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1 // -*- mode: cpp; mode: fold -*-
2 // Description /*{{{*/
3 // $Id: arfile.h,v 1.2 2001/02/20 07:03:16 jgg Exp $
4 /* ######################################################################
5
6 AR File - Handle an 'AR' archive
7
8 This is a reader for the usual 4.4 BSD AR format. It allows raw
9 stream access to a single member at a time. Basically all this class
10 provides is header parsing and verification. It is up to the client
11 to correctly make use of the stream start/stop points.
12
13 ##################################################################### */
14 /*}}}*/
15 #ifndef PKGLIB_ARFILE_H
16 #define PKGLIB_ARFILE_H
17
18
19 #include <string>
20 #include <apt-pkg/macros.h>
21 #ifndef APT_8_CLEANER_HEADERS
22 #include <apt-pkg/fileutl.h>
23 #endif
24
25 class FileFd;
26
27 class ARArchive
28 {
29 struct MemberHeader;
30 public:
31 struct Member;
32
33 protected:
34
35 // Linked list of members
36 Member *List;
37
38 bool LoadHeaders();
39
40 public:
41
42 // The stream file
43 FileFd &File;
44
45 // Locate a member by name
46 const Member *FindMember(const char *Name) const;
47 inline Member *Members() { return List; }
48
49 ARArchive(FileFd &File);
50 ~ARArchive();
51 };
52
53 // A member of the archive
54 struct ARArchive::Member
55 {
56 // Fields from the header
57 std::string Name;
58 unsigned long MTime;
59 unsigned long UID;
60 unsigned long GID;
61 unsigned long Mode;
62 unsigned long long Size;
63
64 // Location of the data.
65 unsigned long long Start;
66 Member *Next;
67
68 Member() : Start(0), Next(0) {};
69 };
70
71 #endif