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Java > Open Source Codes > java > util > zip > ZipConstants


1 /*
2  * @(#)ZipConstants.java 1.18 03/12/19
3  *
4  * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5  * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6  */
7
8 package java.util.zip;
9
10 /*
11  * This interface defines the constants that are used by the classes
12  * which manipulate ZIP files.
13  *
14  * @version 1.18, 12/19/03
15  * @author David Connelly
16  */
17 interface ZipConstants {
18     /*
19      * Header signatures
20      */
21     static long LOCSIG = 0x04034b50L; // "PK\003\004"
22 static long EXTSIG = 0x08074b50L; // "PK\007\008"
23 static long CENSIG = 0x02014b50L; // "PK\001\002"
24 static long ENDSIG = 0x06054b50L; // "PK\005\006"
25
26     /*
27      * Header sizes in bytes (including signatures)
28      */
29     static final int LOCHDR = 30; // LOC header size
30 static final int EXTHDR = 16; // EXT header size
31 static final int CENHDR = 46; // CEN header size
32 static final int ENDHDR = 22; // END header size
33
34     /*
35      * Local file (LOC) header field offsets
36      */
37     static final int LOCVER = 4; // version needed to extract
38 static final int LOCFLG = 6; // general purpose bit flag
39 static final int LOCHOW = 8; // compression method
40 static final int LOCTIM = 10; // modification time
41 static final int LOCCRC = 14; // uncompressed file crc-32 value
42 static final int LOCSIZ = 18; // compressed size
43 static final int LOCLEN = 22; // uncompressed size
44 static final int LOCNAM = 26; // filename length
45 static final int LOCEXT = 28; // extra field length
46
47     /*
48      * Extra local (EXT) header field offsets
49      */
50     static final int EXTCRC = 4; // uncompressed file crc-32 value
51 static final int EXTSIZ = 8; // compressed size
52 static final int EXTLEN = 12; // uncompressed size
53
54     /*
55      * Central directory (CEN) header field offsets
56      */
57     static final int CENVEM = 4; // version made by
58 static final int CENVER = 6; // version needed to extract
59 static final int CENFLG = 8; // encrypt, decrypt flags
60 static final int CENHOW = 10; // compression method
61 static final int CENTIM = 12; // modification time
62 static final int CENCRC = 16; // uncompressed file crc-32 value
63 static final int CENSIZ = 20; // compressed size
64 static final int CENLEN = 24; // uncompressed size
65 static final int CENNAM = 28; // filename length
66 static final int CENEXT = 30; // extra field length
67 static final int CENCOM = 32; // comment length
68 static final int CENDSK = 34; // disk number start
69 static final int CENATT = 36; // internal file attributes
70 static final int CENATX = 38; // external file attributes
71 static final int CENOFF = 42; // LOC header offset
72
73     /*
74      * End of central directory (END) header field offsets
75      */
76     static final int ENDSUB = 8; // number of entries on this disk
77 static final int ENDTOT = 10; // total number of entries
78 static final int ENDSIZ = 12; // central directory size in bytes
79 static final int ENDOFF = 16; // offset of first CEN header
80 static final int ENDCOM = 20; // zip file comment length
81 }
82
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