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 #ifndef APT_8_CLEANER_HEADERS
  21 #include <apt-pkg/fileutl.h>
  22 #endif
  23
  24 class FileFd;
  25
  26 class ARArchive
  27 {
  28    struct MemberHeader;
  29    public:
  30    struct Member;
  31
  32    protected:
  33
  34    // Linked list of members
  35    Member *List;
  36
  37    bool LoadHeaders();
  38
  39    public:
  40
  41    // The stream file
  42    FileFd &File;
  43
  44    // Locate a member by name
  45    const Member *FindMember(const char *Name) const;
  46    inline Member *Members() { return List; }
  47
  48    ARArchive(FileFd &File);
  49    ~ARArchive();
  50 };
  51
  52 // A member of the archive
  53 struct ARArchive::Member
  54 {
  55    // Fields from the header
  56    std::string Name;
  57    unsigned long MTime;
  58    unsigned long UID;
  59    unsigned long GID;
  60    unsigned long Mode;
  61    unsigned long long Size;
  62
  63    // Location of the data.
  64    unsigned long Start;
  65    Member *Next;
  66
  67    Member() : Start(0), Next(0) {};
  68 };
  69
  70 #endif