655 lines
19 KiB
Java
655 lines
19 KiB
Java
/*
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* Copyright 2012 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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* https://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.net5.buffer;
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import static io.net5.util.internal.ObjectUtil.checkPositiveOrZero;
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import static java.util.Objects.requireNonNull;
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import io.net5.util.internal.PlatformDependent;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.nio.channels.ClosedChannelException;
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import java.nio.channels.FileChannel;
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import java.nio.channels.GatheringByteChannel;
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import java.nio.channels.ScatteringByteChannel;
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/**
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* A NIO {@link ByteBuffer} based buffer. It is recommended to use
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* {@link UnpooledByteBufAllocator#directBuffer(int, int)}, {@link Unpooled#directBuffer(int)} and
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* {@link Unpooled#wrappedBuffer(ByteBuffer)} instead of calling the constructor explicitly.
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*/
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public class UnpooledDirectByteBuf extends AbstractReferenceCountedByteBuf {
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private final ByteBufAllocator alloc;
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ByteBuffer buffer; // accessed by UnpooledUnsafeNoCleanerDirectByteBuf.reallocateDirect()
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private ByteBuffer tmpNioBuf;
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private int capacity;
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private boolean doNotFree;
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/**
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* Creates a new direct buffer.
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*
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* @param initialCapacity the initial capacity of the underlying direct buffer
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* @param maxCapacity the maximum capacity of the underlying direct buffer
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*/
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public UnpooledDirectByteBuf(ByteBufAllocator alloc, int initialCapacity, int maxCapacity) {
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super(maxCapacity);
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requireNonNull(alloc, "alloc");
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checkPositiveOrZero(initialCapacity, "initialCapacity");
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checkPositiveOrZero(maxCapacity, "maxCapacity");
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if (initialCapacity > maxCapacity) {
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throw new IllegalArgumentException(String.format(
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"initialCapacity(%d) > maxCapacity(%d)", initialCapacity, maxCapacity));
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}
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this.alloc = alloc;
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setByteBuffer(allocateDirect(initialCapacity), false);
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}
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/**
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* Creates a new direct buffer by wrapping the specified initial buffer.
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*
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* @param maxCapacity the maximum capacity of the underlying direct buffer
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*/
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protected UnpooledDirectByteBuf(ByteBufAllocator alloc, ByteBuffer initialBuffer, int maxCapacity) {
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this(alloc, initialBuffer, maxCapacity, false, true);
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}
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UnpooledDirectByteBuf(ByteBufAllocator alloc, ByteBuffer initialBuffer,
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int maxCapacity, boolean doFree, boolean slice) {
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super(maxCapacity);
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requireNonNull(alloc, "alloc");
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requireNonNull(initialBuffer, "initialBuffer");
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if (!initialBuffer.isDirect()) {
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throw new IllegalArgumentException("initialBuffer is not a direct buffer.");
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}
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if (initialBuffer.isReadOnly()) {
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throw new IllegalArgumentException("initialBuffer is a read-only buffer.");
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}
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int initialCapacity = initialBuffer.remaining();
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if (initialCapacity > maxCapacity) {
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throw new IllegalArgumentException(String.format(
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"initialCapacity(%d) > maxCapacity(%d)", initialCapacity, maxCapacity));
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}
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this.alloc = alloc;
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doNotFree = !doFree;
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setByteBuffer((slice ? initialBuffer.slice() : initialBuffer).order(ByteOrder.BIG_ENDIAN), false);
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writerIndex(initialCapacity);
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}
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/**
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* Allocate a new direct {@link ByteBuffer} with the given initialCapacity.
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*/
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protected ByteBuffer allocateDirect(int initialCapacity) {
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return ByteBuffer.allocateDirect(initialCapacity);
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}
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/**
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* Free a direct {@link ByteBuffer}
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*/
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protected void freeDirect(ByteBuffer buffer) {
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PlatformDependent.freeDirectBuffer(buffer);
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}
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void setByteBuffer(ByteBuffer buffer, boolean tryFree) {
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if (tryFree) {
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ByteBuffer oldBuffer = this.buffer;
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if (oldBuffer != null) {
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if (doNotFree) {
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doNotFree = false;
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} else {
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freeDirect(oldBuffer);
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}
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}
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}
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this.buffer = buffer;
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tmpNioBuf = null;
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capacity = buffer.remaining();
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}
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@Override
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public boolean isDirect() {
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return true;
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}
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@Override
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public int capacity() {
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return capacity;
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}
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@Override
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public ByteBuf capacity(int newCapacity) {
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checkNewCapacity(newCapacity);
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int oldCapacity = capacity;
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if (newCapacity == oldCapacity) {
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return this;
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}
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int bytesToCopy;
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if (newCapacity > oldCapacity) {
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bytesToCopy = oldCapacity;
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} else {
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trimIndicesToCapacity(newCapacity);
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bytesToCopy = newCapacity;
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}
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ByteBuffer oldBuffer = buffer;
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ByteBuffer newBuffer = allocateDirect(newCapacity);
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oldBuffer.position(0).limit(bytesToCopy);
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newBuffer.position(0).limit(bytesToCopy);
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newBuffer.put(oldBuffer).clear();
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setByteBuffer(newBuffer, true);
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return this;
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}
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@Override
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public ByteBufAllocator alloc() {
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return alloc;
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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 boolean hasArray() {
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return false;
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}
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@Override
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public byte[] array() {
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throw new UnsupportedOperationException("direct buffer");
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}
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@Override
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public int arrayOffset() {
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throw new UnsupportedOperationException("direct buffer");
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}
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@Override
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public boolean hasMemoryAddress() {
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return false;
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}
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@Override
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public long memoryAddress() {
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throw new UnsupportedOperationException();
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}
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@Override
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public byte getByte(int index) {
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ensureAccessible();
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return _getByte(index);
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}
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@Override
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protected byte _getByte(int index) {
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return buffer.get(index);
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}
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@Override
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public short getShort(int index) {
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ensureAccessible();
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return _getShort(index);
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}
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@Override
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protected short _getShort(int index) {
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return buffer.getShort(index);
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}
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@Override
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protected short _getShortLE(int index) {
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return ByteBufUtil.swapShort(buffer.getShort(index));
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}
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@Override
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public int getUnsignedMedium(int index) {
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ensureAccessible();
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return _getUnsignedMedium(index);
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}
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@Override
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protected int _getUnsignedMedium(int index) {
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return (getByte(index) & 0xff) << 16 |
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(getByte(index + 1) & 0xff) << 8 |
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getByte(index + 2) & 0xff;
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}
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@Override
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protected int _getUnsignedMediumLE(int index) {
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return getByte(index) & 0xff |
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(getByte(index + 1) & 0xff) << 8 |
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(getByte(index + 2) & 0xff) << 16;
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}
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@Override
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public int getInt(int index) {
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ensureAccessible();
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return _getInt(index);
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}
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@Override
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protected int _getInt(int index) {
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return buffer.getInt(index);
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}
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@Override
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protected int _getIntLE(int index) {
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return ByteBufUtil.swapInt(buffer.getInt(index));
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}
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@Override
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public long getLong(int index) {
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ensureAccessible();
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return _getLong(index);
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}
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@Override
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protected long _getLong(int index) {
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return buffer.getLong(index);
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}
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@Override
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protected long _getLongLE(int index) {
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return ByteBufUtil.swapLong(buffer.getLong(index));
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}
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@Override
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public ByteBuf getBytes(int index, ByteBuf dst, int dstIndex, int length) {
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checkDstIndex(index, length, dstIndex, dst.capacity());
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if (dst.hasArray()) {
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getBytes(index, dst.array(), dst.arrayOffset() + dstIndex, length);
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} else if (dst.nioBufferCount() > 0) {
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for (ByteBuffer bb: dst.nioBuffers(dstIndex, length)) {
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int bbLen = bb.remaining();
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getBytes(index, bb);
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index += bbLen;
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}
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} else {
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dst.setBytes(dstIndex, this, index, length);
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}
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return this;
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}
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@Override
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public ByteBuf getBytes(int index, byte[] dst, int dstIndex, int length) {
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getBytes(index, dst, dstIndex, length, false);
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return this;
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}
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void getBytes(int index, byte[] dst, int dstIndex, int length, boolean internal) {
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checkDstIndex(index, length, dstIndex, dst.length);
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ByteBuffer tmpBuf;
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if (internal) {
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tmpBuf = internalNioBuffer();
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} else {
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tmpBuf = buffer.duplicate();
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}
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tmpBuf.clear().position(index).limit(index + length);
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tmpBuf.get(dst, dstIndex, length);
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}
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@Override
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public ByteBuf readBytes(byte[] dst, int dstIndex, int length) {
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checkReadableBytes(length);
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getBytes(readerIndex, dst, dstIndex, length, true);
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readerIndex += length;
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return this;
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}
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@Override
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public ByteBuf getBytes(int index, ByteBuffer dst) {
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getBytes(index, dst, false);
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return this;
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}
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void getBytes(int index, ByteBuffer dst, boolean internal) {
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checkIndex(index, dst.remaining());
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ByteBuffer tmpBuf;
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if (internal) {
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tmpBuf = internalNioBuffer();
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} else {
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tmpBuf = buffer.duplicate();
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}
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tmpBuf.clear().position(index).limit(index + dst.remaining());
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dst.put(tmpBuf);
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}
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@Override
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public ByteBuf readBytes(ByteBuffer dst) {
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int length = dst.remaining();
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checkReadableBytes(length);
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getBytes(readerIndex, dst, true);
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readerIndex += length;
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return this;
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}
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@Override
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public ByteBuf setByte(int index, int value) {
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ensureAccessible();
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_setByte(index, value);
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return this;
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}
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@Override
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protected void _setByte(int index, int value) {
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buffer.put(index, (byte) value);
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}
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@Override
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public ByteBuf setShort(int index, int value) {
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ensureAccessible();
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_setShort(index, value);
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return this;
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}
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@Override
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protected void _setShort(int index, int value) {
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buffer.putShort(index, (short) value);
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}
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@Override
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protected void _setShortLE(int index, int value) {
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buffer.putShort(index, ByteBufUtil.swapShort((short) value));
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}
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@Override
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public ByteBuf setMedium(int index, int value) {
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ensureAccessible();
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_setMedium(index, value);
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return this;
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}
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@Override
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protected void _setMedium(int index, int value) {
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setByte(index, (byte) (value >>> 16));
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setByte(index + 1, (byte) (value >>> 8));
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setByte(index + 2, (byte) value);
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}
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@Override
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protected void _setMediumLE(int index, int value) {
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setByte(index, (byte) value);
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setByte(index + 1, (byte) (value >>> 8));
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setByte(index + 2, (byte) (value >>> 16));
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}
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@Override
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public ByteBuf setInt(int index, int value) {
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ensureAccessible();
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_setInt(index, value);
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return this;
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}
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@Override
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protected void _setInt(int index, int value) {
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buffer.putInt(index, value);
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}
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@Override
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protected void _setIntLE(int index, int value) {
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buffer.putInt(index, ByteBufUtil.swapInt(value));
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}
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@Override
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public ByteBuf setLong(int index, long value) {
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ensureAccessible();
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_setLong(index, value);
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return this;
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}
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@Override
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protected void _setLong(int index, long value) {
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buffer.putLong(index, value);
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}
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@Override
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protected void _setLongLE(int index, long value) {
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buffer.putLong(index, ByteBufUtil.swapLong(value));
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}
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@Override
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public ByteBuf setBytes(int index, ByteBuf src, int srcIndex, int length) {
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checkSrcIndex(index, length, srcIndex, src.capacity());
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if (src.nioBufferCount() > 0) {
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for (ByteBuffer bb: src.nioBuffers(srcIndex, length)) {
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int bbLen = bb.remaining();
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setBytes(index, bb);
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index += bbLen;
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}
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} else {
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src.getBytes(srcIndex, this, index, length);
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}
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return this;
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}
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@Override
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public ByteBuf setBytes(int index, byte[] src, int srcIndex, int length) {
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checkSrcIndex(index, length, srcIndex, src.length);
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ByteBuffer tmpBuf = internalNioBuffer();
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tmpBuf.clear().position(index).limit(index + length);
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tmpBuf.put(src, srcIndex, length);
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return this;
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}
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@Override
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public ByteBuf setBytes(int index, ByteBuffer src) {
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ensureAccessible();
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ByteBuffer tmpBuf = internalNioBuffer();
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if (src == tmpBuf) {
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src = src.duplicate();
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}
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tmpBuf.clear().position(index).limit(index + src.remaining());
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tmpBuf.put(src);
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return this;
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}
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@Override
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public ByteBuf getBytes(int index, OutputStream out, int length) throws IOException {
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getBytes(index, out, length, false);
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return this;
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}
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void getBytes(int index, OutputStream out, int length, boolean internal) throws IOException {
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ensureAccessible();
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if (length == 0) {
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return;
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}
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ByteBufUtil.readBytes(alloc(), internal ? internalNioBuffer() : buffer.duplicate(), index, length, out);
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}
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@Override
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public ByteBuf readBytes(OutputStream out, int length) throws IOException {
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checkReadableBytes(length);
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getBytes(readerIndex, out, length, true);
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readerIndex += length;
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return this;
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}
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@Override
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public int getBytes(int index, GatheringByteChannel out, int length) throws IOException {
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return getBytes(index, out, length, false);
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}
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private int getBytes(int index, GatheringByteChannel out, int length, boolean internal) throws IOException {
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ensureAccessible();
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if (length == 0) {
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return 0;
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}
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ByteBuffer tmpBuf;
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if (internal) {
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tmpBuf = internalNioBuffer();
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} else {
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tmpBuf = buffer.duplicate();
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}
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tmpBuf.clear().position(index).limit(index + length);
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return out.write(tmpBuf);
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}
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@Override
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public int getBytes(int index, FileChannel out, long position, int length) throws IOException {
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return getBytes(index, out, position, length, false);
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}
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private int getBytes(int index, FileChannel out, long position, int length, boolean internal) throws IOException {
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ensureAccessible();
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if (length == 0) {
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return 0;
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}
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ByteBuffer tmpBuf = internal ? internalNioBuffer() : buffer.duplicate();
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tmpBuf.clear().position(index).limit(index + length);
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return out.write(tmpBuf, position);
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}
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@Override
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public int readBytes(GatheringByteChannel out, int length) throws IOException {
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checkReadableBytes(length);
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int readBytes = getBytes(readerIndex, out, length, true);
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readerIndex += readBytes;
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return readBytes;
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}
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@Override
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public int readBytes(FileChannel out, long position, int length) throws IOException {
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checkReadableBytes(length);
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int readBytes = getBytes(readerIndex, out, position, length, true);
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readerIndex += readBytes;
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return readBytes;
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}
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@Override
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public int setBytes(int index, InputStream in, int length) throws IOException {
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ensureAccessible();
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if (buffer.hasArray()) {
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return in.read(buffer.array(), buffer.arrayOffset() + index, length);
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} else {
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byte[] tmp = ByteBufUtil.threadLocalTempArray(length);
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int readBytes = in.read(tmp, 0, length);
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if (readBytes <= 0) {
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return readBytes;
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}
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ByteBuffer tmpBuf = internalNioBuffer();
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tmpBuf.clear().position(index);
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tmpBuf.put(tmp, 0, readBytes);
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return readBytes;
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}
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}
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@Override
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public int setBytes(int index, ScatteringByteChannel in, int length) throws IOException {
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ensureAccessible();
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ByteBuffer tmpBuf = internalNioBuffer();
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tmpBuf.clear().position(index).limit(index + length);
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try {
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return in.read(tmpBuf);
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} catch (ClosedChannelException ignored) {
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return -1;
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}
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}
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@Override
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public int setBytes(int index, FileChannel in, long position, int length) throws IOException {
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ensureAccessible();
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ByteBuffer tmpBuf = internalNioBuffer();
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tmpBuf.clear().position(index).limit(index + length);
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try {
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return in.read(tmpBuf, position);
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} catch (ClosedChannelException ignored) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public int nioBufferCount() {
|
|
return 1;
|
|
}
|
|
|
|
@Override
|
|
public ByteBuffer[] nioBuffers(int index, int length) {
|
|
return new ByteBuffer[] { nioBuffer(index, length) };
|
|
}
|
|
|
|
@Override
|
|
public final boolean isContiguous() {
|
|
return true;
|
|
}
|
|
|
|
@Override
|
|
public ByteBuf copy(int index, int length) {
|
|
ensureAccessible();
|
|
ByteBuffer src;
|
|
try {
|
|
src = (ByteBuffer) buffer.duplicate().clear().position(index).limit(index + length);
|
|
} catch (IllegalArgumentException ignored) {
|
|
throw new IndexOutOfBoundsException("Too many bytes to read - Need " + (index + length));
|
|
}
|
|
|
|
return alloc().directBuffer(length, maxCapacity()).writeBytes(src);
|
|
}
|
|
|
|
@Override
|
|
public ByteBuffer internalNioBuffer(int index, int length) {
|
|
checkIndex(index, length);
|
|
return (ByteBuffer) internalNioBuffer().clear().position(index).limit(index + length);
|
|
}
|
|
|
|
private ByteBuffer internalNioBuffer() {
|
|
ByteBuffer tmpNioBuf = this.tmpNioBuf;
|
|
if (tmpNioBuf == null) {
|
|
this.tmpNioBuf = tmpNioBuf = buffer.duplicate();
|
|
}
|
|
return tmpNioBuf;
|
|
}
|
|
|
|
@Override
|
|
public ByteBuffer nioBuffer(int index, int length) {
|
|
checkIndex(index, length);
|
|
return ((ByteBuffer) buffer.duplicate().position(index).limit(index + length)).slice();
|
|
}
|
|
|
|
@Override
|
|
protected void deallocate() {
|
|
ByteBuffer buffer = this.buffer;
|
|
if (buffer == null) {
|
|
return;
|
|
}
|
|
|
|
this.buffer = null;
|
|
|
|
if (!doNotFree) {
|
|
freeDirect(buffer);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public ByteBuf unwrap() {
|
|
return null;
|
|
}
|
|
}
|