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6341887: java.util.zip: Add ByteBuffer methods to Inflater/Deflater

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Reviewed-by: alanb
This commit is contained in:
David M Lloyd 2018-04-19 10:33:35 -07:00 • committed by Xueming Shen
parent 9303a8a180
commit 883d41fefc
7 changed files with 1378 additions and 341 deletions
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472
src/java.base/share/classes/java/util/zip/Deflater.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 1996, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1996, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -26,7 +26,13 @@
package java.util.zip;
import java.lang.ref.Cleaner.Cleanable;
import java.lang.ref.Reference;
import java.nio.ByteBuffer;
import java.nio.ReadOnlyBufferException;
import java.util.Objects;
import jdk.internal.ref.CleanerFactory;
import sun.nio.ch.DirectBuffer;
/**
* This class provides support for general purpose compression using the
@ -35,8 +41,14 @@ import jdk.internal.ref.CleanerFactory;
* protected by patents. It is fully described in the specifications at
* the <a href="package-summary.html#package.description">java.util.zip
* package description</a>.
*
* <p>The following code fragment demonstrates a trivial compression
* <p>
* This class deflates sequences of bytes into ZLIB compressed data format.
* The input byte sequence is provided in either byte array or byte buffer,
* via one of the {@code setInput()} methods. The output byte sequence is
* written to the output byte array or byte buffer passed to the
* {@code deflate()} methods.
* <p>
* The following code fragment demonstrates a trivial compression
* and decompression of a string using {@code Deflater} and
* {@code Inflater}.
*
@ -92,8 +104,9 @@ import jdk.internal.ref.CleanerFactory;
public class Deflater {
private final DeflaterZStreamRef zsRef;
private byte[] buf = new byte[0];
private int off, len;
private ByteBuffer input = ZipUtils.defaultBuf;
private byte[] inputArray;
private int inputPos, inputLim;
private int level, strategy;
private boolean setParams;
private boolean finish, finished;
@ -170,9 +183,14 @@ public class Deflater {
*/
public static final int FULL_FLUSH = 3;
/**
* Flush mode to use at the end of output. Can only be provided by the
* user by way of {@link #finish()}.
*/
private static final int FINISH = 4;
static {
ZipUtils.loadLibrary();
initIDs();
}
/**
@ -208,35 +226,71 @@ public class Deflater {
}
/**
* Sets input data for compression. This should be called whenever
* needsInput() returns true indicating that more input data is required.
* @param b the input data bytes
* Sets input data for compression.
* <p>
* One of the {@code setInput()} methods should be called whenever
* {@code needsInput()} returns true indicating that more input data
* is required.
* <p>
* @param input the input data bytes
* @param off the start offset of the data
* @param len the length of the data
* @see Deflater#needsInput
*/
public void setInput(byte[] b, int off, int len) {
if (b== null) {
throw new NullPointerException();
}
if (off < 0 || len < 0 || off > b.length - len) {
public void setInput(byte[] input, int off, int len) {
if (off < 0 || len < 0 || off > input.length - len) {
throw new ArrayIndexOutOfBoundsException();
}
synchronized (zsRef) {
this.buf = b;
this.off = off;
this.len = len;
this.input = null;
this.inputArray = input;
this.inputPos = off;
this.inputLim = off + len;
}
}
/**
* Sets input data for compression. This should be called whenever
* needsInput() returns true indicating that more input data is required.
* @param b the input data bytes
* Sets input data for compression.
* <p>
* One of the {@code setInput()} methods should be called whenever
* {@code needsInput()} returns true indicating that more input data
* is required.
* <p>
* @param input the input data bytes
* @see Deflater#needsInput
*/
public void setInput(byte[] b) {
setInput(b, 0, b.length);
public void setInput(byte[] input) {
setInput(input, 0, input.length);
}
/**
* Sets input data for compression.
* <p>
* One of the {@code setInput()} methods should be called whenever
* {@code needsInput()} returns true indicating that more input data
* is required.
* <p>
* The given buffer's position will be advanced as deflate
* operations are performed, up to the buffer's limit.
* The input buffer may be modified (refilled) between deflate
* operations; doing so is equivalent to creating a new buffer
* and setting it with this method.
* <p>
* Modifying the input buffer's contents, position, or limit
* concurrently with an deflate operation will result in
* undefined behavior, which may include incorrect operation
* results or operation failure.
*
* @param input the input data bytes
* @see Deflater#needsInput
* @since 11
*/
public void setInput(ByteBuffer input) {
Objects.requireNonNull(input);
synchronized (zsRef) {
this.input = input;
this.inputArray = null;
}
}
/**
@ -245,22 +299,19 @@ public class Deflater {
* uncompressed with Inflater.inflate(), Inflater.getAdler() can be called
* in order to get the Adler-32 value of the dictionary required for
* decompression.
* @param b the dictionary data bytes
* @param dictionary the dictionary data bytes
* @param off the start offset of the data
* @param len the length of the data
* @see Inflater#inflate
* @see Inflater#getAdler
*/
public void setDictionary(byte[] b, int off, int len) {
if (b == null) {
throw new NullPointerException();
}
if (off < 0 || len < 0 || off > b.length - len) {
public void setDictionary(byte[] dictionary, int off, int len) {
if (off < 0 || len < 0 || off > dictionary.length - len) {
throw new ArrayIndexOutOfBoundsException();
}
synchronized (zsRef) {
ensureOpen();
setDictionary(zsRef.address(), b, off, len);
setDictionary(zsRef.address(), dictionary, off, len);
}
}
@ -270,12 +321,47 @@ public class Deflater {
* uncompressed with Inflater.inflate(), Inflater.getAdler() can be called
* in order to get the Adler-32 value of the dictionary required for
* decompression.
* @param b the dictionary data bytes
* @param dictionary the dictionary data bytes
* @see Inflater#inflate
* @see Inflater#getAdler
*/
public void setDictionary(byte[] b) {
setDictionary(b, 0, b.length);
public void setDictionary(byte[] dictionary) {
setDictionary(dictionary, 0, dictionary.length);
}
/**
* Sets preset dictionary for compression. A preset dictionary is used
* when the history buffer can be predetermined. When the data is later
* uncompressed with Inflater.inflate(), Inflater.getAdler() can be called
* in order to get the Adler-32 value of the dictionary required for
* decompression.
* <p>
* The bytes in given byte buffer will be fully consumed by this method. On
* return, its position will equal its limit.
*
* @param dictionary the dictionary data bytes
* @see Inflater#inflate
* @see Inflater#getAdler
*/
public void setDictionary(ByteBuffer dictionary) {
synchronized (zsRef) {
int position = dictionary.position();
int remaining = Math.max(dictionary.limit() - position, 0);
ensureOpen();
if (dictionary.isDirect()) {
long address = ((DirectBuffer) dictionary).address();
try {
setDictionaryBuffer(zsRef.address(), address + position, remaining);
} finally {
Reference.reachabilityFence(dictionary);
}
} else {
byte[] array = ZipUtils.getBufferArray(dictionary);
int offset = ZipUtils.getBufferOffset(dictionary);
setDictionary(zsRef.address(), array, offset + position, remaining);
}
dictionary.position(position + remaining);
}
}
/**
@ -331,14 +417,17 @@ public class Deflater {
}
/**
* Returns true if the input data buffer is empty and setInput()
* should be called in order to provide more input.
* Returns true if no data remains in the input buffer. This can
* be used to determine if one of the {@code setInput()} methods should be
* called in order to provide more input.
*
* @return true if the input data buffer is empty and setInput()
* should be called in order to provide more input
*/
public boolean needsInput() {
synchronized (zsRef) {
return len <= 0;
ByteBuffer input = this.input;
return input == null ? inputLim == inputPos : ! input.hasRemaining();
}
}
@ -375,14 +464,14 @@ public class Deflater {
* yields the same result as the invocation of
* {@code deflater.deflate(b, off, len, Deflater.NO_FLUSH)}.
*
* @param b the buffer for the compressed data
* @param output the buffer for the compressed data
* @param off the start offset of the data
* @param len the maximum number of bytes of compressed data
* @return the actual number of bytes of compressed data written to the
* output buffer
*/
public int deflate(byte[] b, int off, int len) {
return deflate(b, off, len, NO_FLUSH);
public int deflate(byte[] output, int off, int len) {
return deflate(output, off, len, NO_FLUSH);
}
/**
@ -396,12 +485,32 @@ public class Deflater {
* yields the same result as the invocation of
* {@code deflater.deflate(b, 0, b.length, Deflater.NO_FLUSH)}.
*
* @param b the buffer for the compressed data
* @param output the buffer for the compressed data
* @return the actual number of bytes of compressed data written to the
* output buffer
*/
public int deflate(byte[] b) {
return deflate(b, 0, b.length, NO_FLUSH);
public int deflate(byte[] output) {
return deflate(output, 0, output.length, NO_FLUSH);
}
/**
* Compresses the input data and fills specified buffer with compressed
* data. Returns actual number of bytes of compressed data. A return value
* of 0 indicates that {@link #needsInput() needsInput} should be called
* in order to determine if more input data is required.
*
* <p>This method uses {@link #NO_FLUSH} as its compression flush mode.
* An invocation of this method of the form {@code deflater.deflate(output)}
* yields the same result as the invocation of
* {@code deflater.deflate(output, Deflater.NO_FLUSH)}.
*
* @param output the buffer for the compressed data
* @return the actual number of bytes of compressed data written to the
* output buffer
* @since 11
*/
public int deflate(ByteBuffer output) {
return deflate(output, NO_FLUSH);
}
/**
@ -441,7 +550,11 @@ public class Deflater {
* repeatedly output to the output buffer every time this method is
* invoked.
*
* @param b the buffer for the compressed data
* <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.
*
* @param output the buffer for the compressed data
* @param off the start offset of the data
* @param len the maximum number of bytes of compressed data
* @param flush the compression flush mode
@ -451,25 +564,248 @@ public class Deflater {
* @throws IllegalArgumentException if the flush mode is invalid
* @since 1.7
*/
public int deflate(byte[] b, int off, int len, int flush) {
if (b == null) {
throw new NullPointerException();
}
if (off < 0 || len < 0 || off > b.length - len) {
public int deflate(byte[] output, int off, int len, int flush) {
if (off < 0 || len < 0 || off > output.length - len) {
throw new ArrayIndexOutOfBoundsException();
}
if (flush != NO_FLUSH && flush != SYNC_FLUSH && flush != FULL_FLUSH) {
throw new IllegalArgumentException();
}
synchronized (zsRef) {
ensureOpen();
if (flush == NO_FLUSH || flush == SYNC_FLUSH ||
flush == FULL_FLUSH) {
int thisLen = this.len;
int n = deflateBytes(zsRef.address(), b, off, len, flush);
bytesWritten += n;
bytesRead += (thisLen - this.len);
return n;
ByteBuffer input = this.input;
if (finish) {
// disregard given flush mode in this case
flush = FINISH;
}
int params;
if (setParams) {
// bit 0: true to set params
// bit 1-2: strategy (0, 1, or 2)
// bit 3-31: level (0..9 or -1)
params = 1 | strategy << 1 | level << 3;
} else {
params = 0;
}
int inputPos;
long result;
if (input == null) {
inputPos = this.inputPos;
result = deflateBytesBytes(zsRef.address(),
inputArray, inputPos, inputLim - inputPos,
output, off, len,
flush, params);
} else {
inputPos = input.position();
int inputRem = Math.max(input.limit() - inputPos, 0);
if (input.isDirect()) {
try {
long inputAddress = ((DirectBuffer) input).address();
result = deflateBufferBytes(zsRef.address(),
inputAddress + inputPos, inputRem,
output, off, len,
flush, params);
} finally {
Reference.reachabilityFence(input);
}
} else {
byte[] inputArray = ZipUtils.getBufferArray(input);
int inputOffset = ZipUtils.getBufferOffset(input);
result = deflateBytesBytes(zsRef.address(),
inputArray, inputOffset + inputPos, inputRem,
output, off, len,
flush, params);
}
}
int read = (int) (result & 0x7fff_ffffL);
int written = (int) (result >>> 31 & 0x7fff_ffffL);
if ((result >>> 62 & 1) != 0) {
finished = true;
}
if (params != 0 && (result >>> 63 & 1) == 0) {
setParams = false;
}
if (input != null) {
input.position(inputPos + read);
} else {
this.inputPos = inputPos + read;
}
bytesWritten += written;
bytesRead += read;
return written;
}
}
/**
* Compresses the input data and fills the specified buffer with compressed
* data. Returns actual number of bytes of data compressed.
*
* <p>Compression flush mode is one of the following three modes:
*
* <ul>
* <li>{@link #NO_FLUSH}: allows the deflater to decide how much data
* to accumulate, before producing output, in order to achieve the best
* compression (should be used in normal use scenario). A return value
* of 0 in this flush mode indicates that {@link #needsInput()} should
* be called in order to determine if more input data is required.
*
* <li>{@link #SYNC_FLUSH}: all pending output in the deflater is flushed,
* to the specified output buffer, so that an inflater that works on
* compressed data can get all input data available so far (In particular
* the {@link #needsInput()} returns {@code true} after this invocation
* if enough output space is provided). Flushing with {@link #SYNC_FLUSH}
* may degrade compression for some compression algorithms and so it
* should be used only when necessary.
*
* <li>{@link #FULL_FLUSH}: all pending output is flushed out as with
* {@link #SYNC_FLUSH}. The compression state is reset so that the inflater
* that works on the compressed output data can restart from this point
* if previous compressed data has been damaged or if random access is
* desired. Using {@link #FULL_FLUSH} too often can seriously degrade
* compression.
* </ul>
*
* <p>In the case of {@link #FULL_FLUSH} or {@link #SYNC_FLUSH}, if
* the return value is equal to the {@linkplain ByteBuffer#remaining() remaining space}
* of the buffer, this method should be invoked again with the same
* {@code flush} parameter and more output space. Make sure that
* the buffer has at least 6 bytes of remaining space to avoid the
* flush marker (5 bytes) being repeatedly output to the output buffer
* every time this method is invoked.
*
* <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.
*
* <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.
*
* @param output the buffer for the compressed data
* @param flush the compression flush mode
* @return the actual number of bytes of compressed data written to
* the output buffer
*
* @throws IllegalArgumentException if the flush mode is invalid
* @since 11
*/
public int deflate(ByteBuffer output, int flush) {
if (output.isReadOnly()) {
throw new ReadOnlyBufferException();
}
if (flush != NO_FLUSH && flush != SYNC_FLUSH && flush != FULL_FLUSH) {
throw new IllegalArgumentException();
}
synchronized (zsRef) {
ensureOpen();
ByteBuffer input = this.input;
if (finish) {
// disregard given flush mode in this case
flush = FINISH;
}
int params;
if (setParams) {
// bit 0: true to set params
// bit 1-2: strategy (0, 1, or 2)
// bit 3-31: level (0..9 or -1)
params = 1 | strategy << 1 | level << 3;
} else {
params = 0;
}
int outputPos = output.position();
int outputRem = Math.max(output.limit() - outputPos, 0);
int inputPos;
long result;
if (input == null) {
inputPos = this.inputPos;
if (output.isDirect()) {
long outputAddress = ((DirectBuffer) output).address();
try {
result = deflateBytesBuffer(zsRef.address(),
inputArray, inputPos, inputLim - inputPos,
outputAddress + outputPos, outputRem,
flush, params);
} finally {
Reference.reachabilityFence(output);
}
} else {
byte[] outputArray = ZipUtils.getBufferArray(output);
int outputOffset = ZipUtils.getBufferOffset(output);
result = deflateBytesBytes(zsRef.address(),
inputArray, inputPos, inputLim - inputPos,
outputArray, outputOffset + outputPos, outputRem,
flush, params);
}
} else {
inputPos = input.position();
int inputRem = Math.max(input.limit() - inputPos, 0);
if (input.isDirect()) {
long inputAddress = ((DirectBuffer) input).address();
try {
if (output.isDirect()) {
long outputAddress = outputPos + ((DirectBuffer) output).address();
try {
result = deflateBufferBuffer(zsRef.address(),
inputAddress + inputPos, inputRem,
outputAddress, outputRem,
flush, params);
} finally {
Reference.reachabilityFence(output);
}
} else {
byte[] outputArray = ZipUtils.getBufferArray(output);
int outputOffset = ZipUtils.getBufferOffset(output);
result = deflateBufferBytes(zsRef.address(),
inputAddress + inputPos, inputRem,
outputArray, outputOffset + outputPos, outputRem,
flush, params);
}
} 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 = deflateBytesBuffer(zsRef.address(),
inputArray, inputOffset + inputPos, inputRem,
outputAddress + outputPos, outputRem,
flush, params);
} finally {
Reference.reachabilityFence(output);
}
} else {
byte[] outputArray = ZipUtils.getBufferArray(output);
int outputOffset = ZipUtils.getBufferOffset(output);
result = deflateBytesBytes(zsRef.address(),
inputArray, inputOffset + inputPos, inputRem,
outputArray, outputOffset + outputPos, outputRem,
flush, params);
}
}
}
int read = (int) (result & 0x7fff_ffffL);
int written = (int) (result >>> 31 & 0x7fff_ffffL);
if ((result >>> 62 & 1) != 0) {
finished = true;
}
if (params != 0 && (result >>> 63 & 1) == 0) {
setParams = false;
}
if (input != null) {
input.position(inputPos + read);
} else {
this.inputPos = inputPos + read;
}
output.position(outputPos + written);
bytesWritten += written;
bytesRead += read;
return written;
}
}
/**
@ -545,7 +881,8 @@ public class Deflater {
reset(zsRef.address());
finish = false;
finished = false;
off = len = 0;
input = ZipUtils.defaultBuf;
inputArray = null;
bytesRead = bytesWritten = 0;
}
}
@ -560,7 +897,7 @@ public class Deflater {
public void end() {
synchronized (zsRef) {
zsRef.clean();
buf = null;
input = ZipUtils.defaultBuf;
}
}
@ -585,11 +922,26 @@ public class Deflater {
throw new NullPointerException("Deflater has been closed");
}
private static native void initIDs();
private static native long init(int level, int strategy, boolean nowrap);
private static native void setDictionary(long addr, byte[] b, int off, int len);
private native int deflateBytes(long addr, byte[] b, int off, int len,
int flush);
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 deflateBytesBytes(long addr,
byte[] inputArray, int inputOff, int inputLen,
byte[] outputArray, int outputOff, int outputLen,
int flush, int params);
private native long deflateBytesBuffer(long addr,
byte[] inputArray, int inputOff, int inputLen,
long outputAddress, int outputLen,
int flush, int params);
private native long deflateBufferBytes(long addr,
long inputAddress, int inputLen,
byte[] outputArray, int outputOff, int outputLen,
int flush, int params);
private native long deflateBufferBuffer(long addr,
long inputAddress, int inputLen,
long outputAddress, int outputLen,
int flush, int params);
private static native int getAdler(long addr);
private static native void reset(long addr);
private static native void end(long addr);

459
src/java.base/share/classes/java/util/zip/Inflater.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 1996, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1996, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -26,7 +26,13 @@
package java.util.zip;
import java.lang.ref.Cleaner.Cleanable;
import java.lang.ref.Reference;
import java.nio.ByteBuffer;
import java.nio.ReadOnlyBufferException;
import java.util.Objects;
import jdk.internal.ref.CleanerFactory;
import sun.nio.ch.DirectBuffer;
/**
* This class provides support for general purpose decompression using the
@ -35,8 +41,13 @@ import jdk.internal.ref.CleanerFactory;
* protected by patents. It is fully described in the specifications at
* the <a href="package-summary.html#package.description">java.util.zip
* package description</a>.
*
* <p>The following code fragment demonstrates a trivial compression
* <p>
* This class inflates sequences of ZLIB compressed bytes. The input byte
* sequence is provided in either byte array or byte buffer, via one of the
* {@code setInput()} methods. The output byte sequence is written to the
* output byte array or byte buffer passed to the {@code deflate()} methods.
* <p>
* The following code fragment demonstrates a trivial compression
* and decompression of a string using {@code Deflater} and
* {@code Inflater}.
*
@ -92,14 +103,20 @@ import jdk.internal.ref.CleanerFactory;
public class Inflater {
private final InflaterZStreamRef zsRef;
private byte[] buf = defaultBuf;
private int off, len;
private ByteBuffer input = ZipUtils.defaultBuf;
private byte[] inputArray;
private int inputPos, inputLim;
private boolean finished;
private boolean needDict;
private long bytesRead;
private long bytesWritten;
private static final byte[] defaultBuf = new byte[0];
/*
* These fields are used as an "out" parameter from JNI when a
* DataFormatException is thrown during the inflate operation.
*/
private int inputConsumed;
private int outputConsumed;
static {
ZipUtils.loadLibrary();
@ -129,37 +146,71 @@ public class Inflater {
}
/**
* Sets input data for decompression. Should be called whenever
* needsInput() returns true indicating that more input data is
* required.
* @param b the input data bytes
* Sets input data for decompression.
* <p>
* One of the {@code setInput()} methods should be called whenever
* {@code needsInput()} returns true indicating that more input data
* is required.
*
* @param input the input data bytes
* @param off the start offset of the input data
* @param len the length of the input data
* @see Inflater#needsInput
*/
public void setInput(byte[] b, int off, int len) {
if (b == null) {
throw new NullPointerException();
}
if (off < 0 || len < 0 || off > b.length - len) {
public void setInput(byte[] input, int off, int len) {
if (off < 0 || len < 0 || off > input.length - len) {
throw new ArrayIndexOutOfBoundsException();
}
synchronized (zsRef) {
this.buf = b;
this.off = off;
this.len = len;
this.input = null;
this.inputArray = input;
this.inputPos = off;
this.inputLim = off + len;
}
}
/**
* Sets input data for decompression. Should be called whenever
* needsInput() returns true indicating that more input data is
* required.
* @param b the input data bytes
* Sets input data for decompression.
* <p>
* One of the {@code setInput()} methods should be called whenever
* {@code needsInput()} returns true indicating that more input data
* is required.
*
* @param input the input data bytes
* @see Inflater#needsInput
*/
public void setInput(byte[] b) {
setInput(b, 0, b.length);
public void setInput(byte[] input) {
setInput(input, 0, input.length);
}
/**
* Sets input data for decompression.
* <p>
* One of the {@code setInput()} methods should be called whenever
* {@code needsInput()} returns true indicating that more input data
* is required.
* <p>
* The given buffer's position will be advanced as inflate
* operations are performed, up to the buffer's limit.
* The input buffer may be modified (refilled) between inflate
* operations; doing so is equivalent to creating a new buffer
* and setting it with this method.
* <p>
* Modifying the input buffer's contents, position, or limit
* concurrently with an inflate operation will result in
* undefined behavior, which may include incorrect operation
* results or operation failure.
*
* @param input the input data bytes
* @see Inflater#needsInput
* @since 11
*/
public void setInput(ByteBuffer input) {
Objects.requireNonNull(input);
synchronized (zsRef) {
this.input = input;
this.inputArray = null;
}
}
/**
@ -167,22 +218,19 @@ public class Inflater {
* called when inflate() returns 0 and needsDictionary() returns true
* indicating that a preset dictionary is required. The method getAdler()
* can be used to get the Adler-32 value of the dictionary needed.
* @param b the dictionary data bytes
* @param dictionary the dictionary data bytes
* @param off the start offset of the data
* @param len the length of the data
* @see Inflater#needsDictionary
* @see Inflater#getAdler
*/
public void setDictionary(byte[] b, int off, int len) {
if (b == null) {
throw new NullPointerException();
}
if (off < 0 || len < 0 || off > b.length - len) {
public void setDictionary(byte[] dictionary, int off, int len) {
if (off < 0 || len < 0 || off > dictionary.length - len) {
throw new ArrayIndexOutOfBoundsException();
}
synchronized (zsRef) {
ensureOpen();
setDictionary(zsRef.address(), b, off, len);
setDictionary(zsRef.address(), dictionary, off, len);
needDict = false;
}
}
@ -192,12 +240,48 @@ public class Inflater {
* called when inflate() returns 0 and needsDictionary() returns true
* indicating that a preset dictionary is required. The method getAdler()
* can be used to get the Adler-32 value of the dictionary needed.
* @param b the dictionary data bytes
* @param dictionary the dictionary data bytes
* @see Inflater#needsDictionary
* @see Inflater#getAdler
*/
public void setDictionary(byte[] b) {
setDictionary(b, 0, b.length);
public void setDictionary(byte[] dictionary) {
setDictionary(dictionary, 0, dictionary.length);
}
/**
* Sets the preset dictionary to the bytes in the given buffer. Should be
* called when inflate() returns 0 and needsDictionary() returns true
* indicating that a preset dictionary is required. The method getAdler()
* can be used to get the Adler-32 value of the dictionary needed.
* <p>
* The bytes in given byte buffer will be fully consumed by this method. On
* return, its position will equal its limit.
*
* @param dictionary the dictionary data bytes
* @see Inflater#needsDictionary
* @see Inflater#getAdler
* @since 11
*/
public void setDictionary(ByteBuffer dictionary) {
synchronized (zsRef) {
int position = dictionary.position();
int remaining = Math.max(dictionary.limit() - position, 0);
ensureOpen();
if (dictionary.isDirect()) {
long address = ((DirectBuffer) dictionary).address();
try {
setDictionaryBuffer(zsRef.address(), address + position, remaining);
} finally {
Reference.reachabilityFence(dictionary);
}
} else {
byte[] array = ZipUtils.getBufferArray(dictionary);
int offset = ZipUtils.getBufferOffset(dictionary);
setDictionary(zsRef.address(), array, offset + position, remaining);
}
dictionary.position(position + remaining);
needDict = false;
}
}
/**
@ -208,19 +292,22 @@ public class Inflater {
*/
public int getRemaining() {
synchronized (zsRef) {
return len;
ByteBuffer input = this.input;
return input == null ? inputLim - inputPos : input.remaining();
}
}
/**
* Returns true if no data remains in the input buffer. This can
* be used to determine if #setInput should be called in order
* to provide more input.
* be used to determine if one of the {@code setInput()} methods should be
* called in order to provide more input.
*
* @return true if no data remains in the input buffer
*/
public boolean needsInput() {
synchronized (zsRef) {
return len <= 0;
ByteBuffer input = this.input;
return input == null ? inputLim == inputPos : ! input.hasRemaining();
}
}
@ -254,30 +341,103 @@ public class Inflater {
* 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.
* @param b the buffer for the uncompressed data
* <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}
* 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
* @exception DataFormatException if the compressed data format is invalid
* @throws DataFormatException if the compressed data format is invalid
* @see Inflater#needsInput
* @see Inflater#needsDictionary
*/
public int inflate(byte[] b, int off, int len)
public int inflate(byte[] output, int off, int len)
throws DataFormatException
{
if (b == null) {
throw new NullPointerException();
}
if (off < 0 || len < 0 || off > b.length - len) {
if (off < 0 || len < 0 || off > output.length - len) {
throw new ArrayIndexOutOfBoundsException();
}
synchronized (zsRef) {
ensureOpen();
int thisLen = this.len;
int n = inflateBytes(zsRef.address(), b, off, len);
bytesWritten += n;
bytesRead += (thisLen - this.len);
return n;
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;
}
}
@ -288,14 +448,177 @@ public class Inflater {
* 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.
* @param b the buffer for the uncompressed data
* <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
* @exception DataFormatException if the compressed data format is invalid
* @throws DataFormatException if the compressed data format is invalid
* @see Inflater#needsInput
* @see Inflater#needsDictionary
*/
public int inflate(byte[] b) throws DataFormatException {
return inflate(b, 0, b.length);
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;
}
}
/**
@ -368,10 +691,10 @@ public class Inflater {
synchronized (zsRef) {
ensureOpen();
reset(zsRef.address());
buf = defaultBuf;
input = ZipUtils.defaultBuf;
inputArray = null;
finished = false;
needDict = false;
off = len = 0;
bytesRead = bytesWritten = 0;
}
}
@ -386,7 +709,8 @@ public class Inflater {
public void end() {
synchronized (zsRef) {
zsRef.clean();
buf = null;
input = ZipUtils.defaultBuf;
inputArray = null;
}
}
@ -416,18 +740,23 @@ public class Inflater {
throw new NullPointerException("Inflater has been closed");
}
boolean ended() {
synchronized (zsRef) {
return zsRef.address() == 0;
}
}
private static native void initIDs();
private static native long init(boolean nowrap);
private static native void setDictionary(long addr, byte[] b, int off,
int len);
private native int inflateBytes(long addr, byte[] b, int off, int len)
throws DataFormatException;
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);

23
src/java.base/share/classes/java/util/zip/ZipUtils.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2013, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -25,6 +25,8 @@
package java.util.zip;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.file.attribute.FileTime;
import java.security.AccessController;
import java.security.PrivilegedAction;
@ -37,6 +39,9 @@ import java.util.concurrent.TimeUnit;
import static java.util.zip.ZipConstants.ENDHDR;
import jdk.internal.misc.Unsafe;
import sun.nio.ch.DirectBuffer;
class ZipUtils {
// used to adjust values between Windows and java epoch
@ -45,6 +50,9 @@ class ZipUtils {
// used to indicate the corresponding windows time is not available
public static final long WINDOWS_TIME_NOT_AVAILABLE = Long.MIN_VALUE;
// static final ByteBuffer defaultBuf = ByteBuffer.allocateDirect(0);
static final ByteBuffer defaultBuf = ByteBuffer.allocate(0);
/**
* Converts Windows time (in microseconds, UTC/GMT) time to FileTime.
*/
@ -281,4 +289,17 @@ class ZipUtils {
AccessController.doPrivileged(pa);
}
}
private static final Unsafe unsafe = Unsafe.getUnsafe();
private static final long byteBufferArrayOffset = unsafe.objectFieldOffset(ByteBuffer.class, "hb");
private static final long byteBufferOffsetOffset = unsafe.objectFieldOffset(ByteBuffer.class, "offset");
static byte[] getBufferArray(ByteBuffer byteBuffer) {
return (byte[]) unsafe.getObject(byteBuffer, byteBufferArrayOffset);
}
static int getBufferOffset(ByteBuffer byteBuffer) {
return unsafe.getInt(byteBuffer, byteBufferOffsetOffset);
}
}