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 #include <apt-pkg/md5.h>
  23 #include <apt-pkg/mmap.h>
  24 #include <apt-pkg/pkgcache.h>
  25 #include <apt-pkg/cacheiterators.h>
  26 #include <apt-pkg/macros.h>
  27
  28 #include <vector>
  29 #include <string>
  30 #include <map>
  31
  32 class FileFd;
  33 class pkgSourceList;
  34 class OpProgress;
  35 class pkgIndexFile;
  36
  37 class APT_HIDDEN pkgCacheGenerator                                      /*{{{*/
  38 {
  39    private:
  40    APT_HIDDEN map_stringitem_t WriteStringInMap(std::string const &String) { return WriteStringInMap(String.c_str()); };
  41    APT_HIDDEN map_stringitem_t WriteStringInMap(const char *String);
  42    APT_HIDDEN map_stringitem_t WriteStringInMap(const char *String, const unsigned long &Len);
  43    APT_HIDDEN map_pointer_t AllocateInMap(const unsigned long &size);
  44
  45    std::map<std::string,map_stringitem_t> strMixed;
  46    std::map<std::string,map_stringitem_t> strSections;
  47    std::map<std::string,map_stringitem_t> strPkgNames;
  48    std::map<std::string,map_stringitem_t> strVersions;
  49
  50    public:
  51
  52    class ListParser;
  53    friend class ListParser;
  54
  55    template<typename Iter> class Dynamic {
  56       public:
  57       static std::vector<Iter*> toReMap;
  58       Dynamic(Iter &I) {
  59          toReMap.push_back(&I);
  60       }
  61
  62       ~Dynamic() {
  63          toReMap.pop_back();
  64       }
  65    };
  66
  67    protected:
  68
  69    DynamicMMap &Map;
  70    pkgCache Cache;
  71    OpProgress *Progress;
  72
  73    std::string PkgFileName;
  74    pkgCache::PackageFile *CurrentFile;
  75
  76    // Flag file dependencies
  77    bool FoundFileDeps;
  78
  79    bool NewGroup(pkgCache::GrpIterator &Grp,const std::string &Name);
  80    bool NewPackage(pkgCache::PkgIterator &Pkg,const std::string &Name, const std::string &Arch);
  81    bool NewFileVer(pkgCache::VerIterator &Ver,ListParser &List);
  82    bool NewFileDesc(pkgCache::DescIterator &Desc,ListParser &List);
  83    bool NewDepends(pkgCache::PkgIterator &Pkg, pkgCache::VerIterator &Ver,
  84                    std::string const &Version, unsigned int const &Op,
  85                    unsigned int const &Type, map_pointer_t* &OldDepLast);
  86    bool NewDepends(pkgCache::PkgIterator &Pkg, pkgCache::VerIterator &Ver,
  87                    map_pointer_t const Version, unsigned int const &Op,
  88                    unsigned int const &Type, map_pointer_t* &OldDepLast);
  89    map_pointer_t NewVersion(pkgCache::VerIterator &Ver,const std::string &VerStr,map_pointer_t const Next) APT_DEPRECATED
  90    { return NewVersion(Ver, VerStr, 0, 0, Next); }
  91    map_pointer_t NewVersion(pkgCache::VerIterator &Ver,const std::string &VerStr,
  92                             map_pointer_t const ParentPkg, unsigned short const Hash,
  93                             map_pointer_t const Next);
  94    map_pointer_t NewDescription(pkgCache::DescIterator &Desc,const std::string &Lang,const MD5SumValue &md5sum,map_stringitem_t const idxmd5str);
  95
  96    public:
  97
  98    enum StringType { MIXED, PKGNAME, VERSIONNUMBER, SECTION };
  99    map_stringitem_t StoreString(StringType const type, const char * S, unsigned int const Size);
 100    inline map_stringitem_t StoreString(enum StringType const type, const std::string &S) {return StoreString(type, S.c_str(),S.length());};
 101
 102    void DropProgress() {Progress = 0;};
 103    bool SelectFile(const std::string &File,const std::string &Site,pkgIndexFile const &Index,
 104                    unsigned long Flags = 0);
 105    bool MergeList(ListParser &List,pkgCache::VerIterator *Ver = 0);
 106    inline pkgCache &GetCache() {return Cache;};
 107    inline pkgCache::PkgFileIterator GetCurFile()
 108          {return pkgCache::PkgFileIterator(Cache,CurrentFile);};
 109
 110    bool HasFileDeps() {return FoundFileDeps;};
 111    bool MergeFileProvides(ListParser &List);
 112    bool FinishCache(OpProgress *Progress) APT_DEPRECATED APT_CONST;
 113
 114    APT_PUBLIC static bool MakeStatusCache(pkgSourceList &List,OpProgress *Progress,
 115                         MMap **OutMap = 0,bool AllowMem = false);
 116    APT_PUBLIC static bool MakeOnlyStatusCache(OpProgress *Progress,DynamicMMap **OutMap);
 117    APT_PUBLIC static DynamicMMap* CreateDynamicMMap(FileFd *CacheF, unsigned long Flags = 0);
 118
 119    void ReMap(void const * const oldMap, void const * const newMap);
 120
 121    pkgCacheGenerator(DynamicMMap *Map,OpProgress *Progress);
 122    ~pkgCacheGenerator();
 123
 124    private:
 125    APT_HIDDEN bool MergeListGroup(ListParser &List, std::string const &GrpName);
 126    APT_HIDDEN bool MergeListPackage(ListParser &List, pkgCache::PkgIterator &Pkg);
 127    APT_HIDDEN bool MergeListVersion(ListParser &List, pkgCache::PkgIterator &Pkg,
 128                          std::string const &Version, pkgCache::VerIterator* &OutVer);
 129
 130    APT_HIDDEN bool AddImplicitDepends(pkgCache::GrpIterator &G, pkgCache::PkgIterator &P,
 131                            pkgCache::VerIterator &V);
 132    APT_HIDDEN bool AddImplicitDepends(pkgCache::VerIterator &V, pkgCache::PkgIterator &D);
 133
 134    APT_HIDDEN bool AddNewDescription(ListParser &List, pkgCache::VerIterator &Ver,
 135          std::string const &lang, MD5SumValue const &CurMd5, map_stringitem_t &md5idx);
 136 };
 137                                                                         /*}}}*/
 138 // This is the abstract package list parser class.                      /*{{{*/
 139 class APT_HIDDEN pkgCacheGenerator::ListParser
 140 {
 141    pkgCacheGenerator *Owner;
 142    friend class pkgCacheGenerator;
 143
 144    // Some cache items
 145    pkgCache::VerIterator OldDepVer;
 146    map_pointer_t *OldDepLast;
 147
 148    // Flag file dependencies
 149    bool FoundFileDeps;
 150
 151    protected:
 152
 153    inline map_stringitem_t StoreString(pkgCacheGenerator::StringType const type, std::string const &S) {return Owner->StoreString(type, S);};
 154    inline map_stringitem_t StoreString(pkgCacheGenerator::StringType const type, const char *S,unsigned int Size) {return Owner->StoreString(type, S, Size);};
 155
 156    inline map_stringitem_t WriteString(const std::string &S) {return Owner->WriteStringInMap(S);};
 157    inline map_stringitem_t WriteString(const char *S,unsigned int Size) {return Owner->WriteStringInMap(S,Size);};
 158    bool NewDepends(pkgCache::VerIterator &Ver,const std::string &Package, const std::string &Arch,
 159                    const std::string &Version,unsigned int Op,
 160                    unsigned int Type);
 161    bool NewProvides(pkgCache::VerIterator &Ver,const std::string &PkgName,
 162                     const std::string &PkgArch, const std::string &Version);
 163
 164    public:
 165
 166    // These all operate against the current section
 167    virtual std::string Package() = 0;
 168    virtual std::string Architecture() = 0;
 169    virtual bool ArchitectureAll() = 0;
 170    virtual std::string Version() = 0;
 171    virtual bool NewVersion(pkgCache::VerIterator &Ver) = 0;
 172    virtual std::string Description(std::string const &lang) = 0;
 173    virtual std::vector<std::string> AvailableDescriptionLanguages() = 0;
 174    virtual MD5SumValue Description_md5() = 0;
 175    virtual unsigned short VersionHash() = 0;
 176    /** compare currently parsed version with given version
 177     *
 178     * \param Hash of the currently parsed version
 179     * \param Ver to compare with
 180     */
 181 #if APT_PKG_ABI >= 413
 182    virtual
 183 #endif
 184       APT_PURE bool SameVersion(unsigned short const Hash, pkgCache::VerIterator const &Ver);
 185    virtual bool UsePackage(pkgCache::PkgIterator &Pkg,
 186                            pkgCache::VerIterator &Ver) = 0;
 187    virtual map_filesize_t Offset() = 0;
 188    virtual map_filesize_t Size() = 0;
 189
 190    virtual bool Step() = 0;
 191
 192    inline bool HasFileDeps() {return FoundFileDeps;};
 193    virtual bool CollectFileProvides(pkgCache &/*Cache*/,
 194                                     pkgCache::VerIterator &/*Ver*/) {return true;};
 195
 196    ListParser() : Owner(NULL), OldDepLast(NULL), FoundFileDeps(false) {};
 197    virtual ~ListParser() {};
 198 };
 199                                                                         /*}}}*/
 200
 201 bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
 202                         MMap **OutMap = 0,bool AllowMem = false);
 203 bool pkgMakeOnlyStatusCache(OpProgress &Progress,DynamicMMap **OutMap);
 204
 205 #endif