apt-pkg/pkgcachegen.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: pkgcachegen.h,v 1.1 1998/07/02 02:58:13 jgg Exp $
   4 /* ######################################################################
   5
   6    Package Cache Generator - Generator for the cache structure.
   7
   8    This builds the cache structure from the abstract package list parser.
   9
  10    ##################################################################### */
  11                                                                         /*}}}*/
  12 // Header section: pkglib
  13 #ifndef PKGLIB_PKGCACHEGEN_H
  14 #define PKGLIB_PKGCACHEGEN_H
  15
  16 #include <pkglib/pkgcache.h>
  17
  18 class pkgCacheGenerator
  19 {
  20    public:
  21
  22    class ListParser;
  23
  24    protected:
  25
  26    DynamicMMap &Map;
  27    pkgCache Cache;
  28
  29    string PkgFileName;
  30    pkgCache::PackageFile *CurrentFile;
  31
  32    bool NewPackage(pkgCache::PkgIterator Pkg,string Pkg);
  33    bool NewFileVer(pkgCache::VerIterator Ver,ListParser &List);
  34    unsigned long NewVersion(pkgCache::VerIterator &Ver,unsigned long Next);
  35
  36    public:
  37
  38    // This is the abstract package list parser class.
  39    class ListParser
  40    {
  41       pkgCacheGenerator *Owner;
  42       friend pkgCacheGenerator;
  43
  44       protected:
  45
  46       inline unsigned long WriteString(string S) {return Owner->Map.WriteString(S);};
  47       inline unsigned long WriteString(const char *S,unsigned int Size) {return Owner->Map.WriteString(S,Size);};
  48
  49       public:
  50
  51       // These all operate against the current section
  52       virtual string Package() = 0;
  53       virtual string Version() = 0;
  54       virtual bool NewVersion(pkgCache::VerIterator Ver) = 0;
  55       virtual bool NewPackage(pkgCache::PkgIterator Pkg) = 0;
  56       virtual bool UsePackage(pkgCache::PkgIterator Pkg) = 0;
  57
  58       virtual bool Step() = 0;
  59    };
  60    friend ListParser;
  61
  62    bool SelectFile(string File,unsigned long Flags = 0);
  63    bool MergeList(ListParser &List);
  64
  65    pkgCacheGenerator(DynamicMMap &Map);
  66    ~pkgCacheGenerator();
  67 };
  68
  69 #endif