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