| // Copyright 2015 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| package com.google.devtools.build.android.ziputils; |
| |
| import java.util.Calendar; |
| import java.util.Date; |
| import java.util.GregorianCalendar; |
| |
| /** |
| * This class supports conversion from a {@code java.util.Date} object, to a |
| * 4 bytes DOS date and time representation. |
| */ |
| public final class DosTime { |
| |
| /** |
| * DOS representation of DOS epoch (1980-01-01) + epsilon. |
| * |
| * <p>NB: we avoid exact midnight since |
| * http://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8246129 causes the local timezone to be |
| * leaked into the ZIP file. |
| */ |
| public static final DosTime EPOCHISH; |
| /** {@code java.util.Date} for DOS epoch */ |
| public static final Date DOS_EPOCHISH; |
| |
| private static final Calendar calendar; |
| |
| /** |
| * DOS representation of date passed to constructor. |
| * Time is lower the 16 bit, date the upper 16 bit. |
| */ |
| public final int time; |
| |
| /** |
| * Creates a DOS representation of the given date. |
| * @param date date to represent in DOS format. |
| */ |
| public DosTime(Date date) { |
| this.time = dateToDosTime(date); |
| } |
| |
| static { |
| calendar = new GregorianCalendar(1980, 0, 1, /*hrs=*/ 0, /*min=*/ 1); |
| DOS_EPOCHISH = calendar.getTime(); |
| EPOCHISH = new DosTime(DOS_EPOCHISH); |
| } |
| |
| private static synchronized int dateToDosTime(Date date) { |
| calendar.setTime(date); |
| int year = calendar.get(Calendar.YEAR); |
| if (year < 1980) { |
| throw new IllegalArgumentException("date must be in or after 1980"); |
| } |
| if (year > 2107) { |
| throw new IllegalArgumentException("date must be before 2107"); |
| } |
| int month = calendar.get(Calendar.MONTH) + 1; |
| int day = calendar.get(Calendar.DAY_OF_MONTH); |
| int hour = calendar.get(Calendar.HOUR_OF_DAY); |
| int minute = calendar.get(Calendar.MINUTE); |
| int second = calendar.get(Calendar.SECOND); |
| return ((year - 1980) << 25) | (month << 21) | (day << 16) |
| | (hour << 11) | (minute << 5) | (second >> 1); |
| } |
| } |