1 /*
2 * Copyright (c) 1996, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.util.zip;
27
28 import java.lang.ref.Cleaner.Cleanable;
29 import java.lang.ref.Reference;
30 import java.nio.ByteBuffer;
31 import java.nio.ReadOnlyBufferException;
32 import java.util.Objects;
33
34 import jdk.internal.ref.CleanerFactory;
35 import sun.nio.ch.DirectBuffer;
36
37 /**
38 * This class provides support for general purpose decompression using the
39 * popular ZLIB compression library. The ZLIB compression library was
40 * initially developed as part of the PNG graphics standard and is not
41 * protected by patents. It is fully described in the specifications at
42 * the <a href="package-summary.html#package.description">java.util.zip
43 * package description</a>.
44 * <p>
45 * This class inflates sequences of ZLIB compressed bytes. The input byte
46 * sequence is provided in either byte array or byte buffer, via one of the
47 * {@code setInput()} methods. The output byte sequence is written to the
48 * output byte array or byte buffer passed to the {@code deflate()} methods.
49 * <p>
50 * The following code fragment demonstrates a trivial compression
51 * and decompression of a string using {@code Deflater} and
52 * {@code Inflater}.
53 *
54 * <blockquote><pre>
55 * try {
56 * // Encode a String into bytes
57 * String inputString = "blahblahblah\u20AC\u20AC";
58 * byte[] input = inputString.getBytes("UTF-8");
59 *
60 * // Compress the bytes
61 * byte[] output = new byte[100];
62 * Deflater compresser = new Deflater();
63 * compresser.setInput(input);
64 * compresser.finish();
65 * int compressedDataLength = compresser.deflate(output);
66 *
67 * // Decompress the bytes
68 * Inflater decompresser = new Inflater();
69 * decompresser.setInput(output, 0, compressedDataLength);
70 * byte[] result = new byte[100];
71 * int resultLength = decompresser.inflate(result);
72 * decompresser.end();
73 *
74 * // Decode the bytes into a String
75 * String outputString = new String(result, 0, resultLength, "UTF-8");
76 * } catch (java.io.UnsupportedEncodingException ex) {
77 * // handle
78 * } catch (java.util.zip.DataFormatException ex) {
79 * // handle
80 * }
81 * </pre></blockquote>
82 *
83 * @apiNote
84 * To release resources used by this {@code Inflater}, the {@link #end()} method
85 * should be called explicitly. Subclasses are responsible for the cleanup of resources
86 * acquired by the subclass. Subclasses that override {@link #finalize()} in order
87 * to perform cleanup should be modified to use alternative cleanup mechanisms such
88 * as {@link java.lang.ref.Cleaner} and remove the overriding {@code finalize} method.
89 *
90 * @see Deflater
91 * @author David Connelly
92 * @since 1.1
93 *
94 */
95
96 public class Inflater {
97
98 private final InflaterZStreamRef zsRef;
99 private ByteBuffer input = ZipUtils.defaultBuf;
100 private byte[] inputArray;
101 private int inputPos, inputLim;
102 private boolean finished;
103 private boolean needDict;
104 private long bytesRead;
105 private long bytesWritten;
106
107 /*
108 * These fields are used as an "out" parameter from JNI when a
109 * DataFormatException is thrown during the inflate operation.
110 */
111 private int inputConsumed;
112 private int outputConsumed;
113
114 static {
115 ZipUtils.loadLibrary();
116 initIDs();
117 }
118
119 /**
120 * Creates a new decompressor. If the parameter 'nowrap' is true then
121 * the ZLIB header and checksum fields will not be used. This provides
122 * compatibility with the compression format used by both GZIP and PKZIP.
123 * <p>
124 * Note: When using the 'nowrap' option it is also necessary to provide
125 * an extra "dummy" byte as input. This is required by the ZLIB native
126 * library in order to support certain optimizations.
127 *
128 * @param nowrap if true then support GZIP compatible compression
129 */
130 public Inflater(boolean nowrap) {
131 this.zsRef = new InflaterZStreamRef(this, init(nowrap));
132 }
133
134 /**
135 * Creates a new decompressor.
136 */
137 public Inflater() {
138 this(false);
139 }
140
141 /**
142 * Sets input data for decompression.
143 * <p>
144 * One of the {@code setInput()} methods should be called whenever
145 * {@code needsInput()} returns true indicating that more input data
146 * is required.
147 *
148 * @param input the input data bytes
149 * @param off the start offset of the input data
150 * @param len the length of the input data
151 * @see Inflater#needsInput
152 */
153 public void setInput(byte[] input, int off, int len) {
154 if (off < 0 || len < 0 || off > input.length - len) {
155 throw new ArrayIndexOutOfBoundsException();
156 }
157 synchronized (zsRef) {
158 this.input = null;
159 this.inputArray = input;
160 this.inputPos = off;
161 this.inputLim = off + len;
162 }
163 }
164
165 /**
166 * Sets input data for decompression.
167 * <p>
168 * One of the {@code setInput()} methods should be called whenever
169 * {@code needsInput()} returns true indicating that more input data
170 * is required.
171 *
172 * @param input the input data bytes
173 * @see Inflater#needsInput
174 */
175 public void setInput(byte[] input) {
176 setInput(input, 0, input.length);
177 }
178
179 /**
180 * Sets input data for decompression.
181 * <p>
182 * One of the {@code setInput()} methods should be called whenever
183 * {@code needsInput()} returns true indicating that more input data
184 * is required.
185 * <p>
186 * The given buffer's position will be advanced as inflate
187 * operations are performed, up to the buffer's limit.
188 * The input buffer may be modified (refilled) between inflate
189 * operations; doing so is equivalent to creating a new buffer
190 * and setting it with this method.
191 * <p>
192 * Modifying the input buffer's contents, position, or limit
193 * concurrently with an inflate operation will result in
194 * undefined behavior, which may include incorrect operation
195 * results or operation failure.
196 *
197 * @param input the input data bytes
198 * @see Inflater#needsInput
199 * @since 11
200 */
201 public void setInput(ByteBuffer input) {
202 Objects.requireNonNull(input);
203 synchronized (zsRef) {
204 this.input = input;
205 this.inputArray = null;
206 }
207 }
208
209 /**
210 * Sets the preset dictionary to the given array of bytes. Should be
211 * called when inflate() returns 0 and needsDictionary() returns true
212 * indicating that a preset dictionary is required. The method getAdler()
213 * can be used to get the Adler-32 value of the dictionary needed.
214 * @param dictionary the dictionary data bytes
215 * @param off the start offset of the data
216 * @param len the length of the data
217 * @see Inflater#needsDictionary
218 * @see Inflater#getAdler
219 */
220 public void setDictionary(byte[] dictionary, int off, int len) {
221 if (off < 0 || len < 0 || off > dictionary.length - len) {
222 throw new ArrayIndexOutOfBoundsException();
223 }
224 synchronized (zsRef) {
225 ensureOpen();
226 setDictionary(zsRef.address(), dictionary, off, len);
227 needDict = false;
228 }
229 }
230
231 /**
232 * Sets the preset dictionary to the given array of bytes. Should be
233 * called when inflate() returns 0 and needsDictionary() returns true
234 * indicating that a preset dictionary is required. The method getAdler()
235 * can be used to get the Adler-32 value of the dictionary needed.
236 * @param dictionary the dictionary data bytes
237 * @see Inflater#needsDictionary
238 * @see Inflater#getAdler
239 */
240 public void setDictionary(byte[] dictionary) {
241 setDictionary(dictionary, 0, dictionary.length);
242 }
243
244 /**
245 * Sets the preset dictionary to the bytes in the given buffer. Should be
246 * called when inflate() returns 0 and needsDictionary() returns true
247 * indicating that a preset dictionary is required. The method getAdler()
248 * can be used to get the Adler-32 value of the dictionary needed.
249 * <p>
250 * The bytes in given byte buffer will be fully consumed by this method. On
251 * return, its position will equal its limit.
252 *
253 * @param dictionary the dictionary data bytes
254 * @see Inflater#needsDictionary
255 * @see Inflater#getAdler
256 * @since 11
257 */
258 public void setDictionary(ByteBuffer dictionary) {
259 synchronized (zsRef) {
260 int position = dictionary.position();
261 int remaining = Math.max(dictionary.limit() - position, 0);
262 ensureOpen();
263 if (dictionary.isDirect()) {
264 long address = ((DirectBuffer) dictionary).address();
265 try {
266 setDictionaryBuffer(zsRef.address(), address + position, remaining);
267 } finally {
268 Reference.reachabilityFence(dictionary);
269 }
270 } else {
271 byte[] array = ZipUtils.getBufferArray(dictionary);
272 int offset = ZipUtils.getBufferOffset(dictionary);
273 setDictionary(zsRef.address(), array, offset + position, remaining);
274 }
275 dictionary.position(position + remaining);
276 needDict = false;
277 }
278 }
279
280 /**
281 * Returns the total number of bytes remaining in the input buffer.
282 * This can be used to find out what bytes still remain in the input
283 * buffer after decompression has finished.
284 * @return the total number of bytes remaining in the input buffer
285 */
286 public int getRemaining() {
287 synchronized (zsRef) {
288 ByteBuffer input = this.input;
289 return input == null ? inputLim - inputPos : input.remaining();
290 }
291 }
292
293 /**
294 * Returns true if no data remains in the input buffer. This can
295 * be used to determine if one of the {@code setInput()} methods should be
296 * called in order to provide more input.
297 *
298 * @return true if no data remains in the input buffer
299 */
300 public boolean needsInput() {
301 synchronized (zsRef) {
302 ByteBuffer input = this.input;
303 return input == null ? inputLim == inputPos : ! input.hasRemaining();
304 }
305 }
306
307 /**
308 * Returns true if a preset dictionary is needed for decompression.
309 * @return true if a preset dictionary is needed for decompression
310 * @see Inflater#setDictionary
311 */
312 public boolean needsDictionary() {
313 synchronized (zsRef) {
314 return needDict;
315 }
316 }
317
318 /**
319 * Returns true if the end of the compressed data stream has been
320 * reached.
321 * @return true if the end of the compressed data stream has been
322 * reached
323 */
324 public boolean finished() {
325 synchronized (zsRef) {
326 return finished;
327 }
328 }
329
330 /**
331 * Uncompresses bytes into specified buffer. Returns actual number
332 * of bytes uncompressed. A return value of 0 indicates that
333 * needsInput() or needsDictionary() should be called in order to
334 * determine if more input data or a preset dictionary is required.
335 * In the latter case, getAdler() can be used to get the Adler-32
336 * value of the dictionary required.
337 * <p>
338 * If the {@link #setInput(ByteBuffer)} method was called to provide a buffer
339 * for input, the input buffer's position will be advanced by the number of bytes
340 * consumed by this operation, even in the event that a {@link DataFormatException}
341 * is thrown.
342 * <p>
343 * The {@linkplain #getRemaining() remaining byte count} will be reduced by
344 * the number of consumed input bytes. If the {@link #setInput(ByteBuffer)}
345 * method was called to provide a buffer for input, the input buffer's position
346 * will be advanced the number of consumed bytes.
347 * <p>
348 * These byte totals, as well as
349 * the {@linkplain #getBytesRead() total bytes read}
350 * and the {@linkplain #getBytesWritten() total bytes written}
351 * values, will be updated even in the event that a {@link DataFormatException}
352 * is thrown to reflect the amount of data consumed and produced before the
353 * exception occurred.
354 *
355 * @param output the buffer for the uncompressed data
356 * @param off the start offset of the data
357 * @param len the maximum number of uncompressed bytes
358 * @return the actual number of uncompressed bytes
359 * @throws DataFormatException if the compressed data format is invalid
360 * @see Inflater#needsInput
361 * @see Inflater#needsDictionary
362 */
363 public int inflate(byte[] output, int off, int len)
364 throws DataFormatException
365 {
366 if (off < 0 || len < 0 || off > output.length - len) {
367 throw new ArrayIndexOutOfBoundsException();
368 }
369 synchronized (zsRef) {
370 ensureOpen();
371 ByteBuffer input = this.input;
372 long result;
373 int inputPos;
374 try {
375 if (input == null) {
376 inputPos = this.inputPos;
377 try {
378 result = inflateBytesBytes(zsRef.address(),
379 inputArray, inputPos, inputLim - inputPos,
380 output, off, len);
381 } catch (DataFormatException e) {
382 this.inputPos = inputPos + inputConsumed;
383 throw e;
384 }
385 } else {
386 inputPos = input.position();
387 try {
388 int inputRem = Math.max(input.limit() - inputPos, 0);
389 if (input.isDirect()) {
390 try {
391 long inputAddress = ((DirectBuffer) input).address();
392 result = inflateBufferBytes(zsRef.address(),
393 inputAddress + inputPos, inputRem,
394 output, off, len);
395 } finally {
396 Reference.reachabilityFence(input);
397 }
398 } else {
399 byte[] inputArray = ZipUtils.getBufferArray(input);
400 int inputOffset = ZipUtils.getBufferOffset(input);
401 result = inflateBytesBytes(zsRef.address(),
402 inputArray, inputOffset + inputPos, inputRem,
403 output, off, len);
404 }
405 } catch (DataFormatException e) {
406 input.position(inputPos + inputConsumed);
407 throw e;
408 }
409 }
410 } catch (DataFormatException e) {
411 bytesRead += inputConsumed;
412 inputConsumed = 0;
413 int written = outputConsumed;
414 bytesWritten += written;
415 outputConsumed = 0;
416 throw e;
417 }
418 int read = (int) (result & 0x7fff_ffffL);
419 int written = (int) (result >>> 31 & 0x7fff_ffffL);
420 if ((result >>> 62 & 1) != 0) {
421 finished = true;
422 }
423 if ((result >>> 63 & 1) != 0) {
424 needDict = true;
425 }
426 if (input != null) {
427 input.position(inputPos + read);
428 } else {
429 this.inputPos = inputPos + read;
430 }
431 bytesWritten += written;
432 bytesRead += read;
433 return written;
434 }
435 }
436
437 /**
438 * Uncompresses bytes into specified buffer. Returns actual number
439 * of bytes uncompressed. A return value of 0 indicates that
440 * needsInput() or needsDictionary() should be called in order to
441 * determine if more input data or a preset dictionary is required.
442 * In the latter case, getAdler() can be used to get the Adler-32
443 * value of the dictionary required.
444 * <p>
445 * The {@linkplain #getRemaining() remaining byte count} will be reduced by
446 * the number of consumed input bytes. If the {@link #setInput(ByteBuffer)}
447 * method was called to provide a buffer for input, the input buffer's position
448 * will be advanced the number of consumed bytes.
449 * <p>
450 * These byte totals, as well as
451 * the {@linkplain #getBytesRead() total bytes read}
452 * and the {@linkplain #getBytesWritten() total bytes written}
453 * values, will be updated even in the event that a {@link DataFormatException}
454 * is thrown to reflect the amount of data consumed and produced before the
455 * exception occurred.
456 *
457 * @param output the buffer for the uncompressed data
458 * @return the actual number of uncompressed bytes
459 * @throws DataFormatException if the compressed data format is invalid
460 * @see Inflater#needsInput
461 * @see Inflater#needsDictionary
462 */
463 public int inflate(byte[] output) throws DataFormatException {
464 return inflate(output, 0, output.length);
465 }
466
467 /**
468 * Uncompresses bytes into specified buffer. Returns actual number
469 * of bytes uncompressed. A return value of 0 indicates that
470 * needsInput() or needsDictionary() should be called in order to
471 * determine if more input data or a preset dictionary is required.
472 * In the latter case, getAdler() can be used to get the Adler-32
473 * value of the dictionary required.
474 * <p>
475 * On success, the position of the given {@code output} byte buffer will be
476 * advanced by as many bytes as were produced by the operation, which is equal
477 * to the number returned by this method. Note that the position of the
478 * {@code output} buffer will be advanced even in the event that a
479 * {@link DataFormatException} is thrown.
480 * <p>
481 * The {@linkplain #getRemaining() remaining byte count} will be reduced by
482 * the number of consumed input bytes. If the {@link #setInput(ByteBuffer)}
483 * method was called to provide a buffer for input, the input buffer's position
484 * will be advanced the number of consumed bytes.
485 * <p>
486 * These byte totals, as well as
487 * the {@linkplain #getBytesRead() total bytes read}
488 * and the {@linkplain #getBytesWritten() total bytes written}
489 * values, will be updated even in the event that a {@link DataFormatException}
490 * is thrown to reflect the amount of data consumed and produced before the
491 * exception occurred.
492 *
493 * @param output the buffer for the uncompressed data
494 * @return the actual number of uncompressed bytes
495 * @throws DataFormatException if the compressed data format is invalid
496 * @throws ReadOnlyBufferException if the given output buffer is read-only
497 * @see Inflater#needsInput
498 * @see Inflater#needsDictionary
499 * @since 11
500 */
501 public int inflate(ByteBuffer output) throws DataFormatException {
502 if (output.isReadOnly()) {
503 throw new ReadOnlyBufferException();
504 }
505 synchronized (zsRef) {
506 ensureOpen();
507 ByteBuffer input = this.input;
508 long result;
509 int inputPos;
510 int outputPos = output.position();
511 int outputRem = Math.max(output.limit() - outputPos, 0);
512 try {
513 if (input == null) {
514 inputPos = this.inputPos;
515 try {
516 if (output.isDirect()) {
517 long outputAddress = ((DirectBuffer) output).address();
518 try {
519 result = inflateBytesBuffer(zsRef.address(),
520 inputArray, inputPos, inputLim - inputPos,
521 outputAddress + outputPos, outputRem);
522 } finally {
523 Reference.reachabilityFence(output);
524 }
525 } else {
526 byte[] outputArray = ZipUtils.getBufferArray(output);
527 int outputOffset = ZipUtils.getBufferOffset(output);
528 result = inflateBytesBytes(zsRef.address(),
529 inputArray, inputPos, inputLim - inputPos,
530 outputArray, outputOffset + outputPos, outputRem);
531 }
532 } catch (DataFormatException e) {
533 this.inputPos = inputPos + inputConsumed;
534 throw e;
535 }
536 } else {
537 inputPos = input.position();
538 int inputRem = Math.max(input.limit() - inputPos, 0);
539 try {
540 if (input.isDirect()) {
541 long inputAddress = ((DirectBuffer) input).address();
542 try {
543 if (output.isDirect()) {
544 long outputAddress = ((DirectBuffer) output).address();
545 try {
546 result = inflateBufferBuffer(zsRef.address(),
547 inputAddress + inputPos, inputRem,
548 outputAddress + outputPos, outputRem);
549 } finally {
550 Reference.reachabilityFence(output);
551 }
552 } else {
553 byte[] outputArray = ZipUtils.getBufferArray(output);
554 int outputOffset = ZipUtils.getBufferOffset(output);
555 result = inflateBufferBytes(zsRef.address(),
556 inputAddress + inputPos, inputRem,
557 outputArray, outputOffset + outputPos, outputRem);
558 }
559 } finally {
560 Reference.reachabilityFence(input);
561 }
562 } else {
563 byte[] inputArray = ZipUtils.getBufferArray(input);
564 int inputOffset = ZipUtils.getBufferOffset(input);
565 if (output.isDirect()) {
566 long outputAddress = ((DirectBuffer) output).address();
567 try {
568 result = inflateBytesBuffer(zsRef.address(),
569 inputArray, inputOffset + inputPos, inputRem,
570 outputAddress + outputPos, outputRem);
571 } finally {
572 Reference.reachabilityFence(output);
573 }
574 } else {
575 byte[] outputArray = ZipUtils.getBufferArray(output);
576 int outputOffset = ZipUtils.getBufferOffset(output);
577 result = inflateBytesBytes(zsRef.address(),
578 inputArray, inputOffset + inputPos, inputRem,
579 outputArray, outputOffset + outputPos, outputRem);
580 }
581 }
582 } catch (DataFormatException e) {
583 input.position(inputPos + inputConsumed);
584 throw e;
585 }
586 }
587 } catch (DataFormatException e) {
588 bytesRead += inputConsumed;
589 inputConsumed = 0;
590 int written = outputConsumed;
591 output.position(outputPos + written);
592 bytesWritten += written;
593 outputConsumed = 0;
594 throw e;
595 }
596 int read = (int) (result & 0x7fff_ffffL);
597 int written = (int) (result >>> 31 & 0x7fff_ffffL);
598 if ((result >>> 62 & 1) != 0) {
599 finished = true;
600 }
601 if ((result >>> 63 & 1) != 0) {
602 needDict = true;
603 }
604 if (input != null) {
605 input.position(inputPos + read);
606 } else {
607 this.inputPos = inputPos + read;
608 }
609 // Note: this method call also serves to keep the byteBuffer ref alive
610 output.position(outputPos + written);
611 bytesWritten += written;
612 bytesRead += read;
613 return written;
614 }
615 }
616
617 /**
618 * Returns the ADLER-32 value of the uncompressed data.
619 * @return the ADLER-32 value of the uncompressed data
620 */
621 public int getAdler() {
622 synchronized (zsRef) {
623 ensureOpen();
624 return getAdler(zsRef.address());
625 }
626 }
627
628 /**
629 * Returns the total number of compressed bytes input so far.
630 *
631 * <p>Since the number of bytes may be greater than
632 * Integer.MAX_VALUE, the {@link #getBytesRead()} method is now
633 * the preferred means of obtaining this information.</p>
634 *
635 * @return the total number of compressed bytes input so far
636 */
637 public int getTotalIn() {
638 return (int) getBytesRead();
639 }
640
641 /**
642 * Returns the total number of compressed bytes input so far.
643 *
644 * @return the total (non-negative) number of compressed bytes input so far
645 * @since 1.5
646 */
647 public long getBytesRead() {
648 synchronized (zsRef) {
649 ensureOpen();
650 return bytesRead;
651 }
652 }
653
654 /**
655 * Returns the total number of uncompressed bytes output so far.
656 *
657 * <p>Since the number of bytes may be greater than
658 * Integer.MAX_VALUE, the {@link #getBytesWritten()} method is now
659 * the preferred means of obtaining this information.</p>
660 *
661 * @return the total number of uncompressed bytes output so far
662 */
663 public int getTotalOut() {
664 return (int) getBytesWritten();
665 }
666
667 /**
668 * Returns the total number of uncompressed bytes output so far.
669 *
670 * @return the total (non-negative) number of uncompressed bytes output so far
671 * @since 1.5
672 */
673 public long getBytesWritten() {
674 synchronized (zsRef) {
675 ensureOpen();
676 return bytesWritten;
677 }
678 }
679
680 /**
681 * Resets inflater so that a new set of input data can be processed.
682 */
683 public void reset() {
684 synchronized (zsRef) {
685 ensureOpen();
686 reset(zsRef.address());
687 input = ZipUtils.defaultBuf;
688 inputArray = null;
689 finished = false;
690 needDict = false;
691 bytesRead = bytesWritten = 0;
692 }
693 }
694
695 /**
696 * Closes the decompressor and discards any unprocessed input.
697 *
698 * This method should be called when the decompressor is no longer
699 * being used. Once this method is called, the behavior of the
700 * Inflater object is undefined.
701 */
702 public void end() {
703 synchronized (zsRef) {
704 zsRef.clean();
705 input = ZipUtils.defaultBuf;
706 inputArray = null;
707 }
708 }
709
710
711 private void ensureOpen () {
712 assert Thread.holdsLock(zsRef);
713 if (zsRef.address() == 0)
714 throw new NullPointerException("Inflater has been closed");
715 }
716
717 private static native void initIDs();
718 private static native long init(boolean nowrap);
719 private static native void setDictionary(long addr, byte[] b, int off,
720 int len);
721 private static native void setDictionaryBuffer(long addr, long bufAddress, int len);
722 private native long inflateBytesBytes(long addr,
723 byte[] inputArray, int inputOff, int inputLen,
724 byte[] outputArray, int outputOff, int outputLen) throws DataFormatException;
725 private native long inflateBytesBuffer(long addr,
726 byte[] inputArray, int inputOff, int inputLen,
727 long outputAddress, int outputLen) throws DataFormatException;
728 private native long inflateBufferBytes(long addr,
729 long inputAddress, int inputLen,
730 byte[] outputArray, int outputOff, int outputLen) throws DataFormatException;
731 private native long inflateBufferBuffer(long addr,
732 long inputAddress, int inputLen,
733 long outputAddress, int outputLen) throws DataFormatException;
734 private static native int getAdler(long addr);
735 private static native void reset(long addr);
736 private static native void end(long addr);
737
738 /**
739 * A reference to the native zlib's z_stream structure. It also
740 * serves as the "cleaner" to clean up the native resource when
741 * the Inflater is ended, closed or cleaned.
742 */
743 static class InflaterZStreamRef implements Runnable {
744
745 private long address;
746 private final Cleanable cleanable;
747
748 private InflaterZStreamRef(Inflater owner, long addr) {
749 this.cleanable = (owner != null) ? CleanerFactory.cleaner().register(owner, this) : null;
750 this.address = addr;
751 }
752
753 long address() {
754 return address;
755 }
756
757 void clean() {
758 cleanable.clean();
759 }
760
761 public synchronized void run() {
762 long addr = address;
763 address = 0;
764 if (addr != 0) {
765 end(addr);
766 }
767 }
768
769 }
770 }