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