ZipFile.java 25.0 KB
Newer Older
D
duke 已提交
1
/*
2
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
D
duke 已提交
3 4 5 6
 * 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
7
 * published by the Free Software Foundation.  Oracle designates this
D
duke 已提交
8
 * particular file as subject to the "Classpath" exception as provided
9
 * by Oracle in the LICENSE file that accompanied this code.
D
duke 已提交
10 11 12 13 14 15 16 17 18 19 20
 *
 * 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.
 *
21 22 23
 * 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.
D
duke 已提交
24 25 26 27
 */

package java.util.zip;

28
import java.io.Closeable;
D
duke 已提交
29 30 31 32
import java.io.InputStream;
import java.io.IOException;
import java.io.EOFException;
import java.io.File;
33
import java.nio.charset.Charset;
D
duke 已提交
34 35
import java.util.Vector;
import java.util.Enumeration;
36 37
import java.util.Set;
import java.util.HashSet;
D
duke 已提交
38
import java.util.NoSuchElementException;
39 40
import java.security.AccessController;
import sun.security.action.GetPropertyAction;
41
import static java.util.zip.ZipConstants64.*;
D
duke 已提交
42 43 44 45 46 47 48 49 50 51 52

/**
 * This class is used to read entries from a zip file.
 *
 * <p> Unless otherwise noted, passing a <tt>null</tt> argument to a constructor
 * or method in this class will cause a {@link NullPointerException} to be
 * thrown.
 *
 * @author      David Connelly
 */
public
53
class ZipFile implements ZipConstants, Closeable {
D
duke 已提交
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
    private long jzfile;  // address of jzfile data
    private String name;  // zip file name
    private int total;    // total number of entries
    private boolean closeRequested;

    private static final int STORED = ZipEntry.STORED;
    private static final int DEFLATED = ZipEntry.DEFLATED;

    /**
     * Mode flag to open a zip file for reading.
     */
    public static final int OPEN_READ = 0x1;

    /**
     * Mode flag to open a zip file and mark it for deletion.  The file will be
     * deleted some time between the moment that it is opened and the moment
     * that it is closed, but its contents will remain accessible via the
     * <tt>ZipFile</tt> object until either the close method is invoked or the
     * virtual machine exits.
     */
    public static final int OPEN_DELETE = 0x4;

    static {
        /* Zip library is loaded from System.initializeSystemClass */
        initIDs();
    }

    private static native void initIDs();

83 84 85 86 87 88 89 90 91 92 93
    private static final boolean usemmap;

    static {
        // A system prpperty to disable mmap use to avoid vm crash when
        // in-use zip file is accidently overwritten by others.
        String prop = AccessController.doPrivileged(
            new GetPropertyAction("sun.zip.disableMemoryMapping"));
        usemmap = (prop == null ||
                   !(prop.length() == 0 || prop.equalsIgnoreCase("true")));
    }

D
duke 已提交
94 95 96
    /**
     * Opens a zip file for reading.
     *
97 98 99 100 101 102
     * <p>First, if there is a security manager, its <code>checkRead</code>
     * method is called with the <code>name</code> argument as its argument
     * to ensure the read is allowed.
     *
     * <p>The UTF-8 {@link java.nio.charset.Charset charset} is used to
     * decode the entry names and comments.
D
duke 已提交
103 104 105 106 107 108
     *
     * @param name the name of the zip file
     * @throws ZipException if a ZIP format error has occurred
     * @throws IOException if an I/O error has occurred
     * @throws SecurityException if a security manager exists and its
     *         <code>checkRead</code> method doesn't allow read access to the file.
109
     *
D
duke 已提交
110 111 112 113 114 115 116 117 118 119 120 121 122 123 124
     * @see SecurityManager#checkRead(java.lang.String)
     */
    public ZipFile(String name) throws IOException {
        this(new File(name), OPEN_READ);
    }

    /**
     * Opens a new <code>ZipFile</code> to read from the specified
     * <code>File</code> object in the specified mode.  The mode argument
     * must be either <tt>OPEN_READ</tt> or <tt>OPEN_READ | OPEN_DELETE</tt>.
     *
     * <p>First, if there is a security manager, its <code>checkRead</code>
     * method is called with the <code>name</code> argument as its argument to
     * ensure the read is allowed.
     *
125 126 127
     * <p>The UTF-8 {@link java.nio.charset.Charset charset} is used to
     * decode the entry names and comments
     *
D
duke 已提交
128 129 130 131 132 133 134 135 136 137 138 139 140 141
     * @param file the ZIP file to be opened for reading
     * @param mode the mode in which the file is to be opened
     * @throws ZipException if a ZIP format error has occurred
     * @throws IOException if an I/O error has occurred
     * @throws SecurityException if a security manager exists and
     *         its <code>checkRead</code> method
     *         doesn't allow read access to the file,
     *         or its <code>checkDelete</code> method doesn't allow deleting
     *         the file when the <tt>OPEN_DELETE</tt> flag is set.
     * @throws IllegalArgumentException if the <tt>mode</tt> argument is invalid
     * @see SecurityManager#checkRead(java.lang.String)
     * @since 1.3
     */
    public ZipFile(File file, int mode) throws IOException {
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
        this(file, mode, Charset.forName("UTF-8"));
    }

    /**
     * Opens a ZIP file for reading given the specified File object.
     *
     * <p>The UTF-8 {@link java.nio.charset.Charset charset} is used to
     * decode the entry names and comments.
     *
     * @param file the ZIP file to be opened for reading
     * @throws ZipException if a ZIP format error has occurred
     * @throws IOException if an I/O error has occurred
     */
    public ZipFile(File file) throws ZipException, IOException {
        this(file, OPEN_READ);
    }

    private ZipCoder zc;

    /**
     * Opens a new <code>ZipFile</code> to read from the specified
     * <code>File</code> object in the specified mode.  The mode argument
     * must be either <tt>OPEN_READ</tt> or <tt>OPEN_READ | OPEN_DELETE</tt>.
     *
     * <p>First, if there is a security manager, its <code>checkRead</code>
     * method is called with the <code>name</code> argument as its argument to
     * ensure the read is allowed.
     *
     * @param file the ZIP file to be opened for reading
     * @param mode the mode in which the file is to be opened
     * @param charset
173
     *        the {@linkplain java.nio.charset.Charset charset} to
174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194
     *        be used to decode the ZIP entry name and comment that are not
     *        encoded by using UTF-8 encoding (indicated by entry's general
     *        purpose flag).
     *
     * @throws ZipException if a ZIP format error has occurred
     * @throws IOException if an I/O error has occurred
     *
     * @throws SecurityException
     *         if a security manager exists and its <code>checkRead</code>
     *         method doesn't allow read access to the file,or its
     *         <code>checkDelete</code> method doesn't allow deleting the
     *         file when the <tt>OPEN_DELETE</tt> flag is set
     *
     * @throws IllegalArgumentException if the <tt>mode</tt> argument is invalid
     *
     * @see SecurityManager#checkRead(java.lang.String)
     *
     * @since 1.7
     */
    public ZipFile(File file, int mode, Charset charset) throws IOException
    {
D
duke 已提交
195 196 197 198 199 200 201 202 203 204 205 206 207
        if (((mode & OPEN_READ) == 0) ||
            ((mode & ~(OPEN_READ | OPEN_DELETE)) != 0)) {
            throw new IllegalArgumentException("Illegal mode: 0x"+
                                               Integer.toHexString(mode));
        }
        String name = file.getPath();
        SecurityManager sm = System.getSecurityManager();
        if (sm != null) {
            sm.checkRead(name);
            if ((mode & OPEN_DELETE) != 0) {
                sm.checkDelete(name);
            }
        }
208 209 210
        if (charset == null)
            throw new NullPointerException("charset is null");
        this.zc = ZipCoder.get(charset);
211
        long t0 = System.nanoTime();
212
        jzfile = open(name, mode, file.lastModified(), usemmap);
213 214
        sun.misc.PerfCounter.getZipFileOpenTime().addElapsedTimeFrom(t0);
        sun.misc.PerfCounter.getZipFileCount().increment();
D
duke 已提交
215 216 217 218
        this.name = name;
        this.total = getTotal(jzfile);
    }

219 220 221 222 223 224 225 226 227
    /**
     * Opens a zip file for reading.
     *
     * <p>First, if there is a security manager, its <code>checkRead</code>
     * method is called with the <code>name</code> argument as its argument
     * to ensure the read is allowed.
     *
     * @param name the name of the zip file
     * @param charset
228
     *        the {@linkplain java.nio.charset.Charset charset} to
229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246
     *        be used to decode the ZIP entry name and comment that are not
     *        encoded by using UTF-8 encoding (indicated by entry's general
     *        purpose flag).
     *
     * @throws ZipException if a ZIP format error has occurred
     * @throws IOException if an I/O error has occurred
     * @throws SecurityException
     *         if a security manager exists and its <code>checkRead</code>
     *         method doesn't allow read access to the file
     *
     * @see SecurityManager#checkRead(java.lang.String)
     *
     * @since 1.7
     */
    public ZipFile(String name, Charset charset) throws IOException
    {
        this(new File(name), OPEN_READ, charset);
    }
D
duke 已提交
247 248 249 250

    /**
     * Opens a ZIP file for reading given the specified File object.
     * @param file the ZIP file to be opened for reading
251
     * @param charset
252
     *        The {@linkplain java.nio.charset.Charset charset} to be
253 254 255 256 257 258
     *        used to decode the ZIP entry name and comment (ignored if
     *        the <a href="package-summary.html#lang_encoding"> language
     *        encoding bit</a> of the ZIP entry's general purpose bit
     *        flag is set).
     *
     * @throws ZipException if a ZIP format error has occurred
D
duke 已提交
259
     * @throws IOException if an I/O error has occurred
260 261
     *
     * @since 1.7
D
duke 已提交
262
     */
263 264 265
    public ZipFile(File file, Charset charset) throws IOException
    {
        this(file, OPEN_READ, charset);
D
duke 已提交
266 267
    }

268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286
    /**
     * Returns the zip file comment, or null if none.
     *
     * @return the comment string for the zip file, or null if none
     *
     * @throws IllegalStateException if the zip file has been closed
     *
     * Since 1.7
     */
    public String getComment() {
        synchronized (this) {
            ensureOpen();
            byte[] bcomm = getCommentBytes(jzfile);
            if (bcomm == null)
                return null;
            return zc.toString(bcomm, bcomm.length);
        }
    }

D
duke 已提交
287 288 289 290 291 292 293 294 295 296 297 298 299 300 301
    /**
     * Returns the zip file entry for the specified name, or null
     * if not found.
     *
     * @param name the name of the entry
     * @return the zip file entry, or null if not found
     * @throws IllegalStateException if the zip file has been closed
     */
    public ZipEntry getEntry(String name) {
        if (name == null) {
            throw new NullPointerException("name");
        }
        long jzentry = 0;
        synchronized (this) {
            ensureOpen();
302
            jzentry = getEntry(jzfile, zc.getBytes(name), true);
D
duke 已提交
303
            if (jzentry != 0) {
304
                ZipEntry ze = getZipEntry(name, jzentry);
D
duke 已提交
305 306 307 308 309 310 311
                freeEntry(jzfile, jzentry);
                return ze;
            }
        }
        return null;
    }

312
    private static native long getEntry(long jzfile, byte[] name,
D
duke 已提交
313 314 315 316 317
                                        boolean addSlash);

    // freeEntry releases the C jzentry struct.
    private static native void freeEntry(long jzfile, long jzentry);

318 319 320
    // the outstanding inputstreams that need to be closed.
    private Set<ZipFileInputStream> streams = new HashSet<ZipFileInputStream>();

D
duke 已提交
321 322 323 324 325 326 327 328 329 330 331 332 333 334 335
    /**
     * Returns an input stream for reading the contents of the specified
     * zip file entry.
     *
     * <p> Closing this ZIP file will, in turn, close all input
     * streams that have been returned by invocations of this method.
     *
     * @param entry the zip file entry
     * @return the input stream for reading the contents of the specified
     * zip file entry.
     * @throws ZipException if a ZIP format error has occurred
     * @throws IOException if an I/O error has occurred
     * @throws IllegalStateException if the zip file has been closed
     */
    public InputStream getInputStream(ZipEntry entry) throws IOException {
336 337
        if (entry == null) {
            throw new NullPointerException("entry");
D
duke 已提交
338 339 340 341 342
        }
        long jzentry = 0;
        ZipFileInputStream in = null;
        synchronized (this) {
            ensureOpen();
343 344 345 346 347
            if (!zc.isUTF8() && (entry.flag & EFS) != 0) {
                jzentry = getEntry(jzfile, zc.getBytesUTF8(entry.name), false);
            } else {
                jzentry = getEntry(jzfile, zc.getBytes(entry.name), false);
            }
D
duke 已提交
348 349 350 351
            if (jzentry == 0) {
                return null;
            }
            in = new ZipFileInputStream(jzentry);
352
            streams.add(in);
D
duke 已提交
353 354
        }
        final ZipFileInputStream zfin = in;
355
        switch (getEntryMethod(jzentry)) {
D
duke 已提交
356 357 358 359
        case STORED:
            return zfin;
        case DEFLATED:
            // MORE: Compute good size for inflater stream:
360
            long size = getEntrySize(jzentry) + 2; // Inflater likes a bit of slack
D
duke 已提交
361 362 363 364 365 366 367
            if (size > 65536) size = 8192;
            if (size <= 0) size = 4096;
            return new InflaterInputStream(zfin, getInflater(), (int)size) {
                private boolean isClosed = false;

                public void close() throws IOException {
                    if (!isClosed) {
368
                        releaseInflater(inf);
D
duke 已提交
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
                        this.in.close();
                        isClosed = true;
                    }
                }
                // Override fill() method to provide an extra "dummy" byte
                // at the end of the input stream. This is required when
                // using the "nowrap" Inflater option.
                protected void fill() throws IOException {
                    if (eof) {
                        throw new EOFException(
                            "Unexpected end of ZLIB input stream");
                    }
                    len = this.in.read(buf, 0, buf.length);
                    if (len == -1) {
                        buf[0] = 0;
                        len = 1;
                        eof = true;
                    }
                    inf.setInput(buf, 0, len);
                }
                private boolean eof;

                public int available() throws IOException {
                    if (isClosed)
                        return 0;
                    long avail = zfin.size() - inf.getBytesWritten();
                    return avail > (long) Integer.MAX_VALUE ?
                        Integer.MAX_VALUE : (int) avail;
                }
            };
        default:
            throw new ZipException("invalid compression method");
        }
    }

    /*
     * Gets an inflater from the list of available inflaters or allocates
     * a new one.
     */
    private Inflater getInflater() {
        synchronized (inflaters) {
            int size = inflaters.size();
            if (size > 0) {
                Inflater inf = (Inflater)inflaters.remove(size - 1);
                return inf;
            } else {
                return new Inflater(true);
            }
        }
    }

    /*
     * Releases the specified inflater to the list of available inflaters.
     */
    private void releaseInflater(Inflater inf) {
        synchronized (inflaters) {
425
            inf.reset();
D
duke 已提交
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
            inflaters.add(inf);
        }
    }

    // List of available Inflater objects for decompression
    private Vector inflaters = new Vector();

    /**
     * Returns the path name of the ZIP file.
     * @return the path name of the ZIP file
     */
    public String getName() {
        return name;
    }

    /**
     * Returns an enumeration of the ZIP file entries.
     * @return an enumeration of the ZIP file entries
     * @throws IllegalStateException if the zip file has been closed
     */
    public Enumeration<? extends ZipEntry> entries() {
        ensureOpen();
        return new Enumeration<ZipEntry>() {
                private int i = 0;
                public boolean hasMoreElements() {
                    synchronized (ZipFile.this) {
                        ensureOpen();
                        return i < total;
                    }
                }
                public ZipEntry nextElement() throws NoSuchElementException {
                    synchronized (ZipFile.this) {
                        ensureOpen();
                        if (i >= total) {
                            throw new NoSuchElementException();
                        }
                        long jzentry = getNextEntry(jzfile, i++);
                        if (jzentry == 0) {
                            String message;
                            if (closeRequested) {
                                message = "ZipFile concurrently closed";
                            } else {
                                message = getZipMessage(ZipFile.this.jzfile);
                            }
                            throw new ZipError("jzentry == 0" +
                                               ",\n jzfile = " + ZipFile.this.jzfile +
                                               ",\n total = " + ZipFile.this.total +
                                               ",\n name = " + ZipFile.this.name +
                                               ",\n i = " + i +
                                               ",\n message = " + message
                                );
                        }
478
                        ZipEntry ze = getZipEntry(null, jzentry);
D
duke 已提交
479 480 481 482 483 484 485
                        freeEntry(jzfile, jzentry);
                        return ze;
                    }
                }
            };
    }

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
    private ZipEntry getZipEntry(String name, long jzentry) {
        ZipEntry e = new ZipEntry();
        e.flag = getEntryFlag(jzentry);  // get the flag first
        if (name != null) {
            e.name = name;
        } else {
            byte[] bname = getEntryBytes(jzentry, JZENTRY_NAME);
            if (!zc.isUTF8() && (e.flag & EFS) != 0) {
                e.name = zc.toStringUTF8(bname, bname.length);
            } else {
                e.name = zc.toString(bname, bname.length);
            }
        }
        e.time = getEntryTime(jzentry);
        e.crc = getEntryCrc(jzentry);
        e.size = getEntrySize(jzentry);
        e. csize = getEntryCSize(jzentry);
        e.method = getEntryMethod(jzentry);
        e.extra = getEntryBytes(jzentry, JZENTRY_EXTRA);
        byte[] bcomm = getEntryBytes(jzentry, JZENTRY_COMMENT);
        if (bcomm == null) {
            e.comment = null;
        } else {
            if (!zc.isUTF8() && (e.flag & EFS) != 0) {
                e.comment = zc.toStringUTF8(bcomm, bcomm.length);
            } else {
                e.comment = zc.toString(bcomm, bcomm.length);
            }
        }
        return e;
    }

D
duke 已提交
518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541
    private static native long getNextEntry(long jzfile, int i);

    /**
     * Returns the number of entries in the ZIP file.
     * @return the number of entries in the ZIP file
     * @throws IllegalStateException if the zip file has been closed
     */
    public int size() {
        ensureOpen();
        return total;
    }

    /**
     * Closes the ZIP file.
     * <p> Closing this ZIP file will close all of the input streams
     * previously returned by invocations of the {@link #getInputStream
     * getInputStream} method.
     *
     * @throws IOException if an I/O error has occurred
     */
    public void close() throws IOException {
        synchronized (this) {
            closeRequested = true;

542 543 544 545 546 547 548
            if (streams.size() !=0) {
                Set<ZipFileInputStream> copy = streams;
                streams = new HashSet<ZipFileInputStream>();
                for (ZipFileInputStream is: copy)
                    is.close();
            }

D
duke 已提交
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
            if (jzfile != 0) {
                // Close the zip file
                long zf = this.jzfile;
                jzfile = 0;

                close(zf);

                // Release inflaters
                synchronized (inflaters) {
                    int size = inflaters.size();
                    for (int i = 0; i < size; i++) {
                        Inflater inf = (Inflater)inflaters.get(i);
                        inf.end();
                    }
                }
            }
        }
    }


    /**
     * Ensures that the <code>close</code> method of this ZIP file is
     * called when there are no more references to it.
     *
     * <p>
     * Since the time when GC would invoke this method is undetermined,
     * it is strongly recommended that applications invoke the <code>close</code>
     * method as soon they have finished accessing this <code>ZipFile</code>.
     * This will prevent holding up system resources for an undetermined
     * length of time.
     *
     * @throws IOException if an I/O error has occurred
     * @see    java.util.zip.ZipFile#close()
     */
    protected void finalize() throws IOException {
        close();
    }

    private static native void close(long jzfile);

    private void ensureOpen() {
        if (closeRequested) {
            throw new IllegalStateException("zip file closed");
        }

        if (jzfile == 0) {
            throw new IllegalStateException("The object is not initialized.");
        }
    }

    private void ensureOpenOrZipException() throws IOException {
        if (closeRequested) {
            throw new ZipException("ZipFile closed");
        }
    }

    /*
     * Inner class implementing the input stream used to read a
     * (possibly compressed) zip file entry.
     */
   private class ZipFileInputStream extends InputStream {
        protected long jzentry; // address of jzentry data
        private   long pos;     // current position within entry data
        protected long rem;     // number of remaining bytes within entry
        protected long size;    // uncompressed size of this entry

        ZipFileInputStream(long jzentry) {
            pos = 0;
617 618
            rem = getEntryCSize(jzentry);
            size = getEntrySize(jzentry);
D
duke 已提交
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
            this.jzentry = jzentry;
        }

        public int read(byte b[], int off, int len) throws IOException {
            if (rem == 0) {
                return -1;
            }
            if (len <= 0) {
                return 0;
            }
            if (len > rem) {
                len = (int) rem;
            }
            synchronized (ZipFile.this) {
                ensureOpenOrZipException();

                len = ZipFile.read(ZipFile.this.jzfile, jzentry, pos, b,
                                   off, len);
            }
            if (len > 0) {
                pos += len;
                rem -= len;
            }
            if (rem == 0) {
                close();
            }
            return len;
        }

        public int read() throws IOException {
            byte[] b = new byte[1];
            if (read(b, 0, 1) == 1) {
                return b[0] & 0xff;
            } else {
                return -1;
            }
        }

        public long skip(long n) {
            if (n > rem)
                n = rem;
            pos += n;
            rem -= n;
            if (rem == 0) {
                close();
            }
            return n;
        }

        public int available() {
            return rem > Integer.MAX_VALUE ? Integer.MAX_VALUE : (int) rem;
        }

        public long size() {
            return size;
        }

        public void close() {
            rem = 0;
            synchronized (ZipFile.this) {
                if (jzentry != 0 && ZipFile.this.jzfile != 0) {
                    freeEntry(ZipFile.this.jzfile, jzentry);
                    jzentry = 0;
                }
683
                streams.remove(this);
D
duke 已提交
684 685 686 687
            }
        }
    }

688

689 690
    private static native long open(String name, int mode, long lastModified,
                                    boolean usemmap) throws IOException;
691
    private static native int getTotal(long jzfile);
D
duke 已提交
692 693 694
    private static native int read(long jzfile, long jzentry,
                                   long pos, byte[] b, int off, int len);

695 696 697 698 699 700 701
    // access to the native zentry object
    private static native long getEntryTime(long jzentry);
    private static native long getEntryCrc(long jzentry);
    private static native long getEntryCSize(long jzentry);
    private static native long getEntrySize(long jzentry);
    private static native int getEntryMethod(long jzentry);
    private static native int getEntryFlag(long jzentry);
702
    private static native byte[] getCommentBytes(long jzfile);
D
duke 已提交
703

704 705 706 707
    private static final int JZENTRY_NAME = 0;
    private static final int JZENTRY_EXTRA = 1;
    private static final int JZENTRY_COMMENT = 2;
    private static native byte[] getEntryBytes(long jzentry, int type);
D
duke 已提交
708 709 710

    private static native String getZipMessage(long jzfile);
}