb.putInt((int) (v & 0xffffffffL));
- }
-
- /**
- * Put an unsigned int into the specified ByteBuffer at the specified offset
- *
- * @param bb ByteBuffer to put the int into
- * @param v the long containing the unsigned int
- * @param offset the offset to insert the unsigned int at
- */
- public static void putUnsignedInt(ByteBuffer bb, long v, int offset) {
- bb.putInt(offset, (int) (v & 0xffffffffL));
- }
-
- /**
- * Get an unsigned long from the current position of the ByteBuffer
- *
- * @param bb ByteBuffer to get the long from
- * @return an unsigned long contained in a BigInteger
- */
- public static BigInteger getUnsignedLong(ByteBuffer bb) {
- byte[] v = new byte[8];
- for (int i = 0; i < 8; ++i) {
- v[i] = bb.get(i);
- }
- return new BigInteger(1, v);
- }
-
- /**
- * Get an unsigned long from the specified offset in the ByteBuffer
- *
- * @param bb ByteBuffer to get the long from
- * @param offset the offset to get the long from
- * @return an unsigned long contained in a BigInteger
- */
- public static BigInteger getUnsignedLong(ByteBuffer bb, int offset) {
- byte[] v = new byte[8];
- for (int i = 0; i < 8; ++i) {
- v[i] = bb.get(offset+i);
- }
- return new BigInteger(1, v);
- }
-
- /**
- * Put an unsigned long into the specified ByteBuffer at the current
- * position
- *
- * @param bb ByteBuffer to put the long into
- * @param v the BigInteger containing the unsigned long
- */
- public static void putUnsignedLong(ByteBuffer bb, BigInteger v) {
- bb.putLong(v.longValue());
- }
-
- /**
- * Put an unsigned long into the specified ByteBuffer at the specified
- * offset
- *
- * @param bb ByteBuffer to put the long into
- * @param v the BigInteger containing the unsigned long
- * @param offset the offset to insert the unsigned long at
- */
- public static void putUnsignedLong(ByteBuffer bb, BigInteger v, int offset) {
- bb.putLong(offset, v.longValue());
- }
-}
Code Review / openflowjava.git / blobdiff