1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/rt/emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/zip/FastJar.java Tue Feb 26 16:54:16 2013 +0100
1.3 @@ -0,0 +1,175 @@
1.4 +/*
1.5 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
1.6 + *
1.7 + * Copyright 1997-2010 Oracle and/or its affiliates. All rights reserved.
1.8 + *
1.9 + * Oracle and Java are registered trademarks of Oracle and/or its affiliates.
1.10 + * Other names may be trademarks of their respective owners.
1.11 + *
1.12 + * The contents of this file are subject to the terms of either the GNU
1.13 + * General Public License Version 2 only ("GPL") or the Common
1.14 + * Development and Distribution License("CDDL") (collectively, the
1.15 + * "License"). You may not use this file except in compliance with the
1.16 + * License. You can obtain a copy of the License at
1.17 + * http://www.netbeans.org/cddl-gplv2.html
1.18 + * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
1.19 + * specific language governing permissions and limitations under the
1.20 + * License. When distributing the software, include this License Header
1.21 + * Notice in each file and include the License file at
1.22 + * nbbuild/licenses/CDDL-GPL-2-CP. Oracle designates this
1.23 + * particular file as subject to the "Classpath" exception as provided
1.24 + * by Oracle in the GPL Version 2 section of the License file that
1.25 + * accompanied this code. If applicable, add the following below the
1.26 + * License Header, with the fields enclosed by brackets [] replaced by
1.27 + * your own identifying information:
1.28 + * "Portions Copyrighted [year] [name of copyright owner]"
1.29 + *
1.30 + * Contributor(s):
1.31 + *
1.32 + * Portions Copyrighted 2007 Sun Microsystems, Inc.
1.33 + */
1.34 +package org.apidesign.bck2brwsr.emul.zip;
1.35 +
1.36 +import java.io.ByteArrayInputStream;
1.37 +import java.io.IOException;
1.38 +import java.io.InputStream;
1.39 +import java.util.zip.ZipEntry;
1.40 +import java.util.zip.ZipInputStream;
1.41 +
1.42 +/**
1.43 + *
1.44 + * @author Tomas Zezula
1.45 + */
1.46 +public final class FastJar {
1.47 + private final byte[] arr;
1.48 +
1.49 + public FastJar(byte[] arr) {
1.50 + this.arr = arr;
1.51 + }
1.52 +
1.53 +
1.54 + private static final int GIVE_UP = 1<<16;
1.55 +
1.56 + public static final class Entry {
1.57 +
1.58 + public final String name;
1.59 + final long offset;
1.60 + private final long dosTime;
1.61 +
1.62 + Entry (String name, long offset, long time) {
1.63 + assert name != null;
1.64 + this.name = name;
1.65 + this.offset = offset;
1.66 + this.dosTime = time;
1.67 + }
1.68 +/*
1.69 + public long getTime () {
1.70 + Date d = new Date((int)(((dosTime >> 25) & 0x7f) + 80),
1.71 + (int)(((dosTime >> 21) & 0x0f) - 1),
1.72 + (int)((dosTime >> 16) & 0x1f),
1.73 + (int)((dosTime >> 11) & 0x1f),
1.74 + (int)((dosTime >> 5) & 0x3f),
1.75 + (int)((dosTime << 1) & 0x3e));
1.76 + return d.getTime();
1.77 + }
1.78 + */
1.79 + }
1.80 +
1.81 + public InputStream getInputStream (final Entry e) throws IOException {
1.82 + return getInputStream(arr, e.offset);
1.83 + }
1.84 +
1.85 + private static InputStream getInputStream (byte[] arr, final long offset) throws IOException {
1.86 + ByteArrayInputStream is = new ByteArrayInputStream(arr);
1.87 + is.skip(offset);
1.88 + ZipInputStream in = new ZipInputStream (is);
1.89 + ZipEntry e = in.getNextEntry();
1.90 + if (e != null && e.getCrc() == 0L && e.getMethod() == ZipEntry.STORED) {
1.91 + int cp = arr.length - is.available();
1.92 + return new ByteArrayInputStream(arr, cp, (int)e.getSize());
1.93 + }
1.94 + return in;
1.95 + }
1.96 +
1.97 + public Entry[] list() throws IOException {
1.98 + final int size = arr.length;
1.99 +
1.100 + int at = size - ZipInputStream.ENDHDR;
1.101 +
1.102 + byte[] data = new byte[ZipInputStream.ENDHDR];
1.103 + int giveup = 0;
1.104 +
1.105 + do {
1.106 + org.apidesign.bck2brwsr.emul.lang.System.arraycopy(arr, at, data, 0, data.length);
1.107 + at--;
1.108 + giveup++;
1.109 + if (giveup > GIVE_UP) {
1.110 + throw new IOException ();
1.111 + }
1.112 + } while (getsig(data) != ZipInputStream.ENDSIG);
1.113 +
1.114 +
1.115 + final long censize = endsiz(data);
1.116 + final long cenoff = endoff(data);
1.117 + at = (int) cenoff;
1.118 +
1.119 + Entry[] result = new Entry[0];
1.120 + int cenread = 0;
1.121 + data = new byte[ZipInputStream.CENHDR];
1.122 + while (cenread < censize) {
1.123 + org.apidesign.bck2brwsr.emul.lang.System.arraycopy(arr, at, data, 0, data.length);
1.124 + at += data.length;
1.125 + if (getsig(data) != ZipInputStream.CENSIG) {
1.126 + throw new IOException("No central table"); //NOI18N
1.127 + }
1.128 + int cennam = cennam(data);
1.129 + int cenext = cenext(data);
1.130 + int cencom = cencom(data);
1.131 + long lhoff = cenoff(data);
1.132 + long centim = centim(data);
1.133 + String name = new String(arr, at, cennam, "UTF-8");
1.134 + at += cennam;
1.135 + int seekby = cenext+cencom;
1.136 + int cendatalen = ZipInputStream.CENHDR + cennam + seekby;
1.137 + cenread+=cendatalen;
1.138 + result = addEntry(result, new Entry(name,lhoff, centim));
1.139 + at += seekby;
1.140 + }
1.141 + return result;
1.142 + }
1.143 +
1.144 + private Entry[] addEntry(Entry[] result, Entry entry) {
1.145 + Entry[] e = new Entry[result.length + 1];
1.146 + e[result.length] = entry;
1.147 + org.apidesign.bck2brwsr.emul.lang.System.arraycopy(result, 0, e, 0, result.length);
1.148 + return e;
1.149 + }
1.150 +
1.151 + private static final long getsig(final byte[] b) throws IOException {return get32(b,0);}
1.152 + private static final long endsiz(final byte[] b) throws IOException {return get32(b,ZipInputStream.ENDSIZ);}
1.153 + private static final long endoff(final byte[] b) throws IOException {return get32(b,ZipInputStream.ENDOFF);}
1.154 + private static final long cenlen(final byte[] b) throws IOException {return get32(b,ZipInputStream.CENLEN);}
1.155 + private static final long censiz(final byte[] b) throws IOException {return get32(b,ZipInputStream.CENSIZ);}
1.156 + private static final long centim(final byte[] b) throws IOException {return get32(b,ZipInputStream.CENTIM);}
1.157 + private static final int cennam(final byte[] b) throws IOException {return get16(b,ZipInputStream.CENNAM);}
1.158 + private static final int cenext(final byte[] b) throws IOException {return get16(b,ZipInputStream.CENEXT);}
1.159 + private static final int cencom(final byte[] b) throws IOException {return get16(b,ZipInputStream.CENCOM);}
1.160 + private static final long cenoff (final byte[] b) throws IOException {return get32(b,ZipInputStream.CENOFF);}
1.161 + private static final int lochow(final byte[] b) throws IOException {return get16(b,ZipInputStream.LOCHOW);}
1.162 + private static final int locname(final byte[] b) throws IOException {return get16(b,ZipInputStream.LOCNAM);}
1.163 + private static final int locext(final byte[] b) throws IOException {return get16(b,ZipInputStream.LOCEXT);}
1.164 + private static final long locsiz(final byte[] b) throws IOException {return get32(b,ZipInputStream.LOCSIZ);}
1.165 +
1.166 + private static final int get16(final byte[] b, int off) throws IOException {
1.167 + final int b1 = b[off];
1.168 + final int b2 = b[off+1];
1.169 + return (b1 & 0xff) | ((b2 & 0xff) << 8);
1.170 + }
1.171 +
1.172 + private static final long get32(final byte[] b, int off) throws IOException {
1.173 + final int s1 = get16(b, off);
1.174 + final int s2 = get16(b, off+2);
1.175 + return s1 | ((long)s2 << 16);
1.176 + }
1.177 +
1.178 +}