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 class FileFd;
  33
  34 class debDebFile
  35 {
  36    protected:
  37
  38    FileFd &File;
  39    ARArchive AR;
  40
  41    bool CheckMember(const char *Name);
  42
  43    public:
  44    class ControlExtract;
  45    class MemControlExtract;
  46
  47    bool ExtractArchive(pkgDirStream &Stream);
  48    const ARArchive::Member *GotoMember(const char *Name);
  49    inline FileFd &GetFile() {return File;};
  50
  51    debDebFile(FileFd &File);
  52 };
  53
  54 class debDebFile::ControlExtract : public pkgDirStream
  55 {
  56    public:
  57
  58    virtual bool DoItem(Item &Itm,int &Fd);
  59 };
  60
  61 class debDebFile::MemControlExtract : public pkgDirStream
  62 {
  63    bool IsControl;
  64
  65    public:
  66
  67    char *Control;
  68    pkgTagSection Section;
  69    unsigned long Length;
  70    std::string Member;
  71
  72    // Members from DirStream
  73    virtual bool DoItem(Item &Itm,int &Fd);
  74    virtual bool Process(Item &Itm,const unsigned char *Data,
  75                         unsigned long Size,unsigned long Pos);
  76
  77
  78    // Helpers
  79    bool Read(debDebFile &Deb);
  80    bool TakeControl(const void *Data,unsigned long Size);
  81
  82    MemControlExtract() : IsControl(false), Control(0), Length(0), Member("control") {};
  83    MemControlExtract(std::string Member) : IsControl(false), Control(0), Length(0), Member(Member) {};
  84    ~MemControlExtract() {delete [] Control;};
  85 };
  86                                                                         /*}}}*/
  87
  88 #endif