141 lines
4.5 KiB
Java
141 lines
4.5 KiB
Java
/*
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* Copyright 2011 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.buffer;
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import java.nio.ByteOrder;
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/**
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* A big-endian Java heap buffer. It is recommended to use {@link ChannelBuffers#buffer(int)}
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* and {@link ChannelBuffers#wrappedBuffer(byte[])} instead of calling the
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* constructor explicitly.
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*/
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public class BigEndianHeapChannelBuffer extends HeapChannelBuffer {
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/**
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* Creates a new big-endian heap buffer with a newly allocated byte array.
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*
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* @param length the length of the new byte array
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*/
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public BigEndianHeapChannelBuffer(int length) {
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super(length);
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}
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/**
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* Creates a new big-endian heap buffer with an existing byte array.
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*
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* @param array the byte array to wrap
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*/
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public BigEndianHeapChannelBuffer(byte[] array) {
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super(array);
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}
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private BigEndianHeapChannelBuffer(byte[] array, int readerIndex, int writerIndex) {
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super(array, readerIndex, writerIndex);
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}
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@Override
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public ChannelBufferFactory factory() {
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return HeapChannelBufferFactory.getInstance(ByteOrder.BIG_ENDIAN);
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}
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@Override
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public ByteOrder order() {
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return ByteOrder.BIG_ENDIAN;
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}
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@Override
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public short getShort(int index) {
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return (short) (array[index] << 8 | array[index + 1] & 0xFF);
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}
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@Override
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public int getUnsignedMedium(int index) {
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return (array[index] & 0xff) << 16 |
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(array[index + 1] & 0xff) << 8 |
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(array[index + 2] & 0xff) << 0;
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}
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@Override
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public int getInt(int index) {
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return (array[index] & 0xff) << 24 |
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(array[index + 1] & 0xff) << 16 |
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(array[index + 2] & 0xff) << 8 |
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(array[index + 3] & 0xff) << 0;
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}
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@Override
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public long getLong(int index) {
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return ((long) array[index] & 0xff) << 56 |
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((long) array[index + 1] & 0xff) << 48 |
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((long) array[index + 2] & 0xff) << 40 |
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((long) array[index + 3] & 0xff) << 32 |
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((long) array[index + 4] & 0xff) << 24 |
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((long) array[index + 5] & 0xff) << 16 |
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((long) array[index + 6] & 0xff) << 8 |
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((long) array[index + 7] & 0xff) << 0;
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}
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@Override
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public void setShort(int index, int value) {
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array[index] = (byte) (value >>> 8);
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array[index + 1] = (byte) (value >>> 0);
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}
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@Override
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public void setMedium(int index, int value) {
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array[index] = (byte) (value >>> 16);
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array[index + 1] = (byte) (value >>> 8);
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array[index + 2] = (byte) (value >>> 0);
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}
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@Override
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public void setInt(int index, int value) {
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array[index] = (byte) (value >>> 24);
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array[index + 1] = (byte) (value >>> 16);
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array[index + 2] = (byte) (value >>> 8);
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array[index + 3] = (byte) (value >>> 0);
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}
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@Override
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public void setLong(int index, long value) {
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array[index] = (byte) (value >>> 56);
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array[index + 1] = (byte) (value >>> 48);
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array[index + 2] = (byte) (value >>> 40);
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array[index + 3] = (byte) (value >>> 32);
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array[index + 4] = (byte) (value >>> 24);
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array[index + 5] = (byte) (value >>> 16);
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array[index + 6] = (byte) (value >>> 8);
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array[index + 7] = (byte) (value >>> 0);
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}
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@Override
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public ChannelBuffer duplicate() {
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return new BigEndianHeapChannelBuffer(array, readerIndex(), writerIndex());
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}
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@Override
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public ChannelBuffer copy(int index, int length) {
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if (index < 0 || length < 0 || index + length > array.length) {
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throw new IndexOutOfBoundsException();
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}
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byte[] copiedArray = new byte[length];
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System.arraycopy(array, index, copiedArray, 0, length);
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return new BigEndianHeapChannelBuffer(copiedArray);
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}
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}
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