apt-pkg/pkgcachegen.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: pkgcachegen.h,v 1.2 1998/07/04 05:57:38 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,string VerStr,unsigned long Next);
  35
  36    unsigned long WriteUniqString(const char *S,unsigned int Size);
  37    inline unsigned long WriteUniqString(string S) {return WriteUniqString(S);};
  38
  39    public:
  40
  41    // This is the abstract package list parser class.
  42    class ListParser
  43    {
  44       pkgCacheGenerator *Owner;
  45       friend pkgCacheGenerator;
  46
  47       protected:
  48
  49       inline unsigned long WriteUniqString(string S) {return Owner->WriteUniqString(S);};
  50       inline unsigned long WriteUniqString(const char *S,unsigned int Size) {return Owner->WriteUniqString(S,Size);};
  51       inline unsigned long WriteString(string S) {return Owner->Map.WriteString(S);};
  52       inline unsigned long WriteString(const char *S,unsigned int Size) {return Owner->Map.WriteString(S,Size);};
  53
  54       public:
  55
  56       // These all operate against the current section
  57       virtual string Package() = 0;
  58       virtual string Version() = 0;
  59       virtual bool NewVersion(pkgCache::VerIterator Ver) = 0;
  60       virtual bool NewPackage(pkgCache::PkgIterator Pkg) = 0;
  61       virtual bool UsePackage(pkgCache::PkgIterator Pkg,
  62                               pkgCache::VerIterator Ver) = 0;
  63
  64       virtual bool Step() = 0;
  65       virtual ~ListParser() {};
  66    };
  67    friend ListParser;
  68
  69    bool SelectFile(string File,unsigned long Flags = 0);
  70    bool MergeList(ListParser &List);
  71
  72    pkgCacheGenerator(DynamicMMap &Map);
  73    ~pkgCacheGenerator();
  74 };
  75
  76 #endif