Repository navigation
Expand file tree
/
Copy pathInflater.java
More file actions
799 lines (756 loc) · 31.3 KB
/
Copy pathInflater.java
File metadata and controls
799 lines (756 loc) · 31.3 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
/*
* Copyright (c) 1996, 2025, 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
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.util.zip;
import java.lang.ref.Cleaner.Cleanable;
import java.nio.ByteBuffer;
import java.nio.ReadOnlyBufferException;
import java.util.Objects;
import jdk.internal.ref.CleanerFactory;
import jdk.internal.util.Preconditions;
import static java.util.zip.ZipUtils.NIO_ACCESS;
/**
* This class provides support for general purpose decompression using the
* popular ZLIB compression library. The ZLIB compression library was
* initially developed as part of the PNG graphics standard and is not
* 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>
* Unless otherwise noted, passing a {@code null} argument to a constructor
* or method in this class will cause a {@link NullPointerException} to be
* thrown.
* <p>
* This class inflates sequences of ZLIB compressed bytes. The input byte
* sequence is provided in either a byte array or a {@link ByteBuffer}, via one of the
* {@code setInput()} methods. The output byte sequence is written to the
* output byte array or {@code ByteBuffer} passed to the {@code inflate()} methods.
* <p>
* To release the resources used by an {@code Inflater}, an application must close it
* by invoking its {@link #end()} or {@link #close()} method.
*
* @apiNote
* This class implements {@link AutoCloseable} to facilitate its usage with
* {@code try}-with-resources statement. The {@linkplain Inflater#close() close() method} simply
* calls {@code end()}.
*
* <p>
* The following code fragment demonstrates a trivial compression
* and decompression of a string using {@code Deflater} and {@code Inflater}.
* {@snippet id="compdecomp" lang="java" class="Snippets" region="DeflaterInflaterExample"}
*
* @see Deflater
* @author David Connelly
* @since 1.1
*
*/
public class Inflater implements AutoCloseable {
private final InflaterZStreamRef zsRef;
private ByteBuffer input = ZipUtils.defaultBuf;
private byte[] inputArray;
private int inputPos, inputLim;
private boolean finished;
private boolean pendingOutput;
private boolean needDict;
private long bytesRead;
private long bytesWritten;
/*
* 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();
initIDs();
}
/**
* Creates a new decompressor. If the parameter 'nowrap' is true then
* the ZLIB header and checksum fields will not be used. This provides
* compatibility with the compression format used by both GZIP and PKZIP.
* <p>
* Note: When using the 'nowrap' option it is also necessary to provide
* an extra "dummy" byte as input. This is required by the ZLIB native
* library in order to support certain optimizations.
*
* @param nowrap if true then support GZIP compatible compression
*/
@SuppressWarnings("this-escape")
public Inflater(boolean nowrap) {
this.zsRef = new InflaterZStreamRef(this, init(nowrap));
}
/**
* Creates a new decompressor.
*/
public Inflater() {
this(false);
}
/**
* 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[] input, int off, int len) {
Preconditions.checkFromIndexSize(off, len, input.length, Preconditions.AIOOBE_FORMATTER);
synchronized (zsRef) {
this.input = null;
this.inputArray = input;
this.inputPos = off;
this.inputLim = off + len;
}
}
/**
* 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[] 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;
}
}
/**
* Sets the preset dictionary to the given array of bytes. 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.
* @param dictionary the dictionary data bytes
* @param off the start offset of the data
* @param len the length of the data
* @throws IllegalStateException if the Inflater is closed
* @see Inflater#needsDictionary
* @see Inflater#getAdler
*/
public void setDictionary(byte[] dictionary, int off, int len) {
Preconditions.checkFromIndexSize(off, len, dictionary.length, Preconditions.AIOOBE_FORMATTER);
synchronized (zsRef) {
ensureOpen();
setDictionary(zsRef.address(), dictionary, off, len);
needDict = false;
}
}
/**
* Sets the preset dictionary to the given array of bytes. 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.
* @param dictionary the dictionary data bytes
* @throws IllegalStateException if the Inflater is closed
* @see Inflater#needsDictionary
* @see Inflater#getAdler
*/
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
* @throws IllegalStateException if the Inflater is closed
* @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()) {
NIO_ACCESS.acquireSession(dictionary);
try {
long address = NIO_ACCESS.getBufferAddress(dictionary);
setDictionaryBuffer(zsRef.address(), address + position, remaining);
} finally {
NIO_ACCESS.releaseSession(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;
}
}
/**
* Returns the total number of bytes remaining in the input buffer.
* This can be used to find out what bytes still remain in the input
* buffer after decompression has finished.
* @return the total number of bytes remaining in the input buffer
*/
public int getRemaining() {
synchronized (zsRef) {
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 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) {
ByteBuffer input = this.input;
return input == null ? inputLim == inputPos : ! input.hasRemaining();
}
}
/**
* {@return true if a preset dictionary is needed for decompression}
* @see Inflater#setDictionary
*/
public boolean needsDictionary() {
synchronized (zsRef) {
return needDict;
}
}
/**
* {@return true if the end of the compressed data stream has been
* reached}
*/
public boolean finished() {
synchronized (zsRef) {
return finished;
}
}
/**
* 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}
* 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
* @throws IllegalStateException if the Inflater is closed
* @see Inflater#needsInput
* @see Inflater#needsDictionary
*/
public int inflate(byte[] output, int off, int len)
throws DataFormatException
{
Preconditions.checkFromIndexSize(off, len, output.length, Preconditions.AIOOBE_FORMATTER);
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()) {
NIO_ACCESS.acquireSession(input);
try {
long inputAddress = NIO_ACCESS.getBufferAddress(input);
result = inflateBufferBytes(zsRef.address(),
inputAddress + inputPos, inputRem,
output, off, len);
} finally {
NIO_ACCESS.releaseSession(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 (written == len && !finished) {
pendingOutput = true;
} else {
pendingOutput = false;
}
if ((result >>> 63 & 1) != 0) {
needDict = true;
}
if (input != null) {
if (read > 0) {
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
* @throws IllegalStateException if the Inflater is closed
* @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
* @throws IllegalStateException if the Inflater is closed
* @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()) {
NIO_ACCESS.acquireSession(output);
try {
long outputAddress = NIO_ACCESS.getBufferAddress(output);
result = inflateBytesBuffer(zsRef.address(),
inputArray, inputPos, inputLim - inputPos,
outputAddress + outputPos, outputRem);
} finally {
NIO_ACCESS.releaseSession(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()) {
NIO_ACCESS.acquireSession(input);
try {
long inputAddress = NIO_ACCESS.getBufferAddress(input);
if (output.isDirect()) {
NIO_ACCESS.acquireSession(output);
try {
long outputAddress = NIO_ACCESS.getBufferAddress(output);
result = inflateBufferBuffer(zsRef.address(),
inputAddress + inputPos, inputRem,
outputAddress + outputPos, outputRem);
} finally {
NIO_ACCESS.releaseSession(output);
}
} else {
byte[] outputArray = ZipUtils.getBufferArray(output);
int outputOffset = ZipUtils.getBufferOffset(output);
result = inflateBufferBytes(zsRef.address(),
inputAddress + inputPos, inputRem,
outputArray, outputOffset + outputPos, outputRem);
}
} finally {
NIO_ACCESS.releaseSession(input);
}
} else {
byte[] inputArray = ZipUtils.getBufferArray(input);
int inputOffset = ZipUtils.getBufferOffset(input);
if (output.isDirect()) {
NIO_ACCESS.acquireSession(output);
try {
long outputAddress = NIO_ACCESS.getBufferAddress(output);
result = inflateBytesBuffer(zsRef.address(),
inputArray, inputOffset + inputPos, inputRem,
outputAddress + outputPos, outputRem);
} finally {
NIO_ACCESS.releaseSession(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;
}
}
/**
* {@return the ADLER-32 value of the uncompressed data}
* @throws IllegalStateException if the Inflater is closed
*/
public int getAdler() {
synchronized (zsRef) {
ensureOpen();
return getAdler(zsRef.address());
}
}
/**
* Returns the total number of compressed bytes input so far.
*
* @implSpec
* This method returns the equivalent of {@code (int) getBytesRead()}
* and therefore cannot return the correct value when it is greater
* than {@link Integer#MAX_VALUE}.
*
* @deprecated Use {@link #getBytesRead()} instead
*
* @return the total number of compressed bytes input so far
* @throws IllegalStateException if the Inflater is closed
*/
@Deprecated(since = "23")
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
* @throws IllegalStateException if the Inflater is closed
* @since 1.5
*/
public long getBytesRead() {
synchronized (zsRef) {
ensureOpen();
return bytesRead;
}
}
/**
* Returns the total number of uncompressed bytes output so far.
*
* @implSpec
* This method returns the equivalent of {@code (int) getBytesWritten()}
* and therefore cannot return the correct value when it is greater
* than {@link Integer#MAX_VALUE}.
*
* @deprecated Use {@link #getBytesWritten()} instead
*
* @return the total number of uncompressed bytes output so far
* @throws IllegalStateException if the Inflater is closed
*/
@Deprecated(since = "23")
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
* @throws IllegalStateException if the Inflater is closed
* @since 1.5
*/
public long getBytesWritten() {
synchronized (zsRef) {
ensureOpen();
return bytesWritten;
}
}
/**
* Resets inflater so that a new set of input data can be processed.
* @throws IllegalStateException if the Inflater is closed
*/
public void reset() {
synchronized (zsRef) {
ensureOpen();
reset(zsRef.address());
input = ZipUtils.defaultBuf;
inputArray = null;
finished = false;
needDict = false;
bytesRead = bytesWritten = 0;
}
}
/**
* Closes and releases the resources held by this {@code Inflater}
* and discards any unprocessed input.
* <p>
* If the {@code Inflater} is already closed then invoking this method has no effect.
*
* @implSpec Subclasses should override this method to clean up the resources
* acquired by the subclass.
*
* @see #close()
*/
public void end() {
synchronized (zsRef) {
// check if already closed
if (zsRef.address() == 0) {
return;
}
zsRef.clean();
input = ZipUtils.defaultBuf;
inputArray = null;
}
}
/**
* Closes and releases the resources held by this {@code Inflater}
* and discards any unprocessed input.
*
* @implSpec This method calls the {@link #end()} method.
* @since 25
*/
@Override
public void close() {
end();
}
private void ensureOpen () {
assert Thread.holdsLock(zsRef);
if (zsRef.address() == 0) {
throw new IllegalStateException("Inflater has been closed");
}
}
boolean hasPendingOutput() {
return pendingOutput;
}
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 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
* serves as the "cleaner" to clean up the native resource when
* the Inflater is ended, closed or cleaned.
*/
static class InflaterZStreamRef implements Runnable {
private long address; // will be a non-zero value when the native resource is in use
private final Cleanable cleanable;
private InflaterZStreamRef(Inflater owner, long addr) {
assert addr != 0 : "native address is 0";
this.cleanable = (owner != null) ? CleanerFactory.cleaner().register(owner, this) : null;
this.address = addr;
}
long address() {
return address;
}
void clean() {
cleanable.clean();
}
public synchronized void run() {
long addr = address;
address = 0;
if (addr != 0) {
end(addr);
}
}
}
}