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