| /* |
| * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved. |
| * 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 |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| * |
| * 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. |
| */ |
| |
| package jdk.nio.zipfs; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.time.Instant; |
| import java.time.LocalDateTime; |
| import java.time.ZoneId; |
| import java.util.Arrays; |
| import java.util.regex.PatternSyntaxException; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * |
| * @author Xueming Shen |
| */ |
| |
| class ZipUtils { |
| |
| /* |
| * Writes a 16-bit short to the output stream in little-endian byte order. |
| */ |
| public static void writeShort(OutputStream os, int v) throws IOException { |
| os.write(v & 0xff); |
| os.write((v >>> 8) & 0xff); |
| } |
| |
| /* |
| * Writes a 32-bit int to the output stream in little-endian byte order. |
| */ |
| public static void writeInt(OutputStream os, long v) throws IOException { |
| os.write((int)(v & 0xff)); |
| os.write((int)((v >>> 8) & 0xff)); |
| os.write((int)((v >>> 16) & 0xff)); |
| os.write((int)((v >>> 24) & 0xff)); |
| } |
| |
| /* |
| * Writes a 64-bit int to the output stream in little-endian byte order. |
| */ |
| public static void writeLong(OutputStream os, long v) throws IOException { |
| os.write((int)(v & 0xff)); |
| os.write((int)((v >>> 8) & 0xff)); |
| os.write((int)((v >>> 16) & 0xff)); |
| os.write((int)((v >>> 24) & 0xff)); |
| os.write((int)((v >>> 32) & 0xff)); |
| os.write((int)((v >>> 40) & 0xff)); |
| os.write((int)((v >>> 48) & 0xff)); |
| os.write((int)((v >>> 56) & 0xff)); |
| } |
| |
| /* |
| * Writes an array of bytes to the output stream. |
| */ |
| public static void writeBytes(OutputStream os, byte[] b) |
| throws IOException |
| { |
| os.write(b, 0, b.length); |
| } |
| |
| /* |
| * Writes an array of bytes to the output stream. |
| */ |
| public static void writeBytes(OutputStream os, byte[] b, int off, int len) |
| throws IOException |
| { |
| os.write(b, off, len); |
| } |
| |
| /* |
| * Append a slash at the end, if it does not have one yet |
| */ |
| public static byte[] toDirectoryPath(byte[] dir) { |
| if (dir.length != 0 && dir[dir.length - 1] != '/') { |
| dir = Arrays.copyOf(dir, dir.length + 1); |
| dir[dir.length - 1] = '/'; |
| } |
| return dir; |
| } |
| |
| /* |
| * Converts DOS time to Java time (number of milliseconds since epoch). |
| */ |
| public static long dosToJavaTime(long dtime) { |
| int year; |
| int month; |
| int day; |
| int hour = (int) ((dtime >> 11) & 0x1f); |
| int minute = (int) ((dtime >> 5) & 0x3f); |
| int second = (int) ((dtime << 1) & 0x3e); |
| if ((dtime >> 16) == 0) { |
| // Interpret the 0 DOS date as 1979-11-30 for compatibility with |
| // other implementations. |
| year = 1979; |
| month = 11; |
| day = 30; |
| } else { |
| year = (int) (((dtime >> 25) & 0x7f) + 1980); |
| month = (int) ((dtime >> 21) & 0x0f); |
| day = (int) ((dtime >> 16) & 0x1f); |
| } |
| LocalDateTime ldt = LocalDateTime.of(year, month, day, hour, minute, second); |
| return TimeUnit.MILLISECONDS.convert(ldt.toEpochSecond( |
| ZoneId.systemDefault().getRules().getOffset(ldt)), TimeUnit.SECONDS); |
| } |
| |
| /* |
| * Converts Java time to DOS time. |
| */ |
| public static long javaToDosTime(long time) { |
| Instant instant = Instant.ofEpochMilli(time); |
| LocalDateTime ldt = LocalDateTime.ofInstant( |
| instant, ZoneId.systemDefault()); |
| int year = ldt.getYear() - 1980; |
| if (year < 0) { |
| return (1 << 21) | (1 << 16); |
| } |
| return (year << 25 | |
| ldt.getMonthValue() << 21 | |
| ldt.getDayOfMonth() << 16 | |
| ldt.getHour() << 11 | |
| ldt.getMinute() << 5 | |
| ldt.getSecond() >> 1) & 0xffffffffL; |
| } |
| |
| |
| // used to adjust values between Windows and java epoch |
| private static final long WINDOWS_EPOCH_IN_MICROSECONDS = -11644473600000000L; |
| public static final long winToJavaTime(long wtime) { |
| return TimeUnit.MILLISECONDS.convert( |
| wtime / 10 + WINDOWS_EPOCH_IN_MICROSECONDS, TimeUnit.MICROSECONDS); |
| } |
| |
| public static final long javaToWinTime(long time) { |
| return (TimeUnit.MICROSECONDS.convert(time, TimeUnit.MILLISECONDS) |
| - WINDOWS_EPOCH_IN_MICROSECONDS) * 10; |
| } |
| |
| public static final long unixToJavaTime(long utime) { |
| return TimeUnit.MILLISECONDS.convert(utime, TimeUnit.SECONDS); |
| } |
| |
| public static final long javaToUnixTime(long time) { |
| return TimeUnit.SECONDS.convert(time, TimeUnit.MILLISECONDS); |
| } |
| |
| private static final String regexMetaChars = ".^$+{[]|()"; |
| private static final String globMetaChars = "\\*?[{"; |
| private static boolean isRegexMeta(char c) { |
| return regexMetaChars.indexOf(c) != -1; |
| } |
| private static boolean isGlobMeta(char c) { |
| return globMetaChars.indexOf(c) != -1; |
| } |
| private static char EOL = 0; //TBD |
| private static char next(String glob, int i) { |
| if (i < glob.length()) { |
| return glob.charAt(i); |
| } |
| return EOL; |
| } |
| |
| /* |
| * Creates a regex pattern from the given glob expression. |
| * |
| * @throws PatternSyntaxException |
| */ |
| public static String toRegexPattern(String globPattern) { |
| boolean inGroup = false; |
| StringBuilder regex = new StringBuilder("^"); |
| |
| int i = 0; |
| while (i < globPattern.length()) { |
| char c = globPattern.charAt(i++); |
| switch (c) { |
| case '\\': |
| // escape special characters |
| if (i == globPattern.length()) { |
| throw new PatternSyntaxException("No character to escape", |
| globPattern, i - 1); |
| } |
| char next = globPattern.charAt(i++); |
| if (isGlobMeta(next) || isRegexMeta(next)) { |
| regex.append('\\'); |
| } |
| regex.append(next); |
| break; |
| case '/': |
| regex.append(c); |
| break; |
| case '[': |
| // don't match name separator in class |
| regex.append("[[^/]&&["); |
| if (next(globPattern, i) == '^') { |
| // escape the regex negation char if it appears |
| regex.append("\\^"); |
| i++; |
| } else { |
| // negation |
| if (next(globPattern, i) == '!') { |
| regex.append('^'); |
| i++; |
| } |
| // hyphen allowed at start |
| if (next(globPattern, i) == '-') { |
| regex.append('-'); |
| i++; |
| } |
| } |
| boolean hasRangeStart = false; |
| char last = 0; |
| while (i < globPattern.length()) { |
| c = globPattern.charAt(i++); |
| if (c == ']') { |
| break; |
| } |
| if (c == '/') { |
| throw new PatternSyntaxException("Explicit 'name separator' in class", |
| globPattern, i - 1); |
| } |
| // TBD: how to specify ']' in a class? |
| if (c == '\\' || c == '[' || |
| c == '&' && next(globPattern, i) == '&') { |
| // escape '\', '[' or "&&" for regex class |
| regex.append('\\'); |
| } |
| regex.append(c); |
| |
| if (c == '-') { |
| if (!hasRangeStart) { |
| throw new PatternSyntaxException("Invalid range", |
| globPattern, i - 1); |
| } |
| if ((c = next(globPattern, i++)) == EOL || c == ']') { |
| break; |
| } |
| if (c < last) { |
| throw new PatternSyntaxException("Invalid range", |
| globPattern, i - 3); |
| } |
| regex.append(c); |
| hasRangeStart = false; |
| } else { |
| hasRangeStart = true; |
| last = c; |
| } |
| } |
| if (c != ']') { |
| throw new PatternSyntaxException("Missing ']", globPattern, i - 1); |
| } |
| regex.append("]]"); |
| break; |
| case '{': |
| if (inGroup) { |
| throw new PatternSyntaxException("Cannot nest groups", |
| globPattern, i - 1); |
| } |
| regex.append("(?:(?:"); |
| inGroup = true; |
| break; |
| case '}': |
| if (inGroup) { |
| regex.append("))"); |
| inGroup = false; |
| } else { |
| regex.append('}'); |
| } |
| break; |
| case ',': |
| if (inGroup) { |
| regex.append(")|(?:"); |
| } else { |
| regex.append(','); |
| } |
| break; |
| case '*': |
| if (next(globPattern, i) == '*') { |
| // crosses directory boundaries |
| regex.append(".*"); |
| i++; |
| } else { |
| // within directory boundary |
| regex.append("[^/]*"); |
| } |
| break; |
| case '?': |
| regex.append("[^/]"); |
| break; |
| default: |
| if (isRegexMeta(c)) { |
| regex.append('\\'); |
| } |
| regex.append(c); |
| } |
| } |
| if (inGroup) { |
| throw new PatternSyntaxException("Missing '}", globPattern, i - 1); |
| } |
| return regex.append('$').toString(); |
| } |
| } |