apt-pkg/indexfile.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: indexfile.h,v 1.6.2.1 2003/12/24 23:09:17 mdz Exp $
   4 /* ######################################################################
   5
   6    Index File - Abstraction for an index of archive/source file.
   7
   8    There are 4 primary sorts of index files, all represented by this
   9    class:
  10
  11    Binary index files
  12    Binary translation files
  13    Bianry index files decribing the local system
  14    Source index files
  15
  16    They are all bundled together here, and the interfaces for
  17    sources.list, acquire, cache gen and record parsing all use this class
  18    to acess the underlying representation.
  19
  20    ##################################################################### */
  21                                                                         /*}}}*/
  22 #ifndef PKGLIB_INDEXFILE_H
  23 #define PKGLIB_INDEXFILE_H
  24
  25
  26 #include <string>
  27 #include <apt-pkg/pkgcache.h>
  28 #include <apt-pkg/srcrecords.h>
  29 #include <apt-pkg/pkgrecords.h>
  30
  31 using std::string;
  32
  33 class pkgAcquire;
  34 class pkgCacheGenerator;
  35 class OpProgress;
  36 class pkgIndexFile
  37 {
  38    protected:
  39    bool Trusted;
  40
  41    public:
  42
  43    class Type
  44    {
  45       public:
  46
  47       // Global list of Items supported
  48       static Type **GlobalList;
  49       static unsigned long GlobalListLen;
  50       static Type *GetType(const char *Type);
  51
  52       const char *Label;
  53
  54       virtual pkgRecords::Parser *CreatePkgParser(pkgCache::PkgFileIterator /*File*/) const {return 0;};
  55       Type();
  56       virtual ~Type() {};
  57    };
  58
  59    virtual const Type *GetType() const = 0;
  60
  61    // Return descriptive strings of various sorts
  62    virtual string ArchiveInfo(pkgCache::VerIterator Ver) const;
  63    virtual string SourceInfo(pkgSrcRecords::Parser const &Record,
  64                              pkgSrcRecords::File const &File) const;
  65    virtual string Describe(bool Short = false) const = 0;
  66
  67    // Interface for acquire
  68    virtual string ArchiveURI(string /*File*/) const {return string();};
  69
  70    // Interface for the record parsers
  71    virtual pkgSrcRecords::Parser *CreateSrcParser() const {return 0;};
  72
  73    // Interface for the Cache Generator
  74    virtual bool Exists() const = 0;
  75    virtual bool HasPackages() const = 0;
  76    virtual unsigned long Size() const = 0;
  77    virtual bool Merge(pkgCacheGenerator &/*Gen*/,OpProgress &/*Prog*/) const {return false;};
  78    virtual bool MergeFileProvides(pkgCacheGenerator &/*Gen*/,OpProgress &/*Prog*/) const {return true;};
  79    virtual pkgCache::PkgFileIterator FindInCache(pkgCache &Cache) const;
  80
  81    static bool TranslationsAvailable();
  82    static bool CheckLanguageCode(const char *Lang);
  83    static string LanguageCode();
  84
  85    bool IsTrusted() const { return Trusted; };
  86
  87    pkgIndexFile(bool Trusted): Trusted(Trusted) {};
  88    virtual ~pkgIndexFile() {};
  89 };
  90
  91 #endif