use c++11 algorithms to avoid strange compiler warnings

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

diff --git a/apt-pkg/orderlist.cc b/apt-pkg/orderlist.cc
index 61d8d914e43b3bf6a52fc54c29b251b86dfc3402..d1118e3192f9a39b79dc1dd0def2444a1f0efde4 100644 (file)
--- a/apt-pkg/orderlist.cc
+++ b/apt-pkg/orderlist.cc
@@ -39,7 +39,7 @@
          ordering.  
    
    Each of the features can be enabled in the sorting routine at an 
          ordering.  
    
    Each of the features can be enabled in the sorting routine at an 

-   arbitary priority to give quite abit of control over the final unpacking
+   arbitrary priority to give quite abit of control over the final unpacking

    order.
 
    The rules listed above may never be violated and are called Critical.
    order.
 
    The rules listed above may never be violated and are called Critical.


@@ -63,16 +63,17 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/

-#ifdef __GNUG__
-#pragma implementation "apt-pkg/orderlist.h"
-#endif 
+#include<config.h>
+

 #include <apt-pkg/orderlist.h>
 #include <apt-pkg/depcache.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/orderlist.h>
 #include <apt-pkg/depcache.h>
 #include <apt-pkg/error.h>

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

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

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

 
 

+#include <stdlib.h>
+#include <string.h>

 #include <iostream>
                                                                        /*}}}*/
 
 #include <iostream>
                                                                        /*}}}*/
 


@@ -83,16 +84,14 @@ pkgOrderList *pkgOrderList::Me = 0;
 // OrderList::pkgOrderList - Constructor                               /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // OrderList::pkgOrderList - Constructor                               /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-pkgOrderList::pkgOrderList(pkgDepCache *pCache) : Cache(*pCache)
+pkgOrderList::pkgOrderList(pkgDepCache *pCache) : d(NULL), Cache(*pCache),
+                                                 Primary(NULL), Secondary(NULL),
+                                                 RevDepends(NULL), Remove(NULL),
+                                                 AfterEnd(NULL), FileList(NULL),
+                                                 LoopCount(-1), Depth(0)

 {
 {

-   FileList = 0;
-   Primary = 0;
-   Secondary = 0;
-   RevDepends = 0;
-   Remove = 0;
-   LoopCount = -1;

    Debug = _config->FindB("Debug::pkgOrderList",false);
    Debug = _config->FindB("Debug::pkgOrderList",false);

-   
+

    /* Construct the arrays, egcs 1.0.1 bug requires the package count
       hack */
    unsigned long Size = Cache.Head().PackageCount;
    /* Construct the arrays, egcs 1.0.1 bug requires the package count
       hack */
    unsigned long Size = Cache.Head().PackageCount;


@@ -120,7 +119,8 @@ bool pkgOrderList::IsMissing(PkgIterator Pkg)
       return false;
 
    // Skip Packages that need configure only.
       return false;
 
    // Skip Packages that need configure only.

-   if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure && 
+   if ((Pkg.State() == pkgCache::PkgIterator::NeedsConfigure ||
+        Pkg.State() == pkgCache::PkgIterator::NeedsNothing) &&

        Cache[Pkg].Keep() == true)
       return false;
 
        Cache[Pkg].Keep() == true)
       return false;
 


@@ -129,10 +129,10 @@ bool pkgOrderList::IsMissing(PkgIterator Pkg)
    
    if (FileList[Pkg->ID].empty() == false)
       return false;
    
    if (FileList[Pkg->ID].empty() == false)
       return false;

+

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/

-

 // OrderList::DoRun - Does an order run                                        /*{{{*/
 // ---------------------------------------------------------------------
 /* The caller is expeted to have setup the desired probe state */
 // OrderList::DoRun - Does an order run                                        /*{{{*/
 // ---------------------------------------------------------------------
 /* The caller is expeted to have setup the desired probe state */


@@ -140,33 +140,33 @@ bool pkgOrderList::DoRun()
 {   
    // Temp list
    unsigned long Size = Cache.Head().PackageCount;
 {   
    // Temp list
    unsigned long Size = Cache.Head().PackageCount;

-   SPtrArray<Package *> NList = new Package *[Size];
-   SPtrArray<Package *> AfterList = new Package *[Size];
-   AfterEnd = AfterList;
+   std::unique_ptr<Package *[]> NList(new Package *[Size]);
+   std::unique_ptr<Package *[]> AfterList(new Package *[Size]);
+   AfterEnd = AfterList.get();

    
    Depth = 0;
    WipeFlags(Added | AddPending | Loop | InList);
 
    
    Depth = 0;
    WipeFlags(Added | AddPending | Loop | InList);
 

-   for (iterator I = List; I != End; I++)
+   for (iterator I = List; I != End; ++I)

       Flag(*I,InList);
 
    // Rebuild the main list into the temp list.
    iterator OldEnd = End;
       Flag(*I,InList);
 
    // Rebuild the main list into the temp list.
    iterator OldEnd = End;

-   End = NList;
-   for (iterator I = List; I != OldEnd; I++)
-      if (VisitNode(PkgIterator(Cache,*I)) == false)
+   End = NList.get();
+   for (iterator I = List; I != OldEnd; ++I)
+      if (VisitNode(PkgIterator(Cache,*I), "DoRun") == false)

       {
         End = OldEnd;
         return false;
       }
    
    // Copy the after list to the end of the main list
       {
         End = OldEnd;
         return false;
       }
    
    // Copy the after list to the end of the main list

-   for (Package **I = AfterList; I != AfterEnd; I++)
+   for (Package **I = AfterList.get(); I != AfterEnd; I++)

       *End++ = *I;
    
    // Swap the main list to the new list
    delete [] List;
       *End++ = *I;
    
    // Swap the main list to the new list
    delete [] List;

-   List = NList.UnGuard();
+   List = NList.release();

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/


@@ -178,22 +178,35 @@ bool pkgOrderList::DoRun()
 bool pkgOrderList::OrderCritical()
 {
    FileList = 0;
 bool pkgOrderList::OrderCritical()
 {
    FileList = 0;

-   
-   Primary = &pkgOrderList::DepUnPackPre;
+
+   Primary = &pkgOrderList::DepUnPackPreD;

    Secondary = 0;
    RevDepends = 0;
    Remove = 0;
    LoopCount = 0;
    Secondary = 0;
    RevDepends = 0;
    Remove = 0;
    LoopCount = 0;

-   
+

    // Sort
    Me = this;
    // Sort
    Me = this;

-   qsort(List,End - List,sizeof(*List),&OrderCompareB);   
-   
+   qsort(List,End - List,sizeof(*List),&OrderCompareB);
+

    if (DoRun() == false)
       return false;
    if (DoRun() == false)
       return false;

-   
+

    if (LoopCount != 0)
       return _error->Error("Fatal, predepends looping detected");
    if (LoopCount != 0)
       return _error->Error("Fatal, predepends looping detected");

+
+   if (Debug == true)
+   {
+      clog << "** Critical Unpack ordering done" << endl;
+
+      for (iterator I = List; I != End; ++I)
+      {
+        PkgIterator P(Cache,*I);
+        if (IsNow(P) == true)
+           clog << "  " << P.FullName() << ' ' << IsMissing(P) << ',' << IsFlag(P,After) << endl;
+      }
+   }
+

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/


@@ -209,16 +222,16 @@ bool pkgOrderList::OrderUnpack(string *FileList)
    if (FileList != 0)
    {
       WipeFlags(After);
    if (FileList != 0)
    {
       WipeFlags(After);

-      
+

       // Set the inlist flag
       // Set the inlist flag

-      for (iterator I = List; I != End; I++)
+      for (iterator I = List; I != End; ++I)

       {
         PkgIterator P(Cache,*I);
         if (IsMissing(P) == true && IsNow(P) == true)
             Flag(*I,After);
       }
    }
       {
         PkgIterator P(Cache,*I);
         if (IsMissing(P) == true && IsNow(P) == true)
             Flag(*I,After);
       }
    }

-   
+

    Primary = &pkgOrderList::DepUnPackCrit;
    Secondary = &pkgOrderList::DepConfigure;
    RevDepends = &pkgOrderList::DepUnPackDep;
    Primary = &pkgOrderList::DepUnPackCrit;
    Secondary = &pkgOrderList::DepConfigure;
    RevDepends = &pkgOrderList::DepUnPackDep;


@@ -233,7 +246,7 @@ bool pkgOrderList::OrderUnpack(string *FileList)
       clog << "** Pass A" << endl;
    if (DoRun() == false)
       return false;
       clog << "** Pass A" << endl;
    if (DoRun() == false)
       return false;

-   
+

    if (Debug == true)
       clog << "** Pass B" << endl;
    Secondary = 0;
    if (Debug == true)
       clog << "** Pass B" << endl;
    Secondary = 0;


@@ -244,10 +257,10 @@ bool pkgOrderList::OrderUnpack(string *FileList)
       clog << "** Pass C" << endl;
    LoopCount = 0;
    RevDepends = 0;
       clog << "** Pass C" << endl;
    LoopCount = 0;
    RevDepends = 0;

-   Remove = 0;             // Otherwise the libreadline remove problem occures
+   Remove = 0;             // Otherwise the libreadline remove problem occurs

    if (DoRun() == false)
       return false;
    if (DoRun() == false)
       return false;

-      
+

    if (Debug == true)
       clog << "** Pass D" << endl;
    LoopCount = 0;
    if (Debug == true)
       clog << "** Pass D" << endl;
    LoopCount = 0;


@@ -259,13 +272,13 @@ bool pkgOrderList::OrderUnpack(string *FileList)
    {
       clog << "** Unpack ordering done" << endl;
 
    {
       clog << "** Unpack ordering done" << endl;
 

-      for (iterator I = List; I != End; I++)
+      for (iterator I = List; I != End; ++I)

       {
         PkgIterator P(Cache,*I);
         if (IsNow(P) == true)
       {
         PkgIterator P(Cache,*I);
         if (IsNow(P) == true)

-           clog << P.Name() << ' ' << IsMissing(P) << ',' << IsFlag(P,After) << endl;
+           clog << "  " << P.FullName() << ' ' << IsMissing(P) << ',' << IsFlag(P,After) << endl;

       }
       }

-   }   
+   }

 
    return true;
 }
 
    return true;
 }


@@ -285,39 +298,45 @@ bool pkgOrderList::OrderConfigure()
    return DoRun();
 }
                                                                        /*}}}*/
    return DoRun();
 }
                                                                        /*}}}*/

-

 // OrderList::Score - Score the package for sorting                    /*{{{*/
 // ---------------------------------------------------------------------
 /* Higher scores order earlier */
 int pkgOrderList::Score(PkgIterator Pkg)
 {
 // OrderList::Score - Score the package for sorting                    /*{{{*/
 // ---------------------------------------------------------------------
 /* Higher scores order earlier */
 int pkgOrderList::Score(PkgIterator Pkg)
 {

-   // Removal is always done first
+   // Removals should be done after we dealt with essentials
+   static int const ScoreDelete = _config->FindI("OrderList::Score::Delete", 100);

    if (Cache[Pkg].Delete() == true)
    if (Cache[Pkg].Delete() == true)

-      return 200;
-   
+      return ScoreDelete;
+

    // This should never happen..
    if (Cache[Pkg].InstVerIter(Cache).end() == true)
       return -1;
    // This should never happen..
    if (Cache[Pkg].InstVerIter(Cache).end() == true)
       return -1;

-   
+
+   static int const ScoreEssential = _config->FindI("OrderList::Score::Essential", 200);
+   static int const ScoreImmediate = _config->FindI("OrderList::Score::Immediate", 10);
+   static int const ScorePreDepends = _config->FindI("OrderList::Score::PreDepends", 50);
+

    int Score = 0;
    if ((Pkg->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
    int Score = 0;
    if ((Pkg->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)

-      Score += 100;
+      Score += ScoreEssential;

 
    if (IsFlag(Pkg,Immediate) == true)
 
    if (IsFlag(Pkg,Immediate) == true)

-      Score += 10;
-   
-   for (DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList(); 
-       D.end() == false; D++)
+      Score += ScoreImmediate;
+
+   for (DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList();
+       D.end() == false; ++D)

       if (D->Type == pkgCache::Dep::PreDepends)
       {
       if (D->Type == pkgCache::Dep::PreDepends)
       {

-        Score += 50;
+        Score += ScorePreDepends;

         break;
       }
         break;
       }

-      
+

    // Important Required Standard Optional Extra
    // Important Required Standard Optional Extra

-   signed short PrioMap[] = {0,5,4,3,1,0};

    if (Cache[Pkg].InstVerIter(Cache)->Priority <= 5)
    if (Cache[Pkg].InstVerIter(Cache)->Priority <= 5)

+   {
+      signed short PrioMap[] = {0,5,4,3,1,0};

       Score += PrioMap[Cache[Pkg].InstVerIter(Cache)->Priority];
       Score += PrioMap[Cache[Pkg].InstVerIter(Cache)->Priority];

+   }

    return Score;
 }
                                                                        /*}}}*/
    return Score;
 }
                                                                        /*}}}*/


@@ -391,6 +410,7 @@ int pkgOrderList::OrderCompareA(const void *a, const void *b)
    
    int ScoreA = Me->Score(A);
    int ScoreB = Me->Score(B);
    
    int ScoreA = Me->Score(A);
    int ScoreB = Me->Score(B);

+

    if (ScoreA > ScoreB)
       return -1;
    
    if (ScoreA > ScoreB)
       return -1;
    


@@ -427,6 +447,7 @@ int pkgOrderList::OrderCompareB(const void *a, const void *b)
    
    int ScoreA = Me->Score(A);
    int ScoreB = Me->Score(B);
    
    int ScoreA = Me->Score(A);
    int ScoreB = Me->Score(B);

+

    if (ScoreA > ScoreB)
       return -1;
    
    if (ScoreA > ScoreB)
       return -1;
    


@@ -436,7 +457,6 @@ int pkgOrderList::OrderCompareB(const void *a, const void *b)
    return strcmp(A.Name(),B.Name());
 }
                                                                        /*}}}*/
    return strcmp(A.Name(),B.Name());
 }
                                                                        /*}}}*/

-

 // OrderList::VisitDeps - Visit forward install dependencies           /*{{{*/
 // ---------------------------------------------------------------------
 /* This calls the dependency function for the normal forwards dependencies
 // OrderList::VisitDeps - Visit forward install dependencies           /*{{{*/
 // ---------------------------------------------------------------------
 /* This calls the dependency function for the normal forwards dependencies


@@ -471,44 +491,76 @@ bool pkgOrderList::VisitRProvides(DepFunc F,VerIterator Ver)
       return true;
    
    bool Res = true;
       return true;
    
    bool Res = true;

-   for (PrvIterator P = Ver.ProvidesList(); P.end() == false; P++)
+   for (PrvIterator P = Ver.ProvidesList(); P.end() == false; ++P)

       Res &= (this->*F)(P.ParentPkg().RevDependsList());
       Res &= (this->*F)(P.ParentPkg().RevDependsList());

-   return true;
+   return Res;

 }
                                                                        /*}}}*/
 // OrderList::VisitProvides - Visit all of the providing packages      /*{{{*/
 // ---------------------------------------------------------------------
 }
                                                                        /*}}}*/
 // OrderList::VisitProvides - Visit all of the providing packages      /*{{{*/
 // ---------------------------------------------------------------------

-/* This routine calls visit on all providing packages. */
+/* This routine calls visit on all providing packages.
+
+   If the dependency is negative it first visits packages which are
+   intended to be removed and after that all other packages.
+   It does so to avoid situations in which this package is used to
+   satisfy a (or-group/provides) dependency of another package which
+   could have been satisfied also by upgrading another package -
+   otherwise we have more broken packages dpkg needs to auto-
+   deconfigure and in very complicated situations it even decides
+   against it! */

 bool pkgOrderList::VisitProvides(DepIterator D,bool Critical)
 bool pkgOrderList::VisitProvides(DepIterator D,bool Critical)

-{   
-   SPtrArray<Version *> List = D.AllTargets();
-   for (Version **I = List; *I != 0; I++)
+{
+   std::unique_ptr<Version *[]> List(D.AllTargets());
+   for (Version **I = List.get(); *I != 0; ++I)

    {
       VerIterator Ver(Cache,*I);
       PkgIterator Pkg = Ver.ParentPkg();
 
    {
       VerIterator Ver(Cache,*I);
       PkgIterator Pkg = Ver.ParentPkg();
 

+      if (D.IsNegative() == true && Cache[Pkg].Delete() == false)
+        continue;
+

       if (Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing)
         continue;
       if (Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing)
         continue;

-      
-      if (D->Type != pkgCache::Dep::Conflicts &&
-         D->Type != pkgCache::Dep::DpkgBreaks &&
-         D->Type != pkgCache::Dep::Obsoletes &&
+
+      if (D.IsNegative() == false &&

          Cache[Pkg].InstallVer != *I)
         continue;
          Cache[Pkg].InstallVer != *I)
         continue;

-      
-      if ((D->Type == pkgCache::Dep::Conflicts ||
-          D->Type == pkgCache::Dep::DpkgBreaks ||
-          D->Type == pkgCache::Dep::Obsoletes) &&
+
+      if (D.IsNegative() == true &&

          (Version *)Pkg.CurrentVer() != *I)
         continue;
          (Version *)Pkg.CurrentVer() != *I)
         continue;

-      
+

       // Skip over missing files
       if (Critical == false && IsMissing(D.ParentPkg()) == true)
         continue;
 
       // Skip over missing files
       if (Critical == false && IsMissing(D.ParentPkg()) == true)
         continue;
 

-      if (VisitNode(Pkg) == false)
+      if (VisitNode(Pkg, "Provides-1") == false)

         return false;
    }
         return false;
    }

+   if (D.IsNegative() == false)
+      return true;
+   for (Version **I = List.get(); *I != 0; ++I)
+   {
+      VerIterator Ver(Cache,*I);
+      PkgIterator Pkg = Ver.ParentPkg();
+
+      if (Cache[Pkg].Delete() == true)
+        continue;
+
+      if (Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing)
+        continue;
+
+      if ((Version *)Pkg.CurrentVer() != *I)
+        continue;
+
+      // Skip over missing files
+      if (Critical == false && IsMissing(D.ParentPkg()) == true)
+        continue;
+
+      if (VisitNode(Pkg, "Provides-2") == false)
+        return false;
+   }
+

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/


@@ -516,10 +568,10 @@ bool pkgOrderList::VisitProvides(DepIterator D,bool Critical)
 // ---------------------------------------------------------------------
 /* This is the core ordering routine. It calls the set dependency
    consideration functions which then potentialy call this again. Finite
 // ---------------------------------------------------------------------
 /* This is the core ordering routine. It calls the set dependency
    consideration functions which then potentialy call this again. Finite

-   depth is achived through the colouring mechinism. */
-bool pkgOrderList::VisitNode(PkgIterator Pkg)
+   depth is achieved through the colouring mechinism. */
+bool pkgOrderList::VisitNode(PkgIterator Pkg, char const* from)

 {
 {

-   // Looping or irrelevent.
+   // Looping or irrelevant.

    // This should probably trancend not installed packages
    if (Pkg.end() == true || IsFlag(Pkg,Added) == true || 
        IsFlag(Pkg,AddPending) == true || IsFlag(Pkg,InList) == false)
    // This should probably trancend not installed packages
    if (Pkg.end() == true || IsFlag(Pkg,Added) == true || 
        IsFlag(Pkg,AddPending) == true || IsFlag(Pkg,InList) == false)


@@ -528,7 +580,7 @@ bool pkgOrderList::VisitNode(PkgIterator Pkg)
    if (Debug == true)
    {
       for (int j = 0; j != Depth; j++) clog << ' ';
    if (Debug == true)
    {
       for (int j = 0; j != Depth; j++) clog << ' ';

-      clog << "Visit " << Pkg.Name() << endl;
+      clog << "Visit " << Pkg.FullName() << " from " << from << endl;

    }
    
    Depth++;
    }
    
    Depth++;


@@ -587,13 +639,12 @@ bool pkgOrderList::VisitNode(PkgIterator Pkg)
    if (Debug == true)
    {
       for (int j = 0; j != Depth; j++) clog << ' ';
    if (Debug == true)
    {
       for (int j = 0; j != Depth; j++) clog << ' ';

-      clog << "Leave " << Pkg.Name() << ' ' << IsFlag(Pkg,Added) << ',' << IsFlag(Pkg,AddPending) << endl;
+      clog << "Leave " << Pkg.FullName() << ' ' << IsFlag(Pkg,Added) << ',' << IsFlag(Pkg,AddPending) << endl;

    }
    
    return true;
 }
                                                                        /*}}}*/
    }
    
    return true;
 }
                                                                        /*}}}*/

-

 // OrderList::DepUnPackCrit - Critical UnPacking ordering              /*{{{*/
 // ---------------------------------------------------------------------
 /* Critical unpacking ordering strives to satisfy Conflicts: and 
 // OrderList::DepUnPackCrit - Critical UnPacking ordering              /*{{{*/
 // ---------------------------------------------------------------------
 /* Critical unpacking ordering strives to satisfy Conflicts: and 


@@ -603,7 +654,7 @@ bool pkgOrderList::VisitNode(PkgIterator Pkg)
    Loops are preprocessed and logged. */
 bool pkgOrderList::DepUnPackCrit(DepIterator D)
 {
    Loops are preprocessed and logged. */
 bool pkgOrderList::DepUnPackCrit(DepIterator D)
 {

-   for (; D.end() == false; D++)
+   for (; D.end() == false; ++D)

    {
       if (D.Reverse() == true)
       {
    {
       if (D.Reverse() == true)
       {


@@ -624,16 +675,14 @@ bool pkgOrderList::DepUnPackCrit(DepIterator D)
         if (CheckDep(D) == true)
            continue;
 
         if (CheckDep(D) == true)
            continue;
 

-        if (VisitNode(D.ParentPkg()) == false)
+        if (VisitNode(D.ParentPkg(), "UnPackCrit") == false)

            return false;
       }
       else
       {
         /* Forward critical dependencies MUST be correct before the 
            package can be unpacked. */
            return false;
       }
       else
       {
         /* Forward critical dependencies MUST be correct before the 
            package can be unpacked. */

-        if (D->Type != pkgCache::Dep::Conflicts &&
-            D->Type != pkgCache::Dep::DpkgBreaks &&
-            D->Type != pkgCache::Dep::Obsoletes &&
+        if (D.IsNegative() == false &&

             D->Type != pkgCache::Dep::PreDepends)
            continue;
                                 
             D->Type != pkgCache::Dep::PreDepends)
            continue;
                                 


@@ -671,20 +720,19 @@ bool pkgOrderList::DepUnPackCrit(DepIterator D)
    }   
    return true;
 }
    }   
    return true;
 }

-
+                                                                       /*}}}*/

 // OrderList::DepUnPackPreD - Critical UnPacking ordering with depends /*{{{*/
 // ---------------------------------------------------------------------
 /* Critical PreDepends (also configure immediate and essential) strives to
    ensure not only that all conflicts+predepends are met but that this
 // OrderList::DepUnPackPreD - Critical UnPacking ordering with depends /*{{{*/
 // ---------------------------------------------------------------------
 /* Critical PreDepends (also configure immediate and essential) strives to
    ensure not only that all conflicts+predepends are met but that this

-   package will be immediately configurable when it is unpacked. 
-
+   package will be immediately configurable when it is unpacked.

    Loops are preprocessed and logged. */
 bool pkgOrderList::DepUnPackPreD(DepIterator D)
 {
    if (D.Reverse() == true)
       return DepUnPackCrit(D);
    
    Loops are preprocessed and logged. */
 bool pkgOrderList::DepUnPackPreD(DepIterator D)
 {
    if (D.Reverse() == true)
       return DepUnPackCrit(D);
    

-   for (; D.end() == false; D++)
+   for (; D.end() == false; ++D)

    {
       if (D.IsCritical() == false)
         continue;
    {
       if (D.IsCritical() == false)
         continue;


@@ -727,7 +775,7 @@ bool pkgOrderList::DepUnPackPre(DepIterator D)
    if (D.Reverse() == true)
       return true;
    
    if (D.Reverse() == true)
       return true;
    

-   for (; D.end() == false; D++)
+   for (; D.end() == false; ++D)

    {
       /* Only consider the PreDepends or Depends. Depends are only
                 considered at the lowest depth or in the case of immediate
    {
       /* Only consider the PreDepends or Depends. Depends are only
                 considered at the lowest depth or in the case of immediate


@@ -778,11 +826,11 @@ bool pkgOrderList::DepUnPackPre(DepIterator D)
    The forwards depends loop is designed to bring the packages dependents
    close to the package. This helps reduce deconfigure time. 
    
    The forwards depends loop is designed to bring the packages dependents
    close to the package. This helps reduce deconfigure time. 
    

-   Loops are irrelevent to this. */
+   Loops are irrelevant to this. */

 bool pkgOrderList::DepUnPackDep(DepIterator D)
 {
    
 bool pkgOrderList::DepUnPackDep(DepIterator D)
 {
    

-   for (; D.end() == false; D++)
+   for (; D.end() == false; ++D)

       if (D.IsCritical() == true)
       {
         if (D.Reverse() == true)
       if (D.IsCritical() == true)
       {
         if (D.Reverse() == true)


@@ -794,7 +842,7 @@ bool pkgOrderList::DepUnPackDep(DepIterator D)
                D.ParentPkg().CurrentVer() != D.ParentVer())
               continue;
 
                D.ParentPkg().CurrentVer() != D.ParentVer())
               continue;
 

-           // The dep will not break so it is irrelevent.
+           // The dep will not break so it is irrelevant.

            if (CheckDep(D) == true)
               continue;
            
            if (CheckDep(D) == true)
               continue;
            


@@ -802,7 +850,7 @@ bool pkgOrderList::DepUnPackDep(DepIterator D)
            if (IsMissing(D.ParentPkg()) == true)
               continue;
            
            if (IsMissing(D.ParentPkg()) == true)
               continue;
            

-           if (VisitNode(D.ParentPkg()) == false)
+           if (VisitNode(D.ParentPkg(), "UnPackDep-Parent") == false)

               return false;
         }
         else
               return false;
         }
         else


@@ -816,7 +864,7 @@ bool pkgOrderList::DepUnPackDep(DepIterator D)
               if (CheckDep(D) == true)
                 continue;
 
               if (CheckDep(D) == true)
                 continue;
 

-              if (VisitNode(D.TargetPkg()) == false)
+              if (VisitNode(D.TargetPkg(), "UnPackDep-Target") == false)

                 return false;
            }
         }
                 return false;
            }
         }


@@ -837,7 +885,7 @@ bool pkgOrderList::DepConfigure(DepIterator D)
    if (D.Reverse() == true)
       return true;
    
    if (D.Reverse() == true)
       return true;
    

-   for (; D.end() == false; D++)
+   for (; D.end() == false; ++D)

       if (D->Type == pkgCache::Dep::Depends)
         if (VisitProvides(D,false) == false)
            return false;
       if (D->Type == pkgCache::Dep::Depends)
         if (VisitProvides(D,false) == false)
            return false;


@@ -846,56 +894,139 @@ bool pkgOrderList::DepConfigure(DepIterator D)
                                                                        /*}}}*/
 // OrderList::DepRemove - Removal ordering                             /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // OrderList::DepRemove - Removal ordering                             /*{{{*/
 // ---------------------------------------------------------------------

-/* Removal visits all reverse depends. It considers if the dependency
-   of the Now state version to see if it is okay with removing this
-   package. This check should always fail, but is provided for symetery
-   with the other critical handlers.
- 
-   Loops are preprocessed and logged. Removal loops can also be
-   detected in the critical handler. They are characterized by an
-   old version of A depending on B but the new version of A conflicting
-   with B, thus either A or B must break to install. */
-bool pkgOrderList::DepRemove(DepIterator D)
+/* Checks all given dependencies if they are broken by the remove of a
+   package and if so fix it by visiting another provider or or-group
+   member to ensure that the dependee keeps working which is especially
+   important for Immediate packages like e.g. those depending on an
+   awk implementation. If the dependency can't be fixed with another
+   package this means an upgrade of the package will solve the problem. */
+bool pkgOrderList::DepRemove(DepIterator Broken)

 {
 {

-   if (D.Reverse() == false)
+   if (Broken.Reverse() == false)

       return true;
       return true;

-   for (; D.end() == false; D++)
-      if (D->Type == pkgCache::Dep::Depends || D->Type == pkgCache::Dep::PreDepends)
+
+   for (; Broken.end() == false; ++Broken)
+   {
+      if (Broken->Type != pkgCache::Dep::Depends &&
+           Broken->Type != pkgCache::Dep::PreDepends)
+        continue;
+
+      PkgIterator BrokenPkg = Broken.ParentPkg();
+      // uninstalled packages can't break via a remove
+      if (BrokenPkg->CurrentVer == 0)
+        continue;
+
+      // if its already added, we can't do anything useful
+      if (IsFlag(BrokenPkg, AddPending) == true || IsFlag(BrokenPkg, Added) == true)
+        continue;
+
+      // if the dependee is going to be removed, visit it now
+      if (Cache[BrokenPkg].Delete() == true)
+        return VisitNode(BrokenPkg, "Remove-Dependee");
+
+      // The package stays around, so find out how this is possible
+      for (DepIterator D = BrokenPkg.CurrentVer().DependsList(); D.end() == false;)

       {
       {

-        // Duplication elimination, consider the current version only
-        if (D.ParentPkg().CurrentVer() != D.ParentVer())
+        // only important or-groups need fixing
+        if (D->Type != pkgCache::Dep::Depends &&
+              D->Type != pkgCache::Dep::PreDepends)
+        {
+           ++D;

            continue;
            continue;

+        }

 
 

-        /* We wish to see if the dep on the parent package is okay
-           in the removed (install) state of the target pkg. */         
-        if (CheckDep(D) == true)
+        // Start is the beginning of the or-group, D is the first one after or
+        DepIterator Start = D;
+        bool foundBroken = false;
+        for (bool LastOR = true; D.end() == false && LastOR == true; ++D)

         {
         {

-           // We want to catch loops with the code below.
-           if (IsFlag(D.ParentPkg(),AddPending) == false)
-              continue;
+           LastOR = (D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or;
+           if (D == Broken)
+              foundBroken = true;

         }
 
         }
 

-        // This is the loop detection
-        if (IsFlag(D.ParentPkg(),Added) == true || 
-            IsFlag(D.ParentPkg(),AddPending) == true)
-        {
-           if (IsFlag(D.ParentPkg(),AddPending) == true)
-              AddLoop(D);
+        // this or-group isn't the broken one: keep searching
+        if (foundBroken == false)

            continue;
            continue;

+
+        // iterate over all members of the or-group searching for a ready replacement
+        bool readyReplacement = false;
+        for (DepIterator OrMember = Start; OrMember != D && readyReplacement == false; ++OrMember)
+        {
+           Version ** Replacements = OrMember.AllTargets();
+           for (Version **R = Replacements; *R != 0; ++R)
+           {
+              VerIterator Ver(Cache,*R);
+              // only currently installed packages can be a replacement
+              PkgIterator RPkg = Ver.ParentPkg();
+              if (RPkg.CurrentVer() != Ver)
+                 continue;
+
+              // packages going to be removed can't be a replacement
+              if (Cache[RPkg].Delete() == true)
+                 continue;
+
+              readyReplacement = true;
+              break;
+           }
+           delete[] Replacements;

         }
 
         }
 

-        // Skip over missing files
-        if (IsMissing(D.ParentPkg()) == true)
+        // something else is ready to take over, do nothing
+        if (readyReplacement == true)

            continue;
            continue;

-        
-        if (VisitNode(D.ParentPkg()) == false)
+
+        // see if we can visit a replacement
+        bool visitReplacement = false;
+        for (DepIterator OrMember = Start; OrMember != D && visitReplacement == false; ++OrMember)
+        {
+           Version ** Replacements = OrMember.AllTargets();
+           for (Version **R = Replacements; *R != 0; ++R)
+           {
+              VerIterator Ver(Cache,*R);
+              // consider only versions we plan to install
+              PkgIterator RPkg = Ver.ParentPkg();
+              if (Cache[RPkg].Install() == false || Cache[RPkg].InstallVer != Ver)
+                 continue;
+
+              // loops are not going to help us, so don't create them
+              if (IsFlag(RPkg, AddPending) == true)
+                 continue;
+
+              if (IsMissing(RPkg) == true)
+                 continue;
+
+              visitReplacement = true;
+              if (IsFlag(BrokenPkg, Immediate) == false)
+              {
+                 if (VisitNode(RPkg, "Remove-Rep") == true)
+                    break;
+              }
+              else
+              {
+                 Flag(RPkg, Immediate);
+                 if (VisitNode(RPkg, "Remove-ImmRep") == true)
+                    break;
+              }
+              visitReplacement = false;
+           }
+           delete[] Replacements;
+        }
+        if (visitReplacement == true)
+           continue;
+
+        // the broken package in current version can't be fixed, so install new version
+        if (IsMissing(BrokenPkg) == true)
+           break;
+
+        if (VisitNode(BrokenPkg, "Remove-Upgrade") == false)

            return false;
       }
            return false;
       }

-   
+   }
+

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/

-

 // OrderList::AddLoop - Add a loop to the loop list                    /*{{{*/
 // ---------------------------------------------------------------------
 /* We record the loops. This is a relic since loop breaking is done 
 // OrderList::AddLoop - Add a loop to the loop list                    /*{{{*/
 // ---------------------------------------------------------------------
 /* We record the loops. This is a relic since loop breaking is done 


@@ -916,8 +1047,10 @@ bool pkgOrderList::AddLoop(DepIterator D)
    Loops[LoopCount++] = D;
    
    // Mark the packages as being part of a loop.
    Loops[LoopCount++] = D;
    
    // Mark the packages as being part of a loop.

-   Flag(D.TargetPkg(),Loop);
-   Flag(D.ParentPkg(),Loop);
+   //Flag(D.TargetPkg(),Loop);
+   //Flag(D.ParentPkg(),Loop);
+   /* This is currently disabled because the Loop flag is being used for
+      loop management in the package manager. Check the orderlist.h file for more info */

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/


@@ -940,9 +1073,9 @@ void pkgOrderList::WipeFlags(unsigned long F)
    this fails to produce a suitable result. */
 bool pkgOrderList::CheckDep(DepIterator D)
 {
    this fails to produce a suitable result. */
 bool pkgOrderList::CheckDep(DepIterator D)
 {

-   SPtrArray<Version *> List = D.AllTargets();
+   std::unique_ptr<Version *[]> List(D.AllTargets());

    bool Hit = false;
    bool Hit = false;

-   for (Version **I = List; *I != 0; I++)
+   for (Version **I = List.get(); *I != 0; I++)

    {
       VerIterator Ver(Cache,*I);
       PkgIterator Pkg = Ver.ParentPkg();
    {
       VerIterator Ver(Cache,*I);
       PkgIterator Pkg = Ver.ParentPkg();


@@ -966,10 +1099,14 @@ bool pkgOrderList::CheckDep(DepIterator D)
       
       /* Conflicts requires that all versions are not present, depends
          just needs one */
       
       /* Conflicts requires that all versions are not present, depends
          just needs one */

-      if (D->Type != pkgCache::Dep::Conflicts && 
-         D->Type != pkgCache::Dep::DpkgBreaks && 
-         D->Type != pkgCache::Dep::Obsoletes)
+      if (D.IsNegative() == false)

       {
       {

+        // ignore provides by older versions of this package
+        if (((D.Reverse() == false && Pkg == D.ParentPkg()) ||
+             (D.Reverse() == true && Pkg == D.TargetPkg())) &&
+            Cache[Pkg].InstallVer != *I)
+           continue;
+

         /* Try to find something that does not have the after flag set
            if at all possible */
         if (IsFlag(Pkg,After) == true)
         /* Try to find something that does not have the after flag set
            if at all possible */
         if (IsFlag(Pkg,After) == true)