2012-12-05 22:11:48 +01:00
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/*
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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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* 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.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.channels.ClosedChannelException;
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import java.nio.channels.GatheringByteChannel;
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import java.nio.channels.ScatteringByteChannel;
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final class PooledDirectByteBuf extends PooledByteBuf<ByteBuffer> {
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PooledDirectByteBuf(int maxCapacity) {
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super(maxCapacity);
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}
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@Override
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protected ByteBuffer newInternalNioBuffer(ByteBuffer memory) {
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return memory.duplicate();
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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 byte getByte(int index) {
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checkIndex(index);
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return memory.get(idx(index));
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}
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@Override
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public short getShort(int index) {
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checkIndex(index, 2);
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return memory.getShort(idx(index));
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}
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@Override
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public int getUnsignedMedium(int index) {
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checkIndex(index, 3);
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index = idx(index);
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return (memory.get(index) & 0xff) << 16 | (memory.get(index + 1) & 0xff) << 8 | memory.get(index + 2) & 0xff;
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}
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@Override
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public int getInt(int index) {
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checkIndex(index, 4);
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return memory.getInt(idx(index));
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}
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@Override
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public long getLong(int index) {
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checkIndex(index, 8);
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return memory.getLong(idx(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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checkIndex(index, length);
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if (dst instanceof PooledDirectByteBuf) {
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PooledDirectByteBuf bbdst = (PooledDirectByteBuf) dst;
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ByteBuffer data = bbdst.internalNioBuffer();
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dstIndex = bbdst.idx(dstIndex);
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data.clear().position(dstIndex).limit(dstIndex + length);
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getBytes(index, data);
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} else if (dst.hasArray()) {
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getBytes(index, dst.array(), dst.arrayOffset() + dstIndex, length);
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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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checkIndex(index, length);
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ByteBuffer tmpBuf = internalNioBuffer();
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index = idx(index);
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tmpBuf.clear().position(index).limit(index + length);
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tmpBuf.get(dst, dstIndex, 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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checkIndex(index);
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int bytesToCopy = Math.min(capacity() - index, dst.remaining());
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ByteBuffer tmpBuf = internalNioBuffer();
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index = idx(index);
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tmpBuf.clear().position(index).limit(index + bytesToCopy);
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dst.put(tmpBuf);
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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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checkIndex(index, length);
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if (length == 0) {
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return this;
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}
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byte[] tmp = new byte[length];
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ByteBuffer tmpBuf = internalNioBuffer();
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tmpBuf.clear().position(idx(index));
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tmpBuf.get(tmp);
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out.write(tmp);
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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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checkIndex(index, length);
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if (length == 0) {
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return 0;
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}
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ByteBuffer tmpBuf = internalNioBuffer();
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index = idx(index);
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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 ByteBuf setByte(int index, int value) {
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checkIndex(index);
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memory.put(idx(index), (byte) value);
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return this;
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}
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@Override
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public ByteBuf setShort(int index, int value) {
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checkIndex(index, 2);
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memory.putShort(idx(index), (short) value);
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return this;
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}
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@Override
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public ByteBuf setMedium(int index, int value) {
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checkIndex(index, 3);
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index = idx(index);
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memory.put(index, (byte) (value >>> 16));
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memory.put(index + 1, (byte) (value >>> 8));
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memory.put(index + 2, (byte) value);
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return this;
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}
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@Override
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public ByteBuf setInt(int index, int value) {
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checkIndex(index, 4);
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memory.putInt(idx(index), value);
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return this;
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}
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@Override
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public ByteBuf setLong(int index, long value) {
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checkIndex(index, 8);
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memory.putLong(idx(index), value);
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return this;
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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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checkIndex(index, length);
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if (src instanceof PooledDirectByteBuf) {
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PooledDirectByteBuf bbsrc = (PooledDirectByteBuf) src;
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ByteBuffer data = bbsrc.internalNioBuffer();
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srcIndex = bbsrc.idx(srcIndex);
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data.clear().position(srcIndex).limit(srcIndex + length);
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setBytes(index, data);
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} else if (src.hasArray()) {
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setBytes(index, src.array(), src.arrayOffset() + srcIndex, length);
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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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checkIndex(index, length);
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ByteBuffer tmpBuf = internalNioBuffer();
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index = idx(index);
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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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checkIndex(index);
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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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index = idx(index);
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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 int setBytes(int index, InputStream in, int length) throws IOException {
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checkIndex(index, length);
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byte[] tmp = new byte[length];
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int readBytes = in.read(tmp);
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if (readBytes <= 0) {
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return readBytes;
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}
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ByteBuffer tmpNioBuf = internalNioBuffer();
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tmpNioBuf.clear().position(idx(index));
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tmpNioBuf.put(tmp, 0, 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, ScatteringByteChannel in, int length) throws IOException {
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checkIndex(index, length);
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ByteBuffer tmpNioBuf = internalNioBuffer();
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index = idx(index);
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tmpNioBuf.clear().position(index).limit(index + length);
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try {
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return in.read(tmpNioBuf);
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} catch (ClosedChannelException e) {
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return -1;
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}
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}
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@Override
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public ByteBuf copy(int index, int length) {
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checkIndex(index, length);
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ByteBuf copy = alloc().directBuffer(capacity(), maxCapacity());
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copy.writeBytes(this, index, length);
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2013-01-10 10:43:20 +01:00
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return copy;
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2012-12-05 22:11:48 +01:00
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}
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@Override
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2012-12-14 04:20:33 +01:00
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public int nioBufferCount() {
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return 1;
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2012-12-05 22:11:48 +01:00
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}
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@Override
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public ByteBuffer nioBuffer(int index, int length) {
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checkIndex(index, length);
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index = idx(index);
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return ((ByteBuffer) internalNioBuffer().clear().position(index).limit(index + length)).slice();
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}
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@Override
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public ByteBuffer[] nioBuffers(int index, int length) {
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return new ByteBuffer[] { nioBuffer(index, length) };
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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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}
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