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