author | sherman |
Thu, 08 Aug 2013 12:03:04 -0700 | |
changeset 19374 | 6773349693eb |
parent 17910 | 82d10099a8a6 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.util.zip; |
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import java.nio.file.attribute.FileTime; |
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import java.util.Date; |
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import java.util.concurrent.TimeUnit; |
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import static java.util.zip.ZipConstants.*; |
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import static java.util.zip.ZipConstants64.*; |
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class ZipUtils { |
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// used to adjust values between Windows and java epoch |
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private static final long WINDOWS_EPOCH_IN_MICROSECONDS = -11644473600000000L; |
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/** |
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* Converts Windows time (in microseconds, UTC/GMT) time to FileTime. |
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*/ |
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public static final FileTime winTimeToFileTime(long wtime) { |
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return FileTime.from(wtime / 10 + WINDOWS_EPOCH_IN_MICROSECONDS, |
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TimeUnit.MICROSECONDS); |
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} |
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/** |
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* Converts FileTime to Windows time. |
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*/ |
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public static final long fileTimeToWinTime(FileTime ftime) { |
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return (ftime.to(TimeUnit.MICROSECONDS) - WINDOWS_EPOCH_IN_MICROSECONDS) * 10; |
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} |
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/** |
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* Converts "standard Unix time"(in seconds, UTC/GMT) to FileTime |
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*/ |
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public static final FileTime unixTimeToFileTime(long utime) { |
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return FileTime.from(utime, TimeUnit.SECONDS); |
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} |
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/** |
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* Converts FileTime to "standard Unix time". |
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*/ |
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public static final long fileTimeToUnixTime(FileTime ftime) { |
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return ftime.to(TimeUnit.SECONDS); |
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} |
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/** |
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* Converts DOS time to Java time (number of milliseconds since epoch). |
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*/ |
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public static long dosToJavaTime(long dtime) { |
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@SuppressWarnings("deprecation") // Use of date constructor. |
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Date d = new Date((int)(((dtime >> 25) & 0x7f) + 80), |
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(int)(((dtime >> 21) & 0x0f) - 1), |
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(int)((dtime >> 16) & 0x1f), |
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(int)((dtime >> 11) & 0x1f), |
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(int)((dtime >> 5) & 0x3f), |
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(int)((dtime << 1) & 0x3e)); |
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return d.getTime(); |
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} |
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/** |
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* Converts Java time to DOS time. |
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*/ |
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@SuppressWarnings("deprecation") // Use of date methods |
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public static long javaToDosTime(long time) { |
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Date d = new Date(time); |
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int year = d.getYear() + 1900; |
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if (year < 1980) { |
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return (1 << 21) | (1 << 16); |
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} |
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return (year - 1980) << 25 | (d.getMonth() + 1) << 21 | |
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d.getDate() << 16 | d.getHours() << 11 | d.getMinutes() << 5 | |
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d.getSeconds() >> 1; |
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} |
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/** |
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* Fetches unsigned 16-bit value from byte array at specified offset. |
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* The bytes are assumed to be in Intel (little-endian) byte order. |
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*/ |
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public static final int get16(byte b[], int off) { |
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return Byte.toUnsignedInt(b[off]) | (Byte.toUnsignedInt(b[off+1]) << 8); |
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} |
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/** |
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* Fetches unsigned 32-bit value from byte array at specified offset. |
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* The bytes are assumed to be in Intel (little-endian) byte order. |
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*/ |
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public static final long get32(byte b[], int off) { |
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return (get16(b, off) | ((long)get16(b, off+2) << 16)) & 0xffffffffL; |
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} |
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/** |
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* Fetches signed 64-bit value from byte array at specified offset. |
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* The bytes are assumed to be in Intel (little-endian) byte order. |
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*/ |
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public static final long get64(byte b[], int off) { |
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return get32(b, off) | (get32(b, off+4) << 32); |
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} |
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} |