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