apt-inst/contrib/arfile.h

   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/fileutl.h>
  21
  22 class ARArchive
  23 {
  24    struct MemberHeader;
  25    public:
  26    struct Member;
  27
  28    protected:
  29
  30    // Linked list of members
  31    Member *List;
  32
  33    bool LoadHeaders();
  34
  35    public:
  36
  37    // The stream file
  38    FileFd &File;
  39
  40    // Locate a member by name
  41    const Member *FindMember(const char *Name) const;
  42    inline Member *Members() { return List; }
  43
  44    ARArchive(FileFd &File);
  45    ~ARArchive();
  46 };
  47
  48 // A member of the archive
  49 struct ARArchive::Member
  50 {
  51    // Fields from the header
  52    string Name;
  53    unsigned long MTime;
  54    unsigned long UID;
  55    unsigned long GID;
  56    unsigned long Mode;
  57    unsigned long Size;
  58
  59    // Location of the data.
  60    unsigned long Start;
  61    Member *Next;
  62
  63    Member() : Start(0), Next(0) {};
  64 };
  65
  66 #endif