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/macros.h>
  31
  32 #include <string>
  33
  34 #ifndef APT_8_CLEANER_HEADERS
  35 #include <apt-pkg/md5.h>
  36 #endif
  37 #ifndef APT_10_CLEANER_HEADERS
  38 #include <apt-pkg/pkgcache.h>
  39 #endif
  40
  41 class FileFd;
  42
  43 class debDebFile
  44 {
  45    protected:
  46
  47    FileFd &File;
  48    ARArchive AR;
  49
  50    bool CheckMember(const char *Name);
  51
  52    public:
  53    class ControlExtract;
  54    class MemControlExtract;
  55
  56    bool ExtractTarMember(pkgDirStream &Stream, const char *Name);
  57    bool ExtractArchive(pkgDirStream &Stream);
  58    const ARArchive::Member *GotoMember(const char *Name);
  59    inline FileFd &GetFile() {return File;};
  60
  61    debDebFile(FileFd &File);
  62 };
  63
  64 class debDebFile::ControlExtract : public pkgDirStream
  65 {
  66    public:
  67
  68    virtual bool DoItem(Item &Itm,int &Fd) APT_OVERRIDE;
  69 };
  70
  71 class debDebFile::MemControlExtract : public pkgDirStream
  72 {
  73    bool IsControl;
  74
  75    public:
  76
  77    char *Control;
  78    pkgTagSection Section;
  79    unsigned long Length;
  80    std::string Member;
  81
  82    // Members from DirStream
  83    virtual bool DoItem(Item &Itm,int &Fd) APT_OVERRIDE;
  84    virtual bool Process(Item &Itm,const unsigned char *Data,
  85                         unsigned long long Size,unsigned long long Pos) APT_OVERRIDE;
  86
  87    // Helpers
  88    bool Read(debDebFile &Deb);
  89    bool TakeControl(const void *Data,unsigned long long Size);
  90
  91    MemControlExtract() : IsControl(false), Control(0), Length(0), Member("control") {};
  92    MemControlExtract(std::string Member) : IsControl(false), Control(0), Length(0), Member(Member) {};
  93    ~MemControlExtract() {delete [] Control;};
  94 };
  95                                                                         /*}}}*/
  96
  97 #endif