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/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 #if APT_PKG_ABI >= 413
  66    unsigned long long Start;
  67 #else
  68    unsigned long Start;
  69 #endif
  70    Member *Next;
  71
  72    Member() : Start(0), Next(0) {};
  73 };
  74
  75 #endif