496 lines
12 KiB
Java
496 lines
12 KiB
Java
/*
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* Copyright 2013 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 io.net5.util.internal.StringUtil;
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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.ReadOnlyBufferException;
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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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* Read-only ByteBuf which wraps a read-only ByteBuffer.
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*/
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class ReadOnlyByteBufferBuf extends AbstractReferenceCountedByteBuf {
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protected final ByteBuffer buffer;
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private final ByteBufAllocator allocator;
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private ByteBuffer tmpNioBuf;
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ReadOnlyByteBufferBuf(ByteBufAllocator allocator, ByteBuffer buffer) {
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super(buffer.remaining());
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if (!buffer.isReadOnly()) {
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throw new IllegalArgumentException("must be a readonly buffer: " + StringUtil.simpleClassName(buffer));
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}
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this.allocator = allocator;
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this.buffer = buffer.slice().order(ByteOrder.BIG_ENDIAN);
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writerIndex(this.buffer.limit());
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}
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@Override
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protected void deallocate() { }
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@Override
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public boolean isWritable() {
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return false;
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}
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@Override
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public boolean isWritable(int numBytes) {
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return false;
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}
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@Override
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public ByteBuf ensureWritable(int minWritableBytes) {
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throw new ReadOnlyBufferException();
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}
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@Override
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public int ensureWritable(int minWritableBytes, boolean force) {
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return 1;
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}
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@Override
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public int writableBytes() {
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return 0;
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}
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@Override
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public int maxWritableBytes() {
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return 0;
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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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public short getShortLE(int index) {
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ensureAccessible();
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return _getShortLE(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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public int getUnsignedMediumLE(int index) {
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ensureAccessible();
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return _getUnsignedMediumLE(index);
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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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public int getIntLE(int index) {
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ensureAccessible();
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return _getIntLE(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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public long getLongLE(int index) {
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ensureAccessible();
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return _getLongLE(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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checkDstIndex(index, length, dstIndex, dst.length);
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ByteBuffer tmpBuf = internalNioBuffer();
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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, dst.remaining());
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ByteBuffer tmpBuf = internalNioBuffer();
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tmpBuf.clear().position(index).limit(index + dst.remaining());
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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 setByte(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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protected void _setByte(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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public ByteBuf setShort(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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protected void _setShort(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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public ByteBuf setShortLE(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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protected void _setShortLE(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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public ByteBuf setMedium(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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protected void _setMedium(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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public ByteBuf setMediumLE(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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protected void _setMediumLE(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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public ByteBuf setInt(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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protected void _setInt(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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public ByteBuf setIntLE(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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protected void _setIntLE(int index, int value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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public ByteBuf setLong(int index, long value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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protected void _setLong(int index, long value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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public ByteBuf setLongLE(int index, long value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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protected void _setLongLE(int index, long value) {
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throw new ReadOnlyBufferException();
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}
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@Override
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public int capacity() {
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return maxCapacity();
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}
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@Override
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public ByteBuf capacity(int newCapacity) {
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throw new ReadOnlyBufferException();
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}
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@Override
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public ByteBufAllocator alloc() {
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return allocator;
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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 ByteBuf unwrap() {
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return null;
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}
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@Override
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public boolean isReadOnly() {
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return buffer.isReadOnly();
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}
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@Override
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public boolean isDirect() {
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return buffer.isDirect();
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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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ensureAccessible();
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if (length == 0) {
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return this;
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}
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if (buffer.hasArray()) {
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out.write(buffer.array(), index + buffer.arrayOffset(), length);
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} else {
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byte[] tmp = ByteBufUtil.threadLocalTempArray(length);
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ByteBuffer tmpBuf = internalNioBuffer();
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tmpBuf.clear().position(index);
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tmpBuf.get(tmp, 0, length);
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out.write(tmp, 0, 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 int getBytes(int index, GatheringByteChannel out, int length) 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 = internalNioBuffer();
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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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ensureAccessible();
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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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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 ByteBuf setBytes(int index, ByteBuf src, int srcIndex, int length) {
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throw new ReadOnlyBufferException();
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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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throw new ReadOnlyBufferException();
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}
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@Override
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public ByteBuf setBytes(int index, ByteBuffer src) {
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throw new ReadOnlyBufferException();
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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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throw new ReadOnlyBufferException();
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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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throw new ReadOnlyBufferException();
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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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throw new ReadOnlyBufferException();
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}
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protected final ByteBuffer internalNioBuffer() {
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ByteBuffer tmpNioBuf = this.tmpNioBuf;
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if (tmpNioBuf == null) {
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this.tmpNioBuf = tmpNioBuf = buffer.duplicate();
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}
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return tmpNioBuf;
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}
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@Override
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public ByteBuf copy(int index, int length) {
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ensureAccessible();
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ByteBuffer src;
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try {
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src = (ByteBuffer) internalNioBuffer().clear().position(index).limit(index + length);
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} catch (IllegalArgumentException ignored) {
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throw new IndexOutOfBoundsException("Too many bytes to read - Need " + (index + length));
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}
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ByteBuf dst = src.isDirect() ? alloc().directBuffer(length) : alloc().heapBuffer(length);
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dst.writeBytes(src);
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return dst;
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}
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@Override
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public int nioBufferCount() {
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return 1;
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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 ByteBuffer nioBuffer(int index, int length) {
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checkIndex(index, length);
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return (ByteBuffer) buffer.duplicate().position(index).limit(index + length);
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}
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@Override
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public ByteBuffer internalNioBuffer(int index, int length) {
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ensureAccessible();
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return (ByteBuffer) internalNioBuffer().clear().position(index).limit(index + length);
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}
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@Override
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public final boolean isContiguous() {
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return true;
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}
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@Override
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public boolean hasArray() {
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return buffer.hasArray();
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}
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@Override
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public byte[] array() {
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return buffer.array();
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}
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@Override
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public int arrayOffset() {
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return buffer.arrayOffset();
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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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}
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