apt-inst/deb/debfile.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: debfile.h,v 1.2 2001/02/20 07:03:17 jgg Exp $
   4 /* ######################################################################
   5
   6    Debian Archive File (.deb)
   7
   8    This Class handles all the operations performed directly on .deb
   9    files. It makes use of the AR and TAR classes to give the necessary
  10    external interface.
  11
  12    There are only two things that can be done with a raw package,
  13    extract it's control information and extract the contents itself.
  14
  15    This should probably subclass an as-yet unwritten super class to
  16    produce a generic archive mechanism.
  17
  18    The memory control file extractor is useful to extract a single file
  19    into memory from the control.tar.gz
  20
  21    ##################################################################### */
  22                                                                         /*}}}*/
  23 #ifndef PKGLIB_DEBFILE_H
  24 #define PKGLIB_DEBFILE_H
  25
  26
  27 #include <apt-pkg/arfile.h>
  28 #include <apt-pkg/dirstream.h>
  29 #include <apt-pkg/tagfile.h>
  30 #include <apt-pkg/pkgcache.h>
  31
  32 #ifndef APT_8_CLEANER_HEADERS
  33 #include <apt-pkg/md5.h>
  34 #endif
  35
  36 class FileFd;
  37
  38 class debDebFile
  39 {
  40    protected:
  41
  42    FileFd &File;
  43    ARArchive AR;
  44
  45    bool CheckMember(const char *Name);
  46
  47    public:
  48    class ControlExtract;
  49    class MemControlExtract;
  50
  51    bool ExtractTarMember(pkgDirStream &Stream, const char *Name);
  52    bool ExtractArchive(pkgDirStream &Stream);
  53    const ARArchive::Member *GotoMember(const char *Name);
  54    inline FileFd &GetFile() {return File;};
  55
  56    debDebFile(FileFd &File);
  57 };
  58
  59 class debDebFile::ControlExtract : public pkgDirStream
  60 {
  61    public:
  62
  63    virtual bool DoItem(Item &Itm,int &Fd);
  64 };
  65
  66 class debDebFile::MemControlExtract : public pkgDirStream
  67 {
  68    bool IsControl;
  69
  70    public:
  71
  72    char *Control;
  73    pkgTagSection Section;
  74    unsigned long Length;
  75    std::string Member;
  76
  77    // Members from DirStream
  78    virtual bool DoItem(Item &Itm,int &Fd);
  79    virtual bool Process(Item &Itm,const unsigned char *Data,
  80                         unsigned long Size,unsigned long Pos);
  81
  82
  83    // Helpers
  84    bool Read(debDebFile &Deb);
  85    bool TakeControl(const void *Data,unsigned long Size);
  86
  87    MemControlExtract() : IsControl(false), Control(0), Length(0), Member("control") {};
  88    MemControlExtract(std::string Member) : IsControl(false), Control(0), Length(0), Member(Member) {};
  89    ~MemControlExtract() {delete [] Control;};
  90 };
  91                                                                         /*}}}*/
  92
  93 #endif