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
  26 class pkgSourceList;
  27 class OpProgress;
  28 class MMap;
  29 class pkgIndexFile;
  30
  31 class pkgCacheGenerator                                                 /*{{{*/
  32 {
  33    private:
  34
  35    pkgCache::StringItem *UniqHash[26];
  36    unsigned long WriteStringInMap(std::string const &String) { return WriteStringInMap(String.c_str()); };
  37    unsigned long WriteStringInMap(const char *String);
  38    unsigned long WriteStringInMap(const char *String, const unsigned long &Len);
  39    unsigned long AllocateInMap(const unsigned long &size);
  40
  41    public:
  42
  43    class ListParser;
  44    friend class ListParser;
  45
  46    protected:
  47
  48    DynamicMMap &Map;
  49    pkgCache Cache;
  50    OpProgress *Progress;
  51
  52    string PkgFileName;
  53    pkgCache::PackageFile *CurrentFile;
  54
  55    // Flag file dependencies
  56    bool FoundFileDeps;
  57
  58    bool NewGroup(pkgCache::GrpIterator &Grp,const string &Name);
  59    bool NewPackage(pkgCache::PkgIterator &Pkg,const string &Name, const string &Arch);
  60    bool NewFileVer(pkgCache::VerIterator &Ver,ListParser &List);
  61    bool NewFileDesc(pkgCache::DescIterator &Desc,ListParser &List);
  62    bool NewDepends(pkgCache::PkgIterator &Pkg, pkgCache::VerIterator &Ver,
  63                    string const &Version, unsigned int const &Op,
  64                    unsigned int const &Type, map_ptrloc *OldDepLast);
  65    unsigned long NewVersion(pkgCache::VerIterator &Ver,const string &VerStr,unsigned long Next);
  66    map_ptrloc NewDescription(pkgCache::DescIterator &Desc,const string &Lang,const MD5SumValue &md5sum,map_ptrloc Next);
  67
  68    public:
  69
  70    unsigned long WriteUniqString(const char *S,unsigned int Size);
  71    inline unsigned long WriteUniqString(const string &S) {return WriteUniqString(S.c_str(),S.length());};
  72
  73    void DropProgress() {Progress = 0;};
  74    bool SelectFile(const string &File,const string &Site,pkgIndexFile const &Index,
  75                    unsigned long Flags = 0);
  76    bool MergeList(ListParser &List,pkgCache::VerIterator *Ver = 0);
  77    inline pkgCache &GetCache() {return Cache;};
  78    inline pkgCache::PkgFileIterator GetCurFile()
  79          {return pkgCache::PkgFileIterator(Cache,CurrentFile);};
  80
  81    bool HasFileDeps() {return FoundFileDeps;};
  82    bool MergeFileProvides(ListParser &List);
  83    bool FinishCache(OpProgress *Progress);
  84
  85    static bool MakeStatusCache(pkgSourceList &List,OpProgress *Progress,
  86                         MMap **OutMap = 0,bool AllowMem = false);
  87    static bool MakeOnlyStatusCache(OpProgress *Progress,DynamicMMap **OutMap);
  88
  89    pkgCacheGenerator(DynamicMMap *Map,OpProgress *Progress);
  90    ~pkgCacheGenerator();
  91 };
  92                                                                         /*}}}*/
  93 // This is the abstract package list parser class.                      /*{{{*/
  94 class pkgCacheGenerator::ListParser
  95 {
  96    pkgCacheGenerator *Owner;
  97    friend class pkgCacheGenerator;
  98
  99    // Some cache items
 100    pkgCache::VerIterator OldDepVer;
 101    map_ptrloc *OldDepLast;
 102
 103    // Flag file dependencies
 104    bool FoundFileDeps;
 105
 106    protected:
 107
 108    inline unsigned long WriteUniqString(string S) {return Owner->WriteUniqString(S);};
 109    inline unsigned long WriteUniqString(const char *S,unsigned int Size) {return Owner->WriteUniqString(S,Size);};
 110    inline unsigned long WriteString(const string &S) {return Owner->WriteStringInMap(S);};
 111    inline unsigned long WriteString(const char *S,unsigned int Size) {return Owner->WriteStringInMap(S,Size);};
 112    bool NewDepends(pkgCache::VerIterator &Ver,const string &Package, const string &Arch,
 113                    const string &Version,unsigned int Op,
 114                    unsigned int Type);
 115    bool NewProvides(pkgCache::VerIterator &Ver,const string &PkgName,
 116                     const string &PkgArch, const string &Version);
 117
 118    public:
 119
 120    // These all operate against the current section
 121    virtual string Package() = 0;
 122    virtual string Architecture() = 0;
 123    virtual bool ArchitectureAll() = 0;
 124    virtual string Version() = 0;
 125    virtual bool NewVersion(pkgCache::VerIterator &Ver) = 0;
 126    virtual string Description() = 0;
 127    virtual string DescriptionLanguage() = 0;
 128    virtual MD5SumValue Description_md5() = 0;
 129    virtual unsigned short VersionHash() = 0;
 130    virtual bool UsePackage(pkgCache::PkgIterator &Pkg,
 131                            pkgCache::VerIterator &Ver) = 0;
 132    virtual unsigned long Offset() = 0;
 133    virtual unsigned long Size() = 0;
 134
 135    virtual bool Step() = 0;
 136
 137    inline bool HasFileDeps() {return FoundFileDeps;};
 138    virtual bool CollectFileProvides(pkgCache &Cache,
 139                                     pkgCache::VerIterator &Ver) {return true;};
 140
 141    ListParser() : FoundFileDeps(false) {};
 142    virtual ~ListParser() {};
 143 };
 144                                                                         /*}}}*/
 145
 146 bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
 147                         MMap **OutMap = 0,bool AllowMem = false);
 148 bool pkgMakeOnlyStatusCache(OpProgress &Progress,DynamicMMap **OutMap);
 149
 150
 151 #ifdef APT_COMPATIBILITY
 152 #if APT_COMPATIBILITY != 986
 153 #warning "Using APT_COMPATIBILITY"
 154 #endif
 155 MMap *pkgMakeStatusCacheMem(pkgSourceList &List,OpProgress &Progress)
 156 {
 157    MMap *Map = 0;
 158    if (pkgCacheGenerator::MakeStatusCache(List,&Progress,&Map,true) == false)
 159       return 0;
 160    return Map;
 161 }
 162 #endif
 163
 164 #endif