apt-pkg/pkgcachegen.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: pkgcachegen.h,v 1.19 2002/07/08 03:13:30 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    Each archive source has it's own list parser that is instantiated by
  10    the caller to provide data for the generator.
  11
  12    Parts of the cache are created by this generator class while other
  13    parts are created by the list parser. The list parser is responsible
  14    for creating version, depends and provides structures, and some of
  15    their contents
  16
  17    ##################################################################### */
  18                                                                         /*}}}*/
  19 #ifndef PKGLIB_PKGCACHEGEN_H
  20 #define PKGLIB_PKGCACHEGEN_H
  21
  22
  23 #include <apt-pkg/pkgcache.h>
  24 #include <apt-pkg/md5.h>
  25 #include <apt-pkg/macros.h>
  26
  27 #include <vector>
  28
  29 class pkgSourceList;
  30 class OpProgress;
  31 class MMap;
  32 class pkgIndexFile;
  33
  34 class pkgCacheGenerator                                                 /*{{{*/
  35 {
  36    private:
  37
  38    pkgCache::StringItem *UniqHash[26];
  39    map_ptrloc WriteStringInMap(std::string const &String) { return WriteStringInMap(String.c_str()); };
  40    map_ptrloc WriteStringInMap(const char *String);
  41    map_ptrloc WriteStringInMap(const char *String, const unsigned long &Len);
  42    map_ptrloc AllocateInMap(const unsigned long &size);
  43
  44    public:
  45
  46    class ListParser;
  47    friend class ListParser;
  48
  49    template<typename Iter> class Dynamic {
  50       public:
  51       static std::vector<Iter*> toReMap;
  52       Dynamic(Iter &I) {
  53          toReMap.push_back(&I);
  54       }
  55
  56       ~Dynamic() {
  57          toReMap.pop_back();
  58       }
  59    };
  60
  61    protected:
  62
  63    DynamicMMap &Map;
  64    pkgCache Cache;
  65    OpProgress *Progress;
  66
  67    std::string PkgFileName;
  68    pkgCache::PackageFile *CurrentFile;
  69
  70    // Flag file dependencies
  71    bool FoundFileDeps;
  72
  73    bool NewGroup(pkgCache::GrpIterator &Grp,const std::string &Name);
  74    bool NewPackage(pkgCache::PkgIterator &Pkg,const std::string &Name, const std::string &Arch);
  75    bool NewFileVer(pkgCache::VerIterator &Ver,ListParser &List);
  76    bool NewFileDesc(pkgCache::DescIterator &Desc,ListParser &List);
  77    bool NewDepends(pkgCache::PkgIterator &Pkg, pkgCache::VerIterator &Ver,
  78                    std::string const &Version, unsigned int const &Op,
  79                    unsigned int const &Type, map_ptrloc* &OldDepLast);
  80    bool NewDepends(pkgCache::PkgIterator &Pkg, pkgCache::VerIterator &Ver,
  81                    map_ptrloc const Version, unsigned int const &Op,
  82                    unsigned int const &Type, map_ptrloc* &OldDepLast);
  83    __deprecated unsigned long NewVersion(pkgCache::VerIterator &Ver,const std::string &VerStr,unsigned long Next)
  84    { return NewVersion(Ver, VerStr, 0, 0, Next); }
  85    unsigned long NewVersion(pkgCache::VerIterator &Ver,const std::string &VerStr,
  86                             map_ptrloc const ParentPkg, unsigned long const Hash,
  87                             unsigned long Next);
  88    map_ptrloc NewDescription(pkgCache::DescIterator &Desc,const std::string &Lang,const MD5SumValue &md5sum,map_ptrloc Next);
  89
  90    public:
  91
  92    unsigned long WriteUniqString(const char *S,unsigned int Size);
  93    inline unsigned long WriteUniqString(const std::string &S) {return WriteUniqString(S.c_str(),S.length());};
  94
  95    void DropProgress() {Progress = 0;};
  96    bool SelectFile(const std::string &File,const std::string &Site,pkgIndexFile const &Index,
  97                    unsigned long Flags = 0);
  98    bool MergeList(ListParser &List,pkgCache::VerIterator *Ver = 0);
  99    inline pkgCache &GetCache() {return Cache;};
 100    inline pkgCache::PkgFileIterator GetCurFile()
 101          {return pkgCache::PkgFileIterator(Cache,CurrentFile);};
 102
 103    bool HasFileDeps() {return FoundFileDeps;};
 104    bool MergeFileProvides(ListParser &List);
 105    __deprecated bool FinishCache(OpProgress *Progress);
 106
 107    static bool MakeStatusCache(pkgSourceList &List,OpProgress *Progress,
 108                         MMap **OutMap = 0,bool AllowMem = false);
 109    static bool MakeOnlyStatusCache(OpProgress *Progress,DynamicMMap **OutMap);
 110    static DynamicMMap* CreateDynamicMMap(FileFd *CacheF, unsigned long Flags = 0);
 111
 112    void ReMap(void const * const oldMap, void const * const newMap);
 113
 114    pkgCacheGenerator(DynamicMMap *Map,OpProgress *Progress);
 115    ~pkgCacheGenerator();
 116
 117    private:
 118    bool MergeListGroup(ListParser &List, std::string const &GrpName);
 119    bool MergeListPackage(ListParser &List, pkgCache::PkgIterator &Pkg);
 120    bool MergeListVersion(ListParser &List, pkgCache::PkgIterator &Pkg,
 121                          std::string const &Version, pkgCache::VerIterator* &OutVer);
 122
 123    bool AddImplicitDepends(pkgCache::GrpIterator &G, pkgCache::PkgIterator &P,
 124                            pkgCache::VerIterator &V);
 125    bool AddImplicitDepends(pkgCache::VerIterator &V, pkgCache::PkgIterator &D);
 126 };
 127                                                                         /*}}}*/
 128 // This is the abstract package list parser class.                      /*{{{*/
 129 class pkgCacheGenerator::ListParser
 130 {
 131    pkgCacheGenerator *Owner;
 132    friend class pkgCacheGenerator;
 133
 134    // Some cache items
 135    pkgCache::VerIterator OldDepVer;
 136    map_ptrloc *OldDepLast;
 137
 138    // Flag file dependencies
 139    bool FoundFileDeps;
 140
 141    protected:
 142
 143    inline unsigned long WriteUniqString(std::string S) {return Owner->WriteUniqString(S);};
 144    inline unsigned long WriteUniqString(const char *S,unsigned int Size) {return Owner->WriteUniqString(S,Size);};
 145    inline unsigned long WriteString(const std::string &S) {return Owner->WriteStringInMap(S);};
 146    inline unsigned long WriteString(const char *S,unsigned int Size) {return Owner->WriteStringInMap(S,Size);};
 147    bool NewDepends(pkgCache::VerIterator &Ver,const std::string &Package, const std::string &Arch,
 148                    const std::string &Version,unsigned int Op,
 149                    unsigned int Type);
 150    bool NewProvides(pkgCache::VerIterator &Ver,const std::string &PkgName,
 151                     const std::string &PkgArch, const std::string &Version);
 152
 153    public:
 154
 155    // These all operate against the current section
 156    virtual std::string Package() = 0;
 157    virtual std::string Architecture() = 0;
 158    virtual bool ArchitectureAll() = 0;
 159    virtual std::string Version() = 0;
 160    virtual bool NewVersion(pkgCache::VerIterator &Ver) = 0;
 161    virtual std::string Description() = 0;
 162    virtual std::string DescriptionLanguage() = 0;
 163    virtual MD5SumValue Description_md5() = 0;
 164    virtual unsigned short VersionHash() = 0;
 165    virtual bool UsePackage(pkgCache::PkgIterator &Pkg,
 166                            pkgCache::VerIterator &Ver) = 0;
 167    virtual unsigned long Offset() = 0;
 168    virtual unsigned long Size() = 0;
 169
 170    virtual bool Step() = 0;
 171
 172    inline bool HasFileDeps() {return FoundFileDeps;};
 173    virtual bool CollectFileProvides(pkgCache &/*Cache*/,
 174                                     pkgCache::VerIterator &/*Ver*/) {return true;};
 175
 176    ListParser() : FoundFileDeps(false) {};
 177    virtual ~ListParser() {};
 178 };
 179                                                                         /*}}}*/
 180
 181 bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
 182                         MMap **OutMap = 0,bool AllowMem = false);
 183 bool pkgMakeOnlyStatusCache(OpProgress &Progress,DynamicMMap **OutMap);
 184
 185 #endif