1 typedef struct ZipHead	ZipHead;
2 
3 enum
4 {
5 	/*
6 	 * magic numbers
7 	 */
8 	ZHeader		= 0x04034b50,
9 	ZCHeader	= 0x02014b50,
10 	ZECHeader	= 0x06054b50,
11 
12 	/*
13 	 * "general purpose flag" bits
14 	 */
15 	ZEncrypted	= 1 << 0,
16 	ZTrailInfo	= 1 << 3,	/* uncsize, csize, and crc are in trailer */
17 	ZCompPatch	= 1 << 5,	/* compression patched data */
18 
19 /*	ZCrcPoly	= 0xedb88320, */
20 #define	ZCrcPoly	0xedb88320
21 
22 	/*
23 	 * compression method
24 	 */
25 	ZDeflate	= 8,
26 
27 	/*
28 	 * internal file attributes
29 	 */
30 	ZIsText		= 1 << 0,
31 
32 	/*
33 	 * file attribute interpretation, from high byte of version
34 	 */
35 	ZDos		= 0,
36 	ZAmiga		= 1,
37 	ZVMS		= 2,
38 	ZUnix		= 3,
39 	ZVMCMS		= 4,
40 	ZAtariST	= 5,
41 	ZOS2HPFS	= 6,
42 	ZMac		= 7,
43 	ZZsys		= 8,
44 	ZCPM		= 9,
45 	ZNtfs		= 10,
46 
47 	/*
48 	 * external attribute flags for ZDos
49 	 */
50 	ZDROnly		= 0x01,
51 	ZDHidden	= 0x02,
52 	ZDSystem	= 0x04,
53 	ZDVLable	= 0x08,
54 	ZDDir		= 0x10,
55 	ZDArch		= 0x20,
56 
57 	ZHeadSize	= 4 + 2 + 2 + 2 + 2 + 2 + 4 + 4 + 4 + 2 + 2,
58 	ZHeadCrc	= 4 + 2 + 2 + 2 + 2 + 2,
59 	ZTrailSize	= 4 + 4 + 4,
60 	ZCHeadSize	= 4 + 2 + 2 + 2 + 2 + 2 + 2 + 4 + 4 + 4 + 2 + 2 + 2 + 2 + 2 + 4 + 4,
61 	ZECHeadSize	= 4 + 2 + 2 + 2 + 2 + 4 + 4 + 2
62 };
63 
64 /*
65  * interesting info from a zip header
66  */
67 struct ZipHead
68 {
69 	int	madeos;			/* version made by */
70 	int	madevers;
71 	int	extos;			/* version needed to extract */
72 	int	extvers;
73 	int	flags;			/* general purpose bit flag */
74 	int	meth;
75 	int	modtime;
76 	int	moddate;
77 	ulong	crc;
78 	ulong	csize;
79 	ulong	uncsize;
80 	int	iattr;
81 	ulong	eattr;
82 	ulong	off;
83 	char	*file;
84 };