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