1 /*
2 * Copyright (c) 2013, 2017, 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.nio.file.attribute.FileTime;
29 import java.security.AccessController;
30 import java.security.PrivilegedAction;
31 import java.time.DateTimeException;
32 import java.time.Instant;
33 import java.time.LocalDateTime;
34 import java.time.ZoneId;
35 import java.util.Date;
36 import java.util.concurrent.TimeUnit;
37
38 import static java.util.zip.ZipConstants.ENDHDR;
39
40 class ZipUtils {
41
42 // used to adjust values between Windows and java epoch
43 private static final long WINDOWS_EPOCH_IN_MICROSECONDS = -11644473600000000L;
44
45 // used to indicate the corresponding windows time is not available
46 public static final long WINDOWS_TIME_NOT_AVAILABLE = Long.MIN_VALUE;
47
48 /**
49 * Converts Windows time (in microseconds, UTC/GMT) time to FileTime.
50 */
51 public static final FileTime winTimeToFileTime(long wtime) {
52 return FileTime.from(wtime / 10 + WINDOWS_EPOCH_IN_MICROSECONDS,
53 TimeUnit.MICROSECONDS);
54 }
55
56 /**
57 * Converts FileTime to Windows time.
58 */
59 public static final long fileTimeToWinTime(FileTime ftime) {
60 return (ftime.to(TimeUnit.MICROSECONDS) - WINDOWS_EPOCH_IN_MICROSECONDS) * 10;
61 }
62
63 /**
64 * The upper bound of the 32-bit unix time, the "year 2038 problem".
65 */
66 public static final long UPPER_UNIXTIME_BOUND = 0x7fffffff;
67
264 static final int CENATT(byte[] b, int pos) { return SH(b, pos + 36);}
265 static final long CENATX(byte[] b, int pos) { return LG(b, pos + 38);}
266 static final long CENOFF(byte[] b, int pos) { return LG(b, pos + 42);}
267
268 // The END header is followed by a variable length comment of size < 64k.
269 static final long END_MAXLEN = 0xFFFF + ENDHDR;
270 static final int READBLOCKSZ = 128;
271
272 /**
273 * Loads zip native library, if not already laoded
274 */
275 static void loadLibrary() {
276 SecurityManager sm = System.getSecurityManager();
277 if (sm == null) {
278 System.loadLibrary("zip");
279 } else {
280 PrivilegedAction<Void> pa = () -> { System.loadLibrary("zip"); return null; };
281 AccessController.doPrivileged(pa);
282 }
283 }
284 }
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1 /*
2 * Copyright (c) 2013, 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.nio.Buffer;
29 import java.nio.ByteBuffer;
30 import java.nio.file.attribute.FileTime;
31 import java.security.AccessController;
32 import java.security.PrivilegedAction;
33 import java.time.DateTimeException;
34 import java.time.Instant;
35 import java.time.LocalDateTime;
36 import java.time.ZoneId;
37 import java.util.Date;
38 import java.util.concurrent.TimeUnit;
39
40 import static java.util.zip.ZipConstants.ENDHDR;
41
42 import jdk.internal.misc.Unsafe;
43 import sun.nio.ch.DirectBuffer;
44
45 class ZipUtils {
46
47 // used to adjust values between Windows and java epoch
48 private static final long WINDOWS_EPOCH_IN_MICROSECONDS = -11644473600000000L;
49
50 // used to indicate the corresponding windows time is not available
51 public static final long WINDOWS_TIME_NOT_AVAILABLE = Long.MIN_VALUE;
52
53 // static final ByteBuffer defaultBuf = ByteBuffer.allocateDirect(0);
54 static final ByteBuffer defaultBuf = ByteBuffer.allocate(0);
55
56 /**
57 * Converts Windows time (in microseconds, UTC/GMT) time to FileTime.
58 */
59 public static final FileTime winTimeToFileTime(long wtime) {
60 return FileTime.from(wtime / 10 + WINDOWS_EPOCH_IN_MICROSECONDS,
61 TimeUnit.MICROSECONDS);
62 }
63
64 /**
65 * Converts FileTime to Windows time.
66 */
67 public static final long fileTimeToWinTime(FileTime ftime) {
68 return (ftime.to(TimeUnit.MICROSECONDS) - WINDOWS_EPOCH_IN_MICROSECONDS) * 10;
69 }
70
71 /**
72 * The upper bound of the 32-bit unix time, the "year 2038 problem".
73 */
74 public static final long UPPER_UNIXTIME_BOUND = 0x7fffffff;
75
272 static final int CENATT(byte[] b, int pos) { return SH(b, pos + 36);}
273 static final long CENATX(byte[] b, int pos) { return LG(b, pos + 38);}
274 static final long CENOFF(byte[] b, int pos) { return LG(b, pos + 42);}
275
276 // The END header is followed by a variable length comment of size < 64k.
277 static final long END_MAXLEN = 0xFFFF + ENDHDR;
278 static final int READBLOCKSZ = 128;
279
280 /**
281 * Loads zip native library, if not already laoded
282 */
283 static void loadLibrary() {
284 SecurityManager sm = System.getSecurityManager();
285 if (sm == null) {
286 System.loadLibrary("zip");
287 } else {
288 PrivilegedAction<Void> pa = () -> { System.loadLibrary("zip"); return null; };
289 AccessController.doPrivileged(pa);
290 }
291 }
292
293 private static final Unsafe unsafe = Unsafe.getUnsafe();
294
295 private static final long byteBufferArrayOffset = unsafe.objectFieldOffset(ByteBuffer.class, "hb");
296 private static final long byteBufferOffsetOffset = unsafe.objectFieldOffset(ByteBuffer.class, "offset");
297
298 static byte[] getBufferArray(ByteBuffer byteBuffer) {
299 return (byte[]) unsafe.getObject(byteBuffer, byteBufferArrayOffset);
300 }
301
302 static int getBufferOffset(ByteBuffer byteBuffer) {
303 return unsafe.getInt(byteBuffer, byteBufferOffsetOffset);
304 }
305 }
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