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[apt.git] / apt-pkg / algorithms.cc

diff --git a/apt-pkg/algorithms.cc b/apt-pkg/algorithms.cc
index 0363ab3e2ec0a5125aa36062e08825617c8e6710..b173979c3a4f5eaf25dcef28c488de9e0a8ddb1f 100644 (file)
--- a/apt-pkg/algorithms.cc
+++ b/apt-pkg/algorithms.cc
@@ -19,32 +19,28 @@
 #include <apt-pkg/algorithms.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/algorithms.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>

-#include <apt-pkg/version.h>
-#include <apt-pkg/sptr.h>
-#include <apt-pkg/acquire-item.h>

 #include <apt-pkg/edsp.h>
 #include <apt-pkg/edsp.h>

-#include <apt-pkg/sourcelist.h>
-#include <apt-pkg/fileutl.h>
-#include <apt-pkg/progress.h>
-
-#include <sys/types.h>
+#include <apt-pkg/depcache.h>
+#include <apt-pkg/packagemanager.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/cacheiterators.h>
+#include <apt-pkg/prettyprinters.h>
+
+#include <string.h>
+#include <string>

 #include <cstdlib>
 #include <cstdlib>

-#include <algorithm>

 #include <iostream>
 #include <iostream>

-#include <stdio.h>

 
 #include <apti18n.h>
                                                                        /*}}}*/
 using namespace std;
 
 
 #include <apti18n.h>
                                                                        /*}}}*/
 using namespace std;
 

-pkgProblemResolver *pkgProblemResolver::This = 0;
-

 // Simulate::Simulate - Constructor                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* The legacy translations here of input Pkg iterators is obsolete, 
    this is not necessary since the pkgCaches are fully shared now. */
 pkgSimulate::pkgSimulate(pkgDepCache *Cache) : pkgPackageManager(Cache),
 // Simulate::Simulate - Constructor                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* The legacy translations here of input Pkg iterators is obsolete, 
    this is not necessary since the pkgCaches are fully shared now. */
 pkgSimulate::pkgSimulate(pkgDepCache *Cache) : pkgPackageManager(Cache),

-                           iPolicy(Cache),
+                           d(NULL), iPolicy(Cache),

                            Sim(&Cache->GetCache(),&iPolicy),
                            group(Sim)
 {
                            Sim(&Cache->GetCache(),&iPolicy),
                            group(Sim)
 {


@@ -363,13 +359,11 @@ pkgProblemResolver::~pkgProblemResolver()
 // ProblemResolver::ScoreSort - Sort the list by score                 /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // ProblemResolver::ScoreSort - Sort the list by score                 /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-int pkgProblemResolver::ScoreSort(const void *a,const void *b)
+int pkgProblemResolver::ScoreSort(Package const *A,Package const *B)

 {
 {

-   Package const **A = (Package const **)a;
-   Package const **B = (Package const **)b;
-   if (This->Scores[(*A)->ID] > This->Scores[(*B)->ID])
+   if (Scores[A->ID] > Scores[B->ID])

       return -1;
       return -1;

-   if (This->Scores[(*A)->ID] < This->Scores[(*B)->ID])
+   if (Scores[A->ID] < Scores[B->ID])

       return 1;
    return 0;
 }
       return 1;
    return 0;
 }


@@ -394,8 +388,18 @@ void pkgProblemResolver::MakeScores()
    };
    int PrioEssentials = _config->FindI("pkgProblemResolver::Scores::Essentials",100);
    int PrioInstalledAndNotObsolete = _config->FindI("pkgProblemResolver::Scores::NotObsolete",1);
    };
    int PrioEssentials = _config->FindI("pkgProblemResolver::Scores::Essentials",100);
    int PrioInstalledAndNotObsolete = _config->FindI("pkgProblemResolver::Scores::NotObsolete",1);

-   int PrioDepends = _config->FindI("pkgProblemResolver::Scores::Depends",1);
-   int PrioRecommends = _config->FindI("pkgProblemResolver::Scores::Recommends",1);
+   int DepMap[] = {
+      0,
+      _config->FindI("pkgProblemResolver::Scores::Depends",1),
+      _config->FindI("pkgProblemResolver::Scores::PreDepends",1),
+      _config->FindI("pkgProblemResolver::Scores::Suggests",0),
+      _config->FindI("pkgProblemResolver::Scores::Recommends",1),
+      _config->FindI("pkgProblemResolver::Scores::Conflicts",-1),
+      _config->FindI("pkgProblemResolver::Scores::Replaces",0),
+      _config->FindI("pkgProblemResolver::Scores::Obsoletes",0),
+      _config->FindI("pkgProblemResolver::Scores::Breaks",-1),
+      _config->FindI("pkgProblemResolver::Scores::Enhances",0)
+   };

    int AddProtected = _config->FindI("pkgProblemResolver::Scores::AddProtected",10000);
    int AddEssential = _config->FindI("pkgProblemResolver::Scores::AddEssential",5000);
 
    int AddProtected = _config->FindI("pkgProblemResolver::Scores::AddProtected",10000);
    int AddEssential = _config->FindI("pkgProblemResolver::Scores::AddEssential",5000);
 


@@ -408,8 +412,15 @@ void pkgProblemResolver::MakeScores()
          << "  Extra => " << PrioMap[pkgCache::State::Extra] << endl
          << "  Essentials => " << PrioEssentials << endl
          << "  InstalledAndNotObsolete => " << PrioInstalledAndNotObsolete << endl
          << "  Extra => " << PrioMap[pkgCache::State::Extra] << endl
          << "  Essentials => " << PrioEssentials << endl
          << "  InstalledAndNotObsolete => " << PrioInstalledAndNotObsolete << endl

-         << "  Depends => " << PrioDepends << endl
-         << "  Recommends => " << PrioRecommends << endl
+         << "  Pre-Depends => " << DepMap[pkgCache::Dep::PreDepends] << endl
+         << "  Depends => " << DepMap[pkgCache::Dep::Depends] << endl
+         << "  Recommends => " << DepMap[pkgCache::Dep::Recommends] << endl
+         << "  Suggests => " << DepMap[pkgCache::Dep::Suggests] << endl
+         << "  Conflicts => " << DepMap[pkgCache::Dep::Conflicts] << endl
+         << "  Breaks => " << DepMap[pkgCache::Dep::DpkgBreaks] << endl
+         << "  Replaces => " << DepMap[pkgCache::Dep::Replaces] << endl
+         << "  Obsoletes => " << DepMap[pkgCache::Dep::Obsoletes] << endl
+         << "  Enhances => " << DepMap[pkgCache::Dep::Enhances] << endl

          << "  AddProtected => " << AddProtected << endl
          << "  AddEssential => " << AddEssential << endl;
 
          << "  AddProtected => " << AddProtected << endl
          << "  AddEssential => " << AddEssential << endl;
 


@@ -429,37 +440,39 @@ void pkgProblemResolver::MakeScores()
          || (I->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important)
         Score += PrioEssentials;
 
          || (I->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important)
         Score += PrioEssentials;
 

-      // We transform the priority
-      if (Cache[I].InstVerIter(Cache)->Priority <= 5)
-        Score += PrioMap[Cache[I].InstVerIter(Cache)->Priority];
-      
+      pkgCache::VerIterator const InstVer = Cache[I].InstVerIter(Cache);
+      // We apply priorities only to downloadable packages, all others are prio:extra
+      // as an obsolete prio:standard package can't be that standard anymore…
+      if (InstVer->Priority <= pkgCache::State::Extra && InstVer.Downloadable() == true)
+        Score += PrioMap[InstVer->Priority];
+      else
+        Score += PrioMap[pkgCache::State::Extra];
+

       /* This helps to fix oddball problems with conflicting packages
       /* This helps to fix oddball problems with conflicting packages

-         on the same level. We enhance the score of installed packages 
-        if those are not obsolete
-      */
+        on the same level. We enhance the score of installed packages
+        if those are not obsolete */

       if (I->CurrentVer != 0 && Cache[I].CandidateVer != 0 && Cache[I].CandidateVerIter(Cache).Downloadable())
         Score += PrioInstalledAndNotObsolete;
       if (I->CurrentVer != 0 && Cache[I].CandidateVer != 0 && Cache[I].CandidateVerIter(Cache).Downloadable())
         Score += PrioInstalledAndNotObsolete;

-   }

 
 

-   // Now that we have the base scores we go and propagate dependencies
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
-   {
-      if (Cache[I].InstallVer == 0)
-        continue;
-      
-      for (pkgCache::DepIterator D = Cache[I].InstVerIter(Cache).DependsList(); D.end() == false; ++D)
+      // propagate score points along dependencies
+      for (pkgCache::DepIterator D = InstVer.DependsList(); D.end() == false; ++D)

       {
       {

-        if (D->Type == pkgCache::Dep::Depends || 
-            D->Type == pkgCache::Dep::PreDepends)
-           Scores[D.TargetPkg()->ID] += PrioDepends;
-        else if (D->Type == pkgCache::Dep::Recommends)
-           Scores[D.TargetPkg()->ID] += PrioRecommends;
+        if (DepMap[D->Type] == 0)
+           continue;
+        pkgCache::PkgIterator const T = D.TargetPkg();
+        if (D->Version != 0)
+        {
+           pkgCache::VerIterator const IV = Cache[T].InstVerIter(Cache);
+           if (IV.end() == true || D.IsSatisfied(IV) == false)
+              continue;
+        }
+        Scores[T->ID] += DepMap[D->Type];

       }
       }

-   }   
-   
+   }
+

    // Copy the scores to advoid additive looping
    // Copy the scores to advoid additive looping

-   SPtrArray<int> OldScores = new int[Size];
-   memcpy(OldScores,Scores,sizeof(*Scores)*Size);
+   std::unique_ptr<int[]> OldScores(new int[Size]);
+   memcpy(OldScores.get(),Scores,sizeof(*Scores)*Size);

       
    /* Now we cause 1 level of dependency inheritance, that is we add the 
       score of the packages that depend on the target Package. This 
       
    /* Now we cause 1 level of dependency inheritance, that is we add the 
       score of the packages that depend on the target Package. This 


@@ -620,15 +633,12 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg)
 }
                                                                        /*}}}*/
 // ProblemResolver::Resolve - calls a resolver to fix the situation    /*{{{*/
 }
                                                                        /*}}}*/
 // ProblemResolver::Resolve - calls a resolver to fix the situation    /*{{{*/

-// ---------------------------------------------------------------------
-/* */
-bool pkgProblemResolver::Resolve(bool BrokenFix)
+bool pkgProblemResolver::Resolve(bool BrokenFix, OpProgress * const Progress)

 {
    std::string const solver = _config->Find("APT::Solver", "internal");
 {
    std::string const solver = _config->Find("APT::Solver", "internal");

-   if (solver != "internal") {
-      OpTextProgress Prog(*_config);
-      return EDSP::ResolveExternal(solver.c_str(), Cache, false, false, false, &Prog);
-   }
+   auto const ret = EDSP::ResolveExternal(solver.c_str(), Cache, 0, Progress);
+   if (solver != "internal")
+      return ret;

    return ResolveInternal(BrokenFix);
 }
                                                                        /*}}}*/
    return ResolveInternal(BrokenFix);
 }
                                                                        /*}}}*/


@@ -688,21 +698,21 @@ bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
       operates from highest score to lowest. This prevents problems when
       high score packages cause the removal of lower score packages that
       would cause the removal of even lower score packages. */
       operates from highest score to lowest. This prevents problems when
       high score packages cause the removal of lower score packages that
       would cause the removal of even lower score packages. */

-   SPtrArray<pkgCache::Package *> PList = new pkgCache::Package *[Size];
-   pkgCache::Package **PEnd = PList;
+   std::unique_ptr<pkgCache::Package *[]> PList(new pkgCache::Package *[Size]);
+   pkgCache::Package **PEnd = PList.get();

    for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       *PEnd++ = I;
    for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       *PEnd++ = I;

-   This = this;
-   qsort(PList,PEnd - PList,sizeof(*PList),&ScoreSort);
+
+   std::sort(PList.get(), PEnd, [this](Package *a, Package *b) { return ScoreSort(a, b) < 0; });

 
    if (_config->FindB("Debug::pkgProblemResolver::ShowScores",false) == true)
    {
       clog << "Show Scores" << endl;
 
    if (_config->FindB("Debug::pkgProblemResolver::ShowScores",false) == true)
    {
       clog << "Show Scores" << endl;

-      for (pkgCache::Package **K = PList; K != PEnd; K++)
+      for (pkgCache::Package **K = PList.get(); K != PEnd; K++)

          if (Scores[(*K)->ID] != 0)
          {
            pkgCache::PkgIterator Pkg(Cache,*K);
          if (Scores[(*K)->ID] != 0)
          {
            pkgCache::PkgIterator Pkg(Cache,*K);

-           clog << Scores[(*K)->ID] << ' ' << Pkg << std::endl;
+           clog << Scores[(*K)->ID] << ' ' << APT::PrettyPkg(&Cache, Pkg) << std::endl;

          }
    }
 
          }
    }
 


@@ -717,10 +727,11 @@ bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
       changing a breaks c) */
    bool Change = true;
    bool const TryFixByInstall = _config->FindB("pkgProblemResolver::FixByInstall", true);
       changing a breaks c) */
    bool Change = true;
    bool const TryFixByInstall = _config->FindB("pkgProblemResolver::FixByInstall", true);

+   std::vector<PackageKill> KillList;

    for (int Counter = 0; Counter != 10 && Change == true; Counter++)
    {
       Change = false;
    for (int Counter = 0; Counter != 10 && Change == true; Counter++)
    {
       Change = false;

-      for (pkgCache::Package **K = PList; K != PEnd; K++)
+      for (pkgCache::Package **K = PList.get(); K != PEnd; K++)

       {
         pkgCache::PkgIterator I(Cache,*K);
 
       {
         pkgCache::PkgIterator I(Cache,*K);
 


@@ -756,15 +767,15 @@ bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
            continue;
         
         if (Debug == true)
            continue;
         
         if (Debug == true)

-           clog << "Investigating (" << Counter << ") " << I << endl;
+           clog << "Investigating (" << Counter << ") " << APT::PrettyPkg(&Cache, I) << endl;

         
         // Isolate the problem dependency
         
         // Isolate the problem dependency

-        PackageKill KillList[100];
-        PackageKill *LEnd = KillList;

         bool InOr = false;
         pkgCache::DepIterator Start;
         pkgCache::DepIterator End;
         bool InOr = false;
         pkgCache::DepIterator Start;
         pkgCache::DepIterator End;

-        PackageKill *OldEnd = LEnd;
+        size_t OldSize = 0;
+
+        KillList.resize(0);

         
         enum {OrRemove,OrKeep} OrOp = OrRemove;
         for (pkgCache::DepIterator D = Cache[I].InstVerIter(Cache).DependsList();
         
         enum {OrRemove,OrKeep} OrOp = OrRemove;
         for (pkgCache::DepIterator D = Cache[I].InstVerIter(Cache).DependsList();


@@ -774,7 +785,7 @@ bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
            if (Start == End)
            {
               // Decide what to do
            if (Start == End)
            {
               // Decide what to do

-              if (InOr == true && OldEnd == LEnd)
+              if (InOr == true && OldSize == KillList.size())

               {
                  if (OrOp == OrRemove)
                  {
               {
                  if (OrOp == OrRemove)
                  {


@@ -808,7 +819,7 @@ bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
                  continue;
 
               InOr = Start != End;
                  continue;
 
               InOr = Start != End;

-              OldEnd = LEnd;
+              OldSize = KillList.size();

            }
            else
             {
            }
            else
             {


@@ -826,13 +837,13 @@ bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
            }
            
            if (Debug == true)
            }
            
            if (Debug == true)

-              clog << "Broken " << Start << endl;
+              clog << "Broken " << APT::PrettyDep(&Cache, Start) << endl;

 
            /* Look across the version list. If there are no possible
               targets then we keep the package and bail. This is necessary
               if a package has a dep on another package that can't be found */
 
            /* Look across the version list. If there are no possible
               targets then we keep the package and bail. This is necessary
               if a package has a dep on another package that can't be found */

-           SPtrArray<pkgCache::Version *> VList = Start.AllTargets();
-           if (*VList == 0 && (Flags[I->ID] & Protected) != Protected &&
+           std::unique_ptr<pkgCache::Version *[]> VList(Start.AllTargets());
+           if (VList[0] == 0 && (Flags[I->ID] & Protected) != Protected &&

                Start.IsNegative() == false &&
                Cache[I].NowBroken() == false)
            {          
                Start.IsNegative() == false &&
                Cache[I].NowBroken() == false)
            {          


@@ -849,7 +860,7 @@ bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
            }
            
            bool Done = false;
            }
            
            bool Done = false;

-           for (pkgCache::Version **V = VList; *V != 0; V++)
+           for (pkgCache::Version **V = VList.get(); *V != 0; V++)

            {
               pkgCache::VerIterator Ver(Cache,*V);
               pkgCache::PkgIterator Pkg = Ver.ParentPkg();
            {
               pkgCache::VerIterator Ver(Cache,*V);
               pkgCache::PkgIterator Pkg = Ver.ParentPkg();


@@ -869,8 +880,8 @@ bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
                }
 
               if (Debug == true)
                }
 
               if (Debug == true)

-                 clog << "  Considering " << Pkg.FullName(false) << ' ' << (int)Scores[Pkg->ID] <<
-                 " as a solution to " << I.FullName(false) << ' ' << (int)Scores[I->ID] << endl;
+                 clog << "  Considering " << Pkg.FullName(false) << ' ' << Scores[Pkg->ID] <<
+                 " as a solution to " << I.FullName(false) << ' ' << Scores[I->ID] << endl;

 
               /* Try to fix the package under consideration rather than
                  fiddle with the VList package */
 
               /* Try to fix the package under consideration rather than
                  fiddle with the VList package */


@@ -925,7 +936,7 @@ bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
                                 Start.TargetPkg()->CurrentVer == 0 &&
                                 Cache[Start.TargetPkg()].Delete() == false &&
                                 (Flags[Start.TargetPkg()->ID] & ToRemove) != ToRemove &&
                                 Start.TargetPkg()->CurrentVer == 0 &&
                                 Cache[Start.TargetPkg()].Delete() == false &&
                                 (Flags[Start.TargetPkg()->ID] & ToRemove) != ToRemove &&

-                                Cache.GetCandidateVer(Start.TargetPkg()).end() == false)
+                                Cache.GetCandidateVersion(Start.TargetPkg()).end() == false)

                        {
                           /* Before removing or keeping the package with the broken dependency
                              try instead to install the first not previously installed package
                        {
                           /* Before removing or keeping the package with the broken dependency
                              try instead to install the first not previously installed package


@@ -933,7 +944,7 @@ bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
                              is removed by the resolver because of a conflict or alike but it is
                              dangerous as it could trigger new breaks/conflicts… */
                           if (Debug == true)
                              is removed by the resolver because of a conflict or alike but it is
                              dangerous as it could trigger new breaks/conflicts… */
                           if (Debug == true)

-                             clog << "  Try Installing " << Start.TargetPkg() << " before changing " << I.FullName(false) << std::endl;
+                             clog << "  Try Installing " << APT::PrettyPkg(&Cache, Start.TargetPkg()) << " before changing " << I.FullName(false) << std::endl;

                           unsigned long const OldBroken = Cache.BrokenCount();
                           Cache.MarkInstall(Start.TargetPkg(), true, 1, false);
                           // FIXME: we should undo the complete MarkInstall process here
                           unsigned long const OldBroken = Cache.BrokenCount();
                           Cache.MarkInstall(Start.TargetPkg(), true, 1, false);
                           // FIXME: we should undo the complete MarkInstall process here


@@ -971,10 +982,8 @@ bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
                
                  if (Debug == true)
                     clog << "  Added " << Pkg.FullName(false) << " to the remove list" << endl;
                
                  if (Debug == true)
                     clog << "  Added " << Pkg.FullName(false) << " to the remove list" << endl;

-                 
-                 LEnd->Pkg = Pkg;
-                 LEnd->Dep = End;
-                 LEnd++;
+
+                 KillList.push_back({Pkg, End});

                  
                  if (Start.IsNegative() == false)
                     break;
                  
                  if (Start.IsNegative() == false)
                     break;


@@ -1024,7 +1033,7 @@ bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
         // Apply the kill list now
         if (Cache[I].InstallVer != 0)
         {
         // Apply the kill list now
         if (Cache[I].InstallVer != 0)
         {

-           for (PackageKill *J = KillList; J != LEnd; J++)
+           for (auto J = KillList.begin(); J != KillList.end(); J++)

            {
               Change = true;
               if ((Cache[J->Dep] & pkgDepCache::DepGNow) == 0)
            {
               Change = true;
               if ((Cache[J->Dep] & pkgDepCache::DepGNow) == 0)


@@ -1101,7 +1110,7 @@ bool pkgProblemResolver::InstOrNewPolicyBroken(pkgCache::PkgIterator I)
    if (Cache[I].InstBroken() == true)
    {
       if (Debug == true)
    if (Cache[I].InstBroken() == true)
    {
       if (Debug == true)

-        std::clog << "  Dependencies are not satisfied for " << I << std::endl;
+        std::clog << "  Dependencies are not satisfied for " << APT::PrettyPkg(&Cache, I) << std::endl;

       return true;
    }
 
       return true;
    }
 


@@ -1110,7 +1119,7 @@ bool pkgProblemResolver::InstOrNewPolicyBroken(pkgCache::PkgIterator I)
        Cache[I].InstPolicyBroken() == true)
    {
       if (Debug == true)
        Cache[I].InstPolicyBroken() == true)
    {
       if (Debug == true)

-        std::clog << "  Policy breaks with upgrade of " << I << std::endl;
+        std::clog << "  Policy breaks with upgrade of " << APT::PrettyPkg(&Cache, I) << std::endl;

       return true;
    }
 
       return true;
    }
 


@@ -1122,13 +1131,13 @@ bool pkgProblemResolver::InstOrNewPolicyBroken(pkgCache::PkgIterator I)
 /* This is the work horse of the soft upgrade routine. It is very gental 
    in that it does not install or remove any packages. It is assumed that the
    system was non-broken previously. */
 /* This is the work horse of the soft upgrade routine. It is very gental 
    in that it does not install or remove any packages. It is assumed that the
    system was non-broken previously. */

-bool pkgProblemResolver::ResolveByKeep()
+bool pkgProblemResolver::ResolveByKeep(OpProgress * const Progress)

 {
    std::string const solver = _config->Find("APT::Solver", "internal");
 {
    std::string const solver = _config->Find("APT::Solver", "internal");

-   if (solver != "internal") {
-      OpTextProgress Prog(*_config);
-      return EDSP::ResolveExternal(solver.c_str(), Cache, true, false, false, &Prog);
-   }
+   constexpr auto flags = EDSP::Request::UPGRADE_ALL | EDSP::Request::FORBID_NEW_INSTALL | EDSP::Request::FORBID_REMOVE;
+   auto const ret = EDSP::ResolveExternal(solver.c_str(), Cache, flags, Progress);
+   if (solver != "internal")
+      return ret;

    return ResolveByKeepInternal();
 }
                                                                        /*}}}*/
    return ResolveByKeepInternal();
 }
                                                                        /*}}}*/


@@ -1153,8 +1162,9 @@ bool pkgProblemResolver::ResolveByKeepInternal()
    pkgCache::Package **PEnd = PList;
    for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       *PEnd++ = I;
    pkgCache::Package **PEnd = PList;
    for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       *PEnd++ = I;

-   This = this;
-   qsort(PList,PEnd - PList,sizeof(*PList),&ScoreSort);
+
+   std::sort(PList,PEnd,[this](Package *a, Package *b) { return ScoreSort(a, b) < 0; });
+

 
    if (_config->FindB("Debug::pkgProblemResolver::ShowScores",false) == true)
    {
 
    if (_config->FindB("Debug::pkgProblemResolver::ShowScores",false) == true)
    {


@@ -1163,7 +1173,7 @@ bool pkgProblemResolver::ResolveByKeepInternal()
          if (Scores[(*K)->ID] != 0)
          {
            pkgCache::PkgIterator Pkg(Cache,*K);
          if (Scores[(*K)->ID] != 0)
          {
            pkgCache::PkgIterator Pkg(Cache,*K);

-           clog << Scores[(*K)->ID] << ' ' << Pkg << std::endl;
+           clog << Scores[(*K)->ID] << ' ' << APT::PrettyPkg(&Cache, Pkg) << std::endl;

          }
    }
 
          }
    }
 


@@ -1218,11 +1228,11 @@ bool pkgProblemResolver::ResolveByKeepInternal()
         while (true)
         {
            if (Debug == true)
         while (true)
         {
            if (Debug == true)

-              clog << "Package " << I.FullName(false) << " " << Start << endl;
+              clog << "Package " << I.FullName(false) << " " << APT::PrettyDep(&Cache, Start) << endl;

 
            // Look at all the possible provides on this package
 
            // Look at all the possible provides on this package

-           SPtrArray<pkgCache::Version *> VList = Start.AllTargets();
-           for (pkgCache::Version **V = VList; *V != 0; V++)
+           std::unique_ptr<pkgCache::Version *[]> VList(Start.AllTargets());
+           for (pkgCache::Version **V = VList.get(); *V != 0; V++)

            {
               pkgCache::VerIterator Ver(Cache,*V);
               pkgCache::PkgIterator Pkg = Ver.ParentPkg();
            {
               pkgCache::VerIterator Ver(Cache,*V);
               pkgCache::PkgIterator Pkg = Ver.ParentPkg();


@@ -1304,36 +1314,46 @@ void pkgProblemResolver::InstallProtect()
 // ---------------------------------------------------------------------
 /* This is ment to be used in conjunction with AllTargets to get a list 
    of versions ordered by preference. */
 // ---------------------------------------------------------------------
 /* This is ment to be used in conjunction with AllTargets to get a list 
    of versions ordered by preference. */

-static pkgCache *PrioCache;
-static int PrioComp(const void *A,const void *B)
-{
-   pkgCache::VerIterator L(*PrioCache,*(pkgCache::Version **)A);
-   pkgCache::VerIterator R(*PrioCache,*(pkgCache::Version **)B);
-   
-   if ((L.ParentPkg()->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential &&
-       (R.ParentPkg()->Flags & pkgCache::Flag::Essential) != pkgCache::Flag::Essential)
-     return 1;
-   if ((L.ParentPkg()->Flags & pkgCache::Flag::Essential) != pkgCache::Flag::Essential &&
-       (R.ParentPkg()->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
-     return -1;
-
-   if ((L.ParentPkg()->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important &&
-       (R.ParentPkg()->Flags & pkgCache::Flag::Important) != pkgCache::Flag::Important)
-     return 1;
-   if ((L.ParentPkg()->Flags & pkgCache::Flag::Important) != pkgCache::Flag::Important &&
-       (R.ParentPkg()->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important)
-     return -1;
-   
-   if (L->Priority != R->Priority)
-      return R->Priority - L->Priority;
-   return strcmp(L.ParentPkg().Name(),R.ParentPkg().Name());
-}
+
+struct PrioComp {
+   pkgCache &PrioCache;
+
+   explicit PrioComp(pkgCache &PrioCache) : PrioCache(PrioCache) {
+   }
+
+   bool operator() (pkgCache::Version * const &A, pkgCache::Version * const &B) {
+      return compare(A, B) < 0;
+   }
+
+   int compare(pkgCache::Version * const &A, pkgCache::Version * const &B) {
+      pkgCache::VerIterator L(PrioCache,A);
+      pkgCache::VerIterator R(PrioCache,B);
+
+      if ((L.ParentPkg()->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential &&
+         (R.ParentPkg()->Flags & pkgCache::Flag::Essential) != pkgCache::Flag::Essential)
+       return 1;
+      if ((L.ParentPkg()->Flags & pkgCache::Flag::Essential) != pkgCache::Flag::Essential &&
+         (R.ParentPkg()->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
+       return -1;
+
+      if ((L.ParentPkg()->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important &&
+         (R.ParentPkg()->Flags & pkgCache::Flag::Important) != pkgCache::Flag::Important)
+       return 1;
+      if ((L.ParentPkg()->Flags & pkgCache::Flag::Important) != pkgCache::Flag::Important &&
+         (R.ParentPkg()->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important)
+       return -1;
+
+      if (L->Priority != R->Priority)
+        return R->Priority - L->Priority;
+      return strcmp(L.ParentPkg().Name(),R.ParentPkg().Name());
+   }
+};
+

 void pkgPrioSortList(pkgCache &Cache,pkgCache::Version **List)
 {
    unsigned long Count = 0;
 void pkgPrioSortList(pkgCache &Cache,pkgCache::Version **List)
 {
    unsigned long Count = 0;

-   PrioCache = &Cache;

    for (pkgCache::Version **I = List; *I != 0; I++)
       Count++;
    for (pkgCache::Version **I = List; *I != 0; I++)
       Count++;

-   qsort(List,Count,sizeof(*List),PrioComp);
+   std::sort(List,List+Count,PrioComp(Cache));

 }
                                                                        /*}}}*/
 }
                                                                        /*}}}*/