X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/e8afd16892e87a6e2f17c1019ee455f5583387c2..0b7e63ccd7fa0ae6d0298b96a54f94d507ae50f4:/apt-pkg/depcache.h

diff --git a/apt-pkg/depcache.h b/apt-pkg/depcache.h
index 0594a253d..99d0e7a63 100644
--- a/apt-pkg/depcache.h
+++ b/apt-pkg/depcache.h
@@ -163,7 +163,7 @@ class pkgDepCache : protected pkgCache::Namespace
     */
    class ActionGroup
    {
-       void *d;
+       void * const d;
        pkgDepCache &cache;
 
        bool released;
@@ -204,12 +204,12 @@ class pkgDepCache : protected pkgCache::Namespace
      DefaultRootSetFunc() : Configuration::MatchAgainstConfig("APT::NeverAutoRemove") {};
      virtual ~DefaultRootSetFunc() {};
 
-     bool InRootSet(const pkgCache::PkgIterator &pkg) { return pkg.end() == false && Match(pkg.Name()); };
+     bool InRootSet(const pkgCache::PkgIterator &pkg) APT_OVERRIDE { return pkg.end() == false && Match(pkg.Name()); };
    };
 
    struct StateCache
    {
-      // Epoch stripped text versions of the two version fields
+      // text versions of the two version fields
       const char *CandVersion;
       const char *CurVersion;
 
@@ -240,7 +240,7 @@ class pkgDepCache : protected pkgCache::Namespace
       unsigned char DepState;          // DepState Flags
 
       // Update of candidate version
-      const char *StripEpoch(const char *Ver) APT_PURE;
+      APT_DEPRECATED_MSG("Use the method of the same name in contrib/strutl.h instead if you must") const char *StripEpoch(const char *Ver) APT_PURE;
       void Update(PkgIterator Pkg,pkgCache &Cache);
       
       // Various test members for the current status of the package
@@ -250,7 +250,7 @@ class pkgDepCache : protected pkgCache::Namespace
       inline bool Keep() const {return Mode == ModeKeep;};
       inline bool Protect() const {return (iFlags & Protected) == Protected;};
       inline bool Upgrade() const {return Status > 0 && Mode == ModeInstall;};
-      inline bool Upgradable() const {return Status >= 1;};
+      inline bool Upgradable() const {return Status >= 1 && CandidateVer != NULL;};
       inline bool Downgrade() const {return Status < 0 && Mode == ModeInstall;};
       inline bool Held() const {return Status != 0 && Keep();};
       inline bool NowBroken() const {return (DepState & DepNowMin) != DepNowMin;};
@@ -267,7 +267,7 @@ class pkgDepCache : protected pkgCache::Namespace
    
    // Helper functions
    void BuildGroupOrs(VerIterator const &V);
-   void UpdateVerState(PkgIterator Pkg);
+   void UpdateVerState(PkgIterator const &Pkg);
 
    // User Policy control
    class Policy
@@ -279,8 +279,9 @@ class pkgDepCache : protected pkgCache::Namespace
       }
 
       virtual VerIterator GetCandidateVer(PkgIterator const &Pkg);
-      virtual bool IsImportantDep(DepIterator const &Dep);
+      virtual bool IsImportantDep(DepIterator const &Dep) const;
       virtual signed short GetPriority(PkgIterator const &Pkg);
+      virtual signed short GetPriority(VerIterator const &Ver, bool ConsiderFiles=true);
       virtual signed short GetPriority(PkgFileIterator const &File);
 
       virtual ~Policy() {};
@@ -323,18 +324,18 @@ class pkgDepCache : protected pkgCache::Namespace
    Policy *LocalPolicy;
    
    // Check for a matching provides
-   bool CheckDep(DepIterator Dep,int Type,PkgIterator &Res);
-   inline bool CheckDep(DepIterator Dep,int Type)
+   bool CheckDep(DepIterator const &Dep,int const Type,PkgIterator &Res);
+   inline bool CheckDep(DepIterator const &Dep,int const Type)
    {
       PkgIterator Res(*this,0);
       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);
+   unsigned char DependencyState(DepIterator const &D);
+   unsigned char VersionState(DepIterator D,unsigned char const Check,
+			      unsigned char const SetMin,
+			      unsigned char const SetPolicy) const;
 
    // Recalculates various portions of the cache, call after changing something
    void Update(DepIterator Dep);           // Mostly internal
@@ -359,10 +360,11 @@ class pkgDepCache : protected pkgCache::Namespace
 
    inline pkgCache &GetCache() {return *Cache;};
    inline pkgVersioningSystem &VS() {return *Cache->VS;};
-   
+
    // Policy implementation
-   inline VerIterator GetCandidateVer(PkgIterator const &Pkg) {return LocalPolicy->GetCandidateVer(Pkg);};
-   inline bool IsImportantDep(DepIterator Dep) {return LocalPolicy->IsImportantDep(Dep);};
+   APT_DEPRECATED_MSG("Confusingly named method which returns the candidate as chosen by policy (NOT as chosen via .SetCandidateVersion!). You probably want to use .GetCandidateVersion instead.") inline VerIterator GetCandidateVer(PkgIterator const &Pkg) {return /* GetCandidateVersion(Pkg); but for API compat: */ LocalPolicy->GetCandidateVer(Pkg);};
+
+   inline bool IsImportantDep(DepIterator Dep) const {return LocalPolicy->IsImportantDep(Dep);};
    inline Policy &GetPolicy() {return *LocalPolicy;};
    
    // Accessors
@@ -412,6 +414,16 @@ class pkgDepCache : protected pkgCache::Namespace
    void MarkProtected(PkgIterator const &Pkg) { PkgState[Pkg->ID].iFlags |= Protected; };
 
    void SetReInstall(PkgIterator const &Pkg,bool To);
+
+   /** @return 'the' candidate version of a package
+    *
+    * The version returned is the version previously set explicitly via
+    * SetCandidate* methods like #SetCandidateVersion or if there wasn't one
+    * set the version as chosen via #Policy.
+    *
+    * @param Pkg is the package to return the candidate for
+    */
+   pkgCache::VerIterator GetCandidateVersion(pkgCache::PkgIterator const &Pkg);
    void SetCandidateVersion(VerIterator TargetVer);
    bool SetCandidateRelease(pkgCache::VerIterator TargetVer,
 				std::string const &TargetRel);
@@ -471,8 +483,8 @@ class pkgDepCache : protected pkgCache::Namespace
 			    unsigned long Depth = 0, bool FromUser = true);
 
    // read persistent states
-   bool readStateFile(OpProgress *prog);
-   bool writeStateFile(OpProgress *prog, bool InstalledOnly=true);
+   bool readStateFile(OpProgress * const prog);
+   bool writeStateFile(OpProgress * const prog, bool const InstalledOnly=true);
    
    // Size queries
    inline signed long long UsrSize() {return iUsrSize;};
@@ -484,11 +496,11 @@ class pkgDepCache : protected pkgCache::Namespace
    inline unsigned long PolicyBrokenCount() {return iPolicyBrokenCount;};
    inline unsigned long BadCount() {return iBadCount;};
 
-   bool Init(OpProgress *Prog);
+   bool Init(OpProgress * const Prog);
    // Generate all state information
-   void Update(OpProgress *Prog = 0);
+   void Update(OpProgress * const Prog = 0);
 
-   pkgDepCache(pkgCache *Cache,Policy *Plcy = 0);
+   pkgDepCache(pkgCache * const Cache,Policy * const Plcy = 0);
    virtual ~pkgDepCache();
 
    protected:
@@ -503,7 +515,7 @@ class pkgDepCache : protected pkgCache::Namespace
 	 bool const rPurge, unsigned long const Depth, bool const FromUser);
 
    private:
-   void *d;
+   void * const d;
 
    APT_HIDDEN bool IsModeChangeOk(ModeList const mode, PkgIterator const &Pkg,
 			unsigned long const Depth, bool const FromUser);