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