// -*- mode: cpp; mode: fold -*- // Description /*{{{*/ // $Id: depcache.h,v 1.3 1998/07/12 23:58:25 jgg Exp $ /* ###################################################################### DepCache - Dependency Extension data for the cache This class stores the cache data and a set of extension structures for monitoring the current state of all the packages. It also generates and caches the 'install' state of many things. This refers to the state of the package after an install has been run. The StateCache::State field can be -1,0,1,2 which is <,=,>,no current. StateCache::Mode is which of the 3 fields is active. This structure is important to support the readonly status of the cache file. When the data is saved the cache will be refereshed from our internal rep and written to disk. Then the actual persistant data files will be put on the disk. Each dependency is compared against 3 target versions to produce to 3 dependency results. Now - Compared using the Currently install version Install - Compared using the install version (final state) CVer - (Candidate Verion) Compared using the Candidate Version The candidate and now results are used to decide wheather a package should be automatically installed or if it should be left alone. Remember, the Candidate Version is selected based on the distribution settings for the Package. The Install Version is selected based on the state (Delete, Keep, Install) field and can be either the Current Version or the Candidate version. The Candidate version is what is shown the 'Install Version' field. ##################################################################### */ /*}}}*/ // Header section: pkglib #ifndef PKGLIB_DEPCACHE_H #define PKGLIB_DEPCACHE_H #ifdef __GNUG__ #pragma interface "apt-pkg/depcache.h" #endif #include class pkgDepCache : public pkgCache { public: // These flags are used in DepState enum DepFlags {DepNow = (1 << 0),DepInstall = (1 << 1),DepCVer = (1 << 2), DepGNow = (1 << 3),DepGInstall = (1 << 4),DepGCVer = (1 << 5)}; // These flags are used in StateCache::DepState enum DepStateFlags {DepNowPolicy = (1 << 0), DepNowMin = (1 << 1), DepInstPolicy = (1 << 2), DepInstMin = (1 << 3), DepCandPolicy = (1 << 4), DepCandMin = (1 << 5)}; // These flags are used in StateCache::iFlags enum InternalFlags {AutoKept = (1 << 0)}; enum VersionTypes {NowVersion, InstallVersion, CandidateVersion}; enum ModeList {ModeDelete = 0, ModeKeep = 1, ModeInstall = 2}; struct StateCache { // Epoch stripped text versions of the two version fields const char *CandVersion; const char *CurVersion; // Pointer to the candidate install version. Version *CandidateVer; // Pointer to the install version. Version *InstallVer; // Various tree indicators signed char Status; // -1,0,1,2 unsigned char Mode; // ModeList unsigned char DepState; // DepState Flags // Copy of Package::Flags unsigned short Flags; unsigned short iFlags; // Internal flags // Update of candidate version const char *StripEpoch(const char *Ver); void Update(PkgIterator Pkg,pkgCache &Cache); // Various test members for the current status of the package inline bool NewInstall() const {return Status == 2 && Mode == ModeInstall;}; inline bool Delete() const {return Mode == ModeDelete;}; inline bool Keep() const {return Mode == ModeKeep;}; inline bool Upgrade() const {return Status > 0 && Mode == ModeInstall;}; inline bool Upgradable() const {return Status == 1;}; inline bool Downgrade() const {return Status < 0;}; inline bool Held() const {return Status != 0 && Keep();}; inline bool NowBroken() const {return (DepState & DepNowMin) != DepNowMin;}; inline bool InstBroken() const {return (DepState & DepInstMin) != DepInstMin;}; inline bool Install() const {return Mode == ModeInstall;}; inline VerIterator InstVerIter(pkgCache &Cache) {return VerIterator(Cache,InstallVer);}; inline VerIterator CandidateVerIter(pkgCache &Cache) {return VerIterator(Cache,CandidateVer);}; }; // Helper functions void BuildGroupOrs(VerIterator const &V); void UpdateVerState(PkgIterator Pkg); bool Init(); protected: // State information StateCache *PkgState; unsigned char *DepState; long iUsrSize; long iDownloadSize; long iInstCount; long iDelCount; long iKeepCount; long iBrokenCount; long iBadCount; // Check for a matching provides bool CheckDep(DepIterator Dep,int Type,PkgIterator &Res); inline bool CheckDep(DepIterator Dep,int Type) { PkgIterator Res(*this); return CheckDep(Dep,Type,Res); } // Computes state information for deps and versions (w/o storing) unsigned char DependencyState(DepIterator &D); unsigned char VersionState(DepIterator D,unsigned char Check, unsigned char SetMin, unsigned char SetPolicy); // Recalculates various portions of the cache, call after changing something void Update(DepIterator Dep); // Mostly internal void Update(PkgIterator const &P); // Count manipulators void AddSizes(const PkgIterator &Pkg,long Mult = 1); inline void RemoveSizes(const PkgIterator &Pkg) {AddSizes(Pkg,-1);}; void AddStates(const PkgIterator &Pkg,int Add = 1); inline void RemoveStates(const PkgIterator &Pkg) {AddStates(Pkg,-1);}; public: // Policy implementation virtual VerIterator GetCandidateVer(PkgIterator Pkg); virtual bool IsImportantDep(DepIterator Dep); // Accessors inline StateCache &operator [](PkgIterator const &I) {return PkgState[I->ID];}; inline unsigned char &operator [](DepIterator const &I) {return DepState[I->ID];}; // Manipulators void MarkKeep(PkgIterator const &Pkg,bool Soft = false); void MarkDelete(PkgIterator const &Pkg); void MarkInstall(PkgIterator const &Pkg,bool AutoInst = true); // This is for debuging void Update(); // Hook to keep the extra data in sync virtual bool ReMap(); // Size queries inline long UsrSize() {return iUsrSize;}; inline long DebSize() {return iDownloadSize;}; inline long DelCount() {return iDelCount;}; inline long KeepCount() {return iKeepCount;}; inline long InstCount() {return iInstCount;}; inline long BrokenCount() {return iBrokenCount;}; inline long BadCount() {return iBadCount;}; pkgDepCache(MMap &Map); virtual ~pkgDepCache(); }; #endif