fileutl: simple_buffer: Add write() and full() methods

[apt.git] / apt-pkg / depcache.h

diff --git a/apt-pkg/depcache.h b/apt-pkg/depcache.h
index 7358048ed55dec79fa3370fcdc1f860031fc7239..10f869f252b158014d41f5a6fcb118caa46a6a6c 100644 (file)
--- a/apt-pkg/depcache.h
+++ b/apt-pkg/depcache.h
@@ -1,6 +1,5 @@
 // -*- mode: c++; mode: fold -*-
 // Description                                                         /*{{{*/
 // -*- mode: c++; mode: fold -*-
 // Description                                                         /*{{{*/

-// $Id: depcache.h,v 1.14 2001/02/20 07:03:17 jgg Exp $

 /* ######################################################################
 
    DepCache - Dependency Extension data for the cache
 /* ######################################################################
 
    DepCache - Dependency Extension data for the cache


@@ -15,7 +14,7 @@
    
    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 
    
    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 
+   internal rep and written to disk. Then the actual persistent data

    files will be put on the disk.
 
    Each dependency is compared against 3 target versions to produce to
    files will be put on the disk.
 
    Each dependency is compared against 3 target versions to produce to


@@ -40,18 +39,27 @@
 
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/pkgcache.h>
 
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/pkgcache.h>

+#include <apt-pkg/cacheiterators.h>
+#include <apt-pkg/macros.h>
+
+#include <stddef.h>

 
 

-#include <vector>

 #include <memory>
 #include <memory>

-#include <set>

 #include <list>
 #include <list>

+#include <string>
+#include <utility>

 
 #ifndef APT_8_CLEANER_HEADERS
 #include <apt-pkg/progress.h>
 #include <apt-pkg/error.h>
 #endif
 
 #ifndef APT_8_CLEANER_HEADERS
 #include <apt-pkg/progress.h>
 #include <apt-pkg/error.h>
 #endif

+#ifndef APT_10_CLEANER_HEADERS
+#include <set>
+#include <vector>
+#endif

 
 class OpProgress;
 
 class OpProgress;

+class pkgVersioningSystem;

 
 class pkgDepCache : protected pkgCache::Namespace
 {
 
 class pkgDepCache : protected pkgCache::Namespace
 {


@@ -61,7 +69,7 @@ class pkgDepCache : protected pkgCache::Namespace
    class InRootSetFunc
    {
    public:
    class InRootSetFunc
    {
    public:

-     virtual bool InRootSet(const pkgCache::PkgIterator &pkg) {return false;};
+     virtual bool InRootSet(const pkgCache::PkgIterator &/*pkg*/) {return false;};

      virtual ~InRootSetFunc() {};
    };
 
      virtual ~InRootSetFunc() {};
    };
 


@@ -82,7 +90,7 @@ class pkgDepCache : protected pkgCache::Namespace
     *  \param follow_suggests If \b true, suggestions of the package
     *  will be recursively marked.
     */
     *  \param follow_suggests If \b true, suggestions of the package
     *  will be recursively marked.
     */

-   void MarkPackage(const pkgCache::PkgIterator &pkg,
+   APT_HIDDEN void MarkPackage(const pkgCache::PkgIterator &pkg,

                    const pkgCache::VerIterator &ver,
                    bool const &follow_recommends,
                    bool const &follow_suggests);
                    const pkgCache::VerIterator &ver,
                    bool const &follow_recommends,
                    bool const &follow_suggests);


@@ -128,7 +136,7 @@ class pkgDepCache : protected pkgCache::Namespace
    enum InternalFlags {AutoKept = (1 << 0), Purge = (1 << 1), ReInstall = (1 << 2), Protected = (1 << 3)};
       
    enum VersionTypes {NowVersion, InstallVersion, CandidateVersion};
    enum InternalFlags {AutoKept = (1 << 0), Purge = (1 << 1), ReInstall = (1 << 2), Protected = (1 << 3)};
       
    enum VersionTypes {NowVersion, InstallVersion, CandidateVersion};

-   enum ModeList {ModeDelete = 0, ModeKeep = 1, ModeInstall = 2};
+   enum ModeList {ModeDelete = 0, ModeKeep = 1, ModeInstall = 2, ModeGarbage = 3};

 
    /** \brief Represents an active action group.
     *
 
    /** \brief Represents an active action group.
     *


@@ -155,12 +163,13 @@ class pkgDepCache : protected pkgCache::Namespace
     */
    class ActionGroup
    {
     */
    class ActionGroup
    {

+       void * const d;

        pkgDepCache &cache;
 
        bool released;
 
        /** Action groups are noncopyable. */
        pkgDepCache &cache;
 
        bool released;
 
        /** Action groups are noncopyable. */

-       ActionGroup(const ActionGroup &other);
+       APT_HIDDEN ActionGroup(const ActionGroup &other);

    public:
        /** \brief Create a new ActionGroup.
        *
    public:
        /** \brief Create a new ActionGroup.
        *


@@ -170,7 +179,7 @@ class pkgDepCache : protected pkgCache::Namespace
        *  As long as this object exists, no automatic cleanup
        *  operations will be undertaken.
        */
        *  As long as this object exists, no automatic cleanup
        *  operations will be undertaken.
        */

-       ActionGroup(pkgDepCache &cache);
+       explicit ActionGroup(pkgDepCache &cache);

 
        /** \brief Clean up the action group before it is destroyed.
         *
 
        /** \brief Clean up the action group before it is destroyed.
         *


@@ -183,7 +192,7 @@ class pkgDepCache : protected pkgCache::Namespace
        *  If this is the last action group, the automatic cache
        *  cleanup operations will be undertaken.
        */
        *  If this is the last action group, the automatic cache
        *  cleanup operations will be undertaken.
        */

-       ~ActionGroup();
+       virtual ~ActionGroup();

    };
 
    /** \brief Returns \b true for packages matching a regular
    };
 
    /** \brief Returns \b true for packages matching a regular


@@ -195,7 +204,7 @@ class pkgDepCache : protected pkgCache::Namespace
      DefaultRootSetFunc() : Configuration::MatchAgainstConfig("APT::NeverAutoRemove") {};
      virtual ~DefaultRootSetFunc() {};
 
      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
    };
 
    struct StateCache


@@ -231,7 +240,7 @@ class pkgDepCache : protected pkgCache::Namespace
       unsigned char DepState;          // DepState Flags
 
       // Update of candidate version
       unsigned char DepState;          // DepState Flags
 
       // Update of candidate version

-      const char *StripEpoch(const char *Ver);
+      const char *StripEpoch(const char *Ver) APT_PURE;

       void Update(PkgIterator Pkg,pkgCache &Cache);
       
       // Various test members for the current status of the package
       void Update(PkgIterator Pkg,pkgCache &Cache);
       
       // Various test members for the current status of the package


@@ -241,7 +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 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;};
       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;};


@@ -258,7 +267,7 @@ class pkgDepCache : protected pkgCache::Namespace
    
    // Helper functions
    void BuildGroupOrs(VerIterator const &V);
    
    // Helper functions
    void BuildGroupOrs(VerIterator const &V);

-   void UpdateVerState(PkgIterator Pkg);
+   void UpdateVerState(PkgIterator const &Pkg);

 
    // User Policy control
    class Policy
 
    // User Policy control
    class Policy


@@ -270,8 +279,9 @@ class pkgDepCache : protected pkgCache::Namespace
       }
 
       virtual VerIterator GetCandidateVer(PkgIterator const &Pkg);
       }
 
       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(PkgIterator const &Pkg);

+      virtual signed short GetPriority(VerIterator const &Ver, bool ConsiderFiles=true);

       virtual signed short GetPriority(PkgFileIterator const &File);
 
       virtual ~Policy() {};
       virtual signed short GetPriority(PkgFileIterator const &File);
 
       virtual ~Policy() {};


@@ -314,18 +324,18 @@ class pkgDepCache : protected pkgCache::Namespace
    Policy *LocalPolicy;
    
    // Check for a matching provides
    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)
    {
       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
 
    // Recalculates various portions of the cache, call after changing something
    void Update(DepIterator Dep);           // Mostly internal


@@ -350,10 +360,11 @@ class pkgDepCache : protected pkgCache::Namespace
 
    inline pkgCache &GetCache() {return *Cache;};
    inline pkgVersioningSystem &VS() {return *Cache->VS;};
 
    inline pkgCache &GetCache() {return *Cache;};
    inline pkgVersioningSystem &VS() {return *Cache->VS;};

-   
+

    // Policy implementation
    // 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
    inline Policy &GetPolicy() {return *LocalPolicy;};
    
    // Accessors


@@ -381,25 +392,14 @@ class pkgDepCache : protected pkgCache::Namespace
    /** \brief Update the Marked and Garbage fields of all packages.
     *
     *  This routine is implicitly invoked after all state manipulators
    /** \brief Update the Marked and Garbage fields of all packages.
     *
     *  This routine is implicitly invoked after all state manipulators

-    *  and when an ActionGroup is destroyed.  It invokes #MarkRequired
-    *  and #Sweep to do its dirty work.
+    *  and when an ActionGroup is destroyed.  It invokes the private
+    *  MarkRequired() and Sweep() to do its dirty work.

     *
     *  \param rootFunc A predicate that returns \b true for packages
     *  that should be added to the root set.
     */
     *
     *  \param rootFunc A predicate that returns \b true for packages
     *  that should be added to the root set.
     */

-   bool MarkAndSweep(InRootSetFunc &rootFunc)
-   {
-     return MarkRequired(rootFunc) && Sweep();
-   }
-
-   bool MarkAndSweep()
-   {
-     std::auto_ptr<InRootSetFunc> f(GetRootSetFunc());
-     if(f.get() != NULL)
-       return MarkAndSweep(*f.get());
-     else
-       return false;
-   }
+   bool MarkAndSweep(InRootSetFunc &rootFunc);
+   bool MarkAndSweep();

 
    /** \name State Manipulators
     */
 
    /** \name State Manipulators
     */


@@ -414,6 +414,16 @@ class pkgDepCache : protected pkgCache::Namespace
    void MarkProtected(PkgIterator const &Pkg) { PkgState[Pkg->ID].iFlags |= Protected; };
 
    void SetReInstall(PkgIterator const &Pkg,bool To);
    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);
    void SetCandidateVersion(VerIterator TargetVer);
    bool SetCandidateRelease(pkgCache::VerIterator TargetVer,
                                std::string const &TargetRel);


@@ -442,16 +452,15 @@ class pkgDepCache : protected pkgCache::Namespace
    /** \return \b true if it's OK for MarkInstall to install
     *  the given package.
     *
    /** \return \b true if it's OK for MarkInstall to install
     *  the given package.
     *

-    *  See the default implementation for a simple example how this
-    *  method can be used.
-    *  Overriding implementations should use the hold-state-flag to cache
-    *  results from previous checks of this package - also it should
-    *  be used if the default resolver implementation is also used to
-    *  ensure that these packages are handled like "normal" dpkg holds.
+    *  The default implementation simply calls all IsInstallOk*
+    *  method mentioned below.
+    *
+    *  Overriding implementations should use the hold-state-flag to
+    *  cache results from previous checks of this package - if possible.

     *
     *  The parameters are the same as in the calling MarkInstall:
     *  \param Pkg       the package that MarkInstall wants to install.
     *
     *  The parameters are the same as in the calling MarkInstall:
     *  \param Pkg       the package that MarkInstall wants to install.

-    *  \param AutoInst  needs a previous MarkInstall this package?
+    *  \param AutoInst  install this and all its dependencies

     *  \param Depth     recursive deep of this Marker call
     *  \param FromUser  was the install requested by the user?
     */
     *  \param Depth     recursive deep of this Marker call
     *  \param FromUser  was the install requested by the user?
     */


@@ -461,16 +470,12 @@ class pkgDepCache : protected pkgCache::Namespace
    /** \return \b true if it's OK for MarkDelete to remove
     *  the given package.
     *
    /** \return \b true if it's OK for MarkDelete to remove
     *  the given package.
     *

-    *  See the default implementation for a simple example how this
-    *  method can be used.
-    *  Overriding implementations should use the hold-state-flag to cache
-    *  results from previous checks of this package - also it should
-    *  be used if the default resolver implementation is also used to
-    *  ensure that these packages are handled like "normal" dpkg holds.
+    *  The default implementation simply calls all IsDeleteOk*
+    *  method mentioned below, see also #IsInstallOk.

     *
     *  The parameters are the same as in the calling MarkDelete:
     *  \param Pkg       the package that MarkDelete wants to remove.
     *
     *  The parameters are the same as in the calling MarkDelete:
     *  \param Pkg       the package that MarkDelete wants to remove.

-    *  \param Purge     should we purge instead of "only" remove?
+    *  \param MarkPurge should we purge instead of "only" remove?

     *  \param Depth     recursive deep of this Marker call
     *  \param FromUser  was the remove requested by the user?
     */
     *  \param Depth     recursive deep of this Marker call
     *  \param FromUser  was the remove requested by the user?
     */


@@ -478,8 +483,8 @@ class pkgDepCache : protected pkgCache::Namespace
                            unsigned long Depth = 0, bool FromUser = true);
 
    // read persistent states
                            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;};
    
    // Size queries
    inline signed long long UsrSize() {return iUsrSize;};


@@ -491,15 +496,28 @@ class pkgDepCache : protected pkgCache::Namespace
    inline unsigned long PolicyBrokenCount() {return iPolicyBrokenCount;};
    inline unsigned long BadCount() {return iBadCount;};
 
    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
    // 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();
 
    virtual ~pkgDepCache();
 

+   protected:
+   // methods call by IsInstallOk
+   bool IsInstallOkMultiArchSameVersionSynced(PkgIterator const &Pkg,
+        bool const AutoInst, unsigned long const Depth, bool const FromUser);
+   bool IsInstallOkDependenciesSatisfiableByCandidates(PkgIterator const &Pkg,
+      bool const AutoInst, unsigned long const Depth, bool const FromUser);
+
+   // methods call by IsDeleteOk
+   bool IsDeleteOkProtectInstallRequests(PkgIterator const &Pkg,
+        bool const rPurge, unsigned long const Depth, bool const FromUser);
+

    private:
    private:

-   bool IsModeChangeOk(ModeList const mode, PkgIterator const &Pkg,
+   void * const d;
+
+   APT_HIDDEN bool IsModeChangeOk(ModeList const mode, PkgIterator const &Pkg,

                        unsigned long const Depth, bool const FromUser);
 };
 
                        unsigned long const Depth, bool const FromUser);
 };