apt-inst/dirstream.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: dirstream.h,v 1.2 2001/02/20 07:03:16 jgg Exp $
   4 /* ######################################################################
   5
   6    Directory Stream
   7
   8    When unpacking the contents of the archive are passed into a directory
   9    stream class for analysis and processing. The class controls all aspects
  10    of actually writing the directory stream from disk. The low level
  11    archive handlers are only responsible for decoding the archive format
  12    and sending events (via method calls) to the specified directory
  13    stream.
  14
  15    When unpacking a real file the archive handler is passed back a file
  16    handle to write the data to, this is to support strange
  17    archives+unpacking methods. If that fd is -1 then the file data is
  18    simply ignored.
  19
  20    The provided defaults do the 'Right Thing' for a normal unpacking
  21    process (ie 'tar')
  22
  23    ##################################################################### */
  24                                                                         /*}}}*/
  25 #ifndef PKGLIB_DIRSTREAM_H
  26 #define PKGLIB_DIRSTREAM_H
  27
  28
  29 class pkgDirStream
  30 {
  31    public:
  32
  33    // All possible information about a component
  34    struct Item
  35    {
  36       enum Type_t {File, HardLink, SymbolicLink, CharDevice, BlockDevice,
  37                    Directory, FIFO} Type;
  38       char *Name;
  39       char *LinkTarget;
  40       unsigned long Mode;
  41       unsigned long UID;
  42       unsigned long GID;
  43       unsigned long Size;
  44       unsigned long MTime;
  45       unsigned long Major;
  46       unsigned long Minor;
  47    };
  48
  49    virtual bool DoItem(Item &Itm,int &Fd);
  50    virtual bool Fail(Item &Itm,int Fd);
  51    virtual bool FinishedFile(Item &Itm,int Fd);
  52    virtual bool Process(Item &/*Itm*/,const unsigned char * /*Data*/,
  53                         unsigned long /*Size*/,unsigned long /*Pos*/) {return true;};
  54
  55    virtual ~pkgDirStream() {};
  56 };
  57
  58 #endif