ZipConstants.java revision 51b1b6997fd3f980076b8081f7f1165ccc2a4008 
1/*
2 * Copyright (c) 1995, 1996, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
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
26package java.util.zip;
27
28/*
29 * This interface defines the constants that are used by the classes
30 * which manipulate ZIP files.
31 *
32 * @author      David Connelly
33 */
34interface ZipConstants {
35    /*
36     * Header signatures
37     */
38    static long LOCSIG = 0x04034b50L;   // "PK\003\004"
39    static long EXTSIG = 0x08074b50L;   // "PK\007\008"
40    static long CENSIG = 0x02014b50L;   // "PK\001\002"
41    static long ENDSIG = 0x06054b50L;   // "PK\005\006"
42
43    /*
44     * Header sizes in bytes (including signatures)
45     */
46    static final int LOCHDR = 30;       // LOC header size
47    static final int EXTHDR = 16;       // EXT header size
48    static final int CENHDR = 46;       // CEN header size
49    static final int ENDHDR = 22;       // END header size
50
51    /*
52     * Local file (LOC) header field offsets
53     */
54    static final int LOCVER = 4;        // version needed to extract
55    static final int LOCFLG = 6;        // general purpose bit flag
56    static final int LOCHOW = 8;        // compression method
57    static final int LOCTIM = 10;       // modification time
58    static final int LOCCRC = 14;       // uncompressed file crc-32 value
59    static final int LOCSIZ = 18;       // compressed size
60    static final int LOCLEN = 22;       // uncompressed size
61    static final int LOCNAM = 26;       // filename length
62    static final int LOCEXT = 28;       // extra field length
63
64    /*
65     * Extra local (EXT) header field offsets
66     */
67    static final int EXTCRC = 4;        // uncompressed file crc-32 value
68    static final int EXTSIZ = 8;        // compressed size
69    static final int EXTLEN = 12;       // uncompressed size
70
71    /*
72     * Central directory (CEN) header field offsets
73     */
74    static final int CENVEM = 4;        // version made by
75    static final int CENVER = 6;        // version needed to extract
76    static final int CENFLG = 8;        // encrypt, decrypt flags
77    static final int CENHOW = 10;       // compression method
78    static final int CENTIM = 12;       // modification time
79    static final int CENCRC = 16;       // uncompressed file crc-32 value
80    static final int CENSIZ = 20;       // compressed size
81    static final int CENLEN = 24;       // uncompressed size
82    static final int CENNAM = 28;       // filename length
83    static final int CENEXT = 30;       // extra field length
84    static final int CENCOM = 32;       // comment length
85    static final int CENDSK = 34;       // disk number start
86    static final int CENATT = 36;       // internal file attributes
87    static final int CENATX = 38;       // external file attributes
88    static final int CENOFF = 42;       // LOC header offset
89
90    /*
91     * End of central directory (END) header field offsets
92     */
93    static final int ENDSUB = 8;        // number of entries on this disk
94    static final int ENDTOT = 10;       // total number of entries
95    static final int ENDSIZ = 12;       // central directory size in bytes
96    static final int ENDOFF = 16;       // offset of first CEN header
97    static final int ENDCOM = 20;       // zip file comment length
98}
99