788 lines
31 KiB
Java
788 lines
31 KiB
Java
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/*
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* Copyright (C) 2014 The Android Open Source Project
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* Copyright (c) 1996, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.util.zip;
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import dalvik.annotation.optimization.ReachabilitySensitive;
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import dalvik.system.CloseGuard;
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import java.lang.ref.Cleaner.Cleanable;
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import java.lang.ref.Reference;
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import java.nio.ByteBuffer;
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import java.nio.ReadOnlyBufferException;
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import java.util.Objects;
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import jdk.internal.ref.CleanerFactory;
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import sun.nio.ch.DirectBuffer;
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/**
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* This class provides support for general purpose decompression using the
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* popular ZLIB compression library. The ZLIB compression library was
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* initially developed as part of the PNG graphics standard and is not
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* protected by patents. It is fully described in the specifications at
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* the <a href="package-summary.html#package-description">java.util.zip
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* package description</a>.
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* <p>
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* This class inflates sequences of ZLIB compressed bytes. The input byte
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* sequence is provided in either byte array or byte buffer, via one of the
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* {@code setInput()} methods. The output byte sequence is written to the
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* output byte array or byte buffer passed to the {@code deflate()} methods.
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* <p>
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* The following code fragment demonstrates a trivial compression
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* and decompression of a string using {@code Deflater} and
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* {@code Inflater}.
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*
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* <blockquote><pre>
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* try {
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* // Encode a String into bytes
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* String inputString = "blahblahblah\u20AC\u20AC";
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* byte[] input = inputString.getBytes("UTF-8");
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*
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* // Compress the bytes
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* byte[] output = new byte[100];
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* Deflater compresser = new Deflater();
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* compresser.setInput(input);
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* compresser.finish();
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* int compressedDataLength = compresser.deflate(output);
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*
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* // Decompress the bytes
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* Inflater decompresser = new Inflater();
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* decompresser.setInput(output, 0, compressedDataLength);
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* byte[] result = new byte[100];
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* int resultLength = decompresser.inflate(result);
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* decompresser.end();
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*
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* // Decode the bytes into a String
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* String outputString = new String(result, 0, resultLength, "UTF-8");
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* } catch (java.io.UnsupportedEncodingException ex) {
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* // handle
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* } catch (java.util.zip.DataFormatException ex) {
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* // handle
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* }
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* </pre></blockquote>
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*
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* @apiNote
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* To release resources used by this {@code Inflater}, the {@link #end()} method
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* should be called explicitly. Subclasses are responsible for the cleanup of resources
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* acquired by the subclass. Subclasses that override {@link #finalize()} in order
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* to perform cleanup should be modified to use alternative cleanup mechanisms such
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* as {@link java.lang.ref.Cleaner} and remove the overriding {@code finalize} method.
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*
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* @see Deflater
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* @author David Connelly
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* @since 1.1
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*
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*/
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public class Inflater {
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private final InflaterZStreamRef zsRef;
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private ByteBuffer input = ZipUtils.defaultBuf;
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private byte[] inputArray;
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private int inputPos, inputLim;
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private boolean finished;
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private boolean needDict;
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private long bytesRead;
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private long bytesWritten;
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// Android-added: CloseGuard support.
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@ReachabilitySensitive
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private final CloseGuard guard = CloseGuard.get();
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/*
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* These fields are used as an "out" parameter from JNI when a
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* DataFormatException is thrown during the inflate operation.
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*/
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private int inputConsumed;
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private int outputConsumed;
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// Android-removed: initIDs handled in register method.
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/*
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static {
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ZipUtils.loadLibrary();
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initIDs();
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}
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*/
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/**
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* Creates a new decompressor. If the parameter 'nowrap' is true then
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* the ZLIB header and checksum fields will not be used. This provides
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* compatibility with the compression format used by both GZIP and PKZIP.
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* <p>
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* Note: When using the 'nowrap' option it is also necessary to provide
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* an extra "dummy" byte as input. This is required by the ZLIB native
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* library in order to support certain optimizations.
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*
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* @param nowrap if true then support GZIP compatible compression
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*/
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public Inflater(boolean nowrap) {
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this.zsRef = new InflaterZStreamRef(this, init(nowrap));
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// Android-added: CloseGuard support.
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guard.open("end");
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}
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/**
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* Creates a new decompressor.
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*/
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public Inflater() {
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this(false);
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}
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/**
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* Sets input data for decompression.
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* <p>
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* One of the {@code setInput()} methods should be called whenever
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* {@code needsInput()} returns true indicating that more input data
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* is required.
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*
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* @param input the input data bytes
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* @param off the start offset of the input data
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* @param len the length of the input data
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* @see Inflater#needsInput
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*/
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public void setInput(byte[] input, int off, int len) {
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if (off < 0 || len < 0 || off > input.length - len) {
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throw new ArrayIndexOutOfBoundsException();
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}
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synchronized (zsRef) {
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this.input = null;
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this.inputArray = input;
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this.inputPos = off;
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this.inputLim = off + len;
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}
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}
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/**
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* Sets input data for decompression.
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* <p>
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* One of the {@code setInput()} methods should be called whenever
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* {@code needsInput()} returns true indicating that more input data
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* is required.
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*
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* @param input the input data bytes
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* @see Inflater#needsInput
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*/
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public void setInput(byte[] input) {
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setInput(input, 0, input.length);
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}
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/**
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* Sets input data for decompression.
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* <p>
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* One of the {@code setInput()} methods should be called whenever
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* {@code needsInput()} returns true indicating that more input data
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* is required.
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* <p>
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* The given buffer's position will be advanced as inflate
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* operations are performed, up to the buffer's limit.
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* The input buffer may be modified (refilled) between inflate
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* operations; doing so is equivalent to creating a new buffer
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* and setting it with this method.
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* <p>
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* Modifying the input buffer's contents, position, or limit
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* concurrently with an inflate operation will result in
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* undefined behavior, which may include incorrect operation
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* results or operation failure.
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*
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* @param input the input data bytes
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* @see Inflater#needsInput
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* @since 11
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*/
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public void setInput(ByteBuffer input) {
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Objects.requireNonNull(input);
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synchronized (zsRef) {
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this.input = input;
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this.inputArray = null;
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}
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}
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/**
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* Sets the preset dictionary to the given array of bytes. Should be
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* called when inflate() returns 0 and needsDictionary() returns true
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* indicating that a preset dictionary is required. The method getAdler()
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* can be used to get the Adler-32 value of the dictionary needed.
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* @param dictionary the dictionary data bytes
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* @param off the start offset of the data
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* @param len the length of the data
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* @see Inflater#needsDictionary
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* @see Inflater#getAdler
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*/
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public void setDictionary(byte[] dictionary, int off, int len) {
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if (off < 0 || len < 0 || off > dictionary.length - len) {
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throw new ArrayIndexOutOfBoundsException();
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}
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synchronized (zsRef) {
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ensureOpen();
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setDictionary(zsRef.address(), dictionary, off, len);
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needDict = false;
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}
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}
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/**
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* Sets the preset dictionary to the given array of bytes. Should be
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* called when inflate() returns 0 and needsDictionary() returns true
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* indicating that a preset dictionary is required. The method getAdler()
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* can be used to get the Adler-32 value of the dictionary needed.
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* @param dictionary the dictionary data bytes
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* @see Inflater#needsDictionary
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* @see Inflater#getAdler
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*/
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public void setDictionary(byte[] dictionary) {
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setDictionary(dictionary, 0, dictionary.length);
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}
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/**
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* Sets the preset dictionary to the bytes in the given buffer. Should be
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* called when inflate() returns 0 and needsDictionary() returns true
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* indicating that a preset dictionary is required. The method getAdler()
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* can be used to get the Adler-32 value of the dictionary needed.
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* <p>
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* The bytes in given byte buffer will be fully consumed by this method. On
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* return, its position will equal its limit.
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*
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* @param dictionary the dictionary data bytes
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* @see Inflater#needsDictionary
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* @see Inflater#getAdler
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* @since 11
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*/
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public void setDictionary(ByteBuffer dictionary) {
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synchronized (zsRef) {
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int position = dictionary.position();
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int remaining = Math.max(dictionary.limit() - position, 0);
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ensureOpen();
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if (dictionary.isDirect()) {
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long address = ((DirectBuffer) dictionary).address();
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try {
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setDictionaryBuffer(zsRef.address(), address + position, remaining);
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} finally {
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Reference.reachabilityFence(dictionary);
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}
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} else {
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byte[] array = ZipUtils.getBufferArray(dictionary);
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int offset = ZipUtils.getBufferOffset(dictionary);
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setDictionary(zsRef.address(), array, offset + position, remaining);
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}
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dictionary.position(position + remaining);
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needDict = false;
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}
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}
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/**
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* Returns the total number of bytes remaining in the input buffer.
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* This can be used to find out what bytes still remain in the input
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* buffer after decompression has finished.
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* @return the total number of bytes remaining in the input buffer
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*/
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public int getRemaining() {
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synchronized (zsRef) {
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ByteBuffer input = this.input;
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return input == null ? inputLim - inputPos : input.remaining();
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}
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}
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/**
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* Returns true if no data remains in the input buffer. This can
|
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* be used to determine if one of the {@code setInput()} methods should be
|
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* called in order to provide more input.
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*
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* @return true if no data remains in the input buffer
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*/
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public boolean needsInput() {
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synchronized (zsRef) {
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ByteBuffer input = this.input;
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return input == null ? inputLim == inputPos : ! input.hasRemaining();
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}
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}
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/**
|
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* Returns true if a preset dictionary is needed for decompression.
|
||
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* @return true if a preset dictionary is needed for decompression
|
||
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* @see Inflater#setDictionary
|
||
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*/
|
||
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public boolean needsDictionary() {
|
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synchronized (zsRef) {
|
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return needDict;
|
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}
|
||
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}
|
||
|
|
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||
|
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/**
|
||
|
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* Returns true if the end of the compressed data stream has been
|
||
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* reached.
|
||
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* @return true if the end of the compressed data stream has been
|
||
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* reached
|
||
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*/
|
||
|
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public boolean finished() {
|
||
|
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synchronized (zsRef) {
|
||
|
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return finished;
|
||
|
|
}
|
||
|
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}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Uncompresses bytes into specified buffer. Returns actual number
|
||
|
|
* of bytes uncompressed. A return value of 0 indicates that
|
||
|
|
* needsInput() or needsDictionary() should be called in order to
|
||
|
|
* determine if more input data or a preset dictionary is required.
|
||
|
|
* In the latter case, getAdler() can be used to get the Adler-32
|
||
|
|
* value of the dictionary required.
|
||
|
|
* <p>
|
||
|
|
* If the {@link #setInput(ByteBuffer)} method was called to provide a buffer
|
||
|
|
* for input, the input buffer's position will be advanced by the number of bytes
|
||
|
|
* consumed by this operation, even in the event that a {@link DataFormatException}
|
||
|
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* is thrown.
|
||
|
|
* <p>
|
||
|
|
* The {@linkplain #getRemaining() remaining byte count} will be reduced by
|
||
|
|
* the number of consumed input bytes. If the {@link #setInput(ByteBuffer)}
|
||
|
|
* method was called to provide a buffer for input, the input buffer's position
|
||
|
|
* will be advanced the number of consumed bytes.
|
||
|
|
* <p>
|
||
|
|
* These byte totals, as well as
|
||
|
|
* the {@linkplain #getBytesRead() total bytes read}
|
||
|
|
* and the {@linkplain #getBytesWritten() total bytes written}
|
||
|
|
* values, will be updated even in the event that a {@link DataFormatException}
|
||
|
|
* is thrown to reflect the amount of data consumed and produced before the
|
||
|
|
* exception occurred.
|
||
|
|
*
|
||
|
|
* @param output the buffer for the uncompressed data
|
||
|
|
* @param off the start offset of the data
|
||
|
|
* @param len the maximum number of uncompressed bytes
|
||
|
|
* @return the actual number of uncompressed bytes
|
||
|
|
* @throws DataFormatException if the compressed data format is invalid
|
||
|
|
* @see Inflater#needsInput
|
||
|
|
* @see Inflater#needsDictionary
|
||
|
|
*/
|
||
|
|
public int inflate(byte[] output, int off, int len)
|
||
|
|
throws DataFormatException
|
||
|
|
{
|
||
|
|
if (off < 0 || len < 0 || off > output.length - len) {
|
||
|
|
throw new ArrayIndexOutOfBoundsException();
|
||
|
|
}
|
||
|
|
synchronized (zsRef) {
|
||
|
|
ensureOpen();
|
||
|
|
ByteBuffer input = this.input;
|
||
|
|
long result;
|
||
|
|
int inputPos;
|
||
|
|
try {
|
||
|
|
if (input == null) {
|
||
|
|
inputPos = this.inputPos;
|
||
|
|
try {
|
||
|
|
result = inflateBytesBytes(zsRef.address(),
|
||
|
|
inputArray, inputPos, inputLim - inputPos,
|
||
|
|
output, off, len);
|
||
|
|
} catch (DataFormatException e) {
|
||
|
|
this.inputPos = inputPos + inputConsumed;
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
inputPos = input.position();
|
||
|
|
try {
|
||
|
|
int inputRem = Math.max(input.limit() - inputPos, 0);
|
||
|
|
if (input.isDirect()) {
|
||
|
|
try {
|
||
|
|
long inputAddress = ((DirectBuffer) input).address();
|
||
|
|
result = inflateBufferBytes(zsRef.address(),
|
||
|
|
inputAddress + inputPos, inputRem,
|
||
|
|
output, off, len);
|
||
|
|
} finally {
|
||
|
|
Reference.reachabilityFence(input);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
byte[] inputArray = ZipUtils.getBufferArray(input);
|
||
|
|
int inputOffset = ZipUtils.getBufferOffset(input);
|
||
|
|
result = inflateBytesBytes(zsRef.address(),
|
||
|
|
inputArray, inputOffset + inputPos, inputRem,
|
||
|
|
output, off, len);
|
||
|
|
}
|
||
|
|
} catch (DataFormatException e) {
|
||
|
|
input.position(inputPos + inputConsumed);
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} catch (DataFormatException e) {
|
||
|
|
bytesRead += inputConsumed;
|
||
|
|
inputConsumed = 0;
|
||
|
|
int written = outputConsumed;
|
||
|
|
bytesWritten += written;
|
||
|
|
outputConsumed = 0;
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
int read = (int) (result & 0x7fff_ffffL);
|
||
|
|
int written = (int) (result >>> 31 & 0x7fff_ffffL);
|
||
|
|
if ((result >>> 62 & 1) != 0) {
|
||
|
|
finished = true;
|
||
|
|
}
|
||
|
|
if ((result >>> 63 & 1) != 0) {
|
||
|
|
needDict = true;
|
||
|
|
}
|
||
|
|
if (input != null) {
|
||
|
|
input.position(inputPos + read);
|
||
|
|
} else {
|
||
|
|
this.inputPos = inputPos + read;
|
||
|
|
}
|
||
|
|
bytesWritten += written;
|
||
|
|
bytesRead += read;
|
||
|
|
return written;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Uncompresses bytes into specified buffer. Returns actual number
|
||
|
|
* of bytes uncompressed. A return value of 0 indicates that
|
||
|
|
* needsInput() or needsDictionary() should be called in order to
|
||
|
|
* determine if more input data or a preset dictionary is required.
|
||
|
|
* In the latter case, getAdler() can be used to get the Adler-32
|
||
|
|
* value of the dictionary required.
|
||
|
|
* <p>
|
||
|
|
* The {@linkplain #getRemaining() remaining byte count} will be reduced by
|
||
|
|
* the number of consumed input bytes. If the {@link #setInput(ByteBuffer)}
|
||
|
|
* method was called to provide a buffer for input, the input buffer's position
|
||
|
|
* will be advanced the number of consumed bytes.
|
||
|
|
* <p>
|
||
|
|
* These byte totals, as well as
|
||
|
|
* the {@linkplain #getBytesRead() total bytes read}
|
||
|
|
* and the {@linkplain #getBytesWritten() total bytes written}
|
||
|
|
* values, will be updated even in the event that a {@link DataFormatException}
|
||
|
|
* is thrown to reflect the amount of data consumed and produced before the
|
||
|
|
* exception occurred.
|
||
|
|
*
|
||
|
|
* @param output the buffer for the uncompressed data
|
||
|
|
* @return the actual number of uncompressed bytes
|
||
|
|
* @throws DataFormatException if the compressed data format is invalid
|
||
|
|
* @see Inflater#needsInput
|
||
|
|
* @see Inflater#needsDictionary
|
||
|
|
*/
|
||
|
|
public int inflate(byte[] output) throws DataFormatException {
|
||
|
|
return inflate(output, 0, output.length);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Uncompresses bytes into specified buffer. Returns actual number
|
||
|
|
* of bytes uncompressed. A return value of 0 indicates that
|
||
|
|
* needsInput() or needsDictionary() should be called in order to
|
||
|
|
* determine if more input data or a preset dictionary is required.
|
||
|
|
* In the latter case, getAdler() can be used to get the Adler-32
|
||
|
|
* value of the dictionary required.
|
||
|
|
* <p>
|
||
|
|
* On success, the position of the given {@code output} byte buffer will be
|
||
|
|
* advanced by as many bytes as were produced by the operation, which is equal
|
||
|
|
* to the number returned by this method. Note that the position of the
|
||
|
|
* {@code output} buffer will be advanced even in the event that a
|
||
|
|
* {@link DataFormatException} is thrown.
|
||
|
|
* <p>
|
||
|
|
* The {@linkplain #getRemaining() remaining byte count} will be reduced by
|
||
|
|
* the number of consumed input bytes. If the {@link #setInput(ByteBuffer)}
|
||
|
|
* method was called to provide a buffer for input, the input buffer's position
|
||
|
|
* will be advanced the number of consumed bytes.
|
||
|
|
* <p>
|
||
|
|
* These byte totals, as well as
|
||
|
|
* the {@linkplain #getBytesRead() total bytes read}
|
||
|
|
* and the {@linkplain #getBytesWritten() total bytes written}
|
||
|
|
* values, will be updated even in the event that a {@link DataFormatException}
|
||
|
|
* is thrown to reflect the amount of data consumed and produced before the
|
||
|
|
* exception occurred.
|
||
|
|
*
|
||
|
|
* @param output the buffer for the uncompressed data
|
||
|
|
* @return the actual number of uncompressed bytes
|
||
|
|
* @throws DataFormatException if the compressed data format is invalid
|
||
|
|
* @throws ReadOnlyBufferException if the given output buffer is read-only
|
||
|
|
* @see Inflater#needsInput
|
||
|
|
* @see Inflater#needsDictionary
|
||
|
|
* @since 11
|
||
|
|
*/
|
||
|
|
public int inflate(ByteBuffer output) throws DataFormatException {
|
||
|
|
if (output.isReadOnly()) {
|
||
|
|
throw new ReadOnlyBufferException();
|
||
|
|
}
|
||
|
|
synchronized (zsRef) {
|
||
|
|
ensureOpen();
|
||
|
|
ByteBuffer input = this.input;
|
||
|
|
long result;
|
||
|
|
int inputPos;
|
||
|
|
int outputPos = output.position();
|
||
|
|
int outputRem = Math.max(output.limit() - outputPos, 0);
|
||
|
|
try {
|
||
|
|
if (input == null) {
|
||
|
|
inputPos = this.inputPos;
|
||
|
|
try {
|
||
|
|
if (output.isDirect()) {
|
||
|
|
long outputAddress = ((DirectBuffer) output).address();
|
||
|
|
try {
|
||
|
|
result = inflateBytesBuffer(zsRef.address(),
|
||
|
|
inputArray, inputPos, inputLim - inputPos,
|
||
|
|
outputAddress + outputPos, outputRem);
|
||
|
|
} finally {
|
||
|
|
Reference.reachabilityFence(output);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
byte[] outputArray = ZipUtils.getBufferArray(output);
|
||
|
|
int outputOffset = ZipUtils.getBufferOffset(output);
|
||
|
|
result = inflateBytesBytes(zsRef.address(),
|
||
|
|
inputArray, inputPos, inputLim - inputPos,
|
||
|
|
outputArray, outputOffset + outputPos, outputRem);
|
||
|
|
}
|
||
|
|
} catch (DataFormatException e) {
|
||
|
|
this.inputPos = inputPos + inputConsumed;
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
inputPos = input.position();
|
||
|
|
int inputRem = Math.max(input.limit() - inputPos, 0);
|
||
|
|
try {
|
||
|
|
if (input.isDirect()) {
|
||
|
|
long inputAddress = ((DirectBuffer) input).address();
|
||
|
|
try {
|
||
|
|
if (output.isDirect()) {
|
||
|
|
long outputAddress = ((DirectBuffer) output).address();
|
||
|
|
try {
|
||
|
|
result = inflateBufferBuffer(zsRef.address(),
|
||
|
|
inputAddress + inputPos, inputRem,
|
||
|
|
outputAddress + outputPos, outputRem);
|
||
|
|
} finally {
|
||
|
|
Reference.reachabilityFence(output);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
byte[] outputArray = ZipUtils.getBufferArray(output);
|
||
|
|
int outputOffset = ZipUtils.getBufferOffset(output);
|
||
|
|
result = inflateBufferBytes(zsRef.address(),
|
||
|
|
inputAddress + inputPos, inputRem,
|
||
|
|
outputArray, outputOffset + outputPos, outputRem);
|
||
|
|
}
|
||
|
|
} finally {
|
||
|
|
Reference.reachabilityFence(input);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
byte[] inputArray = ZipUtils.getBufferArray(input);
|
||
|
|
int inputOffset = ZipUtils.getBufferOffset(input);
|
||
|
|
if (output.isDirect()) {
|
||
|
|
long outputAddress = ((DirectBuffer) output).address();
|
||
|
|
try {
|
||
|
|
result = inflateBytesBuffer(zsRef.address(),
|
||
|
|
inputArray, inputOffset + inputPos, inputRem,
|
||
|
|
outputAddress + outputPos, outputRem);
|
||
|
|
} finally {
|
||
|
|
Reference.reachabilityFence(output);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
byte[] outputArray = ZipUtils.getBufferArray(output);
|
||
|
|
int outputOffset = ZipUtils.getBufferOffset(output);
|
||
|
|
result = inflateBytesBytes(zsRef.address(),
|
||
|
|
inputArray, inputOffset + inputPos, inputRem,
|
||
|
|
outputArray, outputOffset + outputPos, outputRem);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} catch (DataFormatException e) {
|
||
|
|
input.position(inputPos + inputConsumed);
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} catch (DataFormatException e) {
|
||
|
|
bytesRead += inputConsumed;
|
||
|
|
inputConsumed = 0;
|
||
|
|
int written = outputConsumed;
|
||
|
|
output.position(outputPos + written);
|
||
|
|
bytesWritten += written;
|
||
|
|
outputConsumed = 0;
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
int read = (int) (result & 0x7fff_ffffL);
|
||
|
|
int written = (int) (result >>> 31 & 0x7fff_ffffL);
|
||
|
|
if ((result >>> 62 & 1) != 0) {
|
||
|
|
finished = true;
|
||
|
|
}
|
||
|
|
if ((result >>> 63 & 1) != 0) {
|
||
|
|
needDict = true;
|
||
|
|
}
|
||
|
|
if (input != null) {
|
||
|
|
input.position(inputPos + read);
|
||
|
|
} else {
|
||
|
|
this.inputPos = inputPos + read;
|
||
|
|
}
|
||
|
|
// Note: this method call also serves to keep the byteBuffer ref alive
|
||
|
|
output.position(outputPos + written);
|
||
|
|
bytesWritten += written;
|
||
|
|
bytesRead += read;
|
||
|
|
return written;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the ADLER-32 value of the uncompressed data.
|
||
|
|
* @return the ADLER-32 value of the uncompressed data
|
||
|
|
*/
|
||
|
|
public int getAdler() {
|
||
|
|
synchronized (zsRef) {
|
||
|
|
ensureOpen();
|
||
|
|
return getAdler(zsRef.address());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the total number of compressed bytes input so far.
|
||
|
|
*
|
||
|
|
* <p>Since the number of bytes may be greater than
|
||
|
|
* Integer.MAX_VALUE, the {@link #getBytesRead()} method is now
|
||
|
|
* the preferred means of obtaining this information.</p>
|
||
|
|
*
|
||
|
|
* @return the total number of compressed bytes input so far
|
||
|
|
*/
|
||
|
|
public int getTotalIn() {
|
||
|
|
return (int) getBytesRead();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the total number of compressed bytes input so far.
|
||
|
|
*
|
||
|
|
* @return the total (non-negative) number of compressed bytes input so far
|
||
|
|
* @since 1.5
|
||
|
|
*/
|
||
|
|
public long getBytesRead() {
|
||
|
|
synchronized (zsRef) {
|
||
|
|
ensureOpen();
|
||
|
|
return bytesRead;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the total number of uncompressed bytes output so far.
|
||
|
|
*
|
||
|
|
* <p>Since the number of bytes may be greater than
|
||
|
|
* Integer.MAX_VALUE, the {@link #getBytesWritten()} method is now
|
||
|
|
* the preferred means of obtaining this information.</p>
|
||
|
|
*
|
||
|
|
* @return the total number of uncompressed bytes output so far
|
||
|
|
*/
|
||
|
|
public int getTotalOut() {
|
||
|
|
return (int) getBytesWritten();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the total number of uncompressed bytes output so far.
|
||
|
|
*
|
||
|
|
* @return the total (non-negative) number of uncompressed bytes output so far
|
||
|
|
* @since 1.5
|
||
|
|
*/
|
||
|
|
public long getBytesWritten() {
|
||
|
|
synchronized (zsRef) {
|
||
|
|
ensureOpen();
|
||
|
|
return bytesWritten;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Resets inflater so that a new set of input data can be processed.
|
||
|
|
*/
|
||
|
|
public void reset() {
|
||
|
|
synchronized (zsRef) {
|
||
|
|
ensureOpen();
|
||
|
|
reset(zsRef.address());
|
||
|
|
// Android-added: CloseGuard support.
|
||
|
|
guard.close();
|
||
|
|
input = ZipUtils.defaultBuf;
|
||
|
|
inputArray = null;
|
||
|
|
finished = false;
|
||
|
|
needDict = false;
|
||
|
|
bytesRead = bytesWritten = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Closes the decompressor and discards any unprocessed input.
|
||
|
|
*
|
||
|
|
* This method should be called when the decompressor is no longer
|
||
|
|
* being used. Once this method is called, the behavior of the
|
||
|
|
* Inflater object is undefined.
|
||
|
|
*/
|
||
|
|
public void end() {
|
||
|
|
synchronized (zsRef) {
|
||
|
|
zsRef.clean();
|
||
|
|
// Android-added: CloseGuard support.
|
||
|
|
guard.close();
|
||
|
|
input = ZipUtils.defaultBuf;
|
||
|
|
inputArray = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
private void ensureOpen () {
|
||
|
|
assert Thread.holdsLock(zsRef);
|
||
|
|
if (zsRef.address() == 0)
|
||
|
|
throw new NullPointerException("Inflater has been closed");
|
||
|
|
}
|
||
|
|
|
||
|
|
// Android-changed: initIDs handled in register method.
|
||
|
|
// private native static void initIDs();
|
||
|
|
private static native long init(boolean nowrap);
|
||
|
|
private static native void setDictionary(long addr, byte[] b, int off,
|
||
|
|
int len);
|
||
|
|
private static native void setDictionaryBuffer(long addr, long bufAddress, int len);
|
||
|
|
private native long inflateBytesBytes(long addr,
|
||
|
|
byte[] inputArray, int inputOff, int inputLen,
|
||
|
|
byte[] outputArray, int outputOff, int outputLen) throws DataFormatException;
|
||
|
|
private native long inflateBytesBuffer(long addr,
|
||
|
|
byte[] inputArray, int inputOff, int inputLen,
|
||
|
|
long outputAddress, int outputLen) throws DataFormatException;
|
||
|
|
private native long inflateBufferBytes(long addr,
|
||
|
|
long inputAddress, int inputLen,
|
||
|
|
byte[] outputArray, int outputOff, int outputLen) throws DataFormatException;
|
||
|
|
private native long inflateBufferBuffer(long addr,
|
||
|
|
long inputAddress, int inputLen,
|
||
|
|
long outputAddress, int outputLen) throws DataFormatException;
|
||
|
|
private static native int getAdler(long addr);
|
||
|
|
private static native void reset(long addr);
|
||
|
|
private static native void end(long addr);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A reference to the native zlib's z_stream structure. It also
|
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* serves as the "cleaner" to clean up the native resource when
|
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* the Inflater is ended, closed or cleaned.
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*/
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|
static class InflaterZStreamRef implements Runnable {
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private long address;
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||
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|
private final Cleanable cleanable;
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||
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||
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|
private InflaterZStreamRef(Inflater owner, long addr) {
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||
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|
this.cleanable = (owner != null) ? CleanerFactory.cleaner().register(owner, this) : null;
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|
this.address = addr;
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||
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|
}
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||
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||
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|
long address() {
|
||
|
|
return address;
|
||
|
|
}
|
||
|
|
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||
|
|
void clean() {
|
||
|
|
cleanable.clean();
|
||
|
|
}
|
||
|
|
|
||
|
|
public synchronized void run() {
|
||
|
|
long addr = address;
|
||
|
|
address = 0;
|
||
|
|
if (addr != 0) {
|
||
|
|
end(addr);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|