apt-pkg/pkgrecords.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: pkgrecords.h,v 1.6 2001/03/13 06:51:46 jgg Exp $
   4 /* ######################################################################
   5
   6    Package Records - Allows access to complete package description records
   7                      directly from the file.
   8
   9    The package record system abstracts the actual parsing of the
  10    package files. This is different than the generators parser in that
  11    it is used to access information not generate information. No
  12    information touched by the generator should be parable from here as
  13    it can always be retreived directly from the cache.
  14
  15    ##################################################################### */
  16                                                                         /*}}}*/
  17 #ifndef PKGLIB_PKGRECORDS_H
  18 #define PKGLIB_PKGRECORDS_H
  19
  20
  21 #include <apt-pkg/pkgcache.h>
  22 #include <apt-pkg/fileutl.h>
  23
  24 class pkgRecords
  25 {
  26    public:
  27    class Parser;
  28
  29    private:
  30
  31    pkgCache &Cache;
  32    Parser **Files;
  33
  34    public:
  35
  36    // Lookup function
  37    Parser &Lookup(pkgCache::VerFileIterator const &Ver);
  38    Parser &Lookup(pkgCache::DescFileIterator const &Desc);
  39
  40    // Construct destruct
  41    pkgRecords(pkgCache &Cache);
  42    ~pkgRecords();
  43 };
  44
  45 class pkgRecords::Parser
  46 {
  47    protected:
  48
  49    virtual bool Jump(pkgCache::VerFileIterator const &Ver) = 0;
  50    virtual bool Jump(pkgCache::DescFileIterator const &Desc) = 0;
  51
  52    public:
  53    friend class pkgRecords;
  54
  55    // These refer to the archive file for the Version
  56    virtual string FileName() {return string();};
  57    virtual string MD5Hash() {return string();};
  58    virtual string SHA1Hash() {return string();};
  59    virtual string SourcePkg() {return string();};
  60    virtual string SourceVer() {return string();};
  61
  62    // These are some general stats about the package
  63    virtual string Maintainer() {return string();};
  64    virtual string ShortDesc() {return string();};
  65    virtual string LongDesc() {return string();};
  66    virtual string Name() {return string();};
  67
  68    // The record in binary form
  69    virtual void GetRec(const char *&Start,const char *&Stop) {Start = Stop = 0;};
  70
  71    virtual ~Parser() {};
  72 };
  73
  74 #endif