apt-pkg/pkgcachegen.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: pkgcachegen.h,v 1.5 1998/07/12 23:58:35 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 #ifdef __GNUG__
  17 #pragma interface "apt-pkg/pkgcachegen.h"
  18 #endif
  19
  20 #include <apt-pkg/pkgcache.h>
  21
  22 class pkgCacheGenerator
  23 {
  24    public:
  25
  26    class ListParser;
  27
  28    protected:
  29
  30    DynamicMMap &Map;
  31    pkgCache Cache;
  32
  33    string PkgFileName;
  34    pkgCache::PackageFile *CurrentFile;
  35
  36    bool NewPackage(pkgCache::PkgIterator &Pkg,string Pkg);
  37    bool NewFileVer(pkgCache::VerIterator &Ver,ListParser &List);
  38    unsigned long NewVersion(pkgCache::VerIterator &Ver,string VerStr,unsigned long Next);
  39
  40    unsigned long WriteUniqString(const char *S,unsigned int Size);
  41    inline unsigned long WriteUniqString(string S) {return WriteUniqString(S);};
  42
  43    public:
  44
  45    // This is the abstract package list parser class.
  46    class ListParser
  47    {
  48       pkgCacheGenerator *Owner;
  49       friend pkgCacheGenerator;
  50
  51       protected:
  52
  53       inline unsigned long WriteUniqString(string S) {return Owner->WriteUniqString(S);};
  54       inline unsigned long WriteUniqString(const char *S,unsigned int Size) {return Owner->WriteUniqString(S,Size);};
  55       inline unsigned long WriteString(string S) {return Owner->Map.WriteString(S);};
  56       inline unsigned long WriteString(const char *S,unsigned int Size) {return Owner->Map.WriteString(S,Size);};
  57       bool NewDepends(pkgCache::VerIterator Ver,string Package,
  58                          string Version,unsigned int Op,
  59                          unsigned int Type);
  60       bool NewProvides(pkgCache::VerIterator Ver,string Package,string Version);
  61
  62       public:
  63
  64       // These all operate against the current section
  65       virtual string Package() = 0;
  66       virtual string Version() = 0;
  67       virtual bool NewVersion(pkgCache::VerIterator Ver) = 0;
  68       virtual bool UsePackage(pkgCache::PkgIterator Pkg,
  69                               pkgCache::VerIterator Ver) = 0;
  70       virtual unsigned long Offset() = 0;
  71       virtual unsigned long Size() = 0;
  72
  73       virtual bool Step() = 0;
  74
  75       virtual ~ListParser() {};
  76    };
  77    friend ListParser;
  78
  79    bool SelectFile(string File,unsigned long Flags = 0);
  80    bool MergeList(ListParser &List);
  81
  82    pkgCacheGenerator(DynamicMMap &Map);
  83    ~pkgCacheGenerator();
  84 };
  85
  86 #endif