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.util.Date;
30 import java.util.concurrent.TimeUnit;
31
32 class ZipUtils {
33
34 // used to adjust values between Windows and java epoch
35 private static final long WINDOWS_EPOCH_IN_MICROSECONDS = -11644473600000000L;
36
37 /**
38 * Converts Windows time (in microseconds, UTC/GMT) time to FileTime.
39 */
40 public static final FileTime winTimeToFileTime(long wtime) {
41 return FileTime.from(wtime / 10 + WINDOWS_EPOCH_IN_MICROSECONDS,
42 TimeUnit.MICROSECONDS);
43 }
44
45 /**
46 * Converts FileTime to Windows time.
47 */
48 public static final long fileTimeToWinTime(FileTime ftime) {
49 return (ftime.to(TimeUnit.MICROSECONDS) - WINDOWS_EPOCH_IN_MICROSECONDS) * 10;
50 }
51
52 /**
53 * Converts "standard Unix time"(in seconds, UTC/GMT) to FileTime
54 */
55 public static final FileTime unixTimeToFileTime(long utime) {
56 return FileTime.from(utime, TimeUnit.SECONDS);
57 }
58
59 /**
60 * Converts FileTime to "standard Unix time".
61 */
62 public static final long fileTimeToUnixTime(FileTime ftime) {
63 return ftime.to(TimeUnit.SECONDS);
64 }
65
66 /**
67 * Converts DOS time to Java time (number of milliseconds since epoch).
68 */
69 private static long dosToJavaTime(long dtime) {
70 @SuppressWarnings("deprecation") // Use of date constructor.
71 Date d = new Date((int)(((dtime >> 25) & 0x7f) + 80),
72 (int)(((dtime >> 21) & 0x0f) - 1),
73 (int)((dtime >> 16) & 0x1f),
74 (int)((dtime >> 11) & 0x1f),
75 (int)((dtime >> 5) & 0x3f),
76 (int)((dtime << 1) & 0x3e));
77 return d.getTime();
78 }
79
80 /**
81 * Converts extended DOS time to Java time, where up to 1999 milliseconds
82 * might be encoded into the upper half of the returned long.
83 *
84 * @param xdostime the extended DOS time value
85 * @return milliseconds since epoch
86 */
87 public static long extendedDosToJavaTime(long xdostime) {
88 long time = dosToJavaTime(xdostime);
89 return time + (xdostime >> 32);
90 }
91
92 /**
93 * Converts Java time to DOS time.
94 */
95 @SuppressWarnings("deprecation") // Use of date methods
96 private static long javaToDosTime(long time) {
97 Date d = new Date(time);
98 int year = d.getYear() + 1900;
99 if (year < 1980) {
100 return ZipEntry.DOSTIME_BEFORE_1980;
101 }
102 return ((year - 1980) << 25 | (d.getMonth() + 1) << 21 |
103 d.getDate() << 16 | d.getHours() << 11 | d.getMinutes() << 5 |
104 d.getSeconds() >> 1) & 0xffffffffL;
105 }
106
107 /**
108 * Converts Java time to DOS time, encoding any milliseconds lost
109 * in the conversion into the upper half of the returned long.
110 *
111 * @param time milliseconds since epoch
112 * @return DOS time with 2s remainder encoded into upper half
113 */
114 public static long javaToExtendedDosTime(long time) {
115 if (time < 0) {
116 return ZipEntry.DOSTIME_BEFORE_1980;
117 }
118 long dostime = javaToDosTime(time);
119 return (dostime != ZipEntry.DOSTIME_BEFORE_1980)
120 ? dostime + ((time % 2000) << 32)
121 : ZipEntry.DOSTIME_BEFORE_1980;
122 }
123
124 /**
|
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.time.Instant;
30 import java.time.LocalDateTime;
31 import java.time.ZoneId;
32 import java.util.concurrent.TimeUnit;
33
34 class ZipUtils {
35
36 // used to adjust values between Windows and java epoch
37 private static final long WINDOWS_EPOCH_IN_MICROSECONDS = -11644473600000000L;
38
39 /**
40 * Converts Windows time (in microseconds, UTC/GMT) time to FileTime.
41 */
42 public static final FileTime winTimeToFileTime(long wtime) {
43 return FileTime.from(wtime / 10 + WINDOWS_EPOCH_IN_MICROSECONDS,
44 TimeUnit.MICROSECONDS);
45 }
46
47 /**
48 * Converts FileTime to Windows time.
49 */
50 public static final long fileTimeToWinTime(FileTime ftime) {
51 return (ftime.to(TimeUnit.MICROSECONDS) - WINDOWS_EPOCH_IN_MICROSECONDS) * 10;
52 }
53
54 /**
55 * Converts "standard Unix time"(in seconds, UTC/GMT) to FileTime
56 */
57 public static final FileTime unixTimeToFileTime(long utime) {
58 return FileTime.from(utime, TimeUnit.SECONDS);
59 }
60
61 /**
62 * Converts FileTime to "standard Unix time".
63 */
64 public static final long fileTimeToUnixTime(FileTime ftime) {
65 return ftime.to(TimeUnit.SECONDS);
66 }
67
68 /**
69 * Converts DOS time to Java time (number of milliseconds since epoch).
70 */
71 public static long dosToJavaTime(long dtime) {
72 LocalDateTime ldt = LocalDateTime.of(
73 (int) (((dtime >> 25) & 0x7f) + 1980),
74 (int) ((dtime >> 21) & 0x0f),
75 (int) ((dtime >> 16) & 0x1f),
76 (int) ((dtime >> 11) & 0x1f),
77 (int) ((dtime >> 5) & 0x3f),
78 (int) ((dtime << 1) & 0x3e));
79 return ldt.toEpochSecond(
80 ZoneId.systemDefault().getRules().getOffset(ldt)) * 1000L;
81 }
82
83 /**
84 * Converts extended DOS time to Java time, where up to 1999 milliseconds
85 * might be encoded into the upper half of the returned long.
86 *
87 * @param xdostime the extended DOS time value
88 * @return milliseconds since epoch
89 */
90 public static long extendedDosToJavaTime(long xdostime) {
91 long time = dosToJavaTime(xdostime);
92 return time + (xdostime >> 32);
93 }
94
95 /**
96 * Converts Java time to DOS time.
97 */
98 private static long javaToDosTime(long time) {
99 Instant instant = Instant.ofEpochMilli(time);
100 LocalDateTime ldt = LocalDateTime.ofInstant(
101 instant, ZoneId.systemDefault());
102 int year = ldt.getYear() - 1980;
103 if (year < 0) {
104 return (1 << 21) | (1 << 16);
105 }
106 return (year << 25 |
107 ldt.getMonthValue() << 21 |
108 ldt.getDayOfMonth() << 16 |
109 ldt.getHour() << 11 |
110 ldt.getMinute() << 5 |
111 ldt.getSecond() >> 1) & 0xffffffffL;
112 }
113
114 /**
115 * Converts Java time to DOS time, encoding any milliseconds lost
116 * in the conversion into the upper half of the returned long.
117 *
118 * @param time milliseconds since epoch
119 * @return DOS time with 2s remainder encoded into upper half
120 */
121 public static long javaToExtendedDosTime(long time) {
122 if (time < 0) {
123 return ZipEntry.DOSTIME_BEFORE_1980;
124 }
125 long dostime = javaToDosTime(time);
126 return (dostime != ZipEntry.DOSTIME_BEFORE_1980)
127 ? dostime + ((time % 2000) << 32)
128 : ZipEntry.DOSTIME_BEFORE_1980;
129 }
130
131 /**
|